Publikationsdatum:
2003-01-25
Beschreibung:
Caloric restriction has been shown to increase longevity in organisms ranging from yeast to mammals. In some organisms, this has been associated with a decreased fat mass and alterations in insulin/insulin-like growth factor 1 (IGF-1) pathways. To further explore these associations with enhanced longevity, we studied mice with a fat-specific insulin receptor knockout (FIRKO). These animals have reduced fat mass and are protected against age-related obesity and its subsequent metabolic abnormalities, although their food intake is normal. Both male and female FIRKO mice were found to have an increase in mean life-span of approximately 134 days (18%), with parallel increases in median and maximum life-spans. Thus, a reduction of fat mass without caloric restriction can be associated with increased longevity in mice, possibly through effects on insulin signaling.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bluher, Matthias -- Kahn, Barbara B -- Kahn, C Ronald -- DK 30136/DK/NIDDK NIH HHS/ -- DK 43051/DK/NIDDK NIH HHS/ -- DK 56116/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2003 Jan 24;299(5606):572-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Joslin Diabetes Center and Department of Medicine, Harvard Medical School, One Joslin Place, Boston, MA, 02215 USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12543978" target="_blank"〉PubMed〈/a〉
Schlagwort(e):
Adipose Tissue/*anatomy & histology/*metabolism
;
Aging
;
Animals
;
Body Constitution
;
Body Weight
;
Caloric Restriction
;
Eating
;
Female
;
Insulin/metabolism
;
Insulin-Like Growth Factor I/metabolism
;
*Longevity
;
Male
;
Mice
;
Mice, Knockout
;
Receptor, Insulin/*genetics/metabolism
;
Signal Transduction
;
*Thinness
Print ISSN:
0036-8075
Digitale ISSN:
1095-9203
Thema:
Biologie
,
Chemie und Pharmazie
,
Informatik
,
Medizin
,
Allgemeine Naturwissenschaft
,
Physik
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