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2017 ; 7
(1
): 8933
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T cell specific Cxcr5 deficiency prevents rheumatoid arthritis
#MMPMID28827539
Moschovakis GL
; Bubke A
; Friedrichsen M
; Falk CS
; Feederle R
; Förster R
Sci Rep
2017[Aug]; 7
(1
): 8933
PMID28827539
show ga
The chemokine receptor CXCR5 is primarily expressed on B cells and Tfh cells and
facilitates their migration towards B cell follicles. In the present study we
investigated the role of the CXCL13/CXCR5 axis in the pathogenesis of rheumatoid
arthritis (RA) and specifically addressed the impact of CXCR5-mediated T and B
cell migration in this disease. Employing collagen-induced arthritis (CIA) we
identify CXCR5 as an absolutely essential factor for the induction of
inflammatory autoimmune arthritis. Cxcr5-deficient mice and mice selectively
lacking Cxcr5 on T cells were completely resistant to CIA, showed impaired
germinal center responses and failed to mount an IgG1 antibody response to
collagen II. Selective ablation of CXCR5 expression in B cells also led to
suppression of CIA owing to diminished GC responses in secondary lymphoid organs
(SLO) and impaired anti-collagen II antibody production. Chimeric mice harboring
Cxcr5-proficient and Cxcr5-deficient immune cells revealed SLO and not the
synovial tissue as the compartment where CXCR5-mediated cell migration induces
autoimmune inflammation in arthritis. Thus our data demonstrate that
CXCR5-mediated co-localization of Tfh cells and B cells in SLOs is absolutely
essential for the induction of RA and identify CXCR5 and Tfh cells as promising
therapeutic targets for the treatment of RA.