title: GH and IGF1: roles in energy metabolism of long-living GH mutant mice.
abstract: Of the multiple theories to explain exceptional longevity, the most robust of these has centered on the reduction of three anabolic protein hormones, growth hormone (GH), insulin-like growth factor, and insulin. GH mutant mice live 50% longer and exhibit significant differences in several aspects of energy metabolism as compared with wild-type mice. Mitochondrial metabolism is upregulated in the absence of GH, whereas in GH transgenic mice and dwarf mice treated with GH, multiple aspects of these pathways are suppressed. Core body temperature is markedly lower in dwarf mice, yet whole-body metabolism, as measured by indirect calorimetry, is surprisingly higher in Ames dwarf and Ghr-/- mice compared with normal controls. Elevated adiponectin, a key antiinflammatory cytokine, is also very likely to contribute to longevity in these mice. Thus, several important components related to energy metabolism are altered in GH mutant mice, and these differences are likely critical in aging processes and life-span extension.
authors.affiliation: Department of Pharmacology, Physiology & Therapeutics, School of Medicine & Health Sciences, University of North Dakota, 501 North Columbia Road, Grand Forks, ND 58202-9037, USA. holly.brown.borg@med.und.edu
authors.forename: Holly M
authors.initials: HM
authors.lastname: Brown-Borg
authors.forename: Andrzej
authors.initials: A
authors.lastname: Bartke
mesh_terms: D052242:Adiponectin / Q000097:blood / Q000378:metabolism / Q000502:physiology; D000273:Adipose Tissue / Q000502:physiology; D000818:Animals; D000975:Antioxidants / Q000378:metabolism / Q000502:physiology; D001831:Body Temperature / Q000502:physiology; D004734:Energy Metabolism / Q000502:physiology*; D005260:Female; D013006:Growth Hormone / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D007328:Insulin / Q000378:metabolism / Q000502:physiology; D007334:Insulin-Like Growth Factor I / Q000378:metabolism* / Q000502:physiology; D008136:Longevity / Q000502:physiology*; D008297:Male; D051379:Mice; D008822:Mice, Transgenic; D008928:Mitochondria / Q000502:physiology; D009154:Mutation; D018384:Oxidative Stress / Q000502:physiology; D010101:Oxygen Consumption / Q000502:physiology
chemical_list: D052242:Adiponectin; D000975:Antioxidants; D007328:Insulin; C519530:insulin-like growth factor-1, mouse; D007334:Insulin-Like Growth Factor I; D013006:Growth Hormone