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Growth hormone (GH) or somatotropin, also known as human growth hormone (hGH or HGH) in its human form, is a peptide hormone that stimulates growth, cell reproduction, and cell regeneration in humans and other animals. It is thus important in human development. GH also stimulates production of insulin-like growth factor 1 (IGF-1) and increases ...
Growth hormone–releasing hormone. Growth hormone–releasing hormone (GHRH), also known as somatocrinin among other names in its endogenous form and as somatorelin (INN) in its pharmaceutical form, is a releasing hormone of growth hormone (GH). It is a 44 [1] - amino acid peptide hormone produced in the arcuate nucleus of the hypothalamus.
Somatostatin, also known as growth hormone-inhibiting hormone (GHIH) or by several other names, is a peptide hormone that regulates the endocrine system and affects neurotransmission and cell proliferation via interaction with G protein-coupled somatostatin receptors and inhibition of the release of numerous secondary hormones. Somatostatin ...
Ghrelin. Ghrelin (/ ˈɡrɛlɪn /; or lenomorelin, INN) is a hormone primarily produced by enteroendocrine cells of the gastrointestinal tract, especially the stomach, [5][6] and is often called a " hunger hormone " because it increases the drive to eat. [6] Blood levels of ghrelin are highest before meals when hungry, returning to lower levels ...
The human pituitary gland is oval shaped, about 1 cm in diameter, 0.5–1 gram (0.018–0.035 oz) in weight on average, and about the size of a kidney bean. [2][3] There are two main lobes of the pituitary, an anterior lobe, and a posterior lobe joined and separated by a small intermediate lobe.
Insulin-like growth factor 1. Insulin-like growth factor 1 (IGF-1), also called somatomedin C, is a hormone similar in molecular structure to insulin which plays an important role in childhood growth, and has anabolic effects in adults. [5] In the 1950s IGF-1 was called " sulfation factor" because it stimulated sulfation of cartilage in vitro ...
This gene encodes a protein that is a transmembrane receptor for growth hormone. [10] [11] Binding of growth hormone to the receptor leads to reorientation of a pre-assembled receptor dimer dimerization (the receptor may however also exist as monomers on the cell surface [12]) and the activation of an intra- and intercellular signal transduction pathway leading to growth. [13]
Somatotropic cells constitute about 30−40% of anterior pituitary cells. [1]: 930 They release growth hormone (GH) in response to Growth hormone releasing hormone (GHRH, or somatocrinin) or are inhibited by GHIH (somatostatin), both received from the hypothalamus via the hypophyseal portal system vein and the secondary plexus.