Ethanol modulates metastatic potential of B16BL6 melanoma and host responses

被引:23
|
作者
Blank, SE
Meadows, GG
机构
[1] WASHINGTON STATE UNIV,DEPT PHARMACEUT SCI,PULLMAN,WA 99164
[2] WASHINGTON STATE UNIV,PHARMACOL TOXICOL GRAD PROGRAM,PULLMAN,WA 99164
关键词
ethanol; B16BL6; melanoma; metastasis; survival;
D O I
10.1111/j.1530-0277.1996.tb01664.x
中图分类号
R194 [卫生标准、卫生检查、医药管理];
学科分类号
摘要
The experimental metastatic potential (lung-colonizing ability) of B16BL6 melanoma cells was examined in C57BL/6 mice after exposure to ethanol in vitro and in vivo. In vitro, tumor cells were cultured with ethanol (0.3% v/v), or medium alone, for three passages at 5-day intervals. In vivo, B16BL6 melanoma was exposed to ethanol by administering ethanol (10% or 20% w/v) to mice following subcutaneous inoculation of tumor cells into the dorsal hip. All tumor cells were subsequently inoculated intravenously into the lateral tail Vein of water-drinking mice to assess changes in metastatic phenotype. Tumor cells cocultured in vivo with ethanol produced significantly higher numbers of superficial lung colonies, compared with tumor cells cultured in control medium. Experimental metastasis of tumor cells obtained from 20% w/v ethanol-consuming mice was also significantly increased, compared with cells obtained from water-drinking mice, Metastasis of B16BL6 melanoma cells previously obtained from mice consuming 10% w/v ethanol did not differ from controls. In other experiments, water-drinking and ethanol-consuming (2.5%, 10%, and 20% w/v) mice were inoculated subcutaneously into the dorsal hip with B16BL6 melanoma cells, and monitored for tumor growth rate and survival time. In these experiments, survival times were significantly shorter in mice consuming 20% ethanol, compared with all other groups. Subcutaneous tumor growth rate was unaffected by ethanol consumption. Lung metastasis resulting from subcutaneous tumor implantation of B16BL6 melanoma was respectively inhibited, or absent, in 10% and 20% ethanol-consuming groups. Thus, tumor growth rate and incidence of lung metastases were not apparent determinants of decreased survival in 20% ethanol-consuming mice. The results of this study indicate that the experimental metastatic potential of B16BL6 melanoma is increased during exposure to ethanol; however, metastasis from subcutaneous tumor-bearing mice is suppressed. This latter finding is consistent with previous results in which spontaneous metastasis was also suppressed after inoculation of the tumor into the pinna of the ear. Although ethanol increases the ability of B16BL6 melanoma to colonize the lung after intravenous inoculation, this effect is abated in the presence of host factors in ethanol-consuming mice.
引用
收藏
页码:624 / 628
页数:5
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