Inhibitory Effects of Momordicine I on High-Glucose-Induced Cell Proliferation and Collagen Synthesis in Rat Cardiac Fibroblasts

Figure 5

Momordicine I inhibits high-glucose-induced TGF-β1 secretion, cell proliferation, and collagen synthesis in rat cardiac fibroblasts in an Nrf2-dependent manner. (a) The Nrf2 inhibitor brusatol prevents the inhibitory effect of momordicine I on high-glucose-induced TGF-β1 secretion. Results are expressed as means ± SEM (). (b) Brusatol prevents the inhibitory effect of momordicine I on high-glucose-induced cell proliferation. Results are expressed as means ± SEM (). (c) Brusatol prevents the inhibitory effect of momordicine I on high-glucose-induced collagen synthesis. Cells were treated with brusatol (10 nM) for 30 min, followed by 1 μM momordicine I for 12 h, and were subsequently cultured in high-glucose medium for 24 h. Results are expressed as means ± SEM (). (d) Nrf2 siRNA prevents the inhibitory effect of momordicine I on high-glucose-induced TGF-β1 secretion. Results are expressed as means ± SEM (). (e) Nrf2 siRNA prevents the inhibitory effect of momordicine I on high-glucose-induced cell proliferation. Results are expressed as means ± SEM (). (f) Nrf2 siRNA prevents the inhibitory effect of momordicine I on high-glucose-induced collagen synthesis. Results are expressed as means ± SEM (). compared with the control group; versus the high-glucose group; versus momordicine I treatment in the high-glucose group.

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