| First Author | Kakizaki S | Year | 2001 |
| Journal | Int J Vitam Nutr Res | Volume | 71 |
| Issue | 5 | Pages | 261-7 |
| PubMed ID | 11725690 | Mgi Jnum | J:72993 |
| Mgi Id | MGI:2154114 | Doi | 10.1024/0300-9831.71.5.261 |
| Citation | Kakizaki S, et al. (2001) Effect of alpha-tocopherol on hepatocarcinogenesis in transforming growth factor-alpha (TGF-alpha) transgenic mice treated with diethylnitrosamine. Int J Vitam Nutr Res 71(5):261-7 |
| abstractText | To examine the potentially chemopreventive effects of alpha-tocopherol on hepatocarcinogenesis, we fed the transgenic mice line MT42, which overexpresses transforming growth factor-alpha (TGF-alpha) and which has been established as having a high incidence of liver tumor, with different concentrations of alpha-tocopherol and examined the hepatic tumorigenesis of these mice. At 3 weeks of age, MT42 male mice received a single intraperitoneal injection of diethylnitrosamine (DEN), 5 mg/kg body weight, to initiate the formation of liver tumors. The mice were divided into three groups: group A, control diet (20 mg/kg of alpha-tocopherylacetate); group B, deficient diet (less than 1 mg/kg); group C, supplemented diet (500 mg/kg). Neoplastic change was determined at 40 weeks of age. The incidence of adenomas (p < 0.05), the maximum tumor size (p < 0.01), the mean relative liver weight (p < 0.01), and the proliferating cell nuclear antigen (PCNA) labeling indices of the non-tumor sites (p < 0.01) of group B were significantly higher than those of group C. No toxic effects of alpha-tocopherol were found. Alpha-tocopherol-deficient diet accelerated the hepatocarcinogenesis of TGF-alpha transgenic mice treated with DEN. At best, these data demonstrate that alpha-tocopherol-deficiency is not beneficial for prevention of hepatocarcinogenesis in this model. Alpha-tocopherol may be useful for the chemoprevention for liver cancer. |
