出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/10/31 10:44:49」(JST)
Peroxisome proliferator-activated receptor delta | |||||||||||||
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PDB rendering based on 1gwx. |
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Identifiers | |||||||||||||
Symbols | PPARD; FAAR; NR1C2; NUC1; NUCI; NUCII; PPARB | ||||||||||||
External IDs | OMIM: 600409 MGI: 101884 HomoloGene: 4544 IUPHAR: NR1C2 ChEMBL: 3979 GeneCards: PPARD Gene | ||||||||||||
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RNA expression pattern | |||||||||||||
More reference expression data | |||||||||||||
Orthologs | |||||||||||||
Species | Human | Mouse | |||||||||||
Entrez | 5467 | 19015 | |||||||||||
Ensembl | ENSG00000112033 | ENSMUSG00000002250 | |||||||||||
UniProt | Q03181 | P35396 | |||||||||||
RefSeq (mRNA) | NM_001171818 | NM_011145 | |||||||||||
RefSeq (protein) | NP_001165289 | NP_035275 | |||||||||||
Location (UCSC) | Chr 6: 35.31 – 35.4 Mb |
Chr 17: 28.23 – 28.3 Mb |
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PubMed search | [1] | [2] | |||||||||||
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Peroxisome proliferator-activated receptor beta or delta (PPAR-β or PPAR-δ), also known as NR1C2 (nuclear receptor subfamily 1, group C, member 2) is a nuclear receptor that in humans is encoded by the PPARD gene.[1]
This gene encodes a member of the peroxisome proliferator-activated receptor (PPAR) family. It was first identified in Xenopus in 1993.[2]
PPARδ is a nuclear hormone receptor that governs a variety of biological processes and may be involved in the development of several chronic diseases, including diabetes, obesity, atherosclerosis, and cancer.[3][4]
PPARδ may function as an integrator of transcription repression and nuclear receptor signaling. It activates transcription of a variety of target genes by binding to specific DNA elements. Well described target genes of PPARδ include PDK4, ANGPTL4, PLIN2, and CD36. The expression of this gene is found to be elevated in colorectal cancer cells.[5] The elevated expression can be repressed by adenomatosis polyposis coli (APC), a tumor suppressor protein involved in the APC/beta-catenin signaling pathway. Knockout studies in mice suggested the role of this protein in myelination of the corpus callosum, epidermal cell proliferation, and glucose[6] and lipid metabolism.[7]
This protein has been shown to be involved in differentiation, lipid accumulation,[8] directional sensing, polarization, and migration in keratinocytes.[9]
Studies into the role of PPAR-δ in cancer have produced contradictory results and there is no scientific consensus on whether it promotes or prevents cancer formation.[10][11]
In one study, polymorphisms of PPARD were found to be associated with bipolar disorder.[12]
Several high affinity ligands for PPAR-δ/β have been developed, including GW 501516 and GW0742, which play an important role in research. In one study utilizing such a ligand, it has been shown that agonism of PPAR-δ changes the body's fuel preference from glucose to lipids.[13]
PPAR-δ/β is highly expressed in many tissues, including colon, small intestine, liver and keratinocytes, as well as in heart, spleen, skeletal muscle, lung, brain and thymus.[14]
Knockout mice lacking the ligand binding domain of PPAR-δ/β are viable. However these mice are smaller than the wild type both neo and postnatally. In addition, fat stores in the gonads of the mutants are smaller. The mutants also display increased epidermal hyperplasia upon induction with TPA.[15]
PPARδ is activated in the cell by various fatty acids and fatty acid derivatives. Several synthetic ligands have been identified that selectively bind PPARδ.
Peroxisome proliferator-activated receptor delta has been shown to interact with HDAC3[17][18] and NCOR2.[18]
This article incorporates text from the United States National Library of Medicine, which is in the public domain.
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リンク元 | 「PPARβ」「PPAR-β」「ペルオキシソーム増殖剤活性化受容体β」「peroxisome proliferator-activated receptor beta」 |
関連記事 | 「PPAR」「PP」「PPA」「beta」「be」 |
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