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Abstract Title:

A randomized controlled trial on the effect of vitamin D3 on inflammation and cathelicidin gene expression in ulcerative colitis patients.

Abstract Source:

Saudi J Gastroenterol. 2016 Jul-Aug;22(4):316-23. PMID: 27488327

Abstract Author(s):

Amrollah Sharifi, Mohammad Javad Hosseinzadeh-Attar, Homayoon Vahedi, Saharnaz Nedjat

Article Affiliation:

Amrollah Sharifi

Abstract:

BACKGROUND: Inflammatory bowel disease (IBD) is an intestinal chronic inflammatory condition and includes Crohn's disease (CD) and ulcerative colitis (UC). It has been proposed that Vitamin D supplementation may have a beneficial role in IBD.

AIM: To characterize the effects of Vitamin D on cathelicidin (hCAP/LL37) gene expression, ESR, and serum hs-CRP levels.

MATERIALS AND METHODS: Ninety UC patients on remission were randomized to receive 300,000 IU intramuscular Vitamin D or 1 mL normal saline as placebo, respectively. Before and 90 days after intervention, serum levels of 25 (OH)-Vitamin D3, PTH, Calcium, ESR, and hs-CRP were measured. Cathelicidin gene expression was also quantified using qRT-PCR.

RESULTS: Baseline serum 25-OH-Vitamin D3 levels were not different between the two groups and after intervention, increased only in Vitamin D group (P<0.001). Hs-CRP levels were lower in Vitamin D group after intervention (Before: 3.43± 3.47 vs 3.86 ± 3.55 mg/L, P = 0.56; after: 2.31 ± 2.25 vs 3.90 ± 3.97 mg/L, P= 0.023). ESR decreased significantly in Vitamin D group (Before: 12.4 ± 6.1 vs 12.1 ± 5.3 mm/h, P= 0.77; after: 6.7 ± 4.5 vs 11.4 ± 5.5 mm/h, P<0.001). The mean fold change in hCAP18 gene expression in Vitamin D group was significantly higher than placebo group. (Mean± SD: 3.13 ± 2.56 vs 1.09 ± 0.56; median ± interquartile range: 2.17 ± 3.81 vs 0.87 ± 0.53, P<0.001).

CONCLUSION: Decreases in ESR and hs-CRP levels and increase in LL37 gene expression support the hypothesis that Vitamin D supplementation may have a beneficial role in UC patients.

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