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Integrin expression in normal and out-of-phase endometria
1Department of Obstetrics and Gynecology, Faculty of Medicine-University of Barcelona, Hospital Clínic i Provincial-Institut d'Investigacions Biomèdiques August Pi i Sunyer, Spain.
Human Reproduction (Oxford, England)
|January 14, 1999
Summary
Integrin alpha(v)beta3 expression is linked to endometrial maturation, appearing by postovulatory day 6-7. This finding suggests potential for predicting uterine receptivity, though further research is needed.
Area of Science:
- Reproductive Endocrinology
- Cell Biology
- Gynecology
Background:
- Integrins play a key role in endometrial receptivity.
- Specific integrin patterns, like alpha1, alpha4, and beta3 co-expression, mark the 'window of implantation'.
Purpose of the Study:
- To investigate integrin expression patterns in infertile patients.
- To correlate integrin expression with endometrial receptivity and histological dating.
Main Methods:
- Endometrial biopsies from 55 infertile patients were collected twice in one cycle (early and late luteal phases).
- Immunohistochemistry assessed integrin expression (alpha1, alpha4, beta1, beta3, beta5, alpha(v)beta3) and hormone receptors.
- Serum estradiol and progesterone levels were measured concurrently.
Main Results:
- Alpha(v)beta3 integrin glandular expression was significantly different between in-phase and out-of-phase midluteal biopsies.
- Alpha(v)beta3 integrin glandular expression was present in all late luteal phase biopsies.
- Alpha(v)beta3 expression correlated with endometrial maturation, appearing by postovulatory day 6-7 and present in all endometria dated postovulatory day >= 8.
Conclusions:
- Alpha(v)beta3 integrin expression is closely associated with endometrial histological maturation.
- Further studies are required to establish integrin expression patterns as a reliable predictor of uterine receptivity and implantation potential.