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2014 ; 66
(10
): 2881-91
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Contribution of mast cell-derived interleukin-1? to uric acid crystal-induced
acute arthritis in mice
#MMPMID24943488
Reber LL
; Marichal T
; Sokolove J
; Starkl P
; Gaudenzio N
; Iwakura Y
; Karasuyama H
; Schwartz LB
; Robinson WH
; Tsai M
; Galli SJ
Arthritis Rheumatol
2014[Oct]; 66
(10
): 2881-91
PMID24943488
show ga
OBJECTIVE: Gouty arthritis is caused by the precipitation of monosodium urate
monohydrate (MSU) crystals in the joints. While it has been reported that mast
cells (MCs) infiltrate gouty tophi, little is known about the actual roles of MCs
during acute attacks of gout. This study was undertaken to assess the role of MCs
in a mouse model of MSU crystal-induced acute arthritis. METHODS: We assessed the
effects of intraarticular (IA) injection of MSU crystals in various strains of
mice with constitutive or inducible MC deficiency or in mice lacking
interleukin-1? (IL-1?) or other elements of innate immunity. We also assessed the
response to IA injection of MSU crystals in genetically MC-deficient mice after
IA engraftment of wild-type or IL-1?(-/-) bone marrow-derived cultured MCs.
RESULTS: MCs were found to augment acute tissue swelling following IA injection
of MSU crystals in mice. IL-1? production by MCs contributed importantly to MSU
crystal-induced tissue swelling, particularly during its early stages. Selective
depletion of synovial MCs was able to diminish MSU crystal-induced acute
inflammation in the joints. CONCLUSION: Our findings identify a previously
unrecognized role of MCs and MC-derived IL-1? in the early stages of MSU
crystal-induced acute arthritis in mice.