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- W2116988190 abstract "<i>Salvia miltiorrhiza</i> (Danshen), a traditional Chinese herbal medicine, is commonly used for the prevention and treatment of cardiovascular disorders including atherosclerosis. However, the mechanisms responsible for the vasoprotective effects of Danshen remain largely unknown. Salvianolic acid B (Sal B) represents one of the most bioactive compounds that can be extracted from the water-soluble fraction of Danshen. We investigated the effects of Danshen and Sal B on the inflammatory response in murine macrophages. Danshen and Sal B both induced the expression of heme oxygenase-1 (HO-1) and inhibited nitric oxide (NO) production and inducible NO synthase (iNOS) expression in lipopolysaccharide (LPS)-activated RAW 264.7 cells. Inhibition of HO activity using Sn-protoporphyrin-IX (SnPP) abolished the inhibitory effect of Sal B on NO production and iNOS expression. Sal B increased macrophage arginase activity in a dose-dependent manner and diminished LPS-inducible tumor necrosis factor-α production. These effects were also reversed by SnPP. These data suggest that HO-1 expression plays an intermediary role in the anti-inflammatory effects of Sal B. In contrast to the observations in macrophages, Sal B dose-dependently inhibited arginase activity in murine liver, kidney, and vascular tissue. Furthermore, Sal B increased NO production in isolated mouse aortas through the inhibition of arginase activity and reduction of reactive oxygen species production. We conclude that Sal B improves vascular function by inhibiting inflammatory responses and promoting endothelium-dependent vasodilation. Taken together, we suggest that Sal B may represent a potent candidate therapeutic for the treatment of cardiovascular diseases associated with endothelial dysfunction." @default.
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- W2116988190 date "2012-03-22" @default.
- W2116988190 modified "2023-10-07" @default.
- W2116988190 title "Salvianolic Acid B Exerts Vasoprotective Effects through the Modulation of Heme Oxygenase-1 and Arginase Activities" @default.
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- W2116988190 doi "https://doi.org/10.1124/jpet.111.190736" @default.
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