Microalbuminuria in diabetic children and adolescents. Relationship with puberty and growth hormone.
Urinary albumin excretion (UAE) was determined by radioimmunoassay in two 24 h urine collections from 125 diabetic children and adolescents and from 71 normal children matched for age and sex. Thirteen patients (10.4%) aged greater than 12 years had microalbuminuria, i.e. log transformed UAE levels above the upper normal range (24.5 mg/24 h). UAE values were positively correlated with age, GH secretion, but not with duration of disease, glycosylated hemoglobin, renal size or N-acetyl-beta-glucosaminidase excretion. Diabetic normoalbuminuric children aged 10 years and older had significantly higher UAE than controls and than younger diabetic patients matched for duration of disease. HLA DR3/DR4 heterozygosity frequency was significantly higher (p less than 0.01) in the microalbuminuric group than in the normoalbuminuric. All microalbuminuric subjects (n = 8) with short duration of disease (3.92 +/- 3.43 yr) developed diabetes at puberty. In conclusion, our cross-sectional study suggests: if a number of factors are combined, i.e. HLA DR3/DR4 heterozygosity, onset of disease at puberty and higher GH values, the probability of developing abnormal levels of UAE will increase.
Department of Paediatrics, University of Bologna, Italy.
S
S
Salardi
E
E
Cacciari
M G
MG
Pascucci
E
E
Giambiasi
M
M
Tacconi
R
R
Tazzari
A
A
Cicognani
F
F
Boriani
R
R
Puglioli
W
W
Mantovani
D000293:Adolescent; D000367:Age Factors; D000419:Albuminuria / Q000175:diagnosis / Q000209:etiology*; D002648:Child; D002675:Child, Preschool; D003922:Diabetes Mellitus, Type 1 / Q000150:complications*; D005260:Female; D005934:Glucagon / Q000378:metabolism; D013006:Growth Hormone / Q000378:metabolism*; D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D007668:Kidney / Q000503:physiopathology; D008297:Male; D012083:Renin / Q000097:blood
D006680:HLA Antigens; D013006:Growth Hormone; D005934:Glucagon; D012083:Renin