Sd. Sibley et al., Increased small dense LDL and intermediate-density lipoprotein with albuminuria in type 1 diabetes, DIABET CARE, 22(7), 1999, pp. 1165-1170
OBJECTIVE - This population study examines the relationship between LDL den
sity and persistent albuminuria in subjects with type 1 diabetes at the end
of the Diabetes Control and Complications Trial (DCCT).
RESEARCH DESIGN AND METHODS - Subjects were classified as persistently nor
moalbuminuric (albumin excretion rate [AER] <30 mg/d, n = 1,056), microalbu
minuric (AER greater than or equal to 30-299 mg/day, n = 80), and macroalbu
minuric (AER = 300 mg/day, n = 24) based on the last two AER measures.
RESULTS - Triglyceride (P <0.01) and LDL cholesterol (P <0.01) levels were
higher in macroalbuminuric subjects compared with normoalbuminuric subjects
. Cholesterol distribution by density-gradient ultracentrifugation showed a
n increase in intermediate-density lipoprotein (IDL) and a shift in peak LD
L from buoyant toward more dense particles with progressive albuminuria. In
the entire group, there was a significant negative correlation between the
peak buoyancy of LDL particles and albuminuria (r = -0.238, P < 0.001, n =
1,160). This correlation persisted in the normoalbuminuric DCCT group (r =
-0.138, P < 0.001, n = 1,056).
CONCLUSIONS - As albuminuria increases in subjects with type 1 diabetes, dy
slipidemia occurs with an increase in IDL and dense LDL that may lead to in
creased cardiovascular disease.