The effect of methallibure (I.C.I. 33,828) on the steriodogenesis in the ovary and testis of a fresh water teleost, Cyprinus carpio

The endocrine activity of isolated follicular cells of the carp ovary in primary culture

Oocytes were isolated from the ovaries of carp females of one breed. Interstitial tissue was mechanically removed in order to obtain single oocytes surrounded only by the follicular envelope. Such a preparation was trypsinized at room temperature and also with greater success at 37 degrees C. The follicular cell suspension contained both cells and cell clumps. It was the mixture of theca (T) and granulosa (G) cells. The temperature of 37 degrees C was preferable for the successful growth of the cells in tissue culture. The cells were grown as monolayers in Leighton tubes in Medium 199 supplemented with calf serum. Activity of delta 5, 3 beta-hydroxysteroid dehydrogenase (delta 5, 3 beta-HSD) was detected in the growing cells by a histochemical test. Culture media were analyzed for estrogen, androgen, and progesterone content by appropriate radioimmunoassays. Follicular cells prior to and in culture exhibited activity of the delta 5, 3 beta-HSD and secreted steroid hormones into the culture medium.

The effect of gonadotrophins on the steroidogenesis, in the ovary and testis of gonadotrophin-deprived fresh water teleost, Cyprinus carpio

Studies have been made on the effect of LH, FSH, and LH+FSH on the gonadal steroidogenesis in gonadotrophin-deprived common carp. LH alone and in combination with FSH was more effective than FSH in stimulation of steroidogenesis.