비후된 심근에서의 유세포 분석을 통한 Nuclear DNA 의 관찰

Background: During the development of the cardiac hypertrophy, cytoplasmic contents of cardiac myocyte usually increase, but the changes in the nucleus of myocytes are not well understood. Therefore, we used flow cytometry to study the changes of nuclear DNA in cardiac hypertrophy from human autopsy heart tissue. Besides, we also tried to see the DNA ploidy of developing heart of fetus. Method: Nine hypertrophied human hearts ranging from 350-620 g (Group II: 350-500 g, Group III: > 500 g) and 9 control hearts (Group I: 250-350 g) which we could obtain after the legal autopsy were studied with flow cytometric analysis. And 3 fetal hearts of 20-24 gestational weeks (Group IV) were also studied. Nuclear DNA was analyzed with FACScan (Becton-Dickinson Co.) after tissue preparation using Modified Hedley and Vindelov Method and staining with Krishan staining buffer. Results: In control hearts (Group I), Flow cytometric analysis showed normal Diploidy pattern in all tissue. However, in cardiac hypertrophy, Non-Diploidy pattern was predominant (3 out of 5 specimen in Group II, and all 4 specimen in Group III) and Tetraploidy was usually observed in this abnormal ploidy pattern, but Aneuploidy was also seen in 2 cases of severe hypertrophy of Group III. Proliferative indexes increased progressively in Group I, II, and III (17.8±5.55, 24.8±7.4%, and 36.4±5.2%, respectively) (p