Inhibition of Progesterone Action by a Factor in Human Follicular Fluid

Summary

A factor was found in human follicular fluid that blocked progesterone-stimulated net uptake of ⁴⁵Ca²⁺ in human sperm and progesterone-induced maturation of Xenopus oocyte. The factor was partially purified by ultrafiltration through PM-10 membrane and gel filtration on Sephadex G-25 column. The active fraction is effective at a concentration of 200 μg/ml. The present findings suggest that hFF factor may regulate the metabolism of progesterone sensitive cells.

Progesterone Inhibitor - Follicular Fluid - Human Sperm - Xenopus Oocyte