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Παρασκευή 27 Οκτωβρίου 2017

Chronic Rhinosinusitis: Endotypes, Biomarkers and Treatment Response

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Publication date: Available online 26 October 2017
Source:Journal of Allergy and Clinical Immunology
Author(s): Jose Gurrola, Larry Borish
It is increasingly recognized that chronic rhinosinusitis (CRS) comprises a spectrum of different diseases with distinct clinical presentations and pathogenic mechanisms. Defining the distinct phenotypes and endotypes of CRS impacts prognosis and most importantly is necessary as the basis for making therapeutic decisions. The need for individualized defining of pathogenic mechanisms prior to initiating therapy extends to virtually all therapeutic considerations. This is clearly crucial with antibiotics where, barring an influence from their off-target anti-inflammatory pharmacological effects, an understanding of the role of individual biome predicts likelihood of therapeutic benefit. But this need for identifying individual phenotypes and endotypes also extends to the agent that is currently considered the mainstay of treatment of CRS, specifically glucocorticoids (GCS). As with asthma, it is recognized that a large minority of CRS patients have a steroid-resistant phenotype, identification of which will preclude use of these agents with their potential side effects. Identification of endotypes is also becoming increasingly imperative as targeted biotherapeutic agents, such as anti-IgE and anti-cytokine antibodies are becoming available. These agents are likely to benefit patients in whom the targeted mediator is not only expressed but demonstrably driving a central mechanism in that individual. In summary, the treatment of CRS is at an exciting crossroad. On the positive side, numerous therapeutics are in development that seem likely to positively impact our patients who suffer from this condition. The challenge is that these therapies will require targeted individualized treatments based upon identifying subjects with the relevant endotype.



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