1
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Castanheira FVS, Nguyen R, Willson M, Davoli-Ferreira M, David BA, Kelly MM, Lee WY, Kratofil RM, Zhang WX, Bui-Marinos M, Corcoran JA, Kubes P. Intravital imaging of three different microvascular beds in SARS-CoV-2-infected mice. Blood Adv 2023; 7:4170-4181. [PMID: 37307197 PMCID: PMC10284260 DOI: 10.1182/bloodadvances.2022009430] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 05/08/2023] [Accepted: 05/29/2023] [Indexed: 06/14/2023] Open
Abstract
Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) enters the respiratory tract, where it infects the alveoli epithelial lining. However, patients have sequelae that extend well beyond the alveoli into the pulmonary vasculature and, perhaps, beyond to the brain and other organs. Because of the dynamic events within blood vessels, histology does not report platelet and neutrophil behavior. Because of the rapid nontranscriptional response of these cells, neither single-cell RNA sequencing nor proteomics report robustly on their critical behaviors. We used intravital microscopy in level-3 containment to examine the pathogenesis of SARS-CoV-2 within 3 organs in mice expressing human angiotensin converting enzyme 2 (ACE-2) ubiquitously (CAG-AC-70) or on epithelium (K18-promoter). Using a neon-green SARS-CoV-2, we observed both the epithelium and endothelium infected in AC70 mice but only the epithelium in K18 mice. There were increased neutrophils in the microcirculation but not in the alveoli of the lungs of AC70 mice. Platelets formed large aggregates in the pulmonary capillaries. Despite only neurons being infected within the brain, profound neutrophil adhesion forming the nidus of large platelet aggregates were observed in the cerebral microcirculation, with many nonperfused microvessels. Neutrophils breached the brain endothelial layer associated with a significant disruption of the blood-brain-barrier. Despite ubiquitous ACE-2 expression, CAG-AC-70 mice had very small increases in blood cytokine, no increase in thrombin, no infected circulating cells, and no liver involvement suggesting limited systemic effects. In summary, our imaging of SARS-CoV-2-infected mice gave direct evidence that there is a significant perturbation locally in the lung and brain microcirculation induced by local viral infection leading to increased local inflammation and thrombosis in these organs.
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Affiliation(s)
- Fernanda V. S. Castanheira
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Rita Nguyen
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Michelle Willson
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Marcela Davoli-Ferreira
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Bruna A. David
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Margaret M. Kelly
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
- Pathology and Laboratory Medicine, University of Calgary, Calgary, AB
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB
| | - Woo-Yong Lee
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Rachel M. Kratofil
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Wen X. Zhang
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
| | - Maxwell Bui-Marinos
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
- Charbonneau Cancer Research Institute, University of Calgary, Calgary, AB
| | - Jennifer A. Corcoran
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
- Charbonneau Cancer Research Institute, University of Calgary, Calgary, AB
| | - Paul Kubes
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB
- Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, AB
- Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB
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2
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Rousseau MC, Demarche M, Dresse MF, David BA. [Ovarian teratoma in children. Clinical case and review of the literature]. Rev Med Liege 2022; 77:39-44. [PMID: 35029339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Summmary : Teratomas are the most common histologic type of germ cell tumors in pediatrics. There are two types of teratomas, mature, benign and immature, malignant. Initial diagnosis is essential for optimal management. This work, based on a clinical case, aims to review the clinical, radiological, biological and histological characteristics allowing them to be differentiated.
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Affiliation(s)
| | - M Demarche
- Service de Chirurgie pédiatrique, CHR Citadelle, Liège, Belgique
| | - M F Dresse
- Service de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - B A David
- Service de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
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3
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Dresse MF, David BA, Demarche M, Florkin B, Forget P, Gatineau S, Longton J, Piette C, Seghaye MC. [The rise of targeted therapies in pediatric oncology]. Rev Med Liege 2021; 76:387-391. [PMID: 34080368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cancers are rare pathologies in children. Improvement in survival rates has been obtained thanks to new therapeutic strategies based on the identification of risk factors. Targeted therapies in paediatric oncology are new treatments providing hope that cure is achievable without long-term sequelae.
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Affiliation(s)
- M F Dresse
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - B A David
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - M Demarche
- Service de Chirurgie pédiatrique, CHR Citadelle,Liège, Belgique
| | - B Florkin
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - P Forget
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - S Gatineau
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - J Longton
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - C Piette
- Département de Pédiatrie, secteur d'Hémato-Oncologie pédiatrique, CHU Liège, Belgique
| | - M C Seghaye
- Département de Pédiatrie, CHU Liège, Belgique
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4
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Deppermann C, Kratofil RM, Peiseler M, David BA, Zindel J, Castanheira FVES, van der Wal F, Carestia A, Jenne CN, Marth JD, Kubes P. Macrophage galactose lectin is critical for Kupffer cells to clear aged platelets. J Exp Med 2020; 217:133651. [PMID: 31978220 PMCID: PMC7144524 DOI: 10.1084/jem.20190723] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 10/01/2019] [Accepted: 12/17/2019] [Indexed: 12/21/2022] Open
Abstract
Every day, megakaryocytes produce billions of platelets that circulate for several days and eventually are cleared by the liver. The exact removal mechanism, however, remains unclear. Loss of sialic acid residues is thought to feature in the aging and clearance of platelets. Using state-of-the-art spinning disk intravital microscopy to delineate the different compartments and cells of the mouse liver, we observed rapid accumulation of desialylated platelets predominantly on Kupffer cells, with only a few on endothelial cells and none on hepatocytes. Kupffer cell depletion prevented the removal of aged platelets from circulation. Ashwell-Morell receptor (AMR) deficiency alone had little effect on platelet uptake. Macrophage galactose lectin (MGL) together with AMR mediated clearance of desialylated or cold-stored platelets by Kupffer cells. Effective clearance is critical, as mice with an aged platelet population displayed a bleeding phenotype. Our data provide evidence that the MGL of Kupffer cells plays a significant role in the removal of desialylated platelets through a collaboration with the AMR, thereby maintaining a healthy and functional platelet compartment.
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Affiliation(s)
- Carsten Deppermann
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rachel M Kratofil
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Moritz Peiseler
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Bruna A David
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Joel Zindel
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Fernanda Vargas E Silva Castanheira
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Fardau van der Wal
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Agostina Carestia
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Craig N Jenne
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada.,Department of Microbiology, Immunology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada
| | - Jamey D Marth
- Center for Nanomedicine, SBP Medical Discovery Institute, and Department of Molecular, Cellular, and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA
| | - Paul Kubes
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta, Canada
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5
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David BA, Kubes P. Exploring the complex role of chemokines and chemoattractants in vivo on leukocyte dynamics. Immunol Rev 2020; 289:9-30. [PMID: 30977202 DOI: 10.1111/imr.12757] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/05/2019] [Accepted: 02/07/2019] [Indexed: 12/14/2022]
Abstract
Chemotaxis is fundamental for leukocyte migration in immunity and inflammation and contributes to the pathogenesis of many human diseases. Although chemokines and various other chemoattractants were initially appreciated as important mediators of acute inflammation, in the past years they have emerged as critical mediators of cell migration during immune surveillance, organ development, and cancer progression. Such advances in our knowledge in chemokine biology have paved the way for the development of specific pharmacological targets with great therapeutic potential. Chemoattractants may belong to different classes, including a complex chemokine system of approximately 50 endogenous molecules that bind to G protein-coupled receptors, which are expressed by a wide variety of cell types. Also, an unknown number of other chemoattractants may be generated by pathogens and damaged/dead cells. Therefore, blocking chemotaxis without causing side effects is an extremely challenging task. In this review, we focus on recent advances in understanding how the chemokine system orchestrates immune cell migration and positioning at the whole organ level in homeostasis, inflammation, and infection.
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Affiliation(s)
- Bruna A David
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Paul Kubes
- Department of Physiology and Pharmacology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.,Department of Microbiology and Infectious Diseases, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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6
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Freitas-Lopes MA, Mafra K, David BA, Carvalho-Gontijo R, Menezes GB. Differential Location and Distribution of Hepatic Immune Cells. Cells 2017; 6:cells6040048. [PMID: 29215603 PMCID: PMC5755505 DOI: 10.3390/cells6040048] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 12/03/2017] [Accepted: 12/04/2017] [Indexed: 12/12/2022] Open
Abstract
The liver is one of the main organs in the body, performing several metabolic and immunological functions that are indispensable to the organism. The liver is strategically positioned in the abdominal cavity between the intestine and the systemic circulation. Due to its location, the liver is continually exposed to nutritional insults, microbiota products from the intestinal tract, and to toxic substances. Hepatocytes are the major functional constituents of the hepatic lobes, and perform most of the liver’s secretory and synthesizing functions, although another important cell population sustains the vitality of the organ: the hepatic immune cells. Liver immune cells play a fundamental role in host immune responses and exquisite mechanisms are necessary to govern the density and the location of the different hepatic leukocytes. Here we discuss the location of these pivotal cells within the different liver compartments, and how their frequency and tissular location can dictate the fate of liver immune responses.
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Affiliation(s)
- Maria Alice Freitas-Lopes
- Center for Gastrointestinal Biology, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil.
| | - Kassiana Mafra
- Center for Gastrointestinal Biology, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil.
| | - Bruna A David
- Calvin, Phoebe and Joan Snyder Institute for Chronic Diseases, Department of Physiology and Pharmacology, University of Calgary. Calgary, AB T2N 1N4, Canada.
| | - Raquel Carvalho-Gontijo
- Center for Gastrointestinal Biology, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil.
| | - Gustavo B Menezes
- Center for Gastrointestinal Biology, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil.
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7
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Nakagaki BN, Freitas-Lopes MA, Carvalho É, Carvalho-Gontijo R, Castro-Oliveira HM, Rezende RM, Cara DC, Santos MM, Lopes RP, David BA, Menezes GB. Generation of a triple-fluorescent mouse strain allows a dynamic and spatial visualization of different liver phagocytes in vivo. AN ACAD BRAS CIENC 2017; 91:e20170317. [PMID: 29044327 DOI: 10.1590/0001-3765201720170317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 06/28/2017] [Indexed: 12/31/2022] Open
Abstract
Resident and circulating immune cells have been extensively studied due to their almost ubiquitous role in cell biology. Despite their classification under the "immune cell department", it is becoming increasingly clear that these cells are involved in many different non-immune related phenomena, including fetus development, vascular formation, memory, social behavior and many other phenotypes. There is a huge potential in combining high-throughput assays - including flow cytometry and gene analysis - with in vivo imaging. This can improve our knowledge in both basic and clinical cell biology, and accessing the expression of markers that are relevant in the context of both homeostasis and disease conditions might be instrumental. Here we describe how we generated a novel mouse strain that spontaneously express three different fluorescence markers under control of well-studied receptors (CX3CR1, CCR2 and CD11c) that are involved in a plethora of stages of cell ontogenesis, maturation, migration and behavior. Also, we assess the percentage of the expression and co-expression of each marker under homeostasis conditions, and how these cells behave when a local inflammation is induced in the liver applying a cutting-edge technology to image cells by confocal intravital microscopy.
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Affiliation(s)
- Brenda N Nakagaki
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Maria A Freitas-Lopes
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Érika Carvalho
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Raquel Carvalho-Gontijo
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Hortência M Castro-Oliveira
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Rafael M Rezende
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, 02115, Boston, MA, United States of America
| | - Denise C Cara
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
| | - Mônica M Santos
- Departamento de Biologia Animal, Universidade Federal de Viçosa, Av. Peter Henry Rolfs, s/n, Campus Universitário, 36570-900 Viçosa, MG, Brazil
| | - Rodrigo Pestana Lopes
- BD Biosciences, Rua Alexandre Dumas, 1976, Chácara Santo Antônio, 04717-040 São Paulo, SP, Brazil
| | - Bruna A David
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil.,Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo/USP, Av. Bandeirantes, 3900, Monte Alegre, 14049-900 Ribeirão Preto, SP, Brazil
| | - Gustavo B Menezes
- Center for Gastrointestinal Biology, Departamento de Morfologia, sala N3-140, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
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8
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Tavares LP, Garcia CC, Vago JP, Queiroz-Junior CM, Galvão I, David BA, Rachid MA, Silva PMR, Russo RC, Teixeira MM, Sousa LP. Inhibition of Phosphodiesterase-4 during Pneumococcal Pneumonia Reduces Inflammation and Lung Injury in Mice. Am J Respir Cell Mol Biol 2017; 55:24-34. [PMID: 26677751 DOI: 10.1165/rcmb.2015-0083oc] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Pneumococcal pneumonia is a leading cause of mortality worldwide. The inflammatory response to bacteria is necessary to control infection, but it may also contribute to tissue damage. Phosphodiesterase-4 inhibitors, such as rolipram (ROL), effectively reduce inflammation. Here, we examined the impact of ROL in a pneumococcal pneumonia murine model. Mice were infected intranasally with 10(5)-10(6) CFU of Streptococcus pneumoniae, treated with ROL in a prophylactic or therapeutic schedule in combination, or not, with the antibiotic ceftriaxone. Inflammation and bacteria counts were assessed, and ex vivo phagocytosis assays were performed. ROL treatment during S. pneumoniae infection decreased neutrophil recruitment into lungs and airways and reduced lung injury. Prophylactic ROL treatment also decreased cytokine levels in the airways. Although modulation of inflammation by ROL ameliorated pneumonia, bacteria burden was not reduced. On the other hand, antibiotic therapy reduced bacteria without reducing neutrophil infiltration, cytokine level, or lung injury. Combined ROL and ceftriaxone treatment decreased lethality rates and was more efficient in reducing inflammation, by increasing proresolving protein annexin A1 (AnxA1) expression, and bacterial burden by enhancing phagocytosis. Lack of AnxA1 increased inflammation and lethality induced by pneumococcal infection. These data show that immunomodulatory effects of phosphodiesterase-4 inhibitors are useful during severe pneumococcal pneumonia and suggest their potential benefit as adjunctive therapy during infectious diseases.
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Affiliation(s)
- Luciana P Tavares
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cristiana C Garcia
- 2 Laboratório de Vírus Respiratórios e do Sarampo, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil
| | - Juliana P Vago
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,3 Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Celso M Queiroz-Junior
- 4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Izabela Galvão
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Bruna A David
- 4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Milene A Rachid
- 5 Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Patrícia M R Silva
- 6 Laboratório de Inflamação, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil and
| | - Remo C Russo
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,7 Laboratório de Imunologia e Mecânica Pulmonar, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Mauro M Teixeira
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Lirlândia P Sousa
- 1 Laboratório de Imunofarmacologia, Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,3 Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil.,4 Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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9
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David BA, Rubino S, Moreira TG, Freitas-Lopes MA, Araújo AM, Paul NE, Rezende RM, Menezes GB. Isolation and high-dimensional phenotyping of gastrointestinal immune cells. Immunology 2017; 151:56-70. [PMID: 28039862 DOI: 10.1111/imm.12706] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 12/21/2016] [Accepted: 12/24/2016] [Indexed: 12/25/2022] Open
Abstract
The gastrointestinal immune system plays a pivotal role in the host relationship with food antigens, the homeostatic microbiome and enteric pathogens. Here, we describe how to collect and process liver and intestinal samples to efficiently isolate and analyse resident immune cells. Furthermore, we describe a step-by-step methodology showing how to high-dimensionally immunophenotype resident leucocytes using cytometry by time-of-flight, providing a well-characterized antibody platform that allows the identification of every leucocyte subset simultaneously. This protocol also includes instructions to purify and cultivate primary murine hepatocytes, a powerful tool to assess basic cell biology and toxicology assays. Gut and liver samples from the same mouse can be collected, processed and stained in less than 6 hr. This protocol enables the recovery of several populations of purified and viable immune cells from solid and fibrous organs, preventing unwanted loss of adherent cells during isolation.
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Affiliation(s)
- Bruna A David
- Departamento de Morfologia, Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Stephen Rubino
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Thais G Moreira
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Maria Alice Freitas-Lopes
- Departamento de Morfologia, Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Alan M Araújo
- Departamento de Morfologia, Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Nicole E Paul
- Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Rafael M Rezende
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Gustavo B Menezes
- Departamento de Morfologia, Center for Gastrointestinal Biology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Secundino NFC, de Freitas VC, Monteiro CC, Pires ACAM, David BA, Pimenta PFP. The transmission of Leishmania infantum chagasi by the bite of the Lutzomyia longipalpis to two different vertebrates. Parasit Vectors 2012; 5:20. [PMID: 22260275 PMCID: PMC3293046 DOI: 10.1186/1756-3305-5-20] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 01/19/2012] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Sandflies are vectors of Leishmania, the causative agent of leishmaniasis in mammalian hosts, including humans. The protozoan parasite is transmitted by the sandfly bite during salivation that occurs at the moment of blood feeding. The components of vector saliva include anticlotting and vasodilatory factors that facilitate blood flow and immunomodulatory factors that inhibit wound healing and quell the immune response. Not surprisingly, these factors also play important roles in the establishment of Leishmania infection. To date, the majority of knowledge that has been generated regarding the process of Leishmania infection, including L. infantum chagasi transmission has been gathered by using intradermal or subcutaneous inoculation of purified parasites. FINDINGS This study presents the establishment of a transmission model of Leishmania infantum chagasi by the bite of Lutzomyia longipalpis, the vector of American visceral leishmaniasis. The parasites were successfully transmitted by infected sandfly bites to mice and hamsters, indicating that both animals are good experimental models. The L. infantum chagasi dose that was transmitted in each single bite ranged from 10 to 10, 000 parasites, but 75% of the sandflies transmitted less than 300 parasites. CONCLUSIONS The strategy for initiating infection by sandfly bite of experimental animals facilitates future investigations into the complex and dynamic mechanisms of visceral leishmaniasis. It is important to elucidate the transmission mechanism of vector bites. This model represents a useful tool to study L. infantum chagasi infection transmitted by the vector.
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Affiliation(s)
- Nagila F C Secundino
- Laboratory of Medical Entomology of the Centro de Pesquisas René Rachou, Fundação Oswaldo Cruz-MG, Av, Augusto Lima, 1715 Barro Preto, Belo Horizonte, 30190-002, Minas Gerais, Brazil.
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Abstract
Nursing's survival in the new millennium necessitates the application of a fresh lens to the manner in which nurses participate in and perpetuate the insidious nature of their oppression. This article critically explores the language and activities that annotate nursing's gender politics to expose how language and power intersect, facilitating the development of a language of social change. Self-deception is found to be a central organizing concept of professional and service delivery organizations that perpetuates professional mediocrity, limits freedom of thought and action, and preserves the borderline status of nurses. Dialogue inclusive of the internal and external systems operating to oppress nurses is suggested to transform nurses as collective social agents and reframe their sociopolitical reality.
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Affiliation(s)
- B A David
- College of Nursing, Florida Atlantic University, Boca Raton, USA
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