Transcriptome analysis of ultraviolet A-induced photoaging cells with deep sequencing

Abstract

Gene expression changes associate with many biological processes. However, the relative consequences of the genetic alterations induced by ultraviolet (UV)-A radiation on skin photoaging are still not clear. Here, we performed deep sequencing of the transcriptome and explored altered genes related to biological changes in repeated UV-A-irradiated human dermal fibroblasts (HDF) to better understand the skin photoaging mechanisms. The repeatedly UV-A-irradiated group (HDF were induced by 10 J/cm² UV-A twice daily for 7 days) and the control group (HDF without irradiation) were evaluated. Expression genes profile was measured and compared using high-throughput sequencing on an Illumina HiSeq 2500 platform and DEGseq. Functional annotation and metabolic pathway analysis of genes with altered expression were preformed via National Center for Biotechnology Information, Uniprot, Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases. Genes related to skin photoaging were verified by quantitative reverse transcription polymerase chain reaction. Transcriptome comparison revealed that 607 genes exhibited significant changes (P < 0.05), of which 238 genes were upregulated and 369 downregulated in UV-A-irradiated HDF. Functional annotations showed that genes altered by UV-A irradiation took part in a variety of biological process, cellular component synthesis, molecular function and metabolic pathway. Photoaging-related genes encoding elastin, sprout, cathepsin K, cathepsin D, cathepsin B ribose-phosphate diphosphokinase and phosphoglucomutase were identified to be changed. We obtained the comprehensive transcriptome and altered genes in repeated UV-A-irritated HDF and identified that the modulated genes were related to a wide panel of pathways and functions. Our results provide new insights into photoaging molecular mechanisms and suggest some novel targets for interfering in skin photoaging.

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Azathioprine monotherapy in autoimmune blistering diseases: A feasible option for mild to moderate cases

Abstract

Azathioprine (AZP) is used as a corticosteroid (CS)-sparing medication to treat autoimmune blistering diseases. In this study, we examined the efficacy of AZP and the feasibility of using AZP monotherapy (without CS) to treat pemphigus and pemphigoid. We performed a retrospective study of 10 Japanese patients (seven with pemphigus and three with pemphigoid) with mild to moderate disease activity who had been treated using AZP. The treatment efficacy was evaluated based on decreases in the disease activity scores and autoantibody titers. The results demonstrate that seven out of 10 cases (70%) were treated successfully using AZP monotherapy with no severe adverse effects. The disease activity scores of the successfully-treated patients decreased to zero after 1–37.5 months (average, 11.9) and the average disease activity scores in these cases decreased significantly at 2 months (38.2 ± 36.6%) compared with the scores of the three patients who required additional systemic CS therapy (77.5 ± 3.5%) (P < 0.05). Additionally, the autoantibody titers of five cases treated successfully using AZP decreased by half at 6 months. In conclusion, our findings suggest that AZP monotherapy is a viable treatment option for mild to moderate pemphigus and pemphigoid.

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Complications of botulinum toxin injection for masseter hypertrophy: Incidence rate from 2036 treatments and summary of causes and preventions

Summary

Background

Masseter hypertrophy is a common, prominent feature in many Asian patients, and correction procedures are often requested for esthetic reasons. Toxin masseter injections have a high efficacy and safety profile, but the risks of a variety of side effects or complications remain.

Objectives

The categorization of various complications was based on etiology, with a presentation of the author's own incidence rates for consideration and comparison.

Methods

Six hundred and eighty patients received a total of 2036 sessions of toxin injection for masseter hypertrophy from 2011 to 2016, and complications or complaints were recorded through follow-up on a by-treatment basis. Complications were grouped together based on etiology and discussed.

Results

Of 2036 sessions, temporary mastication force decrease was reported after 611 (30%), bruising after 51 (2.5%), headaches after 12 (0.58%), smile limitation after 3 (0.15%), paradoxical bulging after 10 (0.49%), sunken cheeks (subzygomatic volume loss) after 9 (0.44%), and sagging after 4 (0.20%).

Conclusions

Masseter injections remain very safe. To further decrease the incidence rate, injections should only be inside the recommended safety zone, a quadrilateral within the muscle that avoids most important local structures. Keeping injections inside the safe zone, and ideally in 3-4 different locations at least 1 cm from any border, is crucial for the prevention of complications.

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Possible role of interleukin-17 and macrophage migration inhibitory factor in cutaneous warts

Summary

Background/Objectives

Cutaneous warts (CW), or verrucae, are benign proliferation of skin that result from infection with human papilloma viruses. Cellular immune reactivity plays a significant role in wart regression. The aim of this study was to elucidate the cellular immune status of patients with CW through measurements of their serum levels of interleukin-17 (IL-17) and macrophage migration inhibitory factor (MIF,) and, identify the possible role of IL-17 and MIF in CW. We assessed serum IL-17 and MIF levels in patients with different forms of CW and compare the results with controls.

Patient and methods

Serum levels of IL-17 and MIF were measured using commercially available ELISA assay kits in 60 patients with CW and 20 healthy controls.

Results

Serum levels of IL-17 and MIF were significantly lower in patients with CW when compared with the controls (P-value <.01, <.05, respectively). There was nonsignificant correlation between IL-17 and MIF.

Conclusion

Low IL-17 and MIF levels may have a contributory role in occurrence, maintenance, severity, and recurrence of different types of CW which depend mainly on the defect of cell-mediated immunity. This may shed new light on nontraditional strategies for the future medical treatments of CW through regulation of IL-17 and MIF.

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Reinterpreting recent thymic emigrant function: defective or adaptive?

Cody A Cunningham | Eric Y Helm | Pamela J Fink

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Rapid and comprehensive discovery of unreported shellfish allergens using large-scale transcriptomic and proteomic resources

Publication date: Available online 16 December 2017
Source:Journal of Allergy and Clinical Immunology
Author(s): Roni Nugraha, Sandip D. Kamath, Elecia Johnston, Kyall R. Zenger, Jennifer M. Rolland, Robyn E. O'Hehir, Andreas L. Lopata




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Chiari 1 Malformation in a Child with Febrile Seizures, Parasomnias, and Sleep Apnea Syndrome

Introduction. The type I is the most common Chiari malformation in children. In this condition, the lower part of the cerebellum, but not the brain stem, extends into the foramen magnum at the base of the skull leading to disturbances in cerebrospinal fluid circulation and to direct compression of nervous tissue. Case report. We describe a 4-year-old Caucasian female child with febrile seizures, headache, parasomnias, and a delay of speech. The child underwent a magnetic resonance imaging to investigate these neurological signs, disclosing a Chiari malformation type 1. The polysomnography showed a mild-moderate sleep-disordered breathing, increased number of central sleep apneas, and generalized spike waves at sleep onset. Conclusions. Seizures have been seldom described in CM1 patients. The main reasons for performing MRI in this case were frequent seizures, a delay of speech, and headache, leading to an unexpected diagnosis of CM1. Polysomnography detected a discrete SDB.

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Fertility-sparing surgery in advanced stage malignant ovarian germ cell tumor: a case report

Malignant ovarian germ cell tumor is a rare type of disease, which generally has a good prognosis due to the high chemosensitivity of this type of tumor.

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