Abstract:
OBJECTIVE:To determine serum lipoprotein(a) in a large sample of IDDM and control children and to examine a possible association with puberty. RESEARCH DESIGN AND METHODS:Serum lipoprotein(a), apoB-100, and apoA-I were measured under identical conditions in 170 Caucasian children with IDDM aged 12.3 +/- 3.59 yr and 233 Caucasian control children aged 13.6 +/- 1.12 yr. Patients with persistent microalbuminuria were excluded. Lipoprotein(a), apoB-100, and apoA-I were measured by nephelometry using a specific monoclonal antibody. Pubertal assessment was performed using Tanner staging and testicular volume measurement. RESULTS:Lipoprotein(a) was higher in the IDDM than control group (geometric mean 237 mg/L, 25-75th percentile 134-465 vs. 172 [99-316] mg/L, P = 0.0008). When analyzed according to pubertal stage, only pubertal and postpubertal patients had higher levels than control subjects (265 [148-560] vs. 174 [101-320] mg/L, P = 0.0001), with prepubertal patients showing no difference. Pubertal and postpubertal patients showed both higher lipoprotein(a) (P = 0.01) levels and higher albumin excretion rates (P = 0.02) than prepubertal patients, correcting for the other variable. Lipoprotein(a) was not related to HbA1c, albumin excretion rate, duration, age, sex, mean arterial pressure, or a family history of premature coronary artery disease in the IDDM group. Lipoprotein(a) was not higher in patients with overnight albumin excretion rate above the 95th percentile but below the microalbuminuric range. ApoB-100 did not differ between IDDM and control children. ApoA-I was significantly lower in the IDDM group (1.04 [0.94-1.17] vs. 1.21 [1.10-1.31] g/L; P < 0.0001). CONCLUSIONS:Pubertal and postpubertal IDDM patients have higher serum lipoprotein(a) than Caucasian control subjects. Our findings suggest a rise in lipoprotein(a) may occur during puberty in IDDM. Longitudinal studies are required to clarify the relationship between lipoprotein(a), albumin excretion rate, and puberty.
journal_name
Diabetes Carejournal_title
Diabetes careauthors
Couper JJ,Bates DJ,Cocciolone R,Magarey AM,Boulton TJ,Penfold JL,Ryall RGdoi
10.2337/diacare.16.6.869subject
Has Abstractpub_date
1993-06-01 00:00:00pages
869-73issue
6eissn
0149-5992issn
1935-5548journal_volume
16pub_type
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