Hepatic dysfunction is associated with vitamin D deficiency and poor glycemic control in diabetes mellitus
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.
The Vitamin D Council featured a blog post about this research on their website on August 30, 2012.
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.
Benjamin U. Nwosu, Zheni G. Stavre, Louise Maranda, Karen Cullen, and Mary M. Lee. "Hepatic dysfunction is associated with vitamin D deficiency and poor glycemic control in diabetes mellitus" Journal of Pediatric Endocrinology and Metabolism 25.1-2 (2012).
Available at: http://works.bepress.com/benjamin_nwosu/16
Vitamin D Council blog post 8-30-12 about this work: "Vitamin D levels and liver disease: Type I vs type II diabetes"