Differences in mRNA expression of adipocyte-derived factors in response to fasting, refeeding and leptin. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Biochimica et Biophysica Acta - Molecular Cell Research Année : 2004

Differences in mRNA expression of adipocyte-derived factors in response to fasting, refeeding and leptin.

Résumé

The present study examines whether and to what extent the profiles of adipose-derived factors are altered in epididymal and subcutaneous adipose tissues of long-term fasted/refed and of fasted rats treated by recombinant leptin. Fasting was characterized by three successive metabolic phases. Minor differences in the time-course and magnitude of response were detected between the two adipose sites. Leptin, adiponectin, resistin, adiponutrin, and insulin-like growth factor-1 (IGF-1) gene expressions differentially decreased according to the fasting duration. mRNA levels reached a minimum in late fasting for these secreted factors, being decreased by 60-90% for adiponectin, resistin, and IGF-1, 95-98% for leptin and by 100% for adiponutrin. Refeeding partially or totally restored their mRNA expression in epididymal adipose. Expression levels of apolipoprotein E (ApoE), angiotensinogen (AGT), adipsin and macrophage migration inhibitory factor (MIF) were either unchanged or slightly affected. In leptin-treated rats, leptin mRNA concentrations were significantly decreased in phase 2 of fasting (by 85%) from levels in control phosphate-buffered saline (PBS)-treated rats in both tissues. Leptin treatment also decreased resistin mRNA levels (by 78% in P2L and 63% in P3L relative to control groups) in subcutaneous adipose. These data suggest that adiponectin, resistin, adiponutrin, and IGF-1 could be involved in overall energy homeostasis during prolonged fasting, as leptin is. The mechanisms that underlie the expressions of these adipose-secreted factors remain to be determined.

Dates et versions

hal-00157687 , version 1 (26-06-2007)

Identifiants

Citer

F. Bertile, T. Raclot. Differences in mRNA expression of adipocyte-derived factors in response to fasting, refeeding and leptin.. Biochimica et Biophysica Acta - Molecular Cell Research, 2004, 1683 (1-3), pp.101-109. ⟨10.1016/j.bbalip.2004.05.001⟩. ⟨hal-00157687⟩
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