Epidermal growth factor differentially regulates activin subunits in the zebrafish ovarian follicle cells via diverse signaling pathways

► Epidermal growth factor stimulates expression of all activin subunits in the zebrafish ovary. ► EGF regulates activin subunits via diverse signaling pathways in the follicle cells. ► EGF stimulation of inhbaa and inhbb involves MAPK, p38 MAPK, PKC and PKA pathways. ► EGF stimulation of inhbab involves PI3K/Akt pathway.