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Tanaka, T. et al.

Takuji Tanaka, Yumiko Yasui, Mayu Tanaka, Takahiro Tanaka, Takeru Oyama, K. M. Wahidur Rahman,

Melatonin suppresses AOM/DSS-induced large bowel oncogenesis in rats.

The inhibitory effects of exogenous melatonin (MEL) on colon oncogenesis were investigated using an azoxymethane (AOM)/dextran sodium sulfate (DSS) rat model. Male F344 rats initiated with a single intraperitoneal injection of AOM (20mg/kg bw) were promoted by 1% (w/v) DSS in drinking water for 7 days. They were then given 0.4, 2 or 10ppm MEL in drinking water for 17 weeks. At week 20, the development of colonic adenocarcinoma was significantly inhibited by the administration with MEL dose-dependently. MEL exposure modulated the mitotic and apoptotic indices in the colonic adenocarcinomas that developed and lowered the immunohistochemical expression of nuclear factor kappa B, tumor necrosis factor alpha, interleukin-1beta and STAT3 in the epithelial malignancies. These results may indicate the beneficial effects of MEL on colitis-related colon carcinogenesis and a potential application for inhibiting colorectal cancer development in the inflamed colon.[1]

References

Melatonin suppresses AOM/DSS-induced large bowel oncogenesis in rats. Tanaka, T., Yasui, Y., Tanaka, M., Tanaka, T., Oyama, T., Rahman, K.M. Chem. Biol. Interact. (2009) [Pubmed]

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