Ghrelin increases intracellular Ca2+ concentration in the various hormone-producing cell types of the rat pituitary gland

► Ghrelin increases the intracellular Ca2+ in GH-, PRL-, ACTH- and LH-cells. ► GH-, PRL-, ACTH- and LH-cells express functional GHS-R1a. ► TSH-cells did not respond to ghrelin treatment.