PMID- 29941462 OWN - NLM STAT- MEDLINE DCOM- 20190305 LR - 20190305 IS - 1098-5522 (Electronic) IS - 0019-9567 (Print) IS - 0019-9567 (Linking) VI - 86 IP - 9 DP - 2018 Sep TI - High Mobility Group Protein 1 Reverses Immune System Paralysis in Late-Phase Sepsis. LID - 10.1128/IAI.00455-18 [doi] LID - e00455-18 AB - High mobility group protein 1 (HMGB1) is considered to be the primary inflammatory factor triggering immune paralysis in late-phase sepsis. In this study, however, we wanted to explore the possibility of using HMGB1 to boost local differentiation of bone marrow cells (BMCs) into regulatory dendritic cells (DCs) in vivo, thereby inducing immune reversal in late-phase sepsis and improving the prognosis. For this purpose, sepsis was induced by cecal ligation and puncture (CLP). Mice were injected intraperitoneally with HMGB1 (10, 50, or 250 mug/kg of body weight) 7 days before CLP. BMCs and liver immune cells were isolated at 0, 3, 5, and 7 days post-CLP. Mice were intranasally infected with Pseudomonas aeruginosa 3 days post-CLP as a secondary pneumonia infection model. BMCs and liver cells isolated from septic mice pretreated with HMGB1 were adoptively transferred into CLP mice. GFP(+)-C57BL/6 and C3H/HeN-C3H/HeJ parabiosis models were established. We found that HMGB1 pretreatment improved the survival of sepsis and increased the numbers of BMCs and liver immune cells in CLP mice. Furthermore, HMGB1 stimulation improved survival in the secondary pneumonia infection model. HMGB1 increased the number as well as the percentage of CD11c(-) CD45RB(high) DCs in septic BM and liver. Adoptive transfer of septic cells pretreated with HMGB1 into CLP mice attenuated sepsis. HMGB1 enhanced the redistribution of CD11c(-) CD45RB(high) DCs through TLR4 signaling in parabiosis models. We conclude that HMGB1 triggers immune reversal through the mobilization, redistribution, and local immune differentiation of BMCs, thereby compensating for impaired immunity and leading to sufficient bacterial eradication. CI - Copyright (c) 2018 American Society for Microbiology. FAU - Liu, Qing-Yang AU - Liu QY AD - Department of Translational Medicine and Nephrology, China Meitan General Hospital, Beijing, China qingyangliu_ccm@sina.com xukaizhi195601@163.com. AD - Department of Microbiology and Immunology, Burns Institute, First Hospital Affiliated to the Chinese PLA General Hospital, Beijing, China. FAU - Wang, Yue-Xin AU - Wang YX AD - First Department of Orthopedics, Tangshan Worker's Hospital Affiliated to Hebei Medical University, Tangshan, Hebei Province, China. FAU - Wu, Zong-Sheng AU - Wu ZS AD - Department of Emergency, Zhongda Hospital Affiliated to Southeast University, Nanjing, China. FAU - Shi, Zhen-Wei AU - Shi ZW AD - Department of Translational Medicine and Nephrology, China Meitan General Hospital, Beijing, China. FAU - Wu, Xu AU - Wu X AD - Becton-Dickinson Biosciences, Beijing, China. FAU - Chen, Xin AU - Chen X AD - Department of Oncology, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China. FAU - Yang, Zhao AU - Yang Z AD - College of Chemistry, Beijing Normal University, Beijing, China. FAU - Xu, Kai-Zhi AU - Xu KZ AD - Department of Anesthesiology, Tangshan Worker's Hospital Affiliated to Hebei Medical University, Tangshan, Hebei Province, China qingyangliu_ccm@sina.com xukaizhi195601@163.com. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180822 PL - United States TA - Infect Immun JT - Infection and immunity JID - 0246127 RN - 0 (HMGB1 Protein) RN - 0 (Tlr4 protein, mouse) RN - 0 (Toll-Like Receptor 4) SB - IM MH - Adoptive Transfer MH - Animals MH - Bone Marrow Cells/immunology MH - Cecum MH - Cell Differentiation MH - Dendritic Cells/immunology MH - Disease Models, Animal MH - HMGB1 Protein/*immunology/*pharmacology MH - Ligation MH - Mice, Inbred C3H MH - Mice, Inbred C57BL MH - Parabiosis MH - Pneumonia/*immunology/microbiology MH - Pseudomonas Infections/blood/drug therapy MH - Pseudomonas aeruginosa/immunology MH - Sepsis/*drug therapy/*immunology/microbiology MH - Toll-Like Receptor 4/immunology PMC - PMC6105879 OTO - NOTNLM OT - CD11c- CD45RBhigh dendritic cells OT - bone marrow cells OT - high mobility group protein 1 OT - sepsis EDAT- 2018/06/27 06:00 MHDA- 2019/03/06 06:00 PMCR- 2019/02/22 CRDT- 2018/06/27 06:00 PHST- 2018/06/14 00:00 [received] PHST- 2018/06/19 00:00 [accepted] PHST- 2018/06/27 06:00 [pubmed] PHST- 2019/03/06 06:00 [medline] PHST- 2018/06/27 06:00 [entrez] PHST- 2019/02/22 00:00 [pmc-release] AID - IAI.00455-18 [pii] AID - 00455-18 [pii] AID - 10.1128/IAI.00455-18 [doi] PST - epublish SO - Infect Immun. 2018 Aug 22;86(9):e00455-18. doi: 10.1128/IAI.00455-18. Print 2018 Sep.