An Initial Signal of Activation of Rat Peritoneal Mast Cells Stimulated by Datura stramonium Agglutinin: A Confocal Fluorescence Microscopic Analysis of Intracellular Calcium Ion and Cytoskeletal Assembly

The Japanese Journal of Pharmacology

Mamoru Nakanishi¹  Tadahide Furuno¹  Tamiko Suzuki-Nishimura²  Masaatsu K. Uchida² 

[1] Faculty of Pharmaceutical Sciences, Nagoya City University;Department of Molecular Pharmacology, Meiji College of Pharmacy

关键词: Mast cell;    Intracellular calcium ion;    Cytoskeletal assembly;    Confocal fluorescence microscope;    Datura stramonium agglutinin;   

DOI  :  10.1254/jjp.66.205

学科分类：药理学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(15)Cited-By(6)A confocal fluorescence microscope using fluo-3 and 9-(dicyanovinyl)-julolidine (DCVJ) was used to study the mast cell activation by the N-acetyl glucosamine oligomer specific lectin Datura stramonium agglutinin (DSA) and inhibition by antagonist lectins having affinity to N-acetyl glucosamine (GlcNAc). DSA induced a transient increase in intracellular free calcium concentration ([Ca2+]i) followed by cytoskeletal disassembly and reassembly in rat peritoneal mast cells. These changes induced by DSA resulted in histamine release. The time course of fluorescence intensity in mast cells loaded with fluo-3 or DCVJ and activated by DSA resembled those activated by the basic polymer compound 48/80. Inhibition of [Ca2+]i rise by antagonist lectins was responsible for the inhibition of cytoskeletal assembly and the consequent histamine release induced by DSA. At the level of the individual cell, a mast cell stimulated by DSA responds in an all-or-none fashion. DSA possibly induced intracellular calcium mobilization and cytoskeletal change by recognizing the GlcNAc-oligomer residues of specific glycoproteins of mast cells.

【 授权许可】

Unknown