Growth Hormone Releasing Hormone

Definition 1

This protein belongs to the glucagon family and is a preproprotein that is produced in the hypothalamus. The preproprotein is cleaved to form a 44 aa factor, also called somatocrinin, that acts to stimulate growth hormone release from the pituitary. Variant receptors for somatocrinin have been found in several types of tumors, and antagonists of these receptors can inhibit the growth of the tumors. Defects in the gene are a cause of dwarfism, while hypersecretion of the encoded protein is a cause of gigantism. (from RefSeq) (NCI Thesaurus)

Definition 2

A polypeptide hormone produced in the HYPOTHALAMUS, and other tissues and organs. It inhibits the release of growth hormone (SOMATOTROPIN), and also modulates important physiological functions of the kidney, pancreas, and gastrointestinal tract. Somatostatin receptors are widely expressed throughout the body. Somatostatin also acts as a neurotransmitter in the central and peripheral nervous systems. (NLM, Medical Subject Headings)

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