OBJECTIVE: We examined various factors possibly related to metabolic syndrome, particularly focusing on nutritional assessment proteins such as retinol binding protein (RBP) and transthyretin (TTR), and remnant lipoproteins. MATERIALS AND METHODS: Fasting serum lipid was analyzed in 58 Japanese adult volunteers (33 men and 25 women, 42.5 +/- 10.1 years old). RESULTS: The lipid profiles of the subjects were classified by lipoprotein polyacrylamide gel electrophoretic patterns into Types S (n = 10), A (n = 37), and N (n = 11), according to the method described in Internal Medicine 42: 244, 2003. RBP and TTR were significantly higher in Type N than in Types S and A. In multivariate analysis, RBP was accounted for by remnant-like particle-triglyceride (RLP-TG), interleukin 6, body mass index and low-density lipoprotein (LDL)-cholesterol (adjusted R2 = 0.621). TTR was accounted for by lipoprotein(a), adiponectin and RLP-TG (adjusted R2 = 0.415). Malondialdehyde-LDL was significantly accounted for by LDL-cholesterol and RLP-cholesterol (adjusted R2 = 0.601). Lipoprotein(a) and LDL-cholesterol were independent variables for oxidized LDL antigen (adjusted R2 = 0.620). High-sensitivity C-reactive protein was accounted for by interleukin 6, immunoreactive insulin and oxidized LDL antigen (adjusted R2 = 0.361). Uric acid and body mass index were independent variables for adiponectin (adjusted R2 = 0.429). CONCLUSION: RBP and TTR may be useful as convenient and simple clinical markers of overnutrition and possibly of metabolic syndrome.
OBJECTIVE: We examined various factors possibly related to metabolic syndrome, particularly focusing on nutritional assessment proteins such as retinol binding protein (RBP) and transthyretin (TTR), and remnant lipoproteins. MATERIALS AND METHODS: Fasting serum lipid was analyzed in 58 Japanese adult volunteers (33 men and 25 women, 42.5 +/- 10.1 years old). RESULTS: The lipid profiles of the subjects were classified by lipoprotein polyacrylamide gel electrophoretic patterns into Types S (n = 10), A (n = 37), and N (n = 11), according to the method described in Internal Medicine 42: 244, 2003. RBP and TTR were significantly higher in Type N than in Types S and A. In multivariate analysis, RBP was accounted for by remnant-like particle-triglyceride (RLP-TG), interleukin 6, body mass index and low-density lipoprotein (LDL)-cholesterol (adjusted R2 = 0.621). TTR was accounted for by lipoprotein(a), adiponectin and RLP-TG (adjusted R2 = 0.415). Malondialdehyde-LDL was significantly accounted for by LDL-cholesterol and RLP-cholesterol (adjusted R2 = 0.601). Lipoprotein(a) and LDL-cholesterol were independent variables for oxidized LDL antigen (adjusted R2 = 0.620). High-sensitivity C-reactive protein was accounted for by interleukin 6, immunoreactive insulin and oxidized LDL antigen (adjusted R2 = 0.361). Uric acid and body mass index were independent variables for adiponectin (adjusted R2 = 0.429). CONCLUSION:RBP and TTR may be useful as convenient and simple clinical markers of overnutrition and possibly of metabolic syndrome.
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