thyrotropin-releasing hormone ( trh ) stimulates hydrolysis of phosphatidylinositol 4,5-bisphosphate ( ptdins-4,5-p2 ) by a phospholipase c ( or phosphodiesterase ) and elevates cytoplasmic-free ca2+ concentration ( [ ca2+ ] i ) in gh3 pituitary cells .
C0040162
thyrotropin-releasing hormone
C0032002
pituitary