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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 Autoimmunity
2018 ; 51
(2
): 53-61
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Alterations in nucleotide-binding oligomerization domain-2 expression, pathway
activation, and cytokine production in Yao syndrome
#MMPMID29471675
McDonald C
; Shen M
; Johnson EE
; Kabi A
; Yao Q
Autoimmunity
2018[Mar]; 51
(2
): 53-61
PMID29471675
show ga
Yao syndrome (YAOS) is a systemic autoinflammatory disease (SAID), formerly
termed nucleotide-binding oligomerization domain-2 (NOD2)-associated
autoinflammatory disease. Due to the recent identification of YAOS, the molecular
mechanisms underlying its disease pathogenesis are unclear. With specific NOD2
variants as characteristic genotypic features of YAOS, our study examined NOD2
expression, transcript splicing, signaling pathway activation, and cytokine
profiles in peripheral blood mononuclear cells (PBMCs) from 10 YAOS patients and
six healthy individuals. All participants were genotyped for NOD2 variants; all
YAOS patients were heterozygous for the NOD2 IVS8(+158) variant (IVS8(+158)) and
four patients also carried a concurrent NOD2 R702W variant (IVS8(+158)/R702W
haplotype). Resembling other SAIDs, plasma levels of TNF?, IL-1?, IL-6, IFN?, and
S100A12 were unaltered in YAOS patients. Intron-8 splicing of NOD2 transcripts
was unaffected by carriage of NOD2 IVS8(+158). However, NOD2 transcript level and
basal p38 mitogen-activated protein kinase (MAPK) activity were significantly
elevated in PBMCs from IVS8(+158) YAOS patients. Moreover, these patients' cells
had elevated basal IL-6 secretion that was enhanced by muramyl dipeptide (MDP)
stimulation. Tocilizumab treatment of a YAOS IVS8(+158) patient resulted in
marked clinical improvement. In contrast, MDP-stimulated NF-?B activity was
uniquely suppressed in haplotype IVS8(+158)/R702W patients, as was TNF?
secretion. Our study demonstrates for the first time that NOD2 expression and
pathway activation are aberrant in YAOS, and specific NOD2 genotypes result in
distinct NOD2 expression and cytokine profiles. These findings may also help
select therapeutic strategies in the future.
|Adult
[MESH]
|Aged
[MESH]
|Antibodies, Monoclonal, Humanized/therapeutic use
[MESH]
|Cytokines/*blood
[MESH]
|Female
[MESH]
|Genetic Predisposition to Disease/*genetics
[MESH]