Human Reproduction, Vol 12, 2220-2225, Copyright © 1997 by Oxford University Press
M Tao, H Kodama, S Kagabu, J Fukuda, M Murata, Y Shimizu, H Hirano and T Tanaka
The aim of this study was to investigate the relationships between
follicular nitric oxide (NO) metabolite concentrations and several related
variables, with special reference to follicular interleukin- 1beta
(IL-1beta). The follicular fluid from the leading and secondary follicles
was collected individually from 20 women undergoing in-vitro fertilization
(IVF) treatment, and the concentrations of nitrite (NO2-) and nitrate
(NO3-) were determined fluorometrically using 2,3- diaminonaphthalene. Both
follicular nitrite (r = 0.42, P < 0.01) and nitrate (r = 0.49, P <
0.001) were found to be significantly correlated with follicular IL-1beta
concentrations. There were also significant positive correlations between
follicular nitrate and the number of oocytes retrieved (P < 0.01) and
serum oestradiol concentration on the day of human chorionic gonadotrophin
(HCG) administration (P < 0.05). When follicular cells were incubated in
vitro with 10 ng/ml of IL-1beta for 24 h, nitrate generation was
significantly (P < 0.01) elevated compared with the control. In
conclusion, our study demonstrates that follicular IL-1beta and the number
of developing follicles are significant variables that affect follicular NO
concentrations, and points to the possible contribution of IL-1beta to NO
generation in human preovulatory follicles.
ARTICLES
Possible contribution of follicular interleukin-1beta to nitric oxide generation in human pre-ovulatory follicles
Department of Obstetrics and Gynecology, Akita University School of Medicine, Japan.
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