Details

Autor(en) / Beteiligte

• Aicher, Brittany O.
• Haser, Erin K.
• Freeman, Lita A.
• Carnie, Andrea V.
• Stonik, John A.
• Wang, Xunde
• Remaley, Alan T.
• Kato, Gregory J.
• Cannon, Richard O.

Titel

Diet‐Induced Weight Loss in Overweight or Obese Women and Changes in High‐Density Lipoprotein Levels and Function

Ist Teil von

• Obesity (Silver Spring, Md.), 2012-10, Vol.20 (10), p.2057-2062

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2012

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Diet‐induced weight loss in women may be associated with decreases not only in plasma levels of low‐density lipoprotein cholesterol (LDL‐C), but also in high‐density lipoprotein cholesterol (HDL‐C). Whether a decrease in HDL‐C is associated with altered HDL function is unknown. One hundred overweight or obese women (age 46 ± 11 years, 60 black; 12 diabetic) were enrolled in the 6‐month program of reduced fat and total energy diet and low‐intensity exercise. Serum cholesterol efflux capacity was measured in 3H‐cholesterol‐labeled BHK cells expressing ABCA1, ABCG1, or SR‐B1 transporters and incubated with 1% apolipoprotein B (apoB)‐depleted serum. Antioxidant properties of HDL were estimated by paraoxonase‐1 (PON1) activity and oxygen radical absorbance capacity (ORAC). Endothelial nitric oxide synthase (eNOS) activation was measured by conversion of l‐arginine to l‐citrulline in endothelial cells incubated with HDL from 49 subjects. Participants achieved an average weight loss of 2.2 ± 3.9 kg (P < 0.001), associated with reductions in both LDL‐C (−6 ± 21 mg/dl, P = 0.004) and HDL‐C (−3 ± 9 mg/dl, P = 0.016). Cholesterol efflux capacity by the ABCA1 transporter decreased by 10% (P = 0.006); efflux capacities by the ABCG1 and SR‐B1 transporters were not significantly altered. ORAC decreased by 15% (P = 0.018); neither PON1 activity nor eNOS activation was significantly altered by reduction in HDL‐C. Findings were similar for diabetic and nondiabetic subjects. Diet‐induced weight loss in overweight or obese women is associated with a decrease in HDL‐C levels, but overall HDL function is relatively spared, suggesting that decrease in HDL‐C in this setting is not deleterious to cardiovascular risk.