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- 저자 : Daniel W. Rosenberg (검색결과 2 건)
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Masako Nakanish,Daniel W. Rosenberg 대한암예방학회 2021 Journal of cancer prevention Vol.26 No.4
Activation of the COX-2/microsomal prostaglandin E synthase-1 (mPGES-1)/prostaglandin E2 (PGE2) signaling axis is a hallmark of many cancers, including colorectal cancer, prompting the implementation of prevention strategies targeting COX-2 activity. We have previously shown that targeting the downstream terminal PGE2 synthase, mPGES-1 (Ptges), specifically reduces inducible PGE2 formation without disrupting synthesis of other essential prostanoids, thereby conferring dramatic cancer protection against colon carcinogenesis in multiple mouse models. In order to accelerate its development as a viable drug target, and to better understand the mechanisms by which PGE2 influences colon carcinogenesis, we recently developed a conditional Ptges knockout mouse model (cKO). To evaluate the functional role of Ptges directly within the colonic epithelia, cKO mice were crossed with carbonic anhydrase 1 (Car1)-Cre mice (cKO.Car1), and colon tumors were induced using the azoxymethane/dextran sodium sulfate protocol. Unexpectedly, epithelial-specific blockade of Ptges failed to protect mice against colon tumor development. Further studies using the cKO mouse model will be necessary to pinpoint the cell type-specific location of mPGES-1 and its control of inducible PGE2 formation that drives tumor formation in the colon. Key Words PGE2, mPGES-1, Colonic neoplasms, Azoxymethane, Dextran sulfate sodium
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Murine Models of Ulcerative Colitis
Flynn, Christopher,Levine, Joel,Rosenberg, Daniel-W. The Pharmaceutical Society of Korea 2003 Archives of Pharmacal Research Vol.26 No.6
Ulcerative colitis (UC) is an inflammatory bowel disease of unknown etiology limited to the large intestine. The disease is prevalent in industrial societies and is associated with specific ethnic populations. A number of murine models, each focused on distinct aspects of the disease process, were developed over the past 20 years to further our understanding of the pathogenesis of UC. These models have been and remain our best resource for the study of the disorder as a result of their homology to human UC and the ease in which they can be manipulated and examined. This review examines and distills what has been learned from these models and how this information is related back to human UC.
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