The role of eosinophils and basophils in allergic diseases considering genetic findings.

Abstract : PURPOSE OF REVIEW: Basophils and eosinophils represent less than 1 and 5% of white blood cells, respectively. Their role in asthma and allergic inflammation remains incompletely defined. The present review addresses recent advances regarding the role of these two cell populations in allergic inflammation and asthma regarding both biological and genetic point of view. RECENT FINDINGS: Regarding eosinophils, the role of interleukin(IL)-25, IL-33 and thymic stromal lymphoprotein (TSLP) have been evidenced, and activation states of eosinophil β1 and β2 integrins have been found to correlate with the measurement of eosinophil recruitment and pulmonary function in asthma. New insights into the biology of basophils concern their role as regulators of Th2 cell response through IL-4 expression or the differentiation of monocytes to macrophages, and their population heterogeneity in human. The transcription factor PU.1 was reported to be involved in controlling transcription of specific genes both in eosinophils and basophils. Candidate genetic studies on eosinophils have explored genes involved in the intracellular calcium influx and apoptosis. At the genome-wide level, studies identified genetic variants belonging to IL1RL1, TSLP and IL-33, and four loci with pleiotropic effects on eosinophil and basophil counts [GATA2 (3q21), MHC (6p21), HBS1L-MYB (6q23), and ERG (21q22)]. SUMMARY: Recent findings from biological and genetic studies on eosinophils and basophils highlight the role of epithelial cell-derived cytokines such as TSLP and IL-33 in asthma and allergic diseases.
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Current Opinion in Allergy and Clinical Immunology, Lippincott, Williams & Wilkins, 2013, 13 (5), pp.507-13. 〈10.1097/ACI.0b013e328364e9c0〉
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Rachel Nadif, Farid Zerimech, Emmanuelle Bouzigon, Regis Matran. The role of eosinophils and basophils in allergic diseases considering genetic findings.. Current Opinion in Allergy and Clinical Immunology, Lippincott, Williams & Wilkins, 2013, 13 (5), pp.507-13. 〈10.1097/ACI.0b013e328364e9c0〉. 〈inserm-00880260〉

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