PMID- 9989288 OWN - NLM STAT- MEDLINE DCOM- 19990304 LR - 20220310 IS - 0006-3002 (Print) IS - 0006-3002 (Linking) VI - 1436 IP - 3 DP - 1999 Jan 4 TI - Tumor necrosis factor-alpha regulates in vivo expression of the rat UCP family differentially. PG - 585-92 AB - A family of uncoupling proteins (UCPs), free fatty acid anion transporters, plays a crucial role in energy homeostatic thermoregulation. Tumor necrosis factor-alpha (TNF-alpha), a member of the cytokine family, is well known as an endogenous pyrogen. To evaluate the interaction of TNF-alpha with UCPs in thermogenesis, effects of TNF-alpha on rat UCP gene expression were examined in intrascapular brown adipose tissue (BAT), epididymal white adipose tissue (WAT) and soleus muscle (Muscle). Administration of TNF-alpha elevated rectal temperature by 0.7 degree C as well as serum leptin which peaked at 6 h, compared with saline controls. BAT UCP1 mRNA expression was increased by 1.2-fold at 6 h after the TNF-alpha treatment and decreased by 0.8-fold at 16 h after the treatment. In contrast to UCP1 expression in BAT, UCP2 mRNA expressions in BAT, WAT, and Muscle was increased to reach maximum levels of 1.3-, 1.6- and 1.8-fold, respectively, at 16 h after the treatment. UCP3 mRNA in Muscle, but not in BAT or WAT, was exclusively up-regulated by 1.7-fold at 16 h after the treatment. These results indicate that TNF-alpha up-regulates UCP gene expression differentially and tissue dependently, and add novel insights into thermogenesis under conditions of malignancy and inflammation. FAU - Masaki, T AU - Masaki T AD - Department of Internal Medicine 1, School of Medicine, Oita Medical University, Japan. FAU - Yoshimatsu, H AU - Yoshimatsu H FAU - Chiba, S AU - Chiba S FAU - Hidaka, S AU - Hidaka S FAU - Tajima, D AU - Tajima D FAU - Kakuma, T AU - Kakuma T FAU - Kurokawa, M AU - Kurokawa M FAU - Sakata, T AU - Sakata T LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Biochim Biophys Acta JT - Biochimica et biophysica acta JID - 0217513 RN - 0 (Carrier Proteins) RN - 0 (DNA Probes) RN - 0 (Ion Channels) RN - 0 (Leptin) RN - 0 (Membrane Proteins) RN - 0 (Membrane Transport Proteins) RN - 0 (Mitochondrial Proteins) RN - 0 (Proteins) RN - 0 (RNA, Messenger) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Ucp1 protein, rat) RN - 0 (Ucp2 protein, rat) RN - 0 (Uncoupling Agents) RN - 0 (Uncoupling Protein 1) RN - 0 (Uncoupling Protein 2) SB - IM MH - Adipose Tissue/drug effects/metabolism MH - Adipose Tissue, Brown/drug effects/metabolism MH - Animals MH - Base Sequence MH - Body Temperature Regulation/drug effects MH - Carrier Proteins/*genetics MH - DNA Probes/genetics MH - Ion Channels MH - Leptin MH - Male MH - Membrane Proteins/*genetics MH - *Membrane Transport Proteins MH - *Mitochondrial Proteins MH - Muscle, Skeletal/drug effects/metabolism MH - Proteins/*genetics/metabolism MH - RNA, Messenger/genetics/metabolism MH - Rats MH - Rats, Wistar MH - Tissue Distribution MH - Tumor Necrosis Factor-alpha/*pharmacology MH - Uncoupling Agents/*metabolism MH - Uncoupling Protein 1 MH - Uncoupling Protein 2 MH - Up-Regulation/drug effects EDAT- 1999/02/16 00:00 MHDA- 1999/02/16 00:01 CRDT- 1999/02/16 00:00 PHST- 1999/02/16 00:00 [pubmed] PHST- 1999/02/16 00:01 [medline] PHST- 1999/02/16 00:00 [entrez] AID - S0005-2760(98)00173-8 [pii] AID - 10.1016/s0005-2760(98)00173-8 [doi] PST - ppublish SO - Biochim Biophys Acta. 1999 Jan 4;1436(3):585-92. doi: 10.1016/s0005-2760(98)00173-8.