Ca2+-induced biochemical changes in human erythrocytes and their relation to microvesiculation

Allan, D. and Thomas, Paul (1981) Ca2+-induced biochemical changes in human erythrocytes and their relation to microvesiculation. Biochemical Journal, 198 (3). 433–440. ISSN 0264-6021

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Abstract

1. Human erythrocytes were treated with Ca2+ and ionophore A23187 and measurements were made of K+ efflux, polyphosphoinositide breakdown, 1,2-diacylglycerol accumulation, phosphatidate synthesis, changes in membrane polypeptide pattern and release of microvesicles. 2. It was shown that neither transamidase-mediated protein cross-linking, proteolysis of polypeptides 2.1 (ankyrin) or 4.1, nor accumulation of diacylglycerol or phosphatidate appeared to be necessary for microvesiculation to occur. 3. Microvesicles were released only under conditions where KCl efflux leading to cell shrinkage occurred and where polyphosphoinositides were broken down. These circumstances were sufficient to cause microvesiculation only in the presence of increased intracellular concentrations of Ca2+.

Item Type: Article
Faculty \ School: Faculty of Science
Depositing User: LivePure Connector
Date Deposited: 03 Mar 2020 09:10
Last Modified: 12 May 2020 23:58
URI: https://ueaeprints.uea.ac.uk/id/eprint/74390
DOI: 10.1042/bj1980433

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