Ghrelin Antibody – Rabbit Polyclonal

This gene encodes the ghrelin-obestatin preproprotein that is cleaved to yield two peptides, ghrelin and obestatin. Ghrelin is a powerful appetite stimulant and plays an important role in energy homeostasis. Its secretion is initiated when the stomach is empty, whereupon it binds to the growth hormone secretagogue receptor in the hypothalamus which results in the secretion of growth hormone (somatotropin). Ghrelin is thought to regulate multiple activities, including hunger, reward perception via the mesolimbic pathway, gastric acid secretion, gastrointestinal motility, and pancreatic glucose-stimulated insulin secretion. It was initially proposed that obestatin plays an opposing role to ghrelin by promoting satiety and thus decreasing food intake, but this action is still debated. Recent reports suggest multiple metabolic roles for obestatin, including regulating adipocyte function and glucose metabolism. Alternative splicing results in multiple transcript variants. In addition, antisense transcripts for this gene have been identified and may potentially regulate ghrelin-obestatin preproprotein expression. [provided by RefSeq, Nov 2014]

ghrelin: a hormone that binds to the growth hormone secretagogue receptor type 1 (GHSR). Secreted by the stomach

Protein type: Secreted, signal peptide; Cell cycle regulation; Secreted; Cell development/differentiation; Apoptosis

Chromosomal Location of Human Ortholog: 3p26-p25

Cellular Component: extracellular space; axon; endoplasmic reticulum lumen; extracellular region

Molecular Function: growth hormone-releasing hormone activity; G-protein-coupled receptor binding; ghrelin receptor binding; protein tyrosine kinase activator activity

Biological Process: cortisol secretion; negative regulation of circadian sleep/wake cycle, REM sleep; positive regulation of cortisol secretion; hormone-mediated signaling; activation of MAPK activity; response to hormone stimulus; negative regulation of interleukin-6 biosynthetic process; decidualization; positive regulation of multicellular organism growth; negative regulation of insulin secretion; positive regulation of adrenocorticotropic hormone secretion; growth hormone secretion; elevation of cytosolic calcium ion concentration; negative regulation of locomotion; positive regulation of appetite; dendrite development; negative regulation of tumor necrosis factor biosynthetic process; positive regulation of circadian sleep/wake cycle, non-REM sleep; regulation of response to food; gastric acid secretion; glucose metabolic process; positive regulation of insulin secretion; adult feeding behavior; negative regulation of interleukin-1 beta production; regulation of cell proliferation; positive regulation of growth hormone secretion; positive regulation of synaptogenesis; G-protein coupled receptor protein signaling pathway; negative regulation of angiogenesis; cellular protein metabolic process; response to estrogen stimulus; cartilage development; actin polymerization and/or depolymerization; negative regulation of inflammatory response; negative regulation of endothelial cell proliferation; regulation of excitatory postsynaptic membrane potential; negative regulation of apoptosis

Disease: Obesity