title: Biological determination of inhibin in rat ovarian-cell culture medium.
abstract: Rat ovarian-cell culture medium contains steroids and inhibin material that are able to influence basal and LHRH-stimulated secretion of FSH and LH from dispersed pituitary cells. Studies on procedures to remove steroids, such as ethyl acetate extraction and charcoal: dextran adsorption, showed that adsorption of the culture medium with 0.5 to 1.0% charcoal and 0.05 to 0.1% dextran, respectively, was the optimal method to eliminate most of the steroids in the medium without a detrimental effect on inhibin activity. The inclusion of serum or bovine albumin in the culture medium after the culture protected the inhibin from adsorption by the charcoal: dextran treatment. The inhibin present in the rat ovarian-cell culture medium treated with 1.0% charcoal: 0.1% dextran behaved like the inhibin reference standard (from rete testis fluid of the sheep: RTFS) in the basal secretion of FSH and the LHRH-stimulated secretion of FSH and LH in the in-vitro bioassay.
mesh_terms: D000327:Adsorption; D000818:Animals; D001681:Biological Assay; D002478:Cells, Cultured; D002606:Charcoal; D003470:Culture Media; D003911:Dextrans; D005260:Female; D007265:Inhibins / Q000032:analysis*; D010053:Ovary / Q000032:analysis* / Q000166:cytology; D051381:Rats
chemical_list: D003470:Culture Media; D003911:Dextrans; D002606:Charcoal; D007265:Inhibins