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Cell Struct Funct. 1996 Apr;21(2):143-50.

Induction of mcl1/EAT, Bcl-2 related gene, by retinoic acid or heat shock in the human embryonal carcinoma cells, NCR-G3.

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  • 1Department of Pathology, Keio University School of Medicine, Tokyo, Japan.


NCR-G3 cells were established from a testicular embryonal carcinoma and were differentiated into multi-lineages including trophectoderm cells by exposure to retinoic acid. The differentiated cells began to produce human chorionic gonadotropin (hCG), a trophectoderm-specific hormone, which was regulated at the mRNA level. As we assumed that genes responsible for differentiation were differentially expressed at the early stage of retinoic acid-induced differentiation, we prepared a cDNA library from retinoic acid-treated NCR-G3 cells. This cDNA library was then screened for genes whose expression was induced during the differentiation of these cells. From about 5 x 10(4) clones screened, three independent sequences were isolated. Sequencing analysis revealed that clone 1002 codes for mcl1/EAT, which has a Bcl-2 homology domain. The expression of mcl1/EAT, the Bcl-2 related gene, was increased at an early stage of the retinoic acid-induced differentiation and preceded the up-regulation of cytokeratin and hCG genes after ratinoic acid treatment. Furthermore, mcl1/EAT was also up-regulated by heat shock, which has recently been shown to induce the cells to differentiate.

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