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The anti-inflammatory activity of  Antrodia camphorata  (AC) grown on germinated brown rice (CBR) extract was evaluated  in vitro  and  in vivo . CBR suppressed the release of nitric oxide (NO) and prostaglandin (PG) E2 from lipopolysaccharide-(LPS-)stimulated RAW264.7 cells. CBR inhibited the level of inducible nitric oxide synthase (iNOS) and cyclooxygenase-(COX-)2 proteins, and it activated p38-MAPK, extracellular signal-related kinases (ERK), and NF-  κ  B in LPS-stimulated RAW264.7 macrophages. LPS-induced tumor necrosis factor-  α   (TNF-  α  ) and interleukin-6 (IL-6) mRNA expression was reduced in CBR-treated RAW264.7 cells. In concert with  in vitro  data, CBR suppressed the levels of dextran-sulfate-sodium-(DSS-)induced iNOS and COX-2 proteins in the colon tissue. CBR treatment inhibited activated p38-MAPK, ERK, and NF-  κ  B proteins in the colon tissue of DSS-induced mice. TNF-  α   and IL-6 mRNA expression was reduced in DSS+CBR-treated mice. The disease activity index and histological scores were significantly lower in CBR-treated mice (500 mg/kg/day) than in DSS-treated mice ( P  < 0.05 versus DSS). This is the first report of anti-inflammatory activity of CBR in DSS-induced acute colitis. These results suggest that CBR is a promising, potential agent for preventing acute colitis through the inhibition of NF-  κ  B signaling and its upstream signaling molecules, including MAPKs.

Ethanol Extract ofAntrodia camphorataGrown on Germinated Brown Rice Suppresses Inflammatory Responses in Mice with Acute DSS-Induced Colitis