[Differentiation of human germ cell tumor cells] - PubMed (original) (raw)
[Article in Japanese]
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- PMID: 2562098
[Differentiation of human germ cell tumor cells]
[Article in Japanese]
J Hata et al. Hum Cell. 1989 Dec.
Abstract
Human germ cell tumors are an excellent model for investigating the mechanism of human early embryogenesis as well as cellular differentiation. Three human EC cell lines, NCR-G 2, 3 and 4 were newly established from testicular mixed embryonal carcinomas in vitro, G3 and G4 cells were capable of somatic cell differentiation. The G3 cells demonstrated the most noticeable antigenetical changes with the administration of retinoic acid. SSEA-1 appeared on some cells whereas expression of HLA-A, B, C as well as 2H2, 2D7 and 5D4 antigens tended to be reduced in G3 cell line. 2H2, 2D7 and 5D4 antigens which we recently produced were immature human EC specific cell surface antigens, defined by mouse monoclonal antibodies, obtained immunization with G2 cells. The production of hCG, high molecular weight cytokeratin and intercellular matrices such as type IV collagen and laminin were inducible in G3 cells. Thus, G3 cells are thought to be one of the most pluripotent human EC cells. These findings clearly indicate that the EC cell lines we established provide an opportunity to study differentiation mechanism of human germ cell tumors and also human somatic cells.
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