Avtor/Urednik		Vrtačnik-Bokal, E; Fon Tacer, K; Vrbnjak, M; Lepoša, S; Virant-Klun, I; Verdenik, I; Rozman, D
Naslov		Follicular sterol composition in gonadotrophin stimulated women with polycystic ovarian syndrome
Tip		članek
Vir		Mol Cell Endocrinol
Vol. in št.		Letnik 249, št. 1-2
Leto izdaje		2006
Obseg		str. 92-98
Jezik		eng
Abstrakt		This is the first study evaluating whether oocyte development and fertilization competence are related to intrafollicular concentration of cholesterol, meiosis-activating sterols and progesterone, after human chorionic gonadotrophin (HCG) administration of women with polycystic ovarian syndrome (PCOS). The concentration of follicular fluid meiosis-activating sterol (FF-MAS) significantly increased in the periovulatory period from 10‐14 to 34‐38 h after HCG administration, while the concentration of testis meiosis-activating sterol (T-MAS) decreased, suggesting a HCG-dependent inhibition of sterol ?14-reductase. There was no correlation between follicular lanosterol, FF-MAS, T-MAS, and progesterone concentrations and the presence or absence of MII oocytes. Interestingly, free cholesterol level was significantly lower and FF-MAS/cholesterol and progesterone/cholesterol ratios significantly higher in follicles containing MII oocytes compared to follicles from which oocytes were not retrieved. Yet, fertilization and embryo quality did not correlate with follicular sterols. This knowledge should be beneficial for the implementation of protocols for in vitro maturation process, usually used in PCOS patients.
Deskriptorji		FERTILIZATION IN VITRO POLYCYSTIC OVARY SYNDROME OVULATION INDUCTION GONADOTROPINS, CHORIONIC FOLLICULAR FLUID MEIOSIS OOCYTES CHOLESTEROL PROGESTERONE FSH LH OVARIAN HYPERSTIMULATION SYNDROME