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Acta anatomica 1987

Freeze-fracture replica studies of effects of ACTH treatment and hypophysectomy on the cell surface of the rat adrenal inner cortex.

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T Setoguti
Y Inoue
M Shin

Keywords

Abstract

The morphological change of the cell surface in the inner zone of the adrenal cortex was studied in intact, hypophysectomized, and ACTH-treated hypophysectomized rats, using freeze-fracture replicas. In both intact and hypophysectomized ACTH-treated animals, the P fracture face of the plasma membranes of the cortical cells facing capillaries shows groups of characteristic finger-shaped microvilli, which arise horizontally from the edges of a small cavity on the cell surface to form various configurations ranging from incompletely organized, flower bud-like to complicated, arboraceous ones. In the non-treated hypophysectomized animals, however, the microvilli in such groups decrease in number and shorten in length but increase in width, looking like a blade of a prickly-pear cactus or an irregular-shaped plate. On the other hand, presumptive exocytotic and endocytotic specializations of intra-membraneous and experimental animals.

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