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Open AccessArticle

Vitamin D Correction Down-Regulates Serum Amyloid P Component Levels in Vitamin D Deficient Arab Adults: A Single-Arm Trial

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Chair for Biomarkers of Chronic Diseases, Biochemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
2
Specialized Diabetes and Endocrine Center, King Fahad Medical City, Riyadh 11525, Saudi Arabia
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(9), 2880; https://doi.org/10.3390/nu12092880
Received: 23 August 2020 / Revised: 15 September 2020 / Accepted: 18 September 2020 / Published: 21 September 2020
Vitamin D (VD) has been observed to have anti-inflammatory properties. However, the effects of VD supplementation on the serum amyloid P component (SAP) has not been established. This study aimed to investigate the effect of VD supplementation on serum SAP levels in Arab adults. A total of 155 VD-deficient adult Saudis (56 males and 99 females) were recruited in this non-randomized, 6-month, single-arm trial. The intervention was as follows; cholecalciferol 50,000 international units (IU) every week for the first 2 months, followed by 50,000 twice a month for the next two months, and for the last two months, 1000 IU daily. Serum 25(OH)D, SAP, C-reactive protein (CRP), lipid profile, and glucose were assessed at baseline and post-intervention. At post-intervention, VD levels were significantly increased, while SAP levels significantly decreased in all study participants. Remarkably, this reduction in SAP was more significant in males than females after stratification. SAP was inversely correlated with VD overall (r = −0.17, p < 0.05), and only in males (r = −0.27, p < 0.05) after stratification according to sex after 6 months of VD supplementation. Such a relationship was not observed at baseline. VD supplementation can favorably modulate serum SAP concentrations in Arab adults, particularly in males. View Full-Text
Keywords: vitamin D; SAP; amyloidosis; Arab; vitamin D supplementation vitamin D; SAP; amyloidosis; Arab; vitamin D supplementation
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Amer, O.E.; Khattak, M.N.K.; Alnaami, A.M.; Aljohani, N.J.; Al-Daghri, N.M. Vitamin D Correction Down-Regulates Serum Amyloid P Component Levels in Vitamin D Deficient Arab Adults: A Single-Arm Trial. Nutrients 2020, 12, 2880.

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