1
|
Nguyen TH, Nguyen HHN, Nguyen TD, Tran VTH, Nguyen HA, Pham DV. NLRP3 inflammasome activation contributes to the development of the pro-fibrotic phenotype of lung fibroblasts. Biochem Pharmacol 2024; 229:116496. [PMID: 39159876 DOI: 10.1016/j.bcp.2024.116496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 07/03/2024] [Accepted: 08/16/2024] [Indexed: 08/21/2024]
Abstract
Idiopathic pulmonary fibrosis (IPF) is an irreversible progressive interstitial lung disease of unknown cause. The poorly understood pathophysiology of IPF poses substantial challenges to the development of effective anti-lung fibrotic drugs. The NLRP3 inflammasome, a key component of the innate immune system, has recently been linked to the pathogenesis of lung fibrosis. However, the specific contributions of NLRP3 inflammasomes to determination of the pro-fibrotic phenotype of lung fibroblasts, which play a central role in the production of extracellular matrix protein, remain to be investigated. Therefore, the present study was performed to elucidate the involvement of NLRP3 inflammasome signalling pathways in modulation of lung fibroblast proliferation and differentiation. We found that activation of NLRP3 inflammasomes increased in lung fibroblasts derived from individuals with pulmonary fibrosis and in normal lung fibroblasts stimulated with transforming growth factor β and platelet-derived growth factor. Importantly, blockage of NLRP3 inflammasome signalling, either by gene silencing of NLRP3 or using pharmacological inhibitors of NLRP3, caspase-1, or IL-1 receptor, inhibited the proliferation, differentiation, and extracellular matrix protein synthesis of activated lung fibroblasts. Moreover, induction of the reactive oxygen species/thioredoxin-interacting protein axis, an upstream signalling pathway of NLRP3 inflammasomes, was essential for maintenance of the pro-fibrotic phenotype of lung fibroblasts. Interestingly, treatments with pharmacological inhibitors of NLRP3 inflammasomes prevented the progression of bleomycin-induced pulmonary fibrosis in mice. Collectively, these findings suggest that aberrant activation of NLRP3 inflammasomes is a critical event in the pathogenesis of IPF and that targeting NLRP3 inflammasomes may serve as a therapeutic strategy for IPF.
Collapse
Affiliation(s)
- Thu-Hang Nguyen
- Department of Pharmacology, Hanoi University of Pharmacy, Hanoi, Vietnam
| | | | - Thuy-Duong Nguyen
- Department of Pharmacology, Hanoi University of Pharmacy, Hanoi, Vietnam
| | - Van Thi-Hong Tran
- Department of Pharmacology and Biochemistry, Vietnam National Institute of Medicinal Materials, Hanoi, Vietnam
| | - Hoang-Anh Nguyen
- Department of Pharmacology, Hanoi University of Pharmacy, Hanoi, Vietnam
| | - Duc-Vinh Pham
- Department of Pharmacology, Hanoi University of Pharmacy, Hanoi, Vietnam.
| |
Collapse
|
2
|
Lv S, Zhao X, Ma C, Zhao D, Sun T, Fu W, Wei Y, Li W. Advancements in the study of acute lung injury resulting from intestinal ischemia/reperfusion. Front Med (Lausanne) 2024; 11:1399744. [PMID: 38933104 PMCID: PMC11199783 DOI: 10.3389/fmed.2024.1399744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 05/31/2024] [Indexed: 06/28/2024] Open
Abstract
Intestinal ischemia/reperfusion is a prevalent pathological process that can result in intestinal dysfunction, bacterial translocation, energy metabolism disturbances, and subsequent harm to distal tissues and organs via the circulatory system. Acute lung injury frequently arises as a complication of intestinal ischemia/reperfusion, exhibiting early onset and a grim prognosis. Without appropriate preventative measures and efficacious interventions, this condition may progress to acute respiratory distress syndrome and elevate mortality rates. Nonetheless, the precise mechanisms and efficacious treatments remain elusive. This paper synthesizes recent research models and pertinent injury evaluation criteria within the realm of acute lung injury induced by intestinal ischemia/reperfusion. The objective is to investigate the roles of pathophysiological mechanisms like oxidative stress, inflammatory response, apoptosis, ferroptosis, and pyroptosis; and to assess the strengths and limitations of current therapeutic approaches for acute lung injury stemming from intestinal ischemia/reperfusion. The goal is to elucidate potential targets for enhancing recovery rates, identify suitable treatment modalities, and offer insights for translating fundamental research into clinical applications.
Collapse
Affiliation(s)
- Shihua Lv
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Xudong Zhao
- Department of Hepatopancreatobiliary, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Can Ma
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Dengming Zhao
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Tian Sun
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenchao Fu
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yuting Wei
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenzhi Li
- Key Laboratory of Anesthesia and Intensive Care Research, Harbin, China
- Department of Anesthesiology, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| |
Collapse
|
3
|
Xiao M, Zhang P, Chen Z, Liu X, Wei W, He Z, Wang Y, Cheng J, Zhu Z, Wen J, Yang H. Adenosine diphosphate ribosylation factor 6 inhibition protects burn sepsis induced lung injury through preserving vascular integrity and suppressing ASC inflammasome transmission. Burns 2024; 50:913-923. [PMID: 38267288 DOI: 10.1016/j.burns.2024.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 12/27/2023] [Accepted: 01/10/2024] [Indexed: 01/26/2024]
Abstract
BACKGROUND Severe burns are devastating injuries with significant immune dysfunction and result in substantial mortality and morbidity due to sepsis induced organ failure. Acute lung injury is the most common type of organ injury in sepsis, however, the mechanisms of which are poorly understood and effective therapeutic measures are limited. This study is aimed to investigate the effect of a small Guanosine triphosphatase (GTPase), Adenosine diphosphate ribosylation factor 6 (ARF6), on burn sepsis induced lung injury, and discuss the possible mechanisms. METHODS Burn sepsis was established in male C57BL/6 mice. Mice were anesthetised by intramuscular injection of ketamine and xylazine hydrochloride, then 30% TBSA full thickness burn followed by sub-eschar injection of lipopolysaccharide. Animals were treated with intraperitoneal injection of a small molecule inhibitor of ARF6: NAV-2729, or vehicle, right after the burn and sepsis stimuli were inflicted. Lung tissues were harvested for histopathological observation and the acute lung injury scores were calculated. Organ permeability, Vascular Endothelial Cadherin (VE-cadherin) expression, inflammatory cytokine levels and myeloperoxidase activity in lung tissues were detected. Rat pulmonary microvascular endothelial cells (PMVECs) were stimulated by burn sepsis serum with or without 10 μM NAV-2729. The ARF6 activation, VE-cadherin expression, inflammasome activity, adapter protein apoptosis speck-like protein containing a caspase recruiting domain (ASC) specks and cytokines secretion were determined. Student's t test was used for comparison between two groups. Multiple comparisons among groups were performed by using analysis of variance, with Tukey's test for the post hoc test. RESULTS NAV-2729 treatment attenuated burn sepsis induced lung injury and promoted survival of burn septic mice by preserving VE-cadherin expression in endothelial cell adherent junction and limited vascular hyperpermeability in lung tissues. Moreover, inflammatory cytokine expression and inflammatory injury in lung tissues were alleviated. Mechanistically, NAV-2729 enhanced vascular integrity by inhibiting ARF6 activation and restoring VE-cadherin expression in PMVECs. In addition, NAV-2729 inhibited ARF6-dependent phagocytosis of ASC specks, thus preventing inflammation propagation mediated by cell-to-cell transmission of ASC specks. CONCLUSIONS ARF6 inhibition preserved vascular integrity by restoring expression of VE-cadherin and suppressed the spread of inflammation by affecting phagocytosis of ASC specks, thus protected against sepsis induced lung injury and improve survival of burn septic animals. The findings of this study implied potential therapeutics by which ARF6 inhibition can protect lung function from septic induced lung injury and improve outcomes in burn sepsis.
Collapse
Affiliation(s)
- Mengjing Xiao
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Peirong Zhang
- Inpatient Ward 1, Songhe Nursing Home, 3 Yuenan Street, Huangsha Avenue, Liwan District, Guangzhou 510145, PR China.
| | - Zimiao Chen
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Xiaojie Liu
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Wei Wei
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Zhihao He
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Yao Wang
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Jian Cheng
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Zhen Zhu
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Jing Wen
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| | - Hongming Yang
- Department of Burn Plastic and Cosmetic Surgery, South China Hospital Affiliated to Shenzhen University, No. 1, Fuxin Road, Longgang District, Shenzhen 518111, PR China.
| |
Collapse
|
4
|
Zhao M, Tang F, Huang X, Ma J, Wang F, Zhang P. Polysaccharide Isolated from Agaricus blazei Murill Alleviates Intestinal Ischemia/Reperfusion Injury through Regulating Gut Microbiota and Mitigating Inflammation in Mice. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:2202-2213. [PMID: 38247134 DOI: 10.1021/acs.jafc.3c08482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Intestinal ischemia-reperfusion (I/R) injury is a serious disease in medical settings, and gut dysbiosis is a major contributor to its development. Polysaccharides from Agaricus blazei Murill (ABM) showed a range of pharmacological activities, yet no studies assessed the potential of ABM polysaccharides for alleviating intestinal I/R injury. Here, we purified a major polysaccharide (ABP1) from an ABM fruit body and subsequently tested its potential to mitigate intestinal I/R injury in a mouse model of temporary superior mesenteric artery occlusion. The results reveal that ABP1 pretreatment enhances gut barrier function via upregulation of the expression of tight junction proteins such as ZO-1 and occludin. Additionally, ABP1 intervention reduces the recruitment of neutrophils and the polarization of M1 macrophages and limits inflammation by blocking the assembly of the NLRP3 inflammasome. Moreover, the role of ABP1 in regulating the gut microbiota was confirmed via antibiotic treatment. The omics data reveals that ABP1 reprograms gut microbiota compositions, characterized by a decrease of Proteobacteria and an increase of Lachnospiraceae and Lactobacillaceae, especially the SCFA-producing genera such as Ligilactobacillus and Blautia. Overall, this work highlights the therapeutic potential of ABP1 against intestinal I/R injury, which mainly exhibits its effects via regulating the gut microbiota and suppressing the overactivated inflammation response.
Collapse
Affiliation(s)
- Meiqi Zhao
- Life and Health Intelligent Research Institute, Tianjin University of Technology, Tianjin 300384, China
- Department of Gastroenterology and Hepatology, Nankai University Affiliated Third Central Hospital, Tianjin 300170, China
| | - Fei Tang
- Department of Gastroenterology and Hepatology, Nankai University Affiliated Third Central Hospital, Tianjin 300170, China
| | - Xiaoyu Huang
- Department of Gastroenterology and Hepatology, Nankai University Affiliated Third Central Hospital, Tianjin 300170, China
| | - Jiajia Ma
- Department of Gastroenterology and Hepatology, Nankai University Affiliated Third Central Hospital, Tianjin 300170, China
| | - Fengmei Wang
- Department of Organ Transplantation, Tianjin Key Laboratory of Organ Transplantation, Tianjin First Central Hospital, Nankai University, Tianjin 300192, China
- Department of Gastroenterology and Hepatology, Tianjin First Central Hospital, Nankai University, Tianjin 300192, China
| | - Peng Zhang
- Life and Health Intelligent Research Institute, Tianjin University of Technology, Tianjin 300384, China
| |
Collapse
|
5
|
Potere N, Abbate A, Kanthi Y, Carrier M, Toldo S, Porreca E, Di Nisio M. Inflammasome Signaling, Thromboinflammation, and Venous Thromboembolism. JACC Basic Transl Sci 2023; 8:1245-1261. [PMID: 37791298 PMCID: PMC10544095 DOI: 10.1016/j.jacbts.2023.03.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 10/05/2023]
Abstract
Venous thromboembolism (VTE) remains a major health burden despite anticoagulation advances, suggesting incomplete management of pathogenic mechanisms. The NLRP3 (NACHT-, LRR- and pyrin domain-containing protein 3) inflammasome, interleukin (IL)-1, and pyroptosis are emerging contributors to the inflammatory pathogenesis of VTE. Inflammasome pathway activation occurs in patients with VTE. In preclinical models, inflammasome signaling blockade reduces venous thrombogenesis and vascular injury, suggesting that this therapeutic approach may potentially maximize anticoagulation benefits, protecting from VTE occurrence, recurrence, and ensuing post-thrombotic syndrome. The nonselective NLRP3 inhibitor colchicine and the anti-IL-1β agent canakinumab reduce atherothrombosis without increasing bleeding. Rosuvastatin reduces primary venous thrombotic events at least in part through lipid-lowering independent mechanisms, paving the way to targeted anti-inflammatory strategies in VTE. This review outlines recent preclinical and clinical evidence supporting a role for inflammasome pathway activation in venous thrombosis, and discusses the, yet unexplored, therapeutic potential of modulating inflammasome signaling to prevent and manage VTE.
Collapse
Affiliation(s)
- Nicola Potere
- Department of Medicine and Ageing Sciences, “G. d'Annunzio” University, Chieti, Italy
| | - Antonio Abbate
- Robert M. Berne Cardiovascular Research Center, Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Yogendra Kanthi
- Vascular Thrombosis & Inflammation Section, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Marc Carrier
- Department of Medicine, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Ontario, Canada
| | - Stefano Toldo
- Robert M. Berne Cardiovascular Research Center, Department of Medicine, Division of Cardiovascular Medicine, University of Virginia, Charlottesville, Virginia, USA
| | - Ettore Porreca
- Department of Innovative Technologies in Medicine and Dentistry, School of Medicine and Health Sciences, “G. d'Annunzio” University, Chieti, Italy
| | - Marcello Di Nisio
- Department of Medicine and Ageing Sciences, “G. d'Annunzio” University, Chieti, Italy
| |
Collapse
|
6
|
Barsoumian HB, He K, Hsu E, Bertolet G, Sezen D, Hu Y, Riad TS, Cortez MA, Welsh JW. NLRP3 agonist enhances radiation-induced immune priming and promotes abscopal responses in anti-PD1 resistant model. Cancer Immunol Immunother 2023; 72:3003-3012. [PMID: 37289257 PMCID: PMC10412467 DOI: 10.1007/s00262-023-03471-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 05/18/2023] [Indexed: 06/09/2023]
Abstract
Radiotherapy (XRT), a well-known activator of the inflammasome and immune priming, is in part capable of reversing resistance to anti-PD1 treatment. The NLRP3 inflammasome is a pattern recognition receptor which is activated by both exogenous and endogenous stimuli, leading to a downstream inflammatory response. Although NLRP3 is typically recognized for its role in exacerbating XRT-induced tissue damage, the NLRP3 inflammasome can also yield an effective antitumor response when used in proper dosing and sequencing with XRT. However, whether NLRP3 agonist boosts radiation-induced immune priming and promote abscopal responses in anti-PD1 resistant model is still unknown. Therefore, in this study, we paired intratumoral injection of an NLRP3 agonist with XRT to stimulate the immune system in both wild type (344SQ-P) and anti-PD1 resistant (344SQ-R) murine-implanted lung adenocarcinoma models. We found that the combination of XRT + NLPR3 agonist enhanced the control of implanted lung adenocarcinoma primary as well as secondary tumors in a radiological dose-dependent manner, in which 12Gyx3 fractions of stereotactic XRT was better than 5Gyx3, while 1Gyx2 did not improve the NLRP3 effect. Survival and tumor growth data also showed significant abscopal response with the triple therapy (12Gyx3 + NLRP3 agonist + α-PD1) in both 344SQ-P and 344SQ-R aggressively growing models. Multiple pro-inflammatory cytokines (IL-1b, IL-4, IL-12, IL-17, IFN-γ and GM-CSF) were elevated in the serum of mice treated with XRT + NLRP3 or triple therapy. The Nanostring results showed that NLRP3 agonist is capable of increasing antigen presentation, innate function, and T-cell priming. This study can be of particular importance to treat patients with immunologically-cold solid tumors whom are also refractory to prior checkpoint treatments.
Collapse
Affiliation(s)
- Hampartsoum B Barsoumian
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - Kewen He
- Department of Radiation Oncology, Shandong First Medical University and Shandong Academy of Medical Sciences, Shandong Cancer Hospital and Institute, Jinan, Shandong, China
| | - Ethan Hsu
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - Genevieve Bertolet
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - Duygu Sezen
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
- Department of Radiation Oncology, Koç University School of Medicine, Istanbul, Turkey
| | - Yun Hu
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - Thomas S Riad
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - Maria Angelica Cortez
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA
| | - James W Welsh
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, 6565 MD Anderson Blvd, Houston, TX, 77030, USA.
| |
Collapse
|
7
|
Kim SM, Jeon Y, Jang JY, Lee H. NR1D1 deficiency in the tumor microenvironment promotes lung tumor development by activating the NLRP3 inflammasome. Cell Death Discov 2023; 9:278. [PMID: 37524704 PMCID: PMC10390518 DOI: 10.1038/s41420-023-01554-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/09/2023] [Accepted: 07/12/2023] [Indexed: 08/02/2023] Open
Abstract
Nuclear receptor Rev-erbα (NR1D1) is a major negative regulator of the circadian clock. Numerous studies have investigated the role of circadian clock-related factors in the tumorigenesis of multiple cancer types, but little is known about the role of NR1D1 in cancer development. In this study, we identified the role of NR1D1 in lung tumorigenesis using genetically engineered mouse models of Nr1d1. Although NR1D1 overexpression or knockdown had little effect on the proliferation of NSCLC cells in vitro, NR1D1 deficiency in the tumor microenvironment increased lung cancer development compared with the control in the orthotopic model. NR1D1-deficient mice showed increased NACHT, LRR, and PYD domain-containing protein 3 (NLRP3) inflammasome activation, and conditioned medium (CM) from NR1D1-deficient macrophages increased the proliferation and epithelial-mesenchymal transition (EMT) of lung cancer cells. Treatment with MCC950, a specific inhibitor of NLRP3 inflammasome, blocked tumorigenesis in NR1D1-deficient mice in an orthotopic lung cancer model. In addition, MCC950 treatment blocked the increased proliferation and EMT of cancer cells induced by CM from NR1D1-deficient macrophages in vitro. Our results showed that NR1D1 in the tumor microenvironment functions as a tumor suppressor by negatively regulating the NLRP3 inflammasome, suggesting that the NLRP3 inflammasome blockade via NR1D1 activation could be a therapeutic strategy to overcome lung cancer.
Collapse
Affiliation(s)
- Sun Mi Kim
- Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi, 10408, Republic of Korea.
- Research Institute, National Cancer Center, Gyeonggi, 10408, Republic of Korea.
| | - Yoon Jeon
- Research Institute, National Cancer Center, Gyeonggi, 10408, Republic of Korea
| | - Ji Yun Jang
- Research Institute, National Cancer Center, Gyeonggi, 10408, Republic of Korea
- College of Pharmacy, Dongguk University, Seoul, 04620, Republic of Korea
| | - Ho Lee
- Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi, 10408, Republic of Korea.
- Research Institute, National Cancer Center, Gyeonggi, 10408, Republic of Korea.
| |
Collapse
|
8
|
Honda TSB, Ku J, Anders HJ. Cell type-specific roles of NLRP3, inflammasome-dependent and -independent, in host defense, sterile necroinflammation, tissue repair, and fibrosis. Front Immunol 2023; 14:1214289. [PMID: 37564649 PMCID: PMC10411525 DOI: 10.3389/fimmu.2023.1214289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/27/2023] [Indexed: 08/12/2023] Open
Abstract
The NLRP3 inflammasome transforms a wide variety of infectious and non-infectious danger signals that activate pro-inflammatory caspases, which promote the secretion of IL-1β and IL-18, and pyroptosis, a pro-inflammatory form of cell necrosis. Most published evidence documents the presence and importance of the NLRP3 inflammasome in monocytes, macrophages, and neutrophils during host defense and sterile forms of inflammation. In contrast, in numerous unbiased data sets, NLRP3 inflammasome-related transcripts are absent in non-immune cells. However, an increasing number of studies report the presence and functionality of the NLRP3 inflammasome in almost every cell type. Here, we take a closer look at the reported cell type-specific expression of the NLRP3 inflammasome components, review the reported inflammasome-dependent and -independent functions, and discuss possible explanations for this discrepancy.
Collapse
Affiliation(s)
| | | | - Hans-Joachim Anders
- Division of Nephrology, Department of Medicine IV, Ludwig-Maximilians-University Hospital Munich, Munich, Germany
| |
Collapse
|
9
|
Filler R, Yeganeh M, Li B, Lee C, Alganabi M, Hock A, Biouss G, Balsamo F, Lee D, Miyake H, Pierro A. Bovine milk-derived exosomes attenuate NLRP3 inflammasome and NF-κB signaling in the lung during neonatal necrotizing enterocolitis. Pediatr Surg Int 2023; 39:211. [PMID: 37268798 DOI: 10.1007/s00383-023-05490-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/13/2023] [Indexed: 06/04/2023]
Abstract
PURPOSE Necrotizing enterocolitis (NEC), an inflammatory intestinal disease common in premature infants, has been associated with the development of lung damage. Toll-like receptor 4 has been shown to regulate inflammation in the NEC lungs, however, other important inflammatory mechanisms have not been thoroughly investigated. In addition, we reported that milk-derived exosomes were able to attenuate intestinal injury and inflammation in experimental NEC. This study aims to (i) investigate the role of the NLRP3 inflammasome and NF-κB pathway in regulating lung damage during experimental NEC; and (ii) evaluate the therapeutic potential of bovine milk exosomes in reducing lung inflammation and injury during NEC. METHODS NEC was induced by gavage feeding of hyperosmolar formula, hypoxia, and lipopolysaccharide administration in neonatal mice from postnatal days 5-9. Exosomes were obtained by ultracentrifugation of bovine milk and administered during each formula feed. RESULTS The lung of NEC pups showed increased inflammation, tissue damage, NLRP3 inflammasome expression, and NF-κB pathway activation, which were attenuated upon exosome administration. CONCLUSION Our findings suggest that the lung undergoes significant inflammation and injury following experimental NEC which are attenuated by bovine milk-derived exosomes. This emphasizes the therapeutic potential of exosomes not just on the intestine but also on the lung.
Collapse
Affiliation(s)
- Rachel Filler
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Mina Yeganeh
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Bo Li
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Carol Lee
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Mashriq Alganabi
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Alison Hock
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - George Biouss
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Felicia Balsamo
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Dorothy Lee
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Hiromu Miyake
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada
| | - Agostino Pierro
- Division of General and Thoracic Surgery, Translational Medicine Program, The Hospital for Sick Children, Toronto, ON, Canada.
| |
Collapse
|
10
|
Signaling pathways involved in paraquat-induced pulmonary toxicity: Molecular mechanisms and potential therapeutic drugs. Int Immunopharmacol 2022; 113:109301. [DOI: 10.1016/j.intimp.2022.109301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/19/2022] [Accepted: 09/28/2022] [Indexed: 11/05/2022]
|
11
|
Li W, Yang K, Li B, Wang Y, Liu J, Chen D, Diao Y. Corilagin alleviates intestinal ischemia/reperfusion-induced intestinal and lung injury in mice via inhibiting NLRP3 inflammasome activation and pyroptosis. Front Pharmacol 2022; 13:1060104. [PMID: 36506567 PMCID: PMC9727192 DOI: 10.3389/fphar.2022.1060104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/07/2022] [Indexed: 11/24/2022] Open
Abstract
Intestinal ischemia reperfusion (II/R) is a clinical emergency that frequently occurs in a variety of clinical conditions. Severe intestinal injury results in the release of cytotoxic substances and inflammatory mediators which can activate local inflammatory response and bacterial translocation. This triggers multi-organ failure, including lung injury, which is a common complication of II/R injury and contributes to the high mortality rate. Corilagin (Cor) is a natural ellagitannin found in a variety of plants. It has many biological and pharmacological properties, including antioxidant, anti-inflammatory and anti-apoptosis activities. However, no studies have evaluated the effects and molecular mechanisms of Cor in alleviating II/R-induced intestinal and lung damage. In this study, Cor was found to significantly alleviate II/R-induced pathological damage, inflammatory response, oxidative stress, NLRP3 inflammasome activation, and pyroptosis in intestinal and lung tissues both in vivo and in vitro. Further, Cor inhibited the NLRP3 inflammasome activation and pyroptosis in RAW264.7 and MLE-12 cells induced by LPS/nigericin and that in IEC-6 cells induced by nigericin, indicating an amelioration of Cor in II/R-induced intestinal and lung injury via inhibiting NLRP3 inflammasome activation and pyroptosis. Thus, Cor might be a potential therapeutic agent for II/R-induced inflammation and tissue injury.
Collapse
Affiliation(s)
- Wenlian Li
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Kejia Yang
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Bin Li
- College of Pharmacy, Dalian Medical University, Dalian, China,Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian, China
| | - Yunxiang Wang
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Jing Liu
- College of Pharmacy, Dalian Medical University, Dalian, China,Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian, China,*Correspondence: Jing Liu, ; Yunpeng Diao,
| | - Dapeng Chen
- Comparative Medicine Department of Researching and Teaching, Dalian Medical University, Dalian, China
| | - Yunpeng Diao
- College of Pharmacy, Dalian Medical University, Dalian, China,Dalian Anti-Infective Traditional Chinese Medicine Development Engineering Technology Research Center, Dalian, China,*Correspondence: Jing Liu, ; Yunpeng Diao,
| |
Collapse
|
12
|
Ghafouri-Fard S, Shoorei H, Poornajaf Y, Hussen BM, Hajiesmaeili Y, Abak A, Taheri M, Eghbali A. NLRP3: Role in ischemia/reperfusion injuries. Front Immunol 2022; 13:926895. [PMID: 36238294 PMCID: PMC9552576 DOI: 10.3389/fimmu.2022.926895] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 09/01/2022] [Indexed: 12/05/2022] Open
Abstract
NLR family pyrin domain containing 3 (NLRP3) is expressed in immune cells, especially in dendritic cells and macrophages and acts as a constituent of the inflammasome. This protein acts as a pattern recognition receptor identifying pathogen-associated molecular patterns. In addition to recognition of pathogen-associated molecular patterns, it recognizes damage-associated molecular patterns. Triggering of NLRP3 inflammasome by molecules ATP released from injured cells results in the activation of the inflammatory cytokines IL-1β and IL-18. Abnormal activation of NLRP3 inflammasome has been demonstrated to stimulate inflammatory or metabolic diseases. Thus, NLRP3 is regarded as a proper target for decreasing activity of NLRP3 inflammasome. Recent studies have also shown abnormal activity of NLRP3 in ischemia/reperfusion (I/R) injuries. In the current review, we have focused on the role of this protein in I/R injuries in the gastrointestinal, neurovascular and cardiovascular systems.
Collapse
Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Shoorei
- Clinical Research Development Unit of Tabriz Valiasr Hospital, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Anatomical Sciences, Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Yadollah Poornajaf
- Faculty of Medicine, Birjand University of Medical Sciences, Birjand, Iran
| | - Bashdar Mahmud Hussen
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Erbil, Iraq
- Center of Research and Strategic Studies, Lebanese French University, Erbil, Iraq
| | | | - Atefe Abak
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
- *Correspondence: Mohammad Taheri, ; Ahmad Eghbali,
| | - Ahmad Eghbali
- Anesthesiology Research Center, Mofid Children Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- *Correspondence: Mohammad Taheri, ; Ahmad Eghbali,
| |
Collapse
|
13
|
Restoration of Hepatic and Intestinal Integrity by Phyllanthus amarus Is Dependent on Bax/Caspase 3 Modulation in Intestinal Ischemia-/Reperfusion-Induced Injury. Molecules 2022; 27:molecules27165073. [PMID: 36014309 PMCID: PMC9413108 DOI: 10.3390/molecules27165073] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/25/2022] [Accepted: 05/27/2022] [Indexed: 11/30/2022] Open
Abstract
Ethnopharmacological relevance: Oxidative stress is a key player in intestinal ischemia/reperfusion (I/R) injury (IIRI) with a tendency to trigger systemic inflammatory response, resulting in progressive distal organ injury. To date, the role of Bax/caspase 3 signaling in IIRI has not been reported. Furthermore, the discovery of a safe and effective drug remains pertinent in improving the outcome of IIRI. Therefore, this study investigated the role of Bax/caspase 3 signaling in intestinal I/R-induced intestinal and hepatic injury. In addition, the protective effect and possible associated mechanism of action of methanolic Phyllanthus amarus leaf extract (PA) against intestinal I/R-induced intestinal and hepatic injury were evaluated. Materials and methods: Fifty male Wistar rats were randomized into five groups (n = 10). The sham-operated group was received 0.5 mL of distilled water for seven days prior to the sham surgery, while the IIRI, febuxostat (FEB) + IIRI, low-dose PA (LDPA) + IIRI, and high-dose PA (HDPA) + IIRI groups underwent the I/R procedure. In addition to the procedure, IIRI, FEB + IIRI, LDPA + IIRI, and HDPA + IIRI received 0.5 mL of distilled water, 10 mg/kg of febuxostat, 200 mg/kg of PA, and 400 mg/kg of PA, respectively, for seven days prior to the I/R procedure. Results: Administration of methanolic Phyllanthus amarus leaf extracts attenuated the intestinal I/R-induced rise in intestinal and hepatic injury markers, malondialdehyde, nitric oxide, TNF-α, IL-6, and myeloperoxidase activities. In addition, Phyllanthus amarus ameliorated I/R-induced suppression of reduced glutathione, thiol and non-thiol proteins, and superoxide dismutase, catalase, and glutathione peroxidase activities in intestinal and hepatic tissues. These were coupled with the suppression of I/R-induced bacterial translocation, downregulation of I/R-induced activation of Bax/caspase 3 signaling, and improvement of I/R-induced distortion of intestinal and hepatic histoarchitecture by Phyllanthus amarus. Conclusion: Methanolic Phyllanthus amarus leaf extract protects against intestinal and hepatic injuries associated with intestinal I/R by suppressing oxidative-stress-mediated activation of Bax/caspase 3 signaling. The beneficial effects of Phyllanthus amarus may be ascribed to its constituent bioactive molecules, especially tannins, anthocyanin, alkaloids, and phenolics.
Collapse
|
14
|
Zhang Y, Zhang H, Li S, Huang K, Jiang L, Wang Y. Metformin Alleviates LPS-Induced Acute Lung Injury by Regulating the SIRT1/NF-κB/NLRP3 Pathway and Inhibiting Endothelial Cell Pyroptosis. Front Pharmacol 2022; 13:801337. [PMID: 35910360 PMCID: PMC9334876 DOI: 10.3389/fphar.2022.801337] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
Acute respiratory distress syndrome (ARDS), a devastating complication of numerous conditions, is often associated with high mortality. It is well known that endothelial cell (EC) damage and inflammation are vital processes in the pathogenesis of ARDS. Nevertheless, the mechanisms of EC damage are largely unknown. In the present study, we investigated the role of pyroptosis in the initiation of ARDS and demonstrated that endothelial pyroptosis might play a pivotal role in the pathophysiology of ARDS. Metformin, an antidiabetic drug, exhibited a protective effect in lipopolysaccharide (LPS)-induced lung injury, and we hypothesized that metformin alleviated LPS-induced lung injury via inhibiting ECs pyroptosis. In vivo, male ICR mice were intratracheally injected with LPS, and metformin was previously administered intraperitoneally. Morphological properties of lung tissues were detected. We showed that metformin inhibited NLRP3 inflammasome activation and NLRP3-stimulated pyroptosis induction, as shown by decreased levels of cleaved caspase-1, N-terminal fragment of GSDMD, and protein contents of IL-1β in lung tissues of mice exposed to LPS. LPS-induced expression of vascular adhesion molecules was also reduced after the treatment with metformin. In vitro, exposure of pulmonary ECs to LPS resulted in increased expression of NLRP3 and pyroptosis-associated indicators. By inhibiting the expression of NLRP3 with NLRP3 inhibitor MCC950, pyroptosis-related markers and vascular adhesion molecules were ameliorated. Moreover, metformin treatment significantly inhibited the NF-κB signaling pathway and increased the expression of sirtuin 1 (SIRT1) both in LPS-stimulated lung tissues and pulmonary ECs. Administration of the selective SIRT1 inhibitor nicotinamide significantly reversed the protective effect of metformin against endothelial pyroptosis and lung injury in LPS-treated ECs and LPS-induced acute lung injury (ALI). Thus, these findings demonstrated that metformin alleviated LPS-induced ALI by inhibiting NF-κB-NLRP3–mediated ECs pyroptosis, possibly by upregulating the expression of SIRT1.
Collapse
Affiliation(s)
| | | | | | | | - Lai Jiang
- *Correspondence: Yan Wang, ; Lai Jiang,
| | - Yan Wang
- *Correspondence: Yan Wang, ; Lai Jiang,
| |
Collapse
|
15
|
The Inflammasome NLR Family Pyrin Domain-Containing Protein 3 (NLRP3) as a Novel Therapeutic Target for Idiopathic Pulmonary Fibrosis. THE AMERICAN JOURNAL OF PATHOLOGY 2022; 192:837-846. [PMID: 35351468 DOI: 10.1016/j.ajpath.2022.03.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/01/2022] [Accepted: 03/10/2022] [Indexed: 02/06/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a dramatic disease without cure. The US Food and Drug Administration-approved drugs, pirfenidone and nintedanib, only slow disease progression. The clinical investigation of novel therapeutic approaches for IPF is an unmet clinical need. Nucleotide-binding oligomerization domain-like receptor or NOD-like receptors are pattern recognition receptors capable of binding a large variety of stress factors. NLR family pyrin domain-containing protein 3 (NLRP3), once activated, promotes IL-1β, IL-18 production, and innate immune responses. Multiple reports indicate that the inflammasome NLRP3 is overactivated in IPF patients, leading to increased production of class I IL and collagens. Similarly, data from animal models of pulmonary fibrosis confirm the role of NLRP3 in the development of chronic lung injury and pulmonary fibrosis. This report provides a review of the evidence of NLRP3 activation in IPF and of NLRP3 inhibition in different animal models of fibrosis, and highlights the recent advances in direct and indirect NLRP3 inhibitors.
Collapse
|
16
|
Zhongyin Z, Wei W, Juan X, Guohua F. Isoliquiritin apioside relieves intestinal ischemia/reperfusion-induced acute lung injury by blocking Hif-1α-mediated ferroptosis. Int Immunopharmacol 2022; 108:108852. [PMID: 35597117 DOI: 10.1016/j.intimp.2022.108852] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/06/2022] [Accepted: 05/09/2022] [Indexed: 12/12/2022]
Abstract
Isoliquiritin apioside (IA), a critical ingredient of Glycyrrhizae radix et rhizoma, has been unveiled to possess remarkable pharmacological activity against oxidative stress and inflammation. However, the potential roles of IA in intestinal ischemia/reperfusion (I/R)-induced acute lung injury (ALI) have not been reported yet. In the present study, we explored the effects of IA on I/R-induced ALI, and also clarified the possible mechanisms. To mimic intestinal I/R-induced ALI, the mice were subjected to 60 min of intestinal ischemia via clamping of the superior mesenteric artery followed by 60 min of reperfusion. IA was administered orally (20 mg/kg/day and 50 mg/kg/day) for 7 consecutive days before intestinal I/R. Lung epithelial MLE-2 cells were subjected to hypoxia for 2 h and regeneration for 3 h to mimic in vitro ALI. The results showed that IA administration prevented intestinal I/R-induced lung injury, inflammation and edema. Also, IA administration decreased the level of ferroptosis in murine lung tissues challenged with intestinal I/R. In terms of mechanism, IA administration inhibited the protein upregulation of Hif-1α and HO-1 in mice with ALI. In vitro experiments further demonstrated that IA treatment could inhibit the mRNA and protein levels of Hif-1α in hypoxia/regeneration (H/R)-induced MLE-2 cells in a concentration-dependent manner. Hif-1α stabilizer molidustat itself also significantly promoted ferroptosis of MLE-2 cells. And Hif-1α activation increased the mRNA levels of Ptgs2 and Acsl4 but decreased the mRNA level of Gpx4 in H/R-induced MLE-2 cells treated with IA. Taken together, our study unveiled IA could protect against intestinal I/R-induced ALI by decreasing lung epithelial ferroptosis in a Hif-1α-dependent manner.
Collapse
Affiliation(s)
- Zhou Zhongyin
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China
| | - Wang Wei
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, PR China
| | - Xiong Juan
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, PR China
| | - Fan Guohua
- Department of Thoracic Surgery, Renmin Hospital of Wuhan University, Wuhan 430060, PR China.
| |
Collapse
|
17
|
Escape and Over-Activation of Innate Immune Responses by SARS-CoV-2: Two Faces of a Coin. Viruses 2022; 14:v14030530. [PMID: 35336937 PMCID: PMC8951629 DOI: 10.3390/v14030530] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/01/2022] [Accepted: 03/03/2022] [Indexed: 02/06/2023] Open
Abstract
In the past 20 years, coronaviruses (CoVs), including SARS-CoV-1, MERS-CoV, and SARS-CoV-2, have rapidly evolved and emerged in the human population. The innate immune system is the first line of defense against invading pathogens. Multiple host cellular receptors can trigger the innate immune system to eliminate invading pathogens. However, these CoVs have acquired strategies to evade innate immune responses by avoiding recognition by host sensors, leading to impaired interferon (IFN) production and antagonizing of the IFN signaling pathways. In contrast, the dysregulated induction of inflammasomes, leading to uncontrolled production of IL-1 family cytokines (IL-1β and IL-18) and pyroptosis, has been associated with COVID-19 pathogenesis. This review summarizes innate immune evasion strategies employed by SARS-CoV-1 and MERS-CoV in brief and SARS-CoV-2 in more detail. In addition, we outline potential mechanisms of inflammasome activation and evasion and their impact on disease prognosis.
Collapse
|
18
|
Zhan Y, Ling Y, Deng Q, Qiu Y, Shen J, Lai H, Chen Z, Huang C, Liang L, Li X, Wu J, Huang W, Wen S. HMGB1-Mediated Neutrophil Extracellular Trap Formation Exacerbates Intestinal Ischemia/Reperfusion-Induced Acute Lung Injury. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:968-978. [PMID: 35063996 DOI: 10.4049/jimmunol.2100593] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 12/07/2021] [Indexed: 12/13/2022]
Abstract
Influx of activated neutrophils into the lungs is the histopathologic hallmark of acute lung injury (ALI) after intestinal ischemia/reperfusion (I/R). Neutrophils can release DNA and granular proteins to form cytotoxic neutrophil extracellular traps (NETs), which promotes bystander tissue injury. However, whether NETs are responsible for the remote ALI after intestinal I/R and the mechanisms underlying the dissemination of harmful gut-derived mediators to the lungs are unknown. In the C57BL/6J mouse intestinal I/R model, DNase I-mediated degradation and protein arginine deiminase 4 (PAD4) inhibitor-mediated inhibition of NET treatments reduced NET formation, tissue inflammation, and pathological injury in the lung. High-mobility group protein B1 (HMGB1) blocking prevented NET formation and protected against tissue inflammation, as well as reduced cell apoptosis and improved survival rate. Moreover, recombinant human HMGB1 administration further drives NETs and concurrent tissue toxic injury, which in turn can be reversed by neutrophil deletion via anti-Ly6G Ab i.p. injection. Furthermore, global MyD88 deficiency regulated NET formation and alleviated the development of ALI induced by intestinal I/R. Thus, HMGB1 released from necroptotic enterocytes caused ALI after intestinal I/R by inducing NET formation. Targeting NETosis and the HMGB1 pathway might extend effective therapeutic strategies to minimize intestinal I/R-induced ALI.
Collapse
Affiliation(s)
- YaQing Zhan
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - YiHong Ling
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.,Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Qiwen Deng
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - YuXin Qiu
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - JianTong Shen
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - HanJin Lai
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - ZhaoRong Chen
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - ChanYan Huang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - LiQun Liang
- Department of Critical Care Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; and
| | - Xiang Li
- Department of Anesthesiology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - JianFeng Wu
- Department of Critical Care Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China; and
| | - WenQi Huang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China;
| | - ShiHong Wen
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China;
| |
Collapse
|
19
|
[Dexmedetomidine preconditioning alleviates acute lung injury induced by intestinal ischemia-reperfusion in rats by inhibiting NLRP3 inflammasome activation]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2021; 41:1857-1863. [PMID: 35012919 PMCID: PMC8752431 DOI: 10.12122/j.issn.1673-4254.2021.12.15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To investigate the protective effect of dexmedetomidine (Dex) against acute lung injury induced by intestinal ischemia-reperfusion (II/R) in rats and its effect on NLRP3 inflammasome activity. METHODS Thirty-two normal male SD rats were randomly divided into 4 groups (n=8): the sham operation group, where the superior mesenteric artery (SMA) was exposed only; II/R group, where the SMA was occluded for 1 h followed by reperfusion for 2 h; Dex+II/R group, where the rats were subjected to II/R and received intraperitoneal injection of Dex before reperfusion; and Dex group, where the rats received Dex pretreatment and sham operation. The rats in sham operation group and II/R group received intraperitoneal injection of normal saline. The wet/dry weight ratio (W/D) and myeloperoxidase (MPO) activity in the lung tissues were measured, and HE staining was used to evaluate lung pathologies and determine lung injury score of the rats. The levels of inflammatory cytokines (TNF-α, IL-18, and IL-1β) in the lung tissue were detected using ELISA, and the expressions of NLRP3, ASC, caspase-1 and p-AMPK proteins were determined with Western blotting. RESULTS Compared with the sham-operated rats, the rats with II/R injury showed obvious lung pathologies and significantly increased W/D value, MPO activity and expression of TNF-α, IL-18 and IL-1β in the lung tissue (P < 0.05) with also significantly increased expressions of NLRP3, ASC, and caspase-1 proteins (P < 0.05) but obviously lowered expression of p-AMPK protein (P < 0.05) in the lung tissues. Compared with those in II/R group, the rats in Dex+II/R group showed milder lung pathologies, significantly reduced W/D value, MPO activity and expressions of TNF-α, IL-18 and IL-1β in the lung tissue (P < 0.05), and significant lower expressions of NLRP3, ASC, and caspase-1 (P < 0.05) but higher expression of p-AMPK protein (P < 0.05). CONCLUSION Dex treatment reduces II/R-induced inflammatory response by inhibiting the activation of NLRP3 inflammasomes, thereby improving acute lung injury caused by II/R in rats.
Collapse
|
20
|
Abstract
The COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), results in life-threatening disease in a minority of patients, especially elderly people and those with co-morbidities such as obesity and diabetes. Severe disease is characterized by dysregulated cytokine release, pneumonia and acute lung injury, which can rapidly progress to acute respiratory distress syndrome, disseminated intravascular coagulation, multisystem failure and death. However, a mechanistic understanding of COVID-19 progression remains unclear. Here we review evidence that SARS-CoV-2 directly or indirectly activates inflammasomes, which are large multiprotein assemblies that are broadly responsive to pathogen-associated and stress-associated cellular insults, leading to secretion of the pleiotropic IL-1 family cytokines (IL-1β and IL-18), and pyroptosis, an inflammatory form of cell death. We further discuss potential mechanisms of inflammasome activation and clinical efforts currently under way to suppress inflammation to prevent or ameliorate severe COVID-19.
Collapse
Affiliation(s)
- Setu M Vora
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Judy Lieberman
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.
- Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
| | - Hao Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.
| |
Collapse
|
21
|
Sesamin Protects against and Ameliorates Rat Intestinal Ischemia/Reperfusion Injury with Involvement of Activating Nrf2/HO-1/NQO1 Signaling Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:5147069. [PMID: 34630849 PMCID: PMC8494576 DOI: 10.1155/2021/5147069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 08/06/2021] [Accepted: 08/11/2021] [Indexed: 02/06/2023]
Abstract
Intestinal ischemia-reperfusion (I/R) may induce cell/tissue injuries, leading to multiple organ failure. Based on our preexperiments, we proposed that sesamin could protect against and ameliorate intestinal I/R injuries and related disorders with involvement of activating Nrf2 signaling pathway. This proposal was evaluated using SD intestinal I/R injury rats in vivo and hypoxia/reoxygenation- (H/R-) injured rat small intestinal crypt epithelial cell line (IEC-6 cells) in vitro. Sesamin significantly alleviated I/R-induced intestinal histopathological injuries and significantly reduced serum biochemical indicators ALT and AST, alleviating I/R-induced intestinal injury in rats. Sesamin also significantly reversed I/R-increased TNF-α, IL-6, IL-1β, and MPO activity in serum and MDA in tissues and I/R-decreased GSH in tissues and SOD in both tissues and IEC-6 cells, indicating its anti-inflammatory and antioxidative stress effects. Further, sesamin significantly decreased TUNEL-positive cells, downregulated the increased Bax and caspase-3 protein expression, upregulated the decreased protein expression of Bcl-2 in I/R-injured intestinal tissues, and significantly reversed H/R-reduced IEC-6 cell viability as well as reduced the number of apoptotic cells among H/R-injured IEC-6 cell, showing antiapoptotic effects. Activation of Nrf2 is known to ameliorate tissue/cell injuries. Consistent with sesamin-induced ameliorations of both intestinal I/R injuries and H/R injuries, transfection of Nrf2 cDNA significantly upregulated the expression of Nrf2, HO-1, and NQO1, respectively. On the contrary, either Nrf2 inhibitor (ML385) or Nrf2 siRNA transfection significantly decreased the expression of these proteins. Our results suggest that activation of the Nrf2/HO-1/NQO1 signaling pathway is involved in sesamin-induced anti-inflammatory, antioxidative, and antiapoptotic effects in protection against and amelioration of intestinal I/R injuries.
Collapse
|
22
|
Fu Z, Jiang Z, Guo G, Liao X, Liu M, Xiong Z. rhKGF-2 Attenuates Smoke Inhalation Lung Injury of Rats via Activating PI3K/Akt/Nrf2 and Repressing FoxO1-NLRP3 Inflammasome. Front Pharmacol 2021; 12:641308. [PMID: 34366838 PMCID: PMC8339412 DOI: 10.3389/fphar.2021.641308] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 07/05/2021] [Indexed: 12/26/2022] Open
Abstract
Smoke inhalation injury is an acute pathological change caused by thermal stimulation or toxic substance absorption through respiratory epithelial cells. This study aims to probe the protective effect and mechanism of recombinant human keratinocyte growth factor 2 (rhKGF-2) against smoke inhalation-induced lung injury (SILI) in rats. The SILI was induced in rats using a smoke exposure model, which were then treated with rhKGF-2. The rat blood was collected for blood-gas analysis, and the levels of inflammatory factors and oxidative stress markers in the plasma were measured. The rat lung tissues were collected. The pathological changes and cell apoptosis were determined by hematoxylin-eosin (HE) staining and TdT-mediated dUTP nick end labeling (TUNEL) assay, and the PI3K/Akt/Nrf2/HO-1/NQO1, and FoxO1-NLRP3 inflammasome expression were verified by western blot (WB). Both of the human alveolar epithelial cell (HPAEpiC) and primary rat alveolar epithelial cell were exposed to lipopolysaccharide (LPS) for making in-vitro alveolar epithelial cell injury model. After treatment with rhKGF-2, GSK2126458 (PI3K inhibitor) and AS1842856 (FoxO1 inhibitor), the cell viability, apoptosis, inflammation, oxidative stress, reactive oxygen species (ROS), PI3K/Akt/Nrf2, HO-1/NQO1, and FoxO1-NLRP3 in HPAEpiC and primary rat alveolar epithelial cell were examined. The data suggested that rhKGF-2 reduced LPS-induced HPAEpiC cell and primary rat alveolar epithelial cell apoptosis and the expression of inflammatory factors and oxidative stress factors. Moreover, rhKGF-2 improved the blood gas and alleviated SILI-induced lung histopathological injury in vivo via repressing inflammation, NLRP3 inflammasome activation and oxidative stress. Mechanistically, rhKGF-2 activated PI3K/Akt pathway, enhanced Nrf2/HO-1/NQO1 expression, and attenuated FoxO1-NLRP3 inflammasome both in vitro and in vivo. However, pharmaceutical inhibition of PI3K/Akt pathway attenuated rhKGF-2-mediated protective effects against SILI, while suppressing FoxO1 promoted rhKGF-2-mediated protective effects. Taken together, this study demonstrated that rhKGF-2 mitigated SILI by regulating the PI3K/Akt/Nrf2 pathway and the FoxO1-NLRP3 axis, which provides new reference in treating SILI.
Collapse
Affiliation(s)
- Zhonghua Fu
- Department of Burn, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhengying Jiang
- Department of Burn, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Guanghua Guo
- Department of Burn, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xincheng Liao
- Department of Burn, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Mingzhuo Liu
- Department of Burn, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhenfang Xiong
- Department of Pathology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| |
Collapse
|
23
|
Cellular Signal Transduction Pathways Involved in Acute Lung Injury Induced by Intestinal Ischemia-Reperfusion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:9985701. [PMID: 34188755 PMCID: PMC8195661 DOI: 10.1155/2021/9985701] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 05/14/2021] [Indexed: 01/13/2023]
Abstract
Intestinal ischemia-reperfusion (II/R) injury is a common type of tissue and organ injury, secondary to intestinal and mesenteric vascular diseases. II/R is characterized by a high incidence rate and mortality. In the II/R process, intestinal barrier function is impaired and bacterial translocation leads to excessive reactive oxygen species, inflammatory cytokine release, and even apoptosis. A large number of inflammatory mediators and oxidative factors are released into the circulation, leading to severe systemic inflammation and multiple organ failure of the lung, liver, and kidney. Acute lung injury (ALI) is the most common complication, which gradually develops into acute respiratory distress syndrome and is the main cause of its high mortality. This review summarizes the signal transduction pathways and key molecules in the pathophysiological process of ALI induced by II/R injury and provides a new therapeutic basis for further exploration of the molecular mechanisms of ALI induced by II/R injury. In particular, this article will focus on the biomarkers involved in II/R-induced ALI.
Collapse
|
24
|
Sommer N, Pak O, Hecker M. New Avenues for Anti-inflammatory Signaling of Nur77 in Acute Lung Injury. Am J Respir Cell Mol Biol 2021; 65:236-237. [PMID: 34086527 PMCID: PMC8485992 DOI: 10.1165/rcmb.2021-0210ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Natascha Sommer
- Justus Liebig University, Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany
| | - Oleg Pak
- Justus Liebig Universitat Giessen, 9175, Excellence Cluster Cardiopulmonary System University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany
| | - Matthias Hecker
- Justus Liebig University, Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany;
| |
Collapse
|
25
|
Wang H, Wang S, Huang S. MiR-494-3p alleviates acute lung injury through regulating NLRP3 activation by targeting CMPK2. Biochem Cell Biol 2021; 99:286-295. [PMID: 34037470 DOI: 10.1139/bcb-2020-0243] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Acute lung injury (ALI) is a severe respiratory disorder with a high rate of mortality, and is characterized by excessive cell apoptosis and inflammation. MicroRNAs (miRNAs) play pivotal roles in ALI. This study examined the biological function of miR-494-3p in cell apoptosis and inflammatory response in ALI. For this, mice were injected with lipopolysaccharide (LPS) to generate an in-vivo model of ALI (ALI mice), and WI-38 cells were stimulated with lipopolysaccharide (LPS) to generate an in-vitro model of ALI. We found that miR-494-3p was significantly downregulated in the ALI mice and in the in-vitro model. Overexpression of miR-494-3p inhibited inflammation and cell apoptosis in the LPS-induced WI-38 cells, and improved the symptoms of lung injury in the ALI mice. We then identified cytidine/uridine monophosphate kinase 2 (CMPK2) as a novel target of miR-494-3p in the WI-38 cells. Furthermore, miR-494-3p suppressed cell apoptosis and the inflammatory response in LPS-treated WI-38 cells through targeting CMPK2. The NLRP3 inflammasome is reportedly responsible for the activation of inflammatory processes. In our study, CMPK2 was confirmed to activate the NLRP3 inflammasome in LPS-treated WI-38 cells. In conclusion, miR-494-3p attenuates ALI through inhibiting cell apoptosis and the inflammatory response by targeting CMPK2, which suggests the value of miR-494-3p as a target for the treatment for ALI.
Collapse
Affiliation(s)
- Hong Wang
- Operating Room, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
| | - Shuqin Wang
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
| | - Shanshan Huang
- Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan 250012, Shandong, China
| |
Collapse
|
26
|
Ding R, Sun X, Yi B, Liu W, Kazama K, Xu X, Deshpande D, Liang C, Sun J. Nur77 Attenuates Inflammasome Activation by Inhibiting Caspase-1 Expression in Pulmonary Vascular Endothelial Cells. Am J Respir Cell Mol Biol 2021; 65:288-299. [PMID: 33971110 DOI: 10.1165/rcmb.2020-0524oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Inflammasomes are intracellular multiprotein complexes that help trigger and maintain the inflammatory response as part of the innate immune system. Recently, it has been increasingly recognized that aberrant inflammasome activation is critically involved endothelial dysfunction in a variety of human diseases, such as atherosclerosis, acute lung injury (ALI), and type 2 diabetes. The molecular mechanisms underlying endothelial inflammasome activation, however, are not completely elucidated. In the present study, we identified orphan nuclear receptor Nur77 as a novel regulator in controlling inflammasome activation in vascular endothelial cells (ECs). We demonstrated that LPS-induced inflammasome activation was significantly inhibited by ectopic overexpression of Nur77, predominantly through transcriptionally suppression of caspase-1 expression in vascular ECs. Consistent with this observation, we found that LPS-induced inflammasome activation was significantly augmented in lung ECs isolated from Nur77 knockout (KO) mice. Mechanistically, we showed that Nur77-induced inhibition of caspase-1 expression was due to an inhibition of Interferon Regulatory Factor 1 (IRF1) expression and its subsequent binding to the caspase-1 promoter. Importantly, in a mouse model of LPS-induced acute lung injury (ALI), Nur77 KO led to a marked activation of caspase-1 in the lung, increased alveolar and circulating IL-1β levels, and exacerbated ALI, all of which were substantially inhibited by administration of caspase-1 inhibitor. Together, our results support an important role for Nur77 in controlling inflammasome activation in vascular ECs and suggest that Nur77 could be a novel therapeutic target for the treatment of human diseases associated with aberrant inflammasome activation, such as ALI and atherosclerosis.
Collapse
Affiliation(s)
- Ru Ding
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States
| | - Xiaobo Sun
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States
| | - Bing Yi
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States
| | - Wennan Liu
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States
| | - Kyosuke Kazama
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States
| | - Xinyun Xu
- Changzheng Hospital, 56652, Shanghai, China
| | - Deepak Deshpande
- Thomas Jefferson University, 6559, Center for Translational Medicine, Philadelphia, Pennsylvania, United States
| | - Chun Liang
- Changzheng Hospital, 56652, Shanghai, China
| | - Jianxin Sun
- Thomas Jefferson University, 6559, Philadelphia, Pennsylvania, United States;
| |
Collapse
|
27
|
Li X, Huang R, Liu K, Li M, Luo H, Cui L, Huang L, Luo L. Fucoxanthin attenuates LPS-induced acute lung injury via inhibition of the TLR4/MyD88 signaling axis. Aging (Albany NY) 2020; 13:2655-2667. [PMID: 33323555 PMCID: PMC7880391 DOI: 10.18632/aging.202309] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 10/01/2020] [Indexed: 01/08/2023]
Abstract
Acute lung injury (ALI) is a critical clinical condition with a high mortality rate. It is believed that the inflammatory storm is a critical contributor to the occurrence of ALI. Fucoxanthin is a natural extract from marine seaweed with remarkable biological properties, including antioxidant, anti-tumor, and anti-obesity. However, the anti-inflammatory activity of Fucoxanthin has not been extensively studied. The current study aimed to elucidate the effects and the molecular mechanism of Fucoxanthin on lipopolysaccharide-induced acute lung injury. In this study, Fucoxanthin efficiently reduced the mRNA expression of pro-inflammatory factors, including IL-10, IL-6, iNOS, and Cox-2, and down-regulated the NF-κB signaling pathway in Raw264.7 macrophages. Furthermore, based on the network pharmacological analysis, our results showed that anti-inflammation signaling pathways were screened as fundamental action mechanisms of Fucoxanthin on ALI. Fucoxanthin also significantly ameliorated the inflammatory responses in LPS-induced ALI mice. Interestingly, our results revealed that Fucoxanthin prevented the expression of TLR4/MyD88 in Raw264.7 macrophages. We further validated Fucoxanthin binds to the TLR4 pocket using molecular docking simulations. Altogether, these results suggest that Fucoxanthin suppresses the TLR4/MyD88 signaling axis by targeting TLR4, which inhibits LPS-induced ALI, and fucoxanthin inhibition may provide a novel strategy for controlling the initiation and progression of ALI.
Collapse
Affiliation(s)
- Xiaoling Li
- Experimental Animal Center, Guangdong Medical University, Zhanjiang 524023, Guangdong, China
| | - Riming Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Kaifeng Liu
- The First Clinical College, Guangdong Medical University, Zhanjiang 524023, Guangdong, China
| | - Mingyue Li
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19126, USA
| | - Hui Luo
- The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang 524023, Guangdong, China.,Marine Medical Research Institute of Zhanjiang, Zhanjiang 524023, Guangdong, China
| | - Liao Cui
- Guangdong Key Laboratory for Research and Development of Natural Drugs, Guangdong Medical University, Zhanjiang 524023, Guangdong, China
| | - Lei Huang
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Lianxiang Luo
- The Marine Biomedical Research Institute, Guangdong Medical University, Zhanjiang 524023, Guangdong, China.,Marine Medical Research Institute of Zhanjiang, Zhanjiang 524023, Guangdong, China
| |
Collapse
|