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Fu D, Gao S, Li JN, Cui YH, Luo YW, Zhong YJ, Li Q, Luo C, Dai RP, Luo RY, Hu ZL. P75 NTR+CD64 + neutrophils promote sepsis-induced acute lung injury. Clin Immunol 2024; 263:110206. [PMID: 38599263 DOI: 10.1016/j.clim.2024.110206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/24/2024] [Accepted: 03/30/2024] [Indexed: 04/12/2024]
Abstract
Patients suffering from sepsis-induced acute lung injury (ALI) exhibit a high mortality rate, and their prognosis is closely associated with infiltration of neutrophils into the lungs. In this study, we found a significant elevation of CD64+ neutrophils, which highly expressed p75 neurotrophin receptor (p75NTR) in peripheral blood of mice and patients with sepsis-induced ALI. p75NTR+CD64+ neutrophils were also abundantly expressed in the lung of ALI mice induced by lipopolysaccharide. Conditional knock-out of the myeloid lineage's p75NTR gene improved the survival rates, attenuated lung tissue inflammation, reduced neutrophil infiltration and enhanced the phagocytic functions of CD64+ neutrophils. In vitro, p75NTR+CD64+ neutrophils exhibited an upregulation and compromised phagocytic activity in blood samples of ALI patients. Blocking p75NTR activity by soluble p75NTR extracellular domain peptide (p75ECD-Fc) boosted CD64+ neutrophils phagocytic activity and reduced inflammatory cytokine production via regulation of the NF-κB activity. The findings strongly indicate that p75NTR+CD64+ neutrophils are a novel pathogenic neutrophil subpopulation promoting sepsis-induced ALI.
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Affiliation(s)
- Di Fu
- Department of Anesthesiology, The Xiangya Hospital, Central South University, Changsha City, Hunan 410008, China
| | - Shan Gao
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Jia-Nan Li
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Hui Cui
- Department of Anatomy and Neurobiology, School of Basic Medical Science, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Wei Luo
- Department of Blood Transfusion, The Third Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Yan-Jun Zhong
- Department of Critical Care Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiao Li
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Cong Luo
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Ru-Ping Dai
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China
| | - Ru-Yi Luo
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China.
| | - Zhao-Lan Hu
- Anesthesia Medical Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China; Department of Anesthesiology, The Second Xiangya Hospital, Central South University, Changsha City, Hunan 410011, China.
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Gong T, Zhang X, Liu X, Ye Y, Tian Z, Yin S, Zhang M, Tang J, Liu Y. Exosomal Tenascin-C primes macrophage pyroptosis amplifying aberrant inflammation during sepsis-induced acute lung injury. Transl Res 2024; 270:66-80. [PMID: 38604333 DOI: 10.1016/j.trsl.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/15/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Sepsis-induced acute lung injury (ALI) is a serious complication of sepsis and the predominant cause of death. Exosomes released by lung tissue cells critically influence the progression of ALI during sepsis by modulating the inflammatory microenvironment. However, the molecular mechanisms by which exosome-mediated intercellular signaling exacerbates ALI in septic infection remain undefined. Our study found increased levels of exosomal Tenascin-C (TNC) in the plasma of both patients and mice with ALI, showing a strong association with disease progression. By integrating exosomal proteomics with transcriptome sequencing and experimental validation, we elucidated that LPS induce unresolved endoplasmic reticulum stress (ERs) in alveolar epithelial cells (AECs), ultimately leading to the release of exosomal TNC through the activation of PERK-eIF2α and the transcription factor CHOP. In the sepsis mouse model with TNC knockout, we noted a marked reduction in macrophage pyroptosis. Our detailed investigations found that exosomal TNC binds to TLR4 on macrophages, resulting in an augmented production of ROS, subsequent mitochondrial damage, activation of the NF-κB signaling pathway, and induction of DNA damage response. These interconnected events culminate in macrophage pyroptosis, thereby amplifying the release of inflammatory cytokines. Our findings demonstrate that exosomal Tenascin-C, released from AECs under unresolved ER stress, exacerbates acute lung injury by intensifying sepsis-associated inflammatory responses. This research provides new insights into the complex cellular interactions underlying sepsis-induced ALI.
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Affiliation(s)
- Ting Gong
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.
| | - Xuedi Zhang
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Xiaolei Liu
- Department of Anaesthetics, Affiliated Hospital of Guangdong Medical University, No.57 People Avenue South, Zhanjiang, 524001, Guangdong, China
| | - Yinfeng Ye
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Zhiyuan Tian
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Shuang Yin
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Min Zhang
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China
| | - Jing Tang
- Department of Anaesthetics, Affiliated Hospital of Guangdong Medical University, No.57 People Avenue South, Zhanjiang, 524001, Guangdong, China.
| | - Youtan Liu
- Department of Anesthesiology, Shenzhen Hospital of Southern Medical University, No.1333, Xinhu Road, Baoan District, Shenzhen 518110, Guangdong, China; The Third School of Clinical Medicine, Southern Medical University, Guangzhou, China.
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Wang H, Lan Y, Luo L, Xiao Y, Meng X, Zeng Y, Wu J. The Scutellaria-Coptis herb couple and its active small-molecule ingredient wogonoside alleviate cytokine storm by regulating the CD39/NLRP3/GSDMD signaling pathway. J Ethnopharmacol 2024; 329:118155. [PMID: 38593962 DOI: 10.1016/j.jep.2024.118155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 03/28/2024] [Accepted: 04/04/2024] [Indexed: 04/11/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE A drug pair is a fundamental aspect of traditional Chinese medicine prescriptions. Scutellaria baicalensis Georgi and Coptis chinensis Franch, commonly used as an herb couple (SBCC), are representative heat-clearing and dampness-drying drugs. They possess functions such as clearing heat, drying dampness, purging fire, and detoxifying. These herbs are used in both traditional and modern medicine for treating inflammation. AIM OF THE STUDY This study investigated the effects of SBCC on cytokine storm syndrome (CSS) and explored its potential regulatory mechanism. MATERIALS AND METHODS We assessed the impact of SBCC in a sepsis-induced acute lung injury mouse model by administering an intraperitoneal injection of LPS (15 mg/kg). The cytokine levels in the serum and lungs, the wet-to-dry ratio of the lungs, and lung histopathological changes were evaluated. The macrophages in the lung tissue were examined through transmission electron microscopy. Western blot was used to measure the levels of the CD39/NLRP3/GSDMD pathway-related proteins. Immunofluorescence imaging was used to assess the activation of pro-caspase-1 and ASC and their interaction. AMP-Glo™ assay was used to screen for active ingredients in SBCC targeting CD39. One of the ingredients was selected, and its effect on cell viability was assessed. We induced inflammation in macrophages using LPS + ATP and detected the levels of proinflammatory factors. The images of cell membrane large pores were captured using scanning electron microscopy, the interaction between NLRP3 and ASC was detected using immunofluorescence imaging, and the levels of CD39/NLRP3/GSDMD pathway-related proteins were assessed using Western blot. RESULTS SBCC administration effectively mitigated LPS-induced cytokine storm, pulmonary edema and lung injury. Furthermore, it repressed the programmed death of lung tissue macrophages by inhibiting the NLRP3/GSDMD pyroptosis pathway and regulating the CD39 purinergic pathway. Based on the results of the AMP-Glo™ assay, we selected wogonoside for further valuation. Wogonoside alleviated LPS + ATP-induced inflammatory damage by regulating the inhibiting the NLRP3/GSDMD pyroptosis pathway and regulating the CD39 purinergic pathway. However, its effect on NLRP3 is not mediated though CD39. CONCLUSION SBCC and its active small-molecule ingredient, wogonoside, improved CSS by regulating the NLRP3/GSDMD pyroptosis pathway and its upstream CD39 purinergic pathway. It is essential to note that the regulatory effect of wogonoside on NLRP3 is not mediated by CD39.
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Affiliation(s)
- Huan Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China
| | - Yuejia Lan
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China
| | - Liuling Luo
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China
| | - Yang Xiao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China
| | - Xianli Meng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China; Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China
| | - Yong Zeng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China.
| | - Jiasi Wu
- Acupuncture and Tuina School, Chengdu University of Traditional Chinese Medicine, Chengdu, 611130, China.
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Liang J, Zhang J, Fan J, Chen S, Wu W. ANXA3 interference inactivates ERK/ELK1 pathway to mitigate inflammation and apoptosis in sepsis-associated acute lung injury. Mol Immunol 2024; 167:25-33. [PMID: 38310670 DOI: 10.1016/j.molimm.2024.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 12/21/2023] [Accepted: 01/08/2024] [Indexed: 02/06/2024]
Abstract
Acute lung injury (ALI) is a prevailing and deadly complication of sepsis coupled with increasing incidence and fatality rate. Annexin A3 (ANXA3) has been unraveled to be upregulated during sepsis. This study purposed to assess the role and the mechanism of ANXA3 in sepsis-induced ALI. After the construction of mouse model of sepsis, the pathological changes of mice lung tissues were estimated by H&E staining. ANXA3 expression in mice lung tissues and serum was examined. The degree of pulmonary edema and the levels of inflammatory factors in bronchoalveolar lavage fluid (BALF) were analyzed. In lipopolysaccharide (LPS)-induced mouse ALI model in vitro, CCK-8 assay measured cell viability and flow cytometry analysis detected cell apoptosis. Besides, ELISA assay detected the release of inflammatory cytokines. Western blot analyzed the expression of proteins associated with inflammation, apoptosis and extracellular-signal-regulated kinase (ERK)/ETS-like gene 1 (ELK1) signaling. Results revealed that ANXA3 was overexpressed in the lung tissues and serum of septic mice. Following the knockdown of ANXA3, sepsis-induced lung injury was alleviated, manifested as reduced lung edema, decreased inflammatory cell infiltration and inhibited cell apoptosis. Additionally, ANXA3 silence blocked ERK/ELK1 signaling both in sepsis mouse models and in vitro model of ALI induced by lipopolysaccharide (LPS). Moreover, the inhibitory effects of ANXA3 silencing on ERK/ELK1 signaling activation, the viability damage, inflammation and apoptosis in LPS-induced mouse ALI model in vitro were partially reversed by ERK activator. Collectively, depletion of ANXA3 exerted suppressive effects on the inflammation and apoptosis in sepsis-induced ALI through blocking ERK/ELK1 signaling.
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Affiliation(s)
- Jifang Liang
- Intensive Care Unit, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030032, China; Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
| | - Junkun Zhang
- Third Hospital of Shanxi Medical University, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Taiyuan, Shanxi, 030032, China
| | - Jixiu Fan
- General Medical Department, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030032, China; General Medical Department, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Shuxian Chen
- Intensive Care Unit, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030032, China; Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China
| | - Weidong Wu
- Intensive Care Unit, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, Shanxi, 030032, China; Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030, China.
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Ling X, Wei S, Ling D, Cao S, Chang R, Wang Q, Yuan Z. Irf7 regulates the expression of Srg3 and ferroptosis axis aggravated sepsis-induced acute lung injury. Cell Mol Biol Lett 2023; 28:91. [PMID: 37946128 PMCID: PMC10634032 DOI: 10.1186/s11658-023-00495-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/27/2023] [Indexed: 11/12/2023] Open
Abstract
OBJECTIVE To investigate the mechanism of action of Srg3 in acute lung injury caused by sepsis. METHODS First, a sepsis-induced acute lung injury rat model was established using cecal ligation and puncture (CLP). RNA sequencing (RNA-seq) was used to screen for highly expressed genes in sepsis-induced acute lung injury (ALI), and the results showed that Srg3 was significantly upregulated. Then, SWI3-related gene 3 (Srg3) was knocked down using AAV9 vector in vivo, and changes in ALI symptoms in rats were analyzed. In vitro experiments were conducted by establishing a cell model using lipopolysaccharide (LPS)-induced BEAS-2B cells and coculturing them with phorbol 12-myristate 13-acetate (PMA)-treated THP-1 cells to analyze macrophage polarization. Next, downstream signaling pathways regulated by Srg3 and transcription factors involved in regulating Srg3 expression were analyzed using the KEGG database. Finally, gain-of-loss functional validation experiments were performed to analyze the role of downstream signaling pathways regulated by Srg3 and transcription factors involved in regulating Srg3 expression in sepsis-induced acute lung injury. RESULTS Srg3 was significantly upregulated in sepsis-induced acute lung injury, and knocking down Srg3 significantly improved the symptoms of ALI in rats. Furthermore, in vitro experiments showed that knocking down Srg3 significantly weakened the inhibitory effect of LPS on the viability of BEAS-2B cells and promoted alternative activation phenotype (M2) macrophage polarization. Subsequent experiments showed that Srg3 can regulate the activation of the NF-κB signaling pathway and promote ferroptosis. Specific activation of the NF-κB signaling pathway or ferroptosis significantly weakened the effect of Srg3 knockdown. It was then found that Srg3 can be transcriptionally activated by interferon regulatory factor 7 (Irf7), and specific inhibition of Irf7 significantly improved the symptoms of ALI. CONCLUSIONS Irf7 transcriptionally activates the expression of Srg3, which can promote ferroptosis and activate classical activation phenotype (M1) macrophage polarization by regulating the NF-κB signaling pathway, thereby exacerbating the symptoms of septic lung injury.
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Affiliation(s)
- Xinyu Ling
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China
| | - Shiyou Wei
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China
| | - Dandan Ling
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Siqi Cao
- School of Clinical Medicine, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Rui Chang
- Medical Department, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China
| | - Qiuyun Wang
- Department of Anesthesiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
| | - Zhize Yuan
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China.
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Zhou W, Kang S, Wang F, Qin Y, Liu J, Xiao X, Chen X, Zhang D. Chromofungin, a chromogranin A-derived peptide, protects against sepsis-induced acute lung injury by inhibiting LBP/TLR4-dependent inflammatory signaling. Eur J Pharmacol 2023; 958:176043. [PMID: 37704044 DOI: 10.1016/j.ejphar.2023.176043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 08/28/2023] [Accepted: 08/31/2023] [Indexed: 09/15/2023]
Abstract
Chromofungin (CHR) is a biologically active peptide derived from chromogranin A that exhibits anti-inflammatory effects. However, it remains unclear whether and how CHR protects against sepsis-induced acute lung injury (ALI). A murine model of sepsis-induced ALI was established through cecal ligation and puncture, with intraperitoneal injection of CHR. Lung inflammation and macrophage polarization were examined by measuring the levels of cytokines and markers of M1 (CD86, inducible nitric oxide synthase [iNOS]) or M2 macrophages (arginase-1 [Arg1], resistin-like molecule α1 [Fizz1] and CD206). In vitro, mouse MH-S cells pretreated with CHR was employed to explore the interplay between the lipopolysaccharide-binding protein (LBP)/toll-like receptor 4 (TLR4) signaling pathway and M1/M2 polarity. The results revealed CHR's ability to enhance the 7-day survival rate and protect lung pathological injury in sepsis-induced ALI. CHR increased the expression of interleukin-4 and interleukin-10 but decreased the expression of tumour necrosis factor-α and interleukin-1β. In addition, CHR notably facilitated M2 macrophage polarization, while significantly suppressingM1 polarization of alveolar macrophages. Mechanistic investigations delineated CHR's role in macrophage polarization by downregulating nuclear factor-κB expression through modulation of the LBP/TLR4 signaling pathway. Therefore, CHR may represent a novel strategy for the prevention of sepsis-induced ALI.
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Affiliation(s)
- Wushuang Zhou
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Shengnan Kang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Fenglin Wang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Yupin Qin
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Jinglun Liu
- Department of Surgical Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Xiaoqiu Xiao
- The Chongqing Key Laboratory of Translational Medicine in Major Metabolic Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China
| | - Xiaoying Chen
- Department of Surgical Care Unit, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
| | - Dan Zhang
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016, PR China.
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Miao RF, Tu J. LncRNA CDKN2B-AS1 interacts with LIN28B to exacerbate sepsis-induced acute lung injury by inducing HIF-1α/NLRP3-mediated pyroptosis. Kaohsiung J Med Sci 2023; 39:883-895. [PMID: 37265187 DOI: 10.1002/kjm2.12697] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/23/2023] [Accepted: 05/02/2023] [Indexed: 06/03/2023] Open
Abstract
Sepsis-associated acute lung injury (ALI) is a life-threatening condition in intensive care units with high mortality. LncRNAs have been confirmed to participate in the underlying pathogenesis of septic ALI. This study investigated the biological functions of lncRNA CDKN2B-AS1 in septic ALI and its potential mechanism.BEAS-2B cells were challenged with lipopolysaccharide (LPS) and mice were subjected to caecal ligation and puncture (CLP) to induce septic ALI in vitro and in vivo. The expression levels of CDKN2B-AS1, LIN28B, HIF-1α, and pyroptosis-related molecules were assessed by qRT-PCR or Western blotting. The production of IL-1β and IL-18 was detected by ELISA. BEAS-2B cell pyroptosis was examined by flow cytometry. The interaction between LIN28B and CDKN2B-AS1/HIF-1α was validated by RIP and RNA pull-down assays. Colocalization of CDKN2B-AS1 and LIN28B was observed by FISH. ALI was determined by HE staining, the lung wet-to-dry (W/D) weight ratio, inflammatory cell numbers, and total protein concentration in bronchoalveolar lavage fluid (BALF). Caspase-1 expression in the lung tissues was examined by immunohistochemical staining.CDKN2B-AS1 was upregulated in BEAS-2B cells after LPS stimulation. CDKN2B-AS1 knockdown inhibited pyroptosis in LPS-exposed BEAS-2B cells in vitro and the lung tissues of septic mice in vivo. Mechanistically, CDKN2B-AS1 interacted with LIN28B to enhance HIF-1α stability. Rescue experiments showed that HIF-1α overexpression counteracted the inhibitory effect of sh-CDKN2B-AS1 on LPS-induced pyroptosis. CDKN2B-AS1 bound to LIN28B to trigger NLRP3-mediated pyroptosis by stabilizing HIF-1α, which promoted sepsis-induced ALI. CDKN2B-AS1 might be a novel therapeutic target for this disease.
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Affiliation(s)
- Run-Feng Miao
- Department of Emergency, Affiliated Hospital of Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
| | - Jing Tu
- Department of Emergency, Affiliated Hospital of Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
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Liu Y, Yang H, Zhu F, Ouyang Y, Pan P. Inhibition of STAT3 phosphorylation by colchicine regulates NLRP3 activation to alleviate sepsis-induced acute lung injury. Inflammopharmacology 2023:10.1007/s10787-023-01199-9. [PMID: 37115345 DOI: 10.1007/s10787-023-01199-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 03/17/2023] [Indexed: 04/29/2023]
Abstract
The pharmacotherapeutic mechanism of colchicine, a tricyclic, lipid-soluble alkaloid extracted from the plant of the Lily family Colchicum autumnale, has not been fully understood in diverse disorders, including sepsis-induced acute lung injury (ALI). The study aimed at exploring the impact of colchicine on sepsis-induced ALI and the relevant mechanisms. Colchicine significantly attenuated ALI in mice caused by sepsis by alleviating respiratory dysfunction and pulmonary edema in mice, inhibiting NLRP3 inflammasome formation, and reducing oxidative stress, pyroptosis, and apoptosis of murine alveolar macrophage (J774A.1) cells. The targets of colchicine were predicted in the superPRED database and intersected with the differentially expressed genes in the GSE5883 and GSE129775 datasets. The major targets were subjected to protein-protein interaction network generation and Kyoto Encyclopedia of Genes and Genomes enrichment analysis. It was thus found that colchicine inhibited STAT3 phosphorylation but did not alter STAT3 total protein expression. Phosphorylated STAT3 recruited EP300 to form a complex to promote histone H3 acetylation and histone H4 acetylation of NLRP3 promoter, leading to pyroptosis of J774A.1 cells. In conclusion, inhibition of STAT3 phosphorylation by colchicine represses NLRP3 promoter acetylation via the STAT3/EP300 complex, thereby alleviating ALI caused by sepsis.
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Affiliation(s)
- Yuanshui Liu
- Department of Respiratory Medicine, Key Cite of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, No. 87, Xiangya Road, Kaifu District, Changsha, 410008, Hunan, People's Republic of China
- Department of Emergency Medicine, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, 570311, Hainan, People's Republic of China
| | - Hang Yang
- Department of Respiratory Medicine, Key Cite of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, No. 87, Xiangya Road, Kaifu District, Changsha, 410008, Hunan, People's Republic of China
| | - Fei Zhu
- Department of Respiratory Medicine, Key Cite of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, No. 87, Xiangya Road, Kaifu District, Changsha, 410008, Hunan, People's Republic of China
| | - Yanhong Ouyang
- Department of Emergency Medicine, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, 570311, Hainan, People's Republic of China
| | - Pinhua Pan
- Department of Respiratory Medicine, Key Cite of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, No. 87, Xiangya Road, Kaifu District, Changsha, 410008, Hunan, People's Republic of China.
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Yang H, Zhang C, Zhao Z. Lipopolysaccharide-induced lung cell inflammation and apoptosis are enhanced by circ_0003420/miR-424-5p/TLR4 axis via inactivating the NF-κB signaling pathway. Transpl Immunol 2022; 74:101639. [PMID: 35667541 DOI: 10.1016/j.trim.2022.101639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Circular RNAs (circRNAs) can regulate disease progression, including sepsis-induced acute lung injury (ALI). This research aimed at investigating the function of circ_0003420 in lipopolysaccharide (LPS)-treated lung cells, as well as the functional mechanism. METHODS Enzyme-linked immunosorbent assay was used for inflammation analysis. Cell viability and proliferation were examined using Cell Counting Kit-8 assay and EdU assay. Cell apoptosis was measured by flow cytometry. Western blot was used for protein detection. Reverse transcription-quantitative polymerase chain reaction assay was performed for quantification of circ_0003420, microRNA-424-5p (miR-424-5p) or toll-like receptor (TLR4). The interaction between miR-424-5p and circ_0003420 or TLR4 was conducted through dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. RESULTS Lung cell inflammation and apoptosis were promoted, but cell viability and proliferation were inhibited by LPS. Silence of circ_0003420 attenuated the LPS-mediated lung cell injury. Circ_0003420 could interact with miR-424-5p. The protective function by knockdown of si-circ_0003420 was relieved by miR-424-5p inhibition in LPS-treated cells. TLR4 served as a downstream target of miR-424-5p. Overexpression of miR-424-5p repressed inflammatory and apoptotic damages in LPS-treated lung cells via downregulating TLR4. Circ_0003420 upregulated the TLR4 level by targeting miR-424-5p and circ_0003420 regulated the NF-κB signaling pathway through the miR-424-5p/TLR4 axis. CONCLUSION These results uncovered that circ_0003420 contributed to the LPS-induced lung cell injury via activating the miR-424-5p/TLR4-related NF-κB signaling pathway. Circ_0003420 might be a therapeutic target in sepsis-induced ALI.
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Affiliation(s)
- Hailing Yang
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Chunmei Zhang
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Zhongyan Zhao
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China.
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Sui X, Liu W, Liu Z. Exosomes derived from LPS-induced MHs cells prompted an inflammatory response in sepsis-induced acute lung injury. Respir Physiol Neurobiol 2021; 292:103711. [PMID: 34091074 DOI: 10.1016/j.resp.2021.103711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/30/2021] [Accepted: 06/02/2021] [Indexed: 01/04/2023]
Abstract
Exosome is a novel tool with an essential role in cell communication. However, its role in the pathogenesis of sepsis-induced acute lung injury is currently unknown. Here, we first found that lipopolysaccharide (LPS) could up-regulate the expression of pro-inflammatory cytokines and promote exosomes release in the murine alveolar macrophage cell line (MHs cells). Moreover, we found MHs cells derived exosomes also maintain the pro-inflammatory effect after LPS stimulation. Treating with hydrochloride hydrate (GW4869) could dose-dependently downregulated the release of exosomes and inhibited the upregulation of inflammatory cytokines in MHs cells with LPS treatment. Also, we further identified GW4869 administration induced the remission of histopathologic changes, the reduction of pro-inflammatory cytokines in lung tissue, and inhibit serum exosomes release. These results indicate that the downregulation of exosome release by GW4869 might protect lung tissue from LPS induced injury through the suppression of excessive inflammatory responses, suggesting its potential therapeutic effects on sepsis-induced acute lung injury.
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Affiliation(s)
- Xintong Sui
- Emergency Department, First Hospital of China Medical University, Shenyang City, 110001, Liaoning Province, China.
| | - Wei Liu
- Emergency Department, First Hospital of China Medical University, Shenyang City, 110001, Liaoning Province, China.
| | - Zhi Liu
- Emergency Department, First Hospital of China Medical University, Shenyang City, 110001, Liaoning Province, China.
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Jiang L, Ni J, Shen G, Xia Z, Zhang L, Xia S, Pan S, Qu H, Li X. Upregulation of endothelial cell-derived exosomal microRNA-125b-5p protects from sepsis-induced acute lung injury by inhibiting topoisomerase II alpha. Inflamm Res 2021; 70:205-216. [PMID: 33386874 PMCID: PMC7776283 DOI: 10.1007/s00011-020-01415-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 10/10/2020] [Accepted: 10/20/2020] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE Emerging evidence has revealed that exosomal microRNAs (miRNAs) are implicated in human diseases. However, role of exosomal miR-125b-5p in sepsis-induced acute lung injury (ALI) remains further explored. We focused on the effect of exosomal miR-125b-5p on ALI progression via targeting topoisomerase II alpha (TOP2A). METHODS The ALI mouse models were established by cecal ligation and perforation, which were then treated with miR-125b-5p agomir or overexpressed TOP2A. Next, the pathological structure of ALI mouse lung tissues were observed, miR-125b-5p, TOP2A and vascular endothelial growth factor (VEGF) expression was determined, and the lung water content, inflammatory response, protein content in bronchoalveolar lavage fluid (BALF) and cell apoptosis in ALI mouse lung tissues were assessed. Exosomes were extracted from endothelial cells (ECs) and identified, which were then injected into the modeled mice to observe their roles in ALI. The targeting relationship between miR-125b-5p and TOP2A was confirmed. RESULTS MiR-125b-5p was downregulated while TOP2A was upregulated in ALI mice. MiR-125b-5p elevation or ECs-derived exosomes promoted VEGF expression, improved pathological changes and restrained lung water content, inflammatory response, protein content in BALF and cell apoptosis in lung tissues ALI mice. TOP2A overexpression reversed the repressive role of miR-125b-5p upregulation in ALI, while downregulated miR-125b-5p abrogated the effect of ECs-derived exosomes on ALI. TOP2A was confirmed as a direct target gene of miR-125b-5p. CONCLUSION Our study indicates that ECs-derived exosomes overexpressed miR-125b-5p to protect from sepsis-induced ALI by inhibiting TOP2A, which may contribute to ALI therapeutic strategies.
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Affiliation(s)
- Lijing Jiang
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Jindi Ni
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Guofeng Shen
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Zhuye Xia
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Lu Zhang
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Shihong Xia
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Shengfu Pan
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China
| | - Hongping Qu
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Xiang Li
- Department of Critical Care Medicine, Minhang Hospital, Fudan University, No. 39, Xinling Road, Minhang District, Shanghai, 201199, China.
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