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Hemin Induces the Activation of NLRP3 Inflammasome in N9 Microglial Cells | ||
Iranian Journal of Immunology | ||
مقاله 4، دوره 15، شماره 2، شهریور 2018، صفحه 122-132 اصل مقاله (536.31 K) | ||
نوع مقاله: Original Article | ||
شناسه دیجیتال (DOI): 10.22034/iji.2018.39376 | ||
نویسندگان | ||
Yan Tan1، 2؛ Si-Wei Tan1؛ Bo-Ya Fan3؛ Lei Li* 2؛ Yuan-Guo Zhou* 1 | ||
1Molecular Biology Center, State Key Laboratory of Trauma, Burn, and Combined Injury, Institute of Surgery Research and Daping Hospital, Army Medical University, Chongqing, China | ||
2Department of Infection and Immunity, State Key Laboratory of Trauma, Burn, and Combined Injury, Institute of Surgery Research and Daping Hospital, Army Medical University, Chongqing, China | ||
3Department of Clinical Medicine, Shandong University, Jinan, China | ||
چکیده | ||
Background: Hemin is an important sterile component that induces a neuroinflammatory response after intracerebral hemorrhage, in which NLRP3 inflammasome activation has also proved to be involved. Although microglial activation acts as a key contributor in the neuroinflammatory response, the relationship between hemin and NLRP3 in microglia remains poorly understood. Objective: To investigate whether or not hemin regulates microglia-mediated secondary injury through activating the NLRP3/caspase-1 signaling pathway in microglia. Methods: In this study, N9 microglial cells were treated with hemin, and subsequently used to detect the production of caspase-1 p10 and NLRP3 inflammasome assembly. An ELISA was subsequently performed to measure the secretion of IL-1β. Results: It was found that the production of activated caspase-1 was dose- and time-dependent with regards to hemin. Moreover, hemin was observed to be capable of inducing the assembly of the NLRP3 inflammasome without any increase in IL-1β. Similarly, the supernatant of hemin-treated primary microglial cells did not increase in IL-1β secretion. Furthermore, hemin-induced NLRP3 inflammasome activation did not significantly affect pyroptosis. Conclusion: Hemin is a potential sterile danger signal molecule that can induce inflammasome activation without directly mediating inflammation damage on microglia. | ||
کلیدواژهها | ||
Caspase-1؛ Hemin؛ Microglia؛ NLRP3 Inflammasome | ||
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