Human Reproduction, Vol. 15, No. 6, 1295-1299,
June 2000
© 2000 European Society of Human Reproduction and Embryology
Follicular fluid concentrations of adrenomedullin, vascular endothelial growth factor and nitric oxide in IVF cycles: relationship to ovarian response
1 Institut Clínic of Gynaecology, Obstetrics and Neonatology and 2 Hormonal Laboratory, Faculty of Medicine-University of Barcelona, Hospital Clínic-Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
Marked granulosa cell proliferation along with important changes in the vascular bed of the ovary characterize IVF cycles associated with multiple follicular growth and maturation. The present report investigated follicular fluid (FF) and circulating concentrations of adrenomedullin, vascular endothelial growth factor (VEGF) and nitric oxide (NO) in 70 IVF patients (14 of whom became pregnant); these three vasoactive substances may be implicated in extensive ovarian tissue remodelling. Serum and FF concentrations of oestradiol and progesterone were also measured in the 70 IVF cycles studied. Follicular fluid concentrations of VEGF and adrenomedullin but not nitrite/nitrate (the two stable oxidation products of NO metabolism) were significantly higher (P < 0.0001) than the corresponding circulating concentrations. Follicular fluid concentrations of oestradiol and progesterone were not correlated with those of adrenomedullin, VEGF or nitrite/nitrate. No relationship existed between circulating concentrations of adrenomedullin, VEGF or nitrite/nitrate on the day of oocyte aspiration and parameters of ovarian response to gonadotrophin stimulation. In contrast, FF adrenomedullin concentration showed a direct relationship with day 3 FSH serum concentration (r = 0.53, P < 0.01) and the number of ampoules of gonadotrophin administered (r = 0.36, P < 0.005), but an inverse correlation with the total number of oocytes retrieved (r = –0.29, P < 0.01) and the number of mature oocytes (r = –0.25, P < 0.05). A positive correlation was found for FF VEGF concentration and chronological age (r = 0.29, P < 0.05) and ampoules of gonadotrophins administered (r = 0.30, P < 0.05). There was no relationship between nitrite/nitrate FF concentrations and parameters of ovarian response. Neither serum concentrations nor FF concentrations of adrenomedullin, VEGF or nitrite/nitrate were correlated with IVF outcome. This study suggested for the first time that increased FF concentrations of adrenomedullin can be a marker of decreased ovarian response in IVF. Our results also provide further evidence favouring an association between FF VEGF and patient's age, while on the basis of our findings NO measurements are not a useful marker of ovarian response.
Key words: adrenomedullin/IVF/nitric oxide/ovarian response/VEGF
3 To whom correspondence should be addressed at: Institut Clínic of Gynaecology and Obstetrics, Hospital Clínic; C/Casanova 143; 08036-Barcelona, Spain. E-mail: jbalasch{at}medicina.ub.es
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