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- Title
Proteomic analysis of the INS-1E secretome identify novel vitamin D-regulated proteins.
- Authors
Pepaj, Milaim; Bredahl, May K.; Gjerlaugsen, Nina; Thorsby, Per M.
- Abstract
<bold>Background: </bold>Experimental evidence indicates that vitamin D may have a beneficial role in pancreatic β-cell function.<bold>Methods: </bold>In the present study, stable isotope labelling by amino acids in cell culture (SILAC) in combination with liquid chromatography-tandem mass spectrometry was used to quantitatively assess the impact of the active vitamin D metabolite, 1,25-(OH)2 D3 , on global protein expression in INS-1E cell secretome.<bold>Results: </bold>Twenty-one proteins were found up-regulated (≥1.5 fold changes) and three down-regulated (≤0.67) after treatment of INS-1E cells with 1,25-(OH)2 D3 . Up-regulation of proteins implicated in β-cell growth and proliferation, such as IGF2, IGFBP7 and gelsolin, suggest that 1,25-(OH)2 D3 has a positive effect on β-cell growth and proliferation. Moreover, modulations of several proteins implicated in prohormone processing and insulin exocytosis (IGF2, IGFBP7, Scg5, ProSAAS, Fabp5, Ptprn2 and gelsolin) appear to support the hypothesis that 1,25-(OH)2 D3 plays positive modulatory role in insulin processing and secretion.<bold>Conclusions: </bold>Together, we reveal a number of novel vitamin D-regulated proteins that may contribute to a better understanding of the reported beneficial effects of vitamin D on pancreatic β-cells. Copyright © 2016 John Wiley & Sons, Ltd.
- Subjects
GENES; ISLANDS of Langerhans; ISLANDS of Langerhans tumors; PANCREATIC tumors; PROTEOMICS; CALCITRIOL; CANCER cell culture
- Publication
Diabetes/Metabolism Research & Reviews, 2016, Vol 32, Issue 6, p514
- ISSN
1520-7552
- Publication type
journal article
- DOI
10.1002/dmrr.2777