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Introduction of Macromolecules into Bovine Adrenal Medullary Chromaffin Cells and Rat Pheochromocytoma Cells (PC12) by Permeabilization with Streptolysin O: Inhibitory Effect of Tetanus Toxin on Catecholamine Secretion
Author(s) -
AhnertHilger Gudrun,
Bader MarieFrance,
Bhakdi Sucharit,
Gratzl Manfred
Publication year - 1989
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1111/j.1471-4159.1989.tb07253.x
Subject(s) - exocytosis , streptolysin , chromaffin cell , biology , secretion , bafilomycin , intracellular , dithiothreitol , microbiology and biotechnology , biochemistry , adrenal medulla , catecholamine , endocrinology , enzyme , apoptosis , autophagy , bacterial protein , gene
Conditions are described for controlled plasma membrane permeabilization of rat pheochromocytoma cells (PC12) and cultured bovine adrenal chromaffin cells by Streptolysin O (SLO). The transmembrane pores created by SLO invoke rapid efflux of intracellular 86 Rb + and ATP, and also permit passive diffusion of proteins, including immunoglobulins, into the cells. SLO‐permeabilized PC12 cells release [ 3 H]dopamine in response to micromolar concentrations of free Ca 2+ . Permeabilized adrenal chromaffin cells present a similar exocytotic response to Ca 2+ in the presence of Mg 2+ / ATP. Permeabilized PC12 cells accumulate antibodies against synaptophysin and calmodulin, but neither antibody reduces the Ca 2+ ‐dependent secretory response. Reduced tetanus toxin, although ineffective when applied to intact chromaffin cells, inhibits Ca 2+ ‐induced exocytosis by both types of permeabilized cells studied. Omission of dithiothreitol, toxin inactivation by boiling, or preincubation with neutralizing antibodies abolishes the inhibitory effect. The data indicate that plasma membrane permeabilization by Streptolysin O is a useful tool to probe and define cellular components that are involved in the final steps of exocytosis.