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All rights reserved. http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/dc/elements/1.1/title BEL Framework Large Corpus Document http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/authoredBy http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#_6 http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://purl.org/pav/version 1.4 http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#_5 http://www.w3.org/ns/prov#value Ciliary neurotrophic factor (CNTF) is primarily known for its roles as a lesion factor released by the ruptured glial cells that prevent neuronal degeneration. However, CNTF has also been shown to cause weight loss in a variety of rodent models of obesity/type II diabetes, whereas a modified form also causes weight loss in humans. CNTF administration can correct or improve hyperinsulinemia, hyperphagia, and hyperlipidemia associated with these models of obesity. In order to investigate the effects of CNTF on fat cells, we examined the expression of CNTF receptor complex proteins (LIFR, gp130, and CNTFRalpha) during adipocyte differentiation and the effects of CNTF on STAT, Akt, and MAPK activation. We also examined the ability of CNTF to regulate the expression of adipocyte transcription factors and other adipogenic proteins. Our studies clearly demonstrate that the expression of two of the three CNTF receptor complex components, CNTFRalpha and LIFR, decreases during adipocyte differentiation. In contrast, gp130 expression is relatively unaffected by differentiation. In addition, preadipocytes are more sensitive to CNTF treatment than adipocytes, as judged by both STAT 3 and Akt activation. Despite decreased levels of CNTFRalpha expression in fully differentiated 3T3-L1 adipocytes, CNTF treatment of these cells resulted in a time-dependent activation of STAT 3. Chronic treatment of adipocytes resulted in a substantial decrease in fatty-acid synthase and a notable decline in SREBP-1 levels but had no effect on the expression of peroxisome proliferator-activated receptor gamma, acrp30, adipocyte-expressed STAT proteins, or C/EBPalpha. However, CNTF resulted in a significant increase in IRS-1 expression. CNTFRalpha receptor expression was substantially induced in the fat pads of four rodent models of obesity/type II diabetes as compared with lean littermates. Moreover, we demonstrated that CNTF can activate STAT 3 in adipose tissue and skeletal muscle in vivo. In summary, CNTF affects adipocyte gene expression, and the specific receptor for this cytokine is induced in rodent models of obesity/type II diabetes. http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#_5 http://www.w3.org/ns/prov#wasQuotedFrom http://www.ncbi.nlm.nih.gov/pubmed/12424252 http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#_6 http://www.w3.org/2000/01/rdf-schema#label Selventa http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#assertion http://www.w3.org/ns/prov#hadPrimarySource http://www.ncbi.nlm.nih.gov/pubmed/12424252 http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#assertion http://www.w3.org/ns/prov#wasDerivedFrom http://resource.belframework.org/belframework/1.0/knowledge/large_corpus.bel http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#assertion http://www.w3.org/ns/prov#wasDerivedFrom http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#_5 http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk#pubinfo http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk http://purl.org/dc/terms/created 2014-07-03T14:30:07.157+02:00 http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk http://purl.org/pav/createdBy http://orcid.org/0000-0001-6818-334X http://www.tkuhn.ch/bel2nanopub/RAiIsM-5dFS4LUEMFlH9TeUmSS5q9BA2baqDTwwhRIbUk http://purl.org/pav/createdBy http://orcid.org/0000-0002-1267-0234