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Karki P, Zhang CO, Promnares K, Li Y, Ke Y, Birukova AA, Birukov KG. Truncated oxidized phospholipids exacerbate endothelial dysfunction and lung injury caused by bacterial pathogens. Cell Signal 2023; 109:110804. [PMID: 37437826 PMCID: PMC10544726 DOI: 10.1016/j.cellsig.2023.110804] [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: 04/21/2023] [Revised: 07/06/2023] [Accepted: 07/08/2023] [Indexed: 07/14/2023]
Abstract
Oxidized phospholipids (OxPLs) are present at basal levels in circulation of healthy individuals, but a substantial increase and changes in composition of OxPLs may rapidly occur during microbial infections, sepsis, and trauma. Specifically, truncated oxidized phospholipids (Tr-OxPLs) exhibit detrimental effects on pulmonary endothelium, yet their role on modulation of lung injury caused by bacterial pathogens remains to be elucidated. This study investigated the effects of Tr-OxPL species: KOdiA-PC, POV-PC, PON-PC, PAz-PC, PGPC, and Lyso-PC on endothelial permeability and inflammatory responses to gram-positive bacterial particles. Results showed that all six tested Tr-OxPLs augmented endothelial barrier disruption caused by heat-killed Staphylococcus aureus (HKSA) as determined by VE-cadherin immunostaining and monitoring transendothelial electrical resistance. In parallel, even moderate elevation of Tr-OxPLs augmented HKSA-induced activation of NF-κB, secretion of IL-6 and IL-8, and protein expression of ICAM-1 and VCAM-1. In the mouse model of acute lung injury caused by intranasal injection of HKSA, intravenous Tr-OxPLs administration augmented HKSA-induced increase in BAL protein content and cell counts, tissue expression of TNFα, KC, IL1β, and CCL2, and promoted vascular leak monitored by lung infiltration of Evans Blue. These results suggest that elevated Tr-OxPLs act as critical risk factor worsening bacterial pathogen-induced endothelial dysfunction and lung injury.
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Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America.
| | - Chen-Ou Zhang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Kamoltip Promnares
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Yue Li
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Yunbo Ke
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Anna A Birukova
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
| | - Konstantin G Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, MD 21201, United States of America
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Wang L, Letsiou E, Wang H, Belvitch P, Meliton LN, Brown ME, Bandela M, Chen J, Garcia JGN, Dudek SM. MRSA-induced endothelial permeability and acute lung injury are attenuated by FTY720 S-phosphonate. Am J Physiol Lung Cell Mol Physiol 2022; 322:L149-L161. [PMID: 35015568 PMCID: PMC8794017 DOI: 10.1152/ajplung.00100.2021] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Disruption of the lung endothelial barrier is a hallmark of acute respiratory distress syndrome (ARDS), for which no effective pharmacologic treatments exist. Prior work has demonstrated that FTY720 S-phosphonate (Tys), an analog of sphingosine-1-phosphate (S1P) and FTY720, exhibits potent endothelial cell (EC) barrier protective properties. In this study, we investigated the in vitro and in vivo efficacy of Tys against methicillin-resistant Staphylococcus aureus (MRSA), a frequent bacterial cause of ARDS. Tys-protected human lung EC from barrier disruption induced by heat-killed MRSA (HK-MRSA) or staphylococcal α-toxin and attenuated MRSA-induced cytoskeletal changes associated with barrier disruption, including actin stress fiber formation and loss of peripheral VE-cadherin and cortactin. Tys-inhibited Rho and myosin light chain (MLC) activation after MRSA and blocked MRSA-induced NF-κB activation and release of the proinflammatory cytokines, IL-6 and IL-8. In vivo, intratracheal administration of live MRSA in mice caused significant vascular leakage and leukocyte infiltration into the alveolar space. Pre- or posttreatment with Tys attenuated MRSA-induced lung permeability and levels of alveolar neutrophils. Posttreatment with Tys significantly reduced levels of bronchoalveolar lavage (BAL) VCAM-1 and plasma IL-6 and KC induced by MRSA. Dynamic intravital imaging of mouse lungs demonstrated Tys attenuation of HK-MRSA-induced interstitial edema and neutrophil infiltration into lung tissue. Tys did not directly inhibit MRSA growth or viability in vitro. In conclusion, Tys inhibits lung EC barrier disruption and proinflammatory signaling induced by MRSA in vitro and attenuates acute lung injury induced by MRSA in vivo. These results support the potential utility of Tys as a novel ARDS therapeutic strategy.
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Affiliation(s)
- Lichun Wang
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Eleftheria Letsiou
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Huashan Wang
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Patrick Belvitch
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Lucille N. Meliton
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Mary E. Brown
- 2Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Mounica Bandela
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Jiwang Chen
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | | | - Steven M. Dudek
- 1Division of Pulmonary, Critical Care, Sleep and Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois
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Rho-Proteins and Downstream Pathways as Potential Targets in Sepsis and Septic Shock: What Have We Learned from Basic Research. Cells 2021; 10:cells10081844. [PMID: 34440613 PMCID: PMC8391638 DOI: 10.3390/cells10081844] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 01/19/2023] Open
Abstract
Sepsis and septic shock are associated with acute and sustained impairment in the function of the cardiovascular system, kidneys, lungs, liver, and brain, among others. Despite the significant advances in prevention and treatment, sepsis and septic shock sepsis remain global health problems with elevated mortality rates. Rho proteins can interact with a considerable number of targets, directly affecting cellular contractility, actin filament assembly and growing, cell motility and migration, cytoskeleton rearrangement, and actin polymerization, physiological functions that are intensively impaired during inflammatory conditions, such as the one that occurs in sepsis. In the last few decades, Rho proteins and their downstream pathways have been investigated in sepsis-associated experimental models. The most frequently used experimental design included the exposure to bacterial lipopolysaccharide (LPS), in both in vitro and in vivo approaches, but experiments using the cecal ligation and puncture (CLP) model of sepsis have also been performed. The findings described in this review indicate that Rho proteins, mainly RhoA and Rac1, are associated with the development of crucial sepsis-associated dysfunction in different systems and cells, including the endothelium, vessels, and heart. Notably, the data found in the literature suggest that either the inhibition or activation of Rho proteins and associated pathways might be desirable in sepsis and septic shock, accordingly with the cellular system evaluated. This review included the main findings, relevance, and limitations of the current knowledge connecting Rho proteins and sepsis-associated experimental models.
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Zou L, Yu Q, Zhang L, Yuan X, Fang F, Xu F. Identification of inflammation related lncRNAs and Gm33647 as a potential regulator in septic acute lung injury. Life Sci 2021; 282:119814. [PMID: 34298039 DOI: 10.1016/j.lfs.2021.119814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 07/01/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
Sepsis is commonly complicated by acute lung injury (ALI). We aimed to determine the long non-coding RNAs (lncRNAs) and mRNAs expression profiles. Septic acute lung injury mouse model was established by cecal ligation and puncture. LPS was applied to induce inflammation in mouse alveolar macrophages (MH-s). Besides, LPS/Nigericin sodium salt was used to activate inflammasome in MH-s. LncRNA and mRNA profiles were detected using an Agilent microarray and identified by qPCR. Bioinformatic analyses were employed to analyze the expression profiles and multiple biological functions. Inflammation-related mRNAs were selected according to KEGG pathways and GO terms including inflammation response, immune response and cytokine activity. A network of inflammation related mRNAs and co-expressed lncRNAs was conducted. Finally, Gm33647 was identified as potential regulator in septic acute lung injury. Gm33647 was knock-downed via siRNA to explore functions. The results showed 353 differentially expressed lncRNAs and 3116 differentially expressed mRNAs were identified. Co-expression networks of lncRNA-mRNA showed Gm33647 was a hub gene. Cis- and trans-regulation analyses revealed Gm41442, Gm38850 and Gm36841 could function as a network in septic ALI. LncRNA Gm33647 was reduced by LPS and increased by inflammasome activation in MH-s. Silencing Gm33647 up-regulated IL-6, IL10 and TNF-α in MH-s. When inflammasome was activated by LPS/Nigericin sodium salt, IL-1β, IL-18 and Caspase 1 were increased by silencing Gm33647 in MH-s. These results identified inflammation related lncRNAs and Gm33647 as potential regulators in septic ALI.
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Affiliation(s)
- Liying Zou
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Qing Yu
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Luyun Zhang
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Xiu Yuan
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Fang Fang
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China
| | - Feng Xu
- Department of Critical Care Medicine, Ministry of Education Key Laboratory of Child Development and Disorders, National Clinical Research Center for Child Health and Disorders (Chongqing), China International Science and Technology Cooperation Base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, PR China.
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Karki P, Birukov KG. Rho and Reactive Oxygen Species at Crossroads of Endothelial Permeability and Inflammation. Antioxid Redox Signal 2019; 31:1009-1022. [PMID: 31126187 PMCID: PMC6765062 DOI: 10.1089/ars.2019.7798] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Significance: Increased endothelial permeability and inflammation are two major hallmarks of the life-threatening conditions such as acute respiratory distress syndrome and sepsis. There is a growing consensus in the field that the Rho family of small guanosine triphosphates are critical regulators of endothelial function at both physiological and pathological states. A basal level of reactive oxygen species (ROS) is essential for maintaining metabolic homeostasis, vascular tone, and angiogenesis; however, excessive ROS generation impairs endothelial function and promotes lung inflammation. In this review, we will focus on the role of Rho in control of endothelial function and also briefly discuss a nexus between ROS generation and Rho activation during endothelial dysfunction. Recent Advances: Extensive studies in the past decades have established that a wide range of barrier-disruptive and proinflammatory agonists activate the Rho pathway that, ultimately, leads to endothelial dysfunction via disruption of endothelial barrier and further escalation of inflammation. An increasing body of evidence suggests that a bidirectional interplay exists between the Rho pathway and ROS generation during endothelial dysfunction. Rac, a member of the Rho family, is directly involved in ROS production and ROS, in turn, activate RhoA, Rac, and Cdc42. Critical Issues: A precise mechanism of interaction between ROS generation and Rho activation and its impact on endothelial function needs to be elucidated. Future Directions: By employing advanced molecular techniques, the sequential cascades in the Rho-ROS crosstalk signaling axis need to be explored. The therapeutic potential of the Rho pathway inhibitors in endothelial-dysfunction associated cardiopulmonary disorders needs to be evaluated.
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Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland, Baltimore, Maryland
| | - Konstantin G Birukov
- Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland
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Karki P, Ke Y, Tian Y, Ohmura T, Sitikov A, Sarich N, Montgomery CP, Birukova AA. Staphylococcus aureus-induced endothelial permeability and inflammation are mediated by microtubule destabilization. J Biol Chem 2019; 294:3369-3384. [PMID: 30622143 DOI: 10.1074/jbc.ra118.004030] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 12/13/2018] [Indexed: 12/18/2022] Open
Abstract
Staphylococcus aureus is a major etiological agent of sepsis and induces endothelial cell (EC) barrier dysfunction and inflammation, two major hallmarks of acute lung injury. However, the molecular mechanisms of bacterial pathogen-induced EC barrier disruption are incompletely understood. Here, we investigated the role of microtubules (MT) in the mechanisms of EC barrier compromise caused by heat-killed S. aureus (HKSA). Using a customized monolayer permeability assay in human pulmonary EC and MT fractionation, we observed that HKSA-induced barrier disruption is accompanied by MT destabilization and increased histone deacetylase-6 (HDAC6) activity resulting from elevated reactive oxygen species (ROS) production. Molecular or pharmacological HDAC6 inhibition rescued barrier function in HKSA-challenged vascular endothelium. The HKSA-induced EC permeability was associated with impaired MT-mediated delivery of cytoplasmic linker-associated protein 2 (CLASP2) to the cell periphery, limiting its interaction with adherens junction proteins. HKSA-induced EC barrier dysfunction was also associated with increased Rho GTPase activity via activation of MT-bound Rho-specific guanine nucleotide exchange factor-H1 (GEF-H1) and was abolished by HDAC6 down-regulation. HKSA activated the NF-κB proinflammatory pathway and increased the expression of intercellular and vascular cell adhesion molecules in EC, an effect that was also HDAC6-dependent and mediated, at least in part, by a GEF-H1/Rho-dependent mechanism. Of note, HDAC6 knockout mice or HDAC6 inhibitor-treated WT mice were partially protected from vascular leakage and inflammation caused by both HKSA or methicillin-resistant S. aureus (MRSA). Our results indicate that S. aureus-induced, ROS-dependent up-regulation of HDAC6 activity destabilizes MT and thereby activates the GEF-H1/Rho pathway, increasing both EC permeability and inflammation.
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Affiliation(s)
- Pratap Karki
- From the Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland 21201
| | - Yunbo Ke
- the Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland 21201
| | - Yufeng Tian
- the Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois 60637, and
| | - Tomomi Ohmura
- the Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois 60637, and
| | - Albert Sitikov
- the Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois 60637, and
| | - Nicolene Sarich
- the Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois 60637, and
| | - Christopher P Montgomery
- the Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois 60637, and.,the Department of Critical Care Medicine, Nationwide Children's Hospital, Columbus, Ohio 43205
| | - Anna A Birukova
- From the Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland School of Medicine, Baltimore, Maryland 21201,
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Karki P, Birukova AA. Substrate stiffness-dependent exacerbation of endothelial permeability and inflammation: mechanisms and potential implications in ALI and PH (2017 Grover Conference Series). Pulm Circ 2018; 8:2045894018773044. [PMID: 29714090 PMCID: PMC5987909 DOI: 10.1177/2045894018773044] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The maintenance of endothelial barrier integrity is absolutely essential to prevent the vascular leak associated with pneumonia, pulmonary edema resulting from inhalation of toxins, acute elevation to high altitude, traumatic and septic lung injury, acute lung injury (ALI), and its life-threatening complication, acute respiratory distress syndrome (ARDS). In addition to the long-known edemagenic and inflammatory agonists, emerging evidences suggest that factors of endothelial cell (EC) mechanical microenvironment such as blood flow, mechanical strain of the vessel, or extracellular matrix stiffness also play an essential role in the control of endothelial permeability and inflammation. Recent studies from our group and others have demonstrated that substrate stiffening causes endothelial barrier disruption and renders EC more susceptible to agonist-induced cytoskeletal rearrangement and inflammation. Further in vivo studies have provided direct evidence that proinflammatory stimuli increase lung microvascular stiffness which in turn exacerbates endothelial permeability and inflammation and perpetuates a vicious circle of lung inflammation. Accumulating evidence suggests a key role for RhoA GTPases signaling in stiffness-dependent mechanotransduction mechanisms defining EC permeability and inflammatory responses. Vascular stiffening is also known to be a key contributor to other cardiovascular diseases such as arterial pulmonary hypertension (PH), although the precise role of stiffness in the development and progression of PH remains to be elucidated. This review summarizes the current understanding of stiffness-dependent regulation of pulmonary EC permeability and inflammation, and discusses potential implication of pulmonary vascular stiffness alterations at macro- and microscale in development and modulation of ALI and PH.
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Affiliation(s)
- Pratap Karki
- 12264 Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Anna A Birukova
- 12264 Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
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Sreter KB, Budimir I, Golub A, Dorosulić Z, Sabol Pušić M, Boban M. Changes in pulmonary artery systolic pressure correlate with radiographic severity and peripheral oxygenation in adults with community-acquired pneumonia. JOURNAL OF CLINICAL ULTRASOUND : JCU 2018; 46:41-47. [PMID: 28940421 DOI: 10.1002/jcu.22523] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 06/01/2017] [Accepted: 06/29/2017] [Indexed: 06/07/2023]
Abstract
PURPOSE The aim of this prospective observational study was to evaluate the relationship between changes in pulmonary artery systolic pressure (ΔPASP) and both severity of community-acquired pneumonia (CAP) and changes in peripheral blood oxygen partial pressure (PaO2 ). MATERIALS AND METHODS Seventy-five consecutive adult patients hospitalized for treatment of CAP were recruited in this single-center cohort study. Doppler echocardiographic measurement of PASP was performed by 2 staff cardiologists. Follow-up assessment was performed within 2 to 4 weeks of ending antibiotic treatment at radiographic resolution of CAP. Fifteen patients were excluded during follow-up due to confirmation of chronic obstructive pulmonary disease. RESULTS Pneumonia was unilateral in 40 (66.7%) and bilateral in 20 (33.3%) patients. Radiographic extent of pneumonia involved 2 pulmonary segments in 31 patients (51.7%), 3 to 5 pulmonary segments in 25 (41.7%), and 6 pulmonary segments in 4 patients (6.6%). ΔPASP between hospital admission and follow-up correlated with the number of pulmonary segments involved (Rho = 0.953; P < .001) and PaO2 (Rho = -0.667; P < .001). The maximum PASP was greater during pneumonia than after resolution (34.82 ± 3.96 vs. 22.67 ± 4.04, P < .001). CONCLUSIONS Changes in PASP strongly correlated with radiological severity of CAP and PaO2 . During pneumonia, PASP appeared increased without significant change in left ventricular filling pressures. This suggests that disease-related changes in lung tissue caused by pneumonia may easily and reproducibly be assessed using conventional noninvasive bedside diagnostics such as echocardiography and arterial blood gas analysis.
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Affiliation(s)
- Katherina Bernadette Sreter
- Department of Clinical Immunology, Pulmonology and Rheumatology, University Hospital Centre "Sestre Milosrdnice", Zagreb, Croatia
| | - Ivan Budimir
- Department of Gastroenterology, University Hospital Centre "Sestre Milosrdnice", Zagreb, Croatia
| | - Andrija Golub
- Hospital for Lung Diseases and Tuberculosis "Klenovnik", Klenovnik, Croatia
| | - Zdravko Dorosulić
- Department of Gastroenterology, University Hospital Centre "Sestre Milosrdnice", Zagreb, Croatia
| | | | - Marko Boban
- Department of Cardiology, University Hospital "Thalassotherapia Opatija", Opatija, Croatia
- Department of Internal Medicine, Medical Faculty, University of Rijeka, Rijeka, Croatia
- Department of Internal Medicine, Medical Faculty "J.J. Strossmayer", University of Osijek, Croatia
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Ye Y, Li SL, Ma YY, Diao YJ, Yang L, Su MQ, Li Z, Ji Y, Wang J, Lei L, Fan WX, Li LX, Xu Y, Hao XK. Exosomal miR-141-3p regulates osteoblast activity to promote the osteoblastic metastasis of prostate cancer. Oncotarget 2017; 8:94834-94849. [PMID: 29212270 PMCID: PMC5706916 DOI: 10.18632/oncotarget.22014] [Citation(s) in RCA: 102] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 09/05/2017] [Indexed: 12/26/2022] Open
Abstract
Exosomes from cancer cells, which contain microRNA and reach metastasis loci prior to cancer cells, stimulate the formation of a metastatic microenvironment. Previous studies have shown that exosomal miR-141-3p is associated with metastatic prostate cancer (PCa). However, the role and regulatory mechanism of miR-141-3p in the microenvironment of bone metastases require further study. In this study, we performed a series of experiments in vivo and in vitro to determine whether exosomal miR-141-3p from MDA PCa 2b cells regulates osteoblast activity to promote osteoblastic metastasis. We demonstrate that extracts obtained from cell culture supernatants contained exosomes and that miR-141-3p levels were significantly higher in MDA PCa 2b cell exosomes. Via confocal imaging, numerous MDA PCa 2b exosomes were observed to enter osteoblasts, and miR-141-3p was transferred to osteoblasts through MDA PCa 2b exosomes in vitro. Exosomal miR-141-3p from MDA PCa 2b promoted osteoblast activity and increased osteoprotegerin OPG expression. miR-141-3p suppressed the protein levels of the target gene DLC1, indicating its functional significance in activating the p38MAPK pathway. In animal experiments, exosomal miR-141-3p had bone-target specificity and promoted osteoblast activity. Mice injected with miR-141-3p-mimics exosomes developed apparent osteoblastic bone metastasis. Exosomal miR-141-3p from MDA PCa 2b cells promoted osteoblast activity and regulated the microenvironment of bone metastases, which plays an important role in the formation of bone metastases and osteogenesis damage in PCa. Clarifying the specific mechanism of bone metastasis will help generate new possibilities for the treatment of PCa.
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Affiliation(s)
- Yun Ye
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China.,Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, China
| | - Su-Liang Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, China
| | - Yue-Yun Ma
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yan-Jun Diao
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Liu Yang
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Ming-Quan Su
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Zhuo Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, China
| | - Yang Ji
- Department of Radiology, The First Affiliated Hospital of Xi'an Medical University, Xi'an, Shaanxi 710077, China
| | - Juan Wang
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Lin Lei
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Wei-Xiao Fan
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - La-Xiu Li
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Yi Xu
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Xiao-Ke Hao
- Department of Laboratory Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
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Holvoet T, Devriese S, Castermans K, Boland S, Leysen D, Vandewynckel YP, Devisscher L, Van den Bossche L, Van Welden S, Dullaers M, Vandenbroucke RE, De Rycke R, Geboes K, Bourin A, Defert O, Hindryckx P, De Vos M, Laukens D. Treatment of Intestinal Fibrosis in Experimental Inflammatory Bowel Disease by the Pleiotropic Actions of a Local Rho Kinase Inhibitor. Gastroenterology 2017. [PMID: 28642198 DOI: 10.1053/j.gastro.2017.06.013] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND Intestinal fibrosis resulting in (sub)obstruction is a common complication of Crohn's disease (CD). Rho kinases (ROCKs) play multiple roles in TGFβ-induced myofibroblast activation that could be therapeutic targets. Because systemic ROCK inhibition causes cardiovascular side effects, we evaluated the effects of a locally acting ROCK inhibitor (AMA0825) on intestinal fibrosis. METHODS Fibrosis was assessed in mouse models using dextran sulfate sodium (DSS) and adoptive T-cell transfer. The in vitro and ex vivo effects of AMA0825 were studied in different cell types and in CD biopsy cultures. RESULTS ROCK is expressed in fibroblastic, epithelial, endothelial, and muscle cells of the human intestinal tract and is activated in inflamed and fibrotic tissue. Prophylactic treatment with AMA0825 inhibited myofibroblast accumulation, expression of pro-fibrotic factors, and accumulation of fibrotic tissue without affecting clinical disease activity and histologic inflammation in 2 models of fibrosis. ROCK inhibition reversed established fibrosis in a chronic DSS model and impeded ex vivo pro-fibrotic protein secretion from stenotic CD biopsies. AMA0825 reduced TGFβ1-induced activation of myocardin-related transcription factor (MRTF) and p38 mitogen-activated protein kinase (MAPK), down-regulating matrix metalloproteinases, collagen, and IL6 secretion from fibroblasts. In these cells, ROCK inhibition potentiated autophagy, which was required for the observed reduction in collagen and IL6 production. AMA0825 did not affect pro-inflammatory cytokine secretion from other ROCK-positive cell types, corroborating the selective in vivo effect on fibrosis. CONCLUSIONS Local ROCK inhibition prevents and reverses intestinal fibrosis by diminishing MRTF and p38 MAPK activation and increasing autophagy in fibroblasts. Overall, our results show that local ROCK inhibition is promising for counteracting fibrosis as an add-on therapy for CD.
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Affiliation(s)
- Tom Holvoet
- Department of Gastroenterology, Ghent University, Ghent, Belgium
| | - Sarah Devriese
- Department of Gastroenterology, Ghent University, Ghent, Belgium
| | | | | | | | | | | | | | | | - Melissa Dullaers
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Pulmonary Medicine, Ghent University, Ghent, Belgium
| | - Roosmarijn E Vandenbroucke
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Molecular Biomedical Research, Ghent University, Ghent, Belgium
| | - Riet De Rycke
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Molecular Biomedical Research, Ghent University, Ghent, Belgium
| | - Karel Geboes
- Department of Pathology, Ghent University, Ghent, Belgium
| | | | | | - Pieter Hindryckx
- Department of Gastroenterology, Ghent University, Ghent, Belgium
| | - Martine De Vos
- Department of Gastroenterology, Ghent University, Ghent, Belgium
| | - Debby Laukens
- Department of Gastroenterology, Ghent University, Ghent, Belgium.
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11
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Oskolkova O, Gawlak G, Tian Y, Ke Y, Sarich N, Son S, Andreasson K, Bochkov VN, Birukova AA, Birukov KG. Prostaglandin E receptor-4 receptor mediates endothelial barrier-enhancing and anti-inflammatory effects of oxidized phospholipids. FASEB J 2017; 31:4187-4202. [PMID: 28572443 DOI: 10.1096/fj.201601232rr] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 05/08/2017] [Indexed: 01/08/2023]
Abstract
Unlike other agonists that cause transient endothelial cell (EC) response, the products of 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine (PAPC) oxidation that contain cyclopenthenone groups, which recapitulate prostaglandin-like structure, cause sustained enhancement of the pulmonary EC barrier. The mechanisms that drive the sustained effects by oxidized PAPC (OxPAPC) remain unexplored. On the basis of the structural similarity of isoprostanoid moieties that are present in full-length oxygenated PAPC species, we used an inhibitory approach to perform the screening of prostanoid receptors as potential candidates that mediate OxPAPC effects. Results show that only prostaglandin E receptor-4 (EP4) was involved and mediated the sustained phase of the barrier-enhancing effects of OxPAPC that are associated with the activation of Rac GTPase and its cytoskeletal targets. EC incubation with OxPAPC also induced EP4 mRNA expression in pulmonary ECs and lung tissue. EP4 knockdown using gene-specific small interfering RNA did not affect the rapid phase of OxPAPC-induced EC barrier enhancement or the protective effects against thrombin-induced EC permeability, but abolished the advanced barrier enhancement phase and suppressed the protective effects of OxPAPC against more sustained EC barrier dysfunction and cell inflammatory response caused by TNF-α. Endothelial-specific knockout of the EP4 receptor in mice attenuated the protective effect of intravenous OxPAPC administration in the model of acute lung injury caused by intratracheal injection of LPS. Taken together, these results demonstrate a novel role for prostaglandin receptor EP4 in the mediation of barrier-enhancing and anti-inflammatory effects caused by oxidized phospholipids.-Oskolkova, O., Gawlak, G., Tian, Y., Ke, Y., Sarich, N., Son, S., Andreasson, K., Bochkov, V. N., Birukova, A. A., Birukov, K. G. Prostaglandin E receptor-4 receptor mediates endothelial barrier-enhancing and anti-inflammatory effects of oxidized phospholipids.
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Affiliation(s)
- Olga Oskolkova
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Grzegorz Gawlak
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Yufeng Tian
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Yunbo Ke
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Nicolene Sarich
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Sophia Son
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Katrin Andreasson
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California, USA
| | - Valery N Bochkov
- Department of Pharmaceutical Chemistry, University of Graz, Graz, Austria
| | - Anna A Birukova
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA
| | - Konstantin G Birukov
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois, USA;
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12
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Escue R, Kandasamy K, Parthasarathi K. Thrombin Induces Inositol Trisphosphate-Mediated Spatially Extensive Responses in Lung Microvessels. THE AMERICAN JOURNAL OF PATHOLOGY 2017; 187:921-935. [PMID: 28188112 DOI: 10.1016/j.ajpath.2016.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 12/09/2016] [Accepted: 12/20/2016] [Indexed: 12/20/2022]
Abstract
Activation of plasma membrane receptors initiates compartmentalized second messenger signaling. Whether this compartmentalization facilitates the preferential intercellular diffusion of specific second messengers is unclear. Toward this, the receptor-mediated agonist, thrombin, was instilled into microvessels in a restricted region of isolated blood-perfused mouse lungs. Subsequently, the thrombin-induced increase in endothelial F-actin was determined using confocal fluorescence microscopy. Increased F-actin was evident in microvessels directly treated with thrombin and in those located in adjoining thrombin-free regions. This increase was abrogated by inhibiting inositol trisphosphate-mediated calcium release with Xestospongin C (XeC). XeC also inhibited the thrombin-induced increase in the amplitude of endothelial cytosolic Ca2+ oscillations. Instillation of thrombin and XeC into adjacent restricted regions increased F-actin in microvessels in the thrombin-treated and adjacent regions but not in those in the XeC-treated region. Thus, inositol trisphosphate, and not calcium, diffused interendothelially to the spatially remote thrombin-free microvessels. Thus, activation of plasma membrane receptors increased the ambit of inflammatory responses via a second messenger different from that used by stimuli that induce cell-wide increases in second messengers. Thrombin however failed to induce the spatially extensive response in microvessels of mice lacking endothelial connexin43, suggesting a role for connexin43 gap junctions. Compartmental second messenger signaling and interendothelial communication define the specific second messenger involved in exacerbating proinflammatory responses to receptor-mediated agonists.
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Affiliation(s)
- Rachel Escue
- Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee
| | - Kathirvel Kandasamy
- Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee
| | - Kaushik Parthasarathi
- Department of Physiology, The University of Tennessee Health Science Center, Memphis, Tennessee.
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13
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Schweitzer KS, Chen SX, Law S, Van Demark M, Poirier C, Justice MJ, Hubbard WC, Kim ES, Lai X, Wang M, Kranz WD, Carroll CJ, Ray BD, Bittman R, Goodpaster J, Petrache I. Endothelial disruptive proinflammatory effects of nicotine and e-cigarette vapor exposures. Am J Physiol Lung Cell Mol Physiol 2015; 309:L175-87. [PMID: 25979079 DOI: 10.1152/ajplung.00411.2014] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 05/04/2015] [Indexed: 11/22/2022] Open
Abstract
The increased use of inhaled nicotine via e-cigarettes has unknown risks to lung health. Having previously shown that cigarette smoke (CS) extract disrupts the lung microvasculature barrier function by endothelial cell activation and cytoskeletal rearrangement, we investigated the contribution of nicotine in CS or e-cigarettes (e-Cig) to lung endothelial injury. Primary lung microvascular endothelial cells were exposed to nicotine, e-Cig solution, or condensed e-Cig vapor (1-20 mM nicotine) or to nicotine-free CS extract or e-Cig solutions. Compared with nicotine-containing extract, nicotine free-CS extract (10-20%) caused significantly less endothelial permeability as measured with electric cell-substrate impedance sensing. Nicotine exposures triggered dose-dependent loss of endothelial barrier in cultured cell monolayers and rapidly increased lung inflammation and oxidative stress in mice. The endothelial barrier disruptive effects were associated with increased intracellular ceramides, p38 MAPK activation, and myosin light chain (MLC) phosphorylation, and was critically mediated by Rho-activated kinase via inhibition of MLC-phosphatase unit MYPT1. Although nicotine at sufficient concentrations to cause endothelial barrier loss did not trigger cell necrosis, it markedly inhibited cell proliferation. Augmentation of sphingosine-1-phosphate (S1P) signaling via S1P1 improved both endothelial cell proliferation and barrier function during nicotine exposures. Nicotine-independent effects of e-Cig solutions were noted, which may be attributable to acrolein, detected along with propylene glycol, glycerol, and nicotine by NMR, mass spectrometry, and gas chromatography, in both e-Cig solutions and vapor. These results suggest that soluble components of e-Cig, including nicotine, cause dose-dependent loss of lung endothelial barrier function, which is associated with oxidative stress and brisk inflammation.
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Affiliation(s)
- Kelly S Schweitzer
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Steven X Chen
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Sarah Law
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Mary Van Demark
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Christophe Poirier
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Matthew J Justice
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Walter C Hubbard
- Department of Clinical Pharmacology, The Johns Hopkins University, Baltimore, Maryland
| | - Elena S Kim
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana
| | - Xianyin Lai
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Mu Wang
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana
| | - William D Kranz
- Department of Chemistry and Chemical Biology; Indiana University-Purdue University, Indianapolis, Indiana
| | - Clinton J Carroll
- Department of Chemistry and Chemical Biology; Indiana University-Purdue University, Indianapolis, Indiana
| | - Bruce D Ray
- Department of Physics, Indiana University-Purdue University, Indianapolis, Indiana
| | - Robert Bittman
- Queens College, City University of New York, Flushing, New York; and
| | - John Goodpaster
- Department of Chemistry and Chemical Biology; Indiana University-Purdue University, Indianapolis, Indiana
| | - Irina Petrache
- Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana; Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, Indiana; Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis, Indiana
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14
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Kása A, Csortos C, Verin AD. Cytoskeletal mechanisms regulating vascular endothelial barrier function in response to acute lung injury. Tissue Barriers 2015; 3:e974448. [PMID: 25838980 DOI: 10.4161/21688370.2014.974448] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/04/2014] [Indexed: 01/11/2023] Open
Abstract
Endothelial cells (EC) form a semi-permeable barrier between the interior space of blood vessels and the underlying tissues. In acute lung injury (ALI) the EC barrier is weakened leading to increased vascular permeability. It is widely accepted that EC barrier integrity is critically dependent upon intact cytoskeletal structure and cell junctions. Edemagenic agonists, like thrombin or endotoxin lipopolysaccharide (LPS), induced cytoskeletal rearrangement, and EC contractile responses leading to disruption of intercellular contacts and EC permeability increase. The highly clinically-relevant cytoskeletal mechanisms of EC barrier dysfunction are currently under intense investigation and will be described and discussed in the current review.
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Key Words
- AJ, adherens junction
- ALI, Acute Lung Injury
- ARDS, Acute Respiratory Distress Syndrome
- CPI-17, PKC potentiated inhibitory protein of 17 kDa
- CaD, caldesmon
- EC, endothelial cells
- GJ, gap junction
- HSP-27, small heat shock actin-capping protein of 27 kDa
- IL, interleukin
- LPS, lipopolysaccharide
- MLC, myosin light chain
- MLCK, Ca2+/calmodulin (CaM) dependent MLC kinase
- MLCP, myosin light chain phosphatase
- MT, microtubules
- MYPT1, myosin phosphatase targeting subunit 1
- PKA, protein kinase A
- PKC, protein kinase C
- SM, smooth muscle
- TJ, tight junction
- TLR4, toll-like receptor 4
- TNFα, tumor necrosis factor α
- acute lung injury
- barrier function
- cytoskeleton
- endothelial junctions
- pulmonary endothelium
- thrombin
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Affiliation(s)
- Anita Kása
- Vascular Biology Center; Georgia Regents University ; Augusta, GA USA
| | - Csilla Csortos
- Department of Medical Chemistry; Faculty of Medicine; University of Debrecen ; Debrecen, Hungary
| | - Alexander D Verin
- Vascular Biology Center; Georgia Regents University ; Augusta, GA USA ; Division of Pulmonary; Medicine Medical College of Georgia; Georgia Regents University; Augusta, GA USA
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15
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Meng F, Meliton A, Moldobaeva N, Mutlu G, Kawasaki Y, Akiyama T, Birukova AA. Asef mediates HGF protective effects against LPS-induced lung injury and endothelial barrier dysfunction. Am J Physiol Lung Cell Mol Physiol 2014; 308:L452-63. [PMID: 25539852 DOI: 10.1152/ajplung.00170.2014] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Increased vascular endothelial permeability and inflammation are major pathological mechanisms of pulmonary edema and its life-threatening complication, the acute respiratory distress syndrome (ARDS). We have previously described potent protective effects of hepatocyte growth factor (HGF) against thrombin-induced hyperpermeability and identified the Rac pathway as a key mechanism of HGF-mediated endothelial barrier protection. However, anti-inflammatory effects of HGF are less understood. This study examined effects of HGF on the pulmonary endothelial cell (EC) inflammatory activation and barrier dysfunction caused by the gram-negative bacterial pathogen lipopolysaccharide (LPS). We tested involvement of the novel Rac-specific guanine nucleotide exchange factor Asef in the HGF anti-inflammatory effects. HGF protected the pulmonary EC monolayer against LPS-induced hyperpermeability, disruption of monolayer integrity, activation of NF-kB signaling, expression of adhesion molecules intercellular adhesion molecule-1 and vascular cell adhesion molecule-1, and production of IL-8. These effects were critically dependent on Asef. Small-interfering RNA-induced downregulation of Asef attenuated HGF protective effects against LPS-induced EC barrier failure. Protective effects of HGF against LPS-induced lung inflammation and vascular leak were also diminished in Asef knockout mice. Taken together, these results demonstrate potent anti-inflammatory effects by HGF and delineate a key role of Asef in the mediation of the HGF barrier protective and anti-inflammatory effects. Modulation of Asef activity may have important implications in therapeutic strategies aimed at the treatment of sepsis and acute lung injury/ARDS-induced gram-negative bacterial pathogens.
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Affiliation(s)
- Fanyong Meng
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Angelo Meliton
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Nurgul Moldobaeva
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Gokhan Mutlu
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
| | - Yoshihiro Kawasaki
- Laboratory of Molecular and Genetic Information, Institute for Molecular and Cellular Biosciences, The University of Tokyo, Tokyo, Japan
| | - Tetsu Akiyama
- Laboratory of Molecular and Genetic Information, Institute for Molecular and Cellular Biosciences, The University of Tokyo, Tokyo, Japan
| | - Anna A Birukova
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, Illinois; and
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16
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Jamaluddin MS, Yan S, Lü J, Liang Z, Yao Q, Chen C. Resistin increases monolayer permeability of human coronary artery endothelial cells. PLoS One 2013; 8:e84576. [PMID: 24386395 PMCID: PMC3874001 DOI: 10.1371/journal.pone.0084576] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2013] [Accepted: 11/24/2013] [Indexed: 01/14/2023] Open
Abstract
Resistin has been linked to obesity, insulin resistance, atherosclerosis, and the development of cardiovascular disease. Nevertheless, the effects and the molecular mechanisms of resistin on endothelial permeability, a key event in the development of atherosclerosis, inflammation, and vascular disease, are largely unknown. In order to determine the effect of resistin on endothelial permeability, human coronary artery endothelial cells (HCAECs) were treated with clinically relevant concentrations of resistin and the endothelial permeability was measured using the Transwell system with a Texas-Red-labeled dextran tracer. The permeability of HCAEC monolayers treated with resistin (80 ng/mL) was 51% higher than the permeability of control monolayers (P<0.05). The mRNA levels of tight junction proteins zonula occludens-1 (ZO-1) and occludin in resistin-treated cells were 37% and 42% lower, respectively, than the corresponding levels in untreated cells. The protein levels of these molecules in resistin-treated cells were significantly reduced by 35% and 37%, respectively (P<0.05), as shown by flow cytometry and Western blot analysis. Superoxide dismutase (SOD) mimetic MnTBAP effectively blocked the resistin-mediated reduction of ZO-1 and occludin levels in HCAECs. In addition, superoxide anion production was increased from 21% (untreated cells) to 55% (cells treated with 40 ng/mL resistin), and 64% (resistin, 80 mg/mL) (P<0.05). The natural antioxidant Ginkgolide A effectively inhibited resistin-induced increase in permeability and the increase in superoxide anion production in HCAECs. Furthermore, resistin treatment significantly activated p38 MAPK, but not ERK1/2. Pretreatment of HCAECs with a p38 inhibitor effectively blocked resistin-induced permeability. These results provide new evidence that resistin may contribute to the vascular lesion formation via increasing endothelial permeability through the mechanism of oxidative stress and the activation of p38 MAPK.
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Affiliation(s)
- Md Saha Jamaluddin
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
| | - Shaoyu Yan
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
| | - Jianming Lü
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
| | - Zhengdong Liang
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
| | - Qizhi Yao
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
| | - Changyi Chen
- Molecular Surgeon Research Center, Division of Surgical Research, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of American
- * E-mail:
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