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    Biochem Biophys Res Commun. 1993 Sep 15;195(2):717-22.

    Gene expression of mutant erythropoietin in hepatocellular carcinoma.

    Funakoshi A, Muta H, Baba T, Shimizu S.

    Department of Gastroenterology, National Kyushu Cancer Center, Fukuoka, Japan.

    A case of hepatocellular carcinoma complicated by erythrocytosis showed an increased level of serum immunoreactive erythropoietin (EPO) and EPO bioactivity. RT-PCR (reverse transcriptase and polymerase chain reaction) of EPO mRNA extracted from a surgical specimen indicated high expression of EPO mRNA in the tumor tissue. The nucleotide sequences of PCR amplified regions of the EPO precursor mRNA in tumor tissue showed three differences to those of normal EPO cDNA. The deduced amino acid sequence of the coding region also showed three differences from that of normal EPO. The erythrocytosis improved and the high serum EPO immunoreactive and bioactive level decreased after resection of the tumor. This is the first demonstration of mutant EPO mRNA expression and bioactive mutant EPO protein in hepatocellular carcinoma tissue.

    PMID: 8396923 [PubMed - indexed for MEDLINE]

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