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Serum alpha-fetoprotein in a mouse strain (C3H-Avy fB) with spontaneous hepatocellular carcinomas.

In a study of the association between circulating alpha-fetoprotein concentrations and spontaneous hepatocellular carcinomas, we examined C3H-Avy fB mice, which with age consistently demonstrate a rapidly increasing incidence of hepatic cancer. Although elevated alpha-fetoprotein levels are observed in association with the majority of these tumors, no elevation of alpha-fetoprotein was observed during the life course of non-tumor-bearing mice despite their age-dependent risk for hepatic cancer. Therefore, whatever the evolutionary or age-related biological changes may be that lead to tumor formation in this mouse, they are not linked to the synthesis of significant amounts of this oncofetal protein.