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Murthy A, Rodriguez LR, Dimopoulos T, Bui S, Iyer S, Chavez K, Tomer Y, Abraham V, Cooper C, Renner DM, Katzen JB, Bentley ID, Ghadiali SN, Englert JA, Weiss SR, Beers MF. Activation of alveolar epithelial ER stress by β-coronavirus infection disrupts surfactant homeostasis in mice: implications for COVID-19 respiratory failure. Am J Physiol Lung Cell Mol Physiol 2024; 327:L232-L249. [PMID: 38860845 DOI: 10.1152/ajplung.00324.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 06/03/2024] [Accepted: 06/03/2024] [Indexed: 06/12/2024] Open
Abstract
COVID-19 syndrome is characterized by acute lung injury, hypoxemic respiratory failure, and high mortality. Alveolar type 2 (AT2) cells are essential for gas exchange, repair, and regeneration of distal lung epithelium. We have shown that the causative agent, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), and other members of the β-coronavirus genus induce an endoplasmic reticulum (ER) stress response in vitro; however, the consequences for host AT2 cell function in vivo are less understood. To study this, two murine models of coronavirus infection were used-mouse hepatitis virus-1 (MHV-1) in A/J mice and a mouse-adapted SARS-CoV-2 strain. MHV-1-infected mice exhibited dose-dependent weight loss with histological evidence of distal lung injury accompanied by elevated bronchoalveolar lavage fluid (BALF) cell counts and total protein. AT2 cells showed evidence of both viral infection and increased BIP/GRP78 expression, consistent with activation of the unfolded protein response (UPR). The AT2 UPR included increased inositol-requiring enzyme 1α (IRE1α) signaling and a biphasic response in PKR-like ER kinase (PERK) signaling accompanied by marked reductions in AT2 and BALF surfactant protein (SP-B and SP-C) content, increases in surfactant surface tension, and emergence of a reprogrammed epithelial cell population (Krt8+ and Cldn4+). The loss of a homeostatic AT2 cell state was attenuated by treatment with the IRE1α inhibitor OPK-711. As a proof-of-concept, C57BL6 mice infected with mouse-adapted SARS-CoV-2 demonstrated similar lung injury and evidence of disrupted surfactant homeostasis. We conclude that lung injury from β-coronavirus infection results from an aberrant host response, activating multiple AT2 UPR stress pathways, altering surfactant metabolism/function, and changing AT2 cell state, offering a mechanistic link between SARS-CoV-2 infection, AT2 cell biology, and acute respiratory failure.NEW & NOTEWORTHY COVID-19 syndrome is characterized by hypoxemic respiratory failure and high mortality. In this report, we use two murine models to show that β-coronavirus infection produces acute lung injury, which results from an aberrant host response, activating multiple epithelial endoplasmic reticular stress pathways, disrupting pulmonary surfactant metabolism and function, and forcing emergence of an aberrant epithelial transition state. Our results offer a mechanistic link between SARS-CoV-2 infection, AT2 cell biology, and respiratory failure.
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Affiliation(s)
- Aditi Murthy
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- PENN-CHOP Lung Biology Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Luis R Rodriguez
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- PENN-CHOP Lung Biology Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Thalia Dimopoulos
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Sarah Bui
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- PENN-CHOP Lung Biology Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Swati Iyer
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Katrina Chavez
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Yaniv Tomer
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Valsamma Abraham
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Charlotte Cooper
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - David M Renner
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- Penn Center for Research on Coronaviruses and Emerging Pathogens, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Jeremy B Katzen
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- PENN-CHOP Lung Biology Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Ian D Bentley
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Samir N Ghadiali
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
- Department of Biomedical Engineering, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Joshua A Englert
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio, United States
| | - Susan R Weiss
- Department of Microbiology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- Penn Center for Research on Coronaviruses and Emerging Pathogens, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Michael F Beers
- Pulmonary and Critical Care Division, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
- PENN-CHOP Lung Biology Institute, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, United States
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Chen X, Wang F, Tang J, Meng J, Han Z. Paralemmin-3 augments lipopolysaccharide-induced acute lung injury with M1 macrophage polarization via the notch signaling pathway. Respir Physiol Neurobiol 2024; 320:104203. [PMID: 38103708 DOI: 10.1016/j.resp.2023.104203] [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: 10/18/2023] [Revised: 12/03/2023] [Accepted: 12/11/2023] [Indexed: 12/19/2023]
Abstract
BACKGROUND Acute lung injury (ALI) involves severe lung damage and respiratory failure, which are accompanied by alveolar macrophage (AM) activation. The aim of this article is to verify the influence of paralemmin-3 (PALM3) on alveolar macrophage (AM) polarization in ALI and the underlying mechanism of action. METHODS An ALI rat model was established by successive lipopolysaccharide (LPS) inhalations. The influence of PALM3 on the survival rate, severity of lung injury, and macrophage polarization was analyzed. Furthermore, we explored the underlying mechanism of PALM3 in regulating macrophage polarization. RESULTS PALM3 overexpression increased mortality of ALI rats, augmented lung pathological damage, and promoted AM polarization toward M1 cells. Conversely, PALM3 knockdown had the opposite effects. Mechanistically, PALM3 might promote M1 polarization by acting as an adaptor to facilitate transduction of Notch signaling. CONCLUSION PALM3 aggravates lung injury and induces macrophage polarization toward M1 cells by activating the Notch signaling pathway in LPS-induced ALI, which may shed light on ALI/ARDS treatments.
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Affiliation(s)
- Xuxin Chen
- Department of Pulmonary and Critical Care Medicine, The Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, PR China
| | - Fan Wang
- Department of Pulmonary and Critical Care Medicine, The Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, PR China
| | - Jian Tang
- Department of Pulmonary and Critical Care Medicine, The Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, PR China
| | - Jiguang Meng
- Department of Pulmonary and Critical Care Medicine, The Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, PR China.
| | - Zhihai Han
- Department of Pulmonary and Critical Care Medicine, The Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, PR China.
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da Silva AL, Bessa CM, Rocha NN, Carvalho EB, Magalhaes RF, Capelozzi VL, Robba C, Pelosi P, Samary CS, Rocco PRM, Silva PL. Pressure-support compared with pressure-controlled ventilation mitigates lung and brain injury in experimental acute ischemic stroke in rats. Intensive Care Med Exp 2023; 11:93. [PMID: 38102452 PMCID: PMC10724101 DOI: 10.1186/s40635-023-00580-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND We aimed to evaluate the pulmonary and cerebral effects of low-tidal volume ventilation in pressure-support (PSV) and pressure-controlled (PCV) modes at two PEEP levels in acute ischemic stroke (AIS). METHODS In this randomized experimental study, AIS was induced by thermocoagulation in 30 healthy male Wistar rats. After 24 h, AIS animals were randomly assigned to PSV or PCV with VT = 6 mL/kg and PEEP = 2 cmH2O (PSV-PEEP2 and PCV-PEEP2) or PEEP = 5 cmH2O (PSV-PEEP5 and PCV-PEEP5) for 2 h. Lung mechanics, arterial blood gases, and echocardiography were evaluated before and after the experiment. Lungs and brain tissue were removed for histologic and molecular biology analysis. The primary endpoint was diffuse alveolar damage (DAD) score; secondary endpoints included brain histology and brain and lung molecular biology markers. RESULTS In lungs, DAD was lower with PSV-PEEP5 than PCV-PEEP5 (p < 0.001); interleukin (IL)-1β was lower with PSV-PEEP2 than PCV-PEEP2 (p = 0.016) and PSV-PEEP5 than PCV-PEEP5 (p = 0.046); zonula occludens-1 (ZO-1) was lower in PCV-PEEP5 than PCV-PEEP2 (p = 0.042). In brain, necrosis, hemorrhage, neuropil edema, and CD45 + microglia were lower in PSV than PCV animals at PEEP = 2 cmH2O (p = 0.036, p = 0.025, p = 0.018, p = 0.011, respectively) and PEEP = 5 cmH2O (p = 0.003, p = 0.003, p = 0.007, p = 0.003, respectively); IL-1β was lower while ZO-1 was higher in PSV-PEEP2 than PCV-PEEP2 (p = 0.009, p = 0.007, respectively), suggesting blood-brain barrier integrity. Claudin-5 was higher in PSV-PEEP2 than PSV-PEEP5 (p = 0.036). CONCLUSION In experimental AIS, PSV compared with PCV reduced lung and brain injury. Lung ZO-1 reduced in PCV with PEEP = 2 versus PEEP = 5 cmH2O, while brain claudin-5 increased in PSV with PEEP = 2 versus PEEP = 5 cmH2O.
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Affiliation(s)
- Adriana L da Silva
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Camila M Bessa
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Nazareth N Rocha
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
- Department of Physiology and Pharmacology, Biomedical Institute, Fluminense Federal University, Rio de Janeiro, Brazil
| | - Eduardo B Carvalho
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Raquel F Magalhaes
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Vera L Capelozzi
- Department of Pathology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - Chiara Robba
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
- Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Paolo Pelosi
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
- Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, Genoa, Italy
| | - Cynthia S Samary
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
- Department of Cardiorespiratory and Musculoskeletal Physiotherapy, Faculty of Physiotherapy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Pedro L Silva
- Laboratory of Pulmonary Investigation, Centro de Ciências da Saúde, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Avenida Carlos Chagas Filho, S/N, Bloco G-014, Ilha Do Fundão, Rio de Janeiro, RJ, 21941-902, Brazil.
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Mebratu YA, Soni S, Rosas L, Rojas M, Horowitz JC, Nho R. The aged extracellular matrix and the profibrotic role of senescence-associated secretory phenotype. Am J Physiol Cell Physiol 2023; 325:C565-C579. [PMID: 37486065 PMCID: PMC10511170 DOI: 10.1152/ajpcell.00124.2023] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 07/13/2023] [Accepted: 07/13/2023] [Indexed: 07/25/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is an irreversible and fatal lung disease that is primarily found in the elderly population, and several studies have demonstrated that aging is the major risk factor for IPF. IPF is characterized by the presence of apoptosis-resistant, senescent fibroblasts that generate an excessively stiff extracellular matrix (ECM). The ECM profoundly affects cellular functions and tissue homeostasis, and an aberrant ECM is closely associated with the development of lung fibrosis. Aging progressively alters ECM components and is associated with the accumulation of senescent cells that promote age-related tissue dysfunction through the expression of factors linked to a senescence-associated secretary phenotype (SASP). There is growing evidence that SASP factors affect various cell behaviors and influence ECM turnover in lung tissue through autocrine and/or paracrine signaling mechanisms. Since life expectancy is increasing worldwide, it is important to elucidate how aging affects ECM dynamics and turnover via SASP and thereby promotes lung fibrosis. In this review, we will focus on the molecular properties of SASP and its regulatory mechanisms. Furthermore, the pathophysiological process of ECM remodeling by SASP factors and the influence of an altered ECM from aged lungs on the development of lung fibrosis will be highlighted. Finally, recent attempts to target ECM alteration and senescent cells to modulate fibrosis will be introduced.NEW & NOTEWORTHY Aging is the most prominent nonmodifiable risk factor for various human diseases including Idiopathic pulmonary fibrosis. Aging progressively alters extracellular matrix components and is associated with the accumulation of senescent cells that promote age-related tissue dysfunction. In this review, we will discuss the pathological impact of aging and senescence on lung fibrosis via senescence-associated secretary phenotype factors and potential therapeutic approaches to limit the progression of lung fibrosis.
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Affiliation(s)
- Yohannes A Mebratu
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
| | - Sourabh Soni
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
| | - Lorena Rosas
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
| | - Mauricio Rojas
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
| | - Jeffrey C Horowitz
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
| | - Richard Nho
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, The Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, United States
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Gbotosho OT, Li W, Joiner CH, Brown LAS, Hyacinth HI. The inflammatory profiles of pulmonary alveolar macrophages and alveolar type 2 cells in SCD. Exp Biol Med (Maywood) 2023; 248:1013-1023. [PMID: 37012678 PMCID: PMC10581160 DOI: 10.1177/15353702231157940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Accepted: 01/15/2023] [Indexed: 04/05/2023] Open
Abstract
The lung microenvironment plays a crucial role in maintaining lung homeostasis as well as the initiation and resolution of both acute and chronic lung injury. Acute chest syndrome (ACS) is a complication of sickle cell disease (SCD) like acute lung injury. Both the endothelial cells and peripheral blood mononuclear cells are known to secrete proinflammatory cytokines elevated during ACS episodes. However, in SCD, the lung microenvironment that may favor excessive production of proinflammatory cytokines and the contribution of other lung resident cells, such as alveolar macrophages and alveolar type 2 epithelial (AT-2) cells, to ACS pathogenesis is not completely understood. Here, we sought to understand the pulmonary microenvironment and the proinflammatory profile of lung alveolar macrophages (LAMs) and AT-2 cells at steady state in Townes sickle cell (SS) mice compared to control mice (AA). In addition, we examined lung function and micromechanics molecules essential for pulmonary epithelial barrier function in these mice. Our results showed that bronchoalveolar lavage (BAL) fluid in SS mice had elevated protein levels of pro-inflammatory cytokines interleukin (IL)-1β and IL-12 (p ⩽ 0.05) compared to AA controls. We showed for the first time, significantly increased protein levels of inflammatory mediators (Human antigen R (HuR), Toll-like receptor 4 (TLR4), MyD88, and PU.1) in AT-2 cells (1.4 to 2.2-fold) and LAM (17-21%) isolated from SS mice compared to AA control mice at steady state. There were also low levels of anti-inflammatory transcription factors (Nrf2 and PPARy) in SS mice compared to AA controls (p ⩽ 0.05). Finally, we found impaired lung function and a dysregulated composition of surfactant proteins (B and C). Our results demonstrate that SS mice at steady state had a compromised lung microenvironment with elevated expression of proinflammatory cytokines by AT-2 cells and LAM, as well as dysregulated expression of surfactant proteins necessary for maintaining the alveolar barrier integrity and lung function.
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Affiliation(s)
- Oluwabukola T Gbotosho
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Wei Li
- Aflac Cancer & Blood Disorders Center of Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Clinton H Joiner
- Aflac Cancer & Blood Disorders Center of Children’s Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Lou Ann S Brown
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Hyacinth I Hyacinth
- Department of Neurology and Rehabilitation Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
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Kianmehr M, Behdadfard M, Hedayati-Moghadam M, Khazdair MR. Effects of Herbs and Derived Natural Products on Lipopolysaccharide-Induced Toxicity: A Literature Review. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:7675183. [PMID: 37102170 PMCID: PMC10125742 DOI: 10.1155/2023/7675183] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/13/2022] [Accepted: 03/17/2023] [Indexed: 04/28/2023]
Abstract
Introduction Oxidative stress (OS) during inflammation can increase inflammatory responses and damage tissue. Lipopolysaccharide (LPS) can induce oxidative stress and inflammation in several organs. Natural products have several biological activities including anti-inflammatory, antioxidant, and immunoregulatory properties. The aims of the study are to study the possible therapeutic effects of natural products on LPS inducing toxicity on the nervous system, lung, liver, and immune system. Methods The in vitro and in vivo research articles that were published in the last 5 years were included in the current study. The keywords included "lipopolysaccharide," "toxicity," "natural products," and "plant extract" were searched in different databases such as Scopus, PubMed, and Google Scholar until October 2021. Results The results of most studies indicated that some medicinal herbs and their potent natural products can help to prevent, treat, and manage LPS-induced toxicity. Medicinal herbs and plant-derived natural products showed promising effects on managing and treating oxidative stress, inflammation, and immunomodulation by several mechanisms. Conclusion However, these findings provide information about natural products for the prevention and treatment of LPS-induced toxicity, but the scientific validation of natural products requires more evidence on animal models to replace modern commercial medicine.
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Affiliation(s)
| | - Mohammad Behdadfard
- Student Research Committee, Birjand University of Medical Sciences, Birjand, Iran
| | | | - Mohammad Reza Khazdair
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
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Özarslan TO, Sırmatel F, Karabörk ŞÖ, Düzcü SE, Astarcı HM. Acinetobacter baumannii pneumonia increases surfactant proteins SP-A, SP-B, and SP-D levels, while decreasing SP-C level in bronchoalveolar lavage in rats. Microbes Infect 2022. [DOI: 10.1016/j.micinf.2022.105064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Khadangi F, Tremblay-Pitre S, Dufour-Mailhot A, Rojas-Ruiz AB, Boucher M, Henry C, Fereydoonzad L, Brunet D, Robichaud A, Bossé Y. Sensitive physiological readouts to evaluate countermeasures for lipopolysaccharide-induced lung alterations in mice. Am J Physiol Lung Cell Mol Physiol 2022; 323:L107-L120. [PMID: 35670484 DOI: 10.1152/ajplung.00073.2022] [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: 11/22/2022] Open
Abstract
Despite decades of research, studies investigating the physiological alterations caused by an acute bout of inflammation induced by exposing the lung to lipopolysaccharide have yielded inconsistent results. This can be attributed to small effects and/or a lack of fitted physiological testing. Herein, a comprehensive investigation of lung mechanics was conducted in 270 male C57BL/6 mice at 24, 48 or 96 h after an intranasal exposure to saline or lipopolysaccharide at either 1 or 3 mg/kg (30 mice per group). Traditional techniques that probe the lung using small-amplitude perturbations (i.e., oscillometry) were used, together with less conventional and new techniques that probe the lung using maneuvers of large amplitudes. The latter include a partial and a full-range pressure-volume maneuvers to measure quasi-static elastance, compliance, total lung volume, vital capacity and residual volume. The results demonstrate that lung mechanics assessed by oscillometry was only slightly affected by lipopolysaccharide, confirming previous findings. In contradistinction, lipopolysaccharide markedly altered mechanics when the lung was probed with maneuvers of large amplitudes. With the dose of 3 mg/kg at the peak of inflammation (48 h post-exposure), lipopolysaccharide increased quasi-static elastance by 26.7% (p<0.0001), and decreased compliance by 34.5% (p<0.0001). It also decreased lung volumes, including total lung capacity, vital capacity and residual volume by 33.3%, 30.5% and 43.3%, respectively (all p<0.0001). These newly reported physiological alterations represent sensitive outcomes to efficiently evaluate countermeasures (e.g., drugs) in the context of several lung diseases.
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Affiliation(s)
- Fatemeh Khadangi
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | - Sophie Tremblay-Pitre
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | - Alexis Dufour-Mailhot
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | - Andrés Bruno Rojas-Ruiz
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | - Magali Boucher
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | - Cyndi Henry
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
| | | | - David Brunet
- SCIREQ - Scientific Respiratory Equipment Inc., Montreal, Canada
| | | | - Ynuk Bossé
- Institut Universitaire de Cardiologie et de Pneumologie de Quebec, Université Laval, Québec, Canada
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Saadat S, Beigoli S, Khazdair MR, Amin F, Boskabady MH. Experimental and Clinical Studies on the Effects of Natural Products on Noxious Agents-Induced Lung Disorders, a Review. Front Nutr 2022; 9:867914. [PMID: 35662950 PMCID: PMC9158561 DOI: 10.3389/fnut.2022.867914] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 03/16/2022] [Indexed: 12/27/2022] Open
Abstract
The harmful effects of various noxious agents (NA) are well-known and there are reports regarding the induction of various lung disorders due to exposure to these agents both in animal and human studies. In addition, various studies have shown the effects of natural products (NP) on NA-induced lung disorders. The effects of various NP, including medicinal plants and their derivatives, on lung injury induced by NA, were reviewed in this study. The improving effects of various NP including medicinal plants, such as Aloe vera, Anemarrhena asphodeloides, Avena sativa, Crocus sativus, Curcuma longa, Dioscorea batatas, Glycyrrhiza glabra, Gentiana veitchiorum, Gentiopicroside, Houttuynia cordata, Hibiscus sabdariffa, Hochu-ekki-to, Hippophae rhamnoides, Juglans regia, Melanocarpa fruit juice, Mikania glomerata, Mikania laevigata, Moringa oleifera, Myrtus communis L., Lamiaceae, Myrtle, Mosla scabra leaves, Nectandra leucantha, Nigella sativa, Origanum vulgare L, Pulicaria petiolaris, Paulownia tomentosa, Pomegranate seed oil, Raphanus sativus L. var niger, Rosa canina, Schizonepeta tenuifolia, Thymus vulgaris, Taraxacum mongolicum, Tribulus Terrestris, Telfairia occidentalis, Taraxacum officinale, TADIOS, Xuebijing, Viola yedoensis, Zataria multiflora, Zingiber officinale, Yin-Chiao-San, and their derivatives, on lung injury induced by NA were shown by their effects on lung inflammatory cells and mediators, oxidative stress markers, immune responses, and pathological changes in the experimental studies. Some clinical studies also showed the therapeutic effects of NP on respiratory symptoms, pulmonary function tests (PFT), and inflammatory markers. Therefore, the results of this study showed the possible therapeutic effects of various NP on NA-induced lung disorders by the amelioration of various features of lung injury. However, further clinical studies are needed to support the therapeutic effects of NP on NA-induced lung disorders for clinical practice purposes.
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Affiliation(s)
- Saeideh Saadat
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Physiology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Sima Beigoli
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Reza Khazdair
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Fatemeh Amin
- Physiology-Pharmacology Research Center, Research Institute of Basic Medical Sciences, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
- Department of Physiology and Pharmacology, School of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Mohammad Hossein Boskabady
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
- Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
- *Correspondence: Mohammad Hossein Boskabady ;
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10
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Bednash JS, Kagan VE, Englert JA, Farkas D, Tyurina YY, Tyurin VA, Samovich SN, Farkas L, Elhance A, Johns F, Lee H, Cheng L, Majumdar A, Jones D, Mejia OR, Ruane-Foster M, Londino JD, Mallampalli RK, Robinson RT. Syrian hamsters as a model of lung injury with SARS-CoV-2 infection: Pathologic, physiologic, and detailed molecular profiling. Transl Res 2022; 240:1-16. [PMID: 34740873 PMCID: PMC8562047 DOI: 10.1016/j.trsl.2021.10.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/25/2021] [Accepted: 10/27/2021] [Indexed: 12/16/2022]
Abstract
The acute respiratory distress syndrome (ARDS) is a common complication of severe COVID-19 (coronavirus disease 2019) caused by SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) infection. Knowledge of molecular mechanisms driving host responses to SARS-CoV-2 is limited by the lack of reliable preclinical models of COVID-19 that recapitulate human illness. Further, existing COVID-19 animal models are not characterized as models of experimental acute lung injury (ALI) or ARDS. Acknowledging differences in experimental lung injury in animal models and human ARDS, here we systematically evaluate a model of experimental acute lung injury as a result of SARS-CoV-2 infection in Syrian golden hamsters. Following intranasal inoculation, hamsters demonstrate acute SARS-CoV-2 infection, viral pneumonia, and systemic illness but survive infection with clearance of virus. Hamsters exposed to SARS-CoV-2 exhibited key features of experimental ALI, including histologic evidence of lung injury, increased pulmonary permeability, acute inflammation, and hypoxemia. RNA sequencing of lungs indicated upregulation of inflammatory mediators that persisted after infection clearance. Lipidomic analysis demonstrated significant differences in hamster phospholipidome with SARS-CoV-2 infection. Lungs infected with SARS-CoV-2 showed increased apoptosis and ferroptosis. Thus, SARS-CoV-2 infected hamsters exhibit key features of experimental lung injury supporting their use as a preclinical model of COVID-19 ARDS.
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Key Words
- ards, acute respiratory distress syndrome
- ali, acute lung injury
- covid-19, coronavirus disease 2019
- sars-cov-2, severe acute respiratory syndrome coronavirus-2
- ace2, angiotensin converting enzyme 2
- bal, bronchoalveolar lavage
- ifit, inf-induced protein with tetratricopeptide repeats
- ifn, interferon
- ihc, immunohistochemistry
- il, interleukin
- mpo, myeloperoxidase
- ngs, next generation sequencing
- opls-da, orthogonal projection of latent structures - discriminate analysis
- pc, phosphatidylcholine
- pe, phosphatidylethanolamine
- pfu, plaque forming unit
- pla2, phospholipase a2
- tfrc, transferrin receptor protein 1
- vip, variable importance in projection
- voc, variant of concern
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Affiliation(s)
- Joseph S Bednash
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio.
| | - Valerian E Kagan
- Center for Free Radical and Antioxidant Health, Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Joshua A Englert
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Daniela Farkas
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Yulia Y Tyurina
- Center for Free Radical and Antioxidant Health, Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Vladimir A Tyurin
- Center for Free Radical and Antioxidant Health, Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Svetlana N Samovich
- Center for Free Radical and Antioxidant Health, Department of Environmental and Occupational Health, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Laszlo Farkas
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Ajit Elhance
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Finny Johns
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Hyunwook Lee
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Lijun Cheng
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio
| | - Abhishek Majumdar
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio
| | - Daniel Jones
- The Ohio State University Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Oscar Rosas Mejia
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio
| | - Marisa Ruane-Foster
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio
| | - James D Londino
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Rama K Mallampalli
- Department of Internal Medicine, Division of Pulmonary, Critical Care, and Sleep Medicine, The Ohio State University, Columbus, Ohio
| | - Richard T Robinson
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, Ohio.
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11
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Khazdair MR, Boskabady MH. Possible treatment with medicinal herbs and their ingredients of lung disorders induced by sulfur mustard exposures: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:54191-54208. [PMID: 34382165 DOI: 10.1007/s11356-021-15697-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
Chemical warfare (CW) agents are toxic synthetic chemicals that affect human's health, and sulfur mustard (SM) is a well-known chemical weapon that caused deaths of victims. The lung is the main target of SM exposure, and there are no definitive therapeutic modalities for lung injury induced by this agent. The possible therapeutic effects of medicinal plants and their active ingredients on lung injury induced by SM were reviewed in this article until the end of June 2021. Medicinal plants including Crocus sativus, Curcuma longa, Thymus vulgaris, Nigella sativa, and Zataria multiflora and also natural compounds showed therapeutic potential in improving of various features of lung injury induced by SM and other related chemical agents. Several studies showed therapeutic effects of some medicinal plants and natural products on lung inflammation, oxidative stress, and immune responses in experimental studies in SM-induced lung injury. In addition, clinical studies also showed the effect of medicinal plants and natural compounds on respiratory symptoms, pulmonary function tests (PFTs), and inflammatory markers. The therapeutic effects of medicinal plants and natural products on lung disorder induced by SM and related chemical agents were shown through amelioration of various features of lung injury.
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Affiliation(s)
- Mohammad Reza Khazdair
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Mohammad Hossein Boskabady
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
- Department of Physiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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12
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Zhang B, Tian X, Li G, Zhao H, Wang X, Yin Y, Yu J, Meng C. Methane Inhalation Protects Against Lung Ischemia-Reperfusion Injury in Rats by Regulating Pulmonary Surfactant via the Nrf2 Pathway. Front Physiol 2021; 12:615974. [PMID: 34054564 PMCID: PMC8149795 DOI: 10.3389/fphys.2021.615974] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 04/15/2021] [Indexed: 12/28/2022] Open
Abstract
Methane (CH4) exerted protective effects against lung ischemia-reperfusion (I/R) injury, but the mechanism remains unclear, especially the role of pulmonary surfactant. Therefore, this study aimed to explore the effects of CH4 inhalation on pulmonary surfactant in rat lung I/R injury and to elucidate the mechanism. Rats were randomly divided into three groups (n = 6): the sham, I/R control, and I/R CH4 groups. In the sham group, only thoracotomy was performed on the rats. In the I/R control and I/R CH4 groups, the rats underwent left hilum occlusion for 90 min, followed by reperfusion for 180 min and ventilation with O2 or 2.5% CH4, respectively. Compared with those of the sham group, the levels of large surfactant aggregates (LAs) in pulmonary surfactant, lung compliance, oxygenation decreased, the small surfactant aggregates (SAs), inflammatory response, oxidative stress injury, and cell apoptosis increased in the control group (P < 0.05). Compared to the control treatment, CH4 increased LA (0.42 ± 0.06 vs. 0.31 ± 0.09 mg/kg), oxygenation (201 ± 11 vs. 151 ± 14 mmHg), and lung compliance (16.8 ± 1.0 vs. 11.5 ± 1.3 ml/kg), as well as total antioxidant capacity and Nrf2 protein expression and decreased the inflammatory response and number of apoptotic cells (P < 0.05). In conclusion, CH4 inhalation decreased oxidative stress injury, inflammatory response, and cell apoptosis, and improved lung function through Nrf2-mediated pulmonary surfactant regulation in rat lung I/R injury.
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Affiliation(s)
- Bing Zhang
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xiaojun Tian
- Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Guangqi Li
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Han Zhao
- Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Xuan Wang
- Department of Anesthesiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yanwei Yin
- Department of Pain Management, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Junmin Yu
- Department of Pain Management, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Chao Meng
- Department of Pain Management, The Affiliated Hospital of Qingdao University, Qingdao, China
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13
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Yazicioglu T, Mühlfeld C, Autilio C, Huang CK, Bär C, Dittrich-Breiholz O, Thum T, Pérez-Gil J, Schmiedl A, Brandenberger C. Aging impairs alveolar epithelial type II cell function in acute lung injury. Am J Physiol Lung Cell Mol Physiol 2020; 319:L755-L769. [DOI: 10.1152/ajplung.00093.2020] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Morbidity and mortality rates in acute lung injury (ALI) increase with age. As alveolar epithelial type II cells (AE2) are crucial for lung function and repair, we hypothesized that aging promotes senescence in AE2 and contributes to the severity and impaired regeneration in ALI. ALI was induced with 2.5 μg lipopolysaccharide/g body weight in young (3 mo) and old (18 mo) mice that were euthanized 24 h, 72 h, and 10 days later. Lung function, pulmonary surfactant activity, stereology, cell senescence, and single-cell RNA sequencing analyses were performed to investigate AE2 function in aging and ALI. In old mice, surfactant activity was severely impaired. A 60% mortality rate and lung function decline were observed in old, but not in young, mice with ALI. AE2 of young mice adapted to injury by increasing intracellular surfactant volume and proliferation rate. In old mice, however, this adaptive response was compromised, and AE2 of old mice showed signs of cell senescence, increased inflammatory signaling, and impaired surfactant metabolism in ALI. These findings provide evidence that ALI promotes a limited proliferation rate, increased inflammatory response, and surfactant dysfunction in old, but not in young, mice, supporting an impaired regenerative capacity and reduced survival rate in ALI with advancing age.
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Affiliation(s)
- Tolga Yazicioglu
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Christian Mühlfeld
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | - Chiara Autilio
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute “Hospital 12 de Octubre (imas12)”, Complutense University, Madrid, Spain
| | - Cheng-Kai Huang
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
| | - Christian Bär
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
- REBIRTH Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany
| | | | - Thomas Thum
- Institute of Molecular and Translational Therapeutic Strategies, Hannover Medical School, Hannover, Germany
- REBIRTH Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany
| | - Jesús Pérez-Gil
- Department of Biochemistry and Molecular Biology, Faculty of Biology, and Research Institute “Hospital 12 de Octubre (imas12)”, Complutense University, Madrid, Spain
| | - Andreas Schmiedl
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
| | - Christina Brandenberger
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover, Germany
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14
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The Effect of Modified Porcine Surfactant Alone or in Combination with Polymyxin B on Lung Homeostasis in LPS-Challenged and Mechanically Ventilated Adult Rats. Molecules 2020; 25:molecules25194356. [PMID: 32977392 PMCID: PMC7582504 DOI: 10.3390/molecules25194356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 09/20/2020] [Accepted: 09/21/2020] [Indexed: 01/21/2023] Open
Abstract
The study aimed to prove the hypothesis that exogenous surfactant and an antibiotic polymyxin B (PxB) can more effectively reduce lipopolysaccharide (LPS)-induced acute lung injury (ALI) than surfactant treatment alone, and to evaluate the effect of this treatment on the gene expression of surfactant proteins (SPs). Anesthetized rats were intratracheally instilled with different doses of LPS to induce ALI. Animals with LPS 500 μg/kg have been treated with exogenous surfactant (poractant alfa, Curosurf®, 50 mg PL/kg b.w.) or surfactant with PxB 1% w.w. (PSUR + PxB) and mechanically ventilated for 5 hrs. LPS at 500 μg/kg increased lung edema, oxidative stress, and the levels of proinflammatory mediators in lung tissue and bronchoalveolar lavage fluid (BALF). PSUR reduced lung edema and oxidative stress in the lungs and IL-6 in BALF. This effect was further potentiated by PxB added to PSUR. Exogenous surfactant enhanced the gene expression of SP-A, SP-B, and SP-C, however, gene expression for all SPs was reduced after treatment with PSUR + PxB. In mechanically ventilated rats with LPS-induced ALI, the positive effect of exogenous surfactant on inflammation and oxidative stress was potentiated with PxB. Due to the tendency for reduced SPs gene expression after surfactant/PxB treatment topical use of PxB should be considered with caution.
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15
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Mokhtari-Zaer A, Norouzi F, Askari VR, Khazdair MR, Roshan NM, Boskabady M, Hosseini M, Boskabady MH. The protective effect of Nigella sativa extract on lung inflammation and oxidative stress induced by lipopolysaccharide in rats. JOURNAL OF ETHNOPHARMACOLOGY 2020; 253:112653. [PMID: 32035219 DOI: 10.1016/j.jep.2020.112653] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 02/01/2020] [Accepted: 02/04/2020] [Indexed: 05/12/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Oxidative stress during inflammation can increase inflammation and damage tissue. Nigella sativa L. (NS) showed many pharmacological properties including antioxidant and anti-inflammatory activities. AIM OF THE STUDY In this study, the preventive effect of NS on lung inflammation and oxidative stress induced by lipopolysaccharide (LPS) in the rats was investigated. MATERIALS AND METHODS Male rats were assigned to: Control, LPS (1 mg/kg, i.p.), LPS + NS (100, 200, 400 mg/kg, i.p.), (10 per group). Saline (1 ml/kg) was intra-peritoneal (i.p.) injected instead of LPS in the rats of the control group. LPS dissolved in saline and injected i.p. daily for 14 days. Treatment with NS extracts started two days before LPS administration and treatment continued during LPS administration. White blood cells (WBC), total and differential as well as oxidative stress index in bronchoalveolar fluid (BALF) and serum, TGF-β1, IFN-γ, PGE2, and IL-4 levels in the BALF and lung histopathology were examined. RESULTS LPS administration increased total WBC, eosinophils, neutrophils, basophils, and monocytes counts as well as oxidative stress markers in the BALF and serum as well as TGF-β1, IFN-γ, PGE2, IL-4 levels in the BALF and pathological changes of the lung tissue. All of these effects were reduced by NS extract treatment dose-dependently. CONCLUSION These results suggested the protective effects of NS extract on lung inflammation and oxidative stress as well as its effect on lung pathology induced by LPS dose-dependently.
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Affiliation(s)
- Amin Mokhtari-Zaer
- Pharmaceutical Sciences Research Center, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Fatemeh Norouzi
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Vahid Reza Askari
- Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Pharmacological Research Center of Medicinal Plants, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Pharmacology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Reza Khazdair
- Cardiovascular Diseases Research Center, Birjand University of Medical Sciences, Birjand, Iran
| | - Nama Mohammadian Roshan
- Department of Pathology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mostafa Boskabady
- Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahmoud Hosseini
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Division of Neurocognitive Sciences, Psychiatry and Behavioral Sciences Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammad Hossein Boskabady
- Department of Physiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
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16
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Natarajan K, Gangam K, Meganathan V, Gottipati KR, Mitchell C, Boggaram V. Organic dust inhibits surfactant protein expression by reducing thyroid transcription factor-1 levels in human lung epithelial cells. Innate Immun 2020; 25:118-131. [PMID: 30774012 PMCID: PMC6830861 DOI: 10.1177/1753425919827360] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Exposure to organic dust is a risk factor for the development of respiratory
diseases. Surfactant proteins (SP) reduce alveolar surface tension and modulate
innate immune responses to control lung inflammation. Therefore, changes in SP
levels could contribute to the development of organic-dust-induced respiratory
diseases. Because information on the effects of organic dust on SP levels is
lacking, we studied the effects of dust from a poultry farm on SP expression. We
found that dust extract reduced SP-A and SP-B mRNA and protein levels in H441
human lung epithelial cells by inhibiting their promoter activities, but did not
have any effect on SP-D protein levels. Dust extract also reduced SP-A and SP-C
levels in primary human alveolar epithelial cells. The inhibitory effects were
not due to LPS or protease activities present in dust extract or mediated via
oxidative stress, but were dependent on a heat-labile factor(s). Thyroid
transcription factor-1, a key transcriptional activator of SP expression, was
reduced in dust-extract-treated cells, indicating that its down-regulation
mediates inhibition of SP levels. Our study implies that down-regulation of SP
levels by organic dust could contribute to the development of lung inflammation
and respiratory diseases in humans.
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Affiliation(s)
- Kartiga Natarajan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Keerthi Gangam
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Velmurugan Meganathan
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Koteswara R Gottipati
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Courtney Mitchell
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
| | - Vijay Boggaram
- Department of Cellular and Molecular Biology, University of Texas Health Science Center at Tyler, USA
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17
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Short-Term versus Long-Term Culture of A549 Cells for Evaluating the Effects of Lipopolysaccharide on Oxidative Stress, Surfactant Proteins and Cathelicidin LL-37. Int J Mol Sci 2020; 21:ijms21031148. [PMID: 32050475 PMCID: PMC7036965 DOI: 10.3390/ijms21031148] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/02/2020] [Accepted: 02/07/2020] [Indexed: 12/20/2022] Open
Abstract
Alveolar epithelial type II (ATII) cells and their proper function are essential for maintaining lung integrity and homeostasis. However, they can be damaged by lipopolysaccharide (LPS) during Gram-negative bacterial infection. Thus, this study evaluated and compared the effects of LPS on short and long-term cultures of A549 cells by determining the cell viability, levels of oxidative stress and antimicrobial peptide cathelicidin LL-37 and changes in the expression of surfactant proteins (SPs). Moreover, we compared A549 cell response to LPS in the presence of different serum concentrations. Additionally, the effect of N-acetylcysteine (NAC) on LPS-induced oxidative stress as a possible treatment was determined. Our results indicate that A549 cells are relatively resistant to LPS and able to maintain integrity even at high LPS concentrations. Their response to endotoxin is partially dependent on serum concentration. NAC failed to lower LPS-induced oxidative stress in A549 cells. Finally, LPS modulates SP gene expression in A549 cells in a time dependent manner and differences between short and long-term cultures were present. Our results support the idea that long-term cultivation of A549 cells could promote a more ATII-like phenotype and thus could be a more suitable model for ATII cells, especially for in vitro studies dealing with surfactant production.
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18
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Cai W, Shen Y, Han N, Chen H, Zhang M. Evaluation of lipopolysaccharide-induced acute lung injury attenuation in mice by Glycyrrhiza glabra. Pharmacogn Mag 2020. [DOI: 10.4103/pm.pm_189_19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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19
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Yang Y, Li Q, Tan F, Zhang J, Zhu W. Mechanism of IL-8-induced acute lung injury through pulmonary surfactant proteins A and B. Exp Ther Med 2019; 19:287-293. [PMID: 31853301 PMCID: PMC6909794 DOI: 10.3892/etm.2019.8192] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 11/01/2019] [Indexed: 12/03/2022] Open
Abstract
This study explored how interleukin-8 (IL-8) causes acute lung injury (ALI) through pulmonary surfactant protein A (SP-A) and surfactant protein B (SP-B). Serum was collected from 53 ALI patients and further 56 healthy subjects who underwent physical examination. The IL-8, SP-A, and SP-B levels were determined using enzyme-linked immunosorbent assay (ELISA). An ALI model was constructed using lipopolysaccharide (LSP)-induced normal A549 cells. siRNA was employed to interfere with the expression of IL-8, SP-A and SP-B. Western blot analysis was carried out to determine the protein levels, and MTT assay to determine the cell activity. In addition, co-immunoprecipitation (Co-IP) assay was used to verify the interaction between IL-8, SP-A and SP-B. ALI patients showed high expression of serum IL-8, and low expression of SP-A and SP-B, and IL-8 was negatively correlated with SP-A and SP-B, respectively. LSP-induced normal A549 cells showed increased expression of IL-8 and decreased expression of SP-A and SP-B. Silencing IL-8 led to increased expression levels of SP-A, SP-B and Bcl2, decreased expression levels of caspase-9, caspase-3, Bax, TNF-α, IL-17 and IL-1β, reduced cell apoptosis rate, and enhanced cell viability. Silencing SP-A and SP-B resulted in increased expression of IL-8, caspase-9, caspase-3, Bax, TNF-α, IL-17 and IL-1β, and decreased expression of Bcl2. Co-IP assay revealed that IL-8 could interact with SP-A and SP-B, respectively. IL-8 induces apoptosis by inhibiting SP-A and SP-B, and intensifies cellular inflammatory reaction, leading eventually to ALI.
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Affiliation(s)
- Yinong Yang
- Medical School, Hunan University of Medicine, Huaihua, Hunan 418000, P.R. China
| | - Qing Li
- Nursing School, Hunan University of Medicine, Huaihua, Hunan 418000, P.R. China
| | - Feng Tan
- School of Stomatology, Hunan University of Medicine, Huaihua, Hunan 418000, P.R. China
| | - Jun Zhang
- Medical School, Hunan University of Medicine, Huaihua, Hunan 418000, P.R. China
| | - Wu Zhu
- Medical School, Hunan University of Medicine, Huaihua, Hunan 418000, P.R. China
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20
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Nova Z, Skovierova H, Calkovska A. Alveolar-Capillary Membrane-Related Pulmonary Cells as a Target in Endotoxin-Induced Acute Lung Injury. Int J Mol Sci 2019; 20:ijms20040831. [PMID: 30769918 PMCID: PMC6412348 DOI: 10.3390/ijms20040831] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 02/06/2023] Open
Abstract
The main function of the lungs is oxygen transport from the atmosphere into the blood circulation, while it is necessary to keep the pulmonary tissue relatively free of pathogens. This is a difficult task because the respiratory system is constantly exposed to harmful substances entering the lungs by inhalation or via the blood stream. Individual types of lung cells are equipped with the mechanisms that maintain pulmonary homeostasis. Because of the clinical significance of acute respiratory distress syndrome (ARDS) the article refers to the physiological role of alveolar epithelial cells type I and II, endothelial cells, alveolar macrophages, and fibroblasts. However, all these cells can be damaged by lipopolysaccharide (LPS) which can reach the airspaces as the major component of the outer membrane of Gram-negative bacteria, and lead to local and systemic inflammation and toxicity. We also highlight a negative effect of LPS on lung cells related to alveolar-capillary barrier and their response to LPS exposure. Additionally, we describe the molecular mechanism of LPS signal transduction pathway in lung cells.
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Affiliation(s)
- Zuzana Nova
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Henrieta Skovierova
- Biomedical Center Martin, Division of Molecular Medicine, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
| | - Andrea Calkovska
- Department of Physiology and Biomedical Center Martin, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, 03601 Martin, Slovakia.
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Scoville DK, White CC, Botta D, An D, Afsharinejad Z, Bammler TK, Gao X, Altemeier WA, Kavanagh TJ. Quantum dot induced acute changes in lung mechanics are mouse strain dependent. Inhal Toxicol 2018; 30:397-403. [DOI: 10.1080/08958378.2018.1542046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- David K. Scoville
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Collin C. White
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Dianne Botta
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Dowon An
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Zahra Afsharinejad
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Theo K. Bammler
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
| | - Xiaohu Gao
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | | | - Terrance J. Kavanagh
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, USA
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Chen X, Wu S, Tang L, Ma L, Wang F, Feng H, Meng J, Han Z. Mesenchymal stem cells overexpressing heme oxygenase-1 ameliorate lipopolysaccharide-induced acute lung injury in rats. J Cell Physiol 2018; 234:7301-7319. [PMID: 30362554 DOI: 10.1002/jcp.27488] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 09/06/2018] [Indexed: 12/18/2022]
Abstract
Acute lung injury (ALI) and acute respiratory distress syndrome (ARDS) are common and potentially lethal clinical syndromes characterized by acute respiratory failure resulting from excessive pulmonary inflammation, noncardiogenic pulmonary edema, and alveolar-capillary barrier disruption. At present, there is no effective and specific therapy for ALI/ARDS. Mesenchymal stem cells (MSCs) have well-known therapeutic potential in patients with ALI/ARDS. Heme oxygenase-1 (HO-1), a cytoprotective enzyme, possesses antioxidative, anti-inflammatory, and antiapoptotic effects. Thus, a combination of MSC transplantation with HO-1 delivery may have an additional protective effect against ALI/ARDS. This study investigated the effect of HO-1-modified bone-marrow-derived MSCs (MSCs-HO-1) on lipopolysaccharide (LPS)-induced ALI and its underlying mechanisms. We established MSCs-HO-1 through lentiviral transduction. The ALI rat model was established by successive LPS inhalations following injection with MSCs-HO-1. The survival rate, histological changes in the lungs, total protein concentration and neutrophil counts in bronchoalveolar lavage fluid, lung wet/dry weight ratio, cytokine levels in serum and lungs, nuclear transcription factor-κB activity, and protein expression of Toll-like receptor 4 signaling adaptors were examined. Furthermore, the cell viability, apoptosis, and paracrine activity of MSCs-HO-1 were examined under inflammatory stimuli in vitro. MSCs-HO-1 injection improved these parameters compared with primary unmodified MSCs. Moreover, MSCs-HO-1 had superior prosurvival and antiapoptotic properties and enhanced paracrine functions in vitro. Therefore, MSCs-HO-1 exert an enhanced protective effect to alleviate LPS-induced ALI in rats, and the mechanisms may be partially associated with superior prosurvival, antiapoptosis, and enhanced paracrine functions of MSCs-HO-1. These findings provide a novel insight into MSC-based therapeutic strategies for treating ALI/ARDS.
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Affiliation(s)
- Xuxin Chen
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
| | - Shanshan Wu
- Department of Radiation Oncology, Navy General Hospital of the PLA, Beijing, China
| | - Lu Tang
- Department of Neurology, The First Hospital of Changsha, Changsha, China
| | - Lei Ma
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
| | - Fan Wang
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
| | - Huasong Feng
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
| | - Jiguang Meng
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
| | - Zhihai Han
- Department of Respiratory Medicine, Navy General Hospital of the PLA, Beijing, China
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8-Isoprostane is an early biomarker for oxidative stress in chlorine-induced acute lung injury. Toxicol Lett 2017; 282:1-7. [PMID: 29017959 DOI: 10.1016/j.toxlet.2017.10.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 11/21/2022]
Abstract
Inhalation of chlorine (Cl2) may cause oxidative acute lung injury (ALI) characterized by pulmonary edema, pneumonitis, and hyperreactive airways. The aim of the study was to identify possible biomarkers for Cl2-induced ALI. Female BALB/c mice were exposed to Cl2 for 15min using two protocols 1) concentration-dependent response (25-200ppm) and 2) time-kinetics (2h-14days post-exposure). Exposure to 50-200ppm Cl2 caused a concentration-dependent inflammatory response with increased expression of IL-1β, IL-6 and CXCL1/KC in bronchoalveolar lavage fluid 2-6h after exposure which was followed by increased lung permeability and a neutrophilic inflammation 12-24h post-exposure. The early inflammatory cytokine response was associated with a clear but transient increase of 8-isoprostane, a biomarker for oxidative stress, with its maximum at 2h after exposure. An increase of 8-isoprostane could also be detected in serum 2h after exposure to 200ppm Cl2, which was followed by increased levels of IL-6 and CXCL1/KC and signs of increased fibrinogen and PAI-1. Melphalan, a non-oxidizing mustard gas analog, did not increase the 8-isoprostane levels, indicating that 8-isoprostane is induced in airways through direct oxidation by Cl2. We conclude that 8-isoprostane represents an early biomarker for oxidative stress in airways and in the blood circulation following Cl2-exposure.
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KOLOMAZNIK M, NOVA Z, CALKOVSKA A. Pulmonary Surfactant and Bacterial Lipopolysaccharide: The Interaction and its Functional Consequences. Physiol Res 2017; 66:S147-S157. [DOI: 10.33549/physiolres.933672] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The respiratory system is constantly exposed to pathogens which enter the lungs by inhalation or via blood stream. Lipopolysaccharide (LPS), also named endotoxin, can reach the airspaces as the major component of the outer membrane of Gram-negative bacteria, and lead to local inflammation and systemic toxicity. LPS affects alveolar type II (ATII) cells and pulmonary surfactant and although surfactant molecule has the effective protective mechanisms, excessive amount of LPS interacts with surfactant film and leads to its inactivation. From immunological point of view, surfactant specific proteins (SPs) SP-A and SP-D are best characterized, however, there is increasing evidence on the involvement of SP-B and SP-C and certain phospholipids in immune reactions. In animal models, the instillation of LPS to the respiratory system induces acute lung injury (ALI). It is of clinical importance that endotoxin-induced lung injury can be favorably influenced by intratracheal instillation of exogenous surfactant. The beneficial effect of this treatment was confirmed for both natural porcine and synthetic surfactants. It is believed that the surfactant preparations have anti-inflammatory properties through regulating cytokine production by inflammatory cells. The mechanism by which LPS interferes with ATII cells and surfactant layer, and its consequences are discussed below.
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Affiliation(s)
| | | | - A. CALKOVSKA
- Department of Physiology, Jessenius Faculty of Medicine in Martin, Comenius University in Bratislava, Martin, Slovakia
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Araújo MN, Santos CL, Samary CS, Heil LBB, Cavalcanti VCM, Cruz FF, Felix NS, Silva JD, Morales MM, Pelosi P, Fernandes FC, Villela NR, Silva PL, Rocco PRM. Sevoflurane, Compared With Isoflurane, Minimizes Lung Damage in Pulmonary but Not in Extrapulmonary Acute Respiratory Distress Syndrome in Rats. Anesth Analg 2017; 125:491-498. [PMID: 28277329 DOI: 10.1213/ane.0000000000001927] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Volatile anesthetics modulate inflammation in acute respiratory distress syndrome (ARDS). However, it is unclear whether they act differently depending on ARDS etiology. We hypothesized that the in vivo and in vitro effects of sevoflurane and isoflurane on lung damage would not differ in pulmonary (p) and extrapulmonary (exp) ARDS. METHODS Twenty-four Wistar rats were randomized to undergo general anesthesia (1-2 minutes) with sevoflurane and isoflurane. Animals were then further randomized to receive Escherichia coli lipopolysaccharide (LPS) intratracheally (ARDSp) or intraperitoneally (ARDSexp), and 24 hours after ARDS induction, they were subjected to 60 minutes of sevoflurane or isoflurane anesthesia at 1 minimal alveolar concentration. The primary outcome measure was interleukin (IL)-6 mRNA expression in lung tissue. Secondary outcomes included gas exchange, lung mechanics, histology, and mRNA expression of IL-10, nuclear factor erythroid 2-related factor-2 (Nrf2), surfactant protein (SP)-B, vascular cell adhesion molecule-1, epithelial amiloride-sensitive Na-channel subunits α and γ, and sodium-potassium-adenosine-triphosphatase pump subunits α1 (α1-Na,K-ATPase) and β1 (β1-Na,K-ATPase). Additional ARDSp and ARDSexp animals (n = 6 per group) were anesthetized with sodium thiopental but not mechanically ventilated (NV) to serve as controls. Separately, to identify how sevoflurane and isoflurane act on type II epithelial cells, A549 human lung epithelial cells were stimulated with LPS (20 µg/mL) for 24 hours, and SP-B expression was quantified after further exposure to sevoflurane or isoflurane (1 minimal alveolar concentration ) for 60 minutes. RESULTS In ARDSp, sevoflurane reduced IL-6 expression to a greater degree than isoflurane (P = .04). Static lung elastance (P = .0049) and alveolar collapse (P = .033) were lower in sevoflurane than isoflurane, whereas Nrf2 (P = .036), SP-B (P = .042), and β1-Na,K-ATPase (P = .038) expressions were higher in sevoflurane. In ARDSexp, no significant differences were observed in lung mechanics, alveolar collapse, or molecular parameters between sevoflurane and isoflurane. In vitro, SP-B expression was higher in sevoflurane than isoflurane (P = .026). CONCLUSIONS Compared with isoflurane, sevoflurane did not affect lung inflammation in ARDSexp, but it did reduce lung inflammation in ARDSp.
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Affiliation(s)
- Mariana N Araújo
- From the *Laboratory of Pulmonary Investigation, Carlos Chagas Filho Biophysics Institute; †Department of Surgical Sciences and Integrated Diagnostics; ‡Center of Experimental Surgery, Department of Surgery, School of Medicine; §Laboratory of Cellular and Molecular Physiology, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; ‖Department of Surgical Sciences and Integrated Diagnostics, Istituto di Ricovero e Cura a Carattere Scientifico, Azienda Ospedaliera Universitaria, San Martino-IST, University of Genoa, Genoa, Italy; ¶Division of Anesthesiology, Department of Surgery, State University of Rio de Janeiro, Rio de Janeiro, Brazil
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Wu G, Dai X, Li X, Jiang H. ANTIOXIDANT AND ANTI-INFLAMMATORY EFFECTS OF RHAMNAZIN ON LIPOPOLYSACCHARIDE-INDUCED ACUTE LUNG INJURY AND INFLAMMATION IN RATS. AFRICAN JOURNAL OF TRADITIONAL, COMPLEMENTARY, AND ALTERNATIVE MEDICINES 2017. [PMID: 28638883 PMCID: PMC5471467 DOI: 10.21010/ajtcam.v14i4.23] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Background: Acute Lung Injury (ALI) results into severe inflammation and oxidative stress to the pulmonary tissue. Rhamnazin is a natural flavonoid and known for its antioxidant and anti-inflammatory properties. Materials and methods: The antioxidative and anti-inflammatory properties rhamnazin were tested for protection against the acute lung injury. We investigated whether rhamnazin improves the lipopolysaccharide (LPS)-induced ALI in an animal model (rat). We also studied the probable molecular mechanism of action of rhamnazin. Rhamnazin was injected intraperitoneally (i.p.) (5, 10 and 20 mg/kg) two days before intratracheal LPS challenge (5mg/kg). The changes in lung wet-to-dry weight ratio, LDH activity, pulmonary histopathology, BALF protein concentration, MPO activity, oxidative stress, cytokine production were estimated. Results: The results showed a significant attenuation of all the inflammatory parameters and a marked improvement in the pulmonary histopathology in the animal groups pretreated with rhamnazin. The rhamnazin pretreated group also showed activation of Nrf2 pathway and attenuation of ROS such as H2O2, MDA and hydroxyl ion. These results indicated that rhamnazin could attenuate the symptoms of ALI in rats due to its strong antioxidant and anti-inflammatory properties. Conclusion: The results strongly demonstrated that rhamnazin provides protection against LPS-induced ALI. The underlying mechanisms of its anti-inflammatory action may include inhibition of Nrf2 mediated antioxidative pathway.
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Affiliation(s)
- GuoRong Wu
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - XiaoPing Dai
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - XiangRong Li
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
| | - HePing Jiang
- Department of respiratory medicine, Changzhou Jintan District People's Hospital, Changzhou, Jiangsu 213200, China
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Selim AO, Gouda ZA, Selim SA. An experimental study of a rat model of emphysema induced by cigarette smoke exposure and the effect of Survanta therapy. Ann Anat 2017; 211:69-77. [DOI: 10.1016/j.aanat.2016.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/18/2016] [Accepted: 12/19/2016] [Indexed: 12/26/2022]
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Wang K, Qin S, Liang Z, Zhang Y, Xu Y, Chen A, Guo X, Cheng H, Zhang X, Ke Y. Epithelial disruption of Gab1 perturbs surfactant homeostasis and predisposes mice to lung injuries. Am J Physiol Lung Cell Mol Physiol 2016; 311:L1149-L1159. [PMID: 27793798 DOI: 10.1152/ajplung.00107.2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 10/19/2016] [Indexed: 12/21/2022] Open
Abstract
GRB2-associated-binding protein 1 (Gab1) belongs to Gab adaptor family, which integrates multiple signals in response to the epithelial growth factors. Recent genetic studies identified genetic variants of human Gab1 gene as potential risk factors of asthmatic inflammation. However, the functions of Gab1 in lungs remain largely unknown. Alveolar type-II cells (AT-IIs) are responsible for surfactant homeostasis and essentially regulate lung inflammation following various injuries (3). In this study, in vitro knockdown of Gab1 was shown to decrease the surfactant proteins (SPs) levels in AT-IIs. We further examined in vivo Gab1 functions through alveolar epithelium-specific Gab1 knockout mice (Gab1Δ/Δ). In vivo Gab1 deficiency leads to a decrease in SP synthesis and the appearance of disorganized lamellar bodies. Histological analysis of the lung sections in Gab1Δ/Δ mice shows no apparent pathological alterations or inflammation. However, Gab1Δ/Δ mice demonstrate inflammatory responses during the LPS-induced acute lung injury. Similarly, in mice challenged with bleomycin, fibrotic lesions were found to be aggravated in Gab1Δ/Δ These observations suggest that the abolishment of Gab1 in AT-IIs impairs SP homeostasis, predisposing mice to lung injuries. In addition, we observed that the production of surfactants in AT-IIs overexpressing Gab1 mutants, in which Shp2 phosphatase and PI3K kinase binding sites have been mutated (Gab1ΔShp2, Gab1ΔPI3K), has been considerably attenuated. Together, these findings provide the direct evidence about the roles of docking protein Gab1 in lungs, adding to our understanding of acute and interstitial lung diseases caused by the disruption of alveolar SP homeostasis.
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Affiliation(s)
- Kai Wang
- Department of Respiratory Medicine, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Shenlu Qin
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Zuyu Liang
- Department of Respiratory Medicine, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yun Zhang
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Yingchun Xu
- Department of Pulmonary Diseases, Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, China; and
| | - An Chen
- Department of Neonatal, Children's Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaohong Guo
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Hongqiang Cheng
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Xue Zhang
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuehai Ke
- Department of Pathology and Pathophysiology, and Program in Molecular Cell Biology, Zhejiang University School of Medicine, Hangzhou, China;
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Kuethe DO, Filipczak PT, Hix JM, Gigliotti AP, Estépar RSJ, Washko GR, Baron RM, Fredenburgh LE. Magnetic resonance imaging provides sensitive in vivo assessment of experimental ventilator-induced lung injury. Am J Physiol Lung Cell Mol Physiol 2016; 311:L208-18. [PMID: 27288491 DOI: 10.1152/ajplung.00459.2015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Accepted: 06/06/2016] [Indexed: 11/22/2022] Open
Abstract
Animal models play a critical role in the study of acute respiratory distress syndrome (ARDS) and ventilator-induced lung injury (VILI). One limitation has been the lack of a suitable method for serial assessment of acute lung injury (ALI) in vivo. In this study, we demonstrate the sensitivity of magnetic resonance imaging (MRI) to assess ALI in real time in rat models of VILI. Sprague-Dawley rats were untreated or treated with intratracheal lipopolysaccharide or PBS. After 48 h, animals were mechanically ventilated for up to 15 h to induce VILI. Free induction decay (FID)-projection images were made hourly. Image data were collected continuously for 30 min and divided into 13 phases of the ventilatory cycle to make cinematic images. Interleaved measurements of respiratory mechanics were performed using a flexiVent ventilator. The degree of lung infiltration was quantified in serial images throughout the progression or resolution of VILI. MRI detected VILI significantly earlier (3.8 ± 1.6 h) than it was detected by altered lung mechanics (9.5 ± 3.9 h, P = 0.0156). Animals with VILI had a significant increase in the Index of Infiltration (P = 0.0027), and early regional lung infiltrates detected by MRI correlated with edema and inflammatory lung injury on histopathology. We were also able to visualize and quantify regression of VILI in real time upon institution of protective mechanical ventilation. Magnetic resonance lung imaging can be utilized to investigate mechanisms underlying the development and propagation of ALI, and to test the therapeutic effects of new treatments and ventilator strategies on the resolution of ALI.
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Affiliation(s)
- Dean O Kuethe
- ABQMR Inc., Albuquerque, New Mexico; Lovelace Respiratory Research Institute, Albuquerque, New Mexico; and
| | - Piotr T Filipczak
- Lovelace Respiratory Research Institute, Albuquerque, New Mexico; and Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Jeremy M Hix
- Lovelace Respiratory Research Institute, Albuquerque, New Mexico; and
| | | | - Raúl San José Estépar
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - George R Washko
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Rebecca M Baron
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Laura E Fredenburgh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
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Isoflurane Ameliorates Acute Lung Injury by Preserving Epithelial Tight Junction Integrity. Anesthesiology 2015; 123:377-88. [PMID: 26068207 DOI: 10.1097/aln.0000000000000742] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Isoflurane may be protective in preclinical models of lung injury, but its use in patients with lung injury remains controversial and the mechanism of its protective effects remains unclear. The authors hypothesized that this protection is mediated at the level of alveolar tight junctions and investigated the possibility in a two-hit model of lung injury that mirrors human acute respiratory distress syndrome. METHODS Wild-type mice were treated with isoflurane 1 h after exposure to nebulized endotoxin (n = 8) or saline control (n = 9) and then allowed to recover for 24 h before mechanical ventilation (MV; tidal volume, 15 ml/kg, 2 h) producing ventilator-induced lung injury. Mouse lung epithelial cells were similarly treated with isoflurane 1 h after exposure to lipopolysaccharide. Cells were cyclically stretched the following day to mirror the MV protocol used in vivo. RESULTS Mice treated with isoflurane following exposure to inhaled endotoxin and before MV exhibited significantly less physiologic lung dysfunction. These effects appeared to be mediated by decreased vascular leak, but not altered inflammatory indices. Mouse lung epithelial cells treated with lipopolysaccharide and cyclic stretch and lungs harvested from mice after treatment with lipopolysaccharide and MV had decreased levels of a key tight junction protein (i.e., zona occludens 1) that was rescued by isoflurane treatment. CONCLUSIONS Isoflurane rescued lung injury induced by a two-hit model of endotoxin exposure followed by MV by maintaining the integrity of the alveolar-capillary barrier possibly by modulating the expression of a key tight junction protein.
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Tetenev K, Cloutier ME, von Reyn JA, Ather JL, Candon J, Allen GB. Synergy between acid and endotoxin in an experimental model of aspiration-related lung injury progression. Am J Physiol Lung Cell Mol Physiol 2015; 309:L1103-11. [PMID: 26408552 DOI: 10.1152/ajplung.00197.2014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Accepted: 09/17/2015] [Indexed: 01/11/2023] Open
Abstract
Aspiration is a common cause of lung injury, but it is unclear why some cases are self-limited while others progress to acute respiratory distress syndrome (ARDS). Sporadic exposure to more than one insult could account for this variable progression. We investigated whether synergy between airway acid and endotoxin (LPS) amplifies injury severity in mice and whether LPS levels in human patients could corroborate our experimental findings. C57BL/6 mice aspirated acid (pH 1.3) or normal saline (NS), followed by LPS aerosol or nothing. Bronchoalveolar lavage fluid (BALF) was obtained 2 to 49 h later. Mice were injected with FITC-dextran 25 h after aspiration and connected to a ventilator, and lung elastance (H) measured periodically following deep inflation (DI). Endotracheal and gastric aspirates were also collected from patients in the intensive care unit and assayed for pH and LPS. Lung instability (ΔH following DI) and pressure-volume hysteresis in acid- or LPS-exposed mice was greater than in controls but markedly greater in the combined acid/LPS group. BALF neutrophils, cytokines, protein, and FITC-dextran in the acid/LPS mice were geometrically higher than all other groups. BALF from acid-only mice markedly amplified LPS-induced TNF-α production in cultured macrophages. Human subjects had variable endotracheal LPS levels with the highest burden in those at higher risk of aspiration. Acid aspiration amplifies LPS signaling in mice to disrupt barrier function and lung mechanics in synergy. High variation in airway LPS and greater airway LPS burden in patients at higher risk of aspiration could help explain the sporadic progression of aspiration to ARDS.
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Affiliation(s)
- Konstantin Tetenev
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont; Siberian State Medical University, Tomsk, Russia; and
| | - Mary E Cloutier
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont
| | - Jessica A von Reyn
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont
| | - Jennifer L Ather
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont
| | - James Candon
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont
| | - Gilman B Allen
- Vermont Lung Center, Department of Medicine, University of Vermont, Burlington, Vermont; Department of Medicine, University of Vermont Medical Center, Burlington, Vermont
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Mouratis MA, Magkrioti C, Oikonomou N, Katsifa A, Prestwich GD, Kaffe E, Aidinis V. Autotaxin and Endotoxin-Induced Acute Lung Injury. PLoS One 2015. [PMID: 26196781 PMCID: PMC4509763 DOI: 10.1371/journal.pone.0133619] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Acute Lung Injury (ALI) is a life-threatening, diffuse heterogeneous lung injury characterized by acute onset, pulmonary edema and respiratory failure. Lipopolysaccharide (LPS) is a common cause of both direct and indirect lung injury and when administered to a mouse induces a lung phenotype exhibiting some of the clinical characteristics of human ALI. Here, we report that LPS inhalation in mice results in increased bronchoalveolar lavage fluid (BALF) levels of Autotaxin (ATX, Enpp2), a lysophospholipase D largely responsible for the conversion of lysophosphatidylcholine (LPC) to lysophosphatidic acid (LPA) in biological fluids and chronically inflamed sites. In agreement, gradual increases were also detected in BALF LPA levels, following inflammation and pulmonary edema. However, genetic or pharmacologic targeting of ATX had minor effects in ALI severity, suggesting no major involvement of the ATX/LPA axis in acute inflammation. Moreover, systemic, chronic exposure to increased ATX/LPA levels was shown to predispose to and/or to promote acute inflammation and ALI unlike chronic inflammatory pathophysiological situations, further suggesting a differential involvement of the ATX/LPA axis in acute versus chronic pulmonary inflammation.
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Affiliation(s)
- Marios-Angelos Mouratis
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
| | - Christiana Magkrioti
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
| | - Nikos Oikonomou
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
| | - Aggeliki Katsifa
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
| | - Glenn D. Prestwich
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah, United States of America
| | - Eleanna Kaffe
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
| | - Vassilis Aidinis
- Division of Immunology, Biomedical Sciences Research Center “Alexander Fleming”, Athens, Greece
- * E-mail:
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Takahashi A, Bartolák-Suki E, Majumdar A, Suki B. Changes in respiratory elastance after deep inspirations reflect surface film functionality in mice with acute lung injury. J Appl Physiol (1985) 2015; 119:258-65. [PMID: 26066828 DOI: 10.1152/japplphysiol.00476.2014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 05/13/2015] [Indexed: 01/11/2023] Open
Abstract
Pulmonary surfactant reduces surface tension in the lung and prevents alveolar collapse. Following a deep inspiration (DI), respiratory elastance first drops then gradually increases due to surface film and tissue viscoelasticity. In acute lung injury (ALI), this increase is faster and governed by alveolar collapse due to increased surface tension. We hypothesized that the rate of increase in elastance reflects the deficiency of surfactant in the lung. To test this, mice were ventilated before (baseline) and after saline lavage obtained by injecting 0.8 ml and withdrawing 0.7 ml fluid (severe ALI) or injecting 0.1 ml (mild ALI). After two DIs, elastance was tracked for 10 min followed by a full lavage to assess surfactant proteins B (SP-B) and C (SP-C) content. Following 2 DIs, the increases in elastance during 10 min ventilation (ΔH) were 3.60 ± 0.61, 5.35 ± 1.04, and 8.33 ± 0.84 cmH2O/ml in baseline mice and mice with mild and severe ALI, respectively (P < 0.0001). SP-B and SP-C in the lavage fluid dropped by 32.4% and 24.9% in the mild and 50.4% and 39.6% in the severe ALI, respectively. Furthermore, ΔH showed a strong negative correlation with both SP-B (r(2) = 0.801) and SP-C (r(2) = 0.810) content. The ΔH was, however, much smaller when the lavage fluid also contained exogeneous SP-B and SP-C. Thus ΔH can be interpreted as an organ level measure of surface film functionality in lavage-induced ALI in mice. This method could prove useful in clinical situations such as diagnosing surfactant problems, monitoring recovery from lung injury or the effectiveness of surfactant therapy.
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Affiliation(s)
- Ayuko Takahashi
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
| | | | - Arnab Majumdar
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
| | - Béla Suki
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts
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Kebaabetswe LP, Haick AK, Gritsenko MA, Fillmore TL, Chu RK, Purvine SO, Webb-Robertson BJ, Matzke MM, Smith RD, Waters KM, Metz TO, Miura TA. Proteomic analysis reveals down-regulation of surfactant protein B in murine type II pneumocytes infected with influenza A virus. Virology 2015; 483:96-107. [PMID: 25965799 DOI: 10.1016/j.virol.2015.03.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 01/13/2015] [Accepted: 03/18/2015] [Indexed: 11/29/2022]
Abstract
Infection of type II alveolar epithelial (ATII) cells by influenza A viruses (IAV) correlates with severe respiratory disease in humans and mice. To understand pathogenic mechanisms during IAV infection of ATII cells, murine ATII cells were cultured to maintain a differentiated phenotype, infected with IAV-PR8, which causes severe lung pathology in mice, and proteomics analyses were performed using liquid chromatography-mass spectrometry. PR8 infection increased levels of proteins involved in interferon signaling, antigen presentation, and cytoskeleton regulation. Proteins involved in mitochondrial membrane permeability, energy metabolism, and chromatin formation had reduced levels in PR8-infected cells. Phenotypic markers of ATII cells in vivo were identified, confirming the differentiation status of the cultures. Surfactant protein B had decreased levels in PR8-infected cells, which was confirmed by immunoblotting and immunofluorescence assays. Analysis of ATII cell protein profiles will elucidate cellular processes in IAV pathogenesis, which may provide insight into potential therapies to modulate disease severity.
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Affiliation(s)
- Lemme P Kebaabetswe
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Anoria K Haick
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Marina A Gritsenko
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Thomas L Fillmore
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Rosalie K Chu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Samuel O Purvine
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Bobbie-Jo Webb-Robertson
- Computational and Statistical Analytics Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Melissa M Matzke
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Richard D Smith
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Katrina M Waters
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Thomas O Metz
- Biological Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Tanya A Miura
- Department of Biological Sciences, University of Idaho, Moscow, ID 83844, USA.
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Zhang Y, Zhang L, Wang L, Qiao L, Liang J, Yan H, Zhao K, Liu X, Wang L. Identification and examination of a novel 9-bp insert/deletion polymorphism on porcine SFTPA1 exon 2 associated with acute lung injury using an oleic acid-acute lung injury model. Anim Sci J 2014; 86:573-8. [PMID: 25442010 DOI: 10.1111/asj.12330] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Accepted: 08/15/2014] [Indexed: 01/27/2023]
Abstract
The pulmonary surfactant-associated protein (SFTPA1, SP-A) gene has been studied as a candidate gene for lung disease resistance in humans and livestock. The objective of the present study was to identify polymorphisms of the porcine SFTPA1 gene coding region and its association with acute lung injury (ALI). Through DNA sequencing and the PCR-single-strand conformation polymorphism method, a novel 9-bp nucleotide insertion (+) or deletion (-) was detected on exon 2 of SFTPA1, which causes a change in three amino acids, namely, alanine (Ala), glycine (Gly) and proline (Pro). Individuals of three genotypes (-/-, +/- and +/+) were divided into equal groups from 60 Rongchang pigs that were genotyped. These pigs were selected for participation in the oleic acid (OA)-ALI model by 1-h and 3-h injections of OA, and there were equal numbers of pigs in the control and injection groups. The lung water content, a marker for acute lung injury, was measured in this study; there is a significant correlation between high lung water content and the presence of the 9-bp indel polymorphism (P < 0.01). The lung water content of the OA injection group was markedly higher than that of the control group and lung water content for the +/+ genotype was significantly higher than that of the others in the 1-h group (P < 0.01). No differences in the expression of the SFTPA1 gene were found among individuals with different SFTPA1 genotypes, indicating that the trait is not caused by a linked polymorphism causing altered expression of the gene. The individuals with the -/- genotype showed lower lung water content than the +/+ genotype pigs, which suggests that polymorphism could be a potential marker for lung disease-resistant pig breeding and that pig can be a potential animal model for human lung disease resistance in future studies.
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Affiliation(s)
- Yuebo Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Longchao Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ligang Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | | | - Jing Liang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hua Yan
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kebin Zhao
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xin Liu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lixian Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Lim Y. The Protective Effects of Green Tea Catechin on The Bleomycin and Cyclophosphamide Induced Cytotoxicity. KOREAN JOURNAL OF CLINICAL LABORATORY SCIENCE 2014. [DOI: 10.15324/kjcls.2014.46.2.75] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Yong Lim
- Department of Clinical Laboratory Science, Dong-eui University, Busan 614-714, Korea
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Massa CB, Scott P, Abramova E, Gardner C, Laskin DL, Gow AJ. Acute chlorine gas exposure produces transient inflammation and a progressive alteration in surfactant composition with accompanying mechanical dysfunction. Toxicol Appl Pharmacol 2014; 278:53-64. [PMID: 24582687 DOI: 10.1016/j.taap.2014.02.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/29/2014] [Accepted: 02/04/2014] [Indexed: 12/17/2022]
Abstract
Acute Cl2 exposure following industrial accidents or military/terrorist activity causes pulmonary injury and severe acute respiratory distress. Prior studies suggest that antioxidant depletion is important in producing dysfunction, however a pathophysiologic mechanism has not been elucidated. We propose that acute Cl2 inhalation leads to oxidative modification of lung lining fluid, producing surfactant inactivation, inflammation and mechanical respiratory dysfunction at the organ level. C57BL/6J mice underwent whole-body exposure to an effective 60ppm-hour Cl2 dose, and were euthanized 3, 24 and 48h later. Whereas pulmonary architecture and endothelial barrier function were preserved, transient neutrophilia, peaking at 24h, was noted. Increased expression of ARG1, CCL2, RETLNA, IL-1b, and PTGS2 genes was observed in bronchoalveolar lavage (BAL) cells with peak change in all genes at 24h. Cl2 exposure had no effect on NOS2 mRNA or iNOS protein expression, nor on BAL NO3(-) or NO2(-). Expression of the alternative macrophage activation markers, Relm-α and mannose receptor was increased in alveolar macrophages and pulmonary epithelium. Capillary surfactometry demonstrated impaired surfactant function, and altered BAL phospholipid and surfactant protein content following exposure. Organ level respiratory function was assessed by forced oscillation technique at 5 end expiratory pressures. Cl2 exposure had no significant effect on either airway or tissue resistance. Pulmonary elastance was elevated with time following exposure and demonstrated PEEP refractory derecruitment at 48h, despite waning inflammation. These data support a role for surfactant inactivation as a physiologic mechanism underlying respiratory dysfunction following Cl2 inhalation.
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Affiliation(s)
- Christopher B Massa
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA
| | - Pamela Scott
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA
| | - Elena Abramova
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA
| | - Carol Gardner
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA
| | - Debra L Laskin
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA
| | - Andrew J Gow
- Department of Pharmacology & Toxicology, Ernest Mario School of Pharmacy, Rutgers University, USA.
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Bein K, Di Giuseppe M, Mischler SE, Ortiz LA, Leikauf GD. LPS-treated macrophage cytokines repress surfactant protein-B in lung epithelial cells. Am J Respir Cell Mol Biol 2013; 49:306-15. [PMID: 23590297 PMCID: PMC3824031 DOI: 10.1165/rcmb.2012-0283oc] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 03/07/2013] [Indexed: 02/04/2023] Open
Abstract
In the mouse lung, Escherichia coli LPS can decrease surfactant protein-B (SFTPB) mRNA and protein concentrations. LPS also regulates the expression, synthesis, and concentrations of a variety of gene and metabolic products that inhibit SFTPB gene expression. The purpose of the present study was to determine whether LPS acts directly or indirectly on pulmonary epithelial cells to trigger signaling pathways that inhibit SFTPB expression, and whether the transcription factor CCAAT/enhancer binding protein (C/EBP)-β (CEBPB) is a downstream inhibitory effector. To investigate the mechanism of SFTPB repression, the human pulmonary epithelial cell lines NCI-H441 (H441) and NCI-H820 (H820) and the mouse macrophage-like cell line RAW264.7 were treated with LPS. Whereas LPS did not decrease SFTPB transcripts in H441 or H820 cells, the conditioned medium of LPS-treated RAW264.7 cells decreased SFTPB transcripts in H441 and H820 cells, and inhibited SFTPB promoter activity in H441 cells. In the presence of neutralizing anti-tumor necrosis factor (TNF) antibodies, the conditioned medium of LPS-treated RAW264.7 cells did not inhibit SFTPB promoter activity. In H441 cells treated with recombinant TNF protein, SFTPB transcripts decreased, whereas CEBPB transcripts increased and the transient coexpression of CEBPB decreased SFTPB promoter activity. Further, CEBPB short, interfering RNA increased basal SFTPB transcripts and countered the decrease of SFTPB transcripts by TNF. Together, these findings suggest that macrophages participate in the repression of SFTPB expression by LPS, and that macrophage-released cytokines (including TNF) regulate the transcription factor CEBPB, which can function as a downstream transcriptional repressor of SFTPB gene expression in pulmonary epithelial cells.
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Affiliation(s)
- Kiflai Bein
- Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15219-3130, USA.
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Yang R, Yang L, Shen X, Cheng W, Zhao B, Ali KH, Qian Z, Ji H. Suppression of NF-κB pathway by crocetin contributes to attenuation of lipopolysaccharide-induced acute lung injury in mice. Eur J Pharmacol 2012; 674:391-6. [DOI: 10.1016/j.ejphar.2011.08.029] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 08/11/2011] [Accepted: 08/27/2011] [Indexed: 10/17/2022]
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Schmiedl A, Behrens J, Zscheppang K, Purevdorj E, von Mayersbach D, Liese A, Dammann CEL. Lipopolysaccharide-induced injury is more pronounced in fetal transgenic ErbB4-deleted lungs. Am J Physiol Lung Cell Mol Physiol 2011; 301:L490-9. [PMID: 21724861 DOI: 10.1152/ajplung.00131.2010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Pulmonary ErbB4 deletion leads to a delay in fetal lung development, alveolar simplification, and lung function disturbances in adult mice. We generated a model of intrauterine infection in ErbB4 transgenic mice to study the additive effects of antenatal LPS administration and ErbB4 deletion during fetal lung development. Pregnant mice were treated intra-amniotically with an LPS dose of 4 μg at E17 of gestation. Lungs were analyzed 24 h later. A significant influx of inflammatory cells was seen in all LPS-treated lungs. In heterozygote control lungs, LPS treatment resulted in a delay of lung morphogenesis characterized by a significant increase in the fraction of mesenchyme, a decrease in gas exchange area, and disorganization of elastic fibers. Surfactant protein (Sftp)b and Sftpc were upregulated, but mRNA of Sftpb and Sftpc was downregulated compared with non-LPS-treated controls. The mRNA of Sftpa1 and Sftpd was upregulated. In ErbB4-deleted lungs, the LPS effects were more pronounced, resulting in a further delay in morphological development, a more pronounced inflammation in the parenchyma, and a significant higher increase in all Sftp. The effect on Sftpb and Sftpc mRNA was somewhat different, resulting in a significant increase. These results imply a major role of ErbB4 in LPS-induced signaling in structural and functional lung development.
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Affiliation(s)
- Andreas Schmiedl
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
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42
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Cycloxygenase inhibition enhances the effects of surfactant therapy in endotoxin-induced rat model of ARDS. Inflammation 2011; 34:92-8. [PMID: 20422273 DOI: 10.1007/s10753-010-9211-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The present study examines the relationships between inflammation and surfactant protein (SP) expression in a rodent model of acute respiratory distress syndrome (ARDS). Rats were intratracheally instilled with lipopolysaccharide (LPS) for 72 hours to induce ARDS and further treated with exogenous surfactant. Prostaglandin E(2) (PGE(2)) levels, cycloxygenase (COX) activity and alterations in SP-A apoprotein were measured. COX and SP-A expressions in lung tissue and SP-A-positive cells were determined by Western blot and immunofluorescence, respectively. PGE(2) levels and COX activity and its expression were increased with LPS exposure, whereas SP-A protein and percentage of SP-A-positive cells were decreased, which were subsequently reverted back by exogenous surfactant instillation. Because inhibition of COX-2 action is proposed to be useful in various inflammatory lung injuries, these results suggest that COX-2 expression and the possible beneficial effects of its inhibition on lung inflammation and dysfunction with LPS-ARDS corresponds closely with reduced SP-A expression.
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Xu YN, Zhang Z, Ma P, Zhang SH. Adenovirus-delivered angiopoietin 1 accelerates the resolution of inflammation of acute endotoxic lung injury in mice. Anesth Analg 2011; 112:1403-10. [PMID: 21543779 DOI: 10.1213/ane.0b013e318213fbd3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND The immune system plays a key role in protecting the organism from infection. Timely resolution of the inflammatory response to infection plays a vital role in returning homeostasis and maintaining normal organ function. Angiopoietin1 prevents endothelial activation, part of the inflammatory response to a pathogen, and has an anti-inflammatory effect in acute lung injury. We designed this study to investigate whether increasing serum production of angiopoietin1 by IV administration of adenoviral-delivered angiopoietin1 could accelerate the resolution of inflammation in endotoxin-induced acute lung injury in mice. METHODS Lipopolysaccharide was intratracheally instilled to induce acute lung injury in animals pretreated for 24 hours with adenoviral-GFP vector or adenoviral-GFP-angiopoietin1, respectively. An additional 6 mice in each pretreatment group were killed before lipopolysaccharide instillation to serve as controls. Indices of resolution of inflammation were analyzed. Apoptotic polymorphonuclear leukocytes and their phagocytosis by macrophages were determined by fluorescent activated cell sorter. The expression of angiopoietin1 in tissues and granulocyte macrophage colony-stimulating factor in the bronchoalveolar lavage fluid were measured. RESULTS Lipopolysaccharide induced leukocyte infiltration into air spaces, with maximal infiltration 48 hours after lipopolysaccharide instillation. Pretreatment with adenovirus-GFP-angiopoietin1 markedly increased angiopoietin1 expression, reduced leukocyte, and neutrophil infiltration and shortened the duration of inflammation. Adenovirus-GFP-angiopoietin1 pretreatment augmented the magnitude without altering the time course of granulocyte macrophage colony-stimulating factor. CONCLUSIONS Our results suggest that angiopoietin1 pretreatment promotes resolution of inflammation in endotoxin-induced acute lung injury in mice by accelerating the apoptosis of neutrophils and their phagocytosis by macrophages.
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Affiliation(s)
- You-Nian Xu
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Deletion of peroxiredoxin 6 potentiates lipopolysaccharide-induced acute lung injury in mice*. Crit Care Med 2011; 39:756-64. [DOI: 10.1097/ccm.0b013e318206befd] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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45
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Chen H, Bai C, Wang X. The value of the lipopolysaccharide-induced acute lung injury model in respiratory medicine. Expert Rev Respir Med 2011; 4:773-83. [PMID: 21128752 DOI: 10.1586/ers.10.71] [Citation(s) in RCA: 299] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is a syndrome characterized by pulmonary edema and acute inflammation. Lipopolysaccharide (LPS), a major component in Gram-negative bacteria, has been used to induce ALI/ARDS. LPS-induced animal models highlight ways to explore mechanisms of multiple diseases and provide useful information on the discovery of novel biomarkers and drug targets. However, each model has its own merits and drawbacks. The goal of this article is to summarize and evaluate the results of experimental findings in LPS-induced ALI/ARDS, and the possible mechanisms and treatments elucidated. Advantages and disadvantages of such models in pulmonary research and new directions for future investigations are also discussed.
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Affiliation(s)
- Hong Chen
- Department of Pulmonary Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
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46
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Lim SB, Rubinstein I, Sadikot RT, Artwohl JE, Önyüksel H. A novel peptide nanomedicine against acute lung injury: GLP-1 in phospholipid micelles. Pharm Res 2010; 28:662-72. [PMID: 21108040 DOI: 10.1007/s11095-010-0322-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Accepted: 11/08/2010] [Indexed: 12/25/2022]
Abstract
PURPOSE Treatment of acute lung injury (ALI) observed in Gram-negative sepsis represents an unmet medical need due to a high mortality rate and lack of effective treatment. Accordingly, we developed and characterized a novel nanomedicine against ALI. We showed that when human glucagon-like peptide 1(7-36) (GLP-1) self-associated with PEGylated phospholipid micelles (SSM), the resulting GLP1-SSM (hydrodynamic size, ~15 nm) exerted effective anti-inflammatory protection against lipopolysaccharide (LPS)-induced ALI in mice. METHODS GLP1-SSM was prepared by incubating GLP-1 with SSM dispersion in saline and characterized using fluorescence spectroscopy and circular dichroism. Bioactivity was tested by in vitro cAMP induction, while in vivo anti-inflammatory effects were determined by lung neutrophil cell count, myeloperoxidase activity and pro-inflammatory cytokine levels in LPS-induced ALI mice. RESULTS Amphipathic GLP-1 interacted spontaneously with SSM as indicated by increased α-helicity and fluorescence emission. This association elicited increased bioactivity as determined by in vitro cAMP production. Correspondingly, subcutaneous GLP1-SSM (5-30 nmol/mouse) manifested dose-dependent decrease in lung neutrophil influx, myeloperoxidase activity and interleukin-6 in ALI mice. By contrast, GLP-1 in saline showed no significant anti-inflammatory effects against LPS-induced lung hyper-inflammatory responses. CONCLUSIONS GLP1-SSM is a promising novel anti-inflammatory nanomedicine against ALI and should be further developed for its transition to clinics.
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Affiliation(s)
- Sok Bee Lim
- Department of Biopharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
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Zhang X, Huang H, Yang T, Ye Y, Shan J, Yin Z, Luo L. Chlorogenic acid protects mice against lipopolysaccharide-induced acute lung injury. Injury 2010; 41:746-52. [PMID: 20227691 DOI: 10.1016/j.injury.2010.02.029] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2009] [Revised: 12/15/2009] [Accepted: 02/15/2010] [Indexed: 02/02/2023]
Abstract
Chlorogenic acid (CGA) is one of the most abundant polyphenol compounds in human diet. Our previous in vitro study demonstrates that CGA presents anti-inflammatory activities in RAW 264.7 cells. Here we show that CGA protects mice against lipopolysaccharide (LPS)-induced acute lung injury (ALI). We treated mice with CGA (5, 20 and 50 mg/kg body weight) 30 min or 3 h after intratracheal administration of LPS. The histological results showed that CGA, at dose of 50 mg/kg, protected mice from LPS-induced ALI which displayed by edema, haemorrhage, blood vessel and alveolar structural damage. CGA inhibited LPS-increased pulmonary MPO activity and migration of polymorphonuclear neutrophils (PMNs) into bronchoalveolar lavage fluid (BALF). Furthermore, CGA markedly decreased the activity of inducible nitric oxide synthase (iNOS) in lung tissues and thus prevented nitric oxide (NO) release in response to LPS challenge. In conclusion, these results indicated that CGA was greatly effective in inhibiting ALI and might act as a potential therapeutic reagent for treating ALI in the future.
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Affiliation(s)
- Xu Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Rd, Nanjing, Jiangsu 210093, PR China
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48
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Airway and tissue mechanics in ventilated patients with pneumonia. Respir Physiol Neurobiol 2010; 171:101-9. [DOI: 10.1016/j.resp.2010.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 03/02/2010] [Accepted: 03/02/2010] [Indexed: 12/13/2022]
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49
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Quintero PA, Knolle MD, Cala LF, Zhuang Y, Owen CA. Matrix metalloproteinase-8 inactivates macrophage inflammatory protein-1 alpha to reduce acute lung inflammation and injury in mice. THE JOURNAL OF IMMUNOLOGY 2009; 184:1575-88. [PMID: 20042585 DOI: 10.4049/jimmunol.0900290] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
To determine the role of matrix metalloproteinase-8 (MMP-8) in acute lung injury (ALI), we delivered LPS or bleomycin by the intratracheal route to MMP-8(-/-) mice versus wild-type (WT) mice or subjected the mice to hyperoxia (95% O(2)) and measured lung inflammation and injury at intervals. MMP-8(-/-) mice with ALI had greater increases in lung polymorphonuclear neutrophils (PMNs) and macrophage counts, measures of alveolar capillary barrier injury, lung elastance, and mortality than WT mice with ALI. Bronchoalveolar lavage fluid (BALF) from LPS-treated MMP-8(-/-) mice had more MIP-1alpha than BALF from LPS-treated WT mice, but similar levels of other pro- and anti-inflammatory mediators. MIP-1alpha(-/-) mice with ALI had less acute lung inflammation and injury than WT mice with ALI, confirming that MIP-1alpha promotes acute lung inflammation and injury in mice. Genetically deleting MIP-1alpha in MMP-8(-/-) mice reduced the increased lung inflammation and injury and mortality in MMP-8(-/-) mice with ALI. Soluble MMP-8 cleaved and inactivated MIP-1alpha in vitro, but membrane-bound MMP-8 on activated PMNs had greater MIP-1alpha-degrading activity than soluble MMP-8. High levels of membrane-bound MMP-8 were detected on lung PMNs from LPS-treated WT mice, but soluble, active MMP-8 was not detected in BALF samples. Thus, MMP-8 has novel roles in restraining lung inflammation and in limiting alveolar capillary barrier injury during ALI in mice by inactivating MIP-1alpha. In addition, membrane-bound MMP-8 on activated lung PMNs is likely to be the key bioactive form of the enzyme that limits lung inflammation and alveolar capillary barrier injury during ALI.
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Affiliation(s)
- Pablo A Quintero
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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50
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Bánfi A, Tiszlavicz L, Székely E, Peták F, Tóth-Szüki V, Baráti L, Bari F, Novák Z. DEVELOPMENT OF BRONCHUS-ASSOCIATED LYMPHOID TISSUE HYPERPLASIA FOLLOWING LIPOPOLYSACCHARIDE-INDUCED LUNG INFLAMMATION IN RATS. Exp Lung Res 2009; 35:186-97. [DOI: 10.1080/01902140802495862] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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