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.
スポンサーリンク
概要
- 論文の詳細を見る
A confocal fluorescence microscope using fluo-3 and 9-(dicyanovinyl)-julolidine (DCVJ) was used to study the mast cell activation by the <I>N</I>-acetyl glucosamine oligomer specific lectin <I>Datura stramonium</I> agglutinin (DSA) and inhibition by antagonist lectins having affinity to <I>N</I>-acetyl glucosamine (GlcNAc). DSA induced a transient increase in intracellular free calcium concentration ([Ca<SUP>2+</SUP>]<SUB>i</SUB>) 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 [Ca<SUP>2+</SUP>]<SUB>i</SUB> 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.
- 公益社団法人 日本薬理学会の論文
著者
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Furuno Tadahide
Faculty Of Pharmaceutical Sciences Nagoya City University
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Nakanishi Mamoru
Faculty Of Pharmaceutical Science University Of Tokyo
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UCHIDA Masaatsu
Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, University of Tokyo
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SUZUKI-NISHIMURA Tamiko
Department of Molecular Pharmacology, Meiji College of Pharmacy
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