Sex steroid binding protein exerts a negative control on estradiol action in MCF-7 cells (human breast cancer) through cyclic adenosine 3’,5’-monophosphate and protein kinase A. - Fortunati,N.; Fissore,F.; Fazzari,A.; Becchis,M.; Comba,A.; Catalano,M.G.; Berta,L.; Frairia,R. (Endocrinology, 1996)