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. 2011 Feb;28(2):148-55.
doi: 10.1111/j.1464-5491.2010.03143.x.

Association of insulin sensitivity to lipids across the lifespan in people with Type 1 diabetes

D M Maahs  1 , K Nadeau, J K Snell-Bergeon, I Schauer, B Bergman, N A West, M Rewers, S R Daniels, L G Ogden, R F Hamman, D Dabelea
Affiliations

Association of insulin sensitivity to lipids across the lifespan in people with Type 1 diabetes

D M Maahs et al. Diabet Med. 2011 Feb.

Abstract

Aims: Insulin resistance and dyslipidaemia both increase cardiovascular risk in Type 1 diabetes. However, little data exist on the associations of insulin resistance to lipids in Type 1 diabetes. Our objective was to explore the associations between insulin resistance (assessed by glucose infusion rate) and lipids in people with Type 1 diabetes and determine whether adiposity and/or average glycaemia influence these associations.

Methods: Hyperinsulinaemic-euglycaemic clamp studies were performed in 60 subjects with Type 1 diabetes aged 12-19 years (age 15±2 years, 57% female, duration of diabetes 6.3±3.8 years, HbA(1c) 8.6±1.5%, IFCC=70 mmol/mol) and 40 subjects with Type 1 diabetes aged 27-61 years (age 45±9 years, 53% female, duration of diabetes 23±8 years, HbA(1c) 7.5±0.9%, IFCC=58 mmol/mol). Multiple linear regression models were fit to examine the association between glucose infusion rate and fasting lipid levels with adjustment for possible confounders.

Results: Lower glucose infusion rate was significantly associated with lower levels of HDL cholesterol in youths with Type 1 diabetes and with higher levels of triglycerides and higher triglyceride/HDL ratio in both youths and adults. The magnitude of the associations between glucose infusion rate and lipid levels translate into interquartile differences of 0.098 mmol/l for HDL cholesterol, 0.17 mmol/l for triglycerides and 1.06 for triglycerides/HDL in the adolescents and 0.20 mmol/l for triglycerides and 1.01 for triglycerides/HDL in the adults. The associations were attenuated and no longer statistically significant by adjustment for adiposity among adults, while adjustment for HbA(1c) had a small effect in youths and adults.

Conclusions: Lower insulin sensitivity is associated with a more atherogenic lipid profile in both youths and adults with Type 1 diabetes.

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Figures

Figure 1
Figure 1
Unadjusted association of glucose infusion rate (mg/kg fat-free mass/min) to (a) HDL, SEARCH for Diabetes in Youths (SEARCH), (b) triglycerides, SEARCH, (c) HDL, Coronary Artery Calcification in Type 1 Diabetes (CACTI) and (d) triglycerides, CACTI.
Figure 1
Figure 1
Unadjusted association of glucose infusion rate (mg/kg fat-free mass/min) to (a) HDL, SEARCH for Diabetes in Youths (SEARCH), (b) triglycerides, SEARCH, (c) HDL, Coronary Artery Calcification in Type 1 Diabetes (CACTI) and (d) triglycerides, CACTI.
See this image and copyright information in PMC

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