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Adiponectin deficiency enhances colorectal carcinogenesis and liver tumor formation induced by azoxymethane in mice

World Journal of Gastroenterology 2008年第42期14卷 6473-6480页

作者： Tamao Nishihara Miyako Baba Morihiro Matsuda Masahiro Inoue Yasuko Nishizawa atsunori fukuhara Hiroshi Araki Shinji Kihara Tohru Funahashi Shinji Tamura Norio Hayashi Hiroyasu Iishi Iichiro Shimomura Department of Gastroenterology and Hepatology Graduate School of Medicine Osaka University 2-2 Yamada-oka Suita Osaka 565-0871 Japan Department of Pathology Osaka Medical Center for Cancer and Cardiovascular Diseases Research Institute 1-3-2 Nakamichi Higashinari-ku Osaka 537-8511 Japan Department of Metabolic Medicine Graduate School of Medicine Osaka University 2-2 Yamada-oka Suita Osaka 565-0871 Japan Department of Biochemistry Osaka MedicaCenter for Cancer and Cardiovascular Diseases ResearchInstitute 1-3-2 Nakamichi Higashinari-ku Osaka 537-8511Japan Department of Gastrointestinal Oncology Osaka Medical Center for Cancer and Cardiovascular Diseases 1-3-3 Nakamichi Higashinari-ku Osaka 537-8511 Japan

AIM:To investigate the causal relationship between hypoadiponectinemia and colorectal carcinogenesis in in vivo experimental model,and to determine the con-tribution of adiponectin defi ciency to colorectal cancer development and ***:We examined the influence of adiponectin defi ciency on colorectal carcinogenesis induced by the administration of azoxymethane(AOM)(7.5 mg/kg,in-traperitoneal injection once a week for 8 wk),by using adiponectin-knockout(KO) ***:At 53 wk after the fi rst AOM treatment,KOmice developed larger and histologically more progres-sive colorectal tumors with greater frequency com-pared with wild-type(WT) mice,although the tumor incidence was not different between WT and KO *** mice showed increased cell proliferation of colorec-tal tumor cells,which correlated with the expression levels of cyclooxygenase-2(COX-2) in the colorectal *** addition,KO mice showed higher incidence and frequency of liver tumors after AOM *** percent of WT mice developed liver tumors,and these WT mice had only a single *** contrast,50% of KO mice developed liver tumors,and 58% of these KO mice had multiple ***:Adiponectin deficiency enhances colorectal carcinogenesis and liver tumor formation induced by AOM in *** study strongly suggests that hypoadiponectinemia could be involved in the pathogenesis for colorectal cancer and liver tumor in human subjects.

关键词：结肠直肠癌细胞增殖致癌作用肝癌

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