title: Receptor interacting protein 140 regulates expression of uncoupling protein 1 in adipocytes through specific peroxisome proliferator activated receptor isoforms and estrogen-related receptor alpha.
abstract: Expression of uncoupling protein 1 (Ucp1) mRNA is elevated in differentiated adipocytes derived from brown or white adipose tissue devoid of the nuclear receptor corepressor receptor interacting protein 140 (RIP140). Increased expression is mediated in part by the recruitment of peroxisome proliferator activated receptors alpha and gamma, together with estrogen-related receptor alpha, which functions through a novel binding site on the Ucp1 enhancer. This demonstrates that regulation of Ucp1 expression in the absence of RIP140 involves derepression of at least three different nuclear receptors. The ability to increase expression of Ucp1 by beta-adrenergic signaling is independent of RIP140, as shown by the action of the beta(3)-adrenergic agonist CL 316,243 to stimulate expression in both brown and white adipocytes in the presence and absence of the corepressor. Therefore, the expression of this metabolic uncoupling protein in adipose cells is regulated by inhibition as well as activation of distinct signaling pathways.
authors: Institute of Reproductive and Developmental Biology, Imperial College London, London W12 0NN, United Kingdom.
authors: Darja
authors: D
authors: Debevec
authors: Mark
authors: M
authors: Christian
authors: Daniel
authors: D
authors: Morganstein
authors: Asha
authors: A
authors: Seth
authors: Birger
authors: B
authors: Herzog
authors: Malcolm
authors: M
authors: Parker
authors: Roger
authors: R
authors: White
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D017667:Adipocytes / Q000378:metabolism*; D002001:Adipose Tissue, Brown / Q000378:metabolism; D000818:Animals; D001483:Base Sequence; D001665:Binding Sites / Q000235:genetics; D002478:Cells, Cultured; D017931:DNA Primers / Q000235:genetics; D004742:Enhancer Elements, Genetic; D005786:Gene Expression Regulation; D066298:In Vitro Techniques; D007473:Ion Channels / Q000235:genetics*; D051379:Mice; D018345:Mice, Knockout; D024101:Mitochondrial Proteins / Q000235:genetics*; D009687:Nuclear Proteins / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D000078723:Nuclear Receptor Interacting Protein 1; D047493:PPAR alpha / Q000378:metabolism*; D047495:PPAR gamma / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D022702:Receptors, Adrenergic, beta-3 / Q000378:metabolism; D011960:Receptors, Estrogen / Q000378:metabolism*; D015398:Signal Transduction; D015533:Transcriptional Activation; D000071256:Uncoupling Protein 1; D000097983:ERRalpha Estrogen-Related Receptor
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D017931:DNA Primers; D007473:Ion Channels; D024101:Mitochondrial Proteins; D009687:Nuclear Proteins; D000078723:Nuclear Receptor Interacting Protein 1; D047493:PPAR alpha; D047495:PPAR gamma; D012333:RNA, Messenger; D022702:Receptors, Adrenergic, beta-3; D011960:Receptors, Estrogen; D000071256:Uncoupling Protein 1; D000097983:ERRalpha Estrogen-Related Receptor; C000604372:Ucp1 protein, mouse