Insulin resistance, hepatic lipid and adipose tissue distribution in HIV-infected men

被引:0
|
作者
He, Qing [1 ]
Engelson, Ellen S. [1 ]
Ionescu, Gabriel [1 ]
Glesby, Marshall J. [2 ]
Albu, Jeanine B. [3 ]
Kotler, Donald P. [1 ]
机构
[1] Columbia Univ, St Lukes Roosevelt Hosp Ctr, Dept Med, Div Gastroenterol, New York, NY 10027 USA
[2] New York Presbyterian Hosp, Weill Cornell Med Coll, Dept Med, Div Int Med & Infect Dis, New York, NY USA
[3] Columbia Univ, St Lukes Roosevelt Hosp Ctr, Dept Med, Div Endocrinol & Metab, New York, NY USA
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R51 [传染病];
学科分类号
100401 ;
摘要
Background: A large proportion of HIV-infected patients on antiretroviral medication develop insulin resistance, especially in the context of fat redistribution. This study investigates the interrelationships among fat distribution, hepatic lipid content, and insulin resistance in HIV-infected men. Methods: We performed a cross-sectional analysis of baseline data from 23 HIV-infected participants in three prospective clinical studies. Magnetic resonance spectroscopy was used to quantify hepatic lipid concentrations. Magnetic resonance imaging was used to quantify whole-body adipose tissue compartments: that is, subcutaneous adipose tissue (SAT) and visceral adipose tissue (VAT) volumes, as well as the intermuscular adipose tissue (IMAT) subcompartment and the omental-mesenteric adipose tissue (OMAT) and retroperitoneal adipose tissue (RPAT) subcompartments of VAT. The homeostasis model for assessment of insulin resistance (HOMA-IR) was calculated from fasting glucose and insulin concentrations. Results: Hepatic lipid content correlated significantly with total VAT (r=0.62, P=0.0014), but not with SAT (r=0.053, P=0.81). In univariate analysis, hepatic lipid content was associated with the OMAT (r=0.67, P=0.0004) and RPAT (r=0.53, P=0.009) subcompartments; HOMA-IR correlated with both VAT and hepatic lipid contents (r=0.61, P=0.057 and r=0.68, P=0.0012, respectively). In stepwise linear regression models, hepatic lipid had the strongest associations with OMAT and with HOMA-IR. Conclusion: Hepatic lipid content is associated with VAT volume, especially the OMAT subcompartment, in HIV-infected men. Hepatic lipid content is associated with insulin resistance in HIV-infected men. Hepatic lipid content might mediate the relationship between VAT and insulin resistance among treated, HIV-infected men.
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页码:423 / 428
页数:6
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