title: Rapid interaction between luteinizing hormone and isolated rabbit follicles.
abstract: The rapidity of binding of LH to rabbit ovarian follicles was examined using androgen production as the endpoint. Incubations were carried out for about 8 h with medium being changed every 15 min except during the periods when follicles were exposed to LH and/or anti-LH and subsequent washing. Exposure of follicles to LH for 1 s followed by washing in (a) LH-free medium, (b) pure anti-LH or (c) diluted anti-LH, failed to inhibit androgen production which persisted for more than 2 h. Simultaneous addition of anti-LH and LH to the medium before incubation with follicles completely inhibited the response though it could be elicited from the same follicles when LH was added later. These data suggest that the binding of LH to follicular receptors is a rapid process and that either the LH-receptor complex is very stable or that LH initiates a series of reactions which are independent of the presence of hormone.
mesh_terms: D000728:Androgens / Q000096:biosynthesis; D000818:Animals; D000906:Antibodies; D001665:Binding Sites; D005260:Female; D066298:In Vitro Techniques; D007986:Luteinizing Hormone / Q000276:immunology / Q000378:metabolism*; D006080:Ovarian Follicle / Q000378:metabolism*; D011817:Rabbits
chemical_list: D000728:Androgens; D000906:Antibodies; D007986:Luteinizing Hormone