Prostaglandins and their receptors in eosinophil function and as therapeutic targets

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Of the known prostanoid receptors, human eosinophils express the prostaglandin D 2 (PGD 2 ) receptors DP1 [also D-type prostanoid (DP)] and DP2 (also chemoattractant receptor homologous molecule, expressed on Th2 cells), the prostaglandin E2 receptors EP2 and EP4, and the prostacyclin (PGI 2 ) receptor IP. Prostanoids can bind to either one or multiple receptors, characteristically have a short half-life in vivo, and are quickly degraded into metabolites with altered affinity and specificity for a given receptor subtype. Prostanoid receptors signal mainly through G proteins and naturally activate signal transduction pathways according to the G protein subtype that they preferentially interact with. This can lead to the activation of sometimes opposing signaling pathways. In addition, prostanoid signaling is often cell-type specific and also the combination of expressed receptors can influence the outcome of the prostanoid impulse. Accordingly, it is assumed that eosinophils and their (patho-)physiological functions are governed by a sensitive prostanoid signaling network. In this review, we specifically focus on the functions of PGD 2 , PGE 2 , and PGI 2 and their receptors on eosinophils. We discuss their significance in allergic and non-allergic diseases and summarize potential targets for drug intervention.




Peinhaupt, M., Sturm, E. M., & Heinemann, A. (2017). Prostaglandins and their receptors in eosinophil function and as therapeutic targets. Frontiers in Medicine. Frontiers Media S.A.

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