1
|
Wakasugi R, Suzuki K, Kaneko-Kawano T. Molecular Mechanisms Regulating Vascular Endothelial Permeability. Int J Mol Sci 2024; 25:6415. [PMID: 38928121 DOI: 10.3390/ijms25126415] [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: 04/30/2024] [Revised: 05/30/2024] [Accepted: 06/02/2024] [Indexed: 06/28/2024] Open
Abstract
Vascular endothelial cells form a monolayer in the vascular lumen and act as a selective barrier to control the permeability between blood and tissues. To maintain homeostasis, the endothelial barrier function must be strictly integrated. During acute inflammation, vascular permeability temporarily increases, allowing intravascular fluid, cells, and other components to permeate tissues. Moreover, it has been suggested that the dysregulation of endothelial cell permeability may cause several diseases, including edema, cancer, and atherosclerosis. Here, we reviewed the molecular mechanisms by which endothelial cells regulate the barrier function and physiological permeability.
Collapse
Affiliation(s)
- Rio Wakasugi
- Graduate School of Pharmacy, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu 525-8577, Shiga, Japan
| | - Kenji Suzuki
- Graduate School of Pharmacy, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu 525-8577, Shiga, Japan
| | - Takako Kaneko-Kawano
- Graduate School of Pharmacy, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu 525-8577, Shiga, Japan
| |
Collapse
|
2
|
Malavige GN, Ogg GS. Molecular mechanisms in the pathogenesis of dengue infections. Trends Mol Med 2024; 30:484-498. [PMID: 38582622 DOI: 10.1016/j.molmed.2024.03.006] [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: 01/01/2024] [Revised: 03/12/2024] [Accepted: 03/13/2024] [Indexed: 04/08/2024]
Abstract
Dengue is the most rapidly emerging climate-sensitive infection, and morbidity/mortality and disease incidence are rising markedly, leading to healthcare systems being overwhelmed. There are currently no specific treatments for dengue or prognostic markers to identify those who will progress to severe disease. Owing to an increase in the burden of illness and a change in epidemiology, many patients experience severe disease. Our limited understanding of the complex mechanisms of disease pathogenesis has significantly hampered the development of safe and effective treatments, vaccines, and biomarkers. We discuss the molecular mechanisms of dengue pathogenesis, the gaps in our knowledge, and recent advances, as well as the most crucial questions to be answered to enable the development of therapeutics, biomarkers, and vaccines.
Collapse
Affiliation(s)
- Gathsaurie Neelika Malavige
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Lanka; Medical Research Council (MRC) Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK.
| | - Graham S Ogg
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Lanka; Medical Research Council (MRC) Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| |
Collapse
|
3
|
Anitua E, Muruzabal F, de la Fuente M, Del Olmo-Aguado S, Alkhraisat MH, Merayo-Lloves J. PRGF Membrane with Tailored Optical Properties Preserves the Cytoprotective Effect of Plasma Rich in Growth Factors: In Vitro Model of Retinal Pigment Epithelial Cells. Int J Mol Sci 2023; 24:11195. [PMID: 37446374 DOI: 10.3390/ijms241311195] [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: 05/31/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023] Open
Abstract
The present study evaluates the ability of a novel plasma rich in growth factors (PRGF) membrane with improved optical properties to reduce oxidative stress in retinal pigment epithelial cells (ARPE-19 cells) exposed to blue light. PRGF was obtained from three healthy donors and divided into four main groups: (i) PRGF membrane (M-PRGF), (ii) PRGF supernatant (S-PRGF), (iii) platelet-poor plasma (PPP) membrane diluted 50% with S-PRGF (M-PPP 50%), and (iv) M-PPP 50% supernatant (S-PPP 50%). ARPE-19 cells were exposed to blue light and then incubated with the different PRGF-derived formulations or control for 24 and 48 h under blue light exposure. Mitochondrial and cell viability, reactive oxygen species (ROS) production, and heme oxygenase-1 (HO-1) and ZO-1 expression were evaluated. Mitochondrial viability and cell survival were significantly increased after treatment with the different PRGF-derived formulations. ROS synthesis and HO-1 expression were significantly reduced after cell treatment with any of the PRGF-derived formulations. Furthermore, the different PRGF-derived formulations significantly increased ZO-1 expression in ARPE-19 exposed to blue light. The new PRGF membrane with improved optical properties and its supernatant (M-PPP 50% and S-PPP 50%) protected and reversed blue light-induced oxidative stress in ARPE-19 cells at levels like those of a natural PRGF membrane and its supernatant.
Collapse
Affiliation(s)
- Eduardo Anitua
- BTI-Biotechnology Institute, 01007 Vitoria, Spain
- University Institute for Regenerative Medicine and Oral Implantology-UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Francisco Muruzabal
- BTI-Biotechnology Institute, 01007 Vitoria, Spain
- University Institute for Regenerative Medicine and Oral Implantology-UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - María de la Fuente
- BTI-Biotechnology Institute, 01007 Vitoria, Spain
- University Institute for Regenerative Medicine and Oral Implantology-UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Susana Del Olmo-Aguado
- Fundación de Investigación Oftalmológica, Instituto Oftalmológico Fernández-Vega, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
| | - Mohammad H Alkhraisat
- BTI-Biotechnology Institute, 01007 Vitoria, Spain
- University Institute for Regenerative Medicine and Oral Implantology-UIRMI (UPV/EHU-Fundación Eduardo Anitua), 01007 Vitoria, Spain
| | - Jesús Merayo-Lloves
- Fundación de Investigación Oftalmológica, Instituto Oftalmológico Fernández-Vega, 33012 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
| |
Collapse
|
4
|
Calcium-dependent cAMP mediates the mechanoresponsive behaviour of endothelial cells to high-frequency nanomechanostimulation. Biomaterials 2023; 292:121866. [PMID: 36526351 DOI: 10.1016/j.biomaterials.2022.121866] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 09/10/2022] [Accepted: 10/18/2022] [Indexed: 12/15/2022]
Abstract
The endothelial junction plays a central role in regulating intravascular and interstitial tissue permeability. The ability to manipulate its integrity therefore not only facilitates an improved understanding of its underlying molecular mechanisms but also provides insight into potential therapeutic solutions. Herein, we explore the effects of short-duration nanometer-amplitude MHz-order mechanostimulation on interendothelial junction stability and hence the barrier capacity of endothelial monolayers. Following an initial transient in which the endothelial barrier is permeabilised due to Rho-ROCK-activated actin stress fibre formation and junction disruption typical of a cell's response to insults, we observe, quite uniquely, the integrity of the endothelial barrier to not only spontaneously recover but also to be enhanced considerably-without the need for additional stimuli or intervention. Central to this peculiar biphasic response, which has not been observed with other stimuli to date, is the role of second messenger calcium and cyclic adenosine monophosphate (cAMP) signalling. We show that intracellular Ca2+, modulated by the high frequency excitation, is responsible for activating reorganisation of the actin cytoskeleton in the barrier recovery phase, in which circumferential actin bundles are formed to stabilise the adherens junctions via a cAMP-mediated Epac1-Rap1 pathway. Despite the short-duration stimulation (8 min), the approximate 4-fold enhancement in the transendothelial electrical resistance (TEER) of endothelial cells from different tissue sources, and the corresponding reduction in paracellular permeability, was found to persist over hours. The effect can further be extended through multiple treatments without resulting in hyperpermeabilisation of the barrier, as found with prolonged use of chemical stimuli, through which only 1.1- to 1.2-fold improvement in TEER has been reported. Such an ability to regulate and enhance endothelial barrier capacity is particularly useful in the development of in vitro barrier models that more closely resemble their in vivo counterparts.
Collapse
|
5
|
McEvoy E, Sneh T, Moeendarbary E, Javanmardi Y, Efimova N, Yang C, Marino-Bravante GE, Chen X, Escribano J, Spill F, Garcia-Aznar JM, Weeraratna AT, Svitkina TM, Kamm RD, Shenoy VB. Feedback between mechanosensitive signaling and active forces governs endothelial junction integrity. Nat Commun 2022; 13:7089. [PMID: 36402771 PMCID: PMC9675837 DOI: 10.1038/s41467-022-34701-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 11/03/2022] [Indexed: 11/21/2022] Open
Abstract
The formation and recovery of gaps in the vascular endothelium governs a wide range of physiological and pathological phenomena, from angiogenesis to tumor cell extravasation. However, the interplay between the mechanical and signaling processes that drive dynamic behavior in vascular endothelial cells is not well understood. In this study, we propose a chemo-mechanical model to investigate the regulation of endothelial junctions as dependent on the feedback between actomyosin contractility, VE-cadherin bond turnover, and actin polymerization, which mediate the forces exerted on the cell-cell interface. Simulations reveal that active cell tension can stabilize cadherin bonds, but excessive RhoA signaling can drive bond dissociation and junction failure. While actin polymerization aids gap closure, high levels of Rac1 can induce junction weakening. Combining the modeling framework with experiments, our model predicts the influence of pharmacological treatments on the junction state and identifies that a critical balance between RhoA and Rac1 expression is required to maintain junction stability. Our proposed framework can help guide the development of therapeutics that target the Rho family of GTPases and downstream active mechanical processes.
Collapse
Affiliation(s)
- Eoin McEvoy
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.,Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, 19104, USA.,Biomedical Engineering, University of Galway, Galway, H91 HX31, Ireland
| | - Tal Sneh
- Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, 19104, USA.,Center for Molecular Design and Biomimetics, The Biodesign Institute, Arizona State University, Tempe, AZ, 85287, USA
| | - Emad Moeendarbary
- Department of Mechanical Engineering, University College London, London, WC1E 7JE, UK.,Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Yousef Javanmardi
- Department of Mechanical Engineering, University College London, London, WC1E 7JE, UK
| | - Nadia Efimova
- Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Changsong Yang
- Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Gloria E Marino-Bravante
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, 21205, USA.,Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Xingyu Chen
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.,Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Jorge Escribano
- Department of Mechanical Engineering, University of Zaragoza, Zaragoza, Spain
| | - Fabian Spill
- School of Mathematics, University of Birmingham, Birmingham, B15 2TT, United Kingdom
| | | | - Ashani T Weeraratna
- Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, 21205, USA.,Department of Oncology, Sidney Kimmel Cancer Center, Johns Hopkins School of Medicine, Baltimore, MD, 21205, USA
| | - Tatyana M Svitkina
- Department of Biology, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Roger D Kamm
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Vivek B Shenoy
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA. .,Center for Engineering Mechanobiology, University of Pennsylvania, Philadelphia, PA, 19104, USA.
| |
Collapse
|
6
|
Sazonovs A, Stevens CR, Venkataraman GR, Yuan K, Avila B, Abreu MT, Ahmad T, Allez M, Ananthakrishnan AN, Atzmon G, Baras A, Barrett JC, Barzilai N, Beaugerie L, Beecham A, Bernstein CN, Bitton A, Bokemeyer B, Chan A, Chung D, Cleynen I, Cosnes J, Cutler DJ, Daly A, Damas OM, Datta LW, Dawany N, Devoto M, Dodge S, Ellinghaus E, Fachal L, Farkkila M, Faubion W, Ferreira M, Franchimont D, Gabriel SB, Ge T, Georges M, Gettler K, Giri M, Glaser B, Goerg S, Goyette P, Graham D, Hämäläinen E, Haritunians T, Heap GA, Hiltunen M, Hoeppner M, Horowitz JE, Irving P, Iyer V, Jalas C, Kelsen J, Khalili H, Kirschner BS, Kontula K, Koskela JT, Kugathasan S, Kupcinskas J, Lamb CA, Laudes M, Lévesque C, Levine AP, Lewis JD, Liefferinckx C, Loescher BS, Louis E, Mansfield J, May S, McCauley JL, Mengesha E, Mni M, Moayyedi P, Moran CJ, Newberry RD, O'Charoen S, Okou DT, Oldenburg B, Ostrer H, Palotie A, Paquette J, Pekow J, Peter I, Pierik MJ, Ponsioen CY, Pontikos N, Prescott N, Pulver AE, Rahmouni S, Rice DL, Saavalainen P, Sands B, Sartor RB, Schiff ER, Schreiber S, Schumm LP, Segal AW, Seksik P, Shawky R, Sheikh SZ, Silverberg MS, Simmons A, Skeiceviciene J, Sokol H, Solomonson M, Somineni H, Sun D, Targan S, Turner D, Uhlig HH, van der Meulen AE, Vermeire S, Verstockt S, Voskuil MD, Winter HS, Young J, Duerr RH, Franke A, Brant SR, Cho J, Weersma RK, Parkes M, Xavier RJ, Rivas MA, Rioux JD, McGovern DPB, Huang H, Anderson CA, Daly MJ. Large-scale sequencing identifies multiple genes and rare variants associated with Crohn's disease susceptibility. Nat Genet 2022; 54:1275-1283. [PMID: 36038634 PMCID: PMC9700438 DOI: 10.1038/s41588-022-01156-2] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 07/12/2022] [Indexed: 01/18/2023]
Abstract
Genome-wide association studies (GWASs) have identified hundreds of loci associated with Crohn's disease (CD). However, as with all complex diseases, robust identification of the genes dysregulated by noncoding variants typically driving GWAS discoveries has been challenging. Here, to complement GWASs and better define actionable biological targets, we analyzed sequence data from more than 30,000 patients with CD and 80,000 population controls. We directly implicate ten genes in general onset CD for the first time to our knowledge via association to coding variation, four of which lie within established CD GWAS loci. In nine instances, a single coding variant is significantly associated, and in the tenth, ATG4C, we see additionally a significantly increased burden of very rare coding variants in CD cases. In addition to reiterating the central role of innate and adaptive immune cells as well as autophagy in CD pathogenesis, these newly associated genes highlight the emerging role of mesenchymal cells in the development and maintenance of intestinal inflammation.
Collapse
Affiliation(s)
- Aleksejs Sazonovs
- Genomics of Inflammation and Immunity Group, Human Genetics Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | - Christine R Stevens
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | | | - Kai Yuan
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Brandon Avila
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Maria T Abreu
- Crohn's and Colitis Center, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | | | - Matthieu Allez
- Hopital Saint-Louis, APHP, Universite de Paris, INSERM U1160, Paris, France
| | - Ashwin N Ananthakrishnan
- Division of Gastroenterology, Crohn's and Colitis Center, Massachusetts General Hospital, Boston, MA, USA
| | - Gil Atzmon
- Department for Human Biology, University of Haifa, Haifa, Israel
- Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Aris Baras
- Regeneron Genetics Center, Tarrytown, NY, USA
| | - Jeffrey C Barrett
- Human Genetics Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | - Nir Barzilai
- Departments of Medicine and Genetics, Albert Einstein College of Medicine, Bronx, NY, USA
- The Institute for Aging Research, The Nathan Shock Center of Excellence in the Basic Biology of Aging and the Paul F. Glenn Center for the Biology of Human Aging Research at Albert Einstein College of Medicine of Yeshiva University, Bronx, NY, USA
| | - Laurent Beaugerie
- Gastroenterology Department, Sorbonne Universite, Saint Antoine Hospital, Paris, France
| | - Ashley Beecham
- John P. Hussman Institute for Human Genomics, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
- The Dr. John T. Macdonald Foundation Department of Human Genetics, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | | | - Alain Bitton
- McGill University and McGill University Health Centre, Montreal, Quebec, Canada
| | - Bernd Bokemeyer
- Department of Internal Medicine, University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Andrew Chan
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital, Boston, MA, USA
- Channing Division of Network Medicine, Department of Medicine, Brigham and Womens Hospital, Boston, MA, USA
| | | | | | - Jacques Cosnes
- Professeur Chef de Service chez APHP and Universite Paris-6, Paris, France
| | - David J Cutler
- Department of Human Genetics, Emory University, Atlanta, GA, USA
- Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Allan Daly
- Human Genetics Informatics, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | | | - Lisa W Datta
- Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Noor Dawany
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - Marcella Devoto
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
- University of Rome Sapienza, Rome, Italy
- IRGB - CNR, Cagliari, Italy
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
| | - Sheila Dodge
- Genomics Platform, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Eva Ellinghaus
- Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Laura Fachal
- Genomics of Inflammation and Immunity Group, Human Genetics Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | | | | | | | | | - Stacey B Gabriel
- Genomics Platform, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Tian Ge
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Psychiatric and Neurodevelopmental Genetics Unit, Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
- Center for Precision Psychiatry, Massachusetts General Hospital, Boston, MA, USA
| | | | - Kyle Gettler
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Mamta Giri
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Benjamin Glaser
- Department of Endocrinology and Metabolism, Hadassah Medical Center and Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem, Israel
| | | | - Philippe Goyette
- Research Center Montreal Heart Institute, Montreal, Quebec, Canada
| | - Daniel Graham
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA
| | - Eija Hämäläinen
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Talin Haritunians
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | | | - Mikko Hiltunen
- Institute of Biomedicine, University of Eastern Finland, Kuopio, Finland
| | - Marc Hoeppner
- Christian-Albrechts-University of Kiel, Kiel, Germany
| | | | - Peter Irving
- Department of Gastroenterology, Guys and Saint Thomas Hospital, London, UK
- School of Immunology and Microbial Sciences, Kings College London, London, UK
| | - Vivek Iyer
- Human Genetics Informatics, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | - Chaim Jalas
- Director of Genetic Resources and Services, Center for Rare Jewish Genetic Disorders, Bonei Olam, Brooklyn, NY, USA
| | - Judith Kelsen
- Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA, USA
| | - Hamed Khalili
- Clinical and Translational Epidemiology Unit, Massachusetts General Hospital, Boston, MA, USA
| | - Barbara S Kirschner
- Department of Gastroenterology, University of Chicago Medicine, Chicago, IL, USA
| | - Kimmo Kontula
- Department of Medicine, Helsinki University Hospital, and Research Program for Clinical and Molecular Metabolism, University of Helsinki, Helsinki, Finland
| | - Jukka T Koskela
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Subra Kugathasan
- Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Juozas Kupcinskas
- Department of Gastroenterology and Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Christopher A Lamb
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
- Department of Gastroenterology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | | | - Chloé Lévesque
- Research Center Montreal Heart Institute, Montreal, Quebec, Canada
| | | | - James D Lewis
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, USA
- Crohn's and Colitis Foundation, New York, NY, USA
| | | | - Britt-Sabina Loescher
- Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | | | - John Mansfield
- Translational and Clinical Research Institute, Newcastle University, Newcastle upon Tyne, UK
- Department of Gastroenterology, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Sandra May
- Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Jacob L McCauley
- John P. Hussman Institute for Human Genomics, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
- The Dr. John T. Macdonald Foundation Department of Human Genetics, Leonard M. Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Emebet Mengesha
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Myriam Mni
- University of Liège, ULG, Liège, Belgium
| | | | | | | | | | - David T Okou
- Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
- Institut National de Sante Publique (INSP), Abidjan, Côte d'Ivoire
| | - Bas Oldenburg
- Department of Gastroenterology and Hepatology, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Harry Ostrer
- Albert Einstein College of Medicine, Bronx, NY, USA
| | - Aarno Palotie
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, University of Helsinki, Helsinki, Finland
- Department of Neurology, Massachusetts General Hospital, Boston, MA, USA
- Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA
| | - Jean Paquette
- Research Center Montreal Heart Institute, Montreal, Quebec, Canada
| | - Joel Pekow
- Department of Gastroenterology, University of Chicago Medicine, Chicago, IL, USA
| | - Inga Peter
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Marieke J Pierik
- Department of Gastroenterology and Hepatology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Cyriel Y Ponsioen
- Department of Gastroenterology and Hepatology, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | | | - Natalie Prescott
- Department of Medical and Molecular Genetics, Kings College London, London, UK
| | - Ann E Pulver
- School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | | | - Daniel L Rice
- Genomics of Inflammation and Immunity Group, Human Genetics Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | - Päivi Saavalainen
- Research Programs Unit, Immunobiology, University of Helsinki, Helsinki, Finland
| | - Bruce Sands
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - R Balfour Sartor
- Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | | | - Stefan Schreiber
- Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - L Philip Schumm
- Department of Public Health Sciences, University of Chicago, Chicago, IL, USA
| | | | - Philippe Seksik
- Gastroenterology Department, Sorbonne Universite, Saint Antoine Hospital, Paris, France
| | - Rasha Shawky
- IBD BioResource, NIHR BioResource, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Shehzad Z Sheikh
- Center for Gastrointestinal Biology and Disease, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | | | - Alison Simmons
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Jurgita Skeiceviciene
- Department of Gastroenterology and Institute for Digestive Research, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Harry Sokol
- Gastroenterology Department, Sorbonne Universite, Saint Antoine Hospital, Paris, France
| | - Matthew Solomonson
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Hari Somineni
- Department of Pediatrics, Emory University School of Medicine and Children's Healthcare of Atlanta, Atlanta, GA, USA
| | - Dylan Sun
- Regeneron Genetics Center, Tarrytown, NY, USA
| | - Stephan Targan
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Dan Turner
- Shaare Zedek Medical Center, Jerusalem, Israel
| | - Holm H Uhlig
- Translational Gastroenterology Unit and Biomedical Research Centre, Nuffield Department of Clinical Medicine, Experimental Medicine Division, University of Oxford, Oxford, UK
- Department of Pediatrics, John Radcliffe Hospital, Oxford, UK
| | - Andrea E van der Meulen
- Department of Gastroenterology and Hepatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Séverine Vermeire
- University Hospitals Leuven, Leuven, Belgium
- Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
| | - Sare Verstockt
- Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium
| | - Michiel D Voskuil
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | - Andre Franke
- Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Steven R Brant
- Meyerhoff Inflammatory Bowel Disease Center, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Crohn's Colitis Center of New Jersey, Department of Medicine, Rutgers Robert Wood Johnson Medical School and Department of Genetics and the Human Genetics Institute of New Jersey, Rutgers University, New Brunswick and Piscataway, NJ, USA
| | - Judy Cho
- Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Rinse K Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Miles Parkes
- Department of Gastroenterology, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Ramnik J Xavier
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Computational and Integrative Biology, Massachusetts General Hospital, Boston, MA, USA
- Department of Molecular Biology, Massachusetts General Hospital, Boston, MA, USA
- Kurt Isselbacher Professor of Medicine at Harvard Medical School, Cambridge, MA, USA
- Core Institute Member, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Klarman Cell Observatory, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Immunology Program, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Microbiome Informatics and Therapeutics at MIT, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Manuel A Rivas
- Department of Biomedical Data Science, Stanford University, Stanford, CA, USA
| | - John D Rioux
- Research Center Montreal Heart Institute, Montreal, Quebec, Canada
- Faculty of Medicine, Université de Montréal, Montreal, Canada
| | - Dermot P B McGovern
- F. Widjaja Foundation Inflammatory Bowel and Immunobiology Research Institute, Cedars Sinai Medical Center, Los Angeles, CA, USA
| | - Hailiang Huang
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
| | - Carl A Anderson
- Genomics of Inflammation and Immunity Group, Human Genetics Programme, Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK.
| | - Mark J Daly
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Stanley Center for Psychiatric Research, The Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Analytic and Translational Genetics Unit, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
- Institute for Molecular Medicine Finland, FIMM, HiLIFE, University of Helsinki, Helsinki, Finland.
| |
Collapse
|
7
|
Hellenthal KEM, Brabenec L, Wagner NM. Regulation and Dysregulation of Endothelial Permeability during Systemic Inflammation. Cells 2022; 11:cells11121935. [PMID: 35741064 PMCID: PMC9221661 DOI: 10.3390/cells11121935] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/06/2022] [Accepted: 06/09/2022] [Indexed: 12/14/2022] Open
Abstract
Systemic inflammation can be triggered by infection, surgery, trauma or burns. During systemic inflammation, an overshooting immune response induces tissue damage resulting in organ dysfunction and mortality. Endothelial cells make up the inner lining of all blood vessels and are critically involved in maintaining organ integrity by regulating tissue perfusion. Permeability of the endothelial monolayer is strictly controlled and highly organ-specific, forming continuous, fenestrated and discontinuous capillaries that orchestrate the extravasation of fluids, proteins and solutes to maintain organ homeostasis. In the physiological state, the endothelial barrier is maintained by the glycocalyx, extracellular matrix and intercellular junctions including adherens and tight junctions. As endothelial cells are constantly sensing and responding to the extracellular environment, their activation by inflammatory stimuli promotes a loss of endothelial barrier function, which has been identified as a hallmark of systemic inflammation, leading to tissue edema formation and hypotension and thus, is a key contributor to lethal outcomes. In this review, we provide a comprehensive summary of the major players, such as the angiopoietin-Tie2 signaling axis, adrenomedullin and vascular endothelial (VE-) cadherin, that substantially contribute to the regulation and dysregulation of endothelial permeability during systemic inflammation and elucidate treatment strategies targeting the preservation of vascular integrity.
Collapse
|
8
|
Callesen KT, Yuste-Montalvo A, Poulsen LK, Jensen BM, Esteban V. In Vitro Investigation of Vascular Permeability in Endothelial Cells from Human Artery, Vein and Lung Microvessels at Steady-State and Anaphylactic Conditions. Biomedicines 2021; 9:biomedicines9040439. [PMID: 33921871 PMCID: PMC8072631 DOI: 10.3390/biomedicines9040439] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/27/2021] [Accepted: 04/14/2021] [Indexed: 12/30/2022] Open
Abstract
Human anaphylactic reactions largely involve an increase in vascular permeability, which is mainly controlled by endothelial cells (ECs). Due to the acute and serious nature of human anaphylaxis, in vivo studies of blood vessels must be replaced or supplemented with in vitro models. Therefore, we used a macromolecular tracer assay (MMTA) to investigate the EC permeability of three phenotypes of human ECs: artery (HAECs), vein (HSVECs) and microvessels from lung (HMLECs). ECs were stimulated with two fast-acting anaphylactic mediators (histamine and platelet-activating factor (PAF)) and one longer-lasting mediator (thrombin). At steady-state conditions, HSVEC monolayers were the most permeable and HMLEC the least (15.8% and 8.3% after 60 min, respectively). No response was found in ECs from artery or vein to any stimuli. ECs from microvessels reacted to stimulation with thrombin and also demonstrated a tendency of increased permeability for PAF. There was no reaction for histamine. This was not caused by missing receptor expression, as all three EC phenotypes expressed receptors for both PAF and histamine. The scarce response to fast-acting mediators illustrates that the MMTA is not suitable for investigating EC permeability to anaphylactic mediators.
Collapse
Affiliation(s)
- Katrine T. Callesen
- Laboratory of Medical Allergology, Copenhagen University Hospital at Gentofte, DK-2900 Hellerup, Denmark; (K.T.C.); (L.K.P.); (B.M.J.)
| | - Alma Yuste-Montalvo
- Department of Allergy and Immunology, IIS-Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain;
| | - Lars K. Poulsen
- Laboratory of Medical Allergology, Copenhagen University Hospital at Gentofte, DK-2900 Hellerup, Denmark; (K.T.C.); (L.K.P.); (B.M.J.)
| | - Bettina M. Jensen
- Laboratory of Medical Allergology, Copenhagen University Hospital at Gentofte, DK-2900 Hellerup, Denmark; (K.T.C.); (L.K.P.); (B.M.J.)
| | - Vanesa Esteban
- Department of Allergy and Immunology, IIS-Fundación Jiménez Díaz, UAM, 28040 Madrid, Spain;
- Faculty of Medicine and Biomedicine, Alfonso X El Sabio University, 28691 Madrid, Spain
- Red de Asma, Reacciones Adversas y Alérgicas (ARADyAL), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
| |
Collapse
|
9
|
Molecular Dambusters: What Is Behind Hyperpermeability in Bradykinin-Mediated Angioedema? Clin Rev Allergy Immunol 2021; 60:318-347. [PMID: 33725263 PMCID: PMC7962090 DOI: 10.1007/s12016-021-08851-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/07/2021] [Indexed: 02/08/2023]
Abstract
In the last few decades, a substantial body of evidence underlined the pivotal role of bradykinin in certain types of angioedema. The formation and breakdown of bradykinin has been studied thoroughly; however, numerous questions remained open regarding the triggering, course, and termination of angioedema attacks. Recently, it became clear that vascular endothelial cells have an integrative role in the regulation of vessel permeability. Apart from bradykinin, a great number of factors of different origin, structure, and mechanism of action are capable of modifying the integrity of vascular endothelium, and thus, may participate in the regulation of angioedema formation. Our aim in this review is to describe the most important permeability factors and the molecular mechanisms how they act on endothelial cells. Based on endothelial cell function, we also attempt to explain some of the challenging findings regarding bradykinin-mediated angioedema, where the function of bradykinin itself cannot account for the pathophysiology. By deciphering the complex scenario of vascular permeability regulation and edema formation, we may gain better scientific tools to be able to predict and treat not only bradykinin-mediated but other types of angioedema as well.
Collapse
|
10
|
Maltas J, Reed H, Porter A, Malliri A. Mechanisms and consequences of dysregulation of the Tiam family of Rac activators in disease. Biochem Soc Trans 2020; 48:2703-2719. [PMID: 33200195 DOI: 10.1042/bst20200481] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/16/2020] [Accepted: 10/16/2020] [Indexed: 12/14/2022]
Abstract
The Tiam family proteins - Tiam1 and Tiam2/STEF - are Rac1-specific Guanine Nucleotide Exchange Factors (GEFs) with important functions in epithelial, neuronal, immune and other cell types. Tiam GEFs regulate cellular migration, proliferation and survival, mainly through activating and directing Rac1 signalling. Dysregulation of the Tiam GEFs is significantly associated with human diseases including cancer, immunological and neurological disorders. Uncovering the mechanisms and consequences of dysregulation is therefore imperative to improving the diagnosis and treatment of diseases. Here we compare and contrast the subcellular localisation and function of Tiam1 and Tiam2/STEF, and review the evidence for their dysregulation in disease.
Collapse
Affiliation(s)
- Joe Maltas
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Hannah Reed
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Andrew Porter
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| | - Angeliki Malliri
- Cell Signalling Group, Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park SK10 4TG, U.K
| |
Collapse
|
11
|
Zhang F, Liu L, Zhang H, Liu ZL. Effect of Platelet-Activating Factor on Barrier Function of ARPE-19 Cells. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:4205-4214. [PMID: 33116408 PMCID: PMC7567541 DOI: 10.2147/dddt.s251941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 09/25/2020] [Indexed: 12/17/2022]
Abstract
Aim To examine the effects of platelet-activating factor (PAF) on the barrier functions of cultured retinal pigment epithelial (RPE) cells. Methods A human RPE cell line (ARPE-19) was cultured on microporous filter supports and treated with PAF and WEB 2086, a specific PAF-receptor (PAF-R) antagonist. The permeability of the RPE monolayer was measured using transepithelial electrical resistance (TER) and sodium fluorescein flux. The expression of the tight junction protein zonula occludens (ZO)-1 and the adherens junction protein N-cadherin was assessed using immunohistochemistry and Western blotting. We also measured the vascular endothelial growth factor (VEGF) concentrations in PAF-treated cultures and re-measured RPE monolayer permeability in the presence of VEGF-neutralizing antibodies. Results PAF significantly decreased the TER and enhanced the sodium fluorescein flux of the RPE monolayer and downregulated the expression of ZO-1 and N-cadherin. These effects were abolished by WEB 2086-mediated blockage of the PAF-R. PAF stimulation increased VEGF expression in RPE cells, and the antibody-mediated neutralization of VEGF caused a partial recovery of the barrier properties. Conclusion The barrier functions of ARPE-19 cells were altered by PAF, and these effects were partly mediated by an upregulation of VEGF expression in these cells. Our results contribute to the growing body of evidence supporting the role of PAF in choroidal neovascularization. Our findings suggest that PAF is a novel target in the development of therapies for increased permeability of the RPE monolayer.
Collapse
Affiliation(s)
- Fan Zhang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Eye Hospital of China Medical University, Key Lens Research Laboratory of Liaoning Province, Shenyang, Liaoning, People's Republic of China
| | - Lei Liu
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Han Zhang
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| | - Zhe-Li Liu
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People's Republic of China
| |
Collapse
|
12
|
Birch CA, Molinar-Inglis O, Trejo J. Subcellular hot spots of GPCR signaling promote vascular inflammation. ACTA ACUST UNITED AC 2020; 16:37-42. [PMID: 32838054 PMCID: PMC7431397 DOI: 10.1016/j.coemr.2020.07.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
G-coupled protein receptors (GPCRs) comprise the largest class of druggable targets. Signaling by GPCRs is initiated from subcellular hot spots including the plasma membrane, signalosomes, and endosomes to contribute to vascular inflammation. GPCR-G protein signaling at the plasma membrane causes endothelial barrier disruption and also cross-talks with growth factor receptors to promote proinflammatory signaling. A second surge of GPCR signaling is initiated by cytoplasmic NFκB activation mediated by β-arrestins and CARMA-BCL10-MALT1 signalosomes. Once internalized, ubiquitinated GPCRs initiate signaling from endosomes via assembly of the transforming growth factor-β-activated kinase binding protein-1 (TAB1)-TAB2-p38 MAPK complex to promote vascular inflammation. Understanding the complexities of GPCR signaling is critical for development of new strategies to treat vascular inflammation such as that associated with COVID-19.
Collapse
Key Words
- Arrestins
- B-cell lymphoma protein 10, (BCL10)
- COVID-19
- Endosomes
- Endothelial
- G protein-coupled receptor, GPCR
- JAK-STAT
- Janus kinase, JAK
- MALT1
- NFκB
- adherens junctions, AJ
- angiotensin II type 1 receptor, AT1
- angiotensin converting enzyme-2, ACE2
- caspase recruitment domain-containing protein, CARMA
- coronavirus disease of 2019, COVID-19
- fibroblast-growth-factor, FGF
- inhibitor of NFκB kinase, IKK
- mitogen-activated protein kinase, MAPK
- mucosa-associated lymphoid tissue lymphoma translocation protein 1, (MALT1)
- neural precursor cell expressed developmentally downregulated protein 4, NEDD4
- nuclear factor kappa-light-chain-enhancer of activated B cells, NFκB
- p38 MAPK
- platelet activating factor, PAF
- protease-activated receptor-1, PAR1
- severe acute respiratory syndrome coronavirus 2, SARS-CoV-2
- signal transducer and activator of transcription, STAT
- transforming growth factor-α-activated kinase binding protein-1, TAB1
Collapse
Affiliation(s)
- Cierra A Birch
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Olivia Molinar-Inglis
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| | - JoAnn Trejo
- Department of Pharmacology, School of Medicine, University of California, San Diego, La Jolla, CA, 92093, USA
| |
Collapse
|
13
|
The contribution of platelets to intravascular arrest, extravasation, and outgrowth of disseminated tumor cells. Clin Exp Metastasis 2020; 37:47-67. [PMID: 31758288 DOI: 10.1007/s10585-019-10009-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/15/2019] [Indexed: 12/16/2022]
Abstract
Platelets are primarily known for their contribution to hemostasis and subsequent wound healing. In addition to these functions, platelets play a role in the process of metastasis. Since the first study that suggested a metastasis-promoting function for platelets was published in 1968, various mechanisms have been proposed to explain how platelets contribute to the metastatic process. These include roles in the intravascular arrest of tumor cells, in tumor cell transendothelial migration, in the degradation of basement membrane barriers, in migration and invasion at the metastatic site, and in the proliferation of disseminated tumor cells. Nevertheless, conflicting observations about the role of platelets in these processes have also been reported. Here, we review the in vivo evidence that supports a role for platelets in metastasis formation, propose several scenarios for the contribution of platelets to tumor cell arrest and transendothelial migration, and discuss the evidence that platelets contribute to metastatic invasion and outgrowth.
Collapse
|
14
|
Wettschureck N, Strilic B, Offermanns S. Passing the Vascular Barrier: Endothelial Signaling Processes Controlling Extravasation. Physiol Rev 2019; 99:1467-1525. [PMID: 31140373 DOI: 10.1152/physrev.00037.2018] [Citation(s) in RCA: 150] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A central function of the vascular endothelium is to serve as a barrier between the blood and the surrounding tissue of the body. At the same time, solutes and cells have to pass the endothelium to leave or to enter the bloodstream to maintain homeostasis. Under pathological conditions, for example, inflammation, permeability for fluid and cells is largely increased in the affected area, thereby facilitating host defense. To appropriately function as a regulated permeability filter, the endothelium uses various mechanisms to allow solutes and cells to pass the endothelial layer. These include transcellular and paracellular pathways of which the latter requires remodeling of intercellular junctions for its regulation. This review provides an overview on endothelial barrier regulation and focuses on the endothelial signaling mechanisms controlling the opening and closing of paracellular pathways for solutes and cells such as leukocytes and metastasizing tumor cells.
Collapse
Affiliation(s)
- Nina Wettschureck
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
| | - Boris Strilic
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
| | - Stefan Offermanns
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research , Bad Nauheim , Germany ; and Centre for Molecular Medicine, Medical Faculty, J.W. Goethe University Frankfurt , Frankfurt , Germany
| |
Collapse
|
15
|
Abstract
Acute kidney injury (AKI), a major public health problem associated with high mortality and increased risk of progression towards end-stage renal disease, is characterized by the activation of intra-renal haemostatic and inflammatory processes. Platelets, which are present in high numbers in the circulation and can rapidly release a broad spectrum of bioactive mediators, are important acute modulators of inflammation and haemostasis, as they are the first cells to arrive at sites of acute injury, where they interact with endothelial cells and leukocytes. Diminished control of platelet reactivity by endothelial cells and/or an increased release of platelet-activating mediators can lead to uncontrolled platelet activation in AKI. As increased platelet sequestration and increased expression levels of the markers P-selectin, thromboxane A2, CC-chemokine ligand 5 and platelet factor 4 on platelets have been reported in kidneys following AKI, platelet activation likely plays a part in AKI pathology. Results from animal models and some clinical studies highlight the potential of antiplatelet therapies in the preservation of renal function in the context of AKI, but as current strategies also affect other cell types and non-platelet-derived mediators, additional studies are required to further elucidate the extent of platelet contribution to the pathology of AKI and to determine the best therapeutic approach by which to specifically target related pathogenic pathways.
Collapse
Affiliation(s)
- Marcel P B Jansen
- Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Sandrine Florquin
- Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Joris J T H Roelofs
- Department of Pathology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
| |
Collapse
|
16
|
Suresh K, Carino K, Johnston L, Servinsky L, Machamer CE, Kolb TM, Lam H, Dudek SM, An SS, Rane MJ, Shimoda LA, Damarla M. A nonapoptotic endothelial barrier-protective role for caspase-3. Am J Physiol Lung Cell Mol Physiol 2019; 316:L1118-L1126. [PMID: 30908935 PMCID: PMC6620669 DOI: 10.1152/ajplung.00487.2018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 02/26/2019] [Accepted: 03/17/2019] [Indexed: 12/25/2022] Open
Abstract
Noncanonical roles for caspase-3 are emerging in the fields of cancer and developmental biology. However, little is known of nonapoptotic functions of caspase-3 in most cell types. We have recently demonstrated a disassociation between caspase-3 activation and execution of apoptosis with accompanying cytoplasmic caspase-3 sequestration and preserved endothelial barrier function. Therefore, we tested the hypothesis that nonapoptotic caspase-3 activation promotes endothelial barrier integrity. Human lung microvascular endothelial cells were exposed to thrombin, a nonapoptotic stimulus, and endothelial barrier function was assessed using electric cell-substrate impedance sensing. Actin cytoskeletal rearrangement and paracellular gap formation were assessed using phalloidin staining. Cell stiffness was evaluated using magnetic twisting cytometry. In addition, cell lysates were harvested for protein analyses. Caspase-3 was inhibited pharmacologically with pan-caspase and a caspase-3-specific inhibitor. Molecular inhibition of caspase-3 was achieved using RNA interference. Cells exposed to thrombin exhibited a cytoplasmic activation of caspase-3 with transient and nonapoptotic decrease in endothelial barrier function as measured by a drop in electrical resistance followed by a rapid recovery. Inhibition of caspases led to a more pronounced and rapid drop in thrombin-induced endothelial barrier function, accompanied by increased endothelial cell stiffness and paracellular gaps. Caspase-3-specific inhibition and caspase-3 knockdown both resulted in more pronounced thrombin-induced endothelial barrier disruption. Taken together, our results suggest cytoplasmic caspase-3 has nonapoptotic functions in human endothelium and can promote endothelial barrier integrity.
Collapse
Affiliation(s)
- Karthik Suresh
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Kathleen Carino
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Laura Johnston
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Laura Servinsky
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Carolyn E Machamer
- Department of Cell Biology, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Todd M Kolb
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Hong Lam
- Department of Environmental Health and Engineering, Johns Hopkins University School of Public Health , Baltimore, Maryland
| | - Steven M Dudek
- Department of Medicine, College of Medicine, University of Illinois at Chicago , Chicago, Illinois
| | - Steven S An
- Department of Environmental Health and Engineering, Johns Hopkins University School of Public Health , Baltimore, Maryland
| | - Madhavi J Rane
- Department of Medicine, School of Medicine, University of Louisville , Louisville, Kentucky
| | - Larissa A Shimoda
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Mahendra Damarla
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, Maryland
| |
Collapse
|
17
|
Flentje A, Kalsi R, Monahan TS. Small GTPases and Their Role in Vascular Disease. Int J Mol Sci 2019; 20:ijms20040917. [PMID: 30791562 PMCID: PMC6413073 DOI: 10.3390/ijms20040917] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 01/31/2019] [Accepted: 02/07/2019] [Indexed: 12/18/2022] Open
Abstract
Over eighty million people in the United States have cardiovascular disease that can affect the heart causing myocardial infarction; the carotid arteries causing stroke; and the lower extremities leading to amputation. The treatment for end-stage cardiovascular disease is surgical—either endovascular therapy with balloons and stents—or open reconstruction to reestablish blood flow. All interventions damage or destroy the protective inner lining of the blood vessel—the endothelium. An intact endothelium is essential to provide a protective; antithrombotic lining of a blood vessel. Currently; there are no agents used in the clinical setting that promote reendothelialization. This process requires migration of endothelial cells to the denuded vessel; proliferation of endothelial cells on the denuded vessel surface; and the reconstitution of the tight adherence junctions responsible for the formation of an impermeable surface. These processes are all regulated in part and are dependent on small GTPases. As important as the small GTPases are for reendothelialization, dysregulation of these molecules can result in various vascular pathologies including aneurysm formation, atherosclerosis, diabetes, angiogenesis, and hypertension. A better understanding of the role of small GTPases in endothelial cell migration is essential to the development for novel agents to treat vascular disease.
Collapse
Affiliation(s)
- Alison Flentje
- Division of Vascular Surgery, Department of Surgery, University of Maryland School of Medicine, 22 South Greene Street, Suite S10B00, Baltimore, MD 21201, USA.
| | - Richa Kalsi
- Division of Vascular Surgery, Department of Surgery, University of Maryland School of Medicine, 22 South Greene Street, Suite S10B00, Baltimore, MD 21201, USA.
| | - Thomas S Monahan
- Division of Vascular Surgery, Department of Surgery, University of Maryland School of Medicine, 22 South Greene Street, Suite S10B00, Baltimore, MD 21201, USA.
| |
Collapse
|
18
|
Saluk-Bijak J, Dziedzic A, Bijak M. Pro-Thrombotic Activity of Blood Platelets in Multiple Sclerosis. Cells 2019; 8:cells8020110. [PMID: 30717273 PMCID: PMC6406904 DOI: 10.3390/cells8020110] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Revised: 01/19/2019] [Accepted: 01/31/2019] [Indexed: 12/18/2022] Open
Abstract
The available data, including experimental studies, clearly indicate an excessive intravascular activation of circulating platelets in multiple sclerosis (MS) and their hyper-responsiveness to a variety of physiological activators. Platelet activation is manifested as an increased adhesion and aggregation and is accompanied by the formation of pro-thrombotic microparticles. Activated blood platelets also show an expression of specific membrane receptors, synthesis many of biomediators, and generation of reactive oxygen species. Epidemiological studies confirm the high risk of stroke or myocardial infarction in MS that are ischemic incidents, strictly associated with incorrect platelet functions and their over pro-thrombotic activity. Chronic inflammation and high activity of pro-oxidative processes in the course of MS are the main factors identified as the cause of excessive platelet activation. The primary biological function of platelets is to support vascular integrity, but the importance of platelets in inflammatory diseases is also well documented. The pro-thrombotic activity of platelets and their inflammatory properties play a part in the pathophysiology of MS. The analysis of platelet function capability in MS could provide useful information for studying the pathogenesis of this disease. Due to the complexity of pathological processes in MS, medication must be multifaceted and blood platelets can probably be identified as new targets for therapy in the future.
Collapse
Affiliation(s)
- Joanna Saluk-Bijak
- Department of General Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Angela Dziedzic
- Department of General Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| | - Michal Bijak
- Department of General Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
| |
Collapse
|
19
|
Cryoprecipitate augments the global transduction of the adeno-associated virus serotype 9 after a systemic administration. J Control Release 2018; 286:415-424. [PMID: 30107215 DOI: 10.1016/j.jconrel.2018.08.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/29/2018] [Accepted: 08/10/2018] [Indexed: 11/20/2022]
Abstract
Adeno-associated virus (AAV) vectors have been successfully used for transgene delivery in clinical trials. A systemic administration of AAV vectors has been proposed in order to achieve global transduction, which requires that the AAV vector is capable of crossing the blood vessels. It has been demonstrated that serum proteins are able to directly interact with AAV virions to enhance liver transduction. In this study, we investigate whether the serum proteins have the potential to increase the capacity of AAV to diffuse through the endothelial cells and deliver the transgene into the whole body. First, we found that the direct interaction of serum with AAV9 virions increased the epithelial cell permeability of AAV9 in vitro. Several serum proteins with a potential effect on AAV vascular permeability have been identified from mass spectrometry analysis, including fibrinogen, fibronectin, von Willebrand factor (vWF), platelet factor 4, alpha-1-acid glycoprotein, and plasminogen. The incubation of these serum proteins with AAV9 enhanced the global transduction in mice after a systemic administration. To apply these findings in clinical practice, we demonstrated that the clinical product cryoprecipitate (mainly containing fibrinogen and vWF) augmented AAV9 global transduction. The mechanism study revealed that cryoprecipitate slowed down the clearance of AAV9 vectors in the blood so that the AAV9 vectors had sufficient time to travel to the peripheral organs. In summary, the results from this study suggests that serum proteins interact with AAV virions and enhance the AAV9 vascular permeability for global transduction, and, more importantly, cryoprecipitate can be immediately applied for clinical patients who need the systemic administration of AAV vectors for global transduction.
Collapse
|
20
|
González-Mariscal L, Raya-Sandino A, González-González L, Hernández-Guzmán C. Relationship between G proteins coupled receptors and tight junctions. Tissue Barriers 2018; 6:e1414015. [PMID: 29420165 DOI: 10.1080/21688370.2017.1414015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Tight junctions (TJs) are sites of cell-cell adhesion, constituted by a cytoplasmic plaque of molecules linked to integral proteins that form a network of strands around epithelial and endothelial cells at the uppermost portion of the lateral membrane. TJs maintain plasma membrane polarity and form channels and barriers that regulate the transit of ions and molecules through the paracellular pathway. This structure that regulates traffic between the external milieu and the organism is affected in numerous pathological conditions and constitutes an important target for therapeutic intervention. Here, we describe how a wide array of G protein-coupled receptors that are activated by diverse stimuli including light, ions, hormones, peptides, lipids, nucleotides and proteases, signal through heterotrimeric G proteins, arrestins and kinases to regulate TJs present in the blood-brain barrier, the blood-retinal barrier, renal tubular cells, keratinocytes, lung and colon, and the slit diaphragm of the glomerulus.
Collapse
Affiliation(s)
- Lorenza González-Mariscal
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Arturo Raya-Sandino
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Laura González-González
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| | - Christian Hernández-Guzmán
- a Department of Physiology , Biophysics and Neuroscience, Center for Research and Advanced Studies (Cinvestav) , Mexico City , Mexico
| |
Collapse
|
21
|
Abstract
Edema is typically presented as a secondary effect from injury, illness, disease, or medication, and its impact on patient wellness is nested within the underlying etiology. Therefore, it is often thought of more as an amplifier to current preexisting conditions. Edema, however, can be an independent risk factor for patient deterioration. Improper management of edema is costly not only to the patient, but also to treatment and care facilities, as mismanagement of edema results in increased lengths of hospital stay. Direct tissue trauma, disease, or inappropriate resuscitation and/or ventilation strategies result in edema formation through physical disruption and chemical messenger-based structural modifications of the microvascular barrier. Derangements in microvascular barrier function limit tissue oxygenation, nutrient flow, and cellular waste removal. Recent studies have sought to elucidate cellular signaling and structural alterations that result in vascular hyperpermeability in a variety of critical care conditions to include hemorrhage, burn trauma, and sepsis. These studies and many others have highlighted how multiple mechanisms alter paracellular and/or transcellular pathways promoting hyperpermeability. Roles for endothelial glycocalyx, extracellular matrix and basement membrane, vesiculo-vacuolar organelles, cellular junction and cytoskeletal proteins, and vascular pericytes have been described, demonstrating the complexity of microvascular barrier regulation. Understanding these basic mechanisms inside and out of microvessels aid in developing better treatment strategies to mitigate the harmful effects of excessive edema formation.
Collapse
|
22
|
Yang W, Shibamoto T, Kuda Y, Zhang T, Tanida M, Kurata Y. β₂-Adrenoceptor Blockade Deteriorates Systemic Anaphylaxis by Enhancing Hyperpermeability in Anesthetized Mice. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:52-61. [PMID: 29178678 PMCID: PMC5705484 DOI: 10.4168/aair.2018.10.1.52] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 08/25/2017] [Accepted: 08/25/2017] [Indexed: 11/20/2022]
Abstract
Purpose Patients treated with propranolol, a nonselective β-adrenoceptor antagonist, develop severe anaphylaxis, but the mechanism remains unknown. We determined effects of β1- and β2-adrenoceptor antagonists on the anaphylaxis-induced increase in vascular permeability in mice. Methods In anesthetized ovalbumin-sensitized C57BL mice, mean arterial blood pressure (MBP) was measured, and Evans blue dye extravasation and hematocrit (Hct) were assessed at 20 minutes after antigen injection. The following pretreatment groups (n=7/group) were studied: (1) sensitized control (non-pretreatment), (2) propranolol, (3) the selective β2-adrenoceptor antagonist ICI 118,551, (4) the selective β1-adrenoceptor antagonist atenolol, (5) adrenalectomy, (6) the selective β2-adrenoceptor agonist terbutaline, and (7) non-sensitized groups. Results The antigen injection decreased MBP, and increased Hct and vascular permeability in the kidney, lung, mesentery, and intestine, but not in the liver or spleen. Pretreatment with ICI 118,551, propranolol and adrenalectomy, but not atenolol, reduced the survival rate and augmented the increases in Hct and vascular permeability in the kidney, intestine, and lung as compared with the sensitized control group. Pretreatment with terbutaline abolished the antigen-induced alterations. Plasma epinephrine levels were increased significantly in the sensitize control mice. Conclusions Blockade of β2-adrenoceptor can deteriorate systemic anaphylaxis by augmenting hyperpermeability-induced increase in plasma extravasation by inhibiting beneficial effects of epinephrine released from the adrenal glands in anesthetized mice.
Collapse
Affiliation(s)
- Wei Yang
- Department of Physiology II, Kanazawa Medical University, Uchinada, Japan.,Department of Infectious Disease, Shengjing Hospital of China Medical University, Shenyang, China
| | | | - Yuhichi Kuda
- Department of Physiology II, Kanazawa Medical University, Uchinada, Japan
| | - Tao Zhang
- Department of Physiology II, Kanazawa Medical University, Uchinada, Japan.,Department of Colorectal and Hernia Surgery, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
| | - Mamoru Tanida
- Department of Physiology II, Kanazawa Medical University, Uchinada, Japan
| | - Yasutaka Kurata
- Department of Physiology II, Kanazawa Medical University, Uchinada, Japan
| |
Collapse
|
23
|
Abstract
Lipid mediators play a critical role in the development and resolution of vascular endothelial barrier dysfunction caused by various pathologic interventions. The accumulation of excess lipids directly impairs endothelial cell (EC) barrier function that is known to contribute to the development of atherosclerosis and metabolic disorders such as obesity and diabetes as well as chronic inflammation in the vascular endothelium. Certain products of phospholipid oxidation (OxPL) such as fragmented phospholipids generated during oxidative and nitrosative stress show pro-inflammatory potential and cause endothelial barrier dysfunction. In turn, other OxPL products enhance basal EC barrier and exhibit potent barrier-protective effects in pathologic settings of acute vascular leak caused by pro-inflammatory mediators, barrier disruptive agonists and pathologic mechanical stimulation. These beneficial effects were further confirmed in rodent models of lung injury and inflammation. The bioactive oxidized lipid molecules may serve as important therapeutic prototype molecules for future treatment of acute lung injury syndromes associated with endothelial barrier dysfunction and inflammation. This review will summarize recent studies of biological effects exhibited by various groups of lipid mediators with a focus on the role of oxidized phospholipids in control of vascular endothelial barrier, agonist induced EC permeability, inflammation, and barrier recovery related to clinical settings of acute lung injury and inflammatory vascular leak.
Collapse
Affiliation(s)
- Pratap Karki
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Konstantin G. Birukov
- Department of Anesthesiology, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA,CONTACT Konstantin G. Birukov, MD, PhD Department of Anesthesiology, University of Maryland, School of Medicine, 20 Penn Street, HSF-2, Room 145, Baltimore, MD 21201, USA
| |
Collapse
|
24
|
Lautenschläger I, Wong YL, Sarau J, Goldmann T, Zitta K, Albrecht M, Frerichs I, Weiler N, Uhlig S. Signalling mechanisms in PAF-induced intestinal failure. Sci Rep 2017; 7:13382. [PMID: 29042668 PMCID: PMC5645457 DOI: 10.1038/s41598-017-13850-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Accepted: 09/29/2017] [Indexed: 12/11/2022] Open
Abstract
Capillary leakage syndrome, vasomotor disturbances and gut atony are common clinical problems in intensive care medicine. Various inflammatory mediators and signalling pathways are involved in these pathophysiological alterations among them platelet-activating factor (PAF). The related signalling mechanisms of the PAF-induced dysfunctions are only poorly understood. Here we used the model of the isolated perfused rat small intestine to analyse the role of calcium (using calcium deprivation, IP-receptor blockade (2-APB)), cAMP (PDE-inhibition plus AC activator), myosin light chain kinase (inhibitor ML-7) and Rho-kinase (inhibitor Y27632) in the following PAF-induced malfunctions: vasoconstriction, capillary and mucosal leakage, oedema formation, malabsorption and atony. Among these, the PAF-induced vasoconstriction and hyperpermeability appear to be governed by similar mechanisms that involve IP3 receptors, extracellular calcium and the Rho-kinase. Our findings further suggest that cAMP-elevating treatments - while effective against hypertension and oedema - bear the risk of dysmotility and reduced nutrient uptake. Agents such as 2-APB or Y27632, on the other hand, showed no negative side effects and improved most of the PAF-induced malfunctions suggesting that their therapeutic usefulness should be explored.
Collapse
Affiliation(s)
- Ingmar Lautenschläger
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany.
| | - Yuk Lung Wong
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Jürgen Sarau
- Division of Mucosal Immunology and Diagnostic, Research Centre Borstel, Leibniz-Centre for Medicine and Biosciences, Borstel, Germany
| | - Torsten Goldmann
- Division of Clinical and Experimental Pathology, Research Centre Borstel, Leibniz-Centre for Medicine and Biosciences, Borstel, Germany
| | - Karina Zitta
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Martin Albrecht
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Inéz Frerichs
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Norbert Weiler
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, Medical Faculty, RWTH Aachen University, Aachen, Germany
| |
Collapse
|
25
|
Granger DN, Kvietys PR. Reperfusion therapy-What's with the obstructed, leaky and broken capillaries? ACTA ACUST UNITED AC 2017; 24:213-228. [PMID: 29102280 DOI: 10.1016/j.pathophys.2017.09.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Microvascular dysfunction is well established as an early and rate-determining factor in the injury response of tissues to ischemia and reperfusion (I/R). Severe endothelial cell dysfunction, which can develop without obvious morphological cell injury, is a major underlying cause of the microvascular abnormalities that accompany I/R. While I/R-induced microvascular dysfunction is manifested in different ways, two responses that have received much attention in both the experimental and clinical setting are impaired capillary perfusion (no-reflow) and endothelial barrier failure with a transition to hemorrhage. These responses are emerging as potentially important determinants of the severity of the tissue injury response, and there is growing clinical evidence that they are predictive of clinical outcome following reperfusion therapy. This review provides a summary of animal studies that have focused on the mechanisms that may underlie the genesis of no-reflow and hemorrhage following reperfusion of ischemic tissues, and addresses the clinical evidence that implicates these vascular events in the responses of the ischemic brain (stroke) and heart (myocardial infarction) to reperfusion therapy. Inasmuch as reactive oxygen species (ROS) and matrix metalloproteinases (MMP) are frequently invoked as triggers of the microvascular dysfunction elicited by I/R, the potential roles and sources of these mediators are also discussed. The available evidence in the literature justifies the increased interest in the development of no-reflow and hemorrhage in heart and brain following reperfusion therapy, and suggests that these vascular events may be predictive of poor clinical outcome and warrant the development of targeted treatment strategies.
Collapse
Affiliation(s)
- D Neil Granger
- Department of Molecular & Cellular Physiology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130-3932, United States.
| | - Peter R Kvietys
- Department of Physiological Sciences, College of Medicine, Alfaisal University, Riyadh, Saudi Arabia
| |
Collapse
|
26
|
Abstract
Malignant carcinomas are often characterized by metastasis, the movement of carcinoma cells from a primary site to colonize distant organs. For metastasis to occur, carcinoma cells first must adopt a pro-migratory phenotype and move through the surrounding stroma towards a blood or lymphatic vessel. Currently, there are very limited possibilities to target these processes therapeutically. The family of Rho GTPases is an ubiquitously expressed division of GTP-binding proteins involved in the regulation of cytoskeletal dynamics and intracellular signaling. The best characterized members of the Rho family GTPases are RhoA, Rac1 and Cdc42. Abnormalities in Rho GTPase function have major consequences for cancer progression. Rho GTPase activation is driven by cell surface receptors that activate GTP exchange factors (GEFs) and GTPase-activating proteins (GAPs). In this review, we summarize our current knowledge on Rho GTPase function in the regulation of metastasis. We will focus on key discoveries in the regulation of epithelial-mesenchymal-transition (EMT), cell-cell junctions, formation of membrane protrusions, plasticity of cell migration and adaptation to a hypoxic environment. In addition, we will emphasize on crosstalk between Rho GTPase family members and other important oncogenic pathways, such as cyclic AMP-mediated signaling, canonical Wnt/β-catenin, Yes-associated protein (YAP) and hypoxia inducible factor 1α (Hif1α) and provide an overview of the advancements and challenges in developing pharmacological tools to target Rho GTPase and the aforementioned crosstalk in the context of cancer therapeutics.
Collapse
|
27
|
A CDC42-centered signaling unit is a dominant positive regulator of endothelial integrity. Sci Rep 2017; 7:10132. [PMID: 28860633 PMCID: PMC5579287 DOI: 10.1038/s41598-017-10392-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/07/2017] [Indexed: 12/27/2022] Open
Abstract
Endothelial barrier function is carefully controlled to protect tissues from edema and damage inflicted by extravasated leukocytes. RhoGTPases, in conjunction with myriad regulatory proteins, exert both positive and negative effects on the endothelial barrier integrity. Precise knowledge about the relevant mechanisms is currently fragmented and we therefore performed a comprehensive analysis of endothelial barrier regulation by RhoGTPases and their regulators. Combining RNAi with electrical impedance measurements we quantified the relevance of 270 Rho-associated genes for endothelial barrier function. Statistical analysis identified 10 targets of which six promoted- and four reduced endothelial barrier function upon downregulation. We analyzed in more detail two of these which were not previously identified as regulators of endothelial integrity. We found that the Rac1-GEF (Guanine nucleotide Exchange Factor) TIAM2 is a positive regulator and the Cdc42(Rac1)-GAP (GTPase-Activating Protein) SYDE1 is a negative regulator of the endothelial barrier function. Finally, we found that the GAP SYDE1 is part of a Cdc42-centered signaling unit, also comprising the Cdc42-GEF FARP1 and the Cdc42 effector PAK7 which controls the integrity of the endothelial barrier. In conclusion, using a siRNA-based screen, we identified new regulators of barrier function and found that Cdc42 is a dominant positive regulator of endothelial integrity.
Collapse
|
28
|
Komarova YA, Kruse K, Mehta D, Malik AB. Protein Interactions at Endothelial Junctions and Signaling Mechanisms Regulating Endothelial Permeability. Circ Res 2017; 120:179-206. [PMID: 28057793 DOI: 10.1161/circresaha.116.306534] [Citation(s) in RCA: 293] [Impact Index Per Article: 41.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 10/04/2016] [Accepted: 10/06/2016] [Indexed: 12/31/2022]
Abstract
The monolayer of endothelial cells lining the vessel wall forms a semipermeable barrier (in all tissue except the relatively impermeable blood-brain and inner retinal barriers) that regulates tissue-fluid homeostasis, transport of nutrients, and migration of blood cells across the barrier. Permeability of the endothelial barrier is primarily regulated by a protein complex called adherens junctions. Adherens junctions are not static structures; they are continuously remodeled in response to mechanical and chemical cues in both physiological and pathological settings. Here, we discuss recent insights into the post-translational modifications of junctional proteins and signaling pathways regulating plasticity of adherens junctions and endothelial permeability. We also discuss in the context of what is already known and newly defined signaling pathways that mediate endothelial barrier leakiness (hyperpermeability) that are important in the pathogenesis of cardiovascular and lung diseases and vascular inflammation.
Collapse
Affiliation(s)
- Yulia A Komarova
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Kevin Kruse
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Dolly Mehta
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago
| | - Asrar B Malik
- From the Department of Pharmacology and the Center for Lung and Vascular Biology, University of Illinois College of Medicine, Chicago.
| |
Collapse
|
29
|
Predescu SA, Zhang J, Bardita C, Patel M, Godbole V, Predescu DN. Mouse Lung Fibroblast Resistance to Fas-Mediated Apoptosis Is Dependent on the Baculoviral Inhibitor of Apoptosis Protein 4 and the Cellular FLICE-Inhibitory Protein. Front Physiol 2017; 8:128. [PMID: 28352235 PMCID: PMC5348516 DOI: 10.3389/fphys.2017.00128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 02/17/2017] [Indexed: 01/01/2023] Open
Abstract
A characteristic feature of idiopathic pulmonary fibrosis (IPF) is accumulation of apoptotic resistant fibroblasts/myofibroblasts in the fibroblastic foci. As caveolin (Cav)-null mice develop pulmonary fibrosis (PF), we hypothesized that the participating fibroblasts display an apoptosis-resistant phenotype. To test this hypothesis and identify the molecular mechanisms involved we isolated lung fibroblasts from Cav-null mice and examined the expression of several inhibitors of apoptosis (IAPs), of c-FLIP, of Bcl-2 proteins and of the death receptor CD95/Fas. We found significant increase in XIAP and c-FLIP constitutive protein expression with no alteration of Bcl-2 and lower levels of CD95/Fas. The isolated fibroblasts were then treated with the CD95/Fas ligand (FasL) to induce apoptosis. While the morphological and biochemical alterations induced by FasL were similar in wild-type (wt) and Cav-null mouse lung fibroblasts, the time course and the extent of the alterations were greater in the Cav-null fibroblasts. Several salient features of Cav-null fibroblasts response such as loss of membrane potential, fragmentation of the mitochondrial continuum concurrent with caspase-8 activation, and subsequent Bid cleavage, prior to caspase-3 activation were detected. Furthermore, M30 antigen formation, phosphatidylserine expression and DNA fragmentation were caspase-3 dependent. SiRNA-mediated silencing of XIAP and c-FLIP, individually or combined, enhanced the sensitivity of lung fibroblasts to FasL-induced apoptosis. Pharmacological inhibition of Bcl-2 had no effect. Together our findings support a mechanism in which CD95/Fas engagement activates caspase-8, inducing mitochondrial apoptosis through Bid cleavage. XIAP and c-FLIP fine tune this process in a cell-type specific manner.
Collapse
Affiliation(s)
- Sanda A Predescu
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Rush University, Medical College Chicago, IL, USA
| | - Jian Zhang
- Department of Biological Sciences, Columbia University New York, NY, USA
| | - Cristina Bardita
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Rush University, Medical College Chicago, IL, USA
| | - Monal Patel
- Northwestern University Feinberg School of Medicine Chicago, IL, USA
| | - Varun Godbole
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Rush University, Medical College Chicago, IL, USA
| | - Dan N Predescu
- Department of Internal Medicine, Division of Pulmonary and Critical Care, Rush University, Medical College Chicago, IL, USA
| |
Collapse
|
30
|
Ma X, Xiaokaiti Y, Lei H, Liu W, Xu J, Sun Y, Zhao X, Pu X, Zhai S. Epinephrine inhibits vascular hyperpermeability during platelet-activating factor- or ovalbumin-induced anaphylaxis. RSC Adv 2017. [DOI: 10.1039/c7ra09268g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Platelet-activating factor (PAF) has been shown to play a critical role in mediating vascular hyperpermeability during anaphylaxis.
Collapse
Affiliation(s)
- Xiang Ma
- Department of Pharmacy
- Peking University Third Hospital
- Beijing
- China
| | - Yilixiati Xiaokaiti
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- School of Pharmacy and Pharmaceutical Science
| | - Hui Lei
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- Department of Molecular and Cellular Pharmacology
| | - Wei Liu
- Department of Pharmacy
- Peking University Third Hospital
- Beijing
- China
| | - Jiamin Xu
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- Department of Molecular and Cellular Pharmacology
| | - Yi Sun
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- Department of Molecular and Cellular Pharmacology
| | - Xin Zhao
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- Department of Molecular and Cellular Pharmacology
| | - Xiaoping Pu
- State Key Laboratory of Natural and Biomimetic Drugs
- Peking University
- Beijing
- China
- Department of Molecular and Cellular Pharmacology
| | - Suodi Zhai
- Department of Pharmacy
- Peking University Third Hospital
- Beijing
- China
| |
Collapse
|
31
|
Birukova AA, Shah AS, Tian Y, Gawlak G, Sarich N, Birukov KG. Selective Role of Vinculin in Contractile Mechanisms of Endothelial Permeability. Am J Respir Cell Mol Biol 2016; 55:476-486. [PMID: 27115795 DOI: 10.1165/rcmb.2015-0328oc] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Increased vascular endothelial cell (EC) permeability is a result of intercellular gap formation that may be induced by contraction-dependent and contraction-independent mechanisms. This study investigated a role of the adaptor protein vinculin in EC permeability induced by contractile (thrombin) and noncontractile (IL-6) agonists. Although thrombin and IL-6 caused a similar permeability increase in human pulmonary ECs and disrupted the association between vinculin and vascular endothelial-cadherin, they induced different patterns of focal adhesion (FA) arrangement. Thrombin, but not IL-6, caused formation of large, vinculin-positive FAs, phosphorylation of FA proteins, FA kinase and Crk-associated substrate, and increased vinculin-talin association. Thrombin-induced formation of talin-positive FA and intercellular gaps were suppressed in ECs with small interfering RNA-induced vinculin knockdown. Vinculin knockdown and inhibitors of Rho kinase and myosin-II motor activity also attenuated thrombin-induced EC permeability. Importantly, ectopic expression of the vinculin mutant lacking the F-actin-binding domain decreased thrombin-induced Rho pathway activation and EC permeability. In contrast, IL-6-induced EC permeability did not involve RhoA- or myosin-dependent mechanisms but engaged Janus kinase/signal transducer and activator of transcription-mediated phosphorylation and internalization of vascular endothelial-cadherin. This process was vinculin independent but Janus kinase/tyrosine kinase Src-dependent. These data suggest that vinculin participates in a contractile-dependent mechanism of permeability by integrating FA with stress fibers, leading to maximal RhoA activation and EC permeability response. Vinculin inhibition does not affect contractile-independent mechanisms of EC barrier failure. This study provides, for the first time, a comparative analysis of two alternative mechanisms of vascular endothelial barrier dysfunction and defines a specific role for vinculin in the contractile type of permeability response.
Collapse
Affiliation(s)
- Anna A Birukova
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Alok S Shah
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Yufeng Tian
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Grzegorz Gawlak
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Nicolene Sarich
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| | - Konstantin G Birukov
- Lung Injury Center, Section of Pulmonary and Critical Medicine, Department of Medicine, University of Chicago, Chicago, Illinois
| |
Collapse
|
32
|
Small GTPases and their guanine-nucleotide exchange factors and GTPase-activating proteins in neutrophil recruitment. Curr Opin Hematol 2016; 23:44-54. [PMID: 26619317 DOI: 10.1097/moh.0000000000000199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW The review describes the roles of Rho- and Rap-guanosine triphosphatases (GTPases) and of their activators, guanine-nucleotide exchange factors (GEFs), and inhibitors, GTPase activating proteins (GAPs), in neutrophil recruitment from the blood stream into inflamed tissues, with a focus on recently identified roles in neutrophils, endothelial cells, and platelets. RECENT FINDINGS Recent studies have identified important roles of Rho- and Rap-GTPases, and of their GEFs and GAPs, in the neutrophil recruitment cascade. These proteins control the upregulation and/or activation of adhesion molecules on the surface of neutrophils, endothelial cells, and platelets, and they alter cell/cell adhesion in the vascular endothelium. This enables the capture of neutrophils from the blood stream, their migration along and through the vessel wall, and their passage into the inflamed tissue. In particular, it has recently become clear that P-Rex and Vav family Rac-GEFs in platelets are crucial for neutrophil recruitment. SUMMARY These recent findings have contributed greatly to our understanding of the signalling pathways that control neutrophil recruitment to sites of inflammation and have opened up new avenues of research in this field.
Collapse
|
33
|
Guequén A, Carrasco R, Zamorano P, Rebolledo L, Burboa P, Sarmiento J, Boric MP, Korayem A, Durán WN, Sánchez FA. S-nitrosylation regulates VE-cadherin phosphorylation and internalization in microvascular permeability. Am J Physiol Heart Circ Physiol 2016; 310:H1039-44. [PMID: 26921435 DOI: 10.1152/ajpheart.00063.2016] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 02/17/2016] [Indexed: 11/22/2022]
Abstract
The adherens junction complex, composed mainly of vascular endothelial (VE)-cadherin, β-catenin, p120, and γ-catenin, is the main element of the endothelial barrier in postcapillary venules.S-nitrosylation of β-catenin and p120 is an important step in proinflammatory agents-induced hyperpermeability. We investigated in vitro and in vivo whether or not VE-cadherin isS-nitrosylated using platelet-activating factor (PAF) as agonist. We report that PAF-stimulates S-nitrosylation of VE-cadherin, which disrupts its association with β-catenin. In addition, based on inhibition of nitric oxide production, our results strongly suggest that S-nitrosylation is required for VE-cadherin phosphorylation on tyrosine and for its internalization. Our results unveil an important mechanism to regulate phosphorylation of junctional proteins in association with S-nitrosylation.
Collapse
Affiliation(s)
- Anita Guequén
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile
| | - Rodrigo Carrasco
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile
| | - Patricia Zamorano
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile
| | - Lorena Rebolledo
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile
| | - Pia Burboa
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile
| | - José Sarmiento
- Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Valdivia, Chile
| | - Mauricio P Boric
- Departamento de Fisiología, P. Universidad Católica de Chile, Santiago, Chile; and
| | - Adam Korayem
- Department of Pharmacology, Physiology and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Walter N Durán
- Department of Pharmacology, Physiology and Neuroscience, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, New Jersey
| | - Fabiola A Sánchez
- Instituto de Inmunología, Universidad Austral de Chile, Valdivia, Chile;
| |
Collapse
|
34
|
Nohata N, Uchida Y, Stratman AN, Adams RH, Zheng Y, Weinstein BM, Mukouyama YS, Gutkind JS. Temporal-specific roles of Rac1 during vascular development and retinal angiogenesis. Dev Biol 2016; 411:183-194. [PMID: 26872874 DOI: 10.1016/j.ydbio.2016.02.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/07/2016] [Accepted: 02/07/2016] [Indexed: 01/04/2023]
Abstract
Angiogenesis, the formation of new blood vessels by remodeling and growth of pre-existing vessels, is a highly orchestrated process that requires a tight balance between pro-angiogenic and anti-angiogenic factors and the integration of their corresponding signaling networks. The family of Rho GTPases, including RhoA, Rac1, and Cdc42, play a central role in many cell biological processes that involve cytoskeletal changes and cell movement. Specifically for Rac1, we have shown that excision of Rac1 using a Tie2-Cre animal line results in embryonic lethality in midgestation (embryonic day (E) 9.5), with multiple vascular defects. However, Tie2-Cre can be also expressed during vasculogenesis, prior to angiogenesis, and is active in some hematopoietic precursors that can affect vessel formation. To circumvent these limitations, we have now conditionally deleted Rac1 in a temporally controlled and endothelial-restricted fashion using Cdh5(PAC)-iCreERT2 transgenic mice. In this highly controlled experimental in vivo system, we now show that Rac1 is required for embryonic vascular integrity and angiogenesis, and for the formation of superficial and deep vascular networks in the post-natal developing retina, the latter involving a novel specific function for Rac1 in vertical blood vessel sprouting. Aligned with these findings, we show that RAC1 is spatially involved in endothelial cell migration, invasion, and radial sprouting activities in 3D collagen matrix in vitro models. Hence, Rac1 and its downstream molecules may represent potential anti-angiogeneic therapeutic targets for the treatment of many human diseases that involve aberrant neovascularization and blood vessel overgrowth.
Collapse
Affiliation(s)
- Nijiro Nohata
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, United States
| | - Yutaka Uchida
- Laboratory of Stem Cell and Neuro-Vascular Biology, Genetics and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20814, United States
| | - Amber N Stratman
- Section on Vertebrate Development, Program in the Genomics of Differentiation, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, United States
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Yi Zheng
- Cancer and Blood Diseases Institute, Cincinnati Children's Hospital, University of Cincinnati College of Medicine, Cincinnati, OH 45229, United States
| | - Brant M Weinstein
- Section on Vertebrate Development, Program in the Genomics of Differentiation, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, United States
| | - Yoh-Suke Mukouyama
- Laboratory of Stem Cell and Neuro-Vascular Biology, Genetics and Developmental Biology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20814, United States
| | - J Silvio Gutkind
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, United States; Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, United States.
| |
Collapse
|
35
|
van Buul JD, Timmerman I. Small Rho GTPase-mediated actin dynamics at endothelial adherens junctions. Small GTPases 2016; 7:21-31. [PMID: 26825121 DOI: 10.1080/21541248.2015.1131802] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
VE-cadherin-based cell-cell junctions form the major restrictive barrier of the endothelium to plasma proteins and blood cells. The function of VE-cadherin and the actin cytoskeleton are intimately linked. Vascular permeability factors and adherent leukocytes signal through small Rho GTPases to tightly regulate actin cytoskeletal rearrangements in order to open and re-assemble endothelial cell-cell junctions in a rapid and controlled manner. The Rho GTPases are activated by guanine nucleotide exchange factors (GEFs), conferring specificity and context-dependent control of cell-cell junctions. Although the molecular mechanisms that couple cadherins to actin filaments are beginning to be elucidated, specific stimulus-dependent regulation of the actin cytoskeleton at VE-cadherin-based junctions remains unexplained. Accumulating evidence has suggested that depending on the vascular permeability factor and on the subcellular localization of GEFs, cell-cell junction dynamics and organization are differentially regulated by one specific Rho GTPase. In this Commentary, we focus on new insights how the junctional actin cytoskeleton is specifically and locally regulated by Rho GTPases and GEFs in the endothelium.
Collapse
Affiliation(s)
- Jaap D van Buul
- a Department of Molecular Cell Biology , Sanquin Research and Landsteiner Laboratory, Academic Medical Center Amsterdam, University of Amsterdam , Amsterdam , the Netherlands
| | - Ilse Timmerman
- b Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory , Academic Medical Center Amsterdam, University of Amsterdam , Amsterdam , the Netherlands
| |
Collapse
|
36
|
Ashina K, Tsubosaka Y, Kobayashi K, Omori K, Murata T. VEGF-induced blood flow increase causes vascular hyper-permeability in vivo. Biochem Biophys Res Commun 2015; 464:590-5. [PMID: 26163262 DOI: 10.1016/j.bbrc.2015.07.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 07/02/2015] [Indexed: 01/06/2023]
Abstract
VEGF is known to cause vascular leak, its detailed mechanisms in vivo remain unclear. Here, we investigated the mechanisms underlying VEGF-induced vascular hyper-permeability focusing on two major regulators of vascular permeability: blood flow and endothelial barrier function. Administration of VEGF caused vascular hyper-permeability and tissue swelling in mouse ears, which were abolished by VEGF receptor-2 blockade. Intravital imaging showed that VEGF dilated ear arteries but not veins, and laser Doppler velocimetry showed that VEGF quickly increased tissue blood flow along with arterial dilation. Whole-mount immunostaining showed that VEGF phosphorylated endothelial nitric oxide synthase (eNOS) at residue Ser1177 and disrupted the alignment of vascular endothelial-cadherin (VE-cadherin) around the endothelial cell borders in mouse ear skin, indicating endothelial nitric oxide (NO) production and barrier disruption. Administration of the nitric oxide synthesis inhibitor, L-NAME, as well as the vasoconstrictor phenylephrine, abolished all VEGF-induced responses, including blood flow increase, dye leakage, and tissue swelling. However, these two treatments did not alter the intracellular localization of VE-cadherin-induced by VEGF. These observations underscore the importance of vascular dilation and, subsequent increase in blood flow, as well as, endothelial barrier disruption in the mechanisms of VEGF-induced vascular hyper-permeability.
Collapse
Affiliation(s)
- Kohei Ashina
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Yoshiki Tsubosaka
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Koji Kobayashi
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Keisuke Omori
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Takahisa Murata
- Department of Animal Radiology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
| |
Collapse
|
37
|
Timmerman I, Heemskerk N, Kroon J, Schaefer A, van Rijssel J, Hoogenboezem M, van Unen J, Goedhart J, Gadella TWJ, Yin T, Wu Y, Huveneers S, van Buul JD. A local VE-cadherin and Trio-based signaling complex stabilizes endothelial junctions through Rac1. J Cell Sci 2015; 128:3041-54. [PMID: 26116572 DOI: 10.1242/jcs.168674] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 06/22/2015] [Indexed: 01/08/2023] Open
Abstract
Endothelial cell-cell junctions maintain a restrictive barrier that is tightly regulated to allow dynamic responses to permeability-inducing angiogenic factors, as well as to inflammatory agents and adherent leukocytes. The ability of these stimuli to transiently remodel adherens junctions depends on Rho-GTPase-controlled cytoskeletal rearrangements. How the activity of Rho-GTPases is spatio-temporally controlled at endothelial adherens junctions by guanine-nucleotide exchange factors (GEFs) is incompletely understood. Here, we identify a crucial role for the Rho-GEF Trio in stabilizing junctions based around vascular endothelial (VE)-cadherin (also known as CDH5). Trio interacts with VE-cadherin and locally activates Rac1 at adherens junctions during the formation of nascent contacts, as assessed using a novel FRET-based Rac1 biosensor and biochemical assays. The Rac-GEF domain of Trio is responsible for the remodeling of junctional actin from radial into cortical actin bundles, a crucial step for junction stabilization. This promotes the formation of linear adherens junctions and increases endothelial monolayer resistance. Collectively, our data show the importance of spatio-temporal regulation of the actin cytoskeleton through Trio and Rac1 at VE-cadherin-based cell-cell junctions in the maintenance of the endothelial barrier.
Collapse
Affiliation(s)
- Ilse Timmerman
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Niels Heemskerk
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Jeffrey Kroon
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Antje Schaefer
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Jos van Rijssel
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Mark Hoogenboezem
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Jakobus van Unen
- Swammerdam Institute for Life Sciences, Section of Molecular Cytology, van Leeuwenhoek Centre for Advanced Microscopy, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | - Joachim Goedhart
- Swammerdam Institute for Life Sciences, Section of Molecular Cytology, van Leeuwenhoek Centre for Advanced Microscopy, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | - Theodorus W J Gadella
- Swammerdam Institute for Life Sciences, Section of Molecular Cytology, van Leeuwenhoek Centre for Advanced Microscopy, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | - Taofei Yin
- Center for Cell Analysis and Modelling, University of Connecticut Health Center, Farmington, CT 06032, USA
| | - Yi Wu
- Center for Cell Analysis and Modelling, University of Connecticut Health Center, Farmington, CT 06032, USA
| | - Stephan Huveneers
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| | - Jaap D van Buul
- Department of Molecular Cell Biology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam 1066 CX, The Netherlands
| |
Collapse
|
38
|
Marinković G, Heemskerk N, van Buul JD, de Waard V. The Ins and Outs of Small GTPase Rac1 in the Vasculature. J Pharmacol Exp Ther 2015; 354:91-102. [PMID: 26036474 DOI: 10.1124/jpet.115.223610] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 06/01/2015] [Indexed: 12/16/2022] Open
Abstract
The Rho family of small GTPases forms a 20-member family within the Ras superfamily of GTP-dependent enzymes that are activated by a variety of extracellular signals. The most well known Rho family members are RhoA (Ras homolog gene family, member A), Cdc42 (cell division control protein 42), and Rac1 (Ras-related C3 botulinum toxin substrate 1), which affect intracellular signaling pathways that regulate a plethora of critical cellular functions, such as oxidative stress, cellular contacts, migration, and proliferation. In this review, we describe the current knowledge on the role of GTPase Rac1 in the vasculature. Whereas most recent reviews focus on the role of vascular Rac1 in endothelial cells, in the present review we also highlight the functional involvement of Rac1 in other vascular cells types, namely, smooth muscle cells present in the media and fibroblasts located in the adventitia of the vessel wall. Collectively, this overview shows that Rac1 activity is involved in various functions within one cell type at distinct locations within the cell, and that there are overlapping but also cell type-specific functions in the vasculature. Chronically enhanced Rac1 activity seems to contribute to vascular pathology; however, Rac1 is essential to vascular homeostasis, which makes Rac1 inhibition as a therapeutic option a delicate balancing act.
Collapse
Affiliation(s)
- Goran Marinković
- Department Medical Biochemistry (G.M., V.d.W.) and Department of Molecular Cell Biology (N.H., J.D.v.B.), Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Niels Heemskerk
- Department Medical Biochemistry (G.M., V.d.W.) and Department of Molecular Cell Biology (N.H., J.D.v.B.), Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Jaap D van Buul
- Department Medical Biochemistry (G.M., V.d.W.) and Department of Molecular Cell Biology (N.H., J.D.v.B.), Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Vivian de Waard
- Department Medical Biochemistry (G.M., V.d.W.) and Department of Molecular Cell Biology (N.H., J.D.v.B.), Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| |
Collapse
|
39
|
Rodrigues SF, Granger DN. Blood cells and endothelial barrier function. Tissue Barriers 2015; 3:e978720. [PMID: 25838983 DOI: 10.4161/21688370.2014.978720] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 10/15/2014] [Indexed: 12/18/2022] Open
Abstract
The barrier properties of endothelial cells are critical for the maintenance of water and protein balance between the intravascular and extravascular compartments. An impairment of endothelial barrier function has been implicated in the genesis and/or progression of a variety of pathological conditions, including pulmonary edema, ischemic stroke, neurodegenerative disorders, angioedema, sepsis and cancer. The altered barrier function in these conditions is often linked to the release of soluble mediators from resident cells (e.g., mast cells, macrophages) and/or recruited blood cells. The interaction of the mediators with receptors expressed on the surface of endothelial cells diminishes barrier function either by altering the expression of adhesive proteins in the inter-endothelial junctions, by altering the organization of the cytoskeleton, or both. Reactive oxygen species (ROS), proteolytic enzymes (e.g., matrix metalloproteinase, elastase), oncostatin M, and VEGF are part of a long list of mediators that have been implicated in endothelial barrier failure. In this review, we address the role of blood borne cells, including, neutrophils, lymphocytes, monocytes, and platelets, in the regulation of endothelial barrier function in health and disease. Attention is also devoted to new targets for therapeutic intervention in disease states with morbidity and mortality related to endothelial barrier dysfunction.
Collapse
Key Words
- AJ, Adherens junctions
- ANG-1, Angiopoietin 1
- AQP, Aquaporins
- BBB, blood brain barrier
- CNS, Central nervous system
- COPD, Chronic obstructive pulmonary disease
- EAE, Experimental autoimmune encephalomyelitis
- EPAC1, Exchange protein activated by cyclic AMP
- ERK1/2, Extracellular signal-regulated kinases 1 and 2
- Endothelial barrier
- FA, Focal adhesions
- FAK, focal adhesion tyrosine kinase
- FoxO1, Forkhead box O1
- GAG, Glycosaminoglycans
- GDNF, Glial cell-derived neurotrophic factor
- GJ, Gap junctions
- GPCR, G-protein coupled receptors
- GTPase, Guanosine 5'-triphosphatase
- HMGB-1, High mobility group box 1
- HRAS, Harvey rat sarcoma viral oncogene homolog
- ICAM-1, Intercellular adhesion molecule 1
- IL-1β, Interleukin 1 beta
- IP3, Inositol 1,4,5-triphosphate
- JAM, Junctional adhesion molecules
- MEK, Mitogen-activated protein kinase kinase
- MLC, Myosin light chain
- MLCK, Myosin light-chain kinase
- MMP, Matrix metalloproteinases
- NO, Nitric oxide
- OSM, Oncostatin M
- PAF, Platelet activating factor
- PDE, Phosphodiesterase
- PKA, Protein kinase A
- PNA, Platelet-neutrophil aggregates
- ROS, Reactive oxygen species
- Rac1, Ras-related C3 botulinum toxin substrate 1
- Rap1, Ras-related protein 1
- RhoA, Ras homolog gene family, member A
- S1P, Sphingosine-1-phosphate
- SCID, Severe combined immunodeficient
- SOCS-3, Suppressors of cytokine signaling 3
- Shp-2, Src homology 2 domain-containing phosphatase 2
- Src, Sarcoma family of protein kinases
- TEER, Transendothelial electrical resistance
- TGF-beta1, Transforming growth factor-beta1
- TJ, Tight junctions
- TNF-, Tumor necrosis factor alpha
- VCAM-1, Vascular cell adhesion molecule 1
- VE, Vascular endothelial
- VE-PTP, Vascular endothelial receptor protein tyrosine phosphatase
- VEGF, Vascular endothelial growth factor
- VVO, Vesiculo-vacuolar organelle
- ZO, Zonula occludens
- cAMP, 3'-5'-cyclic adenosine monophosphate
- erythrocytes
- leukocytes
- pSrc, Phosphorylated Src
- platelets
- vascular permeability
Collapse
Affiliation(s)
- Stephen F Rodrigues
- Department of Clinical and Toxicological Analyses; School of Pharmaceutical Sciences; University of Sao Paulo ; Sao Paulo, Brazil
| | - D Neil Granger
- Department of Molecular and Cellular Physiology; Louisiana State University Health Sciences Center ; Shreveport, LA USA
| |
Collapse
|
40
|
Gros A, Ollivier V, Ho-Tin-Noé B. Platelets in inflammation: regulation of leukocyte activities and vascular repair. Front Immunol 2015; 5:678. [PMID: 25610439 PMCID: PMC4285099 DOI: 10.3389/fimmu.2014.00678] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 12/16/2014] [Indexed: 12/29/2022] Open
Abstract
There is now a large body of evidence that platelets are central actors of inflammatory reactions. Indeed, platelets play a significant role in a variety of inflammatory diseases. These diseases include conditions as varied as atherosclerosis, arthritis, dermatitis, glomerulonephritis, or acute lung injury. In this context, one can note that inflammation is a convenient but imprecise catch-all term that is used to cover a wide range of situations. Therefore, when discussing the role of platelets in inflammation, it is important to clearly define the pathophysiological context and the exact stage of the reaction. Inflammatory reactions are indeed multistep processes that can be either acute or chronic, and their sequence can vary greatly depending on the situation and organ concerned. Here, we focus on how platelets contribute to inflammatory reactions involving recruitment of neutrophils and/or macrophages. Specifically, we review past and recent data showing that platelets intervene at various stages of these reactions to regulate parameters such as endothelial permeability, the recruitment of neutrophils and macrophages and their effector functions, as well as inflammatory bleeding. The mechanisms underlying these various modulating effect of platelets are also discussed.
Collapse
Affiliation(s)
- Angèle Gros
- Université Paris Diderot, Sorbonne Paris Cité , Paris , France ; Unit 1148, Laboratory for Vascular Translational Science, INSERM , Paris , France
| | - Véronique Ollivier
- Université Paris Diderot, Sorbonne Paris Cité , Paris , France ; Unit 1148, Laboratory for Vascular Translational Science, INSERM , Paris , France
| | - Benoît Ho-Tin-Noé
- Université Paris Diderot, Sorbonne Paris Cité , Paris , France ; Unit 1148, Laboratory for Vascular Translational Science, INSERM , Paris , France
| |
Collapse
|
41
|
Platelet Activating Factor Receptor Activation Improves siRNA Uptake and RNAi Responses in Well-differentiated Airway Epithelia. MOLECULAR THERAPY. NUCLEIC ACIDS 2014; 3:e175. [PMID: 25025465 PMCID: PMC4121516 DOI: 10.1038/mtna.2014.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 05/09/2014] [Indexed: 01/31/2023]
Abstract
Well-differentiated human airway epithelia present formidable barriers to efficient siRNA delivery. We previously reported that treatment of airway epithelia with specific small molecules improves oligonucleotide uptake and facilitates RNAi responses. Here, we exploited the platelet activating factor receptor (PAFR) pathway, utilized by specific bacteria to transcytose into epithelia, as a trigger for internalization of Dicer-substrate siRNAs (DsiRNA). PAFR is a G-protein coupled receptor which can be engaged and activated by phosphorylcholine residues on the lipooligosaccharide (LOS) of nontypeable Haemophilus influenzae and the teichoic acid of Streptococcus pneumoniae as well as by its natural ligand, platelet activating factor (PAF). When well-differentiated airway epithelia were simultaneously treated with either nontypeable Haemophilus influenzae LOS or PAF and transduced with DsiRNA formulated with the peptide transductin, we observed silencing of both endogenous and exogenous targets. PAF receptor antagonists prevented LOS or PAF-assisted DsiRNA silencing, demonstrating that ligand engagement of PAFR is essential for this process. Additionally, PAF-assisted DsiRNA transfection decreased CFTR protein expression and function and reduced exogenous viral protein levels and titer in human airway epithelia. Treatment with spiperone, a small molecule identified using the Connectivity map database to correlate gene expression changes in response to drug treatment with those associated with PAFR stimulation, also induced silencing. These results suggest that the signaling pathway activated by PAFR binding can be manipulated to facilitate siRNA entry and function in difficult to transfect well-differentiated airway epithelial cells.
Collapse
|
42
|
Peptide XIB13 reduces capillary leak in a rodent burn model. Microvasc Res 2014; 93:98-104. [DOI: 10.1016/j.mvr.2014.04.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/05/2014] [Accepted: 04/08/2014] [Indexed: 11/17/2022]
|
43
|
Amado-Azevedo J, Valent ET, Van Nieuw Amerongen GP. Regulation of the endothelial barrier function: a filum granum of cellular forces, Rho-GTPase signaling and microenvironment. Cell Tissue Res 2014; 355:557-76. [PMID: 24633925 DOI: 10.1007/s00441-014-1828-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/24/2014] [Indexed: 12/20/2022]
Abstract
Although the endothelium is an extremely thin single-cell layer, it performs exceedingly well in preventing blood fluids from leaking into the surrounding tissues. However, specific pathological conditions can affect this cell layer, compromising the integrity of the barrier. Vascular leakage is a hallmark of many cardiovascular diseases and despite its medical importance, no specialized therapies are available to prevent it or reduce it. Small guanosine triphosphatases (GTPases) of the Rho family are known to be key regulators of various aspects of cell behavior and studies have shown that they can exert both positive and negative effects on endothelial barrier integrity. Moreover, extracellular matrix stiffness has now been implicated in the regulation of Rho-GTPase signaling, which has a direct impact on the integrity of endothelial junctions. However, knowledge about both the precise mechanism of this regulation and the individual contribution of the specific regulatory proteins remains fragmentary. In this review, we discuss recent findings concerning the balanced activities of Rho-GTPases and, in particular, aspects of the regulation of the endothelial barrier. We highlight the role of Rho-GTPases in the intimate relationships between biomechanical forces, microenvironmental influences and endothelial intercellular junctions, which are all interwoven in a beautiful filigree-like fashion.
Collapse
Affiliation(s)
- Joana Amado-Azevedo
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, Van den Boechorststraat 7, 1081BT, Amsterdam, The Netherlands
| | | | | |
Collapse
|
44
|
Abstract
This article examines the role of the endothelial cytoskeleton in the lung's ability to restrict fluid and protein to vascular space at normal vascular pressures and thereby to protect lung alveoli from lethal flooding. The barrier properties of microvascular endothelium are dependent on endothelial cell contact with other vessel-wall lining cells and with the underlying extracellular matrix (ECM). Focal adhesion complexes are essential for attachment of endothelium to ECM. In quiescent endothelial cells, the thick cortical actin rim helps determine cell shape and stabilize endothelial adherens junctions and focal adhesions through protein bridges to actin cytoskeleton. Permeability-increasing agonists signal activation of "small GTPases" of the Rho family to reorganize the actin cytoskeleton, leading to endothelial cell shape change, disassembly of cortical actin rim, and redistribution of actin into cytoplasmic stress fibers. In association with calcium- and Src-regulated myosin light chain kinase (MLCK), stress fibers become actinomyosin-mediated contractile units. Permeability-increasing agonists stimulate calcium entry and induce tyrosine phosphorylation of VE-cadherin (vascular endothelial cadherin) and β-catenins to weaken or pull apart endothelial adherens junctions. Some permeability agonists cause latent activation of the small GTPases, Cdc42 and Rac1, which facilitate endothelial barrier recovery and eliminate interendothelial gaps. Under the influence of Cdc42 and Rac1, filopodia and lamellipodia are generated by rearrangements of actin cytoskeleton. These motile evaginations extend endothelial cell borders across interendothelial gaps, and may initiate reannealing of endothelial junctions. Endogenous barrier protective substances, such as sphingosine-1-phosphate, play an important role in maintaining a restrictive endothelial barrier and counteracting the effects of permeability-increasing agonists.
Collapse
Affiliation(s)
- Stephen M Vogel
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, Illinois, USA.
| | | |
Collapse
|
45
|
Predescu S, Knezevic I, Bardita C, Neamu RF, Brovcovych V, Predescu D. Platelet activating factor-induced ceramide micro-domains drive endothelial NOS activation and contribute to barrier dysfunction. PLoS One 2013; 8:e75846. [PMID: 24086643 PMCID: PMC3785431 DOI: 10.1371/journal.pone.0075846] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 08/17/2013] [Indexed: 12/14/2022] Open
Abstract
The spatial and functional relationship between platelet activating factor-receptor (PAF-R) and nitric oxide synthase (eNOS) in the lateral plane of the endothelial plasma membrane is poorly characterized. In this study, we used intact mouse pulmonary endothelial cells (ECs) as well as endothelial plasma membrane patches and subcellular fractions to define a new microdomain of plasmalemma proper where the two proteins colocalize and to demonstrate how PAF-mediated nitric oxide (NO) production fine-tunes ECs function as gatekeepers of vascular permeability. Using fluorescence microscopy and immunogold labeling electron microscopy (EM) on membrane patches we demonstrate that PAF-R is organized as clusters and colocalizes with a subcellular pool of eNOS, outside recognizable vesicular profiles. Moreover, PAF-induced acid sphingomyelinase activation generates a ceramide-based microdomain on the external leaflet of plasma membrane, inside of which a signalosome containing eNOS shapes PAF-stimulated NO production. Real-time measurements of NO after PAF-R ligation indicated a rapid (5 to 15 min) increase in NO production followed by a > 45 min period of reduction to basal levels. Moreover, at the level of this new microdomain, PAF induces a dynamic phosphorylation/dephosphorylation of Ser, Thr and Tyr residues of eNOS that correlates with NO production. Altogether, our findings establish the existence of a functional partnership PAF-R/eNOS on EC plasma membrane, at the level of PAF-induced ceramide plasma membrane microdomains, outside recognized vesicular profiles.
Collapse
Affiliation(s)
- Sanda Predescu
- Department of Pharmacology and Medicine, Division of Pulmonary and Critical Care, Rush University, Chicago, Illinois, United States of America
| | - Ivana Knezevic
- Department of Pharmacology and Medicine, Division of Pulmonary and Critical Care, Rush University, Chicago, Illinois, United States of America
| | - Cristina Bardita
- Department of Pharmacology and Medicine, Division of Pulmonary and Critical Care, Rush University, Chicago, Illinois, United States of America
| | - Radu Florin Neamu
- Division of Pulmonary, Allergy, and Critical Care Medicine, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Viktor Brovcovych
- Department of Pharmacology, University of Illinois, Chicago, Illinois, United States of America
| | - Dan Predescu
- Department of Pharmacology and Medicine, Division of Pulmonary and Critical Care, Rush University, Chicago, Illinois, United States of America
- * E-mail:
| |
Collapse
|
46
|
Crossing the wall: The opening of endothelial cell junctions during infectious diseases. Int J Biochem Cell Biol 2013; 45:1165-73. [DOI: 10.1016/j.biocel.2013.03.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 03/05/2013] [Accepted: 03/15/2013] [Indexed: 12/22/2022]
|
47
|
Ferri N, Bernini SK, Corsini A, Clerici F, Erba E, Stragliotto S, Contini A. 3-Aryl-N-aminoylsulfonylphenyl-1H-pyrazole-5-carboxamides: a new class of selective Rac inhibitors. MEDCHEMCOMM 2013. [DOI: 10.1039/c2md20328f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
48
|
Kather JN, Kroll J. Rho guanine exchange factors in blood vessels: fine-tuners of angiogenesis and vascular function. Exp Cell Res 2012; 319:1289-97. [PMID: 23261542 DOI: 10.1016/j.yexcr.2012.12.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 12/12/2012] [Accepted: 12/13/2012] [Indexed: 01/08/2023]
Abstract
The angiogenic cascade is a multi-step process essential for embryogenesis and other physiological and pathological processes. Rho family GTPases are binary molecular switches and serve as master regulators of various basic cellular processes. Rho GTPases are known to exert important functions in angiogenesis and vascular physiology. These functions demand a tight and context-specific control of cellular processes requiring superordinate control by a multitude of guanine nucleotide exchange factors (GEFs). GEFs display various features enabling them to fine-tune the actions of Rho GTPases in the vasculature: (1) GEFs regulate specific steps of the angiogenic cascade; (2) GEFs show a spatio-temporally specific expression pattern; (3) GEFs differentially regulate endothelial function depending on their subcellular location; (4) GEFs mediate crosstalk between complex signaling cascades and (5) GEFs themselves are regulated by another layer of interacting proteins. The aim of this review is to provide an overview about the role of GEFs in regulating angiogenesis and vascular function and to point out current limitations as well as clinical perspectives.
Collapse
Affiliation(s)
- Jakob Nikolas Kather
- Department of Vascular Biology and Tumor Angiogenesis, Center for Biomedicine and Medical Technology Mannheim (CBTM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | | |
Collapse
|
49
|
Naikawadi RP, Cheng N, Vogel SM, Qian F, Wu D, Malik AB, Ye RD. A critical role for phosphatidylinositol (3,4,5)-trisphosphate-dependent Rac exchanger 1 in endothelial junction disruption and vascular hyperpermeability. Circ Res 2012; 111:1517-27. [PMID: 22965143 DOI: 10.1161/circresaha.112.273078] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
RATIONALE The small GTPase Rac is critical to vascular endothelial functions, yet its regulation in endothelial cells remains unclear. Understanding the upstream pathway may delineate Rac activation mechanisms and its role in maintaining vascular endothelial barrier integrity. OBJECTIVE By investigating phosphatidylinositol (3,4,5)-trisphosphate-dependent Rac exchanger 1 (P-Rex1), one of the Rac-specific guanine nucleotide exchange factors previously known for G protein-coupled receptor signaling, we sought to determine whether Rac-guanine nucleotide exchange factor is nodal for signal integration and potential target for drug intervention. METHODS AND RESULTS Using gene deletion and small interference RNA silencing approach, we investigated the role of P-Rex1 in human lung microvascular endothelial cells. Tumor necrosis factor α (TNF-α) exposure led to disruption of endothelial junctions, and silencing P-Rex1 protected junction integrity. TNF-α stimulated Rac activation and reactive oxygen species production in a P-Rex1-dependent manner. Removal of P-Rex1 significantly reduced intercellular adhesion molecule-1 expression, polymorphonuclear leukocyte transendothelial migration, and leukocyte sequestration in TNF-α-challenged mouse lungs. The P-Rex1 knockout mice were also refractory to lung vascular hyperpermeability and edema in a lipopolysaccharide-induced sepsis model. CONCLUSIONS These results demonstrate for the first time that P-Rex1 expressed in endothelial cells is activated downstream of TNF-α, which is not a G protein-coupled receptor agonist. Our data identify P-Rex1 as a critical mediator of vascular barrier disruption. Targeting P-Rex1 may effectively protect against TNF-α- and lipopolysaccharide-induced endothelial junction disruption and vascular hyperpermeability.
Collapse
Affiliation(s)
- Ram P Naikawadi
- Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612, USA
| | | | | | | | | | | | | |
Collapse
|
50
|
Flasiński M, Broniatowski M, Wydro P, Hąc-Wydro K, Dynarowicz-Łątka P. Behavior of platelet activating factor in membrane-mimicking environment. Langmuir monolayer study complemented with grazing incidence X-ray diffraction and Brewster angle microscopy. J Phys Chem B 2012; 116:10842-55. [PMID: 22834697 DOI: 10.1021/jp302907e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
1-O-octadecyl-2-acetyl-sn-glycero-3-phosphocholine (PAF) belonging to the class of single-chained ether phospholipids is widely known from its essential biological activities. There is a growing body of evidence that some significant aspects of PAF actions are connected with its capability to direct intercalation into biomembranes' environment. Although this mechanism is of great importance in the perspective of understanding PAF implications in various physiological processes, in the literature, there is a lack of studies devoted to this subject. It is still unknown which is the exact influence of membrane composition, molecular organization, and its other properties on the PAF impact on cells and tissues. Unfortunately, the biological studies carried out on cell cultures do not provide satisfactory results, mainly because of the complexity of natural systems. In order to obtain insight into the behavior of PAF in a lipid environment at the molecular level, the application of appropriate model systems is required. Among them, Langmuir monolayers are very often applied as a simple but very efficient platform for studies of the interactions between membrane lipids. In the present paper, special attention is focused on the issue concerning the interactions between PAF and two representatives of membrane components occurring mainly in the outer leaflet of natural bilayers, namely, cholesterol and DPPC. The application of Langmuir monolayers enabled us to construct the effective model mimicking the exogenous incorporation of PAF into membrane environment. On the basis of the obtained results, a thorough discussion was carried out and the conclusions derived from the traditional thermodynamic analysis were confronted with microscopic analysis of surface domains and the GIXD results. The selection of experimental techniques enables us to obtain information regarding the miscibility and interactions in the binary mixed films as well as the molecular organization of film-forming molecules on water surface. The experiments revealed that the addition of the investigated single-chained ether phospholipid into both cholesterol and DPPC monolayers causes a considerable decrease of monolayer condensation. On the basis of thermodynamic analysis, it was found that PAF mixes and consequently interacts strongly with cholesterol, whereas its interactions with DPPC are thermodynamically unfavorable. Differences between the PAF influence on cholesterol and DPPC monolayer found its corroboration in the results obtained with the GIXD technique. Namely, the monolayer of DPPC can incorporate more PAF than the model membrane containing cholesterol. The obtained results indicate that short chained sn-2 ether phospholipid is able to modify model membrane properties in a concentration-dependent way.
Collapse
Affiliation(s)
- Michał Flasiński
- Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland.
| | | | | | | | | |
Collapse
|