期刊
HISTOCHEMISTRY AND CELL BIOLOGY
卷 152, 期 3, 页码 217-225出版社
SPRINGER
DOI: 10.1007/s00418-019-01798-0
关键词
Cardiomyocyte apoptosis; Congenital heart disease; High glucose; GSK3 beta; MCL-1
资金
- National Natural Science Foundation of China [31871391]
- Central Public interest Scientific Institution Basal Research Fund [2018GJZ01]
- National Key Research and Development Program of China [2016YFC1000307]
Gestational diabetes mellitus is a risk factor for congenital heart defects. Our previous results indicated that a decrease in myocardial cells and an increase in apoptotic cells leads to heart defects under hyperglycemia, but much work remains to elucidate this important mechanism of myocardial cell apoptosis induced by high glucose (HG). In this study, we found that a decrease in GSK3 beta phosphorylation on Ser9 occurred concomitantly with HG-induced cardiomyocyte apoptosis and in the heart tissues of the offspring of diabetic rats in vitro and in vivo. Decreases in GSK3 beta (Ser9) phosphorylation in response to HG were remarkably restored after treatment with SC79, an activator of the Akt signaling pathway. SB216763, an effective inhibitor of the GSK3 beta signaling pathway, suppressed HG-induced apoptosis in cardiomyocytes. Further studies showed a decrease in the expression of the anti-apoptotic protein MCL-1 was associated with GSK3 beta-mediated apoptosis. MCL-1 overexpression partly inhibits HG-induced apoptosis in cardiomyocytes. Herein, this study revealed the roles of GSK3 beta and MCL-1 in modulating HG-induced cardiomyocyte apoptosis and maternal diabetes-induced abnormalities.
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