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Cancer Res. 1988 Jul 1;48(13):3780-6.

Correlation of modified human papilloma virus early gene expression with altered growth properties in C4-1 cervical carcinoma cells.

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  • 1Institut für Virusforschung, Deutsches Krebsforschungszentrum, Heidelberg, Federal Republic of Germany.


In cervical carcinomas and cell lines derived from these tumors the DNA of specific types of human papilloma viruses (HPVs) is integrated into the host cell genome. The two viral open reading frames E6 and E7 are consistently transcribed in tumors and cell lines, and the respective proteins were detected in cells cultured in vitro. As shown here, modulation of HPV 18 E6 and E7 gene expression in C4-1 cervical carcinoma cells is accompanied by an altered cell growth. HPV 18 E6 and E7 expression can be enhanced by glucocorticoid treatment of C4-1 cells, and an increased cell proliferation is observed. In contrast, after introduction of complementary RNA to the HPV 18 E6 and E7 open reading frames, their expression is inhibited, and decreased cell growth is observed. These results support the hypothesis that expression of HPV E6 and E7 open reading frames is directly involved in growth regulation of cervical carcinoma cells.

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