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Zhang Y, Zou Z, Xu B, Chen B, Ge H, Ding S, Pu J. Impact of Bivalirudin on Ischemia/Reperfusion Injury in Patients with Reperfused STEMI Assessed by Cardiac Magnetic Resonance. Pharmaceuticals (Basel) 2024; 17:196. [PMID: 38399411 PMCID: PMC10893429 DOI: 10.3390/ph17020196] [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: 12/16/2023] [Revised: 01/07/2024] [Accepted: 01/11/2024] [Indexed: 02/25/2024] Open
Abstract
Thrombin is an important ischemia/reperfusion injury (IRI) mediator in patients with ST-elevation myocardial infarction (STEMI). This study examines the use of bivalirudin, a direct thrombin inhibitor, in reducing IRI in STEMI patients. STEMI patients (n = 21) were treated with bivalirudin and compared to 21 patients treated with unfractionated heparin (UFH) from the EARLY Assessment of Myocardial Tissue Characteristics by CMR in STEMI (EARLY-MYO-CMR) registry (NCT03768453). Infarct size (IS) and left ventricular ejection fraction (LVEF) were comparable between the two groups at follow up. During the first cardiac magnetic resonance (CMR) scan within the first week after percutaneous coronary intervention (PCI), all patients in both the bivalirudin and UFH groups exhibited myocardial edema. However, the myocardium edema volume was significantly less in the bivalirudin group (p < 0.05). At the one-month follow-up, a smaller proportion of patients in the bivalirudin group than in the UFH group exhibited myocardial edema (4.7% vs. 33.3%, p < 0.05). At the three-month follow-up, myocardial edema had completely resolved in the bivalirudin group, while it persisted in two patients in the UFH group. The incidence and volume of microvascular obstruction (MVO) were significantly lower in the bivalirudin group during the acute phase. Additionally, the incidence of intramyocardial hemorrhage (IMH) was significantly lower in the bivalirudin group during both the acute and follow up (p < 0.05). These findings were corroborated by T2 and T1 mapping results. The study concluded that the use of bivalirudin for anticoagulation is associated with attenuated IRI in STEMI patients who receive primary PCI.
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Affiliation(s)
- Yizhi Zhang
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
| | - Zhiguo Zou
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
| | - Bihe Xu
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
| | - Binghua Chen
- Department of Radiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China;
| | - Heng Ge
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
| | - Song Ding
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
- Department of Cardiology, Punan Branch of Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
| | - Jun Pu
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200002, China; (Y.Z.); (Z.Z.); (B.X.); (H.G.)
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Yi C, Chen F, Ma R, Fu Z, Song M, Zhang Z, Chen L, Tang X, Lu P, Li B, Zhang Q, Song Q, Zhu G, Wang W, Wang Q, Wang X. Serum level of calpains product as a novel biomarker of acute lung injury following cardiopulmonary bypass. Front Cardiovasc Med 2022; 9:1000761. [PMID: 36465445 PMCID: PMC9709320 DOI: 10.3389/fcvm.2022.1000761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/24/2022] [Indexed: 07/30/2023] Open
Abstract
OBJECTIVE The aim of this study was to test the hypothesis whether serum level of calpains could become a meaningful biomarker for diagnosis of acute lung injury (ALI) in clinical after cardiac surgery using cardiopulmonary bypass (CPB) technology. METHODS AND RESULTS Seventy consecutive adults underwent cardiac surgery with CPB were included in this prospective study. Based on the American-European Consensus Criteria (AECC), these patients were divided into ALI (n = 20, 28.57%) and non-ALI (n = 50, 71.43%) groups. Serum level of calpains in terms of calpains' activity which was expressed as relative fluorescence unit (RFU) per microliter and measured at beginning of CPB (baseline), 1 h during CPB, end of CPB as well as 1, 12, and 24 h after CPB. Difference of serum level of calpains between two groups first appeared at the end of CPB and remained different at subsequent test points. Univariate and multivariate logistic regression analysis indicated that serum level of calpains 1 h after CPB was an independent predictor for postoperative ALI (OR 1.011, 95% CI 1.001, 1.021, p = 0.033) and correlated with a lower PaO2/FiO2 ratio in the first 2 days (The first day: r = -0.389, p < 0.001 and the second day: r = -0.320, p = 0.007) as well as longer mechanical ventilation time (r = 0.440, p < 0.001), intensive care unit (ICU) length of stay (LOS) (r = 0.419, p < 0.001) and hospital LOS (r = 0.297, p = 0.013). CONCLUSION Elevated serum level of calpains correlate with impaired lung function and poor clinical outcomes, indicating serum level of calpains could act as a potential biomarker for postoperative ALI following CPB in adults. CLINICAL TRIAL REGISTRATION [https://clinicaltrials.gov/show/NCT05610475], identifier [NCT05610475].
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Affiliation(s)
- Chenlong Yi
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fangyu Chen
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
- Department of Thoracic and Cardiovascular Surgery, Dalian Medical University, Dalian, China
| | - Rongrong Ma
- Department of Anesthesiology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Zhi Fu
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Meijuan Song
- Jiangsu Provincial Key Laboratory of Geriatrics, Department of Geriatrics, The First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Zhuan Zhang
- Department of Anesthesiology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Lingdi Chen
- Department of Anesthesiology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Xing Tang
- Department of Operating Theatre, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Peng Lu
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ben Li
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Qingfen Zhang
- Department of Anesthesiology, Peking University People’s Hospital, Beijing, China
| | - Qifeng Song
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
- Department of Thoracic and Cardiovascular Surgery, Dalian Medical University, Dalian, China
| | - Guangzheng Zhu
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
- Department of Thoracic and Cardiovascular Surgery, Dalian Medical University, Dalian, China
| | - Wei Wang
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Qiang Wang
- Department of Cardiovascular Surgery, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Xiaowei Wang
- Department of Thoracic and Cardiovascular Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Lai Y, Tian Y, You X, Du J, Huang J. Effects of sphingolipid metabolism disorders on endothelial cells. Lipids Health Dis 2022; 21:101. [PMID: 36229882 PMCID: PMC9563846 DOI: 10.1186/s12944-022-01701-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/05/2022] [Indexed: 11/10/2022] Open
Abstract
Many cardiovascular disorders, including atherosclerosis, hypertension, coronary heart disease, diabetes, etc., are characterized by endothelial cell dysfunction. Endothelial cell function is closely related to sphingolipid metabolism, and normal sphingolipid metabolism is critical for maintaining endothelial cell homeostasis. Sphingolipid metabolites or key enzymes in abnormal situation, including sphingosine, ceramide (Cer), sphingosine-1-phosphate (S1P), serine, sphingosine kinase (SPHK), ceramide kinase (Cerk), sphingosine-1-phosphate lyase (S1PL) etc., may have a protective or damaging effect on the function of endothelial cells. This review summarizes the effects of sphingolipid metabolites and key enzymes disordering in sphingolipid metabolism on endothelial cells, offering some insights into further research on the pathogenesis of cardiovascular diseases and corresponding therapeutic targets.
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Affiliation(s)
- Yali Lai
- School of Traditional Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yue Tian
- School of Traditional Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Xintong You
- School of Traditional Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jiangnan Du
- School of Traditional Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jianmei Huang
- School of Traditional Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China.
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Preclinical evidence of sphingosine kinase 1 inhibition in alleviation of intestinal epithelial injury in polymicrobial sepsis. Inflamm Res 2019; 68:723-726. [PMID: 31154460 DOI: 10.1007/s00011-019-01255-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/27/2019] [Accepted: 05/28/2019] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Intestinal epithelial injury in septic patients predicts subsequent development of multiple organ failure, but its regulation by host factors remains unclear. Sphingosine kinase 1 is an enzyme-regulating inflammatory response. METHODS Cecal ligation and puncture was used to induce sepsis in C57BL/6 mice with and without N,N-dimethylsphingosine, a SphK1 inhibitor. Symptom severity was monitored by murine sepsis severity score. The intestinal barrier function was determined using 4KDa fluorescein-dextran. Bacterial load in the bloodstream was determined by 16S rRNA gene amplification. RESULTS AND CONCLUSIONS Our preliminary experimental data showed that expression of sphingosine kinase 1 in ileum was increased by sixfold in septic mice. Pharmacological blockade of sphingosine kinase 1 alleviated septic symptoms. The intestinal permeability and bacterial load in the bloodstream were also reduced in these animals. We hypothesized that inhibition of sphingosine kinase 1 may reduce pro-inflammatory cytokine production, and alleviate intestinal epithelial injury during sepsis. Further mechanistic studies and clinical specimen analyses are warranted.
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Circulating Exosomes Isolated from Septic Mice Induce Cardiovascular Hyperpermeability Through Promoting Podosome Cluster Formation. Shock 2019. [PMID: 28650928 DOI: 10.1097/shk.0000000000000928] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Septic shock increases vascular permeability, leading to multiple organ failure including cardiac dysfunction, a major contributor to septic death. Podosome, an actin-based dynamic membrane structure, plays critical roles in extracellular matrix degradation and angiogenesis. However, whether podosome contributes to endothelial barrier dysfunction during septic shock remains unknown. In this study, we found that the endothelial hyperpermeability, stimulated by phorbol 12-myristate 13-acetate and thrombin, was accompanied by increased formation of podosome clusters at the cell periphery, indicating a positive correlation between podosome clusters and endothelial leakage. Interestingly, we observed that circulating exosomes collected from septic mice were able to stimulate podosome cluster formation in cardiac endothelial cells, together with increased permeability in vitro/in vivo and cardiac dysfunction. Mechanistically, we identified that septic exosomes contained higher levels of reactive oxygen species (ROS) than normal ones, which were effectively transported to endothelial cells (ECs). Depletion of ROS in septic exosomes significantly reduced their capacity for promoting podosome cluster formation and thereby dampened vascular leakage. Finally, we elucidated that podosome cluster-induced endothelial hyperpermeability was associated with fragmentation/depletion of zonula occludens-1 (ZO-1) at the cell periphery. Our results demonstrate that septic exosomes were enriched with high amounts of ROS, which can be transported to ECs, leading to the generation of podosome clusters in target ECs and thereby, causing ZO-1 relocation, vascular leakage, and cardiac dysfunction.
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Sphingosine Kinase 1 Regulates Inflammation and Contributes to Acute Lung Injury in Pneumococcal Pneumonia via the Sphingosine-1-Phosphate Receptor 2. Crit Care Med 2018; 46:e258-e267. [DOI: 10.1097/ccm.0000000000002916] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Groschner K, Shrestha N, Fameli N. Cardiovascular and Hemostatic Disorders: SOCE in Cardiovascular Cells: Emerging Targets for Therapeutic Intervention. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 993:473-503. [PMID: 28900929 DOI: 10.1007/978-3-319-57732-6_24] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The discovery of the store-operated Ca2+ entry (SOCE) phenomenon is tightly associated with its recognition as a pathway of high (patho)physiological significance in the cardiovascular system. Early on, SOCE has been investigated primarily in non-excitable cell types, and the vascular endothelium received particular attention, while a role of SOCE in excitable cells, specifically cardiac myocytes and pacemakers, was initially ignored and remains largely enigmatic even to date. With the recent gain in knowledge on the molecular components of SOCE as well as their cellular organization within nanodomains, potential tissue/cell type-dependent heterogeneity of the SOCE machinery along with high specificity of linkage to downstream signaling pathways emerged for cardiovascular cells. The basis of precise decoding of cellular Ca2+ signals was recently uncovered to involve correct spatiotemporal organization of signaling components, and even minor disturbances in these assemblies trigger cardiovascular pathologies. With this chapter, we wish to provide an overview on current concepts of cellular organization of SOCE signaling complexes in cardiovascular cells with particular focus on the spatiotemporal aspects of coupling to downstream signaling and the potential disturbance of these mechanisms by pathogenic factors. The significance of these mechanistic concepts for the development of novel therapeutic strategies will be discussed.
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Affiliation(s)
- Klaus Groschner
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria.
| | - Niroj Shrestha
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria
| | - Nicola Fameli
- Institute of Biophysics, Medical University of Graz, Neue Stiftingtalstrasse 6/4, 8010, Graz, Austria
- Department of Anesthesiology, Pharmacology, and Therapeutics, University of British Columbia, Vancouver, BC, Canada
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Dimasi DP, Pitson SM, Bonder CS. Examining the Role of Sphingosine Kinase-2 in the Regulation of Endothelial Cell Barrier Integrity. Microcirculation 2016; 23:248-65. [DOI: 10.1111/micc.12271] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 01/25/2016] [Indexed: 12/30/2022]
Affiliation(s)
- David P. Dimasi
- Centre for Cancer Biology; University of South Australia and SA Pathology; Adelaide South Australia Australia
| | - Stuart M. Pitson
- Centre for Cancer Biology; University of South Australia and SA Pathology; Adelaide South Australia Australia
- School of Medicine; University of Adelaide; Adelaide South Australia Australia
- School of Biological Sciences; University of Adelaide; Adelaide South Australia Australia
| | - Claudine S. Bonder
- Centre for Cancer Biology; University of South Australia and SA Pathology; Adelaide South Australia Australia
- School of Medicine; University of Adelaide; Adelaide South Australia Australia
- School of Biological Sciences; University of Adelaide; Adelaide South Australia Australia
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Sun S, Sursal T, Adibnia Y, Zhao C, Zheng Y, Li H, Otterbein LE, Hauser CJ, Itagaki K. Mitochondrial DAMPs increase endothelial permeability through neutrophil dependent and independent pathways. PLoS One 2013; 8:e59989. [PMID: 23527291 PMCID: PMC3603956 DOI: 10.1371/journal.pone.0059989] [Citation(s) in RCA: 158] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 02/24/2013] [Indexed: 12/16/2022] Open
Abstract
Trauma and sepsis can cause acute lung injury (ALI) and Acute Respiratory Distress Syndrome (ARDS) in part by triggering neutrophil (PMN)-mediated increases in endothelial cell (EC) permeability. We had shown that mitochondrial (mt) damage-associated molecular patterns (DAMPs) appear in the blood after injury or shock and activate human PMN. So we now hypothesized that mitochondrial DAMPs (MTD) like mitochondrial DNA (mtDNA) and peptides might play a role in increased EC permeability during systemic inflammation and proceeded to evaluate the underlying mechanisms. MtDNA induced changes in EC permeability occurred in two phases: a brief, PMN-independent ‘spike’ in permeability was followed by a prolonged PMN-dependent increase in permeability. Fragmented mitochondria (MTD) caused PMN-independent increase in EC permeability that were abolished with protease treatment. Exposure to mtDNA caused PMN-EC adherence by activating expression of adherence molecule expression in both cell types. Cellular activation was manifested as an increase in PMN calcium flux and EC MAPK phosphorylation. Permeability and PMN adherence were attenuated by endosomal TLR inhibitors. EC lacked formyl peptide receptors but were nonetheless activated by mt-proteins, showing that non-formylated mt-protein DAMPs can activate EC. Mitochondrial DAMPs can be released into the circulation by many processes that cause cell injury and lead to pathologic endothelial permeability. We show here that mitochondria contain multiple DAMP motifs that can act on EC and/or PMN via multiple pathways. This can enhance PMN adherence to EC, activate PMN-EC interactions and subsequently increase systemic endothelial permeability. Mitochondrial DAMPs may be important therapeutic targets in conditions where inflammation pathologically increases endothelial permeability.
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Affiliation(s)
- Shiqin Sun
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Tolga Sursal
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Yasaman Adibnia
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Cong Zhao
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Yi Zheng
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Haipeng Li
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Orthopedic Surgery, Beijing Army General Hospital, Beijing, China
| | - Leo E. Otterbein
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
| | - Carl J. Hauser
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (KI) (CH); (CJH)
| | - Kiyoshi Itagaki
- Department of Surgery, Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, Massachusetts, United States of America
- * E-mail: (KI) (CH); (CJH)
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Davidson BA, Vethanayagam RR, Grimm MJ, Mullan BA, Raghavendran K, Blackwell TS, Freeman ML, Ayyasamy V, Singh KK, Sporn MB, Itagaki K, Hauser CJ, Knight PR, Segal BH. NADPH oxidase and Nrf2 regulate gastric aspiration-induced inflammation and acute lung injury. THE JOURNAL OF IMMUNOLOGY 2013; 190:1714-24. [PMID: 23296708 DOI: 10.4049/jimmunol.1202410] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Recruitment of neutrophils and release of reactive oxygen species are considered to be major pathogenic components driving acute lung injury (ALI). However, NADPH oxidase, the major source of reactive oxygen species in activated phagocytes, can paradoxically limit inflammation and injury. We hypothesized that NADPH oxidase protects against ALI by limiting neutrophilic inflammation and activating Nrf2, a transcriptional factor that induces antioxidative and cytoprotective pathways. Our objective was to delineate the roles of NADPH oxidase and Nrf2 in modulating acute lung inflammation and injury in clinically relevant models of acute gastric aspiration injury, a major cause of ALI. Acid aspiration caused increased ALI (as assessed by bronchoalveolar lavage fluid albumin concentration) in both NADPH oxidase-deficient mice and Nrf2(-/-) mice compared with wild-type mice. NADPH oxidase reduced airway neutrophil accumulation, but Nrf2 decreased ALI without affecting neutrophil recovery. Acid injury resulted in a 120-fold increase in mitochondrial DNA, a proinflammatory and injurious product of cellular necrosis, in cell-free bronchoalveolar lavage fluid. Pharmacologic activation of Nrf2 by the triterpenoid 1-[2-cyano-3-,12-dioxooleana-1,9 (11)-dien-28-oyl]imidazole limited aspiration-induced ALI in wild-type mice and reduced endothelial cell injury caused by mitochondrial extract-primed human neutrophils, leading to the conclusion that NADPH oxidase and Nrf2 have coordinated, but distinct, functions in modulating inflammation and injury. These results also point to Nrf2 as a therapeutic target to limit ALI by attenuating neutrophil-induced cellular injury.
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Affiliation(s)
- Bruce A Davidson
- Department of Anesthesiology, University at Buffalo School of Medicine, Buffalo, NY 14214, USA
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Yang Y, Uhlig S. The role of sphingolipids in respiratory disease. Ther Adv Respir Dis 2011; 5:325-44. [PMID: 21900155 DOI: 10.1177/1753465811406772] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Sphingolipids form a broad class of lipids with diverse functions ranging from membrane constituents to intracellular second messengers and extracellular mediators. They can be rapidly generated or converted into each other and they play pivotal roles in various cellular processes, many of which are broadly associated with inflammation and apoptosis. Among the numerous sphingolipids, ceramide and sphingosine-1-phosphate (S1P) have received the greatest attention. Ceramide is a hydrophobic molecule that is increased in the lungs of patients with cystic fibrosis and chronic obstructive pulmonary disease (COPD). Ceramide is the eponym for ceramide-rich membrane platforms. that need to form as a prerequisite to the uptake of several microorganisms including Pseudomonas aeruginosa, and as a prerequisite to many signaling processes including apoptosis and increased vascular permeability. Accordingly, abnormal amounts of enzymes involved in the synthesis of ceramide, such as neutral or acid sphingomyelinase, are found in emphysematic smokers and in patients with severe sepsis, and are considered as novel pharmacological targets. S1P acts as an extracellular mediator that opposes several actions of ceramide and acts by binding to G-protein coupled S1P receptors (S1P(1)-S1P(5)). Of particular interest are S1P(1) receptors that enhance vascular barrier functions and are antiapoptotic. Therefore, S1P(1)-receptor ligands are suggested as novel drugs for COPD and acute lung injury. S1P is a potent chemotaxin for many leukocytes, it organizes lymphocyte trafficking and is involved in several key symptoms of asthma such as airway hyperresponsiveness and pulmonary eosinophil sequestration. S1P is formed by sphingosine kinases that have been identified as possible drug targets for the treatment of asthma. Based on these findings, several new drugs have recently been developed to specifically target sphingomyelinases, sphingosine kinases and S1P receptors for the treatment of COPD, cystic fibrosis, asthma and acute lung injury.
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Affiliation(s)
- Yang Yang
- Institute of Pharmacology and Toxicology, University Hospital Aachen, Aachen, Germany
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WHAT'S NEW IN SHOCK, APRIL 2010? Shock 2010; 33:341-3. [DOI: 10.1097/shk.0b013e3181d32ce5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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