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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Arthritis+Res+Ther
2018 ; 20
(1
): 158
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Serum levels of B-cell activating factor of the TNF family (BAFF) correlate with
anti-Jo-1 autoantibodies levels and disease activity in patients with
anti-Jo-1positive polymyositis and dermatomyositis
#MMPMID30053824
Kry?t?fková O
; Hulejová H
; Mann HF
; Pecha O
; P?tová I
; Ekholm L
; Lundberg IE
; Vencovský J
Arthritis Res Ther
2018[Jul]; 20
(1
): 158
PMID30053824
show ga
BACKGROUND: B-cell activating factor of the tumour necrosis factor family (BAFF)
plays a role in autoantibody production and is elevated in dermatomyositis (DM)
and anti-Jo-1-positive polymyositis (PM). We investigated the inter-relationships
between serum levels of BAFF, anti-Jo-1 autoantibodies, and disease activity.
METHODS: Serum levels of BAFF and anti-Jo-1 antibodies measured by enzyme-linked
immunosorbent assay (ELISA) were compared to levels of myoglobin, creatine kinase
(CK), aminotransferases (alanine (ALT) and aspartate (AST)), C-reactive protein
(CRP), and disease activity assessed by the Myositis Disease Activity Assessment
Tool in 63 anti-Jo-1 antibody-positive DM/PM patients. Serial serum samples
collected at 2 (46 cases) and 3-5 time points (23 cases) were included.
Relationships between BAFF, anti-Jo-1, disease activity, CRP, and their
longitudinal changes were evaluated using correlation analysis, multiple
regression (MR), path analysis (PA), and hierarchical linear models (HLM).
RESULTS: Cross-sectional assessment demonstrated significant correlations between
the levels of BAFF and anti-Jo-1 antibodies which were associated with levels of
CK, myoglobin, AST, and CRP, as well as multivariate associations between BAFF,
anti-Jo-1 antibodies, and CK levels. PA revealed direct effects of anti-Jo-1
antibodies on CK (??=?0.41) and both direct (??=?0.42) and indirect (through
anti-Jo-1 antibodies; ??=?0.17) effects of BAFF on CK. Changes in levels of both
BAFF and anti-Jo-1 between two time points (?) were associated with ?myoglobin
and ?aminotransferases and changes of BAFF correlated with ?CK, ?cutaneous,
?muscle, ?global, and ?skeletal disease activities. The longitudinal analysis
showed a high intra-individual variability of serum levels of BAFF over time
(97%) which could predict 79% of the variance in anti-Jo-1 levels. The anti-Jo-1
variability was explained by inter-individual differences (68%). The close
longitudinal relationship between levels of BAFF, anti-Jo-1, and disease activity
was supported by high proportions of their variance explained with serum levels
of CK and CRP or pulmonary and muscle activities. CONCLUSION: Our findings of
associations between levels of BAFF and anti-Jo-1 antibodies in serum and
myositis activity suggest a role of this cytokine in disease-specific
autoantibody production as part of disease mechanisms, and support BAFF as a
potential target for intervention in anti-Jo-1-positive myositis patients.