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Ankylosing spondylitis and low vitamin D – several studies

Higher Vitamin D associated with less risk of AS - review & meta-analysis Sept 2014

Vitamin D in ankylosing spondylitis: Review and meta-analysis.
Clin Chim Acta. 2014 Sep 5. pii: S0009-8981(14)00392-1. doi: 10.1016/j.cca.2014.08.040. [Epub ahead of print]
Cai G1, Wang L1, Fan D1, Xin L1, Liu L1, Hu Y1, Ding N1, Xu S2, Xia G1, Jin X3, Xu J2, Zou Y1, Pan F4.
   PDF is available at deepdyve.com

BACKGROUND:
The role of vitamin D in ankylosing spondylitis (AS) is largely unknown, this paper aims to examine the association between serum vitamin D levels and susceptibility and disease activity of AS.
METHODS:
We searched the relevant literatures in PubMed, Elsevier Science Direct, Chinese Biomedical Database (CBM), Chinese National Knowledge Infrastructure (CNKI) and Wanfang (Chinese) Database published before June 2014. Eight independent case-control studies with a total of 533 AS patients and 478 matching controls were selected into this meta-analysis. Standard mean differences (SMDs) with 95% confidence intervals (CIs) were used to assess the levels of serum vitamin D, parathyroid hormone (PTH), serum calcium and alkaline phosphatase (ALP) in cases and controls, respectively. Correlation coefficients (COR) have been performed to value the correlationship between vitamin D and disease activity (erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) and Bath Ankylosing Spondylitis Disease Activity Index (BASDAI)) of AS patients.
RESULTS:
Meta-analyses results suggested that vitamin D may play a protective role in AS. (For total vitamin D: SMD=-0.71, P<0.001; for 25OHD: SMD=-0.66, P=0.002; for 1,25OHD: SMD=-0.72, P=0.19). Differences in PTH and serum calcium levels were not significant in AS (SMD=-0.10, P=0.67; SMD=0.12, P=0.17 respectively), while ALP was associated with AS susceptibility (SMD=0.20, P=0.04).

Relationship between serum vitamin D levels and disease activity were statistically significant except for 25OHD versus (vs.) CRP or BASDAI (for CRP vs. 25OHD: COR=-0.22, P=0.08; for BASDAI vs. 25OHD: COR=-0.20, P=0.06, respectively).
CONCLUSION:
The higher levels of serum vitamin D were associated with a decreased risk of AS, and showed an inverse relationship with AS activity.

Copyright © 2014. Published by Elsevier B.V.

PMID: 25199851


Decreased plasma vitamin d levels in patients with undifferentiated spondyloarthritis and ankylosing spondylitis - 2013

Intern Med. 2013;52(3):339-44. Epub 2013 Feb 1.
Erten S, Kucuksahin O, Sahin A, Altunoglu A, Akyol M, Koca C.
Department of Rheumatology, Atatürk Education and Research Hospital, Turkey.

Objective The aim of the present study was to evaluate the plasma vitamin D (vit D) levels and their association with the disease activity in patients with ankylosing spondylitis (AS) and undifferentiated spondyloarthritis (uSpA) compared with healthy populations. Methods This study included 161 spondyloarthritis patients (113 uSpA patients and 48 AS patients) attending our rheumatology out-patient clinic, along with 92 controls.

Results The plasma vit D levels were 18 μg/L (8-38) in the AS group, 20 μg/L (4-92.3) in the uSpA group and 24.3 μg/L (7.2-76.8) in the control group. The plasma vit D levels of the AS patients were significantly lower than those of the patients in the control group (p=0.004). The men in the AS group had significanly lower vit D levels than those in the control group (p=0.005). On the other hand, the women in the uSpA group had significanly lower vit D levels than those in the control group (p=0.011). The vit D levels were inversely related to both erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP) in the AS patients (p=0.002, R=-0.428; p<0.001, R=-0.592, respectively). This correlation was not demonstrated in the uSpA patients. The vit D levels were not found to correlate with the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) levels in either the AS or uSpA patients.

Conclusion 25-hydroxy-vit D deficiency is frequently observed in patients with SpAs. In this study, vit D deficiency was much more prominent in the male AS patients. On the other hand, among women, the uSpA patients exhibited much more prominent vit D deficiency than the control group subjects. The acute phase response may inversely affect the vit D levels in AS patients.

PMID: 23370741

PDF is attached at the bottom of this page


Systematic review of association between vitamin D levels and susceptibility and disease activity of ankylosing spondylitis - 2014

Rheumatology (2014); doi: 10.1093/rheumatology/keu042; First published online: April 4, 2014
Sizheng Zhao1, Stephen J Duffield2, Robert J Moots1 and Nicola J Goodson1
1Department of Rheumatology, Aintree University Hospital and 2School of Medical Education, University of Liverpool, Liverpool, UK.
Correspondence to: Nicola Goodson, Department of Rheumatology, Clinical Sciences Centre, Aintree University Hospital, Longmoor Lane, Liverpool L9 7AL, UK. E-mail: ngoodson at liverpool.ac.uk
Submitted 4 October 2013 revised version accepted 29 January 2014

Objectives. Vitamin D appears to have significant effects on both innate and acquired immunity and deficiency may be associated with both susceptibility and disease severity in some autoimmune conditions. There has been little focus on the potential immunomodulatory role of vitamin D in AS. This study systematically reviews the evidence for an association between vitamin D deficiency and disease susceptibility and severity in AS.

Methods. A systematic review was conducted using Medline, EMBASE, Web of Science and conference abstracts of the European League Against Rheumatism (2002–13), British Society for Rheumatology (1993–2013) and ACR (2006–13).

Results. Fifteen original articles and five conference abstracts met the criteria for inclusion. All were cross-sectional in design. Seven of 11 studies identified lower concentrations of 25-hydroxyvitamin D (25OHD) in AS patients compared with healthy controls. A significant inverse correlation between 25OHD and disease activity was observed in 5 of 11 studies. The majority of studies that failed to demonstrate significant findings used inappropriate statistical methods.

Conclusion. Cross-sectional studies using appropriate statistical analyses have highlighted that AS is associated with lower vitamin D concentrations. Within groups of AS patients there is some evidence that low vitamin D concentrations are associated with higher disease activity. However, there are insufficient published data to support an immunomodulatory role for vitamin D in AS. Further study with a longitudinal design is required to understand whether optimizing vitamin D in AS has potential as a disease-modifying intervention.

Publisher charges $38 for the study


4 out of 7 studies found AS associated with low vitamin D - July 2014

Vitamin D levels in ankylosing spondylitis: Does deficiency correspond to disease activity?
Rev. Bras. Reumatol. vol.54 no.4 São Paulo July/Aug. 2014; http://dx.doi.org/10.1016/j.rbr.2014.03.027
BRIEF COMMUNICATION

Gabriel G. Pokhai*, Sabiha Bandagi, Adriana Abrudescu
Department of Medicine, Division of Rheumatology, Icahn School of Medicine at Mount Sinai, Queens Hospital Center, New York, NY, USA

Ankylosing spondylitis (AS) is an inflammatory disorder that presents with arthritis of the axial skeleton, including sacroiliac joints. Vitamin D is a secosteroid hormone with a long-established role in calcium and phosphate homeostasis, and in the regulation of bone formation and resorption. It is now known that vitamin D plays an immunosuppressive role in the body, and there is interest of late in the role of vitamin D in autoimmune diseases. Inflammation may be responsible for some of the loss of bone mineral density seen in AS. We reviewed the literature for studies assessing vitamin D level as a marker of AS disease activity and those examining vitamin D levels in AS in comparison to healthy controls. Four of 7 studies found a significant negative correlation between vitamin D levels ALD


Patients with ALS should take Vitamin D - Aug 2015

 Download the PDF from VitaminDWiki


Not yet appropriate to screen ALS for Vitamin D - Nov 2016

Probably not cost effective at $100/test. But this will change with Vitamin D tests cost only $3
 Download the PDF from VitaminDWiki

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A few Google Images


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Attached files

ID Name Comment Uploaded Size Downloads
7424 Screen AS for Vitamin D - Nov 2016.pdf PDF 2016 admin 02 Dec, 2016 02:20 448.86 Kb 284
5777 ALSUntangled 24.pdf admin 12 Aug, 2015 00:58 61.62 Kb 1177
4525 AS July 2014.pdf PDF 2014 admin 29 Oct, 2014 13:08 839.98 Kb 916
3771 Ankylosing Spondylitis -Feb 2013.pdf PDF 2014 admin 05 Apr, 2014 13:55 131.52 Kb 1075
3770 AS3.jpg admin 05 Apr, 2014 13:45 21.27 Kb 6340
3769 As2.jpg admin 05 Apr, 2014 13:45 29.30 Kb 5643
3768 AS 1.jpg admin 05 Apr, 2014 13:45 62.74 Kb 6149
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