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Zhang X, Zhang Y, Yuan S, Zhang J. The potential immunological mechanisms of sepsis. Front Immunol 2024; 15:1434688. [PMID: 39040114 PMCID: PMC11260823 DOI: 10.3389/fimmu.2024.1434688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2024] [Accepted: 06/25/2024] [Indexed: 07/24/2024] Open
Abstract
Sepsis is described as a life-threatening organ dysfunction and a heterogeneous syndrome that is a leading cause of morbidity and mortality in intensive care settings. Severe sepsis could incite an uncontrollable surge of inflammatory cytokines, and the host immune system's immunosuppression could respond to counter excessive inflammatory responses, characterized by the accumulated anti-inflammatory cytokines, impaired function of immune cells, over-proliferation of myeloid-derived suppressor cells and regulatory T cells, depletion of immune effector cells by different means of death, etc. In this review, we delve into the underlying pathological mechanisms of sepsis, emphasizing both the hyperinflammatory phase and the associated immunosuppression. We offer an in-depth exploration of the critical mechanisms underlying sepsis, spanning from individual immune cells to a holistic organ perspective, and further down to the epigenetic and metabolic reprogramming. Furthermore, we outline the strengths of artificial intelligence in analyzing extensive datasets pertaining to septic patients, showcasing how classifiers trained on various clinical data sources can identify distinct sepsis phenotypes and thus to guide personalized therapy strategies for the management of sepsis. Additionally, we provide a comprehensive summary of recent, reliable biomarkers for hyperinflammatory and immunosuppressive states, facilitating more precise and expedited diagnosis of sepsis.
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Affiliation(s)
- Xinyu Zhang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yujing Zhang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shiying Yuan
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiancheng Zhang
- Department of Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Institute of Anesthesia and Critical Care Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Zhang C, Ma J, Liu C, Yan X. The protective effect of karanjin against sepsis-induced acute lung injury in mice is involved in the suppression of the TLR4 pathway. Chem Biol Drug Des 2024; 104:e14579. [PMID: 39013775 DOI: 10.1111/cbdd.14579] [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: 03/14/2024] [Revised: 06/19/2024] [Accepted: 07/02/2024] [Indexed: 07/18/2024]
Abstract
Sepsis-induced acute lung injury (ALI) is a severe complication of sepsis. Karanjin, a natural flavonoid compound, has been proved to have anti-inflammatory function, but its role in sepsis-stimulated ALI is uncertain. Herein, the effect of karanjin on sepsis-stimulated ALI was investigated. We built a mouse model of lipopolysaccharide (LPS)-stimulated ALI. The histopathological morphology of lung tissues was scrutinized by hematoxylin-eosin (H&E) staining. The lung injury score and lung wet/dry weight ratio were detected. The myeloperoxidase (MPO) activity and malondialdehyde (MDA) content were scrutinized by commercial kits. Murine alveolar lung epithelial (MLE-12) cells were treated with LPS to mimic a cellular model of ALI. The cell viability was scrutinized by the CCK-8 assay. The contents of proinflammatory cytokines were scrutinized by qRT-PCR and ELISA. The TLR4 and MyD88 contents were scrutinized by qRT-PCR and western blotting. Results showed that karanjin alleviated LPS-stimulated ALI in mice by inhibiting lung tissue lesions, edema, and oxidative stress. Moreover, karanjin inhibited LPS-stimulated inflammation and TLR4 pathway activation in mice. However, treatment with GSK1795091, an agonist of TLR4, attenuated the effects of karanjin on LPS-induced ALI. Furthermore, karanjin repressed LPS-stimulated inflammatory response and TLR4 pathway activation in MLE-12 cells. Overexpression of TLR4 attenuated karanjin effects on LPS-stimulated inflammatory responses in MLE-12 cells. In conclusion, karanjin repressed sepsis-stimulated ALI in mice by suppressing the TLR4 pathway.
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Affiliation(s)
- Chujie Zhang
- Department of Emergency, Huai'an Second People's Hospital, The Affliated Huai'an Hospital of Xuzhou Medical University, Huai'an, China
| | - Juncong Ma
- Department of Emergency, Lianshui County People's Hospital, Huai'an, China
| | - Chang Liu
- Department of Emergency, Huai'an Second People's Hospital, The Affliated Huai'an Hospital of Xuzhou Medical University, Huai'an, China
| | - Xianliang Yan
- Department of Emergency, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
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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.
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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
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Xie Y, Lu Z, Styles IK, Reddiar SB, Phillips ARJ, Windsor JA, Porter CJH, Han S, Trevaskis NL. Lymphatic Uptake of a Highly Lipophilic Protease Inhibitor Prodrug from a Lipid-Based Formulation is Limited by Instability in the Intestine. J Pharm Sci 2024:S0022-3549(24)00128-X. [PMID: 38582284 DOI: 10.1016/j.xphs.2024.03.029] [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: 02/09/2024] [Revised: 03/31/2024] [Accepted: 03/31/2024] [Indexed: 04/08/2024]
Abstract
Dabigatran etexilate (DABE) is a lipophilic double alkyl ester prodrug of dabigatran (DAB) which is a serine protease inhibitor used clinically as an anticoagulant. Recently, translocation of serine protease enzymes, including trypsin, from the gut into the mesenteric lymph and then blood has been associated with organ failure in acute and critical illnesses (ACIs). Delivery of DABE into mesenteric lymph may thus be an effective strategy to prevent organ failure in ACIs. Most drugs access the mesenteric lymph in low quantities following oral administration, as they are rapidly transported away from the intestine via the blood. Here, we examine the potential to deliver DABE into the mesenteric lymph by promoting association with lymph lipid transport pathways via co-administration with a lipid-based formulation (LBF). A series of self-emulsifying LBFs were designed and tested in vitro for their potential to form stable DABE loaded emulsions and keep DABE solubilised and stable over time in simulated gastrointestinal conditions. The LBFs were found to form fine emulsions with a droplet size of 214 ± 30 nm and DABE was stable in the formulation. The stability of DABE in vitro in simulated intestinal conditions, plasma and lymph samples was also evaluated to ensure stability in collected samples and to evaluate whether the prodrug is likely to release active DAB. Ultimately, a highly uniform and stable self-emulsifying Type III A LBF of DABE was chosen for progression into in vivo studies in male Sprague Dawley rats to confirm the lymphatic uptake and plasma pharmacokinetics. Both in vitro and in vivo in plasma and lymph, DABE was rapidly converted to an intermediate and DAB. The main species present in vivo in both plasma and lymph was DAB and mass transport of DABE and DAB in lymph was minimal (∼0.5 % of dose). Importantly, the concentration of DABE in lymph was substantially (20-176 fold) higher than in plasma, supporting that if the prodrug were stable and did not convert to DAB in the intestine, it would be lymphatically transported. Future studies will therefore focus on optimizing the design of the prodrug and formulation to improve stability during absorption and further promote lymphatic uptake.
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Affiliation(s)
- Yining Xie
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Zijun Lu
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Ian K Styles
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Sanjeevini Babu Reddiar
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | | | - John A Windsor
- Department of Surgery, The University of Auckland, Auckland, New Zealand
| | - Christopher J H Porter
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Sifei Han
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia
| | - Natalie L Trevaskis
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC, Australia.
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Li Y, Xu HL, Kang XW, Xu S, Mou ZF. MiR-2113 overexpression attenuates sepsis-induced acute pulmonary dysfunction, inflammation and fibrosis by inhibition of HMGB1. Heliyon 2024; 10:e22772. [PMID: 38298668 PMCID: PMC10828656 DOI: 10.1016/j.heliyon.2023.e22772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 10/13/2023] [Accepted: 11/19/2023] [Indexed: 02/02/2024] Open
Abstract
Purpose Sepsis-induced acute lung injury is related to high mortality. MiR-2113 possesses important functions in human diseases. This research aimed to clarify the role and mechanism of miR-2113 in sepsis-induced acute lung injury. Methods The expression of miR-2113 in lipopolysaccharide (LPS)-induced MLE-12 cells, serum of sepsis patients, and cecal ligation and puncture mouse models was examined using quantitative real-time PCR. The functions of miR-2113 in LPS-treated MLE-12 cells were estimated by Cell Counting Kit-8 assay, flow cytometry, enzyme-linked immunosorbent assay, Western blot, and immunofluorescence. The influences of miR-2113 in cecal ligation and puncture-induced acute lung injury in mice were assessed by hematoxylin-eosin staining, terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end labeling assay, acute pulmonary dysfunction analysis, lactate dehydrogenase levels and total protein concentrations in bronchoalveolar lavage fluid, and Masson staining. Also, the mechanism of miR-2113 was examined using a dual-luciferase reporter assay. Results MiR-2113 expression was decreased in LPS-induced MLE-12 cells, serum of sepsis patients, and cecal ligation and puncture mouse models. miR-2113 overexpression restored LPS-reduced MLE-12 cell proliferation, but alleviated LPS-induced apoptosis and markers of inflammation and fibrosis in MLE-12 cells. Moreover, we found that miR-2113 mimic reduced LPS-induced MLE-12 cell injury by negatively regulating high-mobility group box 1. In vivo data further confirmed that miR-2113 overexpression alleviated acute pulmonary dysfunction, inflammation and fibrosis in cecal ligation and puncture-induced sepsis mice. Conclusion MiR-2113 relieved sepsis-induced acute pulmonary dysfunction, inflammation and fibrosis through decreasing high-mobility group box 1.
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Affiliation(s)
- Yong Li
- Department of Critical Care Medicine, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Hui-Ling Xu
- Department of Critical Care Medicine, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Xiu-Wen Kang
- Department of Critical Care Medicine, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Suo Xu
- Department of Emergency Medicine, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
| | - Zhi-Fang Mou
- Department of Critical Care Medicine, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu, China
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Liu Q, Guan Y, Yang X, Jiang Y, Hei F. Perioperative oxygenation impairment related to type a aortic dissection. Perfusion 2024:2676591231224997. [PMID: 38174389 DOI: 10.1177/02676591231224997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Type A aortic dissection (TAAD) is a life-threatening disease with high mortality and poor prognosis, usually treated by surgery. There are many complications in its perioperative period, one of which is oxygenation impairment (OI). As a common complication of TAAD, OI usually occurs throughout the perioperative period of TAAD and requires prolonged mechanical ventilation (MV) and other supportive measures. The purpose of this article is to review the risk factors, mechanisms, and treatments of type A aortic dissection-related oxygenation impairment (TAAD-OI) so as to improve clinicians' knowledge about it. Among risk factors, elevated body mass index (BMI), prolonged extracorporeal circulation (ECC) duration, higher inflammatory cells and stored blood transfusion stand out. A reduced occurrence of TAAD-OI can be achieved by controlling these risk factors such as suppressing inflammatory response by drugs. As for its mechanism, it is currently believed that inflammatory signaling pathways play a major role in this process, including the HMGB1/RAGE signaling pathway, gut-lung axis and macrophage, which have been gradually explored and are expected to provide evidences revealing the specific mechanism of TAAD-OI. Numerous treatments have been investigated for TAAD-OI, such as nitric oxide (NO), continuous pulmonary perfusion/inflation, ulinastatin and sivelestat sodium, immunomodulation intervention and mechanical support. However, these measures are all aimed at postoperative TAAD-OI, and not all of the therapies have shown satisfactory effects. Treatments for preoperative TAAD-OI are not currently available because it is difficult to correct OI without correcting the dissection. Therefore, the best solution for preoperative TAAD-OI is to operate as soon as possible. At present, there is no specific method for clinical application, and it relies more on the experience of clinicians or learns from treatments of other diseases related to oxygenation disorders. More efforts should be made to understand its pathogenesis to better improve its treatments in the future.
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Affiliation(s)
- Qindong Liu
- Department of Cardiopulmonary Bypass, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yulong Guan
- Department of Cardiopulmonary Bypass, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiaofang Yang
- Department of Extracorporeal Circulation and Mechanical Circulation Assistants, Center for Cardiac Intensive Care, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Yu Jiang
- Department of Extracorporeal Circulation and Mechanical Circulation Assistants, Center for Cardiac Intensive Care, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Feilong Hei
- Department of Extracorporeal Circulation and Mechanical Circulation Assistants, Center for Cardiac Intensive Care, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
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Wu Z, Wang Y, Lu S, Yin L, Dai L. SIRT3 alleviates sepsis-induced acute lung injury by inhibiting pyroptosis via regulating the deacetylation of FoxO3a. Pulm Pharmacol Ther 2023; 82:102244. [PMID: 37499855 DOI: 10.1016/j.pupt.2023.102244] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 07/06/2023] [Accepted: 07/24/2023] [Indexed: 07/29/2023]
Abstract
OBJECTIVE This study mainly analyzes the mechanism of SIRT3 alleviating sepsis-induced acute lung injury (ALI) by regulating the deacetylation of FoxO3a and inhibiting pyroptosis. METHODS SIRT3-overexpressing and silenced BEAS-2B cells were used to evaluate the effect of SIRT3 on apoptosis in LPS-treated lung epithelial cells. FoxO3a-silenced BEAS-2B cells were also used to verify the mechanism by which SIRT3 inhibited oxidative stress and pyroptosis in vitro in ALI. 3-TYP was used to inhibit the deacetylation function of SIRT3 in vivo. Pyroptosis was assessed by detecting GSDMD-N and LDH efflux. RESULTS In CLP-induced ALI mice, GSDMD-N and LDH levels were elevated, pyroptosis was induced. Silencing of SIRT3 exacerbated oxidative stress, NLRP3 activation and pyroptosis, and inhibited the deacetylation of FoxO3a. Overexpression of SIRT3 attenuated pyroptosis, induced deacetylation and restored the expression of FoxO3a and MnSOD. Silencing FoxO3a aggravated pyroptosis. Overexpression of SIRT3 restored the reduced FoxO3a expression and suppressed pyroptosis. 3-TYP blocked the promotion of FoxO3a by SIRT3 and the inhibitory effect of SIRT3 on pyroptosis. CONCLUSION The reduction of SIRT3 in sepsis caused hyperacetylation of FoxO3a, which in turn exacerbates oxidative stress and induces pyroptosis of ALI. Increasing the level of SIRT3 promotes FoxO3a through deacetylation, thereby inhibiting pyroptosis and relieving ALI.
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Affiliation(s)
- Zheqian Wu
- Department of Emergency, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, 200438, China
| | - Yong Wang
- Department of Emergency, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, 200438, China
| | - Shijie Lu
- Department of Emergency, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, 200438, China
| | - Lili Yin
- Department of Emergency, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, 200438, China
| | - Lihua Dai
- Department of Emergency, Shidong Hospital, Yangpu District, Shidong Hospital Affiliated to University of Shanghai for Science and Technology, Shanghai, 200438, China.
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Lv L, Cui EH, Wang B, Li LQ, Hua F, Lu HD, Chen N, Chen WY. Multiomics reveal human umbilical cord mesenchymal stem cells improving acute lung injury via the lung-gut axis. World J Stem Cells 2023; 15:908-930. [PMID: 37900940 PMCID: PMC10600741 DOI: 10.4252/wjsc.v15.i9.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/23/2023] [Accepted: 09/06/2023] [Indexed: 09/25/2023] Open
Abstract
BACKGROUND Acute lung injury (ALI) and its final severe stage, acute respiratory distress syndrome, are associated with high morbidity and mortality rates in patients due to the lack of effective specific treatments. Gut microbiota homeostasis, including that in ALI, is important for human health. Evidence suggests that the gut microbiota improves lung injury through the lung-gut axis. Human umbilical cord mesenchymal cells (HUC-MSCs) have attractive prospects for ALI treatment. This study hypothesized that HUC-MSCs improve ALI via the lung-gut microflora. AIM To explore the effects of HUC-MSCs on lipopolysaccharide (LPS)-induced ALI in mice and the involvement of the lung-gut axis in this process. METHODS C57BL/6 mice were randomly divided into four groups (18 rats per group): Sham, sham + HUC-MSCs, LPS, and LPS + HUC-MSCs. ALI was induced in mice by intraperitoneal injections of LPS (10 mg/kg). After 6 h, mice were intervened with 0.5 mL phosphate buffered saline (PBS) containing 1 × 106 HUC-MSCs by intraperitoneal injections. For the negative control, 100 mL 0.9% NaCl and 0.5 mL PBS were used. Bronchoalveolar lavage fluid (BALF) was obtained from anesthetized mice, and their blood, lungs, ileum, and feces were obtained by an aseptic technique following CO2 euthanasia. Wright's staining, enzyme-linked immunosorbent assay, hematoxylin-eosin staining, Evans blue dye leakage assay, immunohistochemistry, fluorescence in situ hybridization, western blot, 16S rDNA sequencing, and non-targeted metabolomics were used to observe the effect of HUC-MSCs on ALI mice, and the involvement of the lung-gut axis in this process was explored. One-way analysis of variance with post-hoc Tukey's test, independent-sample Student's t-test, Wilcoxon rank-sum test, and Pearson correlation analysis were used for statistical analyses. RESULTS HUC-MSCs were observed to improve pulmonary edema and lung and ileal injury, and decrease mononuclear cell and neutrophil counts, protein concentrations in BALF and inflammatory cytokine levels in the serum, lung, and ileum of ALI mice. Especially, HUC-MSCs decreased Evans blue concentration and Toll-like receptor 4, myeloid differentiation factor 88, p-nuclear factor kappa-B (NF-κB)/NF-κB, and p-inhibitor α of NF-κB (p-IκBα)/IκBα expression levels in the lung, and raised the pulmonary vascular endothelial-cadherin, zonula occludens-1 (ZO-1), and occludin levels and ileal ZO-1, claudin-1, and occludin expression levels. HUC-MSCs improved gut and BALF microbial homeostases. The number of pathogenic bacteria decreased in the BALF of ALI mice treated with HUC-MSCs. Concurrently, the abundances of Oscillospira and Coprococcus in the feces of HUS-MSC-treated ALI mice were significantly increased. In addition, Lactobacillus, Bacteroides, and unidentified_Rikenellaceae genera appeared in both feces and BALF. Moreover, this study performed metabolomic analysis on the lung tissue and identified five upregulated metabolites and 11 downregulated metabolites in the LPS + MSC group compared to the LPS group, which were related to the purine metabolism and the taste transduction signaling pathways. Therefore, an intrinsic link between lung metabolite levels and BALF flora homeostasis was established. CONCLUSION This study suggests that HUM-MSCs attenuate ALI by redefining the gut and lung microbiota.
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Affiliation(s)
- Lu Lv
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - En-Hai Cui
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China.
| | - Bin Wang
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Li-Qin Li
- Traditional Chinese Medicine Key Laboratory Cultivation Base of Zhejiang Province for the Development and Clinical Transformation of Immunomodulatory Drugs, Huzhou 313000, Zhejiang Province, China
| | - Feng Hua
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Hua-Dong Lu
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Na Chen
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
| | - Wen-Yan Chen
- Department of Respiratory and Critical Care Medicine, Huzhou Central Hospital, Affiliated Huzhou Hospital, Zhejiang University School of Medicine, Huzhou 313000, Zhejiang Province, China
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Jiang S, Wang Y, Chen L, Mu H, Meaney C, Fan Y, Pillay J, Wang H, Zhang J, Pan S, Gao C. PAI-1 genetic polymorphisms influence septic patients' outcomes by regulating neutrophil activity. Chin Med J (Engl) 2023; 136:1959-1966. [PMID: 37439338 PMCID: PMC10431590 DOI: 10.1097/cm9.0000000000002316] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Indexed: 07/14/2023] Open
Abstract
BACKGROUND Plasminogen activator inhibitor-1 (PAI-1) plays an important role in the pathophysiology of sepsis, but the exact mechanism remains debatable. In this study, we investigated the associations among the serum levels of PAI-1, the incidence of 4G/5G promoter PAI-1 gene polymorphisms, immunological indicators, and clinical outcomes in septic patients. METHODS A total of 181 patients aged 18-80 years with sepsis between November 2016 and August 2018 in the intensive care unit in the Xinhua Hospital were recruited in this retrospective study, with 28-day mortality as the primary outcome. The initial serum level of PAI-1 and the presence of rs1799768 single nucleotide polymorphisms (SNPs) were examined. Univariate logistic regression and multivariate analyses were performed to determine the factors associated with different genotypes of PAI-1, serum level of PAI-1, and 28-day mortality. RESULTS The logistic analysis suggested that a high serum level of PAI-1 was associated with the rs1799768 SNP of PAI-1 (4G/4G and 4G/5G) (Odds ratio [OR]: 2.49; 95% confidence interval [CI]: 1.09, 5.68). Furthermore, a high serum level of PAI-1 strongly influenced 28-day mortality (OR 3.36; 95% CI 1.51, 7.49). The expression and activation of neutrophils (OR 0.96; 95% CI 0.93, 0.99), as well as the changes in the expression patterns of cytokines and chemokine-associated neutrophils (OR: 1.00; 95% CI: 1.00, 1.00), were both regulated by the genotype of PAI-1. CONCLUSIONS Genetic polymorphisms of PAI-1 can influence the serum levels of PAI-1, which might contribute to mortality by affecting neutrophil activity. Thus, patients with severe sepsis might clinically benefit from enhanced neutrophil clearance and the resolution of inflammation via the regulation of PAI-1 expression and activity.
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Affiliation(s)
- Shaowei Jiang
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Yang Wang
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Liang Chen
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Honghua Mu
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Connor Meaney
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Yiwen Fan
- Department of Pathology Medicine Biology, University Medical Center Groningen, The Netherlands
| | - Janesh Pillay
- Department of Critical Care, University Medical Center Groningen, The Netherlands
| | - Hairong Wang
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Jincheng Zhang
- Department of Critical Care Medicine, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Shuming Pan
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Chengjin Gao
- Department of Emergency, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
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Abstract
PURPOSE OF REVIEW Study of organ crosstalk in critical illness has uncovered complex biological communication between different organ systems, but the role of microbiota in organ crosstalk has received limited attention. We highlight the emerging understanding of the gut-lung axis, and how the largest biomass of the human body in the gut may affect lung physiology in critical illness. RECENT FINDINGS Disruption of healthy gut microbial communities and replacement by disease-promoting pathogens (pathobiome) generates a maladaptive transmitter of messages from the gut to the lungs, connected via the portal venous and the mesenteric lymphatic systems. Gut barrier impairment allows for microbial translocation (living organisms or cellular fragments) to the lungs. Host-microbiota interactions in the gut mucosa can also impact lung physiology through microbial metabolite secretion or host-derived messengers (hormones, cytokines or immune cells). Clinical examples like the prevention of ventilator-associated pneumonia by selective decontamination of the digestive tract show that the gut-lung axis can be manipulated therapeutically. SUMMARY A growing body of evidence supports the pathophysiological relevance of the gut-lung axis, yet we are only at the brink of understanding the therapeutic and prognostic relevance of the gut microbiome, metabolites and host-microbe interactions in critical illness.
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Affiliation(s)
- Sridesh Nath
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine
| | - Georgios D Kitsios
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine
- Acute Lung Injury Center of Excellence
- Center for Medicine and the Microbiome, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Lieuwe D J Bos
- Intensive Care
- Laboratory of Experimental Intensive Care and Anesthesiology (LEICA), Amsterdam University Medical Centers, location AMC, University of Amsterdam, Amsterdam, The Netherlands
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11
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Mueen RM, Hadi NR. LUNG PROTECTIVE EFFECTS OF CLOPIDOGREL IN POLYMICROBIAL SEPSIS. POLSKI MERKURIUSZ LEKARSKI : ORGAN POLSKIEGO TOWARZYSTWA LEKARSKIEGO 2023; 51:321-329. [PMID: 37756450 DOI: 10.36740/merkur202304104] [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: 09/29/2023]
Abstract
OBJECTIVE Aim: The goal of this experiment was to examine if Clopidogrel might protect the lungs during sepsis by modulating the inflammatory and oxidative stress markers. PATIENTS AND METHODS Materials and Methods: Twenty-four adult male Swiss-albino mice aged 8-12 weeks, with a weighing of 20-30 g, were randomized into 4 equal groups (n=6): sham (Laparotomy without cecal ligation and puncture [CLP]), CLP (laparotomy plus CLP), vehicle (DMSO 1 hour prior to CLP), Clopidogrel (50 mg/g IP 1 hour before to CLP). ELISA was used to assess Lung tissue levels of pro-inflammatory and oxidative stress markers. RESULTS Results: F2 isoprostane levels were significantly higher in the sepsis group (p<0.05) in comparison with sham group, while Clopidogrel was considerably lower (p<0.05) in the inflammatory and oxidative stress markers in comparison to sepsis group. Histologically, all mice in the sepsis group had considerable (p=0.05) lung tissue damage, but Clopidogrel considerably decreased lung tissue injury (p=0.05). CONCLUSION Conclusion: Clopidogrel was found to reduce lung tissue cytokine concentrations (IL-1, TNF a, IL-6, F2 isoprostane, GPR 17, MIF) in male mice during CLP-induced polymicrobial sepsis by modulation of pro-inflammatory and oxidative stress cascade signaling pathways, to the best of our abilities, no study has looked at the effect of Clopidogrel on MIF levels.
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Affiliation(s)
- Ruaa Murtada Mueen
- DEPARTMENT OF PHARMACOLOGY & THERAPEUTICS, FACULTY OF MEDICINE, UNIVERSITY OF KUFA, KUFA, IRAQ
| | - Najah R Hadi
- DEPARTMENT OF PHARMACOLOGY & THERAPEUTICS, FACULTY OF MEDICINE, UNIVERSITY OF KUFA, KUFA, IRAQ
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12
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Alnfakh ZA, Al-Mudhafar DH, Al-Nafakh RT, Jasim AE, Hadi NR. The anti-inflammatory and antioxidant effects of Montelukast on lung sepsis in adult mice. J Med Life 2022; 15:819-827. [PMID: 35928365 PMCID: PMC9321503 DOI: 10.25122/jml-2021-0269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 02/12/2022] [Indexed: 11/13/2022] Open
Abstract
One of the most complex clinical challenges facing medical practice is sepsis-induced lung dysfunction resulting from polymicrobial sepsis. Although many therapeutic approaches have been used in such clinical challenges, there is still further need for a new effective therapeutic approach. The objective of this study was to investigate if Montelukast could protect the lungs during polymicrobial sepsis by regulating inflammatory markers and the oxidative stress pathways. Twenty-four mature male Swiss-albino mice aged 8-12 weeks, with a weight of 20-30 g, were randomized into 4 equal groups (n=6), sham (laparotomy without cecal ligation and puncture (CLP)), CLP (laparotomy with CLP), vehicle 1 (equivalent volume of DMSO 1 hour prior to CLP), Montelukast (10 mg/kg IP 1 hour prior to CLP). Lung tissue pro-inflammatory mediators IL-6, IL-1β, IL-17, LTB-4 12(S) HETE, and oxidative stress were assessed using ELISA. The levels of F2 isoprostane were considerably greater in the sepsis group (p<0.05) as compared to the sham group, while Montelukast was significantly lower (p<0.05) in these inflammatory mediators and oxidative stress as compared to the sepsis group. Histologically, the lung tissue damage was significant (p<0.05) in all mice in the sepsis group, while Montelukast significantly reduced lung tissue injury (p<0.05). The current findings indicated that Montelukast could attenuate lung dysfunction during CLP-induced polymicrobial sepsis in male mice through their modulating effects on pro-inflammatory and oxidative stress downstream signalling pathways and subsequently decrease lung tissue cytokine concentrations (IL-1β, IL-6, IL-17, LTB-4, and 12(S)HETE).
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Affiliation(s)
- Zainab Ali Alnfakh
- Department of Pharmacology & Therapeutics, Faculty of Medicine, University of Kufa, Kufa, Iraq
| | | | - Rana Talib Al-Nafakh
- Department of Pharmacology & Therapeutics, Faculty of Medicine, University of Kufa, Kufa, Iraq
| | | | - Najah Raiesh Hadi
- Department of Pharmacology & Therapeutics, Faculty of Medicine, University of Kufa, Kufa, Iraq,Corresponding Author: Najah Raiesh Hadi, Department of Pharmacology & Therapeutics, Faculty of Medicine, University of Kufa, Kufa, Iraq. E-mail:
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13
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Yang M, Ma YX, Zhi Y, Wang HB, Zhao L, Wang PS, Niu JT. Inhibitors of IFN gene stimulators (STING) improve intestinal ischemia-reperfusion-induced acute lung injury by activating AMPK signaling. Eur J Med Res 2022; 27:79. [PMID: 35642042 PMCID: PMC9153160 DOI: 10.1186/s40001-022-00703-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Acute lung injury (ALI) caused by intestinal ischemia-reperfusion is a life-threatening disease. Interferon gene stimulator (STING) is a cytoplasmic DNA sensor that participates in the initiation of the inflammatory response. This study aims to establish whether C-176 (STING inhibitor) improves ALI under intestinal ischemia-reperfusion conditions. METHODS To induce ALI, 72 male C57BL/6 mice were subjected to intestinal ischemia for 60 min and reperfusion for 3 h. Through intraperitoneal injection, C-176, a selective STING inhibitor, was injected 30 min before surgical treatment; meanwhile, compound C, an antagonist of adenosine monophosphate-activated protein kinase (AMPK), was administered 30 min after surgery. Based on immunofluorescence and Western blot assays, post-ALI assessments included lung water content (TLW), bronchoalveolar lavage fluid (BALF) protein, H&E staining, Masson staining, pulmonary pyroptosis [Gasdermin-D (GSDMD), cleaved caspase-1], and apoptosis (TUNEL, cleaved caspase-3). RESULTS C-176 administration significantly attenuated intestinal ischemia-reperfusion-mediated ALI; this effect was reflected by exacerbated TLW and BALF protein, aggravated lung injury score, elevated degree of pulmonary fibrosis, increased TUNEL- and GSDMD-positive cells, and upregulated phospho-AMPK, cleaved caspase-1, cleaved caspase-3 and IFNβ mRNA expression. Moreover, C-176 increased phospho-AMPK under ALI conditions. Nonetheless, compound C partially reversed these beneficial effects. CONCLUSION C-176, a selective STING inhibitor, improves intestinal ischemia-reperfusion-mediated ALI, and its underlying mechanism may be associated with AMPK signal activation.
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Affiliation(s)
- Mei Yang
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China.
| | - Yu-Xia Ma
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
| | - Ying Zhi
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
| | - Hai-Bin Wang
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
| | - Li Zhao
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
| | - Peng-Sheng Wang
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
| | - Jie-Ting Niu
- Department of Gerontology, Cangzhou Central Hospital, Hebei Medical University, No. 16, Xinhua West Road, Cangzhou, China
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14
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Wu YC, Hsu SP, Hu MC, Lan YT, Yeh ETH, Yang FM. PEP-sNASP Peptide Alleviates LPS-Induced Acute Lung Injury Through the TLR4/TRAF6 Axis. Front Med (Lausanne) 2022; 9:832713. [PMID: 35386914 PMCID: PMC8977741 DOI: 10.3389/fmed.2022.832713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 02/22/2022] [Indexed: 01/11/2023] Open
Abstract
Acute lung injury (ALI) is a severe inflammatory lung disease associated with macrophages. Somatic nuclear autoantigenic sperm protein (sNASP) is a negative regulator of Toll-like receptor (TLR) signaling that targets tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) in macrophages, which is required to maintain homeostasis of the innate immune response. In the present study, we generated a cell permeable PEP-sNASP peptide using the sNASP protein N-terminal domain, and examined its potential therapeutic effect in a mouse model of ALI induced by the intranasal administration of lipopolysaccharide (LPS) and elucidated the underlying molecular mechanisms in RAW 264.7 cells. In vivo, PEP-sNASP peptide treatment markedly ameliorated pathological injury, reduced the wet/dry (W/D) weight ratio of the lungs and the production of proinflammatory cytokines (interleukin (IL)-1β, IL-6, and TNF-α). In vitro, we demonstrated that when the PEP-sNASP peptide was transduced into RAW 264.7 cells, it bound to TRAF6, which markedly decreased LPS-induced proinflammatory cytokines by inhibiting TRAF6 autoubiquitination, nuclear factor (NF)-κB activation, reactive oxygen species (ROS) and cellular nitric oxide (NO) levels. Furthermore, the PEP-sNASP peptide also inhibited NLR family pyrin domain containing 3 (NLRP3) inflammasome activation. Our results therefore suggest that the PEP-sNASP may provide a potential protein therapy against oxidative stress and pulmonary inflammation via selective TRAF6 signaling.
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Affiliation(s)
- Yu-Chih Wu
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Sung-Po Hsu
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Meng-Chun Hu
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Ting Lan
- Graduate Institute of Physiology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Edward T H Yeh
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AK, United States.,Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, AK, United States
| | - Feng-Ming Yang
- School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan
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15
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Sultan M, Wilson K, Abdulla OA, Busbee PB, Hall A, Carter T, Singh N, Chatterjee S, Nagarkatti P, Nagarkatti M. Endocannabinoid Anandamide Attenuates Acute Respiratory Distress Syndrome through Modulation of Microbiome in the Gut-Lung Axis. Cells 2021; 10:3305. [PMID: 34943813 PMCID: PMC8699344 DOI: 10.3390/cells10123305] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 11/08/2021] [Accepted: 11/17/2021] [Indexed: 02/07/2023] Open
Abstract
Acute respiratory distress syndrome (ARDS) is a serious lung condition characterized by severe hypoxemia leading to limitations of oxygen needed for lung function. In this study, we investigated the effect of anandamide (AEA), an endogenous cannabinoid, on Staphylococcal enterotoxin B (SEB)-mediated ARDS in female mice. Single-cell RNA sequencing data showed that the lung epithelial cells from AEA-treated mice showed increased levels of antimicrobial peptides (AMPs) and tight junction proteins. MiSeq sequencing data on 16S RNA and LEfSe analysis demonstrated that SEB caused significant alterations in the microbiota, with increases in pathogenic bacteria in both the lungs and the gut, while treatment with AEA reversed this effect and induced beneficial bacteria. AEA treatment suppressed inflammation both in the lungs as well as gut-associated mesenteric lymph nodes (MLNs). AEA triggered several bacterial species that produced increased levels of short-chain fatty acids (SCFAs), including butyrate. Furthermore, administration of butyrate alone could attenuate SEB-mediated ARDS. Taken together, our data indicate that AEA treatment attenuates SEB-mediated ARDS by suppressing inflammation and preventing dysbiosis, both in the lungs and the gut, through the induction of AMPs, tight junction proteins, and SCFAs that stabilize the gut-lung microbial axis driving immune homeostasis.
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Affiliation(s)
- Muthanna Sultan
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Kiesha Wilson
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Osama A. Abdulla
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Philip Brandon Busbee
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Alina Hall
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Taylor Carter
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Narendra Singh
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Saurabh Chatterjee
- Environmental Health and Disease Laboratory, Arnold School of Public Health, University of South Carolina, Columbia, SC 29208, USA;
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina School of Medicine, Columbia, SC 29209, USA; (M.S.); (K.W.); (O.A.A.); (P.B.B.); (A.H.); (T.C.); (N.S.); (P.N.)
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16
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Hu M, Yang J, Xu Y. Isoorientin suppresses sepsis-induced acute lung injury in mice by activating an EPCR-dependent JAK2/STAT3 pathway. J Mol Histol 2021; 53:97-109. [PMID: 34787735 DOI: 10.1007/s10735-021-10039-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/29/2021] [Indexed: 10/19/2022]
Abstract
Sepsis is a systemic inflammatory syndrome, and acute lung injury (ALI) is one of the most common fatal complications of sepsis. Isoorientin (ISO) exerts a momentous role in the regulation of inflammation. However, whether ISO has a protective effect on sepsis-induced ALI remains unknown. This research aimed to elucidate the function of ISO on sepsis-induced ALI and its mechanism. In this study, the sepsis-induced ALI was established in the male C57BL/6 J mice. Functionally, ISO reduced the total protein concentration in BALF, lung wet/dry ratio and the numbers of neutrophils and macrophages in BALF as well as ameliorated lung injury. Besides, ISO treatment decreased the cytokine expressions and oxidative stress, and repressed the adhesion and migration of inflammatory cells induced by CLP. Mechanistically, ISO reduced the shedding of EPCR in the endothelial cell membrane; ISO treatment activated the JAK2/STAT3 signaling pathway through EPCR and the JAK2/STAT3 pathway inhibitors repressed the anti-inflammatory and antioxidant effects of ISO. In general, ISO suppressed sepsis-induced ALI in mice by activating an EPCR-dependent JAK2/STAT3 pathway.
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Affiliation(s)
- Mu Hu
- Department of Orthopaedics, Ruijin Hospital, Shanghai Jiaotong, University School of Medicine, No. 999 Xiwang Road, Jiading District, Shanghai, 201801, China.
| | - Jielai Yang
- Department of Orthopaedics, Ruijin Hospital, Shanghai Jiaotong, University School of Medicine, No. 999 Xiwang Road, Jiading District, Shanghai, 201801, China
| | - Yang Xu
- Department of Orthopaedics, Ruijin Hospital, Shanghai Jiaotong, University School of Medicine, No. 999 Xiwang Road, Jiading District, Shanghai, 201801, China
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17
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Liu X, Lin Z, Xu Y. Pellino1 promoted inflammation in lung injury model of sepsis by TRAF6/ NF-κB signal pathway. JOURNAL OF INFLAMMATION-LONDON 2021; 18:11. [PMID: 33632252 PMCID: PMC7905563 DOI: 10.1186/s12950-021-00276-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 02/08/2021] [Indexed: 12/19/2022]
Abstract
Background This study was designed to investigate the role of Pellino1 in lung injury model of sepsis and its anti-inflammation mechanism. Method: C57BL/6 male mice (6–7 weeks old) and Pellino1−/− male mice were subjected to laparotomy followed by extracorporeal cecum mobilization and ligation. THP-1 cells were treated with 500 ng/ml of LPS for 4 h. Both mRNA and protein expression of Pellino1 was increased at time dependence in lung tissue of lung injury model of sepsis mice. Knockout of Pellino1 attenuated lung injury and inhibited inflammation of sepsis mice. While Pellino1 protein enhanced lung injury and increased inflammation of sepsis mice. Pellino1 promoted inflammation in in vitro model of lung injury by TRAF6/ NF-κB signal pathway. Result TRAF6 inhibitor attenuated the effects of Pellino1 on inflammation and lung injury in mice of sepsis. Similarly, NF-κB inhibitor also suppressed the effects of Pellino1 on inflammation and lung injury in mice of sepsis. The activation of TRAF6 or induction of NF-κB attenuated the effects of Pellino1 on inflammation in in vitro model of sepsis. The inhibition of TRAF6 or suppression of NF-κB reduced the effects of Pellino1 on inflammation in in vitro model of sepsis. Conclusions These results suggested that Pellino1 promoted inflammation in lung injury model of sepsis by TRAF6/ NF-κB signal pathway.
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Affiliation(s)
- Xiaqing Liu
- Department of Children's respiratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510120, China.
| | - Zhengfang Lin
- Departmnet of Central laboratory, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510120, China
| | - Yufeng Xu
- Department of Clinical biological resource bank, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou 510120, China
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