CONTEXT: Serum retinol-binding protein 4 (RBP-4), leptin, and adiponectin concentrations identify insulin resistance in varied conditions, but their relationships with insulin sensitivity and ectopic fat accumulation are unclear. OBJECTIVE: Our objective was to establish how these adipokines are related with intramyocellular lipid (IMCL) and intrahepatic lipid (IHL) content. DESIGN AND SETTING: We assessed retrospectively serum fasting RBP-4 concentrations in 1) 53 nondiabetic individuals in which insulin sensitivity and IMCL content were assessed by means of the insulin clamp and of 1H magnetic resonance spectroscopy of the calf muscles, and 2) 140 nondiabetic individuals in which insulin sensitivity and the IHL content were assessed by means of the updated homeostasis model assessment and of 1H magnetic resonance spectroscopy. In both experiments, serum leptin and adiponectin concentrations were measured. RESULTS: Fasting serum RBP-4, adiponectin, and leptin were associated with peripheral insulin sensitivity, were abnormal in the first-degree relatives of type 2 diabetic parents, and correlated with the soleus IMCL content and with the IHL content. The association of RBP-4 and adiponectin with insulin sensitivity was age, sex, and body mass index independent, but stepwise regression analysis suggested that RBP-4, but not adiponectin and leptin, was independently associated with insulin sensitivity. Adiponectin was independently associated with the IHL content, RBP-4, and leptin with the soleus IMCL content. CONCLUSION: Serum RBP-4 was a robust marker of insulin resistance. Serum RBP-4, leptin, and adiponectin concentrations reflected ectopic fat accumulation in humans.
CONTEXT: Serum retinol-binding protein 4 (RBP-4), leptin, and adiponectin concentrations identify insulin resistance in varied conditions, but their relationships with insulin sensitivity and ectopic fat accumulation are unclear. OBJECTIVE: Our objective was to establish how these adipokines are related with intramyocellular lipid (IMCL) and intrahepaticlipid (IHL) content. DESIGN AND SETTING: We assessed retrospectively serum fasting RBP-4 concentrations in 1) 53 nondiabetic individuals in which insulin sensitivity and IMCL content were assessed by means of the insulin clamp and of 1H magnetic resonance spectroscopy of the calf muscles, and 2) 140 nondiabetic individuals in which insulin sensitivity and the IHL content were assessed by means of the updated homeostasis model assessment and of 1H magnetic resonance spectroscopy. In both experiments, serum leptin and adiponectin concentrations were measured. RESULTS: Fasting serum RBP-4, adiponectin, and leptin were associated with peripheral insulin sensitivity, were abnormal in the first-degree relatives of type 2 diabetic parents, and correlated with the soleus IMCL content and with the IHL content. The association of RBP-4 and adiponectin with insulin sensitivity was age, sex, and body mass index independent, but stepwise regression analysis suggested that RBP-4, but not adiponectin and leptin, was independently associated with insulin sensitivity. Adiponectin was independently associated with the IHL content, RBP-4, and leptin with the soleus IMCL content. CONCLUSION: Serum RBP-4 was a robust marker of insulin resistance. Serum RBP-4, leptin, and adiponectin concentrations reflected ectopic fat accumulation in humans.
Authors: Edi Vaisbuch; Roberto Romero; Shali Mazaki-Tovi; Juan Pedro Kusanovic; Tinnakorn Chaiworapongsa; Zhong Dong; Sun Kwon Kim; Giovanna Ogge; Maria Teresa Gervasi; Sonia S Hassan Journal: J Perinat Med Date: 2010-07 Impact factor: 1.901
Authors: Qi Sun; Urban A Kiernan; Ling Shi; David A Phillips; Barbara B Kahn; Frank B Hu; Joann E Manson; Christine M Albert; Kathryn M Rexrode Journal: Circulation Date: 2013-04-12 Impact factor: 29.690
Authors: A F Godoy-Matos; L R Bahia; R C Domingues; F Sicuro; M Tambascia; B Geloneze; L G Kraemer-Aguiar; E Bouskela Journal: J Endocrinol Invest Date: 2009-07-28 Impact factor: 4.256
Authors: Hayley A Scott; Peter G Gibson; Manohar L Garg; Jeffrey J Pretto; Philip J Morgan; Robin Callister; Lisa G Wood Journal: Respir Res Date: 2012-02-01
Authors: Lu Qi; Kihwa Kang; Cuilin Zhang; Rob M van Dam; Peter Kraft; David Hunter; Chih-Hao Lee; Frank B Hu Journal: Diabetes Date: 2008-07-22 Impact factor: 9.461