Journal of Pediatric Endocrinology and Metabolism
Editor-in-Chief: Kiess, Wieland
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Hepatic dysfunction is associated with vitamin D deficiency and poor glycemic control in diabetes mellitus
1Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA, USA
2Department of Medicine, University of Massachusetts Medical School, Worcester, MA, USA
Citation Information: Journal of Pediatric Endocrinology and Metabolism. Volume 25, Issue 1-2, Pages 181–186, ISSN (Online) 2191-0251, ISSN (Print) 0334-018X, DOI: 10.1515/jpem-2011-0403, January 2012
- Published Online:
Background/Aims: The effect of the rising prevalence of nonalcoholic fatty liver disease on the 25-hydroxylation of pre-vitamin D in the liver, and consequent glycemic control in children with diabetes mellitus is not known. Our aim was to determine whether mild hepatic dysfunction was associated with impaired 25-hydroxylation of pre-vitamin D, and if this vitamin D deficiency was associated with impaired glycemic control in children and adolescents with type 1 diabetes (TIDM) and type 2 diabetes (T2DM).
Methods: We analyzed simultaneously measured HbA1c, ALT, AST, and 25OHD levels and clinical parameters in 121 children and adolescents with T1DM (n=81) and T2DM (n=40). The subjects, ages 11–21 years, all had diabetes of >6 months duration. Multivariate linear regression was used to analyze the associations, while comparisons between subgroups were made using two-tailed Student’s t-test.
Results: Vitamin D deficiency (25OHD <15 ng/mL (37.5 nmol/L) was more prevalent in T2DM patients (47.5%) compared to T1DM patients (18.5%). Subjects with T2DM had significantly elevated transaminases (AST 39.3±2.0 vs. 22.4±1.4, p<0.001; ALT 30.6±1.8 vs. 18.7±1.3, p<0.001) compared to T1DM patients, and demonstrated a significant inverse relationship between their HbA1c and 25OHD levels (β=–0.42, p=0.02), compared to T1DM subjects (β=–0.06, p=0.62).
Conclusions: The association of elevated ALT with vitamin D deficiency suggests that hepatic dysfunction could impair vitamin D metabolism and negatively impact glycemic control in youth with T2DM.
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