PMID- 16638016 OWN - NLM STAT- MEDLINE DCOM- 20060816 LR - 20111117 IS - 0022-3042 (Print) IS - 0022-3042 (Linking) VI - 98 IP - 1 DP - 2006 Jul TI - Tumor necrosis factor-alpha activates signal transduction in hypothalamus and modulates the expression of pro-inflammatory proteins and orexigenic/anorexigenic neurotransmitters. PG - 203-12 AB - Tumor necrosis factor-alpha (TNF-alpha) is known to participate in the wastage syndrome that accompanies cancer and severe infectious diseases. More recently, a role for TNF-alpha in the pathogenesis of type 2 diabetes mellitus and obesity has been shown. Much of the regulatory action exerted by TNF-alpha upon the control of energy stores depends on its action on the hypothalamus. In this study, we show that TNF-alpha activates canonical pro-inflammatory signal transduction pathways in the hypothalamus of rats. These signaling events lead to the transcriptional activation of an early responsive gene and to the induction of expression of cytokines and a cytokine responsive protein such as interleukin-1beta, interleukin-6, interleukin-10 and suppressor of cytokine signalling-3, respectively. In addition, TNF-alpha induces the expression of neurotransmitters involved in the control of feeding and thermogenesis. Thus, TNF-alpha may act directly in the hypothalamus inducing a pro-inflammatory response and the modulation of expression of neurotransmitters involved in energy homeostasis. FAU - Amaral, Maria E AU - Amaral ME AD - Department of Internal Medicine, State University of Campinas, Sao Paulo, Brazil. FAU - Barbuio, Raquel AU - Barbuio R FAU - Milanski, Marciane AU - Milanski M FAU - Romanatto, Talita AU - Romanatto T FAU - Barbosa, Helena C AU - Barbosa HC FAU - Nadruz, Wilson AU - Nadruz W FAU - Bertolo, Manoel B AU - Bertolo MB FAU - Boschero, Antonio C AU - Boschero AC FAU - Saad, Mario J A AU - Saad MJ FAU - Franchini, Kleber G AU - Franchini KG FAU - Velloso, Licio A AU - Velloso LA LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060421 PL - England TA - J Neurochem JT - Journal of neurochemistry JID - 2985190R RN - 0 (Cytokines) RN - 0 (Insulin) RN - 0 (Neurotransmitter Agents) RN - 0 (RNA, Messenger) RN - 0 (Tumor Necrosis Factor-alpha) SB - IM MH - Animals MH - Behavior, Animal MH - Blotting, Western/methods MH - Cytokines/genetics/*metabolism MH - Drug Interactions/physiology MH - Eating/drug effects MH - Gene Expression Regulation/*drug effects MH - Genes, Reporter/physiology MH - Hypothalamus/*drug effects/metabolism MH - Injections, Intraventricular/methods MH - Insulin/pharmacology MH - Male MH - Neurotransmitter Agents/genetics/*metabolism MH - RNA, Messenger/biosynthesis MH - Rats MH - Rats, Wistar MH - Reverse Transcriptase Polymerase Chain Reaction/methods MH - Signal Transduction/*drug effects MH - Transfection/methods MH - Tumor Necrosis Factor-alpha/*administration & dosage EDAT- 2006/04/28 09:00 MHDA- 2006/08/17 09:00 CRDT- 2006/04/28 09:00 PHST- 2006/04/28 09:00 [pubmed] PHST- 2006/08/17 09:00 [medline] PHST- 2006/04/28 09:00 [entrez] AID - JNC3857 [pii] AID - 10.1111/j.1471-4159.2006.03857.x [doi] PST - ppublish SO - J Neurochem. 2006 Jul;98(1):203-12. doi: 10.1111/j.1471-4159.2006.03857.x. Epub 2006 Apr 21.