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Pituitary gonadotropin releasing hormone (GnRH) receptor levels in intact and ovariectomized-adrenalectomized female golden hamsters on a short photoperiod |
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| Authors: | D R Pieper M M Samyn M G Subramanian |
| Institution: | (1) Dept of Biology and Health Sciences, The University of Detroit, 4001 W. McNichols Rd, 48221 Detroit, Michigan, USA;(2) Dept of Physiology, Providence Hospital, 16001 W. Nine Mile Rd, 48037 Southfield, Michigan, USA;(3) Dept of Obstetrics and Gynecology, Wayne State University, 48201 Detroit, Michigan, USA |
| Abstract: | Summary Both intact and ovariectomized+adrenalectomized hamsters on a short photoperiod, had a daily surge in plasma LH at approximately 16.00–18.00 h. The number of pituitary GnRH receptors was generally lower in ovariectomized+adrenalectomized hamsters than in intact animals, but both intact and ovariectomized+adrenalectomized hamsters had a decrease in the number of receptors just prior to the LH surge. These results show that gonadal steroids are not involved in regulating the pre-LH surge fall in the number of GnRH receptors. |
| Keywords: | Gonadotropin releasing hormone GnRH GnRH receptors hamsters photoperiod |
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