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Bannerman D, Pascual-Gil S, Wu Q, Fernandes I, Zhao Y, Wagner KT, Okhovatian S, Landau S, Rafatian N, Bodenstein DF, Wang Y, Nash TR, Vunjak-Novakovic G, Keller G, Epelman S, Radisic M. Heart-on-a-Chip Model of Epicardial-Myocardial Interaction in Ischemia Reperfusion Injury. Adv Healthc Mater 2024:e2302642. [PMID: 38683053 DOI: 10.1002/adhm.202302642] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 03/22/2024] [Indexed: 05/01/2024]
Abstract
Epicardial cells (EPIs) form the outer layer of the heart and play an important role in development and disease. Current heart-on-a-chip platforms still do not fully mimic the native cardiac environment due to the absence of relevant cell types, such as EPIs. Here, using the Biowire II platform, engineered cardiac tissues with an epicardial outer layer and inner myocardial structure are constructed, and an image analysis approach is developed to track the EPI cell migration in a beating myocardial environment. Functional properties of EPI cardiac tissues improve over two weeks in culture. In conditions mimicking ischemia reperfusion injury (IRI), the EPI cardiac tissues experience less cell death and a lower impact on functional properties. EPI cell coverage is significantly reduced and more diffuse under normoxic conditions compared to the post-IRI conditions. Upon IRI, migration of EPI cells into the cardiac tissue interior is observed, with contributions to alpha smooth muscle actin positive cell population. Altogether, a novel heart-on-a-chip model is designed to incorporate EPIs through a formation process that mimics cardiac development, and this work demonstrates that EPI cardiac tissues respond to injury differently than epicardium-free controls, highlighting the importance of including EPIs in heart-on-a-chip constructs that aim to accurately mimic the cardiac environment.
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Affiliation(s)
- Dawn Bannerman
- Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, M5S 3E5, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Simon Pascual-Gil
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Qinghua Wu
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Ian Fernandes
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G 1L7, Canada
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, M5G 1L7, Canada
| | - Yimu Zhao
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Karl T Wagner
- Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, M5S 3E5, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Sargol Okhovatian
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Shira Landau
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Naimeh Rafatian
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - David F Bodenstein
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, M5G 2C8, Canada
| | - Ying Wang
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
| | - Trevor R Nash
- Vagelos College of Physicians and Surgeons, Columbia University, New York, NY, 10032, USA
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Gordana Vunjak-Novakovic
- Department of Medicine, Columbia University, New York, NY, 10032, USA
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Gordon Keller
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G 1L7, Canada
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, M5G 1L7, Canada
| | - Slava Epelman
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
- Division of Cardiology, University Health Network, Peter Munk Cardiac Centre, Toronto, ON, M5G 2N2, Canada
- Ted Rogers Centre for Heart Research, Toronto, Ontario, M5G 1M1, Canada
| | - Milica Radisic
- Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, M5S 3E5, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, ON, M5S 3E2, Canada
- Toronto General Health Research Institute, University Health Network, Toronto, ON, M5G 2C4, Canada
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2
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Strohm EM, Callaghan NI, Ding Y, Latifi N, Rafatian N, Funakoshi S, Fernandes I, Reitz CJ, Di Paola M, Gramolini AO, Radisic M, Keller G, Kolios MC, Simmons CA. Noninvasive Quantification of Contractile Dynamics in Cardiac Cells, Spheroids, and Organs-on-a-Chip Using High-Frequency Ultrasound. ACS Nano 2024; 18:314-327. [PMID: 38147684 DOI: 10.1021/acsnano.3c06325] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Cell-based models that mimic in vivo heart physiology are poised to make significant advances in cardiac disease modeling and drug discovery. In these systems, cardiomyocyte (CM) contractility is an important functional metric, but current measurement methods are inaccurate and low-throughput or require complex setups. To address this need, we developed a standalone noninvasive, label-free ultrasound technique operating at 40-200 MHz to measure the contractile kinetics of cardiac models, ranging from single adult CMs to 3D microtissue constructs in standard cell culture formats. The high temporal resolution of 1000 fps resolved the beat profile of single mouse CMs paced at up to 9 Hz, revealing limitations of lower speed optical based measurements to resolve beat kinetics or characterize aberrant beats. Coupling of ultrasound with traction force microscopy enabled the measurement of the CM longitudinal modulus and facile estimation of adult mouse CM contractile forces of 2.34 ± 1.40 μN, comparable to more complex measurement techniques. Similarly, the beat rate, rhythm, and drug responses of CM spheroid and microtissue models were measured, including in configurations without optical access. In conclusion, ultrasound can be used for the rapid characterization of CM contractile function in a wide range of commonly studied configurations ranging from single cells to 3D tissue constructs using standard well plates and custom microdevices, with applications in cardiac drug discovery and cardiotoxicity evaluation.
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Affiliation(s)
- Eric M Strohm
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, M5S 3G8, Canada
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
| | - Neal I Callaghan
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, M5S 3G9, Canada
| | - Yu Ding
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, M5S 3G9, Canada
| | - Neda Latifi
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, M5S 3G8, Canada
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
| | - Naimeh Rafatian
- Toronto General Hospital Research Institute, Toronto, M5G 2C4, Canada
| | - Shunsuke Funakoshi
- McEwen Stem Cell Institute, University Health Network, Toronto, M5G 1L7, Canada
| | - Ian Fernandes
- McEwen Stem Cell Institute, University Health Network, Toronto, M5G 1L7, Canada
| | - Cristine J Reitz
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Department of Physiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - Michelle Di Paola
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Department of Physiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - Anthony O Gramolini
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Department of Physiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - Milica Radisic
- Institute of Biomedical Engineering, University of Toronto, Toronto, M5S 3G9, Canada
- Toronto General Hospital Research Institute, Toronto, M5G 2C4, Canada
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, M5S 3E5, Canada
| | - Gordon Keller
- McEwen Stem Cell Institute, University Health Network, Toronto, M5G 1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, M5G 1L7, Canada
| | - Michael C Kolios
- Department of Physics, Toronto Metropolitan University, Toronto, M5B 2K3, Canada
| | - Craig A Simmons
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, M5S 3G8, Canada
- Translational Biology and Engineering Program, Ted Rogers Center for Heart Research, Toronto, M5G 1M1, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, M5S 3G9, Canada
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3
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Fernandes I, Funakoshi S, Hamidzada H, Epelman S, Keller G. Modeling cardiac fibroblast heterogeneity from human pluripotent stem cell-derived epicardial cells. Nat Commun 2023; 14:8183. [PMID: 38081833 PMCID: PMC10713677 DOI: 10.1038/s41467-023-43312-0] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 11/06/2023] [Indexed: 12/18/2023] Open
Abstract
Cardiac fibroblasts play an essential role in the development of the heart and are implicated in disease progression in the context of fibrosis and regeneration. Here, we establish a simple organoid culture platform using human pluripotent stem cell-derived epicardial cells and ventricular cardiomyocytes to study the development, maturation, and heterogeneity of cardiac fibroblasts under normal conditions and following treatment with pathological stimuli. We demonstrate that this system models the early interactions between epicardial cells and cardiomyocytes to generate a population of fibroblasts that recapitulates many aspects of fibroblast behavior in vivo, including changes associated with maturation and in response to pathological stimuli associated with cardiac injury. Using single cell transcriptomics, we show that the hPSC-derived organoid fibroblast population displays a high degree of heterogeneity that approximates the heterogeneity of populations in both the normal and diseased human heart. Additionally, we identify a unique subpopulation of fibroblasts possessing reparative features previously characterized in the hearts of model organisms. Taken together, our system recapitulates many aspects of human cardiac fibroblast specification, development, and maturation, providing a platform to investigate the role of these cells in human cardiovascular development and disease.
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Affiliation(s)
- Ian Fernandes
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, M5G1L7, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada
- Princess Margaret Cancer Center, University Health Network, Toronto, ON, M5G1L7, Canada
| | - Shunsuke Funakoshi
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, M5G1L7, Canada.
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, 606-8507, Japan.
| | - Homaira Hamidzada
- Toronto General Hospital Research Institute, University Health Network Toronto, Toronto, ON, M5G1L7, Canada
- Ted Rogers Centre for Heart Research, Translational Biology and Engineering Program, Toronto, ON, M5G1L7, Canada
- Department of Immunology, University of Toronto, Toronto, ON, M5G1L7, Canada
| | - Slava Epelman
- Toronto General Hospital Research Institute, University Health Network Toronto, Toronto, ON, M5G1L7, Canada
- Ted Rogers Centre for Heart Research, Translational Biology and Engineering Program, Toronto, ON, M5G1L7, Canada
- Department of Immunology, University of Toronto, Toronto, ON, M5G1L7, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, M5G1L7, Canada
- Peter Munk Cardiac Centre, University Health Networ, Toronto, ON, M5G1L7, Canada
| | - Gordon Keller
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, M5G1L7, Canada.
- Department of Medical Biophysics, University of Toronto, Toronto, ON, M5G1L7, Canada.
- Princess Margaret Cancer Center, University Health Network, Toronto, ON, M5G1L7, Canada.
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4
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Soares De Pinho I, Simão D, Roldán Galanares M, Lopes-Brás R, Patel V, Esperança-Martins M, Gonçalves L, Alves L, Fernandes I, Gamez Casado S, Artacho Criado S, Baena Cañada J, Costa J, Fernandes A, Teixeira de Sousa R, Costa L, Luz P. Anthracycline versus no anthracycline neoadjuvant therapy for HER2 breast cancer: real world evidence. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01516-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Santos Ferreira DA, Fernandes I, Diaz S, Saraiva F, Guerreiro C, Brandao M, Silva G, Silva M, Sampaio F, Pires-Morais G, Melica B, Santos L, Rodrigues A, Braga P, Fontes-Carvalho R. Flow-status and survival in severe aortic stenosis treated with TAVI – is flow rate superior to stroke volume index? Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Low-flow status, currently defined as a stroke volume index (SVi) <35 mL/m2, is an important prognostic predictor for mortality after Transcatheter Aortic Valve Implantation (TAVI) for severe aortic stenosis (SAS). However, transaortic flow rate (FR) – defined as stroke volume divided by left ventricle ejection time - has recently been suggested to be superior to SVi in defining low-flow states, as it reflects more closely valvular resistance, while being independent of body surface area. Low FR is most consistently defined as FR<200 mL/s.
Purpose
Determine the prognostic impact of FR and SVi before TAVI in survival after intervention for SAS.
Methods
A single-centre retrospective database of all TAVI performed between 2011 and 2019 was analyzed, and cases with pre-intervention echocardiograms available were included. Low-flow patients were identified according to basal FR (<200 mL/s) or SVi (<35 mL/m2), and compared with normal-flow cases. The primary endpoint was defined as time to all-cause death or last follow-up. The impact of flow-status (using FR or SVi) in survival was assessed using Kaplan-Meier curves and log-rank test, as well as Cox proportional hazard model adjusted for EuroSCORE II, using FR or SVi either as categorical or continuous variables. A subanalysis further compared patients with preserved and reduced ejection fraction (EF, <52%). p<0.05 was considered statistically significant.
Results
From 657 TAVI performed, 490 (74.6%) cases were included, with a median follow-up of 43 months. From those, 59.6% were defined as low-flow according to FR, and 43.3% using SVi. Low-flow patients, using each parameter, were of higher surgical risk (EuroSCORE II and STS scores), had more advanced NYHA classes, worse estimated creatinine clearance, and suffered more frequently from coronary artery disease. Low-FR patients were also older, and more predominantly female. Atrial fibrillation was more prevalent among low SVi cases. Functional aortic valve area was lower in low-flow patients using both assessments, but low-SVi was also associated with lower transaortic gradients, as well as lower EF before and after TAVI. Regarding all-cause mortality, low-SVi was associated with worse survival [p=0.02, hazard ratio (HR) 1.43 (1.05–1.94)], but not low-FR (p=0.4). However, low-SVi, when adjusted for EuroScore II, was no longer a predictor of all-cause mortality (p=0.08). When considering FR and SVi as continuous variables, a higher SVi (but not FR) was associated with better survival (HR 0.98, p=0.047) in multivariable analysis adjusted for EuroSCORE II. When stratifying according to preserved and reduced EF, both FR and SVi did not predict all-cause mortality.
Conclusions
Low-flow states are common in SAS population treated with TAVI, being frequently associated with worse symptoms and higher procedural risk. Low-SVi, but not low-FR, negatively impacts survival after intervention, representing a marker for prognosis after TAVI.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- D A Santos Ferreira
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - I Fernandes
- Faculty of Medicine University of Porto , Porto , Portugal
| | - S Diaz
- University of Porto, UnIC@RISE, Department of Surgery and Physiology , Porto , Portugal
| | - F Saraiva
- University of Porto, UnIC@RISE, Department of Surgery and Physiology , Porto , Portugal
| | - C Guerreiro
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - M Brandao
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - G Silva
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - M Silva
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - F Sampaio
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - G Pires-Morais
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - B Melica
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - L Santos
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - A Rodrigues
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - P Braga
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
| | - R Fontes-Carvalho
- Hospital Center of Vila Nova de Gaia/Espinho, Department of Cardiology , Vila Nova de Gaia , Portugal
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6
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Yang D, Gomez-Garcia J, Funakoshi S, Tran T, Fernandes I, Bader GD, Laflamme MA, Keller GM. Modeling human multi-lineage heart field development with pluripotent stem cells. Cell Stem Cell 2022; 29:1382-1401.e8. [PMID: 36055193 DOI: 10.1016/j.stem.2022.08.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [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: 08/08/2021] [Revised: 07/01/2022] [Accepted: 08/11/2022] [Indexed: 12/27/2022]
Abstract
The cardiomyocyte (CM) subtypes in the mammalian heart derive from distinct lineages known as the first heart field (FHF), the anterior second heart field (aSHF), and the posterior second heart field (pSHF) lineages that are specified during gastrulation. We modeled human heart field development from human pluripotent stem cells (hPSCs) by using single-cell RNA-sequencing to delineate lineage specification and progression. Analyses of hPSC-derived and mouse mesoderm transcriptomes enabled the identification of distinct human FHF, aSHF, and pSHF mesoderm subpopulations. Through staged manipulation of signaling pathways identified from transcriptomics, we generated myocyte populations that display molecular characteristics of key CM subtypes. The developmental trajectory of the human cardiac lineages recapitulated that of the mouse, demonstrating conserved cardiovascular programs. These findings establish a comprehensive landscape of human embryonic cardiogenesis that provides access to a broad spectrum of cardiomyocytes for modeling congenital heart diseases and chamber-specific cardiomyopathies as well as for developing new therapies to treat them.
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Affiliation(s)
- Donghe Yang
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada.
| | - Juliana Gomez-Garcia
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Biomedical Engineering, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Shunsuke Funakoshi
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Thinh Tran
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Ian Fernandes
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Gary D Bader
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada; The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Michael A Laflamme
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Laboratory Medicine & Pathobiology, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Gordon M Keller
- McEwen Stem Cell Institute, University Health Network, Toronto, ON M5G 1L7, Canada; Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada.
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7
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Trabulo C, Gramaça J, Fernandes I, Gameiro-dos-Santos R, Pina I, Ravasco P. Body composition and the cancer patient. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Gramaça J, Palma Dos Reis A, Gameiro Dos Santos R, Fernandes I, Trabulo C, Baptista A, Da Luz R, Pina I. Development and evaluation of a real-world data-based prognostic score in castration-resistant metastatic prostate cancer. EUR UROL SUPPL 2021. [DOI: 10.1016/s2666-1683(21)03151-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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9
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Fernandes I, Gramaça J, Gameiro-dos-Santos R, Trabulo C, Pina I. P-275 Evaluation of radical chemoradiation outcomes in stage II/III anal cancer: Real-world data population. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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10
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Gramaça J, Fernandes I, Gameiro-dos-Santos R, Pina I. P-283 Prognostic factors in the evaluation of stage II/III squamous cell carcinoma of the anus treated with chemoradiation. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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11
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Funakoshi S, Fernandes I, Mastikhina O, Wilkinson D, Tran T, Dhahri W, Mazine A, Yang D, Burnett B, Lee J, Protze S, Bader GD, Nunes SS, Laflamme M, Keller G. Generation of mature compact ventricular cardiomyocytes from human pluripotent stem cells. Nat Commun 2021; 12:3155. [PMID: 34039977 PMCID: PMC8155185 DOI: 10.1038/s41467-021-23329-z] [Citation(s) in RCA: 77] [Impact Index Per Article: 25.7] [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: 06/16/2020] [Accepted: 04/18/2021] [Indexed: 02/08/2023] Open
Abstract
Compact cardiomyocytes that make up the ventricular wall of the adult heart represent an important therapeutic target population for modeling and treating cardiovascular diseases. Here, we established a differentiation strategy that promotes the specification, proliferation and maturation of compact ventricular cardiomyocytes from human pluripotent stem cells (hPSCs). The cardiomyocytes generated under these conditions display the ability to use fatty acids as an energy source, a high mitochondrial mass, well-defined sarcomere structures and enhanced contraction force. These ventricular cells undergo metabolic changes indicative of those associated with heart failure when challenged in vitro with pathological stimuli and were found to generate grafts consisting of more mature cells than those derived from immature cardiomyocytes following transplantation into infarcted rat hearts. hPSC-derived atrial cardiomyocytes also responded to the maturation cues identified in this study, indicating that the approach is broadly applicable to different subtypes of the heart. Collectively, these findings highlight the power of recapitulating key aspects of embryonic and postnatal development for generating therapeutically relevant cell types from hPSCs. Cardiomyocytes of heart ventricles consist of subpopulations of trabecular and compact subtypes. Here the authors describe the generation of structurally, metabolically and functionally mature compact ventricular cardiomyocytes as well as mature atrial cardiomyocytes from human pluripotent stem cells.
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Affiliation(s)
- Shunsuke Funakoshi
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada
| | - Ian Fernandes
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Olya Mastikhina
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | | | - Thinh Tran
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Wahiba Dhahri
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada
| | - Amine Mazine
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - Donghe Yang
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada.,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | | | | | - Stephanie Protze
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Gary D Bader
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada.,Department of Computer Science, University of Toronto, Toronto, ON, Canada.,The Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Sara S Nunes
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada.,Laboratory of Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.,Heart & Stroke/Richard Lewar Centre of Excellence, University of Toronto, Toronto, ON, Canada
| | - Michael Laflamme
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada.,Laboratory of Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.,Peter Munk Cardiac Centre, University Health Network, Toronto, ON, Canada
| | - Gordon Keller
- McEwen Stem Cell Institute, University Health Network, Toronto, ON, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
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12
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Nogueira-Costa G, Gramaça J, Fernandes I, Trabulo C, Gonçalves J, Pina I. Survival comparison of HER2 breast cancer patients according to HR status: analysis of a single Portuguese centre. Breast 2021. [DOI: 10.1016/s0960-9776(21)00201-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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13
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Nogueira-Costa G, Fernandes I, Gameiro R, Gramaça J, Xavier AT, Pina I. Prognostic utility of neutrophil-to-lymphocyte ratio in patients with metastatic colorectal cancer treated using different modalities. Curr Oncol 2020; 27:237-243. [PMID: 33173374 PMCID: PMC7606052 DOI: 10.3747/co.27.6573] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Introduction Inflammation is a critical component in carcinogenesis. The neutrophil-to-lymphocyte ratio (nlr) has been retrospectively studied as a biomarker of prognosis in metastatic colorectal cancer (mcrc). Compared with a low nlr, a high nlr is associated with worse prognosis. In the present study, we compared real-world survival for patients with mcrc based on their nlr group, and we assessed the utility of the nlr in determining first-line chemotherapy and metastasectomy benefit. Methods In this retrospective and descriptive analysis of patients with mcrc undergoing first-line chemotherapy in a single centre, the last systemic absolute neutrophil and lymphocyte count before treatment was used for the nlr. A receiver operating characteristic curve was used to estimate the nlr cut-off value, dividing the patients into low and high nlr groups. Median overall survival (mos) was compared using Kaplan-Meier curves and the log-rank test. A multivariate analysis was performed using a Cox regression model. Results The 102 analyzed patients had a median follow-up of 15 months. Regardless of systemic therapy, approximately 20% of patients underwent metastasectomy. The nlr cut-off was established at 2.35, placing 45 patients in the low-risk group (nlr < 2.35) and 57 in the high-risk group (nlr ≥ 2.35). The Kaplan-Meier analysis showed a mos of 39.1 months in the low-risk group and 14.4 months in the high-risk group (p < 0.001). Multivariate Cox regression on the nlr estimated a hazard ratio of 3.08 (p = 0.01). Survival analysis in each risk subgroup, considering the history of metastasectomy, was also performed. In the low-risk group, mos was longer for patients undergoing metastasectomy than for those not undergoing the procedure (95.2 months vs. 22.6 months, p = 0.05). In the high-risk group, mos was not statistically different for patients undergoing or not undergoing metastasectomy (24.3 months vs. 12.7 months, p = 0.08). Conclusions Our real-world data analysis of nlr in patients with mcrc confirmed that this biomarker is useful in predicting survival. It also suggests that nlr is an effective tool to choose first-line treatment and to predict the benefit of metastasectomy.
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Affiliation(s)
| | - I Fernandes
- Centro Hospitalar Barreiro-Montijo, Barreiro, Portugal
| | - R Gameiro
- Centro Hospitalar Barreiro-Montijo, Barreiro, Portugal
| | - J Gramaça
- Centro Hospitalar Barreiro-Montijo, Barreiro, Portugal
| | - A T Xavier
- Centro Hospitalar Barreiro-Montijo, Barreiro, Portugal
| | - I Pina
- Centro Hospitalar Barreiro-Montijo, Barreiro, Portugal
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14
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Lobo-Martins S, Martins M, Semedo P, Alvim C, Pais HL, Paiva R, Pinto C, Ribeiro L, Fernandes I, Macedo D, Mansinho A, Vendrell I, Sousa RTD, Costa L. P-151 The impact of adjuvant chemotherapy regimens in stage II colon cancer (CC) patients. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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15
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Thavandiran N, Hale C, Blit P, Sandberg ML, McElvain ME, Gagliardi M, Sun B, Witty A, Graham G, Do VTH, Bakooshli MA, Le H, Ostblom J, McEwen S, Chau E, Prowse A, Fernandes I, Norman A, Gilbert PM, Keller G, Tagari P, Xu H, Radisic M, Zandstra PW. Functional arrays of human pluripotent stem cell-derived cardiac microtissues. Sci Rep 2020; 10:6919. [PMID: 32332814 PMCID: PMC7181791 DOI: 10.1038/s41598-020-62955-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 08/01/2019] [Accepted: 03/18/2020] [Indexed: 11/09/2022] Open
Abstract
To accelerate the cardiac drug discovery pipeline, we set out to develop a platform that would be capable of quantifying tissue-level functions such as contractile force and be amenable to standard multiwell-plate manipulations. We report a 96-well-based array of 3D human pluripotent stem cell (hPSC)-derived cardiac microtissues - termed Cardiac MicroRings (CaMiRi) - in custom 3D-print-molded multiwell plates capable of contractile force measurement. Within each well, two elastomeric microcantilevers are situated above a circumferential ramp. The wells are seeded with cell-laden collagen, which, in response to the gradual slope of the circumferential ramp, self-organizes around tip-gated microcantilevers to form contracting CaMiRi. The contractile force exerted by the CaMiRi is measured and calculated using the deflection of the cantilevers. Platform responses were robust and comparable across wells, and we used it to determine an optimal tissue formulation. We validated the contractile force response of CaMiRi using selected cardiotropic compounds with known effects. Additionally, we developed automated protocols for CaMiRi seeding, image acquisition, and analysis to enable the measurement of contractile force with increased throughput. The unique tissue fabrication properties of the platform, and the consequent effects on tissue function, were demonstrated upon adding hPSC-derived epicardial cells to the system. This platform represents an open-source contractile force screening system useful for drug screening and tissue engineering applications.
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Affiliation(s)
- Nimalan Thavandiran
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada.,Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada
| | - Christopher Hale
- Amgen Discovery Research, Amgen Inc., South San Francisco, CA, USA
| | | | | | | | - Mark Gagliardi
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | - Bo Sun
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | - Alec Witty
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | | | | | - Mohsen Afshar Bakooshli
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Hon Le
- Amgen Discovery Research, Amgen Inc., South San Francisco, CA, USA
| | - Joel Ostblom
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Samuel McEwen
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Erik Chau
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
| | | | - Ian Fernandes
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | | | - Penney M Gilbert
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada.,Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.,Cell and Systems Biology, University of Toronto, Toronto, Ontario, Canada.,Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Gordon Keller
- McEwen Centre for Regenerative Medicine, University Health Network, Toronto, Ontario, Canada
| | - Philip Tagari
- Amgen Discovery Research, Amgen Inc., South San Francisco, CA, USA
| | - Han Xu
- A2 Biotherapeutics Inc., Agoura Hills, CA, USA.
| | - Milica Radisic
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada. .,Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario, Canada. .,Heart and Stroke/Richard Lewar Centre of Excellence, University of Toronto, Toronto, Ontario, Canada.
| | - Peter W Zandstra
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada. .,CCRM, Toronto, Ontario, Canada. .,Terrence Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada. .,Michael Smith Laboratories, School of Biomedical Engineering, University of British Columbia, Vancouver, British Columbia, Canada.
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Santos AP, Vinagre J, Soares P, Claro I, Sanches AC, Gomes L, Fernandes I, Catarino AL, Preto J, Pereira BD, Marques AP, Rodrigues F, Amaral C, Rocha G, Mellidez JC, Simões H, Lopes JM, Bugalho MJ. Erratum to "Gastroenteropancreatic Neuroendocrine Neoplasia Characterization in Portugal: Results from the NETs Study Group of the Portuguese Society of Endocrinology, Diabetes and Metabolism". Int J Endocrinol 2020; 2020:9184324. [PMID: 32655634 PMCID: PMC7320291 DOI: 10.1155/2020/9184324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 04/21/2020] [Indexed: 12/05/2022] Open
Abstract
[This corrects the article DOI: 10.1155/2019/4518742.].
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Affiliation(s)
- A. P. Santos
- Instituto Português de Oncologia do Porto, Francisco Gentil (IPOPFG), 4200-072 Porto, Portugal
| | - J. Vinagre
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
| | - P. Soares
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - I. Claro
- Instituto Português de Oncologia de Lisboa, Francisco Gentil (IPOLFG), 1099-023 Lisboa, Portugal
| | - A. C. Sanches
- Instituto Português de Oncologia do Porto, Francisco Gentil (IPOPFG), 4200-072 Porto, Portugal
| | - L. Gomes
- Centro Hospitalar e Universitário de Coimbra (CHUC), 3000-075 Coimbra, Portugal
| | - I. Fernandes
- Centro Hospitalar Lisboa Norte, EPE (CHLN), 1649-035 Lisboa, Portugal
- Centro Académico de Medicina de Lisboa (CAML), 1649-035 Lisboa, Portugal
| | | | - J. Preto
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - B. D. Pereira
- Hospital Garcia de Orta, EPE, 2801-951 Almada, Portugal
| | - A. P. Marques
- Unidade Local de Saúde de Matosinhos, 4464-513 Senhora da Hora, Portugal
| | - F. Rodrigues
- Instituto Português de Oncologia de Coimbra, Francisco Gentil (IPOCFG), 3000-075 Coimbra, Portugal
| | - C. Amaral
- Centro Hospitalar do Porto-Hospital Santo António, 4099-001 Porto, Portugal
| | - G. Rocha
- Centro Hospitalar Gaia/Espinho (CHGE), 4434-502 Vila Nova de Gaia, Portugal
| | - J. C. Mellidez
- Centro Hospitalar do Baixo Vouga (CHBV), 3810-501 Aveiro, Portugal
| | - H. Simões
- Centro Hospitalar de Lisboa Ocidental (CHLO), 1349-019 Lisboa, Portugal
| | - J. M. Lopes
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - M. J. Bugalho
- Centro Hospitalar Lisboa Norte, EPE (CHLN), 1649-035 Lisboa, Portugal
- Centro Académico de Medicina de Lisboa (CAML), 1649-035 Lisboa, Portugal
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Reis J, Fragoso J, Amorim R, Fernandes I, Selores M. Image Gallery: An atypical form of bacillary angiomatosis as the presenting illness of AIDS. Br J Dermatol 2019; 181:e143. [PMID: 31353445 DOI: 10.1111/bjd.18297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J Reis
- Serviço de Dermatologia, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - J Fragoso
- Serviço de Doenças Infeciosas, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - R Amorim
- Serviço de Anatomia Patológica, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - I Fernandes
- Serviço de Dermatologia, Centro Hospitalar Universitário do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica, Instituto de Ciência Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - M Selores
- Serviço de Dermatologia, Centro Hospitalar Universitário do Porto, Porto, Portugal.,Instituto de Ciência Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal.,Unidade de Investigação de Dermatologia, Centro Hospitalar Universitário do Porto, Porto, Portugal
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18
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Nogueira-Costa G, Fernandes I, Guerra-Pereira N, Gameiro R, Gramaça J, Xavier A, Pina I. Neutrophil/lymphocyte ratio in metastatic colorectal cancer: real-world data for evidence of its prognostic role. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz155.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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19
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Fernandes I, Gil L. Quality of life of the person with "Inflammatory Bowel Disease". Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz035.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - L Gil
- Hospital Sousa Martins Unidade Local de Saúde da Guarda, Portugal
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20
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Santos AP, Vinagre J, Soares P, Claro I, Sanches AC, Gomes L, Fernandes I, Catarino AL, Preto J, Pereira BD, Marques AP, Rodrigues F, Amaral C, Rocha G, Mellidez JC, Simões H, Lopes JM, Bugalho MJ. Gastroenteropancreatic Neuroendocrine Neoplasia Characterization in Portugal: Results from the NETs Study Group of the Portuguese Society of Endocrinology, Diabetes and Metabolism. Int J Endocrinol 2019; 2019:4518742. [PMID: 31467527 PMCID: PMC6701412 DOI: 10.1155/2019/4518742] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 01/21/2019] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND The incidence of gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) has been increasing in the last five decades, but there is no large-scale data regarding these tumours in Portugal. We conducted a cross-sectional, multicentric study in main Portuguese centers to evaluate the clinical, pathological, and therapeutic profile of GEP-NENs. METHODS From November, 2012, to July, 2014, data from 293 patients diagnosed with GEP-NENs from 15 centers in Portugal was collected and registered in an online electronic platform. RESULTS Median age at diagnosis was 56.5 (range: 15-87) years with a preponderance of females (54.6%). The most frequent primary sites were the pancreas (31.1%), jejunum-ileum (24.2%), stomach (13.7%), and rectum (8.5%). Data regarding hormonal status was not available in most patients (82.3%). Stratified by the tumour grade (WHO 2010 classification), we observed 64.0% of NET G1, 24.7% of NET G2, and 11.3% of NEC. Poorly differentiated tumours occurred mainly in older patients (p = 0.017), were larger (p < 0.001), and presented more vascular (p = 0.004) and lymphatic (p = 0.001) invasion. At the time of diagnosis, 44.4% of GEP-NENs presented metastatic disease. Surgery (79.6%) and somatostatin analogues (30.7%) were the most frequently used therapies of GEP-NENs with reported grading. CONCLUSION In general, Portuguese patients with GEP-NENs presented similar characteristics to other populations described in the literature. This cross-sectional study represents the first step to establish a national database of GEP-NENs that may aid in understanding the clinical and epidemiological features of these tumours in Portugal.
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Affiliation(s)
- A. P. Santos
- Instituto Português de Oncologia do Porto, Francisco Gentil (IPOPFG), 4200-162 Porto, Portugal
| | - J. Vinagre
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
| | - P. Soares
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - I. Claro
- Centro Hospitalar de Lisboa Ocidental (CHLO), 1349-019 Lisboa, Portugal
| | - A. C. Sanches
- Instituto Português de Oncologia do Porto, Francisco Gentil (IPOPFG), 4200-162 Porto, Portugal
| | - L. Gomes
- Centro Hospitalar e Universitário de Coimbra (CHUC), 3000-075 Coimbra, Portugal
| | - I. Fernandes
- Centro Hospitalar Lisboa Norte, EPE (CHLN), 1649-035 Lisboa, Portugal
- Centro Académico de Medicina de Lisboa (CAML), 1649-035 Lisboa, Portugal
| | | | - J. Preto
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - B. D. Pereira
- Hospital Garcia de Orta, EPE, 2801-951 Almada, Portugal
| | - A. P. Marques
- Unidade Local de Saúde de Matosinhos, 4464-513 Senhora da Hora, Portugal
| | - F. Rodrigues
- Instituto Português de Oncologia de Coimbra, Francisco Gentil (IPOCFG), 3000-075 Coimbra, Portugal
| | - C. Amaral
- Centro Hospitalar do Porto-Hospital Santo António, 4099-001 Porto, Portugal
| | - G. Rocha
- Centro Hospitalar Gaia/Espinho (CHGE), 4434-502 Vila Nova de Gaia, Portugal
| | - J. C. Mellidez
- Centro Hospitalar do Baixo Vouga (CHBV), 3810-501 Aveiro, Portugal
| | - H. Simões
- Centro Hospitalar de Lisboa Ocidental (CHLO), 1349-019 Lisboa, Portugal
| | - J. M. Lopes
- Instituto de Investigação e Inovação em Saúde (i3S), 4200-135 Porto, Portugal
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), 4200-465 Porto, Portugal
- Faculdade de Medicina da Universidade do Porto (FMUP), 4200-319 Porto, Portugal
- Centro Hospitalar de São João (CHSJ), 4200-319 Porto, Portugal
| | - M. J. Bugalho
- Centro Hospitalar Lisboa Norte, EPE (CHLN), 1649-035 Lisboa, Portugal
- Centro Académico de Medicina de Lisboa (CAML), 1649-035 Lisboa, Portugal
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Fernandes I, Cabral R, Lima M. Treatment of Sézary syndrome with alemtuzumab: a case series (2009–2019). Eur J Cancer 2019. [DOI: 10.1016/s0959-8049(19)30610-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Sarajarvi V, Kalmar B, Fernandes I, Reilly M, Greensmith L. Do diverse Charcot-Marie-Tooth disease-causing mutations show convergent disease pathomechanisms? Investigation of mitochondrial dysfunction in CMT. Neuromuscul Disord 2018. [DOI: 10.1016/s0960-8966(18)30357-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fernandes I, Marques C, Évora A, Cruz L, de Freitas V, Calhau C, Faria A, Mateus N. Pharmacokinetics of table and Port red wine anthocyanins: a crossover trial in healthy men. Food Funct 2017; 8:2030-2037. [PMID: 28492692 DOI: 10.1039/c7fo00329c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
This study was designed to evaluate the pharmacokinetics of Port and table red wine anthocyanins in healthy men. Volunteers were recruited to drink 250 mL of a table red wine (221 mg of anthocyanins) and 150 mL of young Port red wine (49 mg of anthocyanins). Venous blood was collected from participants at 0, 15, 30, 60 and 120 min after wine ingestion. Urine samples were collected at baseline and at 120 min. Anthocyanins and anthocyanin metabolites in plasma and urine samples were quantified by HPLC-DAD and tentatively identified by LC-MS. Red wine anthocyanins were detected in their intact forms in both plasma and urine samples, but the glucuronylated metabolites of peonidin and malvidin (PnGlucr and MvGlucr) were the two main derivatives detected after both red wine consumptions. For the first time, and supported by the synthesis of Mv3Glucr, the main pathway followed by Mv3glc after absorption was described and involves anthocyanidin conjugation with glucuronic acid after glucose removal. Despite the lower total content of anthocyanins ingested when volunteers drank Port wine, no differences were observed in the plasma Cmax of MvGlucr and PnGlucr after table and Port red wine consumption. The relative bioavailability of anthocyanins in Port wine was 96.58 ± 5.74%, compared to the anthocyanins present in red wine. In conclusion, both Port and table red wines are good sources of bioavailable anthocyanins.
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Affiliation(s)
- I Fernandes
- REQUIMTE/LAQV, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto, Portugal.
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Fernandes I, Rueff MC, Portela S. TRANSDISCIPLINARITY IN STRATEGIC DECISIONS FOR ONCOLOGICAL TREATMENTS. Med Law 2015; 34:645-659. [PMID: 30759957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The current models for equity and access to new oncological treatments are under strain due to the economic and demographic crisis in Europe as well as the rising costs of innovative drugs. Cancer treatment needs a model of patient-centered care in which an interdisciplinary care plan, based on evidence-based practice is essential for patient wellbeing. Physicians should be focused in the doctor-patient relationship and informed consent is important, especially when new medicines are prescribed. Related with informed consent, there is therapeutic privilege. Moreover, utilitarianism and social justice have to be considered without compromising human dignity and the principle of economy cannot be ignored in the provision of public services. An interdisciplinary approach is essential for the new oncological drugs approval. Therefore, transdisciplinary decision between civil society, pharmaceuticals, healthcare professionals and policy makers is essential in order to assure quality, access to innovation and equity in oncological care.
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Macedo D, Mansinho A, Costa A, Fernandes I, Costa L. 3445 Hepatotoxicity and therapeutic response with trabectedin in soft tissue sarcomas. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31918-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Carneiro S, Fernandes I, Abuowda Y, Oliveira AA, Santos C, Palos A, Rosa A, Pinheiro P. Anti-vgkc Antibody-associated Limbic Encephalitis Presenting with Recurrent Catatonia. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30633-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Azevedo J, Fernandes I, Lopes P, Roseira I, Cabral M, Mateus N, Freitas V. Migration of phenolic compounds from different cork stoppers to wine model solutions: antioxidant and biological relevance. Eur Food Res Technol 2014. [DOI: 10.1007/s00217-014-2292-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fernandes I, Cruz Santos J, Lopes J, Rosa A, Pinheiro P. EPA-0158 – Generalized anxiety as main symptom of chronic appendicitis - a case report. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)77622-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Neves J, Fernandes I, Ribeiro J, Macedo D, Costa L. The Role of Nephrectomy in Metastatic Renal Cell Carcinoma - A Single Centre Analysis. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)33452-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Jara J, Costa C, Paixão L, Ramos Coutinho R, Fernandes I, Bento A. P-1251 - Smoking and schizophrenia - case study. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75418-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Favoretto BC, Ricardi R, Silva SR, Jacysyn JF, Fernandes I, Takehara HA, Faquim-Mauro EL. Immunomodulatory effects of crotoxin isolated from Crotalus durissus terrificus venom in mice immunised with human serum albumin. Toxicon 2011; 57:600-7. [PMID: 21223974 DOI: 10.1016/j.toxicon.2010.12.023] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 12/22/2010] [Accepted: 12/24/2010] [Indexed: 01/15/2023]
Abstract
Crotalus durissus terrificus venom and its main component, crotoxin (CTX), have the ability to down-modulate the immune system. Certain mechanisms mediated by cells and soluble factors of the immune system are responsible for the elimination of pathogenic molecules to ensure the specific protection against subsequent antigen contact. Accordingly, we evaluated the immunomodulatory effects of CTX on the immune response of mice that had been previously primed by immunisation with human serum albumin (HSA). CTX inoculation after HSA immunisation, along with complete Freund's adjuvant (CFA) or Aluminium hydroxide (Alum) immunisation, was able to suppress anti-HSA IgG1 and IgG2a antibody production. We showed that the inhibitory effects of this toxin are not mediated by necrosis or apoptosis of any lymphoid cell population. Lower proliferation of T lymphocytes from mice immunised with HSA/CFA or HSA/Alum that received the toxin was observed in comparison to the mice that were only immunised. In conclusion, CTX is able to exert potent inhibitory effects on humoral and cellular responses induced by HSA immunisation, even when injected after an innate immune response has been initiated.
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Affiliation(s)
- B C Favoretto
- Laboratório de Imunopatologia, Instituto Butantan, Av Vital Brasil, 1500, Butantã, CEP 05503-900, São Paulo, Brazil.
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Torres T, Fernandes I, Sanches M, Selores M. Foscarnet-induced penile ulceration. Acta Dermatovenerol Alp Pannonica Adriat 2011; 20:39-40. [PMID: 21879205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Foscarnet is used to treat herpes viruses, including drug-resistant cytomegalovirus (CMV) and herpes simplex viruses types 1 and 2 (HSV-1 and HSV-2). There are some reports of intravenous foscarnet-induced penile and vulvar ulceration. The authors report a case of the development of severe penile ulcers after the initiation of intravenous foscarnet therapy.
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Affiliation(s)
- T Torres
- Department of Dermatology, Centro Hospitalar do Porto - Hospital de Santo António, Edifício das Consultas Externas do Hospital Geral Santo António, Ex CICAP, Rua D Manuel II, 4100 Porto, Portugal.
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Torres T, Fernandes I, Costa V, Selores M. Photodynamic therapy as adjunctive therapy for morpheaform basal cell carcinoma. Acta Dermatovenerol Alp Pannonica Adriat 2011; 20:23-25. [PMID: 21879201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The authors decided to evaluate the possible use of methyl-aminolevulinate photodynamic therapy (MAL-PDT) as adjunctive therapy for morpheaform basal cell carcinoma prior to standard surgical excision in order to reduce tumor size and volume and to facilitate surgical treatment. It was observed that MAL-PDT may be an option as an adjunctive therapy prior to standard surgical excision of morpheaform basal cell carcinoma, leading to less invasive surgery.
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Affiliation(s)
- T Torres
- Department of Dermatology, Centro Hospitalar do Porto - Hospital de Santo António, Edifício das Consultas Externas do Hospital Geral Santo António, Ex CICAP, 4100 Porto, Portugal.
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Fernandes I, Assumpção GG, Silveira CRF, Faquim-Mauro EL, Tanjoni I, Carmona AK, Alves MFM, Takehara HA, Rucavado A, Ramos OHP, Moura-da-Silva AM, Gutiérrez JM. Immunochemical and biological characterization of monoclonal antibodies against BaP1, a metalloproteinase from Bothrops asper snake venom. Toxicon 2010; 56:1059-65. [PMID: 20674587 DOI: 10.1016/j.toxicon.2010.07.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2010] [Revised: 07/19/2010] [Accepted: 07/22/2010] [Indexed: 11/27/2022]
Abstract
BaP1 is a P-I class of Snake Venom Metalloproteinase (SVMP) relevant in the local tissue damage associated with envenomations by Bothrops asper, a medically-important species in Central America and parts of South America. Six monoclonal antibodies (MoAb) against BaP1 (MABaP1) were produced and characterized regarding their isotype, dissociation constant (K(d)), specificity and ability to neutralize BaP1-induced hemorrhagic and proteolytic activity. Two MABaP1 are IgM, three are IgG1 and one is IgG2b. The K(d)s of IgG MoAbs were in the nM range. All IgG MoAbs recognized conformational epitopes of BaP1 and B. asper venom components but failed to recognize venoms from 27 species of Viperidae, Colubridae and Elapidae families. Clone 7 cross-reacted with three P-I SVMPs tested (moojeni protease, insularinase and neuwiedase). BaP1-induced hemorrhage was totally neutralized by clones 3, 6 and 8 but not by clone 7. Inhibition of BaP1 enzymatic activity on a synthetic substrate by MABaP1 was totally achieved by clones 3 and 6, and partially by clone 8, but not by clone 7. In conclusion, these neutralizing MoAbs against BaP1 may become important tools to understand structure-function relationships of BaP1 and the role of P-I class SVMP in snakebite envenomation.
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Affiliation(s)
- I Fernandes
- Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brazil, 1500, Butantã, CEP 05503-900, São Paulo, SP, Brazil
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Sidi-Boumedine K, Duquesne V, Fernandes I, Marro S, Thiéry R. Evaluation of randomly amplified polymorphic DNA (RAPD) for discrimination of Coxiella burnetii ruminant strains isolated in France. Clin Microbiol Infect 2009; 15 Suppl 2:194-5. [DOI: 10.1111/j.1469-0691.2008.02271.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Plana M, Pons F, Fernandes I, Perez F, Pera J, Caminal J, Jiménez L, Del Muro XG, Piulats J. 9321 Metastatic uveal melanoma, clinical characteristics and survival: a single center experience on 58 patients. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71965-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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37
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Menezes MA, Rocha LB, Koga PCM, Fernandes I, Nara JM, Magalhães CA, Abe CM, Ayala CO, Burgos YK, Elias WP, Castro AFP, Piazza RMF. Identification of enteropathogenic and enterohaemorrhagic Escherichia coli strains by immunoserological detection of intimin. J Appl Microbiol 2009; 108:878-887. [PMID: 19709337 DOI: 10.1111/j.1365-2672.2009.04484.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To evaluate the sensitivity and specificity of polyclonal and monoclonal antibodies (Mabs) against intimin in the detection of enteropathogenic and enterohaemorrhagic Escherichia coli isolates using immunoblotting. METHODS AND RESULTS Polyclonal and Mabs against the intimin-conserved region were raised, and their reactivities were compared in enteropathogenic E. coli (EPEC) and enterohaemorrhagic E. coli (EHEC) isolates using immunoblotting analysis. In comparison with rat antiserum, rabbit anti-intimin IgG-enriched fraction had a stronger recognition pattern to a wide spectrum of intimin types in different EPEC and EHEC serotypes. On the other hand, murine monoclonal IgG2b specific to intimin, with dissociation constant of 1.3x10(-8) mol l(-1), failed in the detection of some of these isolates. CONCLUSION All employed antibodies showed 100% specificity, not reacting with any of the eae-negative isolates. The sensitivity range was according to the employed antisera, and 97% for rabbit anti-intimin IgG-enriched fraction, followed by 92% and 78% sensitivity with rat antisera and Mab. SIGNIFICANCE AND IMPACT OF THE STUDY The rabbit anti-intimin IgG-enriched fraction in immunoblotting analysis is a useful tool for EPEC and EHEC diagnoses.
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Affiliation(s)
- M A Menezes
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - L B Rocha
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - P C M Koga
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - I Fernandes
- Laboratório de Imunopatologia, Instituto Butantan, São Paulo, SP, Brazil
| | - J M Nara
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - C A Magalhães
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - C M Abe
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - C O Ayala
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Y K Burgos
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - W P Elias
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
| | - A F P Castro
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, SP, Brazil
| | - R M F Piazza
- Laboratório de Bacteriologia, Instituto Butantan, São Paulo, SP, Brazil
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Fernandes I, Rousset E, Dufour P, Sidi-Boumedine K, Cupo A, Thiéry R, Duquesne V. Serological and molecular characterization of AdaA: a potential marker of Q-fever abortion in goats? Clin Microbiol Infect 2009; 15 Suppl 2:163-4. [PMID: 19281458 DOI: 10.1111/j.1469-0691.2008.02209.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- I Fernandes
- Agence Française de Sécurité Sanitaire des Aliments, AFSSA, Unité Pathologie des Petits Ruminants, Sophia Antipolis, France
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Rafael A, Tanjoni I, Fernandes I, Moura-da-Silva A, Furtado M. An alternative method to access in vitro the hemorrhagic activity of snake venoms. Toxicon 2008; 51:479-87. [DOI: 10.1016/j.toxicon.2007.08.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2007] [Revised: 08/21/2007] [Accepted: 08/27/2007] [Indexed: 10/22/2022]
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Moura-da-Silva AM, Ramos OHP, Baldo C, Niland S, Hansen U, Ventura JS, Furlan S, Butera D, Della-Casa MS, Tanjoni I, Clissa PB, Fernandes I, Chudzinski-Tavassi AM, Eble JA. Collagen binding is a key factor for the hemorrhagic activity of snake venom metalloproteinases. Biochimie 2008; 90:484-92. [PMID: 18096518 DOI: 10.1016/j.biochi.2007.11.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Accepted: 11/26/2007] [Indexed: 11/24/2022]
Abstract
Snake venom metalloproteinases (SVMPs) are multifunctional enzymes involved in several symptoms following snakebite, such as severe local hemorrhage. Multidomain P-III SVMPs are strongly hemorrhagic, whereas single domain P-I SVMPs are not. This indicates that disintegrin-like and cysteine-rich domains allocate motifs that enable catalytic degradation of ECM components leading to disruption of capillary vessels. Interestingly, some P-III SVMPs are completely devoid of hemorrhagic activity despite their highly conserved disintegrin-like and cysteine-rich domains. This observation was approached in the present study by comparing the effects of jararhagin, a hemorrhagic P-III SVMP, and berythractivase, a pro-coagulant and non-hemorrhagic P-III SVMP. Both toxins inhibited collagen-induced platelet aggregation, but only jararhagin was able to bind to collagen I with high affinity. The monoclonal antibody MAJar 3, that neutralizes the hemorrhagic effect of Bothrops venoms and jararhagin binding to collagen, did not react with berythractivase. The three-dimensional structures of jararhagin and berythractivase were compared to explain the differential binding to collagen and MAJar 3. Thereby, we pinpointed a motif within the Da disintegrin subdomain located opposite to the catalytic domain. Jararhagin binds to both collagen I and IV in a triple helix-dependent manner and inhibited in vitro fibrillogenesis. The jararhagin-collagen complex retained the catalytic activity of the toxin as observed by hydrolysis of fibrin. Thus, we suggest that binding of hemorrhagic SVMPs to collagens I and IV occurs through a motif located in the Da subdomain. This allows accumulation of toxin molecules at the site of injection, close to capillary vessels, where their catalytic activity leads to a local hemorrhage. Toxins devoid of this motif would be more available for vascular internalization leading to systemic pro-coagulant effects. This reveals a novel function of the disintegrin domain in hemorrhage formation.
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Affiliation(s)
- A M Moura-da-Silva
- Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brasil, São Paulo, SP, Brazil.
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Adrião A, Vieira M, Fernandes I, Barbosa M, Sol M, Tenreiro R, Chambel L, Barata B, Zilhao I, Shama G, Perni S, Jordan S, Andrew P, Faleiro M. Marked intra-strain variation in response of Listeria monocytogenes dairy isolates to acid or salt stress and the effect of acid or salt adaptation on adherence to abiotic surfaces. Int J Food Microbiol 2008; 123:142-50. [DOI: 10.1016/j.ijfoodmicro.2007.12.016] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2007] [Revised: 12/05/2007] [Accepted: 12/18/2007] [Indexed: 11/30/2022]
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Roseiro C, Santos C, Sol M, Silva L, Fernandes I. Prevalence of biogenic amines during ripening of a traditional dry fermented pork sausage and its relation to the amount of sodium chloride added. Meat Sci 2006; 74:557-63. [DOI: 10.1016/j.meatsci.2006.03.030] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Revised: 02/24/2006] [Accepted: 03/13/2006] [Indexed: 11/16/2022]
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D'Agostino M, Wagner M, Vazquez-Boland JA, Kuchta T, Karpiskova R, Hoorfar J, Novella S, Scortti M, Ellison J, Murray A, Fernandes I, Kuhn M, Pazlarova J, Heuvelink A, Cook N. A validated PCR-based method to detect Listeria monocytogenes using raw milk as a food model--towards an international standard. J Food Prot 2004; 67:1646-55. [PMID: 15330529 DOI: 10.4315/0362-028x-67.8.1646] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A PCR assay with an internal amplification control was developed for Listeria monocytogenes. The assay has a 99% detection probability of seven cells per reaction. When tested against 38 L. monocytogenes strains and 52 nontarget strains, the PCR assay was 100% inclusive (positive signal from target) and 100% exclusive (no positive signal from nontarget). The assay was then evaluated in a collaborative trial involving 12 European laboratories, where it was tested against an additional 14 target and 14 nontarget strains. In that trial, the inclusivity was 100% and the exclusivity was 99.4%, and both the accordance (repeatability) and the concordance (reproducibility) were 99.4%. The assay was incorporated within a method for the detection of L. monocytogenes in raw milk, which involves 24 h of enrichment in half-Fraser broth followed by 16 h of enrichment in a medium that can be added directly into the PCR. The performance characteristics of the PCR-based method were evaluated in a collaborative trial involving 13 European laboratories. In that trial, a specificity value (percentage of correct identification of blank samples) of 81.8% was obtained; the accordance was 87.9%, and the concordance was 68.1%. The sensitivity (correct identification of milk samples inoculated with 20 to 200 L. monocytogenes cells per 25 ml) was 89.4%, the accordance was 81.2%, and the concordance was 80.7%. This method provides a basis for the application of routine PCR-based analysis to dairy products and other foodstuffs and should be appropriate for international standardization.
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Affiliation(s)
- M D'Agostino
- DEFRA Central Science Laboratory, Sand Hutton, York YO41 1LZ, UK
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Oshiro TM, Rafael A, Enobe CS, Fernandes I, Macedo-Soares MF. Comparison of different monoclonal antibodies against immunosuppressive proteins of Ascaris suum. Braz J Med Biol Res 2004; 37:223-6. [PMID: 14762577 DOI: 10.1590/s0100-879x2004000200009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The extract of Ascaris suum suppresses the humoral and cellular immune responses to unrelated antigens in the mouse. In order to further characterize the suppressive components of A. suum, we produced specific monoclonal antibodies which can provide an important tool for the identification of these proteins. The A. suum immunosuppressive fractions isolated by gel filtration from an extract of adult worms were used to immunize BALB/c mice. Popliteal lymph node cells taken from the immunized animals were fused with SP2/O myeloma cells and the cloned hybrid cells obtained were screened to determine the specificity of secreted antibodies. Three monoclonal antibodies named MAIP-1, MAIP-2 and MAIP-3 were selected and were shown to react with different epitopes of high molecular weight proteins from the A. suum extract. All antibody molecules have kappa-type light chains but differ in heavy chain isotype. MAIP-1 is a mouse IgM, MAIP-2 is an IgA immunoglobulin and MAIP-3 is an IgG1 immunoglobulin and they recognize the antigen with affinity constants of 1.3 x 10(10) M-1, 7.1 x 10(9) M-1 and 3.8 x 10(7) M-1, respectively. The proteins recognized by these monoclonal antibodies (PAS-1, PAS-2 and PAS-3) were purified from the crude extract by affinity chromatography and injected with ovalbumin in BALB/c mice in order to determine their suppressive activity on heterologous antibody production. It was demonstrated that these three proteins are able to significantly suppress anti-ovalbumin antibody secretion, with PAS-1 being more efficient than the others.
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Affiliation(s)
- T M Oshiro
- Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brasil 1500, 05503-900 São Paulo, SP, Brazil
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Abstract
Members of the nuclear receptor superfamily of ligand-regulated transcription factors are targets of a wide range of lipophilic signaling molecules as well as several drugs and xenobiotics that modulate many aspects of physiology and metabolism. Agonist binding to receptors is associated with recruitment of coactivators, which are essential for activation of target gene transcription. However, several biochemical and molecular genetic studies have shown that a full understanding of the function of agonist-bound receptors must also accommodate the recruitment of corepressors. These factors may attenuate agonist-induced transactivation, act more transiently as part of a cycle of cofactors recruited to target promoters by ligand-bound receptors, or function in hormone-dependent repression of target gene expression.
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Affiliation(s)
- I Fernandes
- Department of Physiology, McGill University, McIntyre Medical Sciences Bldg, 3655 Drummond St, Montreal, Quebec H3G 1Y6, Canada
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46
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Teixeira CFP, Zamunér SR, Zuliani JP, Fernandes CM, Cruz-Hofling MA, Fernandes I, Chaves F, Gutiérrez JM. Neutrophils do not contribute to local tissue damage, but play a key role in skeletal muscle regeneration, in mice injected withBothrops aspersnake venom. Muscle Nerve 2003; 28:449-59. [PMID: 14506717 DOI: 10.1002/mus.10453] [Citation(s) in RCA: 151] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Local tissue damage induced by crotaline snake venoms includes edema, myonecrosis, hemorrhage, and an inflammatory response associated with a prominent cellular infiltrate. The role of neutrophils in the local tissue damage induced by Bothrops asper snake venom and by myotoxin I, a phospholipase A2 isolated from this venom, was investigated. Male Swiss mice were pretreated with either an antimouse granulocyte rat monoclonal immunoglobulin G (IgG) antibody or with isotype-matched control antibody. No significant differences in these local effects were observed between mice pretreated with antigranulocyte antibodies and those receiving control IgG. Moreover, myotoxicity induced by B. asper myotoxin I was similar in neutrophil-depleted and control mice. The role of neutrophils in the process of skeletal muscle regeneration was also assessed. Muscle regeneration was assessed by quantifying the muscle levels of creatine kinase and by morphometric histological analysis of the area comprised by regenerating cells in damaged regions of skeletal muscle. Mice depleted of neutrophils and then injected with B. asper venom showed a more deficient regenerative response than mice pretreated with control IgG. Moreover, a drastic difference in the regenerative response was observed in mice injected with myotoxin I, because animals pretreated with control IgG showed a successful regeneration, whereas those depleted of neutrophils had abundant areas of necrotic tissue that had not been removed 7 days after injection, associated with reduced contents of creatine kinase. It is concluded that (1) neutrophils do not play a significant role in the acute local pathological alterations induced by the venom of B. asper, and (2) neutrophils play a prominent role in the process of skeletal muscle regeneration after injection of B. asper venom and myotoxin I, probably related to the phagocytosis of necrotic material and the recruitment of other inflammatory cells, two events directly associated with a successful muscle regenerative response.
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Affiliation(s)
- C F P Teixeira
- Pharmacology Laboratory, Instituto Butantan, Sao Paulo, Brazil
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Espíndola NM, Vaz AJ, Pardini AX, Fernandes I. Excretory/secretory antigens (ES) from in-vitro cultures of Taenia crassiceps cysticerci, and use of an anti-ES monoclonal antibody for antigen detection in samples of cerebrospinal fluid from patients with neurocysticercosis. Ann Trop Med Parasitol 2002; 96:361-8. [PMID: 12171617 DOI: 10.1179/000349802125001140] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Antigens were obtained from cysticerci of the ORF strain of Taenia crassiceps, by culture of cysts in protein-free hybridoma medium (PFHM). Budding of new vesicles was observed after 24-48 h. Excretory/secretory (ES) antigens (peptides of <20 kDa) were recovered in the medium after culture for 48 h. SDS-PAGE analysis of vesicular-fluid (VF) antigens (obtained by rupturing T. crassiceps cysticerci in PFHM) and the ES antigens indicated partial homology between the two preparations. ES peptides of 18- and 14-kDa were recognized by polyclonal antibodies produced in rabbits immunized either with the VF antigens or with a total-antigen preparation of T. solium cysticerci. Antibodies present in samples of serum or cerebrospinal fluid (CSF) from patients with neurocysticercosis also reacted with ES peptides. An anti-ES monoclonal antibody detected antigens in the CSF from 10 patients with neurocysticercosis, showing the antigenic homology of the ES antigens with those of T. solium cysticerci in human infections.
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Affiliation(s)
- N M Espíndola
- Laboratory of Clinical Immunology, Faculty of Pharmaceutical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 580, Bloco 17, 05508-900, São Paulo, SP, Brazil
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Brigatte P, Hoffmann F, Bernardi M, Giorgi R, Fernandes I, Takehara H, Barros S, Almeida M, Cury Y. Erratum to “Tolerance to the antinociceptive effect of Crotalus durissus terrificus snake venom in mice is mediated by pharmacodynamic mechanisms”. Toxicon 2002. [DOI: 10.1016/s0041-0101(01)00253-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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de Matos Gomes E, Nogueira E, Fernandes I, Belsley M, Paixão JA, Matos Beja A, Ramos Silva M, Martín-Gil J, Martín-Gil F, Mano JF. Synthesis, structure, thermal and non-linear optical properties of L-argininium hydrogen selenite. Acta Crystallogr B 2001; 57:828-32. [PMID: 11717482 DOI: 10.1107/s0108768101009880] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2001] [Accepted: 06/14/2001] [Indexed: 11/11/2022]
Abstract
L-Argininium hydrogen selenite (C(6)H(15)N(4)O(2)HSeO(3)) is a new semiorganic compound of the hydrogen selenite family with non-linear optical properties. The crystal lattice is monoclinic with unit-cell parameters a = 22.493 (5), b = 5.1624 (13), c = 9.730 (4) A, beta = 95.68 (3) degrees, V = 1124.3 (6) A(3), Z = 4, space group C2. Second-harmonic generation measurements performed on powder samples, using a Q-switched Nd:Yag laser (lambda = 1064 nm), showed the second-harmonic power to be about twice that of urea. Differential scanning calorimetry measurements revealed the existence of a phase transition with onset at 289 K.
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Affiliation(s)
- E de Matos Gomes
- Departamento de Física, Universidade do Minho, Largo do Paço, P-4719 Braga Codex, Portugal.
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Guilherme P, Fernandes I, Barbaro KC. Neutralization of dermonecrotic and lethal activities and differences among 32-35 kDa toxins of medically important Loxosceles spider venoms in Brazil revealed by monoclonal antibodies. Toxicon 2001; 39:1333-42. [PMID: 11384721 DOI: 10.1016/s0041-0101(01)00085-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Neutralization of dermonecrotic and lethal activities and differences among the principal toxic proteins (32-35 kDa) of medically important Loxosceles spider venoms in Brazil (Loxosceles gaucho, Loxosceles laeta and Loxosceles intermedia) were studied using monoclonal antibodies (MAbs) produced against the dermonecrotic component (35 kDa) of L. gaucho venom. MAb titers were 512,000 to homologous venom, between 2000 and 64,000 for L. intermedia venom and between 1000 and 64,000 for L. laeta venom. By Western blotting, MAbs could recognize mainly the 35 kDa protein of L. gaucho venom and with less intensity the 35 kDa protein of L. intermedia venom. These MAbs also recognized weakly or did not recognize the 32 kDa component of L. laeta venom. Only MoALg1 showed high affinity for L. gaucho venom and neutralized in vivo 90-97% of the dermonecrotic activity, besides delaying the lethality induced by homologous venom. MoALg1 maintained its capacity to neutralize the dermonecrotic activity, even when administered (i.v.) 6h after envenoming (i.d.). All MAbs obtained failed to neutralize the toxic activities of the heterologous venoms.These results suggest that different epitopes are present in the protein responsible for the dermonecrotic activity of Loxosceles venoms, and confirm the participation of other venom components during the local reaction process. This study also confirms the importance of antibodies for neutralization of dermonecrotic activity, even when administered some hours after envenoming, and emphasizes the differences of composition and toxicity of medically important Loxosceles venoms. These findings must be considered in order to improve loxoscelism immunotherapy.
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Affiliation(s)
- P Guilherme
- Laboratório de Imunopatologia, Instituto Butantan, Av. Vital Brazil 1500, 05503-900, SP, São Paulo, Brazil
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