TY - JOUR
T1 - The D-vitamin metabolite 1,25(OH)2 D in serum is associated with disease activity and Anti-Citrullinated Protein Antibodies in active and treatment naïve, early Rheumatoid Arthritis Patients
AU - Herly, Mette
AU - Stengaard-Pedersen, Kristian
AU - Vestergaard, Peter
AU - Østergaard, Mikkel
AU - Junker, Peter
AU - Hetland, Merete L
AU - Hørslev-Petersen, Kim
AU - Ellingsen, Torkell
N1 - © 2018 The Foundation for the Scandinavian Journal of Immunology.
PY - 2018/9
Y1 - 2018/9
N2 - RATIONALE: Sufficient levels of vitamin D seem to be essential for proper immune function, and low levels might be associated to disease activity in Rheumatoid Arthritis (RA). Most studies investigate only 25OHD and not the physiologically active vitamin D metabolite, 1,25(OH)2 D.OBJECTIVE: To investigate associations between serum level of vitamin D metabolites and disease activity parameters in 160 inflammatory active and treatment naïve early RA patients. Serum level of vitamin D metabolites (25OHD2 , 25OHD3 and 1,25(OH)2 D) was measured by isotope dilution mass spectrometry and radio-immunoassays at baseline. Disease characteristics were gender, number of tender joints, number of swollen joints, DAS28-CRP, HAQ, VAS-scores, CRP, erosive status (Total Sharp Score; TSS), ACPA and IgM-RF-status. Associations were evaluated using Spearman's and Wilcoxon rank-sum tests. The study was registered in clinical trials; trial registration number: NCT00209859.FINDINGS: Statistically significant inverse associations were found between the active metabolite 1,25(OH)2 D and DAS28-CRP (P = 0.004, rho = -0.23), HAQ (P = 0.005, rho = -0.22), CRP (P = 0.001, rho = -0.25), VASpatient-pain (P = 0.008, rho = -0.21), and a positive association was found to ACPA-status (P = 0.04).CONCLUSION: The vitamin D metabolite 1,25(OH)2 D was inversely associated with disease activity and positively associated with ACPA in treatment naïve and inflammatory active early RA. The results indicate that in RA, both the degree of inflammatory activity, and the diagnostic sensitivity and specificity might affect-or might be affected by the level of vitamin 1,25(OH)2 D.
AB - RATIONALE: Sufficient levels of vitamin D seem to be essential for proper immune function, and low levels might be associated to disease activity in Rheumatoid Arthritis (RA). Most studies investigate only 25OHD and not the physiologically active vitamin D metabolite, 1,25(OH)2 D.OBJECTIVE: To investigate associations between serum level of vitamin D metabolites and disease activity parameters in 160 inflammatory active and treatment naïve early RA patients. Serum level of vitamin D metabolites (25OHD2 , 25OHD3 and 1,25(OH)2 D) was measured by isotope dilution mass spectrometry and radio-immunoassays at baseline. Disease characteristics were gender, number of tender joints, number of swollen joints, DAS28-CRP, HAQ, VAS-scores, CRP, erosive status (Total Sharp Score; TSS), ACPA and IgM-RF-status. Associations were evaluated using Spearman's and Wilcoxon rank-sum tests. The study was registered in clinical trials; trial registration number: NCT00209859.FINDINGS: Statistically significant inverse associations were found between the active metabolite 1,25(OH)2 D and DAS28-CRP (P = 0.004, rho = -0.23), HAQ (P = 0.005, rho = -0.22), CRP (P = 0.001, rho = -0.25), VASpatient-pain (P = 0.008, rho = -0.21), and a positive association was found to ACPA-status (P = 0.04).CONCLUSION: The vitamin D metabolite 1,25(OH)2 D was inversely associated with disease activity and positively associated with ACPA in treatment naïve and inflammatory active early RA. The results indicate that in RA, both the degree of inflammatory activity, and the diagnostic sensitivity and specificity might affect-or might be affected by the level of vitamin 1,25(OH)2 D.
KW - Adult
KW - Aged
KW - Anti-Citrullinated Protein Antibodies/blood
KW - Antirheumatic Agents/therapeutic use
KW - Arthritis, Rheumatoid/diagnosis
KW - Biomarkers/blood
KW - Calcitriol/blood
KW - Disease Progression
KW - Ergocalciferols/blood
KW - Female
KW - Humans
KW - Immunity, Humoral
KW - Male
KW - Middle Aged
KW - Severity of Illness Index
KW - Vitamin D/analogs & derivatives
KW - Young Adult
U2 - 10.1111/sji.12704
DO - 10.1111/sji.12704
M3 - Journal article
C2 - 30048002
SN - 0300-9475
VL - 88
JO - Scandinavian Journal of Immunology
JF - Scandinavian Journal of Immunology
IS - 3
M1 - e12704
ER -