25-Hydroxyvitamin D is closely related with the function of the pancreatic islet β cells

Abstract

Objectives: This study is to investigate the relationship between 25-Hydroxyvitamin D (25-OH-D) and pancreatic islet ? cell function under different glucose tolerance statuses in China.

Methodology: Totally, 180 patients with type 2 diabetes mellitus (DM group), 178 patients with impaired fasting glucose/impaired glucose tolerance (IFG/IGT group), and 160 normal control subjects (NGT group) were included to measure their body parameters and biochemical parameters. In oral glucose tolerance test, fasting serum 25-OH-D was assessed by the enzyme-linked immunosorbent assay (ELISA). Homeostasis model assessment for insulin resistance (Homa-IR), insulin acuity index (IAI), ?-cell function index (Homa-BCF) as well as secretion index (IS) were determined.

Results: The levels of 25-OH-D, IAI and Homa-BCF in the DM group and IFG/IGT group were significantly lower than that in NGT group (P < 0.05). Homa-IR in DM group and IFG/IGT group was significantly higher than that in the NGT group (P < 0.05). Pearson correlation analysis and partial correlation analysis showed that 25-OH-D was positively correlated with fasting insulin (FINS) and Homa-BCF (P < 0.05). Multiple stepwise regression analysis showed that 25-OH-D was one of the influential factors of pancreatic islet ? cell function in patients with type 2 diabetes mellitus.

Conclusions: Our results suggest that 25-OH-D is closely related with the function of the pancreatic islet ? cells and is one of the influential factors of pancreatic islet ? cell function.

doi: http://dx.doi.org/10.12669/pjms.293.2982

How to cite this:Guo J, Xiao Z, Xue X, Liu X, Lu Y, Yin X, et al. 25-Hydroxyvitamin D is closely related with the function of the pancreatic islet ? cells. Pak J Med Sci 2013;29(3):809-813.