PMID- 31138763 OWN - NLM STAT- MEDLINE DCOM- 20200807 LR - 20200807 IS - 1573-4935 (Electronic) IS - 0144-8463 (Print) IS - 0144-8463 (Linking) VI - 39 IP - 6 DP - 2019 Jun 28 TI - Leukocyte immunoglobulin-like receptor B4 deficiency exacerbates acute lung injury via NF-kappaB signaling in bone marrow-derived macrophages. LID - BSR20181888 [pii] LID - 10.1042/BSR20181888 [doi] AB - Acute lung injury (ALI) is an acute inflammatory disease. Leukocyte immunoglobulin-like receptor B4 (LILRB4) is an immunoreceptor tyrosine-based inhibitory motif (ITIM)-bearing inhibitory receptor that is implicated in various pathological processes. However, the function of LILRB4 in ALI remains largely unknown. The aim of the present study was to explore the role of LILRB4 in ALI. LILRB4 knockout mice (LILRB4 KO) were used to construct a model of ALI. Bone marrow cell transplantation was used to identify the cell source of the LILRB4 deficiency-aggravated inflammatory response in ALI. The effect on ALI was analyzed by pathological and molecular analyses. Our results indicated that LILRB4 KO exacerbated ALI triggered by LPS. Additionally, LILRB4 deficiency can enhance lung inflammation. According to the results of our bone marrow transplant model, LILRB4 regulates the occurrence and development of ALI by bone marrow-derived macrophages (BMDMs) rather than by stromal cells in the lung. The observed inflammation was mainly due to BMDM-induced NF-kappaB signaling. In conclusion, our study demonstrates that LILRB4 deficiency plays a detrimental role in ALI-associated BMDM activation by prompting the NF-kappaB signal pathway. CI - (c) 2019 The Author(s). FAU - Qiu, Tao AU - Qiu T AUID- ORCID: 0000-0002-1410-7795 AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Zhou, Jiangqiao AU - Zhou J AUID- ORCID: 0000-0002-6118-0020 AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Wang, Tianyu AU - Wang T AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Chen, Zhongbao AU - Chen Z AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Ma, Xiaoxiong AU - Ma X AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Zhang, Long AU - Zhang L AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China. FAU - Zou, Jilin AU - Zou J AD - Department of Organ Transplantation, Renmin Hospital of Wuhan University, Wuhan University, Wuhan 430060, China zhoujq@whu.edu.cn. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20190614 PL - England TA - Biosci Rep JT - Bioscience reports JID - 8102797 RN - 0 (LILRB4 protein, human) RN - 0 (Lipopolysaccharides) RN - 0 (Membrane Glycoproteins) RN - 0 (NF-kappa B) RN - 0 (RELA protein, human) RN - 0 (Receptors, Immunologic) RN - 0 (Transcription Factor RelA) SB - IM MH - Acute Lung Injury/chemically induced/genetics/pathology/*therapy MH - Animals MH - Bone Marrow Cells/cytology MH - *Bone Marrow Transplantation MH - Female MH - Gene Expression Regulation/genetics MH - Humans MH - Immunoreceptor Tyrosine-Based Activation Motif/genetics MH - Lipopolysaccharides/toxicity MH - Macrophages/metabolism/pathology MH - Male MH - Membrane Glycoproteins/*genetics MH - Mice MH - Mice, Knockout MH - NF-kappa B/genetics MH - Pneumonia/genetics/pathology/*therapy MH - Receptors, Immunologic/*genetics MH - Signal Transduction/genetics MH - Transcription Factor RelA/genetics PMC - PMC6566464 OTO - NOTNLM OT - LILRB4 OT - acute lung injury OT - lung OT - macrophage COIS- The authors declare that there are no competing interests associated with the manuscript. EDAT- 2019/05/30 06:00 MHDA- 2020/08/08 06:00 PMCR- 2019/06/14 CRDT- 2019/05/30 06:00 PHST- 2018/10/14 00:00 [received] PHST- 2019/05/17 00:00 [revised] PHST- 2019/05/22 00:00 [accepted] PHST- 2019/05/30 06:00 [pubmed] PHST- 2020/08/08 06:00 [medline] PHST- 2019/05/30 06:00 [entrez] PHST- 2019/06/14 00:00 [pmc-release] AID - BSR20181888 [pii] AID - 10.1042/BSR20181888 [doi] PST - epublish SO - Biosci Rep. 2019 Jun 14;39(6):BSR20181888. doi: 10.1042/BSR20181888. Print 2019 Jun 28.