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2016 ; 6
(ä): 26489
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NLRP3 Deficiency Reduces Macrophage Interleukin-10 Production and Enhances the
Susceptibility to Doxorubicin-induced Cardiotoxicity
#MMPMID27225830
Kobayashi M
; Usui F
; Karasawa T
; Kawashima A
; Kimura H
; Mizushina Y
; Shirasuna K
; Mizukami H
; Kasahara T
; Hasebe N
; Takahashi M
Sci Rep
2016[May]; 6
(ä): 26489
PMID27225830
show ga
NLRP3 inflammasomes recognize non-microbial danger signals and induce release of
proinflammatory cytokine interleukin (IL)-1?, leading to sterile inflammation in
cardiovascular disease. Because sterile inflammation is involved in doxorubicin
(Dox)-induced cardiotoxicity, we investigated the role of NLRP3 inflammasomes in
Dox-induced cardiotoxicity. Cardiac dysfunction and injury were induced by
low-dose Dox (15 mg/kg) administration in NLRP3-deficient (NLRP3(-/-)) mice but
not in wild-type (WT) and IL-1?(-/-) mice, indicating that NLRP3 deficiency
enhanced the susceptibility to Dox-induced cardiotoxicity independent of IL-1?.
Although the hearts of WT and NLRP3(-/-) mice showed no significant difference in
inflammatory cell infiltration, macrophages were the predominant inflammatory
cells in the hearts, and cardiac IL-10 production was decreased in Dox-treated
NLRP3(-/-) mice. Bone marrow transplantation experiments showed that bone
marrow-derived cells contributed to the exacerbation of Dox-induced
cardiotoxicity in NLRP3(-/-) mice. In vitro experiments revealed that NLRP3
deficiency decreased IL-10 production in macrophages. Furthermore,
adeno-associated virus-mediated IL-10 overexpression restored the exacerbation of
cardiotoxicity in the NLRP3(-/-) mice. These results demonstrated that NLRP3
regulates macrophage IL-10 production and contributes to the pathophysiology of
Dox-induced cardiotoxicity, which is independent of IL-1?. Our findings identify
a novel role of NLRP3 and provided new insights into the mechanisms underlying
Dox-induced cardiotoxicity.