Immunohistochemical localization of cholesterol side-chain-cleavage, 17α-hydroxylase and aromatase cytochromes P-450 was performed in 35 morphologically normal human premenopausal ovaries by using specific antibodies against the enzymes. In well-developed ovarian follicles in the late stages of follicular growth, immunoreactivity of P-450(AROM) was only seen in granulosa cells while P-450(17α) and P-450(SCC) activity was confined to theca interna cells, confirming that follicular oestrogen is produced in granulosa cells by the aromatization of androgens derived from the theca interna cells. In the corpus luteum, this functional differentiation is maintained, since immunoreactivity of P-450(AROM) was exclusively present in luteinized granulosa cells while that of P-450(17α) was present in luteinized theca cells. Immunoreactivity of P-450(SCC) was present in both types of cells in the corpus luteum.
|Number of pages||7|
|Journal||Journal of Reproduction and Fertility|
|Publication status||Published - 1989|
ASJC Scopus subject areas
- Molecular Biology
- Obstetrics and Gynaecology
- Developmental Biology