Πλοήγηση ανά Συγγραφέα "Kollios, G."
-
Absence of leptin expression and secretion by human luteinized granulosa cells
Karamouti, M.; Kollia, P.; Karligiotou, E.; Kallitsaris, A.; Prapas, N.; Kollios, G.; Seferiadis, K.; Vamvakopoulos, N.; Messinis, I. E. (2003)Whether leptin is secreted by the human ovary is not known. The available data on leptin gene (ob gene) expression by human granulosa cells are conflicting. The aim of the present study was first to re-examine the expression ... -
Changes in gonadotrophin response to gonadotrophin releasing hormone in normal women following bilateral ovariectomy
Alexandris, E.; Milingos, S.; Kollios, G.; Seferiadis, K.; Lolis, D.; Messinis, I. E. (1997)OBJECTIVE Pituitary responsiveness to GnRH varies throughout the normal menstrual cycle, We have investigated whether there are differences in the ovarian mechanisms which regulate gonadotrophin secretion between the ... -
Changes in pituitary response to gonadotropin releasing hormone following bilateral ovariectomy in women treated with follicle-stimulating hormone
Messinis, I. E.; Milingos, S.; Kollios, G.; Seferiadis, K.; Papanikolaou, N.; Lolis, D. (1996)Superovulation induction in women attenuates the pituitary response to gonadotropin-releasing hormone (GnRH). The aim of this study was to assess the duration of the suppressing activity of the ovaries on the pituitary. ... -
Effect of treatment with oestrogen and progesterone on serum leptin concentrations in normal women
Papageorgiou, I.; Milingos, S.; Asprodini, E.; Kollios, G.; Seferiadis, K.; Messinis, I. E. (2000) -
Endothelin-3 and PRL levels in the maternal and fetal circulation at delivery
Dafopoulos, K.; Boli, A.; Kallitsaris, A.; Malamitsi-Puchner, A.; Kollios, G.; Messinis, I. E. (2007)Objective: The aim of the present cross-sectional study was to test the hypothesis that endothelin-3 (ET-3) is involved in PRL secretion via systemic hormonal interaction during labor. Materials and methods: Fifty healthy ... -
Endothelin-3 and prolactin levels in the maternal and fetal circulation at delivery
Dafopoulos, K.; Boli, A.; Kallitsaris, A.; Malamitsi-Puchner, A.; Kollios, G.; Messinis, I. E. (2006) -
Evidence of differential control of FSH and LH responses to GnRH by ovarian steroids in the luteal phase of the cycle
Messinis, I. E.; Milingos, S.; Alexandris, E.; Mademtzis, I.; Kollios, G.; Seferiadis, K. (2002)BACKGROUND: It is known that during the follicular phase of the cycle, estradiol sensitizes the pituitary to GnRH. The aim of this study was to determine the role of ovarian steroids in the control of GnRH-induced gonadotrophin ... -
Growth hormone, insulin-like growth factor I, and leptin interaction in human cultured lutein granulosa cells steroidogenesis
Karamouti, M.; Kollia, P.; Kallitsaris, A.; Vamvakopoulos, N.; Kollios, G.; Messinis, I. E. (2008)Objective: To investigate the effect of leptin on the actions of growth hormone (GH) and insulin-like growth factor-I (IGF-I) in ovarian steroidogenesis in vitro. Design: In vitro cell culture study. Setting: Research ... -
Leptin concentrations in normal women following bilateral ovariectomy
Messinis, I. E.; Mhingos, S. D.; Alexandris, E.; Kariotis, I.; Kollios, G.; Seferiadis, K. (1999)To study the relationships between gonadal steroids and leptin, 20 women with normal cycles were investigated during the postoperative period following a laparotomy. Fourteen women underwent bilateral ovariectomy plus total ... -
Leptin concentrations in the follicular phase of spontaneous cycles and cycles superovulated with follicle stimulating hormone
Messinis, I. E.; Milingos, S.; Zikopoulos, K.; Kollios, G.; Seferiadis, K.; Lolis, D. (1998)It has been reported that oestradiol may play a role in the production of leptin from adipocytes, To investigate this relationship further, nine normally ovulating women were studied during two menstrual cycles, i.e. an ... -
Modulating effect of leptin on basal and follicle stimulating hormone stimulated steroidogenesis in cultured human lutein granulosa cells
Karamouti, M.; Kollia, P.; Kallitsaris, A.; Vamvakopoulos, N.; Kollios, G.; Messinis, I. E. (2009)Background: In vitro data have shown conflicting results in terms of the effect of leptin on granulosa cells steroidogenesis. Aim: The aim of the present study was to investigate the effect of low and high doses of leptin ... -
Oestradiol plus progesterone treatment increases serum leptin concentrations in normal women
Messinis, I. E.; Papageorgiou, I.; Milingos, S.; Asprodini, E.; Kollios, G.; Seferiadis, K. (2001)BACKGROUND: Previous studies have alluded to a role for both oestradiol and progesterone in the secretion of leptin from fat cells in the human, although direct evidence has yet to be obtained. The study aim was to assess ... -
Treatment of normal women with oestradiol plus progesterone prevents the decrease of leptin concentrations induced by ovariectomy
Messinis, I. E.; Kariotis, I.; Milingos, S.; Kollios, G.; Seferiadis, K. (2000)To study the role of oestradiol and progesterone in the secretion of leptin, 21 normally ovulating women were recruited from those scheduled for ovariectomy plus hysterectomy performed in mid-follicular phase of the cycle. ...