VGF | |||||||||||||||||||||||||||||||||||||||||||||||||||
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Aliases | VGF , SCG7, SgVII, VGF nerve growth factor inducible | ||||||||||||||||||||||||||||||||||||||||||||||||||
External IDs | OMIM: 602186; MGI: 1343180; HomoloGene: 2536; GeneCards: VGF; OMA:VGF - orthologs | ||||||||||||||||||||||||||||||||||||||||||||||||||
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Wikidata | |||||||||||||||||||||||||||||||||||||||||||||||||||
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VGF or VGF nerve growth factor inducible is a secreted protein and neuropeptide precursor that may play a role in regulating energy homeostasis, metabolism [5] and synaptic plasticity. [6] The protein was first discovered in 1985 by Levi et al. [7] in an experiment with PC12 cells and its name is non-acronymic. VGF gene encodes a precursor which is divided by proteolysis to polypeptides of different mass, which have a variety of functions, the best studied of which are the roles of TLQP-21 in the control of appetite and inflammation, [8] [9] [10] [11] [12] [13] [14] [15] and TLQP-62 as well as AQEE-30 in regulating depression-like behaviors [16] [17] [18] [19] [20] and memory. [21] [22] The expression of VGF and VGF-derived peptides is detected in a subset of neurons in the central and peripheral nervous systems and specific populations of endocrine cells in the adenohypophysis, adrenal medulla, gastrointestinal tract, and pancreas. [23] VGF expression is induced by NGF, CREB and BDNF and regulated by neurotrophin-3. [24] Physical exercise significantly increases VGF expression in mice hippocampal tissue and upregulates a neurotrophic signaling cascade thought to underlie the action of antidepressants. [16] [25] [26] [27]
Changes in expression of discrete VGF fragments have been detected in different neurological and psychiatric conditions. In schizophrenia, one study has shown an increase in the VGF23-62 peptide [28] and a subsequent small study demonstrated that drugs further increase the expression, pointing at a possible ameliorating action of the fragment. A decreased expression of VGF26-62 peptide was found in frontotemporal dementia [29] and the expression of a fragment containing aminoacids 378-398 was found to be changing in amyotrophic lateral sclerosis [30] and Alzheimer's disease. [31] VGF expression has also been shown in damaged peripheral nerves, and it is thought to have a role in neuropathic pain. [32] In glioblastoma, VGF has been shown to play autocrine and paracrine roles in feedback loops between differentiated glioblastoma cells and glioblastoma-specific cancer stem cells, promoting growth, survival and self-renewal. [33]