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Allen, Irving C; TeKippe, Erin McElvania; Woodford, Rita-Marie T; Uronis, Joshua M; Holl, Eda K; Rogers, Arlin B; Herfarth, Hans H; Jobin, Christian; Ting, Jenny P-Y
The Journal of experimental medicine, 05/2010, Letnik: 207, Številka: 5Journal Article
Colitis-associated cancer (CAC) is a major complication of inflammatory bowel diseases. We show that components of the inflammasome are protective during acute and recurring colitis and CAC in the dextran sulfate sodium (DSS) and azoxymethane + DSS models. Mice lacking the inflammasome adaptor protein PYCARD (ASC) and caspase-1 demonstrate increased disease outcome, morbidity, histopathology, and polyp formation. The increased tumor burden is correlated with attenuated levels of IL-1beta and IL-18 at the tumor site. To decipher the nucleotide-binding domain, leucine-rich-repeat-containing (NLR) component that is involved in colitis and CAC, we assessed Nlrp3 and Nlrc4 deficient mice. Nlrp3(-/-) mice showed an increase in acute and recurring colitis and CAC, although the disease outcome was less severe in Nlrp3(-/-) mice than in Pycard(-/-) or Casp1(-/-) animals. No significant differences were observed in disease progression or outcome in Nlrc4(-/-) mice compared with similarly treated wild-type animals. Bone marrow reconstitution experiments show that Nlrp3 gene expression and function in hematopoietic cells, rather than intestinal epithelial cells or stromal cells, is responsible for protection against increased tumorigenesis. These data suggest that the inflammasome functions as an attenuator of colitis and CAC.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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