PMID- 33088477 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220417 IS - 2045-3701 (Print) IS - 2045-3701 (Electronic) IS - 2045-3701 (Linking) VI - 10 DP - 2020 TI - Identification of atypical mitogen-activated protein kinase MAPK4 as a novel regulator in acute lung injury. PG - 121 LID - 10.1186/s13578-020-00484-2 [doi] LID - 121 AB - BACKGROUND: Acute lung injury (ALI) is a serious disease with highly morbidity and mortality that causes serious health problems worldwide. Atypical mitogen activated protein kinases (MAPKs) play critical roles in the development of tissues and have been proposed as promising therapeutic targets for various diseases. However, the potential role of atypical MAPKs in ALI remains elusive. In this study, we investigated the role of atypical MAPKs family member MAPK4 in ALI using LPS-induced murine ALI model. RESULTS: We found that MAPK4 deficiency mice exhibited prolonged survival time after LPS challenge, accompanied by alleviated pathology in lung tissues, decreased levels of pro-inflammatory cytokines and altered composition of immune cells in BALF. Furthermore, the transduction of related signaling pathways, including MK5, AKT, JNK, and p38 MAPK pathways, was reduced obviously in LPS-treated MAPK4(-/-) mice. Notably, the expression of MAPK4 was up-regulated in lung tissues of ALI model, which was not related with MAPK4 promoter methylation, but negatively orchestrated by transcriptional factors NFKB1 and NR3C1. Further studies have shown that the expression of MAPK4 was also increased in LPS-treated macrophages. Meanwhile, MAPK4 deficiency reduced the expression of related pro-inflammatory cytokines in macrophage in response to LPS treatment. Finally, MAPK4 knockdown using shRNA pre-treatment could ameliorate the pathology of lung tissues and prolong the survival time of mice after LPS challenge. CONCLUSIONS: Collectively, these findings reveal an important biological function of atypical MAPK in mediating the pathology of ALI, indicating that MAPK4 might be a novel potential therapeutic target for ALI treatment. CI - (c) The Author(s) 2020. FAU - Mao, Ling AU - Mao L AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Zhou, Ya AU - Zhou Y AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Medical Physics, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Chen, Longqing AU - Chen L AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Hu, Lin AU - Hu L AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Liu, Shiming AU - Liu S AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Zheng, Wen AU - Zheng W AD - Department of Laboratory Medicine, Qiannan Medical College for Nationalities, Guizhou, 558000 China. FAU - Zhao, Juanjuan AU - Zhao J AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Guo, Mengmeng AU - Guo M AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - Chen, Chao AU - Chen C AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 FAU - He, Zhixu AU - He Z AD - Department of Paediatrics, Affiliated Hospital of Zunyi Medical University, Guizhou, 563000 China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Key Laboratory of Adult Stem Cell Transformation Research, Chinese Academy of Medical Sciences, Guizhou, 563000 China. FAU - Xu, Lin AU - Xu L AD - Special Key Laboratory of Gene Detection & Therapy of Guizhou Province, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 AD - Department of Immunology, Zunyi Medical University, Zunyi, 563003 Guizhou China. GRID: grid.417409.f. ISNI: 0000 0001 0240 6969 LA - eng PT - Journal Article DEP - 20201019 PL - England TA - Cell Biosci JT - Cell & bioscience JID - 101561195 PMC - PMC7570399 OTO - NOTNLM OT - ALI OT - MAPK4 OT - NFKB1 OT - NR3C1 OT - shRNA COIS- Competing interestsThe authors declare that they have no conflict of interest. EDAT- 2020/10/23 06:00 MHDA- 2020/10/23 06:01 PMCR- 2020/10/19 CRDT- 2020/10/22 05:37 PHST- 2020/07/20 00:00 [received] PHST- 2020/10/10 00:00 [accepted] PHST- 2020/10/22 05:37 [entrez] PHST- 2020/10/23 06:00 [pubmed] PHST- 2020/10/23 06:01 [medline] PHST- 2020/10/19 00:00 [pmc-release] AID - 484 [pii] AID - 10.1186/s13578-020-00484-2 [doi] PST - epublish SO - Cell Biosci. 2020 Oct 19;10:121. doi: 10.1186/s13578-020-00484-2. eCollection 2020.