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No protective effect of calcitriol on beta-cell function in recent-onset type 1 diabetes: the IMDIAB XIII trial.


ABSTRACT: We investigated whether supplementation of the active form of vitamin D (calcitriol) in recent-onset type 1 diabetes can protect beta-cell function evaluated by C-peptide and improve glycemic control assessed by A1C and insulin requirement.Thirty-four subjects (aged 11-35 years, median 18 years) with recent-onset type 1 diabetes and high basal C-peptide >0.25 nmol/l were randomized in a double-blind trial to 0.25 microg/day calcitriol or placebo and followed-up for 2 years.At 6, 12, and 24 months follow-up, A1C and insulin requirement in the calcitriol group did not differ from the placebo group. C-peptide dropped significantly (P < 0.001) but similarly in both groups, with no significant differences at each time point.At the doses used, calcitriol is ineffective in protecting beta-cell function in subjects (including children) with recent-onset type 1 diabetes and high C-peptide at diagnosis.

SUBMITTER: Bizzarri C 

PROVIDER: S-EPMC2928344 | biostudies-literature | 2010 Sep

REPOSITORIES: biostudies-literature

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No protective effect of calcitriol on beta-cell function in recent-onset type 1 diabetes: the IMDIAB XIII trial.

Bizzarri Carla C   Pitocco Dario D   Napoli Nicola N   Di Stasio Enrico E   Maggi Daria D   Manfrini Silvia S   Suraci Concetta C   Cavallo Maria Gisella MG   Cappa Marco M   Ghirlanda Giovanni G   Pozzilli Paolo P  

Diabetes care 20100901 9


<h4>Objective</h4>We investigated whether supplementation of the active form of vitamin D (calcitriol) in recent-onset type 1 diabetes can protect beta-cell function evaluated by C-peptide and improve glycemic control assessed by A1C and insulin requirement.<h4>Research design and methods</h4>Thirty-four subjects (aged 11-35 years, median 18 years) with recent-onset type 1 diabetes and high basal C-peptide >0.25 nmol/l were randomized in a double-blind trial to 0.25 microg/day calcitriol or plac  ...[more]

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