[Ultrastructural characteristics of specific granules in rat atrial cardiomyocytes].
Electron-microscopic and electron-histochemical studies of specific granules (SG) in the cardiomyocytes of the left atrial auricle in mongrel white rats have shown that SG of intact rats contained proteins and a small amount of catecholamines. Adrenaline injection resulted in SG hyperplasia, while rausedile injection caused SG emptying. Hemodynamic heart overloading increased SG catecholamine content, with rausedile having a pronounced "exhausting" effect. It is suggested that part of auricular cardiomyocytes can be referred to diffuse endocrine cells.
D000818:Animals; D003594:Cytoplasmic Granules / Q000378:metabolism / Q000648:ultrastructure*; D006325:Heart Atria / Q000378:metabolism / Q000648:ultrastructure; D006651:Histocytochemistry; D008854:Microscopy, Electron; D008929:Mitochondria, Heart / Q000378:metabolism / Q000648:ultrastructure*; D051381:Rats
Ul'trastrukturnaia kharakteristika spetsificheskikh granul predserdnykh kardiomiotsitov krys.