M1 Macrophage Polarization Is Dependent on TRPC1-Mediated Calcium Entry.

M1 Macrophage Polarization Is Dependent on TRPC1-Mediated Calcium Entry.
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DOI:
10.1016/j.isci.2018.09.014
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发表时间:
2018-10-26
期刊:
影响因子:
5.8
通讯作者:
Mishra BB
Mishra BB
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Chauhan A;Sun Y;Sukumaran P;Quenum Zangbede FO;Jondle CN;Sharma A;Evans DL;Chauhan P;Szlabick RE;Aaland MO;Birnbaumer L;Sharma J;Singh BB;Mishra BB

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Macrophage plasticity is essential for innate immunity, but in-depth signaling mechanism(s) regulating their functional phenotypes are ill-defined. Here we report that interferon (IFN) γ priming of naive macrophages induces store-mediated Ca2+ entry and inhibition of Ca2+ entry impairs polarization to M1 inflammatory phenotype. In vitro and in vivo functional analyses revealed ORAI1 to be a primary contributor to basal Ca2+ influx in macrophages, whereas IFNγ-induced Ca2+ influx was mediated by TRPC1. Deficiency of TRPC1 displayed abrogated IFNγ-induced M1 inflammatory mediators in macrophages. In a preclinical model of peritonitis by Klebsiella pneumoniae infection, macrophages showed increased Ca2+ influx, which was TRPC1 dependent. Macrophages from infected TRPC1−/− mice showed inhibited expression of M1-associated signature molecules. Furthermore, in human patients with systemic inflammatory response syndrome, the level of TRPC1 expression in circulating macrophages directly correlated with M1 inflammatory mediators. Overall, TRPC1-mediated Ca2+ influx is essential for the induction/shaping of macrophage polarization to M1 inflammatory phenotype. TRPC1 mediates sterile or infection-induced Ca2+ influx and M1 phenotype in macrophages ORAI1 mediates the basal Ca2+ influx in macrophages In patients with SIRS, the TRPC1 level correlates with M1 inflammatory mediators in macrophages Biological Sciences; Immune Response; Immunology
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