Ovarian modulators of type 1 11beta-hydroxysteroid dehydrogenase (11betaHSD) activity and intra-follicular cortisol:cortisone ratios correlate with the clinical outcome of IVF
Thurston, L.M., Norgate, D.P., Jonas, K.C., Gregory, L., Wood, P.J., Cooke, B.A. and Michael, A.E. (2003) Ovarian modulators of type 1 11beta-hydroxysteroid dehydrogenase (11betaHSD) activity and intra-follicular cortisol:cortisone ratios correlate with the clinical outcome of IVF. Human Reproduction, 18, (8), 1603-1612. (doi:10.1093/humrep/deg322).
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Description/Abstract
BACKGROUND: Follicular fluid (FF) contains compounds that can modulate NADP(+)-dependent oxidation of cortisol by type 1 11beta-hydroxysteroid dehydrogenase (11betaHSD). The objective of this study was to investigate the relationships between levels of the ovarian modulators of type 1 11betaHSD, intra-follicular cortisol:cortisone ratios and the clinical outcome of IVF cycles.
METHODS: A single random sample of FF was aspirated from each of 132 patients undergoing gonadotrophin-stimulated IVF. Components of FF, resolved using C18 column chromatography, were evaluated for effects on NADP(+)-dependent cortisol oxidation in rat kidney homogenates. Intra- follicular steroid concentrations were measured by radioimmunoassays. Clinical pregnancies were confirmed by ultrasonography at 6 weeks post-embryo transfer.
RESULTS: Levels of the hydrophilic ovarian 11betaHSD stimuli were significantly lower (P<0.0001) and levels of the hydrophobic ovarian 11betaHSD inhibitors were significantly higher (P<0.002) in conception versus non-conception cycles. Intra-follicular cortisol:cortisone ratios increased with the degree of inhibition of 11betaHSD by the hydrophobic FF fractions. FF obtained from conception cycles had significantly higher cortisol:cortisone ratios than samples from non-conception cycles (12.9+/-0.3 versus 8.5+/-0.2, respectively; P<0.0001).
CONCLUSIONS: Conception by IVF is associated with elevated intra-follicular cortisol:cortisone ratios, which reflect low levels of ovarian stimuli and/or high levels of ovarian inhibitors of type 1 11betaHSD.
| Item Type: | Article |
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| Related URLs: | |
| Keywords: | biology, ovary, molecular biology, humans, adult, activity,non-u.s.gov't, london, in vitro, pregnancy, animals,11-beta-hydroxysteroid dehydrogenases, oxidation-reduction, methods |
| Subjects: | R Medicine > RG Gynecology and obstetrics R Medicine Q Science > QR Microbiology |
| Divisions: | University Structure - Pre August 2011 > School of Medicine > Developmental Origins of Health and Disease University Structure - Pre August 2011 > School of Medicine > Community Clinical Sciences University Structure - Pre August 2011 > School of Medicine University Structure - Pre August 2011 > School of Medicine > Human Genetics |
| Item ID: | 60316 |
| Date Deposited: | 08 Sep 2008 |
| Last Modified: | 02 Mar 2012 13:33 |
| Contributors: | Thurston, L.M. (Author) Norgate, D.P. (Author) Jonas, K.C. (Author) Gregory, L. (Author) Wood, P.J. (Author) Cooke, B.A. (Author) Michael, A.E. (Author) |
| Date: | August 2003 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/60316 |
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