Curcumin prevents diabetic cardiomyopathy in streptozotocin-induced diabetic rats: possible involvement of PKC-MAPK signaling pathway

European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences
Vivian SoetiknoKenichi Watanabe

Abstract

The development of diabetic cardiomyopathy is accompanied with a high membrane-bound protein kinase C (PKC) levels. Curcumin is a naturally occurring compound which is known to inhibit PKC activity. However, the effects of curcumin on ameliorating diabetic cardiomyopathy are still undefined. We evaluated whether curcumin treatment is associated with the modulation of PKC-α and -β₂-mitogen-activated protein kinase (MAPK) pathway in experimental diabetic cardiomyopathy. Diabetes was induced in male Sprague-Dawley rats by streptozotocin (STZ). Curcumin (100mg/kg/day) was started three weeks after STZ injection and was given for 8 weeks. We demonstrate that curcumin significantly prevented diabetes-induced translocation of PKC-α and -β2 to membranous fraction and diabetes-induced increased phosphorylation of p38MAPK and extracellular regulated-signal kinase (ERK)1/2 in left ventricular tissues of diabetic rats. Curcumin treatment also markedly decreased NAD(P)H oxidase subunits (p67phox, p22phox, gp91phox), growth factors (transforming growth factor-β, osteopontin) and myocyte enhancer factor-2 protein expression as well as inhibited NF-κB activity at nuclear level. Furthermore, curcumin decreased the mRNA expression of transcripti...Continue Reading

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Citations

Jun 20, 2013·Cardiovascular Diabetology·Hong LiChuanshi Xiao
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