Title : The mechanism of mediator release from human basophils induced by platelet-activating factor.

Pub. Date : 1990 Dec 1

PMID : 1700998






7 Functional Relationships(s)
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1 PAF (10 nM to 1 microM) caused a concentration-dependent, noncytotoxic histamine release (greater than or equal to 10% of total) in 27 of 44 subjects tested (24 atopic and 20 nonatopic donors). Histamine PCNA clamp associated factor Homo sapiens
2 Coincubation of PAF with cytochalasin B (5 micrograms/ml) enhanced the release of histamine induced by PAF and activated the release process in most donors (42 of 44). Histamine PCNA clamp associated factor Homo sapiens
3 Coincubation of PAF with cytochalasin B (5 micrograms/ml) enhanced the release of histamine induced by PAF and activated the release process in most donors (42 of 44). Histamine PCNA clamp associated factor Homo sapiens
4 The release of histamine activated by PAF was inhibited by the specific PAF receptor antagonist, L-652,731, with an IC50 of 0.4 microM. Histamine PCNA clamp associated factor Homo sapiens
5 The release of histamine activated by PAF was inhibited by the specific PAF receptor antagonist, L-652,731, with an IC50 of 0.4 microM. Histamine PCNA clamp associated factor Homo sapiens
6 If neutrophils were removed from the basophil preparation by a Percoll gradient or a countercurrent elutriation technique, there was a significant decrease in PAF-induced histamine release. Histamine PCNA clamp associated factor Homo sapiens
7 Finally, among human histamine-containing cells, the basophils are unique in degranulating following a PAF challenge. Histamine PCNA clamp associated factor Homo sapiens