Consumption of vitamin B6 reduces colonic damage and protein expression of HSP70 and HO-1, the anti-tumor targets, in rats exposed to 1,2-dimethylhydrazine

作者: TOMOKO KAYASHIMA , KENTA TANAKA , YUKAKO OKAZAKI , KIMINORI MATSUBARA , NORIYUKI YANAKA

DOI: 10.3892/OL.2011.370

关键词:

摘要: Mounting evidence indicates that vitamin B6 is a protective factor for colon cancer. Elevations in colonic damage, cell proliferation and heat shock proteins (HSPs, molecular chaperones) have been suggested to be associated with carcinogenesis. This study was performed examine the effect of dietary levels (1, 7 or 35 mg pyridoxine HCl/kg diet) 22 weeks on epithelial expression HSPs rats exposed 1,2-dimethylhydrazine (DMH). Supplemental low diet (1 significantly reduced fecal activity intestinal alkaline phosphatase (an index damage) epithelium PCNA labeling (a marker proliferation). Analysis using ELISA indicated supplemental lowered protein HSP70 heme oxygenase-1, HSP32 (HO-1). However, real-time RT-PCR analysis revealed mRNA these were not decreased by B6, suggesting lowering mediated mechanisms involving altered gene expression. provided suppresses HO-1, targets anti-tumor agents, DMH.

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