Regulation of Human Papillomavirus Type 18in Vivo:Effects of Estrogen and Progesterone in Transgenic Mice

We examined thein vivoeffect of estrogen, progesterone, RU 486, and pregnancy on the upstream regulatory region (URR) of human papillomavirus (HPV) 18 transgenic mice. The mice contain the bacterial reporter β-galactosidase gene under control of the HPV 18 URR. Pregnant transgenic mice were sacrific...

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Veröffentlicht in:Gynecologic oncology 1997-08, Vol.66 (2), p.202-208
Hauptverfasser: Michelin, David, Gissmann, Lutz, Street, Daron, Potkul, Ronald K., Fisher, Susan, Kaufmann, Andreas M., Qiao, Liang, Schreckenberger, Carola
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container_end_page 208
container_issue 2
container_start_page 202
container_title Gynecologic oncology
container_volume 66
creator Michelin, David
Gissmann, Lutz
Street, Daron
Potkul, Ronald K.
Fisher, Susan
Kaufmann, Andreas M.
Qiao, Liang
Schreckenberger, Carola
description We examined thein vivoeffect of estrogen, progesterone, RU 486, and pregnancy on the upstream regulatory region (URR) of human papillomavirus (HPV) 18 transgenic mice. The mice contain the bacterial reporter β-galactosidase gene under control of the HPV 18 URR. Pregnant transgenic mice were sacrificed on various days of gestation and the level of URR activation was determined. Another group of female transgenic mice was ovariectomized at 4 to 6 weeks of age. Pellets of estradiol, progesterone, progesterone + RU 486, or placebo were implanted 1 to 2 weeks after ovariectomy. Mice were sacrificed after pellet implantation to examine acute and chronic effects. Marked increases in URR activation during pregnancy were observed. Progesterone was found to activate the URR acutely. Significantly higher activation was demonstrated at 24 hr in the progesterone group compared to placebo (P< 0.01). Activation with progesterone at 24 hr was significantly higher than at any other time point (P< 0.001). A trend toward decreasing activation over time was demonstrated in the progesterone group (r= −0.87,P= 0.0001). RU 486 does not block the activation of progesterone in our model. Estradiol activates the URR acutely compared to placebo (P= 0.034). Thisin vivomodel demonstrates activation of the URR in response to exogenous estrogen, progesterone, and pregnancy. These data may have clinical implications for women who harbor high-risk HPV.
doi_str_mv 10.1006/gyno.1997.4745
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RU 486 does not block the activation of progesterone in our model. Estradiol activates the URR acutely compared to placebo (P= 0.034). Thisin vivomodel demonstrates activation of the URR in response to exogenous estrogen, progesterone, and pregnancy. 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title Regulation of Human Papillomavirus Type 18in Vivo:Effects of Estrogen and Progesterone in Transgenic Mice
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