Absence of an Effect of Liposuction on Insulin Action and Risk Factors for Coronary Heart Disease
Samuel Klein, M.D., Luigi Fontana, M.D., Ph.D., V. Leroy Young, M.D., Andrew R. Coggan, Ph.D., Charles Kilo, M.D., Bruce W. Patterson, Ph.D., and B. Selma Mohammed, M.D., Ph.D.
Background Liposuction has been proposed as a potential treatmentfor the metabolic complications of obesity. We evaluated theeffect of large-volume abdominal liposuction on metabolic riskfactors for coronary heart disease in women with abdominal obesity.
Methods We evaluated the insulin sensitivity of liver, skeletalmuscle, and adipose tissue (with a euglycemichyperinsulinemicclamp procedure and isotope-tracer infusions) as well as levelsof inflammatory mediators and other risk factors for coronaryheart disease in 15 obese women before and 10 to 12 weeks afterabdominal liposuction. Eight of the women had normal glucosetolerance (mean [±SD] body-mass index, 35.1±2.4),and seven had type 2 diabetes (body-mass index, 39.9±5.6).
Results Liposuction decreased the volume of subcutaneous abdominaladipose tissue by 44 percent in the subjects with normal glucosetolerance and 28 percent in those with diabetes; those withnormal oral glucose tolerance lost 9.1±3.7 kg of fat(18±3 percent decrease in total fat, P=0.002), and thosewith type 2 diabetes lost 10.5±3.3 kg of fat (19±2percent decrease in total fat, P<0.001). Liposuction didnot significantly alter the insulin sensitivity of muscle, liver,or adipose tissue (assessed by the stimulation of glucose disposal,the suppression of glucose production, and the suppression oflipolysis, respectively); did not significantly alter plasmaconcentrations of C-reactive protein, interleukin-6, tumor necrosisfactor , and adiponectin; and did not significantly affect otherrisk factors for coronary heart disease (blood pressure andplasma glucose, insulin, and lipid concentrations) in eithergroup.
Conclusions Abdominal liposuction does not significantly improveobesity-associated metabolic abnormalities. Decreasing adiposetissue mass alone will not achieve the metabolic benefits ofweight loss.
Source Information
From the Center for Human Nutrition, Washington University School of Medicine, St. Louis (S.K., L.F., V.L.Y., A.R.C., C.K., B.W.P., B.S.M.); and the Division of Food Science, Human Nutrition and Health, Istituto Superiore di Sanità Rome, Rome (L.F.).
Address reprint requests to Dr. Klein at Washington University School of Medicine, 660 South Euclid Ave., Campus Box 8031, St. Louis, MO 63110.
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