CANATOXIN TRIGGERS HISTAMINE-SECRETION FROM RAT PERITONEAL MAST-CELLS

被引：15

作者：

GRASSIKASSISSE, DM ^{[1
]}

RIBEIRODASILVA, G ^{[1
]}

机构：

[1] STATE UNIV CAMPINAS, FAC MED SCI, DEPT PHARMACOL, POB 6111, BR-13081 CAMPINAS, SP, BRAZIL

来源：

AGENTS AND ACTIONS | 1992年 / 37卷 / 3-4期

关键词：

D O I：

10.1007/BF02028110

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Canatoxin, a toxic protein present in the seeds of Canavalia ensiformis, induces the secretion of serotonin, dopamine and insulin through activation of the lipoxygenase pathway. The purpose of the present study was to verify if canatoxin causes histamine release from rat peritoneal mast cells and to perform a detailed study of this phenomenon. Our results indicate that canatoxin is capable of activating mast cells to release histamine. The process is time- and concentration-dependent, occurs without cell damage and requires metabolic energy as well as the presence of divalent cations (Ca2+ and Mg2+). Optimal release occurs at 37-degrees-C and at physiological pH. Extremes of temperature (0-degrees-C and 45-degrees-C) inhibit the process. We conclude that canatoxin induces histamine release from rat peritoneal mast cells by an active secretory process.

引用

页码：204 / 209

页数：6

共 44 条

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