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Motta G, Juliano L, Chagas JR. Human plasma kallikrein: roles in coagulation, fibrinolysis, inflammation pathways, and beyond. Front Physiol 2023; 14:1188816. [PMID: 37711466 PMCID: PMC10499198 DOI: 10.3389/fphys.2023.1188816] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/15/2023] [Indexed: 09/16/2023] Open
Abstract
Human plasma kallikrein (PKa) is obtained by activating its precursor, prekallikrein (PK), historically named the Fletcher factor. Human PKa and tissue kallikreins are serine proteases from the same family, having high- and low-molecular weight kininogens (HKs and LKs) as substrates, releasing bradykinin (Bk) and Lys-bradykinin (Lys-Bk), respectively. This review presents a brief history of human PKa with details and recent observations of its evolution among the vertebrate coagulation proteins, including the relations with Factor XI. We explored the role of Factor XII in activating the plasma kallikrein-kinin system (KKS), the mechanism of activity and control in the KKS, and the function of HK on contact activation proteins on cell membranes. The role of human PKa in cell biology regarding the contact system and KSS, particularly the endothelial cells, and neutrophils, in inflammatory processes and infectious diseases, was also approached. We examined the natural plasma protein inhibitors, including a detailed survey of human PKa inhibitors' development and their potential market.
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Affiliation(s)
- Guacyara Motta
- Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Luiz Juliano
- Departamento de Biofisica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jair Ribeiro Chagas
- Departamento de Biofisica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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2
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Oliveira AC, Vicentino ARR, Andrade D, Pereira IR, Saboia-Vahia L, Moreira ODC, Carvalho-Pinto CE, Mota JBD, Maciel L, Vilar-Pereira G, Pesquero JB, Lannes-Vieira J, Sirois P, Campos de Carvalho AC, Scharfstein J. Genetic Ablation and Pharmacological Blockade of Bradykinin B1 Receptor Unveiled a Detrimental Role for the Kinin System in Chagas Disease Cardiomyopathy. J Clin Med 2023; 12:jcm12082888. [PMID: 37109224 PMCID: PMC10144326 DOI: 10.3390/jcm12082888] [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: 02/16/2023] [Revised: 03/24/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Chagas disease, the parasitic infection caused by Trypanosoma cruzi, afflicts about 6 million people in Latin America. Here, we investigated the hypothesis that T. cruzi may fuel heart parasitism by activating B1R, a G protein-coupled (brady) kinin receptor whose expression is upregulated in inflamed tissues. Studies in WT and B1R-/- mice showed that T. cruzi DNA levels (15 days post infection-dpi) were sharply reduced in the transgenic heart. FACS analysis revealed that frequencies of proinflammatory neutrophils and monocytes were diminished in B1R-/- hearts whereas CK-MB activity (60 dpi) was exclusively detected in B1R+/+ sera. Since chronic myocarditis and heart fibrosis (90 dpi) were markedly attenuated in the transgenic mice, we sought to determine whether a pharmacological blockade of the des-Arg9-bradykinin (DABK)/B1R pathway might alleviate chagasic cardiomyopathy. Using C57BL/6 mice acutely infected by a myotropic T. cruzi strain (Colombian), we found that daily treatment (15-60 dpi) with R-954 (B1R antagonist) reduced heart parasitism and blunted cardiac injury. Extending R-954 treatment to the chronic phase (120-160 dpi), we verified that B1R targeting (i) decreased mortality indexes, (ii) mitigated chronic myocarditis, and (iii) ameliorated heart conduction disturbances. Collectively, our study suggests that a pharmacological blockade of the proinflammatory KKS/DABK/B1R pathway is cardioprotective in acute and chronic Chagas disease.
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Affiliation(s)
- Ana Carolina Oliveira
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Amanda Roberta Revoredo Vicentino
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Daniele Andrade
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Isabela Resende Pereira
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Laboratório de Biologia das Interações, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
| | - Leonardo Saboia-Vahia
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Otacílio da Cruz Moreira
- Plataforma de PCR em Tempo Real RPT09A, Laboratório de Virologia Molecular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
| | - Carla Eponina Carvalho-Pinto
- Departamento de Imunobiologia, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24020-141, Brazil
| | - Julia Barbalho da Mota
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Leonardo Maciel
- Programa de Medicina Regenerativa, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Núcleo Multidisciplinar de Pesquisa em Biologia, Universidade Federal do Rio de Janeiro, Duque de Caxias Campus, Rio de Janeiro 21941-902, Brazil
| | - Glaucia Vilar-Pereira
- Laboratório de Biologia das Interações, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
| | - João B Pesquero
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo 05508-090, Brazil
| | - Joseli Lannes-Vieira
- Laboratório de Biologia das Interações, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil
| | - Pierre Sirois
- Department of Microbiology and Immunology, Faculty of Medicine, Université Laval, Quebec, QC G1V 0A6, Canada
| | - Antônio Carlos Campos de Carvalho
- Programa de Medicina Regenerativa, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Centro Nacional de Biologia Estrutural e Bio-Imagem, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, Rio de Janeiro 21941-902, Brazil
| | - Julio Scharfstein
- Programa de Imunobiologia, Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
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Krysko O, Bourne JH, Kondakova E, Galova EA, Whitworth K, Newby ML, Bachert C, Hill H, Crispin M, Stamataki Z, Cunningham AF, Pugh M, Khan AO, Rayes J, Vedunova M, Krysko DV, Brill A. Severity of SARS-CoV-2 infection is associated with high numbers of alveolar mast cells and their degranulation. Front Immunol 2022; 13:968981. [PMID: 36225927 PMCID: PMC9548604 DOI: 10.3389/fimmu.2022.968981] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/05/2022] [Indexed: 11/25/2022] Open
Abstract
Background The systemic inflammatory response post-SARS-CoV-2 infection increases pro-inflammatory cytokine production, multi-organ damage, and mortality rates. Mast cells (MC) modulate thrombo-inflammatory disease progression (e.g., deep vein thrombosis) and the inflammatory response post-infection. Objective To enhance our understanding of the contribution of MC and their proteases in SARS-CoV-2 infection and the pathogenesis of the disease, which might help to identify novel therapeutic targets. Methods MC proteases chymase (CMA1), carboxypeptidase A3 (CPA3), and tryptase beta 2 (TPSB2), as well as cytokine levels, were measured in the serum of 60 patients with SARS-CoV-2 infection (30 moderate and 30 severe; severity of the disease assessed by chest CT) and 17 healthy controls by ELISA. MC number and degranulation were quantified by immunofluorescent staining for tryptase in lung autopsies of patients deceased from either SARS-CoV-2 infection or unrelated reasons (control). Immortalized human FcεR1+c-Kit+ LUVA MC were infected with SARS-CoV-2, or treated with its viral proteins, to assess direct MC activation by flow cytometry. Results The levels of all three proteases were increased in the serum of patients with COVID-19, and strongly correlated with clinical severity. The density of degranulated MC in COVID-19 lung autopsies was increased compared to control lungs. The total number of released granules and the number of granules per each MC were elevated and positively correlated with von Willebrand factor levels in the lung. SARS-CoV-2 or its viral proteins spike and nucleocapsid did not induce activation or degranulation of LUVA MC in vitro. Conclusion In this study, we demonstrate that SARS-CoV-2 is strongly associated with activation of MC, which likely occurs indirectly, driven by the inflammatory response. The results suggest that plasma MC protease levels could predict the disease course, and that severe COVID-19 patients might benefit from including MC-stabilizing drugs in the treatment scheme.
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Affiliation(s)
- Olga Krysko
- Upper Airways Research Laboratory, Department of Head and Skin, Ghent University, Ghent, Belgium
| | - Joshua H. Bourne
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Elena Kondakova
- Institute of Biology and Biomedicine, Department of Basic and Medical Genetics, National Research Lobachevsky State University of Nizhniy Novgorod, Nizhniy Novgorod, Russia
| | - Elena A. Galova
- University Clinic of Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Katharine Whitworth
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Maddy L. Newby
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Claus Bachert
- Upper Airways Research Laboratory, Department of Head and Skin, Ghent University, Ghent, Belgium
| | - Harriet Hill
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Max Crispin
- School of Biological Sciences, University of Southampton, Southampton, United Kingdom
| | - Zania Stamataki
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Adam F. Cunningham
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Matthew Pugh
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Abdullah O. Khan
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Julie Rayes
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Maria Vedunova
- Institute of Biology and Biomedicine, Department of Basic and Medical Genetics, National Research Lobachevsky State University of Nizhniy Novgorod, Nizhniy Novgorod, Russia
| | - Dmitri V. Krysko
- Institute of Biology and Biomedicine, Department of Basic and Medical Genetics, National Research Lobachevsky State University of Nizhniy Novgorod, Nizhniy Novgorod, Russia
- Department of Pathophysiology, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Cell Death Investigation and Therapy Laboratory, Department of Human Structure and Repair, Ghent University and Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Alexander Brill
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
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Nagashima S, Dutra AA, Arantes MP, Zeni RC, Klein CK, de Oliveira FC, Piper GW, Brenny ID, Pereira MRC, Stocco RB, Martins APC, de Castro EM, Vaz de Paula CB, Amaral ANM, Machado-Souza C, Baena CP, Noronha L. COVID-19 and Lung Mast Cells: The Kallikrein-Kinin Activation Pathway. Int J Mol Sci 2022; 23:1714. [PMID: 35163636 PMCID: PMC8836064 DOI: 10.3390/ijms23031714] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/28/2022] [Accepted: 01/28/2022] [Indexed: 01/27/2023] Open
Abstract
Mast cells (MCs) have relevant participation in inflammatory and vascular hyperpermeability events, responsible for the action of the kallikrein-kinin system (KKS), that affect patients inflicted by the severe form of COVID-19. Given a higher number of activated MCs present in COVID-19 patients and their association with vascular hyperpermeability events, we investigated the factors that lead to the activation and degranulation of these cells and their harmful effects on the alveolar septum environment provided by the action of its mediators. Therefore, the pyroptotic processes throughout caspase-1 (CASP-1) and alarmin interleukin-33 (IL-33) secretion were investigated, along with the immunoexpression of angiotensin-converting enzyme 2 (ACE2), bradykinin receptor B1 (B1R) and bradykinin receptor B2 (B2R) on post-mortem lung samples from 24 patients affected by COVID-19. The results were compared to 10 patients affected by H1N1pdm09 and 11 control patients. As a result of the inflammatory processes induced by SARS-CoV-2, the activation by immunoglobulin E (IgE) and degranulation of tryptase, as well as Toluidine Blue metachromatic (TB)-stained MCs of the interstitial and perivascular regions of the same groups were also counted. An increased immunoexpression of the tissue biomarkers CASP-1, IL-33, ACE2, B1R and B2R was observed in the alveolar septum of the COVID-19 patients, associated with a higher density of IgE+ MCs, tryptase+ MCs and TB-stained MCs, in addition to the presence of intra-alveolar edema. These findings suggest the direct correlation of MCs with vascular hyperpermeability, edema and diffuse alveolar damage (DAD) events that affect patients with a severe form of this disease. The role of KKS activation in events involving the exacerbated increase in vascular permeability and its direct link with the conditions that precede intra-alveolar edema, and the consequent DAD, is evidenced. Therapy with drugs that inhibit the activation/degranulation of MCs can prevent the worsening of the prognosis and provide a better outcome for the patient.
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Affiliation(s)
- Seigo Nagashima
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Anderson Azevedo Dutra
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Mayara Pezzini Arantes
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Rafaela Chiuco Zeni
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Carolline Konzen Klein
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Flávia Centenaro de Oliveira
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Giulia Werner Piper
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Isadora Drews Brenny
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Marcos Roberto Curcio Pereira
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Rebecca Benicio Stocco
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Ana Paula Camargo Martins
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Eduardo Morais de Castro
- Postgraduate Program in Biotechnology Applied in Health of Children and Adolescent, Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, Brazil; (E.M.d.C.); (C.M.-S.)
| | - Caroline Busatta Vaz de Paula
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Andréa Novaes Moreno Amaral
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
| | - Cleber Machado-Souza
- Postgraduate Program in Biotechnology Applied in Health of Children and Adolescent, Instituto de Pesquisa Pelé Pequeno Príncipe, Faculdades Pequeno Príncipe, Curitiba 80250-060, Brazil; (E.M.d.C.); (C.M.-S.)
| | - Cristina Pellegrino Baena
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
- Marcelino Champagnat Hospital, Curitiba 80020-110, Brazil
| | - Lucia Noronha
- Postgraduate Program of Health Sciences, School of Medicine, Pontifícia Universidade Católica do Paraná, Curitiba 80910-215, Brazil; (A.A.D.); (M.P.A.); (R.C.Z.); (C.K.K.); (F.C.d.O.); (G.W.P.); (I.D.B.); (M.R.C.P.); (R.B.S.); (A.P.C.M.); (C.B.V.d.P.); (A.N.M.A.); (C.P.B.)
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5
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Vellasco L, Svensjö E, Bulant CA, Blanco PJ, Nogueira F, Domont G, de Almeida NP, Nascimento CR, Silva-dos-Santos D, Carvalho-Pinto CE, Medei EH, Almeida IC, Scharfstein J. Sheltered in Stromal Tissue Cells, Trypanosoma cruzi Orchestrates Inflammatory Neovascularization via Activation of the Mast Cell Chymase Pathway. Pathogens 2022; 11:pathogens11020187. [PMID: 35215131 PMCID: PMC8878313 DOI: 10.3390/pathogens11020187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 12/04/2022] Open
Abstract
Microangiopathy may worsen the clinical outcome of Chagas disease. Given the obstacles to investigating the dynamics of inflammation and angiogenesis in heart tissues parasitized by Trypanosoma cruzi, here we used intravital microscopy (IVM) to investigate microcirculatory alterations in the hamster cheek pouch (HCP) infected by green fluorescent protein-expressing T. cruzi (GFP-T. cruzi). IVM performed 3 days post-infection (3 dpi) consistently showed increased baseline levels of plasma extravasation. Illustrating the reciprocal benefits that microvascular leakage brings to the host-parasite relationship, these findings suggest that intracellular amastigotes, acting from inside out, stimulate angiogenesis while enhancing the delivery of plasma-borne nutrients and prosurvival factors to the infection foci. Using a computer-based analysis of images (3 dpi), we found that proangiogenic indexes were positively correlated with transcriptional levels of proinflammatory cytokines (pro-IL1β and IFN-γ). Intracellular GFP-parasites were targeted by delaying for 24 h the oral administration of the trypanocidal drug benznidazole. A classification algorithm showed that benznidazole (>24 h) blunted angiogenesis (7 dpi) in the HCP. Unbiased proteomics (3 dpi) combined to pharmacological targeting of chymase with two inhibitors (chymostatin and TY-51469) linked T. cruzi-induced neovascularization (7 dpi) to the proangiogenic activity of chymase, a serine protease stored in secretory granules from mast cells.
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Affiliation(s)
- Lucas Vellasco
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Erik Svensjö
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Carlos Alberto Bulant
- Department of Mathematical and Computational Methods, National Laboratory for Scientific Computing, Petrópolis 25651-075, Brazil; (C.A.B.); (P.J.B.)
| | - Pablo Javier Blanco
- Department of Mathematical and Computational Methods, National Laboratory for Scientific Computing, Petrópolis 25651-075, Brazil; (C.A.B.); (P.J.B.)
| | - Fábio Nogueira
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Gilberto Domont
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Natália Pinto de Almeida
- Department of Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (F.N.); (G.D.); (N.P.d.A.)
| | - Clarissa Rodrigues Nascimento
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Danielle Silva-dos-Santos
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | | | - Emiliano Horácio Medei
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
| | - Igor C. Almeida
- Department of Biological Sciences, Border Biomedical Research Center, University of Texas at El Paso, El Paso, TX 79968, USA;
| | - Julio Scharfstein
- Department of Immunobiology, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (E.S.); (C.R.N.); (D.S.-d.-S.); (E.H.M.)
- Correspondence:
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6
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Pérez-Campos Mayoral L, Hernández-Huerta MT, Papy-García D, Barritault D, Zenteno E, Sánchez Navarro LM, Pérez-Campos Mayoral E, Matias Cervantes CA, Martínez Cruz M, Mayoral Andrade G, López Cervantes M, Vázquez Martínez G, López Sánchez C, Pina Canseco S, Martínez Cruz R, Pérez-Campos E. Immunothrombotic dysregulation in chagas disease and COVID-19: a comparative study of anticoagulation. Mol Cell Biochem 2021; 476:3815-3825. [PMID: 34110554 PMCID: PMC8190527 DOI: 10.1007/s11010-021-04204-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/03/2021] [Indexed: 12/27/2022]
Abstract
Chagas and COVID-19 are diseases caused by Trypanosoma cruzi and SARS-CoV-2, respectively. These diseases present very different etiological agents despite showing similarities such as susceptibility/risk factors, pathogen-associated molecular patterns (PAMPs), recognition of glycosaminoglycans, inflammation, vascular leakage hypercoagulability, microthrombosis, and endotheliopathy; all of which suggest, in part, treatments with similar principles. Here, both diseases are compared, focusing mainly on the characteristics related to dysregulated immunothrombosis. Given the in-depth investigation of molecules and mechanisms related to microthrombosis in COVID-19, it is necessary to reconsider a prompt treatment of Chagas disease with oral anticoagulants.
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Affiliation(s)
- Laura Pérez-Campos Mayoral
- Centro de Investigación Facultad de Medicina UNAM-UABJO, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, 68020, México
| | | | | | | | - Edgar Zenteno
- Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, 04360, México
| | | | - Eduardo Pérez-Campos Mayoral
- Centro de Investigación Facultad de Medicina UNAM-UABJO, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, 68020, México
| | | | | | - Gabriel Mayoral Andrade
- Centro de Investigación Facultad de Medicina UNAM-UABJO, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, 68020, México
| | | | | | - Claudia López Sánchez
- Tecnológico Nacional de México / Instituto Tecnológico de Oaxaca, Oaxaca, 68030, México
| | - Socorro Pina Canseco
- Centro de Investigación Facultad de Medicina UNAM-UABJO, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, 68020, México
| | - Ruth Martínez Cruz
- Centro de Investigación Facultad de Medicina UNAM-UABJO, Facultad de Medicina y Cirugía, Universidad Autónoma Benito Juárez de Oaxaca, Oaxaca, 68020, México
| | - Eduardo Pérez-Campos
- Tecnológico Nacional de México / Instituto Tecnológico de Oaxaca, Oaxaca, 68030, México. .,Laboratorio de Patología Clínica "Eduardo Pérez Ortega", Oaxaca, 68000, México.
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7
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P2Y14 Receptor as a Target for Neutrophilia Attenuation in Severe COVID-19 Cases: From Hematopoietic Stem Cell Recruitment and Chemotaxis to Thrombo-inflammation. Stem Cell Rev Rep 2021; 17:241-252. [PMID: 33575962 PMCID: PMC7877512 DOI: 10.1007/s12015-021-10129-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2021] [Indexed: 02/08/2023]
Abstract
The global SARS-CoV-2 pandemic starting in 2019 has already reached more than 2.3 million deaths. Despite the scientific community’s efforts to investigate the COVID-19 disease, a drug for effectively treating or curing patients yet needs to be discovered. Hematopoietic stem cells (HSC) differentiating into immune cells for defense express COVID-19 entry receptors, and COVID-19 infection hinders their differentiation. The importance of purinergic signaling in HSC differentiation and innate immunity has been recognized. The metabotropic P2Y14 receptor subtype, activated by UDP-glucose, controls HSC differentiation and mobilization. Thereon, the exacerbated activation of blood immune cells amplifies the inflammatory state observed in COVID-19 patients, specially through the continuous release of reactive oxygen species and extracellular neutrophil traps (NETs). Further, the P2Y14 subtype, robustly inhibits the infiltration of neutrophils into various epithelial tissues, including lungs and kidneys. Here we discuss findings suggesting that antagonism of the P2Y14 receptor could prevent the progression of COVID-19-induced systemic inflammation, which often leads to severe illness and death cases. Considering the modulation of neutrophil recruitment of extreme relevance for respiratory distress and lung failure prevention, we propose that P2Y14 receptor inhibition by its selective antagonist PPTN could limit neutrophil recruitment and NETosis, hence limiting excessive formation of oxygen reactive species and proteolytic activation of the kallikrein-kinin system and subsequent bradykinin storm in the alveolar septa of COVID-19 patients.
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8
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Coelho SVA, Rust NM, Vellasco L, Papa MP, Pereira ASG, da Silva Palazzo MF, Juliano MA, Costa SM, Alves AMB, Cordeiro MT, Marques ETA, Scharfstein J, de Arruda LB. Contact System Activation in Plasma from Dengue Patients Might Harness Endothelial Virus Replication through the Signaling of Bradykinin Receptors. Pharmaceuticals (Basel) 2021; 14:ph14010056. [PMID: 33445640 PMCID: PMC7827195 DOI: 10.3390/ph14010056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 01/06/2021] [Indexed: 02/06/2023] Open
Abstract
Since exacerbated inflammation and microvascular leakage are hallmarks of dengue virus (DENV) infection, here we interrogated whether systemic activation of the contact/kallikrein-kinin system (KKS) might hamper endothelial function. In vitro assays showed that dextran sulfate, a potent contact activator, failed to generate appreciable levels of activated plasma kallikrein (PKa) in the large majority of samples from a dengue cohort (n = 70), irrespective of severity of clinical symptoms. Impaired formation of PKa in dengue-plasmas correlated with the presence of cleaved Factor XII and high molecular weight kininogen (HK), suggesting that the prothrombogenic contact system is frequently triggered during the course of infection. Using two pathogenic arboviruses, DENV or Zika virus (ZIKV), we then asked whether exogenous BK could influence the outcome of infection of human brain microvascular endothelial cells (HBMECs). Unlike the unresponsive phenotype of Zika-infected HBMECs, we found that BK, acting via B2R, vigorously stimulated DENV-2 replication by reverting nitric oxide-driven apoptosis of endothelial cells. Using the mouse model of cerebral dengue infection, we next demonstrated that B2R targeting by icatibant decreased viral load in brain tissues. In summary, our study suggests that contact/KKS activation followed by BK-induced enhancement of DENV replication in the endothelium may underlie microvascular pathology in dengue.
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Affiliation(s)
- Sharton V. A. Coelho
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (S.V.A.C.); (N.M.R.); (M.P.P.); (A.S.G.P.)
| | - Naiara M. Rust
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (S.V.A.C.); (N.M.R.); (M.P.P.); (A.S.G.P.)
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (M.F.d.S.P.)
| | - Lucas Vellasco
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (M.F.d.S.P.)
| | - Michelle P. Papa
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (S.V.A.C.); (N.M.R.); (M.P.P.); (A.S.G.P.)
| | - Aline S. G. Pereira
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (S.V.A.C.); (N.M.R.); (M.P.P.); (A.S.G.P.)
| | - Matheus Ferreira da Silva Palazzo
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (M.F.d.S.P.)
| | - Maria Aparecida Juliano
- Departamento de Biofísica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo 04023-062, Brazil;
| | - Simone M. Costa
- Laboratório de Biotecnologia e Fisiologia de Infecções Virais, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (S.M.C.); (A.M.B.A.)
| | - Ada M. B. Alves
- Laboratório de Biotecnologia e Fisiologia de Infecções Virais, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil; (S.M.C.); (A.M.B.A.)
| | - Marli T. Cordeiro
- Fundação Oswaldo Cruz, Instituto Aggeu Magalhães, Recife 50740-465, Brazil; (M.T.C.); (E.T.A.M.)
| | - Ernesto T. A. Marques
- Fundação Oswaldo Cruz, Instituto Aggeu Magalhães, Recife 50740-465, Brazil; (M.T.C.); (E.T.A.M.)
- Department of Infectious Diseases, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Júlio Scharfstein
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (L.V.); (M.F.d.S.P.)
- Correspondence: (J.S.); (L.B.d.A.)
| | - Luciana B. de Arruda
- Departamento de Virologia, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, Brazil; (S.V.A.C.); (N.M.R.); (M.P.P.); (A.S.G.P.)
- Correspondence: (J.S.); (L.B.d.A.)
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9
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Pérez-Mazliah D, Ward AI, Lewis MD. Host-parasite dynamics in Chagas disease from systemic to hyper-local scales. Parasite Immunol 2020; 43:e12786. [PMID: 32799361 DOI: 10.1111/pim.12786] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 12/14/2022]
Abstract
Trypanosoma cruzi is a remarkably versatile parasite. It can parasitize almost any nucleated cell type and naturally infects hundreds of mammal species across much of the Americas. In humans, it is the cause of Chagas disease, a set of mainly chronic conditions predominantly affecting the heart and gastrointestinal tract, which can progress to become life threatening. Yet around two thirds of infected people are long-term asymptomatic carriers. Clinical outcomes depend on many factors, but the central determinant is the nature of the host-parasite interactions that play out over the years of chronic infection in diverse tissue environments. In this review, we aim to integrate recent developments in the understanding of the spatial and temporal dynamics of T. cruzi infections with established and emerging concepts in host immune responses in the corresponding phases and tissues.
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Affiliation(s)
- Damián Pérez-Mazliah
- York Biomedical Research Institute, Hull York Medical School, University of York, York, UK
| | - Alexander I Ward
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Michael D Lewis
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
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10
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Motta Junior JDS, Miggiolaro AFRDS, Nagashima S, de Paula CBV, Baena CP, Scharfstein J, de Noronha L. Mast Cells in Alveolar Septa of COVID-19 Patients: A Pathogenic Pathway That May Link Interstitial Edema to Immunothrombosis. Front Immunol 2020; 11:574862. [PMID: 33042157 PMCID: PMC7530169 DOI: 10.3389/fimmu.2020.574862] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 08/27/2020] [Indexed: 12/22/2022] Open
Abstract
It is currently believed that innate immunity is unable to prevent the spread of SARS-CoV-2 from the upper airways to the alveoli of high-risk groups of patients. SARS-CoV-2 replication in ACE-2-expressing pneumocytes can drive the diffuse alveolar injury through the cytokine storm and immunothrombosis by upregulating the transcription of chemokine/cytokines, unlike several other respiratory viruses. Here we report histopathology data obtained in post-mortem lung biopsies of COVID-19, showing the increased density of perivascular and septal mast cells (MCs) and IL-4-expressing cells (n = 6), in contrast to the numbers found in pandemic H1N1-induced pneumonia (n = 10) or Control specimens (n = 10). Noteworthy, COVID-19 lung biopsies showed a higher density of CD117+ cells, suggesting that c-kit positive MCs progenitors were recruited earlier to the alveolar septa. These findings suggest that MC proliferation/differentiation in the alveolar septa might be harnessed by the shift toward IL-4 expression in the inflamed alveolar septa. Future studies may clarify whether the fibrin-dependent generation of the hyaline membrane, processes that require the diffusion of procoagulative plasma factors into the alveolar lumen and the endothelial dysfunction, are preceded by MC-driven formation of interstitial edema in the alveolar septa.
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Affiliation(s)
- Jarbas da Silva Motta Junior
- School of Medicine, Pontifícia Universidade Católica do Paraná PUCPR, Curitiba, Brazil.,Hospital Marcelino Champagnat, Curitiba, Brazil
| | | | - Seigo Nagashima
- School of Medicine, Pontifícia Universidade Católica do Paraná PUCPR, Curitiba, Brazil
| | | | - Cristina Pellegrino Baena
- School of Medicine, Pontifícia Universidade Católica do Paraná PUCPR, Curitiba, Brazil.,Hospital Marcelino Champagnat, Curitiba, Brazil
| | - Julio Scharfstein
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lucia de Noronha
- School of Medicine, Pontifícia Universidade Católica do Paraná PUCPR, Curitiba, Brazil
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11
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Dagnino APA, Campos MM, Silva RBM. Kinins and Their Receptors in Infectious Diseases. Pharmaceuticals (Basel) 2020; 13:ph13090215. [PMID: 32867272 PMCID: PMC7558425 DOI: 10.3390/ph13090215] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 01/08/2023] Open
Abstract
Kinins and their receptors have been implicated in a series of pathological alterations, representing attractive pharmacological targets for several diseases. The present review article aims to discuss the role of the kinin system in infectious diseases. Literature data provides compelling evidence about the participation of kinins in infections caused by diverse agents, including viral, bacterial, fungal, protozoan, and helminth-related ills. It is tempting to propose that modulation of kinin actions and production might be an adjuvant strategy for management of infection-related complications.
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12
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COX-2 in liver fibrosis. Clin Chim Acta 2020; 506:196-203. [PMID: 32184095 DOI: 10.1016/j.cca.2020.03.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/13/2020] [Accepted: 03/13/2020] [Indexed: 02/07/2023]
Abstract
As a vital inducible sensor, cyclooxygenase-2 (COX-2) plays an important role in the progress of hepatic fibrogenesis. Activation of hepatic stellate cells (HSCs) in the liver can significantly accelerate the onset and development of liver fibrosis. COX-2 overexpression triggers inflammation that is an important inducer in hepatic fibrosis. Increasing evidence indicates that COX-2 is involved in the main pathogenesis of liver fibrosis, such as inflammation, apoptosis, and cell senescence. Moreover, COX-2 expression is altered in patients and animal models with non-alcoholic fatty liver disease or cirrhosis. These findings suggest that COX-2 has a broad and critical role in the development of liver fibrosis. In this review, we summarize the latest advances in the regulation and signal transduction of COX-2 and its impact on liver fibrosis.
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13
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Silva LS, Pinheiro AS, Teixeira DE, Silva-Aguiar RP, Peruchetti DB, Scharfstein J, Caruso-Neves C, Pinheiro AAS. Kinins Released by Erythrocytic Stages of Plasmodium falciparum Enhance Adhesion of Infected Erythrocytes to Endothelial Cells and Increase Blood Brain Barrier Permeability via Activation of Bradykinin Receptors. Front Med (Lausanne) 2019; 6:75. [PMID: 31058153 PMCID: PMC6478011 DOI: 10.3389/fmed.2019.00075] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 03/27/2019] [Indexed: 12/13/2022] Open
Abstract
Background:Plasmodium falciparum, the etiologic agent of malaria, is a major cause of infant death in Africa. Although research on the contact system has been revitalized by recent discoveries in the field of thrombosis, limited efforts were done to investigate the role of its proinflammatory arm, the kallikrein kinin system (KKS), in the pathogenesis of neglected parasitic diseases, such as malaria. Owing to the lack of animal models, the dynamics of central nervous system (CNS) pathology caused by the sequestration of erythrocytic stages of P. falciparum is not fully understood. Given the precedent that kinins destabilize the blood brain barrier (BBB) in ischemic stroke, here we sought to determine whether Plasmodium falciparum infected erythrocytes (Pf-iRBC) conditioned medium enhances parasite sequestration and impairs BBB integrity via activation of the kallikrein kinin system (KKS). Methods: Monolayers of human brain endothelial cell line (BMECs) are preincubated with the conditioned medium from Pf-iRBCs or RBCs (controls) in the presence or absence of HOE-140 or DALBK, antagonists of bradykinin receptor B2 (B2R) and bradykinin receptor B1 (B1R), respectively. Following washing, the treated monolayers are incubated with erythrocytes, infected or not with P. falciparum mature forms, to examine whether the above treatment (i) has impact on the adhesion of Pf-iRBC to BMEC monolayer, (ii) increases the macromolecular permeability of the tracer BSA-FITC, and (iii) modifies the staining pattern of junctional proteins (ZO-1 and β-catenin). Results: We found that kinins generated in the parasite conditioned medium, acting via bradykinin B2 and/or B1 receptors (i) enhanced Pf-iRBC adhesion to the endothelium monolayer and (ii) impaired the endothelial junctions formed by ZO-1 and β-catenin, consequently disrupting the integrity of the BBB. Conclusions: Our studies raise the possibility that therapeutic targeting of kinin forming enzymes and/or endothelial bradykinin receptors might reduce extent of Pf-iRBC sequestration and help to preserve BBB integrity in cerebral malaria (CM).
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Affiliation(s)
- Leandro S Silva
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alessandro S Pinheiro
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Douglas E Teixeira
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rodrigo P Silva-Aguiar
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Diogo B Peruchetti
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Julio Scharfstein
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Celso Caruso-Neves
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,Instituto Nacional de Ciência e Tecnologia em Medicina Regenerativa, INCT-Regenera, Conselho Nacional de Pesquisa e Desenvolvimento (CNPq), Rio de Janeiro, Brazil
| | - Ana Acacia S Pinheiro
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
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