NLRP3 inflammasome is involved in testicular inflammation induced by lipopolysaccharide in mice
NLRP3 inflammasome is involved in testicular inflammation induced by lipopolysaccharide in mice
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DOI：
10.1111/aji.13527
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发表时间：
2022-02-16
影响因子：
3.6
通讯作者：
Shirasuna, Koumei
中科院分区：
文献类型：
--
作者：
Sano, Michiya;Komiyama, Hiromu;Shirasuna, Koumei
Problem: Systemic inflammation induced by infection, which is associated with testicular inflammation, predisposes males to subfertility. Recently, the nucleotide-binding oligomerization domain, leucine-rich repeat-, and pyrin domain-containing 3 (NLRP3) inflammasome was identified as a key mediator of inflammation, and excessive activation of the NLRP3 inflammasome was shown to contribute to the pathogenesis of a wide variety of diseases. However, the mechanisms underlying infectious inflammation in the testis remain unclear. We investigated the effect of lipopolysaccharide (LPS)-induced systemic inflammation on the role of the NLRP3 inflammasome in murine testes.Method of study: We performed in vivo and in vitro studies using an LPS-induced model of NLRP3 inflammasome activation and testicular inflammation.Results: Intraperitoneal administration of LPS significantly impaired sperm motility in the epididymis of wild type (WT) and NLRP3-knockout (KO) mice. LPS administration stimulated interleukin (IL)-1 beta production and secretion in the testes of WT mice, and these adverse effects were improved in the testes of NLRP3-KO mice. LPS administration also stimulated neutrophil infiltration as well as its chemoattractant C-C motif chemokine ligand 2 (CCL2) in WT testes, which were suppressed in NLRP3-KO testes. In in vitro cell culture, treatment with LPS and NLRP3 inflammasome activation significantly induced IL-1 beta and CCL2 secretion from WT but not NLRP3-KO testicular cells.Conclusions: Taken together, our results suggest that testicular cells have the potential to secrete IL-1 beta and CCL2 in an NLRP3 inflammasome-dependent manner and that these cytokines from the testis may further exacerbate testicular function, resulting in subfertility during infectious diseases.
