Long-acting calcium channel blocker benidipine suppresses expression of angiogenic growth factors and prevents cardiac remodelling in a Type II diabetic rat model

Diabetologia
S JesminA Kitabatake

Abstract

Calcium channel blockers, widely used for the treatment of hypertension and angina, could prevent cardiovascular complications in patients with diabetes. They can improve cardiac remodelling in animal models of a variety of cardiovascular diseases. Here, we examined the therapeutic effect of benidipine, a long-acting calcium channel blocker, on cardiac remodelling in Otsuka-Long-Evans-Tokushima-Fatty (OLETF) rats, a Type II (non-insulin-dependent) diabetes mellitus model. The methods for morphometric analysis included double staining for coronary capillaries, dye-binding staining for collagen content and Masson's trichrome staining for perivascular fibrosis. Immunohistochemical and in situ hybridization techniques were used for detecting protein and mRNA expressions for vascular endothelial growth factors (VEGF), basic fibroblast growth factors (bFGF) and TGF-beta(1), endothelial nitric oxide synthase (eNOS), and anti- and pro-apoptotic markers. OLETF rats showed an increased coronary capillary density, a reduced venular capillary proportion, an increased cardiac collagen content and prominent cardiac perivascular fibrosis. In OLETF rat hearts, significant increases in vascular expressions for VEGF, bFGF and TGF- beta(1) were f...Continue Reading

Citations

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