[Comparative cytophotometric analysis of the nucleic acid content in the cardiomyocytes of normal rats and following experimental infarct].
The cytophotometrical investigation of gallocyanine-chrome alum stained cardiac muscle cells allows to ascertain that a mean content of the nucleic acids calculated for a single nucleus is essentially higher in the left ventricle myocytes in comparison with the left auricle cells of healthy adult rats. These values in 1-, 2- and 3-nuclear cells of the ventricle are, respectively, 21.3, 19.3, and 18.0, and 14.1, 13.7, 13.5 of arbitrary units (a. u.) in the auricle cells. A difference in cytoplasmic RNA contents of the same cells is more significant, these values are 65.7, 116.4, and 158.9 a. u. in ventricle myocytes, and 33.4, 60.8 and 95.2 a. u. in auricle cells. The nucleic acids content in the nuclei and RNA content in the cytoplasm increase with the development of proliferation in myocytes after experimental myocardial infarction. A relative increase in the nucleic acids content in the nuclei of the same cell types reaches 50, 24, and 10% 11 days after infarction and 56, 38, and 45% 31 days after infarction. A relative increase in cytoplasmic RNA of the same cells reaches, respectively, 52, 17, and 25%, and 70, 57, and 53% 11 and 31 days after infarction. These findings evidence on the greatest synthetic activity of the single-nuclear auricle muscle cells in the process of heart restoration after infarction.
Selivanova
G V
GV
Nilova
V K
VK
Vlasova
T D
TD
Bushmarina
M S
MS
Rumiantsev
P P
PP
D000818:Animals; D002467:Cell Nucleus / Q000032:analysis; D003592:Cytophotometry; D003593:Cytoplasm / Q000032:analysis; D006325:Heart Atria / Q000032:analysis; D006352:Heart Ventricles / Q000032:analysis; D008297:Male; D009203:Myocardial Infarction / Q000378:metabolism*; D009206:Myocardium / Q000032:analysis*; D012313:RNA / Q000032:analysis*; D051381:Rats; D011919:Rats, Inbred Strains; D013997:Time Factors
D012313:RNA
Sravnitel'naia tsitofotometricheskiĭ analiz soderzhaniia nukleinovykh kislot v kardiomiotsitakh krysy v norme i posle éksperimental'nogo infarkta.