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2014 ; 177
(1
): 121-33
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Collagen-induced arthritis: severity and immune response attenuation using
multivalent N-acetyl glucosamine
#MMPMID24588081
Richter J
; Capková K
; H?íbalová V
; Vannucci L
; Danyi I
; Malý M
; Fi?erová A
Clin Exp Immunol
2014[Jul]; 177
(1
): 121-33
PMID24588081
show ga
Rheumatoid arthritis is an autoimmunity leading to considerable impairment of
quality of life. N-acetyl glucosamine (GlcNAc) has been described previously as a
potent modulator of experimental arthritis in animal models and is used for
osteoarthritis treatment in humans, praised for its lack of adverse effects. In
this study we present a comprehensive immunological analysis of multivalent
GlcNAc-terminated glycoconjugate (GC) application in the treatment of
collagen-induced arthritis (CIA) and its clinical outcome. We used
immunohistochemistry and FACS to describe conditions on the inflammation site.
Systemic and clinical effects were evaluated by FACS, cytotoxicity assay, ELISA,
cytometric bead array (CBA), RT-PCR and clinical scoring. We found reduced
inflammatory infiltration, NKG2D expression on NK and suppression of T, B and
antigen-presenting cells (APC) in the synovia. On the systemic level, GCs
prevented the activation of monocyte- and B cell-derived APCs, the rise of TNF-?
and IFN-? levels, and subsequent type II collagen (CII)-specific IgG2a formation.
Moreover, we detected an increase of anti-inflammatory IL-4 mRNA in the spleen.
Similar to the synovia, the GCs caused a significant reduction of
NKG2D-expressing NK cells in the spleen without influencing their lytic function.
GCs effectively postponed the onset of arthritic symptoms, reduced their severity
and in 18% (GN8P) and 31% (GN4C) of the cases completely prevented their
appearance. Our data prove that GlcNAc glycoconjugates prevent the inflammatory
response, involving proinflammatory cytokine rise, APC activation and NKG2D
expression, leading to the attenuation of clinical symptoms. These results
support the glycobiological approach to the treatment of collagen-induced
arthritis/rheumatoid arthritis (CIA/RA) as a way of bringing new prospects for
more effective therapeutic interventions.