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[Effects of atrial natriuretic peptide AP II on the morphofunctional state of the adrenal cortex of white rats].

The effect of atrial natriuretic peptides synthetic analog AP II on adrenal zona glomerulosa and zona fasciculata physiological regeneration have been studied on male rats. The 3H-thymidine incorporation into DNA in adrenal cortical cells was evaluated in 4 and 24 h after intraperitoneal injection of 10 or 100 mcg/kg AP II. Besides, we have investigated the influence of AP II on adrenal cortical cells karyometric parameter in 4 and 24 h and aldosterone plasma concentration in 1 h after injection. 10 mcg/kg AP II increased the fraction of labelled nuclei in zona glomerulosa and decreased the aldosterone plasma level. No significant changes were seen in zona fasciculata cells proliferation. 100 mcg/kg AP II inhibited the DNA synthesis process in adrenal zona fasciculata, but had no significant influence on zona glomerulosa physiological regeneration and aldosterone plasma concentration. No nuclear morphometric parameter changes were observed in adrenal glomerulosa and fasciculata cells of AP II--treated animals.