ULTRASTRUCTURAL ESTIMATION FACILITIES OF ATRIAL CARDIOMYOCYTE SECRETORY ACTIVITY
I.M. Korostyshevskaya,* V.F. Maksimov, S.A. Kurganov
State Research Institute of Physiology, Siberian Branch of the Russian Academy of Medical Sciences, Novosibirsk;
* e-mail: kor@physiol.ru
The wide experience in the ultrastructural study of myoendocrine cells of different animal species in normal and experimental conditions allows us to choose the optimal methodology
that gives the most complete information about the state of intracellular secretory apparatus. It is revealed that the combined set of atrial myoendocrine cell qualitative and quantitative
parameters allows defining the natriuretic regulatory system status, as well as it's acute and chronic responses to hemodynamic changes. The information value of such approach is
illustrated by examples of the ontogenetic investigation in two rat lines: with normal arterial blood pressure and with inherited stress-induced arterial hypertension. The proposed
methodology is quite sensitive and descriptive; so it is of high importance due to insufficiency of other universal, specific, and accurate methods for cardiac natriuretic peptides
investigation.
Key words: cardiomyocyte, natriuretic peptide, electron microscopy, stereomorphometry
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