PMID- 29636842 OWN - NLM STAT- MEDLINE DCOM- 20180917 LR - 20191210 IS - 1942-0994 (Electronic) IS - 1942-0900 (Print) IS - 1942-0994 (Linking) VI - 2018 DP - 2018 TI - A Novel Mechanism of Mesenchymal Stromal Cell-Mediated Protection against Sepsis: Restricting Inflammasome Activation in Macrophages by Increasing Mitophagy and Decreasing Mitochondrial ROS. PG - 3537609 LID - 10.1155/2018/3537609 [doi] LID - 3537609 AB - Sepsis, a systemic inflammatory response to infection, is the leading cause of death in the intensive care unit (ICU). Previous studies indicated that mesenchymal stromal cells (MSCs) might have therapeutic potential against sepsis. The current study was designed to investigate the effects of MSCs on sepsis and the underlying mechanisms focusing on inflammasome activation in macrophages. The results demonstrated that the bone marrow-derived mesenchymal stem cells (BMSCs) significantly increased the survival rate and organ function in cecal ligation and puncture (CLP) mice compared with the control-grouped mice. BMSCs significantly restricted NLRP3 inflammasome activation, suppressed the generation of mitochondrial ROS, and decreased caspase-1 and IL-1beta activation when cocultured with bone marrow-derived macrophages (BMDMs), the effects of which could be abolished by Mito-TEMPO. Furthermore, the expression levels of caspase-1, IL-1beta, and IL-18 in BMDMs were elevated after treatment with mitophagy inhibitor 3-MA. Thus, BMSCs exert beneficial effects on inhibiting NLRP3 inflammasome activation in macrophages primarily via both enhancing mitophagy and decreasing mitochondrial ROS. These findings suggest that restricting inflammasome activation in macrophages by increasing mitophagy and decreasing mitochondrial ROS might be a crucial mechanism for MSCs to combat sepsis. FAU - Li, Shuang AU - Li S AD - Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China. AD - Department of Cardiology, Chengdu Military General Hospital, Chengdu 610083, China. FAU - Wu, Hao AU - Wu H AUID- ORCID: 0000-0003-4563-3365 AD - Department of Toxicology, School of Public Health, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. FAU - Han, Dong AU - Han D AUID- ORCID: 0000-0002-0545-3338 AD - Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. FAU - Ma, Sai AU - Ma S AUID- ORCID: 0000-0002-7638-9900 AD - Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. FAU - Fan, Wensi AU - Fan W AD - Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. FAU - Wang, Yabin AU - Wang Y AUID- ORCID: 0000-0002-7966-6117 AD - Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China. FAU - Zhang, Ran AU - Zhang R AD - Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China. FAU - Fan, Miaomiao AU - Fan M AD - Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China. FAU - Huang, Yuesheng AU - Huang Y AD - Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Southwest Hospital, Third Military Medical University, Chongqing 400038, China. FAU - Fu, Xiaobing AU - Fu X AUID- ORCID: 0000-0002-2465-1700 AD - Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China. FAU - Cao, Feng AU - Cao F AUID- ORCID: 0000-0002-1010-6429 AD - Department of Cardiology & National Clinical Research Center of Geriatrics Disease, Chinese PLA General Hospital, Beijing 100853, China. LA - eng PT - Journal Article DEP - 20180213 PL - United States TA - Oxid Med Cell Longev JT - Oxidative medicine and cellular longevity JID - 101479826 RN - 0 (Inflammasomes) RN - 0 (Interleukin-1beta) RN - 0 (NLR Family, Pyrin Domain-Containing 3 Protein) RN - 0 (Reactive Oxygen Species) RN - EC 2.3.2.27 (Ubiquitin-Protein Ligases) RN - EC 2.3.2.27 (parkin protein) RN - EC 3.4.22.36 (Caspase 1) SB - IM MH - Animals MH - Caspase 1/metabolism MH - Cecum/pathology MH - Enzyme Activation MH - Inflammasomes/*metabolism MH - Inflammation/pathology MH - Injections, Intravenous MH - Interleukin-1beta/metabolism MH - Ligation MH - Macrophages/*metabolism/pathology MH - *Mesenchymal Stem Cell Transplantation MH - Mesenchymal Stem Cells/*cytology/metabolism MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Mitochondria/*metabolism MH - *Mitophagy MH - NLR Family, Pyrin Domain-Containing 3 Protein/metabolism MH - Punctures MH - Reactive Oxygen Species/*metabolism MH - Sepsis/prevention & control/*therapy MH - Survival Analysis MH - Ubiquitin-Protein Ligases/metabolism PMC - PMC5831900 EDAT- 2018/04/11 06:00 MHDA- 2018/09/18 06:00 PMCR- 2018/02/13 CRDT- 2018/04/12 06:00 PHST- 2017/07/30 00:00 [received] PHST- 2017/11/02 00:00 [revised] PHST- 2017/12/04 00:00 [accepted] PHST- 2018/04/12 06:00 [entrez] PHST- 2018/04/11 06:00 [pubmed] PHST- 2018/09/18 06:00 [medline] PHST- 2018/02/13 00:00 [pmc-release] AID - 10.1155/2018/3537609 [doi] PST - epublish SO - Oxid Med Cell Longev. 2018 Feb 13;2018:3537609. doi: 10.1155/2018/3537609. eCollection 2018.