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FEBS Lett. 1990 Nov 12;274(1-2):136-40.

Specific expression of human endothelin-2 (ET-2) gene in a renal adenocarcinoma cell line. Molecular cloning of cDNA encoding the precursor of ET-2 and its characterization.

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  • 1Tsukuba Research Laboratories, Takeda Chemical Industries, Ibaraki, Japan.


Analysis of culture medium of human renal adenocarcinoma cells ACHN by RP-HPLC suggested that the cells specifically secreted human endothelin-2 (ET-2). cDNAs encoding human ET-2 precursor were cloned from a cDNA library constructed with mRNA derived from the ACHN cells, and the nucleotide and deduced amino acid sequences were determined. The ET-2 cDNA was revealed to contain 1.3 kb and encode prepro-ET-2 protein consisting of 178 amino acid residues. The ET-like sequences found in the prepro-ET-1 and -ET-3 was conserved in this prepro-ET-2. The Northern blot analysis of mRNA suggested that the transcript of ET-2 gene was 1.4 kb. This is the first direct evidence that human ET-2 gene was expressed specifically in tumor cells.

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