ISSN:
1420-908X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The protective effects on mast cell activation were compared between a new antiallergic agent, KP-136 and disodium cromoglycate (DSCG), both of which inhibited the immunological degranulation of rat peritoneal mast cells. The IC50 was 0.03 μg/ml for KP-136 and 4.7 μg/ml for DSCG. KP-136 predominantly acted on the early stage of mast cell activation processes and inhibited the immunological increase in45Ca uptake. KP-136 also inhibited A23187-and heat-induced degranulation and heat-induced hemolysis. In addition, KP-136 was effective on phospholipase A2-induced degranulation, although the compound did not directly affect the enzyme activity. In all tests for comparison, KP-136 and DSCG had similar profiles of action and the parallel experiments indicated that KP-136 was a more potent inhibitor of mast cell activation than DSCG, having a DSCG-like membrane stabilizing activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01965038
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