alexa Anti-cancer and anti-angiogenic effects of curcumin and tetrahydrocurcumin on implanted hepatocellular carcinoma in nude mice.
Medicine

Medicine

Journal of Traditional Medicine & Clinical Naturopathy

Author(s): Yoysungnoen P, Wirachwong P, Changtam C, Suksamrarn A, Patumraj S, Yoysungnoen P, Wirachwong P, Changtam C, Suksamrarn A, Patumraj S

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Abstract AIM: To determine the effect of tetrahydrocurcumin (THC) on tumor angiogenesis compared with curcumin (CUR) by using both in vitro and in vivo models of human hepatocellular carcinoma cell line (HepG2). METHODS: The 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay was used for testing the anti-proliferating activities of CUR and THC. In male BALB/c nude mice, 2 multiply 10(6) human HepG2 cells were inoculated onto a dorsal skin-fold chamber. One day after HepG2 inoculation, the experimental groups were fed oral daily with CUR or THC (300 mg/kg or 3000 mg/kg). On d 7, 14 and 21, the tumor microvasculature was observed using fluorescence videomicroscopy and capillary vascularity (CV) was measured. RESULTS: Pathological angiogenic features including microvascular dilatation, tortuosity, and hyper-permeability were observed. CUR and THC could attenuate these pathologic features. In HepG2-groups, the CV were significantly increased on d 7 (52.43\%), 14 (69.17\%), and 21 (74.08\%), as compared to controls (33.04\%, P < 0.001). Treatment with CUR and THC resulted in significant decrease in the CV (P < 0.005 and P < 0.001, respectively). In particular, the anti-angiogenic effects of CUR and THC were dose-dependent manner. However, the beneficial effect of THC treatment than CUR was observed, in particular, from the 21 d CV (44.96\% and 52.86\%, P < 0.05). CONCLUSION: THC expressed its anti-angiogenesis without any cytotoxic activities to HepG2 cells even at the highest doses. It is suggested that anti-angiogenic properties of CUR and THC represent a common potential mechanism for their anti-cancer actions.
This article was published in World J Gastroenterol and referenced in Journal of Traditional Medicine & Clinical Naturopathy

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