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  • Title: Elevated serum alpha-fetoprotein level of nude mice bearing hepatoma cells by treatment with monoclonal antibodies to alpha-fetoprotein.
    Author: Masuda K, Nagata S, Hirano K, Takagishi Y, Hirai H.
    Journal: Biochim Biophys Acta; 1993 Sep 08; 1182(2):128-32. PubMed ID: 7689341.
    Abstract:
    This study was carried out to clarify the reason for elevation of serum alpha-fetoprotein (AFP) level of nude mice bearing hepatoma cells after treatment with monoclonal antibodies (MoAbs) to AFP. MoAbs to AFP showed no effect on the cumulative amounts of AFP secreted from human hepatoma cell line, HuH-7, in vitro. However, the treatment of nude mice bearing HuH-7N cells (HuH-7 xenograft) with MoAbs to AFP led to elevation of the serum AFP level in spite of the fact that the growth curve of HuH-7N cells was similar to that for PBS treatment. This apparent elevation of the serum AFP level is thought to be due to the slow elimination of AFP-MoAb immune complexes with little lattice structure from circulation, but not the enhancement of AFP secretion of HuH-7N cells. Thus, when using a MoAb alone or MoAb-drug conjugate, the serum AFP level should only be cautiously used as a tumor marker for evaluating the targeting immunotherapy.
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