Abstract
Elevated concentrations of proinsulin-like molecules, other than insulin, may be associated with abnormalities of cardiovascular risk factors, promoting atherogenesis and thrombosis. Using specific assays we examined the relationship of levels of insulin, intact proinsulin and des-31,32 proinsulin to blood pressure, lipids, fibrinogen, factor VII and albumin excretion rate in 270 europids with normal glucose tolerance. After correcting for age and body mass index, fasting and 2-h insulin concentrations were significantly associated with those of total and LDL-cholesterol (r = 0.18-0.22), HDL-cholesterol (both r = -0.20) and triglycerides (r = 0.21 and 0.18), but not with blood pressure. Concentrations of intact and des-31,32 proinsulin showed significant associations with those of total and LDL-cholesterol (r = 0.20-0.23), HDL-cholesterol (r = -0.31 and -0.32) and triglycerides (r = 0.22 and 0.26). Fasting insulin and intact proinsulin concentrations were significantly associated with fibrinogen (r = -0.15 and 0.18). Concentrations of proinsulin-like molecules comprised less than 10% of all insulin-like molecules, and so were calculated not to influence previously described relationships between insulin concentrations and cardi...Continue Reading
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