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Hypothetical Interpretation of the Calcium Paradox in Renin Secretion

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Journal Cell Tissue Res
Date 1988 Jun 1
PMID 3293796
Citations 6
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Abstract

Most renin-positive cells of the preglomerular arteriole are intermediate in morphological appearence between smooth muscle cells and epithelioid cells. Intermediate cells contain, in addition to secretory granules, contractile proteins arranged as a sublemmal network. The paradoxical (inhibitory) role of calcium in renin secretion is explained, on the basis of these findings, by an increased tone of the sublemmal network; this might impair the preexocytotic access of renin granules to the cell membrane.

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