Israpafant is a selective antagonist for the platelet-activating factor receptor ( IC50 = 0.84nM). Israpafant inhibits PAF-induced human platelet aggregation. Israpafant inhibits the activation of eosinophil cells and consequently delays the development o
NVP-QAV-680 is a potent and selective antagonist of CRTh2 receptor. NVP-QAV-680 has nM functional potency for inhibition of CRTh2 driven human eosinophil and Th2 lymphocyte activation in vitro.
PAF C-18:1 is a naturally occurring phospholipid produced by cells upon stimulation and plays a role in the establishment and maintenance of the inflammatory response. It is less potent than PAF C-16 and PAF C-18 in the induction of neutrophil chemotaxis, but is equipotent to PAF C-16 and PAF C-18 in promoting eosinophil migration. PAF C-18:1 activates the PAF receptor and has been used in antibody binding experiments to determine the importance of an acyl linkage at the sn-2 position for recognition at this receptor.
8(S),15(S)-DiHETE is formed when 15(S)-HETE is subjected to further oxidation by 15-LO. It causes eosinophil chemotaxis with an ED50 value of 1.5 μM but is not chemotactic for neutrophils. 8(S),15(S)-DiHETE antagonizes the hyperalgesic activity of 8(R),15(S)-DiHETE and LTB4 in the rat hind paw pain model.