Abstract
The Korean indigenous medicine "Dohongsamultang (DHSMT)" has long been used for various cerebrovascular diseases. However, the exact mechanism for the anti-inflammatory effect of DHSMT is not completely understood. The aim of the present study is to elucidate how DHSMT modulates the inflammatory reaction in lipopolysaccaride (LPS)-stimulated peripheral mononuclear cells from cerebral infarction (CI) patients. Production and expression of cytokine was measured via the ELISA and RT-PCR methods. The level of nuclear factor-kappa B (NF-kappaB)/Rel A protein and NF-kappaB DNA binding activity were determined via the Western blot analysis and transcription factor enzyme-linked immunoassay. It showed that DHSMT inhibited the production of TNF-alpha, IL-1beta, and IL-6 induced by LPS in a dose-dependent manner (p < 0.05). The maximal inhibition rates for TNF-alpha, IL-1beta, and IL-6 production by DHSMT were about 50.18%, 32.13%, and 38.03%, respectively. DHSMT inhibited the TNF-alpha mRNA expression in a dose-dependent manner. We also showed that the inhibitory effect of DHSMT is through the suppression of the NF-kappaB pathway. The study suggests an important molecular mechanism by GMGHT to reduce inflammation, which might explain its beneficial effect in the regulation of inflammatory reactions.
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