1
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Vujovic A, de Rooij L, Chahi AK, Chen HT, Yee BA, Loganathan SK, Liu L, Chan DC, Tajik A, Tsao E, Moreira S, Joshi P, Xu J, Wong N, Balde Z, Jahangiri S, Zandi S, Aigner S, Dick JE, Minden MD, Schramek D, Yeo GW, Hope KJ. In Vivo Screening Unveils Pervasive RNA-Binding Protein Dependencies in Leukemic Stem Cells and Identifies ELAVL1 as a Therapeutic Target. Blood Cancer Discov 2023; 4:180-207. [PMID: 36763002 PMCID: PMC10150294 DOI: 10.1158/2643-3230.bcd-22-0086] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 11/30/2022] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
Acute myeloid leukemia (AML) is fueled by leukemic stem cells (LSC) whose determinants are challenging to discern from hematopoietic stem cells (HSC) or uncover by approaches focused on general cell properties. We have identified a set of RNA-binding proteins (RBP) selectively enriched in human AML LSCs. Using an in vivo two-step CRISPR-Cas9 screen to assay stem cell functionality, we found 32 RBPs essential for LSCs in MLL-AF9;NrasG12D AML. Loss-of-function approaches targeting key hit RBP ELAVL1 compromised LSC-driven in vivo leukemic reconstitution, and selectively depleted primitive malignant versus healthy cells. Integrative multiomics revealed differentiation, splicing, and mitochondrial metabolism as key features defining the leukemic ELAVL1-mRNA interactome with mitochondrial import protein, TOMM34, being a direct ELAVL1-stabilized target whose repression impairs AML propagation. Altogether, using a stem cell-adapted in vivo CRISPR screen, this work demonstrates pervasive reliance on RBPs as regulators of LSCs and highlights their potential as therapeutic targets in AML. SIGNIFICANCE LSC-targeted therapies remain a significant unmet need in AML. We developed a stem-cell-adapted in vivo CRISPR screen to identify key LSC drivers. We uncover widespread RNA-binding protein dependencies in LSCs, including ELAVL1, which we identify as a novel therapeutic vulnerability through its regulation of mitochondrial metabolism. This article is highlighted in the In This Issue feature, p. 171.
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Affiliation(s)
- Ana Vujovic
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Laura de Rooij
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - Ava Keyvani Chahi
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - He Tian Chen
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - Brian A. Yee
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California
| | - Sampath K. Loganathan
- Centre for Molecular and Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
| | - Lina Liu
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Derek C.H. Chan
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - Amanda Tajik
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - Emily Tsao
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Steven Moreira
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Pratik Joshi
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Joshua Xu
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
| | - Nicholas Wong
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Zaldy Balde
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Soheil Jahangiri
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Sasan Zandi
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Stefan Aigner
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California
| | - John E. Dick
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Mark D. Minden
- Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Canada
- Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Daniel Schramek
- Centre for Molecular and Systems Biology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Gene W. Yeo
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California
| | - Kristin J. Hope
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, Canada
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
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2
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Dion R, Moreira S, Bernaquez I, Fournier É, Levade I. 409 - Analyses descriptive et phylogénétique des cas dus au variant Lambda du SRAS-CoV-2, Québec. Rev Epidemiol Sante Publique 2022. [DOI: 10.1016/j.respe.2022.06.092] [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: 10/16/2022] Open
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3
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Silva MR, Paiva T, Reis C, Feliciano A, Gaspar T, Canhão H, Matos MG, Pereira C, Carreiro A, Lino A, Moreira S, Bernarda A, Gaspar S, Ramiro L, Fonseca J, Videira G. Effects of Covid-19 confinement on portuguese adults’ nutrition, physical activity and sleep. Clin Nutr ESPEN 2021. [PMCID: PMC8674507 DOI: 10.1016/j.clnesp.2021.09.218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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4
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Doumpas N, Söderholm S, Narula S, Moreira S, Doble BW, Cantù C, Basler K. TCF/LEF regulation of the topologically associated domain ADI promotes mESCs to exit the pluripotent ground state. Cell Rep 2021; 36:109705. [PMID: 34525377 DOI: 10.1016/j.celrep.2021.109705] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 06/10/2021] [Accepted: 08/23/2021] [Indexed: 11/19/2022] Open
Abstract
Mouse embryonic stem cells (mESCs) can be maintained in vitro in defined N2B27 medium supplemented with two chemical inhibitors for GSK3 and MEK (2i) and the cytokine leukemia inhibitory factor (LIF), which act synergistically to promote self-renewal and pluripotency. Here, we find that genetic deletion of the four genes encoding the TCF/LEF transcription factors confers mESCs with the ability to self-renew in N2B27 medium alone. TCF/LEF quadruple knockout (qKO) mESCs display dysregulation of several genes, including Aire, Dnmt3l, and IcosL, located adjacent to each other within a topologically associated domain (TAD). Aire, Dnmt3l, and IcosL appear to be regulated by TCF/LEF in a β-catenin independent manner. Moreover, downregulation of Aire and Dnmt3l in wild-type mESCs mimics the loss of TCF/LEF and increases mESC survival in the absence of 2iL. Hence, this study identifies TCF/LEF effectors that mediate exit from the pluripotent state.
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Affiliation(s)
- Nikolaos Doumpas
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland
| | - Simon Söderholm
- Wallenberg Centre for Molecular Medicine, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Division of Molecular Medicine and Virology, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden
| | - Smarth Narula
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Steven Moreira
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada
| | - Bradley W Doble
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8N 3Z5, Canada; Departments of Biochemistry and Medical Genetics & Pediatrics and Child Health, University of Manitoba, Winnipeg, MB R3E 0W2, Canada
| | - Claudio Cantù
- Wallenberg Centre for Molecular Medicine, Linköping University, Linköping, Sweden; Department of Biomedical and Clinical Sciences, Division of Molecular Medicine and Virology, Faculty of Medicine and Health Sciences, Linköping University, Linköping, Sweden.
| | - Konrad Basler
- Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.
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5
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Gonzalez-Bermejo J, Hajage D, Durand-Zaleski I, Arnal JM, Cuvelier A, Grassion L, Jaffre S, Lamia B, Pontier S, Prigent A, Rabec C, Raherison-Semjen C, Saint Raymond C, Soler J, Trzepizur W, Winck JC, Aguiar M, Chaves H, Conde B, Guimarães MJ, Lopes P, Mineiro A, Moreira S, Pamplona P, Rodrigues CM, Sousa S, Antón A, Córdoba-Izquierdo A, Embid C, Esteban González C, Ezzine F, Garcia P, González M, Guerassimova I, López D, Lujan M, Martí Beltran S, Martinez JM, Masa F, Pascual N, Peñacoba N, Resano P, Rey L, Rodríguez Jerez F, Roncero A, Sancho Chinesta J, Sayas Catalán J. Respiratory support in COPD patients after acute exacerbation with monitoring the quality of support (Rescue2-monitor): an open-label, prospective randomized, controlled, superiority clinical trial comparing hospital- versus home-based acute non-invasive ventilation for patients with hypercapnic chronic obstructive pulmonary disease. Trials 2020; 21:877. [PMID: 33092618 PMCID: PMC7578582 DOI: 10.1186/s13063-020-04672-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 08/12/2020] [Indexed: 12/03/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is expected to be the 3rd leading cause of death worldwide by 2020. Despite improvements in survival by using acute non-invasive ventilation (NIV) to treat patients with exacerbations of COPD complicated by acute hypercapnic respiratory failure (AHRF), these patients are at high risk of readmission and further life-threatening events, including death. Recent studies suggested that NIV at home can reduce readmissions, but in a small proportion of patients, and with a high level of expertise. Other studies, however, do not show any benefit of home NIV. This could be related to the fact that respiratory failure in patients with stable COPD and their response to mechanical ventilation are influenced by several pathophysiological factors which frequently coexist in the same patient to varying degrees. These pathophysiological factors might influence the success of home NIV in stable COPD, thus long-term NIV specifically adapted to a patient's "phenotype" is likely to improve prognosis, reduce readmission to hospital, and prevent death. In view of this conundrum, Rescue2-monitor (R2M), an open-label, prospective randomized, controlled study performed in patients with hypercapnic COPD post-AHRF, will investigate the impact of the quality of nocturnal NIV on the readmission-free survival. The primary objective is to show that any of 3 home NIV strategies ("rescue," "non-targeted," and "targeted") will improve readmission-free survival in comparison to no-home NIV. The "targeted" group of patients will receive a treatment with personalized (targeted) ventilation settings and extensive monitoring. Furthermore, the influence of comorbidities typical for COPD patients, such as cardiac insufficiency, OSA, or associated asthma, on ventilation outcomes will be taken into consideration and reasons for non-inclusion of patients will be recorded in order to evaluate the percentage of ventilated COPD patients that are screening failures. ClinicalTrials.gov NCT03890224 . Registered on March 26, 2019.
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6
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Duarte Ferreira R, Ornelas C, Silva S, Morgado R, Pereira D, Escaleira D, Moreira S, Valença J, Pedro E, Branco Ferreira M, Conceição Pereira Santos M, Barbosa M. Contribution of In Vivo and In Vitro Testing for The Diagnosis of Local Allergic Rhinitis. J Investig Allergol Clin Immunol 2019; 29:46-48. [PMID: 30785099 DOI: 10.18176/jiaci.0321] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- R Duarte Ferreira
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal.,Laboratório de Imunologia Clínica, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - C Ornelas
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - S Silva
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal.,Laboratório de Imunologia Clínica, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - R Morgado
- Laboratório de Fisiopatologia Respiratória, Serviço de Pneumologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - D Pereira
- Laboratório de Fisiopatologia Respiratória, Serviço de Pneumologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - D Escaleira
- Laboratório de Fisiopatologia Respiratória, Serviço de Pneumologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - S Moreira
- Laboratório de Fisiopatologia Respiratória, Serviço de Pneumologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - J Valença
- Laboratório de Fisiopatologia Respiratória, Serviço de Pneumologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - E Pedro
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal
| | - M Branco Ferreira
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal.,Clínica Universitária de Imunoalergologia, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - M Conceição Pereira Santos
- Laboratório de Imunologia Clínica, Instituto de Medicina Molecular, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal.,Clínica Universitária de Imunoalergologia, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
| | - M Barbosa
- Serviço de Imunoalergologia, Centro Hospitalar de Lisboa Norte, Lisbon, Portugal.,Clínica Universitária de Imunoalergologia, Faculdade de Medicina da Universidade de Lisboa, Lisbon, Portugal
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7
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Ly M, Rentas S, Vujovic A, Wong N, Moreira S, Xu J, Holzapfel N, Bhatia S, Tran D, Minden MD, Draper JS, Hope KJ. Diminished AHR Signaling Drives Human Acute Myeloid Leukemia Stem Cell Maintenance. Cancer Res 2019; 79:5799-5811. [PMID: 31519687 DOI: 10.1158/0008-5472.can-19-0274] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 07/31/2019] [Accepted: 09/10/2019] [Indexed: 11/16/2022]
Abstract
Eliminating leukemic stem cells (LSC) is a sought after therapeutic paradigm for the treatment of acute myeloid leukemia (AML). While repression of aryl hydrocarbon receptor (AHR) signaling has been shown to promote short-term maintenance of primitive AML cells in culture, no work to date has examined whether altered AHR signaling plays a pathologic role in human AML or whether it contributes at all to endogenous LSC function. Here, we show AHR signaling is repressed in human AML blasts and preferentially downregulated in LSC-enriched populations within leukemias. A core set of AHR targets are uniquely repressed in LSCs across diverse genetic AML subtypes. In vitro and in vivo administration of the specific AHR agonist FICZ significantly impaired leukemic growth, promoted differentiation, and repressed self-renewal. Furthermore, LSCs suppressed a set of FICZ-responsive AHR target genes that function as tumor suppressors and promoters of differentiation. FICZ stimulation did not impair normal hematopoietic stem and progenitor (HSPC) function, and failed to upregulate a prominent LSC-specific AHR target in HSPCs, suggesting that differential mechanisms govern FICZ-induced AHR signaling manifestations in HSCs versus LSCs. Altogether, this work highlights AHR signaling suppression as a key LSC-regulating control mechanism and provides proof of concept in a preclinical model that FICZ-mediated AHR pathway activation enacts unique transcriptional programs in AML that identify it as a novel chemotherapeutic approach to selectively target human LSCs. SIGNIFICANCE: The AHR pathway is suppressed in leukemic stem cells (LSC), therefore activating AHR signaling is a potential therapeutic option to target LSCs and to treat acute myeloid leukemia.
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Affiliation(s)
- Michelle Ly
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Stefan Rentas
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Ana Vujovic
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Nicholas Wong
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Steven Moreira
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Joshua Xu
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Nicholas Holzapfel
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Sonam Bhatia
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Damian Tran
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Mark D Minden
- Department of Medicine, Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Jonathan S Draper
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Kristin J Hope
- Department of Biochemistry and Biomedical Sciences, Stem Cell and Cancer Research Institute, McMaster University, Hamilton, Ontario, Canada.
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8
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Morberg D, Alzate López Y, Moreira S, Prata N, Riley L, Burroughs Peña M. The rheumatic heart disease healthcare paradox: disease persistence in slums despite universal healthcare coverage—a provider perspective qualitative study. Public Health 2019; 171:15-23. [DOI: 10.1016/j.puhe.2019.03.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 03/16/2019] [Accepted: 03/20/2019] [Indexed: 01/19/2023]
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9
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Moreira S, Saraiva FA, Cerqueira RJ, Melo R, Lourenco AP, Amorim MJ, Almeida J, Pinho P, Leite-Moreira AF. P3520Low vs. high-gradient severe aortic stenosis: clinical results and ventricular remodeling. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3520] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Moreira
- Faculty of Medicine University of Porto, Surgery and Physiology, Porto, Portugal
| | - F A Saraiva
- Faculty of Medicine University of Porto, Surgery and Physiology, Porto, Portugal
| | - R J Cerqueira
- Sao Joao Hospital, Cardiothoracic Surgery, Porto, Portugal
| | - R Melo
- Faculty of Medicine University of Porto, Surgery and Physiology, Porto, Portugal
| | - A P Lourenco
- Faculty of Medicine University of Porto, Surgery and Physiology, Porto, Portugal
| | - M J Amorim
- Sao Joao Hospital, Cardiothoracic Surgery, Porto, Portugal
| | - J Almeida
- Sao Joao Hospital, Cardiothoracic Surgery, Porto, Portugal
| | - P Pinho
- Sao Joao Hospital, Cardiothoracic Surgery, Porto, Portugal
| | - A F Leite-Moreira
- Faculty of Medicine University of Porto, Surgery and Physiology, Porto, Portugal
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10
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Singh SK, Manoranjan B, Dvorkin-Gheva A, Venugopal C, Moreira S, Kameda-Smith M, Subapanditha M, Adile A, Bakhshinyan D, Savage N, Yarascavitch B, Ajani O, Fleming A, Doble B. Abstract 148: Canonical Wnt activation as a therapeutic strategy in pediatric medulloblastoma. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-148] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Brain tumors represent the leading cause of childhood cancer mortality, of which medulloblastoma (MB) is the most frequent malignant pediatric brain tumor. Current molecular subgroups of MB recognize distinct disease entities of which activated Wnt signaling (monosomy 6, exon 3 mutations in CTNNB1, and Wnt gene signature) is associated with a distinct subgroup and the best overall outcome. In contrast, only non-Wnt MBs are characterized by metastatic disease, increased rate of recurrence, and poor overall survivorship. Given the excellent clinical outcome in patients with Wnt-driven MB, we aimed to convert treatment-resistant MB subgroups into an ostensibly benign tumor through selective activation of the canonical Wnt pathway. Initial characterization of patient-derived Wnt and non-Wnt MB lines demonstrated a significant reduction in in vitro self-renewal and proliferative capacity of Wnt MBs. This was further validated by RNA-seq, which identified a marked reduction in the expression of stem cell self-renewal genes Bmi1 and Sox2 in Wnt MBs compared to non-Wnt MBs. Further, Wnt MB-derived xenografts maintained a significant increase in overall survival compared to non-Wnt MB xengrafts, further highlighting the protective nature of activated Wnt signaling in MB. Activated Wnt signaling by way of small molecule Wnt agonists in treatment-refractory MBs resulted in decreased in vitro self-renewal and expression of self-renewal genes, Bmi1 and Sox2. In order to validate the therapy-sensitive nature of Wnt-activated cells, we developed stable patient-derived lines containing a 7XTOPFlash reporter for endogenous Wnt signaling. Rare subclonal Wnt-active cells demonstrated a reduced self-renewal and tumor-initiating capacity through in vivo limiting dilution assays when compared to bulk Wnt-inactive cells. The therapeutic relevance of these findings were demonstrated with an in vivo survival advantage in those mice with orthotopic injections of cells with endogenous Wnt activity when compared to xenografts generated from Wnt-inactive cells. To develop a rationale clinical therapeutic, we used a novel substrate-competitive peptide inhibitor for GSK. Treatment with our peptide inhibitor showed a significant reduction in tumor burden with a corresponding increase in survival of patient-derived tumors that were otherwise treatment-resistant. The clinical utility of our findings is further supported by our analysis of integrated genomics data from 763 primary MBs, in which a validated Wnt gene signature was found to predict improved survivorship among children with poor-outcome and metastatic MBs. Our work establishes activated Wnt signaling as a novel treatment paradigm in childhood MB, identifies a rationale therapeutic approach for recurrent MB, and provides evidence for the context-specific tumor suppressive function of the canonical Wnt pathway.
Citation Format: Sheila Kumari Singh, Branavan Manoranjan, Anna Dvorkin-Gheva, Chitra Venugopal, Steven Moreira, Michelle Kameda-Smith, Minomi Subapanditha, Ashley Adile, David Bakhshinyan, Neil Savage, Blake Yarascavitch, Olufemi Ajani, Adam Fleming, Bradley Doble. Canonical Wnt activation as a therapeutic strategy in pediatric medulloblastoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 148.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Neil Savage
- McMaster University, Hamilton, Ontario, Canada
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11
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Kumaran V, Li J, Pollack C, Moreira S. A227 ASSESSING THE BIOEQUIVALENCE OF NON-PRESCRIPTION ESOMEPRAZOLE 20 MG BANDED CAPSULES AND MULTIPLE-UNIT PELLET SYSTEM TABLETS UNDER FASTED AND FED CONDITION. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.228] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- V Kumaran
- Pfizer Consumer Healthcare, Madison, NJ
| | - J Li
- Pfizer Consumer Healthcare, Madison, NJ
| | - C Pollack
- Pfizer Consumer Healthcare, Madison, NJ
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12
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Pereira C, Moreira S, Barros A, Fernandes D, Valença J, Pinto P, Barbara C. Can we truly change from polysomnography to polygraphy in obstructive sleep apnea? A comparison between these to levels of sleep studies in a population of patients with obstructive sleep apnea. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.757] [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: 10/18/2022]
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13
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Moreira S, Polena E, Gordon V, Abdulla S, Mahendram S, Cao J, Blais A, Wood GA, Dvorkin-Gheva A, Doble BW. A Single TCF Transcription Factor, Regardless of Its Activation Capacity, Is Sufficient for Effective Trilineage Differentiation of ESCs. Cell Rep 2017; 20:2424-2438. [DOI: 10.1016/j.celrep.2017.08.043] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 06/12/2017] [Accepted: 08/11/2017] [Indexed: 01/22/2023] Open
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14
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Winck JC, Moreira S, Bugalho A, Drummond M, Ferreira AJ, Guimarães M, Reis-Ferreira JM. What exactly Portuguese respiratory professionals aim for their scientific Society: Findings from the VOICE online survey. Rev Port Pneumol (2006) 2017; 23:225-226. [PMID: 28392156 DOI: 10.1016/j.rppnen.2017.02.008] [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] [Received: 01/11/2017] [Revised: 02/13/2017] [Accepted: 02/15/2017] [Indexed: 10/19/2022] Open
Affiliation(s)
- J C Winck
- Faculdade de Medicina, Universidade do Porto, Porto, Portugal.
| | - S Moreira
- Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - A Bugalho
- Faculdade Ciências Médicas, Universidade Nova de Lisboa, Lisboa, Portugal
| | - M Drummond
- Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - A J Ferreira
- Centro Hospitalar e Universitário de Coimbra, Coimbra, Portugal
| | - M Guimarães
- Centro Hospitalar de Vila Nova de Gaia, Vila Nova de Gaia, Portugal
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Moreira S, Wood L, Marini-Bettolo C, Guglieri M, McMacken G, Bailey G, Mayhew A, Muni R, Eglon G, Smith D, Williams M, Lochmüller H, Evangelista T. Respiratory involvement in Facioscapulohumeral Dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/s0960-8966(17)30244-4] [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] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Winck JC, Bugalho A, Drummond M, Ferreira AJ, Moreira S. Portuguese Pulmonology footprint in Europe: From abstracts to papers and grants. Rev Port Pneumol (2006) 2016; 22:360-362. [PMID: 26897096 DOI: 10.1016/j.rppnen.2015.12.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 12/21/2015] [Accepted: 12/22/2015] [Indexed: 06/05/2023] Open
Affiliation(s)
- J C Winck
- Faculdade de Medicina da Universidade do Porto, Portugal.
| | - A Bugalho
- Faculdade Ciências Médicas da Universidade Nova de Lisboa, Portugal
| | - M Drummond
- Faculdade de Medicina da Universidade do Porto, Portugal
| | - A J Ferreira
- Faculdade de Medicina da Universidade de Coimbra, Portugal
| | - S Moreira
- Faculdade de Medicina da Universidade de Lisboa, Portugal
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Cordeiro Sousa D, Moreira S, Leal I, Dionísio P, Abegão Pinto L, Marques-Neves C. Hypoxia and retinal blood flow changes: a study using OCT-Angiography. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0484] [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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Leal I, Cordeiro Sousa D, Moreira S, Dionisio P, Abegao Pinto L, Marques-Neves C. Normobaric hypoxia induces changes in mean ocular perfusion pressure. Acta Ophthalmol 2016. [DOI: 10.1111/j.1755-3768.2016.0496] [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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Guerreiro IM, Branco M, Moreira S, Valença J. Impact of bariatric surgery in obstructive sleep apnea in obese patients. Rev Port Pneumol (2006) 2016; 23:298-299. [PMID: 27050438 DOI: 10.1016/j.rppnen.2016.01.008] [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] [Received: 10/25/2015] [Revised: 01/10/2016] [Accepted: 01/30/2016] [Indexed: 11/25/2022] Open
Affiliation(s)
- I M Guerreiro
- Faculdade de Medicina da Universidade de Lisboa (FML), Portugal.
| | - M Branco
- Faculdade de Medicina da Universidade de Lisboa (FML), Portugal
| | - S Moreira
- Serviço de Pneumologia do Hospital de Santa Maria (HSM), Centro Hospitalar Lisboa Norte (CHLN)/Faculdade de Medicina da Universidade de Lisboa, Portugal
| | - J Valença
- Serviço de Pneumologia do Hospital de Santa Maria (HSM), Centro Hospitalar Lisboa Norte (CHLN)/Faculdade de Medicina da Universidade de Lisboa, Portugal
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Ferreira J, Ferrer C, Cândido S, Moreira S, Jorge A, Carvalho M, Branco J, Glória F, Oliveira C. CP-186 Can the antiretroviral therapy effectiveness be connected with treatment simplification? Eur J Hosp Pharm 2016. [DOI: 10.1136/ejhpharm-2016-000875.186] [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: 11/04/2022] Open
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Moreira S, Jorge A, Oliveira C, Glória F, Ferreira J, Branco J, Carvalho M, Cândido S, Ferrer C. PP-035 The outcome of microbiological monitoring in cytotoxic drug preparation. Eur J Hosp Pharm 2016. [DOI: 10.1136/ejhpharm-2016-000875.474] [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: 11/03/2022] Open
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Manoranjan B, Venugopal C, Mahendram S, Moreira S, Hallett R, Vijayakumar T, Bakhshinyan D, McFarlane N, Hassell J, Doble B, Singh S. MB-15 * ACTIVATED Wnt SIGNALING TARGETS Sox2+ TREATMENT-REFRACTORY Shh-DEPENDENT MEDULLOBLASTOMA STEM CELLS. Neuro Oncol 2015. [DOI: 10.1093/neuonc/nov061.91] [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] Open
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Moreira S, Serfaty A, Pedrero C, Bréart G. Construction du taux de mortinatalité : qualité des données, circuit de recueil et place des acteurs. L’exemple de la Seine-Saint-Denis, 2011/2013 (Projet NéMoSI). Rev Epidemiol Sante Publique 2015. [DOI: 10.1016/j.respe.2015.01.056] [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] Open
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Coutinho I, Moreira S, Ramos L, Robalo Cordeiro M, Cardoso J, Gonçalo M, Tellechea O. Plaque-like papular xanthoma: a new variant of non-Langerhans cell disease. J Eur Acad Dermatol Venereol 2014; 30:332-3. [DOI: 10.1111/jdv.12725] [Citation(s) in RCA: 1] [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: 11/27/2022]
Affiliation(s)
- I. Coutinho
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
| | - S. Moreira
- Department of Internal Medicine; Coimbra University Hospital; Coimbra Portugal
| | - L. Ramos
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
| | - M. Robalo Cordeiro
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
| | - J. Cardoso
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
| | - M. Gonçalo
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
| | - O. Tellechea
- Department of Dermatology; Coimbra University Hospital; Coimbra Portugal
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Petrova M, Cunha J, Moreira S, Pereira de Moura J, Carvalho A. P394: Secondary adrenal insufficiency presenting as severe hyponatraemia. A case report. Eur Geriatr Med 2014. [DOI: 10.1016/s1878-7649(14)70558-3] [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: 11/29/2022]
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Souza L, Canteras F, Moreira S. Analyses of heavy metals in sewage and sludge from treatment plants in the cities of Campinas and Jaguariúna, using synchrotron radiation total reflection X-rayfluorescence. Radiat Phys Chem Oxf Engl 1993 2014. [DOI: 10.1016/j.radphyschem.2013.01.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Moreira S, Rodrigues R, Pejanovic N, Rodrigues J, Barbara C, Ferreira Moita L. The expression of the Per2 clock gene is up-regulated in non-treated osas patients and normalizes its mRNA levels upon positive pressure treatment. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.025] [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: 11/24/2022]
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Abstract
This study aimed to examine the acute effects of cryotherapy on knee position sense and to determine the time period necessary to normalize joint position sense when exercising after cryotherapy. 12 subjects visited the laboratory twice, once for cryotherapy followed by 30 min of exercise on a cycloergometer and once for cryotherapy followed by 30 min of rest. Sessions were randomly determined and separated by 48 h. Cryotherapy was applied in the form of ice bag, filled with 1 kg of crushed ice, for 20 min. Knee position sense was measured at baseline, after cryotherapy and every 5 min after cryotherapy removal until a total of 30 min. The main effect of cryotherapy was significant showing an increase in absolute (F7,154=43.76, p<0.001) and relative (F7,154=7.97, p<0.001) errors after cryotherapy. The intervention after cryotherapy (rest vs. exercise) revealed a significant main effect only for absolute error (F7,154=4.05, p<0.001), i.e., when subjects exercised after cryotherapy, the proprioceptive acuity reached the baseline values faster (10 min vs. 15 min). Our results indicated that the deleterious effect of cryotherapy on proprioception is mitigated by low intensity exercise, being the time necessary to normalize knee position sense reduced from 15 to 10 min.
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Affiliation(s)
- F Ribeiro
- CESPU, Polytechnic Health Institute of the North, Physiotherapy Department, Gandra PRD, Portugal.
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Ribeiro C, Moreira S, Correia V, Sencadas V, Rocha J, Gama FM, Gómez Ribelles JL, Lanceros-Méndez S. Enhanced proliferation of pre-osteoblastic cells by dynamic piezoelectric stimulation. RSC Adv 2012. [DOI: 10.1039/c2ra21841k] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Santos MSV, Vieira SS, Tavares FB, Andrade A, Manno MC, Costa HS, Moreira S. Desempenho, carcaça e cortes de frangos caipira francês barré (gris barré cou plumé). ARCH ZOOTEC 2011. [DOI: 10.21071/az.v61i234.2802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objetivou-se analisar os efeitos dos níveis de energia metabolizável e da idade de abate sobre o desempenho zootécnico, rendimento de carcaça e cortes de frangos da linhagem Caipira Francês Barré. O experimento foi conduzido em galpão experimental localizado em Parauapebas, PA. Foram utilizados 192 pintos, mistos, de 1 dia, criados em sistema intensivo. O delineamento experimental utilizado foi inteiramente casualizado, com 3 tratamentos. Cada tratamento foi formado de 4 repetições, sendo a unidade experimental 1 box de 16 aves. Os tratamentos foram definidos de acordo com os níveis de energia metabolizável das rações inicial (1 a 28 dias) e final (29 a 90 dias), respectivamente: T1 - 3000 e 3100 kcal de EM/kg; T2 - 3100 e 3200 kcal de EM/kg; T3 - 3200 e 3300 kcal de EM/kg. As variáveis estudadas foram peso inicial, peso final, consumo de ração e conversão alimentar, proteína bruta consumida, proteína metabolizada consumida, eficiência energética e eficiência protéica. As características de carcaças das aves, analisadas com 77, 84 e 91 dias de idade, foram o rendimento de carcaça, peito, coxas, sobrecoxas, asa, dorso, asas, pés, cabeça e pescoço. A análise estatística dos dados foi realizada utilizando o procedimento ANOVA, para um modelo inteiramente casualizado, com o programa Sistema para análise estatística e genética (SAEG, 2007). As diferenças entre as médias das variáveis estudadas foram realizadas pelo Teste de Tukey a um nível de 5%. Os níveis de energia nas dietas não interferiram no desempenho zootécnico e no rendimento de carcaça, peito, coxas, sobrecoxas, asas, pés e cabeça + pescoço das aves. O nível de 3200 kcal de EM/kg proporcionou melhor rendimento de dorso. A proteína bruta e a energia metabolizada consumida pelas aves melhoraram com o incremento energético da ração, durante a fase de engorda. A idade de abate não influenciou no rendimento de carcaça, entretanto as aves abatidas aos 90 dias de idade apresentaram maior rendimento de peito.
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Neuparth T, Moreira S, Santos MM, Reis-Henriques MA. Hazardous and Noxious Substances (HNS) in the marine environment: prioritizing HNS that pose major risk in a European context. Mar Pollut Bull 2011; 62:21-28. [PMID: 20933247 DOI: 10.1016/j.marpolbul.2010.09.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2010] [Revised: 09/07/2010] [Accepted: 09/09/2010] [Indexed: 05/30/2023]
Abstract
Increases in the maritime transportation of Hazardous and Noxious Substances (HNS), alongside the need for an effective response to HNS spills have led environmental managers and the scientific community to focus attention on HNS spill preparedness and responsiveness. In the context of the ARCOPOL project, a weight-of-evidence approach was developed aimed at prioritizing HNS that pose major environmental risks to European waters. This approach takes into consideration the occurrence probability of HNS spills in European Atlantic waters and the severity of exposure associated with their physico-chemical properties and toxicity to marine organisms. Additionally, a screening analysis of the toxicological information available for the prioritization of HNS was performed. Here we discuss the need for a prioritization methodology to select HNS that are likely to cause severe marine environmental effects as an essential step towards the establishment of a more effective preparedness and response to HNS incidents.
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Affiliation(s)
- T Neuparth
- CIMAR/CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Rua dos Bragas 177, 4050-123 Porto, Portugal.
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Moreira S, Branco M, Regalado A. 499 FIBROMYALGIA AND DEPRESSION: WHAT RELATION? A CLINICAL CASE REPORT. Eur J Pain 2009. [DOI: 10.1016/s1090-3801(09)60502-4] [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: 11/16/2022]
Affiliation(s)
- S. Moreira
- Centro Hospitalar do Porto — Hospital Santo António, Porto, Portugal
| | - M. Branco
- Centro Hospitalar do Porto — Hospital Santo António, Porto, Portugal
| | - A. Regalado
- Centro Hospitalar do Porto — Hospital Santo António, Porto, Portugal
- Chronic Pain Unit, Porto, Portugal
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Aguiar M, Valença J, Felizardo M, Caeiro F, Moreira S, Staats R, Bugalho de Almeida AA. Obstructive sleep apnoea syndrome as a cause of road traffic accidents. Rev Port Pneumol 2009; 15:419-431. [PMID: 19401792] [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: 05/27/2023] Open
Abstract
UNLABELLED Several studies have demonstrated that obstructive sleep apnoea syndrome (OSAS) patients have a higher rate of road traffic accidents. Our study aimed to analyse any differences in OSAS patients between those who reported having had road traffic accidents and/or near misses and those who did not. METHODS We studied 163 patients with OSAS (apnoea- hypopnoea index (AHI)>10/h) diagnosed using nocturnal polysomnography (NPSG), all drivers, 18.4% of whom drove for a living. Patients were asked at their first clinical interview to self-report road traffic accidents and/or near misses over the past 3 years which had been caused by abnormal daytime drowsiness. This allowed patients to be divided into two groups, those who had had road traffic accidents and/or near misses and those who had not. Both were compared as to age, body mass index (BMI), Epworth Sleepiness Scale (ESS), daytime PaO2 and PaCO2, Functional Outcomes of Sleep Questionnaire (FOSQ) test and NPSG data. This latter was total sleep time (TTS), sleep efficiency, sleep stages, arousal index (ARI), AHI, minimal and average SaO2, % of time with SaO2 < 90% (T90), desaturation index (ODI), total duration of apnoea-hypopnoea (TDAH) (T test). RESULTS Group I (no road traffic accidents) No=89 patients; group II (road traffic accidents) No=74 patients. Age (years) was 57.6+/-11.8 vs. 54.7+/-10.9 (ns); male gender, 75% vs. 78.4%; ESS, 12.3+/-5.4 vs. 17.6+/-4.3 (p<0.001); BMI, (Kg/m2) 36.2+/-8.1 vs. 35.6+/-6.3 (ns); PaO2 (mmHg), 76.1+/-11.4 vs. 78.5+/-12.6 (ns); PaCO2 (mmHg), 42.6+/-5.1 vs. 42.2+/-4.7 (ns); FOSQ, 15.1+/-3.1 vs. 12.9+/-3.4 (p<0.001). NPSG data revealed differences only in AHI: 45.0+/-21.6 vs. 56.2+/-29.7 (p=0.01) and in TDAH (minutes), 98.5+/-63.7 vs. 133.3+/-83.2 (p=0,005). CONCLUSIONS In our experience patients who had road traffic accidents and/or near misses had a more severe OSAS, with higher AHI, excessive daytime sleepiness and lower quality of life.
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Affiliation(s)
- M Aguiar
- Pulmonology Unit I, Hospital de Santa Maria, CHLN, EPE, Lisboa.
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Vives AES, Moreira S, Brienza SMB, Zucchi OLAD, Nascimento Filho VF. Analysis of fish samples for environmental monitoring and food safety assessment by synchrotron radiation total reflection X-ray fluorescence. J Radioanal Nucl Chem 2006. [DOI: 10.1007/s10967-006-0333-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Moreira S, Vives AES, Zucchi OLAD, de Jesus EFO, Nascimento Filho VF, Brienza SMB. Analysis of beers from Brazil with synchrotron radiation total reflection X-ray fluorescence. J Radioanal Nucl Chem 2006. [DOI: 10.1007/s10967-006-0325-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vives AES, Moreira S, Brienza SMB, Zucchi OLA, Nascimento Filho VF. Synchrotron radiation total reflection X-ray fluorescence (SR-TXRF) for evaluation of food contamination. J Radioanal Nucl Chem 2006. [DOI: 10.1007/s10967-006-0322-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Costa CHN, Werneck GL, Rodrigues L, Santos MV, Araújo IB, Moura LS, Moreira S, Gomes RBB, Lima SS. Household structure and urban services: neglected targets in the control of visceral leishmaniasis. Ann Trop Med Parasitol 2005; 99:229-36. [PMID: 15829132 DOI: 10.1179/136485905x28018] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Visceral leishmaniasis (VL) caused by Leishmania chagasi is a growing public-health problem in many parts of the New World. Although several studies have focused on the consequences of environmental damage, human migration and land occupation on the incidence of VL, the effects on the disease of the substandard living conditions that often result from the process of urbanization have not been investigated in detail. The present study was based in the Brazilian city of Teresina, where, since 1980, there have been two large outbreaks of VL (one in 1981-1985 and the other in 1993-1996), each involving at least 1000 newly reported cases. The role of household structure and the provision of urban services in the city, as predictors of the occurrence of VL, was studied in a case-control investigation. After controlling for age, crowding, and the background incidence of VL in the area where the subjects lived, the risk of acquiring the disease was found to be significantly higher for those who lived in houses with an inadequate sewage system and those who had no regular rubbish collection. Improving household structure and providing basic urban services might be effective strategies for controlling the spread of VL in urban areas.
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Affiliation(s)
- C H N Costa
- Instituto de Doenças Tropicais Nathan Portella and Universidade Federal do Piauí, Rua Governador Raimundo Artur de Vasconcelos, 151, CEP 64001-450, Teresina, PI, Brazil
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Machado PGP, Felipe CR, Park SI, Garcia R, Moreira S, Casarini D, Franco M, Alfieri F, Tedesco-Silva H, Medina-Pestana JO. Preservation of graft function in low-risk living kidney transplant recipients treated with a combination of sirolimus and cyclosporine. Braz J Med Biol Res 2004; 37:1303-12. [PMID: 15334195 DOI: 10.1590/s0100-879x2004000900004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 01/22/2023] Open
Abstract
The use of sirolimus (SRL) in combination with full doses of cyclosporin A (CsA) results in reduced one-year kidney allograft function, which is associated with shorter long-term allograft survival. We determined the effect of reduced CsA exposure on graft function in patients receiving SRL and prednisone. Ninety recipients of living kidney transplants receiving SRL (2 mg/day, po) were compared to 35 recipients receiving azathioprine (AZA, 2 mg kg-1 day-1, po). All patients also received CsA (8-10 mg kg-1 day-1, po) and prednisone (0.5 mg kg-1 day-1). Efficacy end-point was a composite of biopsy-confirmed acute rejection, graft loss, or death at one year. Graft function was measured by creatinine, creatinine clearance, and graft function deterioration between 3 and 12 months (delta1/Cr). CsA concentrations in patients receiving SRL were 26% lower. No differences in one-year composite efficacy end-point were observed comparing SRL and AZA groups (18 vs 20%) or in the incidence of biopsy-proven acute rejection (14.4 and 14.3%). There were no differences in mean +/- SD creatinine (1.65 +/- 0.46 vs 1.60 +/- 0.43 mg/dl, P = 0.48) or calculated creatinine clearances (61 +/- 15 vs 62 +/- 13 ml/min, P = 0.58) at one year. Mean +/- SD delta1/Cr (-11 +/- 17 vs -14 +/- 15%, P = 0.7) or the percentage of patients with >20% (26 vs 31%, P = 0.6) or >30% delta1/Cr (19 vs 17%, P = 1) did not differ between the two groups. The use of 2-mg fixed oral doses of SRL and reduced CsA exposure was effective in preventing acute rejection and preserving allograft function.
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Affiliation(s)
- P G P Machado
- Divisão de Nefrologia, Hospital do Rim e Hipertensão, Universidade Federal de São Paulo, Brasil
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Moreira S, Lopes A, Cadarso F, Coutinho A, Leitão C, Dias F. C1. Pneumonia adquirida na comunidade (PAC) num hospital central – comparação de um grupo de doentes idosos com um grupo de não idosos. Revista Portuguesa de Pneumologia 2003. [DOI: 10.1016/s0873-2159(15)30705-4] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Oliveira A, Moreira S, Mota P, Duarte G, Pestana E, Dias F. C4. Pneumonia adquirida na comunidade (PAC): estudo retrospectivo num hospital central. Revista Portuguesa de Pneumologia 2003. [DOI: 10.1016/s0873-2159(15)30708-x] [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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Salvador MJ, Dias DA, Moreira S, Zucchi OLAD. Analysis of Medicinal Plants and Crude Extracts by Synchrotron Radiation Total Reflection X-Ray Fluorescence. ACTA ACUST UNITED AC 2003. [DOI: 10.1081/tma-120020272] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Cunha SS, Rodrigues LC, Moreira S, Carvalho LC, Barreto ML, Dourado I. Upward trend in the rate of detection of new cases of leprosy in the State of Bahia, Brazil. Int J Lepr Other Mycobact Dis 2001; 69:308-17. [PMID: 12035292] [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] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
BACKGROUND The worldwide fall in the rate of detection of new cases of leprosy has been partly attributed to the introduction of multidrug therapy and other improvements in control programs. However, the rate of detection of new cases has not decreased in Brazil. METHODS An analysis was made of the temporal distribution of 18,872 newly reported leprosy cases in Bahia, Brazil, from 1974 to 1997. Population denominators for the annual detection rate were obtained from population estimates based on the national census. Trends were presented by sex, date of birth, date of diagnosis, date of release, clinical form and by residence in areas which had notified cases in the 5 years prior to the rise in detection rate. RESULTS There was a marked increase in the new case detection rate (NCDR) in the State of Bahia, from 0.19 to 1.43 cases per 10,000 inhabitants during the study period, an increment of nearly 7% to 8% per year. This increase was also observed in people aged 14 years and younger. During this period tuberculoid and indeterminate forms have become predominant among women and younger people. The average age of male cases has shifted toward younger ages. CONCLUSIONS We interpret this pattern to mean that the increase in NCDR reflects a real increase in incidence of leprosy, whether or not accompanied by improved detection.
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Affiliation(s)
- S S Cunha
- Institute de Saúde Coletiva, Universidade Federal da Bahia, Bahia, Brazil.
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Felipe CR, Garcia C, Moreira S, Olsen N, Silva HT, Pestana OM. Choosing the right dose of new immunossuppressive drugs for new populations: importance of pharmacokinetic studies. Transplant Proc 2001; 33:1095-6. [PMID: 11267207 DOI: 10.1016/s0041-1345(00)02432-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- C R Felipe
- Hospital do Rim e Hipertensão, Universidade Federal de São Paulo, São Paulo, Brazil
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Mifsud A, Sim CK, Boettger-Tong H, Moreira S, Lamb DJ, Lipshultz LI, Yong EL. Trinucleotide (CAG) repeat polymorphisms in the androgen receptor gene: molecular markers of risk for male infertility. Fertil Steril 2001; 75:275-81. [PMID: 11172827 DOI: 10.1016/s0015-0282(00)01693-9] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE To determine whether changes in the polymorphic trinucleotide (CAG) tract of the androgen receptor gene are associated with spermatogenic defects in patients with male infertility. DESIGN Case-control study of two ethnic groups. SETTING University referral centers for male infertility at Baylor College of Medicine, Houston, Texas, and National University Hospital, Singapore. PARTICIPANT(S) Two hundred and fifteen patients with male infertility and depressed spermatogenesis and 142 fertile controls. MAIN OUTCOME MEASURE(S) Size of androgen receptor CAG alleles according to fluorescent-labeled polymerase chain reaction and automated analysis using Genescan software (PE Biosystems Asia, Singapore), and statistical examination of its relation to clinical variables. RESULT(S) In U.S. patients, the mean androgen receptor CAG length was significantly longer in infertile patients than in fertile controls (21.95 +/- 0.31 vs. 20.72 +/- 0.52). Logistic regression showed that each unit increase in CAG length was associated with a 20% increase in the odds of being azoospermic. The odds ratio for azoospermia was sevenfold higher for patients with > or =26 CAG repeats than in those with <26 CAG repeats. Although mean CAG length in Singapore patients was longer than in the U.S. samples, long androgen receptor CAG alleles were significantly related to male infertility in both populations. CONCLUSION(S) Long (> or =26) androgen receptor CAG alleles, which are found in up to 25% of azoospermic men, are associated with male infertility and defective spermatogenesis. Conception in these men is possible with assisted reproductive technologies, as many have spermatozoa in their testes.
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Affiliation(s)
- A Mifsud
- Department of Obstetrics and Gynecology, National University Hospital of Singapore, Level 2, Lower Kent Ridge Road, Republic of Singapore
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Gaudin Y, Moreira S, B N Jean J, Blondel D, Flamand A, Tuffereau C. Soluble ectodomain of rabies virus glycoprotein expressed in eukaryotic cells folds in a monomeric conformation that is antigenically distinct from the native state of the complete, membrane-anchored glycoprotein. J Gen Virol 1999; 80 ( Pt 7):1647-1656. [PMID: 10423132 DOI: 10.1099/0022-1317-80-7-1647] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Rabies virus glycoprotein (G) is a trimeric type I transmembrane glycoprotein that mediates both virus receptor recognition and low pH-induced membrane fusion. G can assume three different states: the 'native' state (N) detected at the virus surface, which is responsible for receptor binding, the activated hydrophobic state (A), which interacts with the target membrane as a first step in the fusion process, and the fusion-inactive conformation (I). These three states, which are structurally different, are in a pH-dependent equilibrium. This equilibrium is shifted toward the I state at low pH. This paper includes an investigation of the structure of the ectodomain of the PV strain of rabies virus when it is synthesized as a soluble form (G1-439) lacking the transmembrane and intracytoplasmic domains (residues 440-505). It is shown that, whatever the extracellular pH, G1-439 is secreted as a monomer that has the antigenic characteristics of the I state. This I-like state is not acquired in the acidic compartments of the Golgi but directly in the endoplasmic reticulum. Finally, membrane anchorage by the G transmembrane domain (G1-461) is sufficient for the G ectodomain to be folded into the native N form. These results emphasize the role of the G transmembrane domain in the correct folding of the ectodomain.
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Lopes-Martins RA, Araújo CV, Estato V, Moreira S, Cordeiro RS, Tibiriçá EV. Platelet-activating factor. A possible role in the modulation of the vasomotor tone and blood pressure. Adv Exp Med Biol 1996; 416:223-30. [PMID: 9131152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- R A Lopes-Martins
- Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brasil
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Castro-Faria-Neto HC, Araújo CV, Moreira S, Bozza PT, Thomas G, Barbosa-Filho JM, Cordeiro RS, Tibiriçá EV. Yangambin: a new naturally-occurring platelet-activating factor receptor antagonist: in vivo pharmacological studies. Planta Med 1995; 61:106-112. [PMID: 7753914 DOI: 10.1055/s-2006-958026] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The pharmacological profile of a novel specific platelet-activating factor (PAF) receptor antagonist-yangambin-isolated from the Brazilian plant Ocotea duckei Vattimo (Lauraceae), was investigated in the pentobarbitone-anaesthetized rabbit. The i.v. administration of PAF (0.03-3.0 microgram kg-1) induced marked but reversible hypotensive effects and mild reductions in the heart rate. Both effects are independent of the respiratory conditions imposed on the animals. Moreover, PAF (3.0 microgram kg-1, i.v.) induced a reversible decrease of the circulating levels of platelets and of polymorphonuclear leukocytes. Pretreatment with yangambin (10 and 20 mg kg-1, i.v.) dose-dependently attenuated PAF-induced cardiovascular changes and thrombocytopaenia. Nevertheless, the neutropenic leukopaenia elicited by PAF (3.0 microgram kg-1, i.v.) was not prevented by yangambin whereas the reference PAF antagonists WEB 2086 (2 mg kg-1, i.v.) and SR 27417 (1 mg kg-1, i.v.) significantly inhibited the phenomenon. The hypotensive effects of acetylcholine, histamine, and 5-hydroxytryptamine were not affected by prior administration of yangambin. It is concluded that yangambin is a selective antagonist of the cardiovascular effects of PAF which could be useful in pathological states characterized by abnormal PAF release, such as anaphylactic and septic shocks. Furthermore, yangambin might discriminate a PAF receptor subtype present in the cardiovascular system and platelets from the one existing in polymorphonuclear leukocytes in the rabbit.
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Affiliation(s)
- H C Castro-Faria-Neto
- Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, Brazil
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Lessa I, Cortes E, Menezes G, Lima ME, Santos CM, Jesus AM, Souza CS, Moreira S. [The determination of blood pressure in routine medical practice]. AMB Rev Assoc Med Bras 1984; 30:50-2. [PMID: 6332342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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