Medicine by Sfakianakis Alexandros: 05/07/18

Δευτέρα 7 Μαΐου 2018

VISTA expression on tumor-infiltrating inflammatory cells in primary cutaneous melanoma correlates with poor disease-specific survival

Abstract

Adaptive immune responses contribute to the pathogenesis of melanoma by facilitating immune evasion. V-domain Ig suppressor of T-cell activation (VISTA) is a potent negative regulator of T-cell function and is expressed at high levels on monocytes, granulocytes, and macrophages, and at lower densities on T-cell populations within the tumor microenvironment. In this study, 85 primary melanoma specimens were selected from pathology tissue archives and immunohistochemically stained for CD3, PD-1, PD-L1, and VISTA. Pearson's correlation coefficients identified associations in expression between VISTA and myeloid infiltrate (r = 0.28, p = 0.009) and the density of PD-1+ inflammatory cells (r = 0.31, p = 0.005). The presence of VISTA was associated with a significantly worse disease-specific survival in univariate analysis (hazard ratio = 3.57, p = 0.005) and multivariate analysis (hazard ratio = 3.02, p = 0.02). Our findings show that VISTA expression is an independent negative prognostic factor in primary cutaneous melanoma and suggests its potential as an adjuvant immunotherapeutic intervention in the future.

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Bell’s Palsy-Tertiary Ischemia: An Etiological Factor in Residual Facial Palsy

Abstract

The facial nerve is unique among the motor nerves. It has long and tortuous course through the temporal bone and within the Fallopian canal. Because of this it is more prone to paralysis than any other nerve in the body. The most frequent type of facial palsy is Bell's palsy. This is an acute idiopathic lower motor neuron palsy of the facial nerve which does not normally progress and which is most usually unilateral and self limiting,: the majority of cases remit within 4–6 months and nearly always remission is complete by 1 year. In those cases that do not recover it is my contention that this is caused by Either the progression, or after effects, of secondary ischemia: tertiary ischemia. In turn this causes thickening of the facial nerve sheath with a fibrous band or bands forming with resultant strangulation and compression of the nerve, which hampers its recovery. In such cases facial nerve decompression with slitting of the sheath and cutting of any fibrous bands would be the preferred management when allied with aggressive medical therapy.

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Erythematous papular rash after gardening

Clinical and Experimental Dermatology, EarlyView.

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To Evaluate the Pre and Post Shunt Sensorineural Hearing Loss in Hydrocephalus Patients

Abstract

Hydrocephalus means watery head and defined as disturbance of formation, flow, or absorption of cerebrospinal fluid. The clinical presentation of hydrocephalus includes hearing loss especially sensorineural hearing loss (SNHL). Ventriculoperitoneal (VP) shunting is the most commonly performed procedure in these patients. Pure tone audiogram, impedence and BAEPs, were done for preoperative hearing assessment in 20 hydrocephalus patients. Out of 20 patients, 12 cases (60%) had SNHL while, rest 8 (40%) patients had mixed hearing loss. Post VP shunting hearing improvement was observed in 14 patients (70%) whereas it worsened in 30% of patients. The result is even better if shunt is placed at early age.

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PD-L1 receptor expression in vulvar carcinomas is HPV-independent

Abstract

PD-L1 (programmed cell death 1 ligand) is expressed on many cancer cells and prevents tumor cell death by blocking T cell activity. PD-L1 overexpression has been reported in squamous cell carcinomas of head and neck and lung cancer. To better understand the role of PD-L1 expression in vulvar cancer, we analyzed PD-L1 expression by immunohistochemistry in 55 well-characterized squamous cell carcinomas of vulva. PD-L1 was found in 72.7% of tumors. 27.3% of vulvar carcinomas showed moderate or strong PD-L1 expression. PD-L1 expression was correlated with low tumor stage (p < 0.05). There was no association to other clinicopathological parameters, HPV status, and overall survival of vulvar carcinoma patients. In conclusion, PD-L1 overexpression is detectable in a substantial proportion of vulvar carcinomas in all stages independent of HPV and may be a suitable therapeutic target in these cancers.

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Comparison of Therapeutic Triiodothyronine Versus Metoprolol in the Treatment of Myocardial Infarction in Rats

Thyroid, Ahead of Print.

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To Evaluate the Pre and Post Shunt Sensorineural Hearing Loss in Hydrocephalus Patients

Abstract

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A mechanism of interleukin-25 production from airway epithelial cells induced by Japanese cedar pollen

Publication date: Available online 7 May 2018
Source:Clinical Immunology
Author(s): Hideaki Kouzaki, Hirotaka Kikuoka, Koji Matsumoto, Tomohisa Kato, Ichiro Tojima, Shino Shimizu, Takeshi Shimizu
IL-25 likely has vital roles in initiating and activating type-2 immune responses in AR. We hypothesized that the molecules produced IL-25 by allergen-producing organisms such as JC is involved in the pathogenesis of AR. Participants included 13 patients with Japanese cedar pollinosis and 10 HCs. We measured the IL-25 protein concentration in nasal secretions and in culture supernatants of PNECs. NHBE cells were stimulated with pharmacological and immunological agents and JC. The IL-25 concentration in nasal secretions was significantly higher in patients with Japanese cedar pollinosis than in HCs. JC stimulated IL-25 production from PNECs. TNF-α, IL-4, and IL-13 significantly enhanced JC-induced IL-25 production; their activation by serine proteases was sufficient to enhance IL-25 production. Furthermore, the NADPH oxidase activity, including JC enhanced IL-25 production. A better understanding of JC-induced IL-25 production by epithelial cells may allow the development of novel therapeutic and preventive strategies for Japanese cedar pollinosis.

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Maternal T-cell engraftment impedes with diagnosis of a SCID-ADA patient

Publication date: Available online 7 May 2018
Source:Clinical Immunology
Author(s): Arnalda Lanfranchi, Vassilios Lougaris, Lucia Dora Notarangelo, Elena Soncini, Marta Comini, Alessandra Beghin, Federica Bolda, Alessandro Montanelli, Luisa Imberti, Fulvio Porta
We describe the case of a child affected by severe combined immunodeficiency (SCID) with adenosine deaminase (ADA) deficiency showing a maternal T-cell engraftment, a finding that has never been reported before. The presence of engrafted maternal T cells was misleading. Although ADA enzymatic levels were suggestive of ADA-SCID, the child did not present the classical signs of ADA deficiency; therefore, the initial diagnosis was of a conventional SCID. However, ADA toxic metabolites and molecular characterization confirmed this diagnosis. Polyethylene glycol-modified bovine (PEG) ADA therapy progressively decreased the number of maternal engrafted T cells. The child was grafted with full bone marrow from a matched unrelated donor, after a reduced conditioning regimen, and the result was the complete immunological reconstitution.

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Isavuconazole Concentration in Real-world Practice: Consistency with Results from Clinical Trials [PublishAheadOfPrint]

Clinical use of voriconazole, posaconazole, and itraconazole revealed the need for therapeutic drug monitoring (TDM) of plasma concentrations of these antifungal agents. This need for TDM was not evident from clinical trials of these drugs. In order to establish if this requirement also applies to isavuconazole, we examined the plasma concentrations of 283 samples receiving isavuconazole in clinical practice and compared the values to those from clinical trials. The concentration distributions from real-world use and clinical trials were nearly identical (>1 μg/mL in 90% of patients). These findings suggest that routine TDM may not be required for isavuconazole in most instances.

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A systematic approach to the selection of the appropriate avibactam concentration for use with ceftazidime in broth microdilution susceptibility testing [PublishAheadOfPrint]

Selection of the avibactam concentration to combine with ceftazidime in susceptibility testing was determined using Gram-negative isolates with characterized β-lactamases predefined as "susceptible" or "resistant" based on the known inhibition spectrum of avibactam. MIC values were determined by broth microdilution of ceftazidime with fixed concentrations and ratios of avibactam. A constant concentration of 4 μg/mL of avibactam was selected for susceptibility testing with ceftazidime because of its ability to correctly categorize susceptible and resistant isolates while minimizing categorical errors.

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Amphotericin B Deoxycholate in adults with Cryptococcal Meningitis; a Population Pharmacokinetic Model and Meta-Analysis of Outcomes [PublishAheadOfPrint]

There is a limited understanding of the population pharmacokinetics (PK) and pharmacodynamics (PD) of amphotericin B deoxycholate (DAmB) for cryptococcal meningitis (CM). A PK study was conducted in n=42 patients receiving DAmB 1 mg/kg q24h. A 2-compartment PK model was developed. Patient weight influenced clearance and volume in the final structural model. Monte Carlo simulations estimated drug exposure associated with various DAmB dosages. A search was conducted for trials reporting outcomes of CM patients treated with DAmB monotherapy and a meta-analysis was performed.

The PK parameter means (standard deviation) were: clearance, 0.03 (0.01) x weight + 0.95 (0.02) litres/hour; volume, 0.89 (0.90) x weight + 1.54 (1.13) litres; first-order rate constant from central to peripheral compartment, 7.12 (6.50) hours^-1; from peripheral to central compartment, 12.13 (12.50) hours^-1. The meta-analysis suggested that DAmB dosage explained most of the heterogeneity in cerebrospinal fluid (CSF) sterility, but not in mortality outcomes. Simulations of area under concentration-time curve (AUC_144-168) resulted in median (interquartile range) values 5.83 mg.h/litre (4.66-8.55), 10.16 (8.07-14.55) and 14.51 (11.48-20.42), with dosages of 0.4, 0.7 and 1.0 mg/kg q24h respectively.

DAmB PK is described adequately by a linear model that incorporates weight on clearance and volume. Inter-patient PK variability is modest and unlikely to be responsible for variability in clinical outcome. There is a discord between the impact that drug exposure has on CSF sterility and on mortality outcomes, which may be due to cerebral pathology not reflected in CSF fungal burden, in addition to clinical variables.

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Protein Binding of First-Line Antituberculous Drugs [PublishAheadOfPrint]

Introduction: The 4-drug regimen of rifampin, isoniazid, pyrazinamide, and ethambutol is inexpensive, reliable option for treating patients with drug-susceptible tuberculosis (TB). Its efficacy could be further improved by determining the free drug concentrations in plasma, knowing that only the unbound drug can freely penetrate to the tissues.

Methods: Using an ultrafiltration technique, we determined the protein binding (PB) extent and variability of the first-line anti-TB drugs when given simultaneously to TB patients, representing a real-life case scenario. We used clinical samples routinely received by our laboratory. Plasma proteins were also measured. A protein-free medium was used to determine the nonspecific binding.

Results: Plasma samples from 22 patients were included, of which plasma proteins were measured in 18 patients. The median PB was determined for rifampin (88%, range 72 – 91), isoniazid (14%, range 0 – 34), pyrazinamide (1%, range 0 – 7), and ethambutol (12%, range 4 – 24). Plasma proteins were not found to be significant predictors for the PB of first-line anti-TB drugs. Rifampin PB was positively correlated with its plasma concentration (p-value= 0.0051). Conversely, isoniazid PB was negatively correlated with its plasma concentration (p-value= 0.0417). Age was found to have a significant effect on isoniazid PB (p-value= 0.0376). No correlations were observed in pyrazinamide or ethambutol.

Conclusion: We have determined variable PB of rifampin, isoniazid, pyrazinamide, and ethambutol in patient plasma samples, with median values of 88, 14, 1, and 12%, respectively. In this small study, PB of rifampin and isoniazid are dependent on their plasma concentrations.

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Impact of Clofazimine Dosing on Treatment-Shortening of the First-Line Regimen in a Mouse Model of Tuberculosis [PublishAheadOfPrint]

The anti-leprosy drug clofazimine was recently repurposed as part of a newly endorsed short-course regimen for multidrug-resistant tuberculosis. It also enables significant treatment-shortening when added to the first-line regimen for drug-susceptible tuberculosis in a mouse model. However, clofazimine causes dose- and duration-dependent skin discoloration in patients, and the optimal clofazimine dosing strategy in the context of the first-line regimen is unknown. We utilized a well-established mouse model to systematically address the impact of duration, dose, and companion drugs on the treatment-shortening activity of clofazimine in the first-line regimen. In all studies, the primary outcome was relapse-free cure (culture-negative lungs) six months after stopping treatment, and the secondary outcome was bactericidal activity, i.e., the decline in lung bacterial burden during treatment. Our findings indicate that clofazimine activity is most potent when co-administered with first-line drugs continuously throughout treatment, and that equivalent treatment-shortening results are obtained with half the dose commonly used in mice. However, our studies also suggest that clofazimine at low exposures may have negative impacts on treatment outcome, an effect that was only evident after the first three months of treatment. These data provide a sound evidence base to inform clofazimine dosing strategies to optimize the anti-tuberculosis effect while minimizing skin discoloration. The results also underscore the importance of conducting long-term studies to allow for the full evaluation of drugs administered in combination over long durations.

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Natamycin and Azithromycin are Synergistic in vitro against Ocular Pathogenic Aspergillus flavus species complex and Fusarium solani species complex Isolates [PublishAheadOfPrint]

The interaction of natamycin-azithromycin combination against 60 ocular fungal isolates was tested in vitro. The combination produced 100% synergistic interactions when natamycin added azithromycin at 20, 40, 50 μg/ml against Aspergillus flavus species complex (AFSC) isolates and added azithromycin at 50 μg/ml against Fusarium solani species complex isolates. The combination with 50 μg/ml azithromycin enhanced natamycin's effect against AFSC isolates by reducing natamycin MICs from MIC₉₀ 64μg/ml to MIC₉₀ 0.031μg/ml. No antagonism was observed.

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Germicidal Activity against Carbapenem/Colistin-Resistant Enterobacteriaceae Using a Quantitative Carrier Test Method [PublishAheadOfPrint]

Susceptibility to germicides for carbapenem/colistin-resistant Enterobacteriaceae is poorly described. We investigated the efficacy of multiple germicides against these emerging antibiotic-resistant pathogens using the disc-based quantitative carrier test method that can produce results more similar to those encountered in healthcare settings than a suspension test. Our study results demonstrated that germicides commonly used in healthcare facilities likely will be effective against carbapenem/colistin-resistant Enterobacteriaceae when used appropriately in healthcare facilities.

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The novel phage-derived antimicrobial agent HY-133 is active against livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) [PublishAheadOfPrint]

Livestock-associated, methicillin-resistant Staphylococcus aureus (LA-MRSA) are increasingly migrating from livestock into human and animal health care settings. Alternative substances are wanted to overcome the drawbacks of currently available drugs applied for MRSA eradication. The recombinant bacteriophage endolysin HY-133 has been proven as an active agent against S. aureus. Here, the in vitro activity of HY-133 was studied against a large collection of genetically diverse LA-MRSA revealing its high activity against mecA, mecB and mecC LA-MRSA.

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Self-Resistance During Muraymycin Biosynthesis: A Complementary Nucleotidyltransferase and Phosphotransferase with Identical Modification Sites and Distinct Temporal Order [PublishAheadOfPrint]

Muraymycins are antibacterial natural products from Streptomyces sp. that inhibit translocase I (MraY) involved in cell wall biosynthesis. Structurally, muraymycins consist of a 5'-C-glycyluridine (GlyU) that is appended with a 5''-amino-5''-deoxyribose (ADR), forming a disaccharide core that is found in several peptidyl nucleoside inhibitors of MraY. For muraymycins the GlyU-ADR disaccharide is further modified with an aminopropyl-linked peptide to generate the simplest structures annotated as the muraymycin D series. Two enzymes encoded in the muraymycin biosynthetic gene cluster, Mur29 and Mur28, were functionally assigned in vitro as a Mg⋅ATP-dependent nucleotidyltransferase and a Mg⋅ATP-dependent phosphotransferase, respectively, that both modify the 3''-OH of the disaccharide. Biochemical characterization revealed that both enzymes can utilize several nucleotide donors as co-substrates and the acceptor substrate muraymycin also behaves as an inhibitor. Single-substrate kinetic analysis revealed Mur28 preferentially phosphorylates a synthetic GlyU-ADR disaccharide, a hypothetic biosynthetic precursor of muraymycins, while Mur29 preferentially adenylates the D series of muraymycins. The adenylated or phosphorylated products have significantly reduced MraY inhibitory activity (170- and 51-fold, respectively) and reduced antibacterial activity when compared with the respective unmodified muraymycin. The results are consistent with Mur29-catalyzed adenylation and Mur28-catalyzed phosphorylation serving as complementary self-resistance mechanisms with a distinct temporal order during muraymycin biosynthesis.

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Targocil-exposure of Staphylococcus aureus Blocks Translocation of the Major Autolysin Atl Across the Membrane Resulting in a Significant Decrease in Autolysis [PublishAheadOfPrint]

Peptidoglycan and wall teichoic acid (WTA) are the major staphylococcal cell wall components, and WTA biosynthesis has recently been explored for drug development. Targocil is a novel agent that targets the TarG subunit of the WTA translocase (TarGH) that transports WTA across the membrane to the wall. Previously we showed that targocil treatment of a methicillin-susceptible Staphylococcus aureus strain led to a rapid shut down of cellular autolysis. Targocil II, which targets the TarH subunit of TarGH, also resulted in a drastic decrease in autolysis. Here we address the mechanism of targocil-mediated decreased autolysis. The mechanism is WTA-dependent as targocil-treatment decreased autolysis in methicillin-resistant strains, but not in a WTA-deficient mutant. Similar to cellular autolysis, autolysin-retaining crude cell walls isolated from targocil-treated cells had vastly decreased autolytic activity compared to those from untreated cells. Purified cell walls from control and targocil-treated cells, which lack autolytic activity, were similarly susceptible to lysozyme and lysostaphin and had similar O-acetyl contents, indicating that targocil-treatment did not grossly alter PG structure and chemistry. Purified cell walls from targocil-treated cells were highly susceptible to autolysin extracts, supporting the notion that targocil-treatment led to decreased autolysin in the crude cell walls. Quantitative real-time PCR analysis revealed that the decrease in autolysis in the targocil-exposed cells was not due to transcriptional repression of the autolysin genes atl, lytM, lytN and sle1. Zymographic analysis of peptidoglycan hydrolase profiles showed a deficiency of cell surface autolysins in targocil-treated cells, but higher activity in cell membrane fractions. Here, we propose that the untranslocated WTA molecules in the targocil-exposed cells sequester Atl at the membrane, resulting in significantly decreased autolysis.

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Failure of daptomycin to kill Staphylococcus aureus: impact of bacterial membrane fatty acid composition [PublishAheadOfPrint]

Daptomycin is a last-resort membrane-targeting lipopeptide approved for the treatment of drug-resistant staphylococcal infections such as bacteraemia and implant-related infections. Although cases of resistance to this antibiotic are rare, increasing clinical, in vitro and animal studies report treatment failure, notably against Staphylococcus aureus. The aim of this study was to identify the features of daptomycin and its target bacteria that lead to daptomycin treatment failure. We show that daptomycin bactericidal activity against S. aureus to significantly varies with the growth state and strain according to membrane fatty acid composition. Daptomycin efficacy as an antibiotic relies on its ability to oligomerize within membranes and form pores that subsequently lead to cell death. Our findings ascertain that daptomycin interacts with tolerant bacteria and reaches its membrane target, regardless of its functionality. However, the final step of pore formation does not occur in cells that are daptomycin-tolerant, strongly suggesting its incapacity to oligomerize. Importantly, membrane fatty acid contents correlated with poor daptomycin bactericidal activity, which could be manipulated by fatty acid addition. In conclusion, daptomycin failure to treat S. aureus is not due to a lack of antibiotic-target interaction but is driven by its capacity to form pores, which depends on membrane composition. Manipulation of membrane fluidity to restore S. aureus daptomycin bactericidal activity in vivo could open the way to novel strategies of antibiotic treatment.

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Oleanolic acid protects against cognitive decline and neuroinflammation-mediated neurotoxicity by blocking secretory phospholipase A2 IIA-activated calcium signals

Publication date: July 2018
Source:Molecular Immunology, Volume 99
Author(s): Leguo Zhang, Ruixue Xia, Jianpu Jia, Lixuan Wang, Kuo Li, Yanhua Li, Junling Zhang
Neuroinflammation causes neurotoxic injury and underlies the pathogenesis of neurodegenerative disorders including Alzheimer's disease (AD). Astrocytes are the predominant immunoregulatory cells in AD. Oleanolic acid (OA) is a promising anti-inflammatory therapeutic agent that can ameliorate cerebral damage in ischemic environments, but its role in AD remains poorly elucidated. Here, preconditioning with OA inhibited the transcription and secretion of inflammatory cytokines IL-6, TNF-α, and IL-1β in amyloid-beta peptide (Aβ)-activated astrocytes. Moreover, OA ameliorated primary neuron death triggered by incubation in conditioned medium from Aβ-treated astrocytes. Furthermore, OA also suppressed Aβ-induced expression and production of group IIA secretory phospholipase A2 (sPLA2-IIA) in astrocytes. Supernatants supplemented with exogenous sPLA2-IIA reversed the protective role of OA against astrocyte activation-mediated neurotoxicity by suppressing cell viability and increasing LDH release, apoptosis, the contents of neurotoxic mediator arachidonic acid, and prostaglandin D2. Simultaneously, treatment with sPLA2 inhibitor aristolochic acid also counteracted neurotoxicity induced by Aβ-activated astrocytes through increasing cell viability, inhibiting cell apoptosis, and reducing the releases of arachidonic acid and prostaglandin D2. Additionally, OA restrained Ca²⁺ influx in neurons after incubation with supernatants from Aβ-activated astrocytes, which was abrogated by adding sPLA2-IIA. Activating Ca²⁺ signaling with BayK, an L-type Ca2 + channel agonist, reversed the beneficial role of OA against neurotoxicity induced by astrocyte activation-mediated inflammatory response. OA also ameliorated cognitive deficits in an adolescent rat model of Aβ-evoked AD. These findings confirm that OA abrogates neuroinflammation and subsequent neurotoxicity induced by conditioned media from Aβ-activated astrocytes in sPLA2-IIA mediated-calcium signals. Therefore, OA may protect neurons from injury caused by neighboring astrocyte activation in AD, indicating a promising therapeutic strategy against AD.

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Immune-modulation of two BATF3 paralogues in rainbow trout Oncorhynchus mykiss

Publication date: July 2018
Source:Molecular Immunology, Volume 99
Author(s): Jun Wang, Min Liu, Yang Wu, Sohye Yoon, Abdo Alnabulsi, Fuguo Liu, Clara Fernández-Álvarez, Tiehui Wang, Jason W. Holland, Chris J. Secombes, Jun Zou
Basic leucine zipper transcription factor ATF-like (BATF) -3 is a member of the activator protein 1 (AP‑1) family of transcription factors and is known to play a vital role in regulating differentiation of antigen-presenting cells in mammals. In this study, two BATF3 homologues (termed BATF3a and BATF3b) have been identified in rainbow trout (Oncorhynchus mykiss). Both genes were constitutively expressed in tissues, with particularly high levels of BATF3a in spleen, liver, pyloric caecae and head kidney. BATF3a was also more highly induced by PAMPs and cytokines in cultured cells, with type II IFN a particularly potent inducer. In rIL-4/13 pre-stimulated cells, the viral PAMPS polyI:C and R848 had the most pronounced effect on BATF3 expression. BATF3 expression could also be modulated in vivo, following infection with Yersinia ruckeri, a bacterial pathogen causing redmouth disease in salmonids, or with the rhabdovirus IHNV. The results suggest that BATF3 may be functionally conserved in regulating the differentiation and activation of immune cells in lower vertebrates and could be explored as a potential marker for comparative investigation of leucocyte lineage commitment across the vertebrate phyla.

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Inferior turbinectomy: what is the best technique?

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Tinnitus and sound intolerance: evidence and experience of a Brazilian group

Abstract Introduction Tinnitus and sound intolerance are frequent and subjective complaints that may have an impact on a patient's quality of life. Objective To present a review of the salient points including concepts, pathophysiology, diagnosis and approach of the patient with tinnitus and sensitivity to sounds. Methods Literature review with bibliographic survey in LILACS, SciELO, Pubmed and MEDLINE database. Articles and book chapters on tinnitus and sound sensitivity were selected. The several topics were discussed by a group of Brazilian professionals and the conclusions were described. Results The prevalence of tinnitus has increased over the years, often associated with hearing loss, metabolic factors and inadequate diet. Medical evaluation should be performed carefully to guide the request of subsidiary exams. Currently available treatments range from medications to the use of sounds with specific characteristics and meditation techniques, with variable results. Conclusion A review on tinnitus and auditory sensitivity was presented, allowing the reader a broad view of the approach to these patients, based on scientific evidence and national experience.

Resumo Introdução Zumbido e intolerância a sons são queixas frequentes e subjetivas que podem ter impacto na qualidade de vida do paciente. Objetivo Apresentar uma revisão dos principais pontos, inclusive conceitos, fisiopatologia, diagnóstico e abordagem do paciente com zumbido e sensibilidade a sons. Método Revisão da literatura com levantamento bibliográfico na base de dados da LILACS, SciELO, Pubmed e MEDLINE. Foram selecionados artigos e capítulos de livros sobre zumbido e sensibilidade a sons. Os diversos tópicos foram discutidos por um grupo de profissionais brasileiros e as conclusões, descritas. Resultado A prevalência de zumbido tem aumentado ao longo dos anos, muitas vezes associado a perda auditiva, fatores metabólicos e erros alimentares. A avaliação médica deve ser feita minuciosamente no sentido de orientar a solicitação de exames subsidiários. Os tratamentos disponíveis atualmente variam de medicamentos ao uso de sons com características específicas e técnicas de meditação, com resultados variáveis. Conclusão Foi apresentada uma revisão sobre os temas que permitindo ao leitor uma visão ampla da abordagem dos pacientes com zumbido e sensibilidade auditiva baseada em evidências científicas e experiência nacional.

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The maturation state of the auditory nerve and brainstem in rats exposed to lead acetate and supplemented with ferrous sulfate

Abstract Introduction The literature has reported the association between lead and auditory effects, based on clinical and experimental studies. However, there is no consensus regarding the effects of lead in the auditory system, or its correlation with the concentration of the metal in the blood. Objective To investigate the maturation state of the auditory system, specifically the auditory nerve and brainstem, in rats exposed to lead acetate and supplemented with ferrous sulfate. Methods 30 weanling male rats (Rattus norvegicus, Wistar) were distributed into six groups of five animals each and exposed to one of two concentrations of lead acetate (100 or 400 mg/L) and supplemented with ferrous sulfate (20 mg/kg). The maturation state of the auditory nerve and brainstem was analyzed using Brainstem Auditory Evoked Potential before and after lead exposure. The concentration of lead in blood and brainstem was analyzed using Inductively Coupled Plasma-Mass Spectrometry. Results We verified that the concentration of Pb in blood and in brainstem presented a high correlation (r = 0.951; p < 0.0001). Both concentrations of lead acetate affected the maturation state of the auditory system, being the maturation slower in the regions corresponding to portion of the auditory nerve (wave I) and cochlear nuclei (wave II). The ferrous sulfate supplementation reduced significantly the concentration of lead in blood and brainstem for the group exposed to the lowest concentration of lead (100 mg/L), but not for the group exposed to the higher concentration (400 mg/L). Conclusion This study indicate that the lead acetate can have deleterious effects on the maturation of the auditory nerve and brainstem (cochlear nucleus region), as detected by the Brainstem Auditory Evoked Potentials, and the ferrous sulphate can partially amend this effect.

Resumo Introdução A literatura relatou a associação entre o chumbo e os efeitos auditivos, com base em estudos clínicos e experimentais. No entanto, não há consenso em relação aos efeitos do chumbo no sistema auditivo, ou sua correlação com a concentração do metal no sangue. Objetivo Investigar o estado de maturação do sistema auditivo, especificamente do nervo auditivo e do tronco encefálico, em ratos expostos ao acetato de chumbo e suplementados com sulfato ferroso. Método 30 ratos machos desmamados (Rattus norvegicus, Wistar) foram distribuídos em seis grupos de cinco animais e expostos a uma de duas concentrações de acetato de chumbo (100 ou 400 mg/L) e suplementados com sulfato ferroso (20 mg/kg). O estado de maturação do nervo auditivo e do tronco encefálico foi analisado pelo Potencial Evocado Auditivo do Tronco Encefálico antes e após a exposição ao chumbo. A concentração de chumbo no sangue e tronco encefálico foi analisada utilizando-se Espectrometria de Massa com Plasma Indutivamente Acoplado. Resultados Verificamos que as concentrações de Pb no sangue e no tronco encefálico apresentaram alta correlação (r = 0,951, p < 0,0001). Ambas as concentrações de acetato de chumbo afetaram o estado de maturação do sistema auditivo, a maturação foi mais lenta nas regiões correspondentes à porção do nervo auditivo (onda I) e dos núcleos cocleares (onda II). A suplementação com sulfato ferroso reduziu significativamente a concentração de chumbo no sangue e no tronco encefálico no grupo exposto à menor concentração de chumbo (100 mg/L), mas não para o grupo exposto à maior concentração (400 mg/L). Conclusão Esse estudo indica que o acetato de chumbo pode ter efeitos deletérios na maturação do nervo auditivo e do tronco encefálico (região do núcleo coclear), como detectado pelos potenciais evocados auditivos do tronco encefálico, e que o sulfato ferroso pode diminuir parcialmente esse efeito.

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Pinna synthetic mold for otoplasty techniques application

Abstract Introduction The ear deformity Tanzer type V, also known as prominent ears, is the most common genetic defect of the pinna. The surgery designed for its correction is known as otoplasty. This esthetic surgery can be performed using different techniques, which requires great skill of its operator. Objective The purpose of this work is the development of a new tool for otoplasty techniques training, aimed on the possibility to minimize errors during the otoplasty. Methods Synthetic molds of the external ear from patients with Tanzer type V deformity were made, using silicone material and rayon. Results The main procedures of otoplasty could be performed in the molds made of silicone and rayon with a good esthetic result. Conclusion The elaborated molds had identical size and shape of a human ear and could be positioned in the same shape of the patient ears. Thus, the synthetic molds were presented as promising simulation tools for the training and surgical enhancement of otoplasty, especially for doctors beginners.

Resumo Introdução A deformidade da orelha tipo V de Tanzer, também conhecida como orelhas proeminentes, é o defeito genético mais comum da aurícula. A cirurgia criada para sua correção é conhecida como otoplastia. Essa cirurgia estética pode ser feita com diferentes técnicas, o que requer grande habilidade de seu operador. Objetivo O objetivo desse trabalho é o desenvolvimento de uma nova ferramenta para o treinamento de técnicas de otoplastia, com o objetivo de minimizar erros durante a otoplastia. Método Foram feitos moldes sintéticos da orelha externa de pacientes com deformidade tipo V de Tanzer com material de silicone e rayon. Resultados Os principais procedimentos de otoplastia foram feitos nos moldes de silicone e rayon com um bom resultado estético. Conclusão Os moldes elaborados tinham tamanho e forma idênticos aos de uma orelha humana e puderam ser posicionados no mesmo formato das orelhas dos pacientes. Assim, os moldes sintéticos foram apresentados como ferramentas de simulação promissoras para o treinamento e aperfeiçoamento cirúrgico da otoplastia, especialmente para médicos iniciantes.

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Functional results in airflow improvement using a "flip-flap" alar technique: our experience

Abstract Introduction Pinched nasal point can be arising as congenital malformation or as results of unsuccessfully surgery. The nasal valve alteration due to this problem is not only an esthetic problem but also a functional one because can modify the nasal airflow. Several surgical techniques were proposed in literature, we proposed our. Objective The purpose of the study is the evaluation of nose airway flow using our flip-flap technique for correction of pinched nasal tip. Methods This is a retrospective study conducted on twelve patients. Tip cartilages were remodeled by means of autologous alar cartilage grafting. The patients underwent a rhinomanometry pre and post-surgery to evaluate the results, and they performed a self-survey to evaluate their degree of satisfaction in term of airflow sensation improvement. Results Rhinomanometry showed improved nasal air flow (range from 25% to 75%) in all patients. No significant differences were showed between unilateral and bilateral alar malformation (p = 0.49). Patient's satisfaction reached the 87.5%. Conclusion Our analysis on the combined results (rhinomanometry and surveys) showed that this technique leads to improvement of nasal flow in patients affected by pinched nasal tip in all cases.

Resumo Introdução A ponta nasal comprimida pode surgir como malformação congênita ou como o desfecho de uma cirurgia malsucedida. A alteração da válvula nasal devido a esse problema não é apenas um problema estético, mas também funcional, porque pode modificar o fluxo aéreo nasal. Várias técnicas cirúrgicas têm sido propostas na literatura; aqui, propomos a nossa. Objetivo O objetivo do estudo é a avaliação do fluxo das vias aéreas nasais utilizando nossa técnica de flip-flap para correção da ponta nasal comprimida. Métodos Este é um estudo retrospectivo realizado em doze pacientes. As cartilagens da ponta nasal foram remodeladas através de enxerto de cartilagem alar autóloga. Os pacientes foram submetidos à rinomanometria pré e pós-cirúrgica para avaliar os resultados, e realizaram uma auto-avaliação para avaliar seu grau de satisfação em termos de melhora da sensação do fluxo aéreo. Resultados e conclusão Nossa análise dos resultados combinados (rinomanometria e autoavaliação) mostrou que essa técnica melhora o fluxo nasal em pacientes afetados por ponta nasal comprimida em todos os casos. A satisfação do paciente atingiu os 87,5%.

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Role of preoperative air-bone gap in tinnitus outcome after tympanoplasty for chronic otitis media with tinnitus

Abstract Introduction Previous reports indicated that middle ear surgery might partially improve tinnitus after surgery. However, until now, no influencing factor has been determined for tinnitus outcome after middle ear surgery. Objective The purpose of this study was to investigate the association between preoperative air-bone gap and tinnitus outcome after tympanoplasty type I. Methods Seventy-five patients with tinnitus who had more than 6 months of symptoms of chronic otitis media on the ipsilateral side that were refractory to medical treatment were included in this study. All patients were evaluated through otoendoscopy, pure tone/speech audiometer, questionnaire survey using the visual analog scale and the tinnitus handicap inventory for tinnitus symptoms before and 6 months after tympanoplasty. The influence of preoperative bone conduction, preoperative air-bone-gap, and postoperative air-bone-gap on tinnitus outcome after the operation was investigated. Results and conclusion The patients were divided into two groups based on preoperative bone conduction of less than 25 dB (n = 50) or more than 25 dB (n = 25). The postoperative improvement of tinnitus in both groups showed statistical significance. Patients whose preoperative air-bone-gap was less than 15 dB showed no improvement in postoperative tinnitus using the visual analog scale (p = 0.889) and the tinnitus handicap inventory (p = 0.802). However, patients whose preoperative air-bone-gap was more than 15 dB showed statistically significant improvement in postoperative tinnitus using the visual analog scale (p < 0.01) and the tinnitus handicap inventory (p = 0.016). Postoperative change in tinnitus showed significance compared with preoperative tinnitus using visual analog scale (p = 0.006). However, the correlation between reduction in the visual analog scale score and air-bone-gap (p = 0.202) or between reduction in tinnitus handicap inventory score and air-bone-gap (p = 0.290) was not significant. We suggest that the preoperative air-bone-gap can be a predictor of tinnitus outcome after tympanoplasty in chronic otitis media with tinnitus.

Resumo Introdução Relatos anteriores indicaram que a cirurgia no ouvido médio pode melhorar parcialmente o zumbido após a cirurgia. No entanto, até agora, nenhum fator influenciador foi determinado para o resultado do zumbido após cirurgia de ouvido médio. Objetivo O objetivo deste estudo foi investigar a associação entre o gap aéreo-ósseo pré-operatório e o desfecho do zumbido após timpanoplastia do tipo I. Método Setenta e cinco pacientes com zumbido, com mais de 6 meses de sintomas de otite média crônica no lado ipsilateral que eram refratários ao tratamento médico foram incluídos nesse estudo. Todos os pacientes foram avaliados através de otoendoscopia, audiometria tonal/vocal, questionário utilizando a escala visual analógica e o questionário tinnitus handicap inventory para sintomas de zumbido antes e 6 meses após a timpanoplastia. A influência da condução óssea pré-operatória, gap aéreo-ósseo pré-operatório e pós-operatório sobre o desfecho do zumbido após a operação foi analisada. Resultados e conclusão Os pacientes foram divididos em dois grupos com base na condução óssea pré-operatória de menos de 25 dB (n = 50) ou mais de 25 dB (n = 25). A melhora do zumbido pós-operatória em ambos os grupos mostrou significância estatística. Pacientes com gap aéreo-ósseo pré-operatório inferior a 15 dB não apresentaram melhora no zumbido pós-operatório utilizando a escala visual analógica (p = 0,889) e o tinnitus handicap inventory (p = 0,802). Entretanto, pacientes com gap aéreo-ósseo pré-operatório maior do que 15 dB apresentaram melhoria estatisticamente significante no zumbido pós-operatório com a escala visual analógica (p < 0,01) e o tinnitus handicap inventory (p = 0,016). A mudança pós-operatória no zumbido mostrou significância em comparação com o zumbido pré-operatório usando a escala visual analógica (p = 0,006). No entanto, a correlação entre a redução no escore da escala visual analógica e gap aéreo-ósseo (p = 0,202) ou entre a redução no escore do tinnitus handicap inventory e gapaéreo-ósseo (p = 0,290) não foi significativa. Sugerimos que o gapaéreo-ósseo pré-operatório possa ser um preditor de desfecho do zumbido após timpanoplastia em otite média crônica com zumbido.

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Sleep disorders in children with moderate to severe persistent allergic rhinitis

Abstract Introduction Allergic rhinitis is associated with several complications, including sleep disorders. The Children's Sleep Habits Questionnaire has been recently translated and validated in Portuguese for the evaluation of sleep disorders in children. Objective To assess sleep disorders in children with moderate to severe persistent allergic rhinitis and to correlate the findings with disease severity markers. Methods We evaluated 167 children (4-10 years), 112 with allergic rhinitis and 55 controls. Parents/guardians of the children answered the Children's Sleep Habits Questionnaire, consisting of 33 questions divided into eight subscales, which refers to the previous week. Patients with rhinitis were also evaluated regarding the score of nasal and extra-nasal symptoms related to the previous week and the peak nasal inspiratory flow. Results There were no significant differences between groups of different age. All patients with rhinitis were being treated with nasal topical corticosteroids. The total Children's Sleep Habits Questionnaire score was significantly higher among children with rhinitis than in controls (median 48 vs. 43, p < 0.001). Significantly higher values were also observed for the parasomnia (9 vs. 8), respiratory disorders (4 vs. 3) and daytime sleepiness (14 vs. 12) subscales. Among the patients with rhinitis, no significant correlation was observed between the total Children's Sleep Habits Questionnaire score and disease activity variables, but moderate correlations were observed for the respiratory distress subscale vs. nasal symptom score (r = 0.32) and vs. extra-nasal symptom score (r = 0.32). Conclusion Children with moderate to severe persistent allergic rhinitis, even when submitted to regular treatment, have a higher frequency of sleep disorders than controls, particularly concerning nocturnal breathing disorders, daytime sleepiness, and parasomnias. The intensity of sleep disorders found in some subscales was correlated with objective markers of allergic rhinitis severity.

Resumo Introdução A rinite alérgica está associada a diversas complicações, como, por exemplo, os distúrbios do sono. O Children's Sleep Habits Questionnaire é um questionário para avaliação dos distúrbios do sono em crianças, recentemente traduzido e validado para o português. Objetivos Avaliar distúrbios do sono em crianças com rinite alérgica persistente moderada/grave e correlacionar os achados com marcadores de gravidade da doença. Método Foram avaliadas 167 crianças (4-10 anos), 112 com rinite alérgica e 55 controles. Todos os responsáveis pelas crianças responderam o questionário, composto por 33 questões dividas em oito subescalas e referentes à última semana. Os pacientes com rinite foram avaliados também pelo escore de sintomas nasais e extranasais referentes à última semana e pelo pico de fluxo inspiratório nasal. Resultados Não houve diferenças significantes entre os grupos com relação à idade. Todos os pacientes com rinite eram tratados com corticosteroide tópico nasal. O escore total do questionário foi significantemente maior entre os com rinite do que entre os controles (mediana 48 vs. 43; p < 0,001). Valores significantemente maiores também foram observados para as subescalas de parassonias (9 vs. 8), distúrbios respiratórios (4 vs. 3) e sonolência diurna (14 vs. 12). Entre os pacientes com rinite não foi observada correlação significante entre o escore total do questionário e as variáveis de atividade da doença, porém correlações moderadas foram observadas para a subescala de distúrbios respiratórios vs. escore de sintomas nasais (r = 0,32) e vs. escore de sintomas extranasais (r = 0,32). Conclusões Crianças com rinite alérgica persistente moderada-grave, mesmo em tratamento regular, apresentam maior frequência de distúrbios do sono do que controles, particularmente em relação aos distúrbios respiratórios noturnos, à sonolência diurna e às parassonias. A intensidade das alterações do sono encontradas em algumas subescalas se correlacionou com marcadores objetivos de gravidade da rinite alérgica.

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The effect of different nasal irrigation solutions following septoplasty and concha radiofrequency: a prospective randomized study

Abstract Introduction Nasal irrigation solutions are widely used following endonasal surgery. These irrigation solutions remove infective debris and crusts, reducing the probability of synechia formation, and accelerate mucosal healing. Objective The aim of the present study was to compare the effects of nasal irrigation solutions with different contents following septoplasty and concha radiofrequency. Methods The present study was a prospective, randomized, controlled simple blind study of 120 patients who underwent septoplasty and bilateral concha radiofrequency. Patients were divided into four groups according to the nasal irrigation solution used: tap water, buffered isotonic saline, saline with xylitol, and hypertonic sea water. Patients were examined on the 7th and 15th postoperative days. A saccharine test was applied to determine mucociliary activity preoperatively and on the 7th and 15th postoperative days. Patients were asked about drying and obstruction using a 10 cm visual analog scale. In addition, patients were examined to determine the crusting score. Results There was no significant difference found in the preoperative and 7th and 15th postoperative days' mucociliary clearance times among the four groups. The crusting score was found to be significantly lower in the hypertonic sea water group (p < 0.001). Drying and obstruction on the 7th and 15th postoperative days were found to be significantly more comfortable in the hypertonic sea water group (p < 0.001). Conclusion Hypertonic sea water is the recommended irrigation solution, as it is associated with less crusting, drying, and obstruction in the nose for the postoperative period following septoplasty and concha radiofrequency.

Resumo Introdução Soluções para irrigação nasal são amplamente usadas após cirurgias endonasais. Essas soluções removem os resíduos e crostas, reduzem a probabilidade de formação de sinéquias e aceleram a cicatrização da mucosa. Objetivo O objetivo do presente estudo foi comparar os efeitos das soluçoes para irrigaçao nasal com diferentes conteudos apos septoplastia e turbinoplastia com radiofrequencia. Método O presente estudo foi um estudo cego simples, randomizado, controlado e prospectivo de 120 pacientes submetidos a septoplastia e turbinoplastia bilateral com radiofrequencia. Os pacientes foram divididos em quatro grupos de acordo com a soluçao nasal utilizada: agua da torneira, soluçao salina isotonica tamponada, soluçao salina com xilitol e agua do mar hipertonica. Os pacientes foram examinados no 7° e 15° dias do pos-operatorio. O teste de sacarina foi utilizado para determinar a atividade mucociliar pre-operatoria e no 7° e 15° dias do pos-operatorio. Os pacientes foram questionados sobre a sensaçao de secura e obstruçao nasais utilizando uma escala visual analógica de 10 cm. Alem disso, os pacientes foram examinados para determinar o escore em relaçao a crostas. Resultados Não houve diferença significativa entre o pré-operatório e o sétimo e 15° dias do pós-operatório dos tempos de clearance mucociliar entre os quatro grupos. Verificou-se que o escore em relação a crostas foi significativamente menor no grupo que usou água do mar hipertônica (p < 0,001). As sensações de secura e obstrução nasais no sétimo e 15° dias do pós-operatório mostraram-se significativamente mais confortáveis no grupo água do mar hipertônica (p < 0,001). Conclusão A água de mar hipertônica é a solução de irrigação recomendada, pois está associada a menor incidência de crostas, secura e obstrução nasais no pós-operatório de cirurgia de septoplastia e das conchas nasais com radiofrequência.

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Influence of dietary and physical activity restriction on pediatric adenotonsillectomy postoperative care in Brazil: a randomized clinical trial

Abstract Introduction Although culturally food and physical activity restriction are part of the routine postoperative care of many Brazilian surgeons, current evidences from other countries support no such recommendations. Objective To determine whether dietary and physical restriction effectively lead to a decrease on postoperative complications of adenotonsillectomy in children when compared to no restriction. Methods We have designed a randomized clinical trial comparing two intervention: no specific counseling on diet or activity (Group A), and restriction recommendations on diet and physical activities (Group B). Caregivers completed a questionnaire on observed pain, diet and activity patterns, and medications administered. Parameters were compared at the 3rd and at the 7th postoperative day between intervention groups. Results We have enrolled a total of 95 patients, 50 in Group A and 45 in Group B. Fourteen patients were lost to follow up. Eventually, 41 patients in group A and 40 in Group B were available for final analysis. Mean age in months (A = 79.5; SD = 33.9/B = 81.1; SD = 32.6) and sex (A = 58% male; B = 64.4% male) were equivalent between groups. Pain, evaluated through visual analog scale in the 3rd (A = 2.0; IQR 1-6/B = 4.5; IQR 2-6; p = 0.18) and in the 7th (A = 1.0; IQR 1.0-4.5/B = 2.0; IQR 1.0-4.7; p = 0.29) postoperative days, was not different between groups, as was the amount of analgesics administered. Dietary and physical activity patterns also showed no statistically significant differences between groups. Conclusion Dietary and activity restriction after adenotonsillectomy does not seem to affect patients' recovery. Such information may impact considerably on the social aspects that involve a tonsillectomy, reducing the working days lost by parents and accelerating the return of children to school.

Resumo Introdução Embora culturalmente as restrições dietéticas e de atividade física sejam parte do cuidado pós-operatório de rotina de muitos cirurgiões brasileiros, evidências atuais de outros países não apoiam tais recomendações. Objetivo Determinar se as restrições dietéticas e físicas efetivamente levam a uma diminuição das complicações pós-operatórias da adenotonsilectomia em crianças quando comparadas com cuidados sem restrição. Método Realizamos um ensaio clínico randomizado comparando duas intervenções: nenhum aconselhamento específico sobre dieta ou atividade física (Grupo A) e recomendações de restrições dietéticas e de atividades físicas (Grupo B). Os cuidadores preencheram um questionário sobre a dor, a dieta e os padrões de atividade observados, e os medicamentos administrados. Os parâmetros foram comparados no 3° e no 7° dia do pós-operatório entre os grupos de intervenção. Resultados Avaliamos 95 pacientes, 50 no Grupo A e 45 no Grupo B; 14 foram perdidos no seguimento. Subsequentemente, 41 do grupo A e 40 do grupo B estavam disponíveis para a análise final. A média de idade em meses (A = 79,5, DP = 33,9/B = 81,1, DP = 32,6) e sexo (A = 58% do sexo masculino, B = 64,4% do sexo masculino) foram equivalentes entre os grupos. A dor, avaliada através da escala visual analógica no terceiro (A = 2,0; IIQ: 1-6/B = 4,5; IIR 2-6; p = 0,18) e no sétimo (A = 1,0; IIQ 1,0-4,5/B = 2,0; IIQR 1,0-4,7; p = 0,29) dia do pós-operatório, não foi diferente entre os grupos, assim como a quantidade de analgésicos administrados. Os padrões dietéticos e de atividade física também não mostraram diferenças estatisticamente significantes entre os grupos. Conclusão A restrição dietética e de atividade física após a adenotonsilectomia não parece afetar a recuperação dos pacientes. Tal informação pode ter um impacto considerável nos aspectos sociais que envolvem uma tonsilectomia, reduzir os dias de trabalho perdidos pelos pais e acelerar o retorno das crianças à escola.

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Rapid maxillary expansion in mouth breathers: a short-term skeletal and soft-tissue effect on the nose

Abstract Introduction Rapid maxillary expansion can change the form and function of the nose. The skeletal and soft tissue changes can influence the esthetics and the stability of the results obtained by the procedure. Objective The aim of this retrospective study was to evaluate the short-term effects of rapid maxillary expansion on the skeletal and soft tissue structures of the nose, in mouth-breathing patients, using a reliable and reproducible, but simple methodology, with the aid of computed tomography. Methods A total of 55 mouth-breathing patients with maxillary hypoplasia were assessed and were divided into an experimental group treated with rapid maxillary expansion(39 patients, 23 of which were male and 16 female, with an average age of 9.7 years and a standard deviation of 2.28, ranging from 6.5 to 14.7 years) and a control group (16 patients, 9 of which were male and 7 female, with an average age of 8.8 years, standard deviation of 2.17, ranging from 5.11 to 13.7 years). The patients of the experimental group were submitted to multislice computed tomography examinations at two different points in time: (T1) pre-rapid maxillary expansion and (T2) three months after the procedure. The control group underwent to the same exams at the same intervals of time. Four skeletal and soft tissue variables were assessed, comparing the results of T1 and T2. Results There was in the experimental group a significant increases in all the skeletal and soft tissue variables (p < 0.05) but no significant alteration was found in the control group. When comparing the experimental group and the control group, the most important change occurred in the width of the pyriform aperture (p < 0.001). Conclusion Rapid maxillary expansion is capable of altering the shape and function of the nose, promoting alterations in skeletal and soft tissue structures. This kind of study may, in the future, permit the proper planning of esthetic procedures at the tip and base of the nose and also the performance of objective measurements in early or late surgical outcomes.

Resumo Introdução A expansão rápida da maxila pode alterar a forma e a função do nariz. As alterações do esqueleto e dos tecidos moles podem influenciar a estética e a estabilidade dos resultados obtidos através deste procedimento. Objetivo Avaliar, em curto prazo, os efeitos da expansão rápida da maxila sobre as estruturas esqueléticas e tegumentares do nariz em pacientes respiradores orais por meio de uma metodologia confiável e reprodutível, porém simples, com a ajuda da tomografia computadorizada. Método Foram avaliados 55 pacientes respiradores orais com hipoplasia maxilar que foram divididos em grupo experimental tratado com expansão rápida da maxila (39, 23 do sexo masculino e 16 do feminino, com média de 9,7 anos e desvio padrão de 2,28, variação de 6,5 a 14,7 anos) e um grupo controle (16 pacientes, nove do sexo masculino e sete do feminino, com média de 8,8 anos, desvio padrão de 2,17, variação de 5,11-13,7 anos). Os pacientes do grupo experimental foram submetidos a exames de tomografia computadorizada multislice em dois tempos distintos: (T1) pré-expansão rápida da maxila e (T2) três meses após o procedimento. O grupo controle foi submetido aos mesmos exames nos mesmos intervalos de tempo. Foram avaliadas quatro variáveis esqueléticas e quatro tegumentares comparando-se os resultados de T1 e T2. Resultados O grupo experimental apresentou aumentos significativos em todas as variáveis esqueléticas e tegumentares (p < 0,05), mas não houve alterações significativas no grupo controle. Ao compararem-se o grupo experimental e o grupo controle, foi observado que a alteração mais importante ocorreu na largura da abertura piriforme (p < 0,001). Conclusão A expansão rápida da maxila é capaz de alterar a forma e a função do nariz, promove alterações nas estruturas esqueléticas e dos tecidos moles. Esse tipo de estudo pode, no futuro, permitir o planejamento adequado de procedimentos estéticos na ponta e base do nariz e também a feitura de medidas objetivas em resultados cirúrgicos iniciais ou tardios.

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Anti-inflammatory effects of hyperbaric oxygen on irradiated laryngeal tissues

Abstract Introduction To manage the complications of irradiation of head and neck tissue is a challenging issue for the otolaryngologist. Definitive treatment of these complications is still controversial. Recently, hyperbaric oxygen therapy is promising option for these complications. Objective In this study, we used biochemical and histopathological methods to investigate the efficacy of hyperbaric oxygen against the inflammatory effects of radiotherapy in blood and laryngeal tissues when radiotherapy and hyperbaric oxygen are administered on the same day. Methods Thirty-two Wistar Albino rats were divided into four groups. The control group was given no treatment, the hyperbaric oxygen group was given only hyperbaric oxygen therapy, the radiotherapy group was given only radiotherapy, and the radiotherapy plus hyperbaric oxygen group was given both treatments on the same day. Results Histopathological and biochemical evaluations of specimens were performed. Serum tumor necrosis factor-α, interleukin-1β, and tissue inflammation levels were significantly higher in the radiotherapy group than in the radiotherapy plus hyperbaric oxygen group, whereas interleukin-10 was higher in the radiotherapy plus hyperbaric oxygen group. Conclusion When radiotherapy and hyperbaric oxygen are administered on the same day, inflammatory cytokines and tissue inflammation can be reduced in an early period of radiation injury.

Resumo Introdução O manejo das complicações da irradiação do tecido da cabeça e pescoço é uma questão desafiadora para o otorrinolaringologista. O tratamento definitivo dessas complicações ainda é controverso. Recentemente, a oxigenoterapia hiperbárica tem sido uma opção promissora para essas complicações. Objetivo Nesse estudo foram usados métodos bioquímicos e histopatológicos para investigar a eficácia do oxigênio hiperbárico contra os efeitos inflamatórios da radioterapia no sangue e nos tecidos laríngeos, quando a radioterapia e oxigênio hiperbárico são administrados no mesmo dia. Métodos Trinta e dois ratos Wistar albinos foram divididos em quatro grupos. O grupo controle nao recebeu tratamento, o grupo de oxigenio hiperbarico recebeu apenas oxigenoterapia hiperbarica, o grupo de radioterapia recebeu apenas radioterapia e o grupo de radioterapia com oxigenio hiperbarico recebeu ambos os tratamentos no mesmo dia. Resultados Foram realizadas avaliaçoes histopatologicas e bioquimicas dos especimes. Os niveis sericos de fator de necrose tumoral-α, interleucina-1β e inflamaçao tecidual foram significativamente maiores no grupo de radioterapia do que no grupo de radioterapia mais oxigenio hiperbarico, enquanto que a interleucina-10 foi maior no grupo de radioterapia mais oxigenio hiperbarico. Conclusão Quando a radioterapia e o oxigênio hiperbárico são administrados no mesmo dia, as citocinas inflamatórias e a inflamação tecidual podem ser reduzidas no período inicial da radiação.

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Digital design of functional surgery for odontogenic cyst intruding into maxillary sinus

Abstract Introduction Traditional Caldwell-Luc approach needs modifications for odontogenic cysts intruding into the maxillary sinus, to preserve sinus mucosa and bony contour. Recently, digital technology has been widely applied to the field of maxillofacial surgery, guiding the surgical plan and improving its accuracy. Objective This study attempted to present and evaluate the functional surgery of odontogenic cysts intruding into the maxillary sinus using a computer-assisted pre-surgical design. Methods Consecutive patients with odontogenic cysts intruding into the posterior part of the maxillary sinus were enrolled. Method I "Bony wall reimplantation method" was performed for large lesions exceeding the zygomatic alveolar crest but without apparent bone destruction of the anterior wall of the sinus, while Method II "bone removal method" was more convenient for small lesions near to the zygomatic alveolar crest. The gap was filled with a pedicled buccal fat pad after lesion removal and all cases were without inferior meatal antrostomy. Results A total of 45 cases were included in the study. 22 were operated using method I while 23 were operated with method II. Operations were completed in 20 min. Pain disappeared in 3.62 days on average, and swelling 6.47 days. Nasal bleeding occurred in 8 patients lasting 1-3 days. Suppurative inflammation was observed in 1 patient, and infection occurred after bone reposition. Other repositioned free bony wall was without resorption in CT images. Conclusions Sinus mucosa and bony wall should be conserved. Preoperative digital design can guide osteotomy effectively during the surgery. Bone reposition is not suitable for suppurative inflammation. The pedicled buccal fat pad is enough for drainage and inferior meatal antrostomy is not necessary.

Resumo Introdução A abordagem tradicional de Caldwell-Luc precisa de modificações para os cistos odontogênicos que se introduzem no seio maxilar, para preservar a mucosa sinusal e o contorno ósseo. Recentemente, a tecnologia digital tem sido amplamente aplicada ao campo da cirurgia maxilofacial, orienta o plano cirúrgico e melhora sua precisão. Objetivo Esse estudo teve como objetivo apresentar e avaliar a cirurgia funcional de cistos odontogênicos intrusivos no seio maxilar utilizando um desenho pré-cirúrgico assistido por computador. Método Foram recrutados pacientes consecutivos com cistos odontogênicos intrusivos na parte posterior do seio maxilar. O método I, "método de reimplante de parede óssea", foi feito em lesões grandes que excediam a crista zigomático-alveolar, mas sem destruição óssea aparente da parede anterior do seio, enquanto o método II, "método de remoção óssea", foi mais conveniente para pequenas lesões próximas à crista zigomático-alveolar. O espaço foi preenchido com um retalho pediculado do corpo adiposo bucal após a remoção da lesão e todos os casos foram feitos sem antrostomia meatal inferior. Resultados Um total de 45 casos foram incluídos no estudo. Vinte e dois foram submetidos à cirurgia utilizando-se o método I, enquanto que 23 foram submetidos ao método II. As operações foram concluídas em 20 minutos. A dor desapareceu em média após 3,62 dias, e o edema, depois de 6,47 dias. Hemorragia nasal ocorreu em 8 pacientes com duração de 1 a 3 dias. Processo supurativa foi observado em 1 paciente ocorrendo após a reposição óssea. Outros retalhos reposicionados livres da parede óssea não mostraram reabsorção em imagens de TC. Conclusões A mucosa sinusal e a parede óssea devem ser preservadas; o desenho digital pré-operatório pode orientar a osteotomia de forma eficaz durante a cirurgia; a reposição óssea não é adequada em processos supurativos. O retalho pediculado de corpo adiposo bucal é suficiente para a drenagem e antrostomia meatal inferior não é necessária.

https://ift.tt/2FU1x3D

Impact of body mass index on survival outcome in patients with differentiated thyroid cancer

Abstract Introduction Increased body mass index is known to be associated with the high prevalence of differentiated thyroid cancers; however data on its impact on survival outcome after thyroidectomy and adjuvant therapy is scanty. Objective We aimed to evaluate the impact of body mass index on overall survival and disease free survival rates in patients with differentiated thyroid cancers. Methods Between 2000 and 2011, 209 patients with differentiated thyroid cancers (papillary, follicular, hurthle cell) were treated with thyroidectomy followed by adjuvant radioactive iodine-131 therapy and thyroid-stimulating hormone suppression. Based on body mass index, patients were divided into five groups; (a) <18.5 kg/m2 (underweight); (b) 18.5-25 kg/m2 (normal weight); (c) 26-30 kg/m2 (overweight); (d) 31-40 kg/m2 (obese) and (e) >40 kg/m2 (morbid obese). Various demographic, clinical and treatment characteristics and related toxicity and outcomes (overall survival, and disease free survival) were analyzed and compared. Results Median follow up period was 5.2 years (0.6-10). Mean body mass index was 31.3 kg/m2 (17-72); body mass index 31-40 kg/m2 was predominant (89 patients, 42.6%) followed by 26-30 kg/m2 seen in 58 patients (27.8%). A total of 18 locoregional recurrences (8.6%) and 12 distant metastasis (5.7%) were seen. The 10 year disease free survival and overall survival rates were 83.1% and 58.0% respectively. No significant impact of body mass index on overall survival or disease free survival rates was found (p = 0.081). Similarly, multivariate analysis showed that body mass index was not an independent prognostic factor for overall survival and disease free survival. Conclusion Although body mass index can increase the risk of thyroid cancer, it has no impact on treatment outcome; however, further trials are warranted.

Resumo Introdução Sabe-se que o aumento do índice de massa corpórea está associado à alta prevalência de câncer diferenciado de tireoide; entretanto, os dados sobre seu impacto no desfecho de sobrevivência após tireoidectomia e terapia adjuvante são escassos. Objetivo Objetivou-se avaliar o impacto do índice de massa corpórea nas taxas de sobrevida global e sobrevida livre de doença em pacientes com câncer diferenciado de tireoide. Método Entre 2000 e 2011, 209 pacientes com câncer diferenciado de tireoide (papilar/folicular/de células de Hurthle) foram tratados através de tireoidectomia, seguida de tratamento com iodo radioativo-131 adjuvante e supressão de hormônio estimulante da tireoide. Com base no índice de massa corpórea, os pacientes foram divididos em cinco grupos; (a) < 18,5 kg/m2 (baixo peso); (b) 18,5-25 kg/m2 (peso normal); (c) 26-30 kg/m2 (sobrepeso); (d) 31-40 kg/m2 (obesos) e (e) > 40 kg/m2 (obesos mórbidos). Várias características demográficas, clínicas e de tratamento e toxicidade associada e desfechos (sobrevida global e sobrevida livre de doença) foram analisadas e comparadas. Resultados O período médio de acompanhamento foi de 5,2 anos (0,6-10). O índice de massa corpórea médio foi de 31,3 kg/m2 (17-72); o índice de massa corpórea de 31-40 kg/m2 foi predominante (89 pacientes, 42,6%), seguido por 26-30 kg/m2, observado em 58 pacientes (27,8%). Observaram-se 18 recidivas locorregionais (8,6%) e 12 metástases distantes (5,7%). As taxas de sobrevida livre de doença e sobrevida global de 10 anos foram de 83,1% e 58,0%, respectivamente. Não foi encontrado impacto significativo do índice de massa corpórea nas taxas de sobrevida global ou sobrevida livre de doença (p = 0,081). Da mesma forma, a análise multivariada mostrou que o índice de massa corpórea não foi um fator prognóstico independente para sobrevida global e sobrevida livre de doença. Conclusão Embora o índice de massa corpórea possa aumentar o risco de câncer de tireoide, ele não tem impacto no resultado do tratamento; contudo, outros estudos são necessários.

https://ift.tt/2KKqZvV

A novel method to evaluate salivary flow rates of head and neck cancer patients after radiotherapy: a pilot study

Abstract Introduction The procedure used to evaluate salivary flow rate is called sialometry. It can be performed through several techniques, but none appears to be really efficient for post-radiotherapy patients. Objective To adequate sialometry tests for head and neck cancer patients submitted to radiotherapy. Methods 22 xerostomic patients post-radiotherapy (total radiation dose ranging from 60 to 70 Gy) were included in this study. Ten patients were evaluated using sialometries originally proposed by the Radiation Therapy Oncology Group and twelve were assessed by our modified methods. Unstimulated and stimulated sialometries were performed and the results were classified according a grading scale and compared between both groups. Results There was no statistically significant difference between the salivary evaluations of both groups (p = 0.4487 and p = 0.5615). Also, most of these rates were classified as very low and low. Conclusion This novel method seems to be suitable for patients submitted to radiotherapy.

Resumo Introdução O procedimento utilizado para avaliar a taxa de fluxo salivar é denominado sialometria. Pode ser realizado por meio de várias técnicas, mas nenhuma parece ser realmente eficiente para pacientes pós-radioterapia. Objetivo Adaptar sialometrias para pacientes com câncer de cabeça e pescoço submetidos à radioterapia. Método 22 pacientes xerostômicos pós-radioterapia (dose de radiação total variando de 60-70 Gy) foram incluídos neste estudo. Dez pacientes foram avaliados utilizando sialometrias originalmente propostas pelo Radiation Therapy Oncology Group e doze foram avaliados por nossos métodos modificados. Sialometrias não estimuladas e estimuladas foram conduzidas e os resultados foram classificados de acordo com uma escala de graduação e comparados entre os dois grupos. Resultados Não houve diferença estatisticamente significante entre as avaliações salivares de ambos os grupos (p = 0,4487 e p = 0,5615). Além disso, a maioria dessas taxas foi classificada como muito baixa e baixa. Conclusão Esse novo método parece ser adequado para pacientes submetidos à radioterapia.

https://ift.tt/2FSFHNK

Giant fronto-ethmoidal osteoma - selection of an optimal surgical procedure

Abstract Introduction Osteomas of the paranasal sinuses are benign bone tumours that produce clinical signs depending on their size and location. In most reported cases large tumours are excised by an external approach or in conjunction with an endoscopic technique. Endoscopic treatment of such tumours is a huge challenge for the operator. Objective Determine the optimal surgical approach by analysing giant osteomas of the frontal and ethmoidal sinuses in the literature. Methods Group of 37 osteomas obtained from the literature review. A group of osteomas removed only by endoscopy was compared with a group in which an external approach (lateral rhynotomy or craniotomy) or combined external and endoscopic approach was applied. Results The authors, based on the statistical analysis of the literature data, have found that the average size of osteomas excised endoscopically and those removed by external approaches does not differ statistically, when the osteomas are located in the ethmoidal cells (p = 0.2691) and the frontal sinuses (p = 0.5891). Conclusion The choice of surgical method appears to be independent of the osteoma size and the decision is likely to be taken based on the experience of the surgeon, available equipment and knowledge of different surgical techniques.

Resumo Introdução Osteomas dos seios paranasais são tumores ósseos benignos cujas manifestações clínicas ocorrem em função de seu tamanho e localização. Na maioria dos casos relatados os tumores grandes são excisados por uma abordagem externa ou associada a uma técnica endoscópica. O tratamento endoscópico destes tumores ainda é um grande desafio para o cirurgião. Objetivo Determinar a abordagem cirúrgica ideal ao analisar osteomas gigantes dos seios frontal e etmoidal na literatura. Método Um total de 38 osteomas foram avaliados a partir da revisão da literatura. Um grupo de osteomas removidos apenas por cirurgia endoscópica foi comparado com um grupo para o qual foi utilizado uma abordagem externa (rinotomia lateral ou craniotomia) ou uma abordagem combinada, externa e endoscópica. Resultados Os autores, com base na análise estatística dos dados da literatura, observaram que o tamanho médio dos osteomas excisados endoscopicamente e daqueles que foram removidos através de uma abordagem externa não diferiram estatisticamente, tanto para osteomas localizados no seio etmoidal (p = 0.2691) quanto para os localizados no seio frontal (p = 0.5891). Conclusão A escolha do método cirúrgico parece ser independente do tamanho do osteoma e a decisão provavelmente será tomada com base na experiência prévia do cirurgião, nos equipamentos disponíveis e conhecimento de diferentes técnicas cirúrgicas.

https://ift.tt/2jDVYNW

Biofeedback in dysphonia - progress and challenges

Abstract Introduction There is evidence that all the complex machinery involved in speech acts along with the auditory system, and their adjustments can be altered. Objective To present the evidence of biofeedback application for treatment of vocal disorders, emphasizing the muscle tension dysphonia. Methods A systematic review was conducted in Scielo, Lilacs, PubMed and Web of Sciences databases, using the combination of descriptors, and admitting as inclusion criteria: articles published in journals with editorial committee, reporting cases or experimental or quasi-experimental research on the use of biofeedback in real time as additional source of treatment monitoring of muscle tension dysphonia or for vocal training. Results Thirty-three articles were identified in databases, and seven were included in the qualitative synthesis. The beginning of electromyographic biofeedback studies applied to speech therapy were promising and pointed to a new method that enabled good results in muscle tension dysphonia. Nonetheless, the discussion of the results lacked physiological evidence that could serve as their basis. The search for such explanations has become a challenge for speech therapists, and determined two research lines: one dedicated to the improvement of the electromyographic biofeedback methodology for voice disorders, to reduce confounding variables, and the other dedicated to the research of neural processes involved in changing the muscle engram of normal and dysphonic patients. Conclusion There is evidence that the electromyographic biofeedback promotes changes in the neural networks responsible for speech, and can change behavior for vocal emissions with quality.

Resumo Introdução Há evidências de que o complexo aparato envolvido no ato da fala, juntamente com o sistema auditivo, e seus ajustes podem ser alterados. Objetivo Apresentar evidências da aplicação de biofeedback (biorretroalimentação) para tratamento de distúrbios vocais, enfatizar a disfonia de tensão muscular. Método Realizou-se uma revisão sistemática nas bases de dados de Scielo, Lilacs, PubMed e Web of Sciences, utilizando a combinação de descritores e admitindo como critérios de inclusão: artigos publicados em revistas com comitê editorial, relatos de casos ou pesquisas experimentais ou quase experimentais sobre o uso debiofeedbackem tempo real como fonte adicional de monitoração de tratamento de disfonia de tensão muscular ou para treinamento vocal. Resultados Trinta e três artigos foram identificados em bases de dados, e sete foram incluídos na síntese qualitativa. O início dos estudos de biofeedbackeletromiográficos aplicados à terapia fonoaudiológica foram promissores e indicaram um novo método que permitiu bons resultados na disfonia de tensão muscular. No entanto, a discussão dos resultados carecia de evidências fisiológicas que pudessem servir de base. A busca por tais explicações tornou-se um desafio para os fonoaudiólogos e determinou duas linhas de pesquisa: uma dedicada à melhoria da metodologia de biofeedbackeletromiográfico para distúrbios da voz, para reduzir as variáveis de confusão e outra dedicada à pesquisa de processos neurais envolvidos na alteração do engrama muscular de pacientes normais e disfônicos. Conclusão Há evidências de que o biofeedback eletromiográfico promove mudanças nas redes neurais responsáveis pela fala e pode mudar o comportamento para emissões vocais com qualidade.

https://ift.tt/2FSPSSR

Acquired stenosis of external auditory canal secondary to paraneoplastic manifestation of renal cancer

Chorda tympani schwannoma: one new case revealed during malignant otitis externa and review of the literature

Prevention of neck infection by endoscopic suture closure of pyriform sinus fistulae: a report of two cases

Endoscopic surgery of the frontoethmoidal osteomas

Cochineal dye-induced immediate allergy: Review of Japanese cases and proposed new diagnostic chart

Publication date: Available online 26 April 2018
Source:Allergology International
Author(s): Naoko Takeo, Masashi Nakamura, Satoshi Nakayama, Osamu Okamoto, Naoki Sugimoto, Shinichi Sugiura, Nayu Sato, Susumu Harada, Masao Yamaguchi, Naoya Mitsui, Yumiko Kubota, Kayoko Suzuki, Makoto Terada, Akiyo Nagai, Junko Sowa-Osako, Yutaka Hatano, Hiroshi Akiyama, Akiko Yagami, Sakuhei Fujiwara, Kayoko Matsunaga
BackgroundCochineal dye is used worldwide as a red coloring in foods, drinks, cosmetics, quasi-drugs, and drugs. The main component of the red color is carminic acid (CA). Carmine is an aluminum- or calcium-chelated product of CA. CA and carmine usually contain contaminating proteins, including a 38-kDa protein thought to be the primary allergen. Severe allergic reactions manifest as anaphylaxis. The aim of this study was to review all Japanese reported cases and propose useful diagnostic chart.MethodsAll reported Japanese cases of cochineal dye-induced immediate allergy were reviewed, and newly registered cases were examined by skin prick test (SPT) with cochineal extract (CE) and measurement of CE and carmine-specific serum IgE test. Two-dimensional (2D) western blotting using patient serum was conducted to identify the antigen.ResultsTwenty-two Japanese cases have been reported. SPT and the level of specific IgE test indicated that six cases should be newly registered as cochineal dye allergy. All cases were adult females, and all cases except three involved anaphylaxis; 13 cases involved past history of local symptoms associated with cosmetics use. Japanese strawberry juice and fish-meat sausage, and European processed foods (especially macarons made in France) and drinks were recent major sources of allergen. 2D western blotting showed that patient IgE reacted to the 38-kDa protein and other proteins. Serum from healthy controls also weakly reacted with these proteins.ConclusionsSPT with CE and determination of the level of CE and carmine-specific IgE test are useful methods for the diagnosis of cochineal dye allergy.

https://ift.tt/2jGXFuj

The role of adenosine for IgE receptor-dependent degranulation of human peripheral basophils and skin mast cells

Publication date: Available online 25 April 2018
Source:Allergology International
Author(s): Yoshimi Matsuo, Yuhki Yanase, Reiko Irifuku, Kaori Ishii, Tomoko Kawaguchi, Shunsuke Takahagi, Izumi Hide, Michihiro Hide

https://ift.tt/2FT4DFa

Expression of Siglec-8 is regulated by interleukin-5, and serum levels of soluble Siglec-8 may predict responsiveness of severe eosinophilic asthma to mepolizumab

Publication date: Available online 24 April 2018
Source:Allergology International
Author(s): Sayaka Arakawa, Maho Suzukawa, Nobuharu Ohshima, Hiroyuki Tashimo, Isao Asari, Hirotoshi Matsui, Nobuyuki Kobayashi, Shunsuke Shoji, Takahide Nagase, Ken Ohta

https://ift.tt/2KHSjLD

Development of eosinophilic esophagitis following sublingual immunotherapy with cedar pollen extract: A case report

Publication date: Available online 24 April 2018
Source:Allergology International
Author(s): Kousaku Kawashima, Shunji Ishihara, Masaaki Masuhara, Hironobu Mikami, Eiko Okimoto, Naoki Oshima, Norihisa Ishimura, Asuka Araki, Riruke Maruyama, Yoshikazu Kinoshita

https://ift.tt/2FTTsMi

Food-induced anaphylaxis in two patients who were using soap containing foodstuffs

Publication date: Available online 16 April 2018
Source:Allergology International
Author(s): Risa Tamagawa-Mineoka, Koji Masuda, Akiko Yagami, Masashi Nakamura, Nayu Sato, Kayoko Matsunaga, Norito Katoh

https://ift.tt/2jGXy1R

Immune suppression of food allergy by maternal IgG in murine models

Publication date: Available online 30 April 2018
Source:Allergology International
Author(s): Hirotaka Yamashita, Tadamasa Hayashi, Kenichi Saneyasu, Hiroki Matsuhara, Teruaki Matsui, Hiroyuki Tanaka, Naoki Inagaki
BackgroundMost of the patients develop food allergy early in life. The factors related to parental immune condition might be one of the conceivable causes.MethodsWe reported murine models of food allergy and oral OVA tolerance. To investigate the influence of parental immune condition on infant food allergy, female and male mice with food allergy or oral tolerance were mated with each other.ResultsFood allergy was suppressed by decreased IgE production in the offspring of mice with food allergy. On the contrary, anaphylaxis for OVA was induced in the offspring of mice with oral tolerance. The suppression of food allergy being dependent on a maternal factor was revealed in the offspring after cross-mating mice with food allergy and oral tolerance. Because OVA-specific IgG, presumed to be from the allergic mother, was detected in the serum of naïve infants from mothers allergic to food, we assumed that the suppression was dependent on a specific IgG. The serum IgG purified by a G-protein column was administered before OVA sensitization in the food allergy model, and OVA-specific IgE production was found to be diminished in the administered mice. However, OVA-specific monoclonal IgG1 and IgG2a administration could not suppress food allergy. Because we detected OVA-IgG immune complex in the serum of mothers allergic to food, it might be a cause of maternal immune suppression.ConclusionsWe demonstrated that maternal specific IgG conjugated food antigen is an important factor related to the development of food allergy and acquiring tolerance.

https://ift.tt/2FTTnIu

Play in the Information Age

Abstract

This article is an inquiry on the role of play in shaping the cultures of the Information Age. By applying concepts from Postphenomenology and the Philosophy of Information, this paper argues that play and computation share a capacity to shape human experience. I will apply the concept of re-ontologization to describe the effect that computation has had in shaping the world. I will apply the concept of relational strategies to argue that play is a way of interfacing with the computational world. This paper argues that play is a particularly relevant form of shaping the human experience of the re-ontologized infosphere because play, like computation, can create worlds. The goal of this article is to propose a research program that situates play as a relevant perspective to analyze the culture of the Information Age.

https://ift.tt/2KJof1T

Erratum: Hörsturz mit Surditas, Schwindel und Tinnitus - eine 12-jährige Odyssee

Laryngo-Rhino-Otol
DOI: 10.1055/a-0623-6622

Article in Thieme eJournals:
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Anwendung von Vakuum-Wundtherapie bei Spalthaut-Transplantaten im Kopf-Hals-Bereich

Laryngo-Rhino-Otol
DOI: 10.1055/a-0606-5166

Hintergrund Bei der Vakuum-Wundtherapie (VAC) wird durch einen Unterdruck Wundsekret kontinuierlich abgesaugt und so die Bildung von Granulationsgewebe signifikant gesteigert. Im Bereich der Viszeral-, Unfall- und Verbrennungschirurgie kommt diese bei kritischen Wunden häufig zum Einsatz. Im Kopf-Hals-Bereich gibt es wenige Publikationen und begrenzte Erfahrungen. Insbesondere zur Anwendung des VAC-Systems bei Spalthaut-Transplantation (SHT) liegt bislang keine Evidenz vor. Material und Methoden Eine retrospektive Datenbankrecherche ergab insgesamt 36 VAC Anwendungen bei 13 Patienten, die über den Zeitraum von 2012 bis 2017 an der HNO-Universitätsklinik Ulm behandelt wurden. Es erfolgte eine Analyse der Indikationen, klinischen Verläufe und des Outcomes der VAC-Therapie mit Fokus auf die Anwendung im Rahmen einer SHT. Ergebnisse Neben den klassischen Indikationen wie pharyngo-cutanen Fisteln oder Wundheilungsstörungen nach Lappenchirurgie, konnten 7 Fälle von VAC-Anwendung bei Spalthaut-Transplantation identifiziert werden. Die mediane VAC-Behandlungsdauer lag bei 11 Tagen, der VAC-Verband wurde im mittel 2-mal gewechselt, der Sog lag durchschnittlich bei 70 mmHg. Der Wundverschluss war in 13/13 Fällen erfolgreich, in 7/13 Fällen wurde der definitive Wundverschluss durch SHT mit synchronem Anbringen eines VAC-System erreicht, in 4/13 Fällen führte die Sekundärheilung zum Wundverschluss und in 2/13 Fällen war eine Nah- bzw. Fernlappenplastik erforderlich. Schlussfolgerungen Die VAC-Therapie scheint bei prolongierten Wundheilungsverläufen im Kopf-Hals-Bereich eine effektive Therapie darzustellen. Die hier erstmals beschriebene SHT unter VAC-Therapie führt zu hohen Erfolgsraten insbesondere bei vorbestrahlten Patienten oder dem Krankheitsbild der nekrotisierenden Fasziitis und ersetzt zusätzlich den Druckverband.
[...]

Article in Thieme eJournals:
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