Vitamin D Levels in Takayasu's Arteritis and a Review of the Literature on Vasculitides. Issue 5 (10th December 2015)

• Record Type: Journal Article
• Authors: Alibaz‐Oner, Fatma; Asmaz‐Haliloglu, Özlem; Gogas‐Yavuz, Dilek; Can, Meryem; Haklar, Goncagul; Direskeneli, Haner
• Is Part Of: Journal of clinical laboratory analysis. Volume 30:Issue 5(2016:Sep.)
• Page Start: 529
• Page End: 533
• Publication Date: 2015-12-10
• Subjects: Takayasu's arteritis -- vitamin D deficiency -- vasculitis; Diagnosis, Laboratory -- Periodicals; Medical laboratory technology -- Periodicals; 616
• DOI: 10.1002/jcla.21898
• Languages: English
• ISSNs: 0887-8013

Abstract

Abstract : Objective: Takayasu's arteritis (TAK) is a chronic, large‐vessel vasculitis. Vitamin D, as a steroidal hormone, has recently been shown to have immunoregulatory and immunosuppressive effects. Low vitamin D levels are demonstrated in various autoimmune disorders. The aim of this study is to investigate vitamin D levels in patients with TAK. A comprehensive review of vitamin D levels in systemic vasculitides (SVs) is also performed. Methods: The study included 36 patients with TAK, 28 patients with Behçet's disease (BD) as disease control and 30 sex‐matched healthy controls. Plasma 25‐hydroxy vitamin D (25(OH) vit D) levels were measured with high‐performance liquid chromatography. "Deficiency" was defined as 25(OH) vit D levels below 25 nmol/l and "insufficiency" as below 50 nmol/l. Results: Plasma 25(OH) vit D levels were significantly lower in TAK patients (16.93 ± 10.62 nmol/l) than healthy controls (64.63 ± 21.82 nmol/l). Vitamin D level in BD patients (38.8 ± 20.9 nmol/l) is lower than healthy controls but higher than TAK patients. The frequency of vitamin D deficiency was 83.3% in patients with TAK compared to 3.3% in healthy controls. Plasma 25(OH) vit D levels were same between clinically active and inactive patients. In literature review, very few studies were found to investigate vitamin D in SVs. Conclusion: We observed a high prevalence of vitamin D deficiency in patients with TAK. As various immune effects of vitamin D on mononuclear cells and arterial endothelium is shown, vitamin D deficiency can be a predisposing factor for immune activation in SV. We therefore suggest monitorization and replacement of vitamin D status in all TAK and other SV patients.