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Franulic N, Brito C, Del Pino C, Laso J, Rojas C, Olivieri R, Gaggero N. The use of arthroscopy does not increase the incidence of complications in the management of Schatzker IV-VI tibial plateau fractures. Rev Esp Cir Ortop Traumatol (Engl Ed) 2023; 67:290-296. [PMID: 36720363 DOI: 10.1016/j.recot.2023.01.004] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/27/2022] [Accepted: 01/22/2023] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND AND OBJECTIVE The use of arthroscopy for tibial plateau fractures type I, II and III according to Schatzker classification has increased, yet its employment for tibial plateau fractures Schatzker IV, V and VI is controversial due to the potential risk of compartment syndrome, deep vein thrombosis and infection. We aimed to compare the rate of operative and postoperative complications among patients with these types of tibial plateau fractures treated with and without arthroscopy at the time of definitive reduction and osteosynthesis. METHODS Retrospective cohort study. Patients with diagnosis of tibial plateau fracture Schatzker IV, V or VI who underwent reduction and definitive osteosynthesis with or without the use of arthroscopy were included. The development of compartment syndrome, deep vein thrombosis, and fracture-related infection was evaluated up to 12 months after the definitive surgery. RESULTS Two hundred eighty-eight patients were included: 86 with arthroscopic assistance and 202 without it. The overall complication rate in the group with and without arthroscopic assistance was 18.60% and 26.73%, respectively (P=.141). No statistical association was found between the use of arthroscopic assistance and the development of the analyzed complications. DISCUSSION AND CONCLUSION The use of arthroscopy to support reduction or addressing concomitant intra-articular injuries did not increase the risk of complications in patients with high-energy tibial plateau fractures at 12 months of follow up.
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Affiliation(s)
- N Franulic
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile; Traumatología Equipo Rodilla, Hospital Militar de Santiago, Santiago, Chile.
| | - C Brito
- Traumatología General, Universidad de los Andes, Santiago, Chile
| | - C Del Pino
- Traumatología General, Universidad Andrés Bello, Santiago, Chile
| | - J Laso
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile; Traumatología Equipo Rodilla, Hospital Barros Luco Trudeau, Santiago, Chile
| | - C Rojas
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
| | - R Olivieri
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
| | - N Gaggero
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
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Franulic N, Brito C, Del Pino C, Laso J, Rojas C, Olivieri R, Gaggero N. [Translated article] The use of arthroscopy does not increase the incidence of complications in the management of Schatzker IV-VI tibial plateau fractures. Rev Esp Cir Ortop Traumatol (Engl Ed) 2023; 67:T290-T296. [PMID: 36940845 DOI: 10.1016/j.recot.2023.01.006] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/22/2023] [Indexed: 03/22/2023] Open
Abstract
BACKGROUND AND OBJECTIVE The use of arthroscopy for tibial plateau fractures type I, II and III according to Schatzker classification has increased, yet its employment for tibial plateau fractures Schatzker IV, V and VI is controversial due to the potential risk of compartment syndrome, deep vein thrombosis and infection. We aimed to compare the rate of operative and postoperative complications among patients with these types of tibial plateau fractures treated with and without arthroscopy at the time of definitive reduction and osteosynthesis. METHODS Retrospective cohort study. Patients with diagnosis of tibial plateau fracture Schatzker IV, V or VI who underwent reduction and definitive osteosynthesis with or without the use of arthroscopy were included. The development of compartment syndrome, deep vein thrombosis, and fracture-related infection was evaluated up to 12 months after the definitive surgery. RESULTS Two hundred eighty-eight patients were included: 86 with arthroscopic assistance and 202 without it. The overall complication rate in the group with and without arthroscopic assistance was 18.60% and 26.73%, respectively (p=.141). No statistical association was found between the use of arthroscopic assistance and the development of the analysed complications. DISCUSSION AND CONCLUSION The use of arthroscopy to support reduction or addressing concomitant intra-articular injuries did not increase the risk of complications in patients with high-energy tibial plateau fractures at 12 months of follow up.
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Affiliation(s)
- N Franulic
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile; Traumatología Equipo Rodilla, Hospital Militar de Santiago, Santiago, Chile.
| | - C Brito
- Traumatología General, Universidad de los Andes, Santiago, Chile
| | - C Del Pino
- Traumatología General, Universidad Andrés Bello, Santiago, Chile
| | - J Laso
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile; Traumatología Equipo Rodilla, Hospital Barros Luco Trudeau, Santiago, Chile
| | - C Rojas
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
| | - R Olivieri
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
| | - N Gaggero
- Traumatología Equipo Rodilla, Hospital del Trabajador ACHS, Santiago, Chile
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Brito T, Lima T, Cunha-Oliveira A, Noronha A, Brito C, Farias F, Morais S, Paiva J, Honorato C, Queirós P, Gómez-Cantarino S, Lucena M, Valentim R. Salus Platform: A Digital Health Solution Tool for Managing Syphilis Cases in Brazil-A Comparative Analysis. Int J Environ Res Public Health 2023; 20:5258. [PMID: 37047873 PMCID: PMC10094047 DOI: 10.3390/ijerph20075258] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/11/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
(1) Introduction: Syphilis is a sexually transmitted infection (STI) that constitutes a serious public health problem in Brazil and worldwide; (2) Methods: This was a descriptive and exploratory study that sought to analyze and compare the characteristics of Brazilian health systems with a new platform (Salus) developed by the Laboratory of Technological Innovation in Health in the scope of notification and management of disease data, including syphilis. In addition, this analysis aimed to assess whether Salus fully meets the necessary data management fields and can be indicated as a tool to improve health management in the context of syphilis in Brazil. (3) Results: In this study, the Salus functionalities were demonstrated and compared with the current Brazilian systems by discovering the existing gaps in the evaluated systems. The gaps found may explain the delay in meeting demands, the difficulty of making routine therapeutic follow-ups, in addition to interference with the vital purpose of follow-up in the epidemiological surveillance of diseases. As a result, Salus demonstrates functionalities that surpass all others and meet case management demands in a superior way to the systems currently used in the country. (4) Conclusions: The Brazilian health information systems related to the response to syphilis do not fulfill the purpose for which they were developed. Instead, they contribute to the fragmentation of health data and information, delays in diagnosis, incomplete case management, and loss of data due to inconsistencies and inadequate reporting. In addition, they are systems without interconnection, which do not articulate epidemiological surveillance actions with primary health care. All these factors may be obscuring accurate data on syphilis in Brazil, resulting in high and unnecessary public spending and late care for users of the Unified Health System (SUS).
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Affiliation(s)
- Talita Brito
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Health Sciences Research Unit: Nursing (UICISA: E), Coimbra Nursing School (ESEnfC), 3004-011 Coimbra, Portugal
| | - Thaísa Lima
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Ministry of Health, Esplanada dos Ministérios, Block G, Headquarters Building, Brasília 70058-900, Brazil
| | - Aliete Cunha-Oliveira
- Health Sciences Research Unit: Nursing (UICISA: E), Coimbra Nursing School (ESEnfC), 3004-011 Coimbra, Portugal
- Center for Interdisciplinary Studies of the 20th Century (CEIS-20), University of Coimbra, 3000-456 Coimbra, Portugal
| | - André Noronha
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Department of Pharmacy, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
| | - Cintia Brito
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Department of Physical Education, University of Pernambuco, Recife 52012-570, Brazil
| | - Fernando Farias
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Federal Institute of Sergipe, Aracaju 49680-000, Brazil
| | - Sedir Morais
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
| | - Jailton Paiva
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Federal Institute of Rio Grande do Norte, Natal 59015-000, Brazil
| | - Cintia Honorato
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Hospital of State Servers, Rio de Janeiro 20221-161, Brazil
| | - Paulo Queirós
- Health Sciences Research Unit: Nursing (UICISA: E), Coimbra Nursing School (ESEnfC), 3004-011 Coimbra, Portugal
| | - Sagrario Gómez-Cantarino
- Health Sciences Research Unit: Nursing (UICISA: E), Coimbra Nursing School (ESEnfC), 3004-011 Coimbra, Portugal
- Faculty of Physiotherapy and Nursing, Campus Toledo, University of Castilla-La Mancha, 45071 Toledo, Spain
| | - Márcia Lucena
- Department of Informatics and Applied Mathematics (DIMAP), Federal University of Rio Grande do Norte, Natal 59078-900, Brazil
| | - Ricardo Valentim
- Laboratory of Technological Innovation in Health, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil
- Department of Biomedical Engineering, Federal University of Rio Grande do Norte, Natal 59077-080, Brazil
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Singh SK, Tan QW, Brito C, De León M, De León D. Corrigendum to "Insulin-like growth Factors I and II receptors in the breast cancer disparity" among African-American women [Growth Hormone & IGF Research 20 (2010) 245-254]. Growth Horm IGF Res 2022; 67:101512. [PMID: 36280533 DOI: 10.1016/j.ghir.2022.101512] [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: 11/04/2022]
Affiliation(s)
- S Kalla Singh
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - Q W Tan
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - C Brito
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - M De León
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
| | - D De León
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA.
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Figueira I, Garcia G, Pimpão RC, Terrasso AP, Costa I, Almeida AF, Tavares L, Pais TF, Pinto P, Ventura MR, Filipe A, McDougall GJ, Stewart D, Kim KS, Palmela I, Brites D, Brito MA, Brito C, Santos CN. Correction to: Polyphenols journey through blood-brain barrier towards neuronal protection. Sci Rep 2021; 11:17112. [PMID: 34408218 PMCID: PMC8373959 DOI: 10.1038/s41598-021-96179-w] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- I Figueira
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - G Garcia
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - R C Pimpão
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - A P Terrasso
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - I Costa
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - A F Almeida
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - L Tavares
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - T F Pais
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, 2780-156, Oeiras, Portugal
| | - P Pinto
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Escola Superior Agrária, Instituto Politécnico de Santarém, Qta do Galinheiro, Santarém, Portugal
| | - M R Ventura
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal
| | - A Filipe
- Medical Department, Grupo Tecnimede, 2710-089, Sintra, Portugal
| | - G J McDougall
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, Scotland, UK
| | - D Stewart
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, Scotland, UK.,Engineering and Physical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, Scotland, UK.,NIBIO, Norwegian Institute of Bioeconomy Research, Pb 115, NO-1431, Ås, Norway
| | - K S Kim
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, 600 North Wolfe Street Park 256, Baltimore, MD, 21287, USA
| | - I Palmela
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - D Brites
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal.,Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - M A Brito
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal.,Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - C Brito
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - C N Santos
- Instituto de Tecnologia Quı́mica e Biológica-António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal. .,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal.
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Neto J, da Silva DS, da Silva IV, Thill J, Pochmann D, Brito C, Elsner V. Relationship between levels of physical activity and brain derived neurotrophic factor in peripheral blood of monozygotic twins. Comparative Exercise Physiology 2020. [DOI: 10.3920/cep190061] [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: 11/19/2022]
Abstract
Studies involving monozigotic (MZ) twins are of great importance for the understanding of genetic and environmental influences without the development of individual pathologies and pathways associated with lifestyle. In this context, discordance has recently been suggested in the levels of the brain-derived neurotrophic factor (BDNF) in MZ twins, which may be associated with the practice of physical activity (PA). The objective was to verify the relationship between the peripheral levels of BDNF and PA in MZ twins. This transversal and quantitative study included 11 pairs of MZ twins that answered the International Physical Activity Questionnaire (IPAQ), a brief anamnesis and were submitted to a blood collection (15 ml) for BDNF levels analysis, measured through ELISA kit according to the manufacturer’s instructions. The study was approved by the Ethics Committee of Centro Universitário Metodista IPA (no. 1.746.954). There was no statistically significant relationship between BDNF and PA levels in sedentary and physically active MZ twins (P=0.431). PA practice does not seem to influence BDNF levels in these individuals.
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Affiliation(s)
- J.P. Neto
- Programa de Pós-graduação em Biociências e Reabilitação, Centro Universitário Metodista – IPA, Street Coronel Joaquim Pedro Salgado 80 – Rio Branco, Porto Alegre, RS 90420-060, Brazil
- Curso de Fisioterapia, Centro Universitário Anhanguera, Porto Alegre, RS, Brazil
| | - D. Santos da Silva
- Curso de Fisioterapia, Centro Universitário Metodista – IPA, Porto Alegre, RS, Brazil
| | - I.R. Vital da Silva
- Programa de Pós-graduação em Biociências e Reabilitação, Centro Universitário Metodista – IPA, Street Coronel Joaquim Pedro Salgado 80 – Rio Branco, Porto Alegre, RS 90420-060, Brazil
| | - J. Thill
- Curso de Fisioterapia, Centro Universitário Metodista – IPA, Porto Alegre, RS, Brazil
| | - D. Pochmann
- Programa de Pós-graduação em Biociências e Reabilitação, Centro Universitário Metodista – IPA, Street Coronel Joaquim Pedro Salgado 80 – Rio Branco, Porto Alegre, RS 90420-060, Brazil
| | - C. Brito
- Curso de Fisioterapia, Centro Universitário Metodista – IPA, Porto Alegre, RS, Brazil
| | - V.R. Elsner
- Programa de Pós-graduação em Biociências e Reabilitação, Centro Universitário Metodista – IPA, Street Coronel Joaquim Pedro Salgado 80 – Rio Branco, Porto Alegre, RS 90420-060, Brazil
- Curso de Fisioterapia, Centro Universitário Metodista – IPA, Porto Alegre, RS, Brazil
- Programa de Pós-graduação em Ciências Biológicas: Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Almeida FT, Caldas R, Rodrigues AP, Ferreira O, Brito C. Eosinophilic dermatosis of hematologic malignancy: a case report. Dermatol Online J 2020; 26:13030/qt4k8908jb. [PMID: 32609451] [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] [Received: 05/04/2020] [Accepted: 05/04/2020] [Indexed: 06/11/2023] Open
Abstract
Eosinophilic dermatosis of hematologic malignancy (EDHM) is a dermatosis characterized by tissue eosinophilia that has been previously reported as insect bite-like reaction. It is a rare condition with a wide variety of clinical presentations ranging from papules, nodules, or blisters that simulate arthropod bites, to the formation of plaques of differing sizes. We report a case of eosinophilic dermatosis of hematologic malignancy in a patient with a hematoproliferative disorder.
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Affiliation(s)
- F T Almeida
- Department of Dermatovenereology, Hospital de Braga, Braga.
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Almeida FT, Caldas R, Rodrigues AP, Ferreira O, Brito C. Eosinophilic dermatosis of hematologic malignancy: a case report. Dermatol Online J 2020. [DOI: 10.5070/d3263048032] [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: 11/08/2022] Open
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Brito C, Azevedo A, Esteves S, Martins C, Mafra M, Roque L, Pojo M. P03.13 Evaluation of PIK3CA mutational status in glioma molecular subgroups. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.094] [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: 11/12/2022] Open
Abstract
Abstract
BACKGROUND
Gliomas are the most common and lethal malignant tumors of central nervous system. In 2016, World Health Organization (WHO) classification included IDH mutations and 1p/19q codeletion as diagnostic criteria to define glioma entities. However, new biomarkers for diagnosis, prognosis and response to therapy are needed. In this context, PIK3CA mutations have been described as constitutive mutations, which highlights their relevance in gliomas. Here we clarified the clinical relevance of PIK3CA mutations according to the 2016 WHO classification, the potential impact on diagnosis, prognosis, response to therapy, as well as their correlation with EGFR amplification and PTEN deletion.
MATERIAL AND METHODS
A cohort of 444 adult diffuse glioma samples from Instituto Português de Oncologia Lisboa Francisco Gentil (IPOLFG) was classified according to the 2016 WHO Classification. The mutational status of exon 9 and 20 of PIK3CA was evaluated in molecular subgroups of gliomas by Sanger sequencing. PTEN deletion and EGFR amplification were identified by Fluorescent in situ hybridization (FISH).
RESULTS
PIK3CA mutations showed a higher frequency in the subgroup of gliomas with IDH mutations and 1p/19q codeletion - oligodendrogliomas (10%). In Glioblastoma (GBM) IDH-mutant and IDH-wildtype these oncogenic mutations were observed in 9% and 3% of cases, respectively. Similar results were obtained using The Cancer Genome Atlas (TCGA) data, which was 8% and 2%, respectively. H1047R and E542K were the most frequent mutations identified in the glioma molecular subgroups. Importantly, we found 3 unreported pathogenic variants in exon 20 of PIK3CA (c.3112T>C, c.2988T>C, c.3040C>T) and one polymorphic variant (c.3210A>G). In addition, PIK3CA mutations, PTEN deletion and EGFR amplification were not mutually exclusive alterations in glioma molecular subgroups. For the first time in gliomas, it was identified the rs45455192 polymorphism at a frequency of 16% in astrocytomas IDH-mutant, 24% in oligodendrogliomas and 18% in both molecular subgroups of GBM, although this polymorphism did not have prognostic value. The analysis of PIK3CA mutations in glioma recurrences showed that these mutations are maintained during glioma progression.
CONCLUSION
In two independent cohorts (IPOLFG and TCGA), it was obtained similar frequencies of PIK3CA mutations in GBM molecular subgroups. In addition, these mutations are more relevant in less aggressive gliomas (IDH-mutated and 1p/19q codeleted). These alterations seem to be important in tumor maintenance and progression, which makes this gene a potential therapeutic target. In the future, we will investigate the effect of the in vitro pharmacological inhibition of PIK3CA in GBM mutant cell lines.
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Affiliation(s)
- C Brito
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - A Azevedo
- Serviço de Neurologia do Instituto Português de Oncologia de Lisboa Francisco Gentil, E.P.E., Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
- Faculty of Health Sciences, University of Beira Interior, 6200-506 Covilhã, Portugal, Portugal
| | - S Esteves
- Unidade de Investigação Clínica (UIC), Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal, Portugal
| | - C Martins
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Mafra
- Serviço de Anatomia Patológica do Instituto Português de Oncologia de Lisboa Francisco Gentil E.P.E, Rua Prof. Lima Basto, 1099-023 Lisboa, Portugal
| | - L Roque
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
| | - M Pojo
- Unidade de Investigação em Patobiologia Molecular (UIPM), Lisboa, Portugal
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Brito C, Terrasso A, Simão D, Sá J, Arez F, Silva M, Bayó-Puxan N, Sousa M, Gomes-Alves P, Raimundo N, Kremer E, Alves P. iPSC-derived neurospheroids recapitulate development and pathological signatures of human brain microenvironment. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.1237] [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: 10/28/2022]
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Pinto C, Rebelo S, Harrer N, Sommergruber W, Brito C. PO-296 Identification of novel players of tumour – macrophage crosstalk in lung cancer. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.809] [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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Rebelo S, Pinto C, Martins T, Estrada M, Harrer N, Alves P, Sommergruber W, Brito C. PO-270 3D-3-culture: A tool to unveil macrophage plasticity in the tumour microenvironment. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.784] [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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Abreu S, Mata SD, Silva F, Morgado S, Filipe B, Serpa J, Félix A, Boghaert E, Santo V, Brito C. PO-434 Patient-derived cancer explants preserve tumour architecture and heterogeneity in dynamic culture. ESMO Open 2018. [DOI: 10.1136/esmoopen-2018-eacr25.945] [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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14
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Brito C, Dantas S. 4.11-P3Haitian and African immigrants and Afro-Brazilians in Brazil: encounters, prejudice and mental health promotion. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky048.168] [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: 11/14/2022] Open
Affiliation(s)
- C Brito
- Federal University of São Paulo, São Paulo, Brazil
- USIH - Social Union of Haitian immigrants, Brazil
- MIM - Migrant Mission, Brazil
- ProMigra - Program of Awareness and Protection to the Right of the Migrant of the Faculty of Law of the University of São Paulo (FDUSP), Brazil
| | - S Dantas
- Federal University of São Paulo, São Paulo, Brazil
- IEA - Institute of Advanced Studies of the University of São Paulo, Brasil
- Centre for Research and Intercultural Guidance, Brazil
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15
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Brito C, Pablo L, Sánchez A, Ramírez T, Polo V. Granular Dystrophy Associated with Congenital Cataracts. Eur J Ophthalmol 2018; 6:246-9. [PMID: 8908428 DOI: 10.1177/112067219600600304] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Seven members of the same family suffering from Groenow I granular dystrophy and associated congenital cataracts have been studied. Three patients had corneal dystrophy at various stages and three others had a fetal nuclear congenital cataract. A penetrating keratoplasty button was studied under light and electron microscopies. This association has not been described previously. However we must emphasize that there is no general validity for a correlation between granular dystrophy and congenital cataract.
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Affiliation(s)
- C Brito
- Department of Ophthalmology, Hospital Miguel Servet, Zaragoza, Spain
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16
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Figueira I, Garcia G, Pimpão RC, Terrasso AP, Costa I, Almeida AF, Tavares L, Pais TF, Pinto P, Ventura MR, Filipe A, McDougall GJ, Stewart D, Kim KS, Palmela I, Brites D, Brito MA, Brito C, Santos CN. Polyphenols journey through blood-brain barrier towards neuronal protection. Sci Rep 2017; 7:11456. [PMID: 28904352 PMCID: PMC5597593 DOI: 10.1038/s41598-017-11512-6] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 08/08/2017] [Indexed: 01/03/2023] Open
Abstract
Age-related complications such as neurodegenerative disorders are increasing and remain cureless. The possibility of altering the progression or the development of these multifactorial diseases through diet is an emerging and attractive approach with increasing experimental support. We examined the potential of known bioavailable phenolic sulfates, arising from colonic metabolism of berries, to influence hallmarks of neurodegenerative processes. In silico predictions and in vitro transport studies across blood-brain barrier (BBB) endothelial cells, at circulating concentrations, provided evidence for differential transport, likely related to chemical structure. Moreover, endothelial metabolism of these phenolic sulfates produced a plethora of novel chemical entities with further potential bioactivies. Pre-conditioning with phenolic sulfates improved cellular responses to oxidative, excitotoxicity and inflammatory injuries and this attenuation of neuroinflammation was achieved via modulation of NF-κB pathway. Our results support the hypothesis that these small molecules, derived from dietary (poly)phenols may cross the BBB, reach brain cells, modulate microglia-mediated inflammation and exert neuroprotective effects, with potential for alleviation of neurodegenerative diseases.
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Affiliation(s)
- I Figueira
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - G Garcia
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - R C Pimpão
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - A P Terrasso
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - I Costa
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - A F Almeida
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - L Tavares
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - T F Pais
- Instituto Gulbenkian de Ciência, Rua da Quinta Grande, 6, 2780-156, Oeiras, Portugal
| | - P Pinto
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Escola Superior Agrária, Instituto Politécnico de Santarém, Qta do Galinheiro, Santarém, Portugal
| | - M R Ventura
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal
| | - A Filipe
- Medical Department, Grupo Tecnimede, 2710-089, Sintra, Portugal
| | - G J McDougall
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, Scotland, United Kingdom
| | - D Stewart
- The James Hutton Institute, Invergowrie, Dundee, DD2 5DA, Scotland, United Kingdom.,Engineering and Physical Sciences, Heriot Watt University, Edinburgh, EH14 4AS, Scotland, United Kingdom.,NIBIO, Norwegian Institute of Bioeconomy Research, Pb 115, NO-1431, Ås, Norway
| | - K S Kim
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, 600 North Wolfe Street Park 256, Baltimore, MD21287, USA
| | - I Palmela
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - D Brites
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal.,Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - M A Brito
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal.,Department of Biochemistry and Human Biology, Faculty of Pharmacy, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003, Lisbon, Portugal
| | - C Brito
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal.,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal
| | - C N Santos
- Instituto de Tecnologia Quı́mica e Biológica - António Xavier, Universidade Nova de Lisboa, Av. da República, EAN, 2781-901, Oeiras, Portugal. .,Instituto de Biologia Experimental e Tecnológica, Apartado 12, 2781-901, Oeiras, Portugal.
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17
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Abreu S, Espírito Santo V, Oleksijew A, Oswald E, Estrada M, Rebelo S, Vaidya K, Schuler J, Alves P, Boghaert E, Brito C. The impact of co-culture of NSCLC tumor cells and fibroblasts on drug response. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx361.075] [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: 11/14/2022] Open
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18
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Martinez PA, Jacobina UP, Fernandes RV, Brito C, Penone C, Amado TF, Fonseca CR, Bidau CJ. A comparative study on karyotypic diversification rate in mammals. Heredity (Edinb) 2016; 118:366-373. [PMID: 27804966 DOI: 10.1038/hdy.2016.110] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 09/19/2016] [Accepted: 09/27/2016] [Indexed: 01/23/2023] Open
Abstract
Chromosomal rearrangements have a relevant role in organismic evolution. However, little is known about the mechanisms that lead different phylogenetic clades to have different chromosomal rearrangement rates. Here, we investigate the causes behind the wide karyotypic diversity exhibited by mammals. In particular, we analyzed the role of metabolic, reproductive, biogeographic and genomic characteristics on the rates of macro- and microstructural karyotypic diversification (rKD) using comparative phylogenetic methods. We found evidence that reproductive characteristics such as larger litter size per year and longevity, by allowing a higher number of meioses in absolute time, favor a higher probability of chromosomal change. Furthermore, families with large geographic distributions but containing species with restricted geographic ranges showed a greater probability of fixation of macrostructural chromosomal changes in different geographic areas. Finally, rKD does not evolve by Brownian motion because the mutation rate depends on the concerted evolution of repetitive sequences. The decisive factors of rKD evolution will be natural selection, genetic drift and meiotic drive that will eventually allow or not the fixation of the rearrangements. Our results indicate that mammalian karyotypic diversity is influenced by historical and adaptive mechanisms where reproductive and genomic factors modulate the rate of chromosomal change.
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Affiliation(s)
- P A Martinez
- PIBi Lab-Laboratorio de Pesquisas Integrativas em Biodiversidade, Pós-Graduação em Ecologia e Conservação, Universidade Federal de Sergipe, São Cristovão, Brazil
| | | | - R V Fernandes
- Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - C Brito
- Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - C Penone
- Institute of Plant Science, University of Bern, Bern, Switzerland
| | - T F Amado
- BioMa-Biodiversity and Macroecology Lab, Department of Biology and Geology, Physics and Inorganic Chemistry, Rey Juan Carlos University, Mostoles, Spain
| | - C R Fonseca
- Departamento de Ecologia, Universidade Federal do Rio Grande do Norte, Natal, Brazil
| | - C J Bidau
- Paraná y Los Claveles, Garupá, Argentina
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19
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Brito C, Stavroullakis A, Ferreira A, Li K, Oliveira T, Nogueira-Filho G, Prakki A. Extract of acai-berry inhibits osteoclast differentiation and activity. Arch Oral Biol 2016; 68:29-34. [DOI: 10.1016/j.archoralbio.2016.03.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 07/23/2015] [Accepted: 03/29/2016] [Indexed: 11/28/2022]
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20
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Pinto C, Ribeiro A, Silva G, Oliveira M, Coroadinha A, Peixoto C, Barbas A, Brito C, Paredes J, Alves P. AAV-shRNA vectors as an alternative therapy for human basal-like breast cancer. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61511-3] [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: 11/28/2022]
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21
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Gomes-Alves P, Serra M, Brito C, Ricardo CP, Cunha R, Sousa MF, Sanchez B, Bernad A, Carrondo MJT, Rodriguez-Borlado L, Alves PM. In vitro expansion of human cardiac progenitor cells: exploring 'omics tools for characterization of cell-based allogeneic products. Transl Res 2016; 171:96-110.e1-3. [PMID: 26924043 DOI: 10.1016/j.trsl.2016.02.001] [Citation(s) in RCA: 9] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/27/2016] [Accepted: 02/02/2016] [Indexed: 01/15/2023]
Abstract
Human cardiac stem/progenitor cells (hCPCs) have been shown to be capable to regenerate contractile myocardium. However, because of their relative low abundance in the heart, in vitro expansion of hCPC is mandatory to achieve necessary quantities for allogeneic or autologous cardiac regeneration therapy applications (10(6)-10(9) cells/patient). Up to now, cell number requirements of ongoing phase I/IIa trials have been fulfilled with production in static monolayer cultures. However, this manufacturing process poses critical limitations when moving to the following clinical phases where hundreds of patients will be enrolled. For this, increased process yield is required, while guaranteeing the quality of the cell-based products. In this work, we developed and validated a robust, scalable, and good manufacturing practice (GMP)-compatible bioprocess for the expansion of high-quality hCPC. We applied platforms extensively used by the biopharmaceutical industry, such as microcarrier technology and stirred systems, and assessed culture conditions' impact on hCPC's quality and potency, as required by regulatory agencies. Complementary analytical assays including gene expression microarrays and mass spectrometry-based approaches were explored to compare transcriptome, proteome, surface markers, and secretion profiles of hCPC cultured in static monolayers and in stirred microcarrier-based systems. Our results show that stirred microcarrier-based culture systems enabled achieving more than 3-fold increase in hCPC expansion, when compared with traditional static monolayers, while retaining cell's phenotype and similar "omics" profiles. These findings demonstrate that this change in the production process does not affect cell's identity and quality, with potential to be translated into a transversal production platform for clinical development of stem-cell therapies.
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Affiliation(s)
- P Gomes-Alves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - M Serra
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - C Brito
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - C P Ricardo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - R Cunha
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - M F Sousa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal
| | - B Sanchez
- Coretherapix, Tres Cantos, Madrid, Spain
| | - A Bernad
- Centro Nacional de Biotecnología, Madrid, Spain
| | - M J T Carrondo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Monte da Caparica, Portugal
| | | | - P M Alves
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal; iBET, Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.
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22
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Oswald E, Espírito Santo V, Rudisch A, Brito C, Sommergruber W, Dolznig H, Schüler J. 273 Modelling tumor-stroma crosstalk in vivo by co-implantation of human fibroblasts and human lung cancer cells orthotopically into immuncompromized mice. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30158-7] [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: 11/16/2022]
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23
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Simão D, Pinto C, Fernandes P, Peddie CJ, Piersanti S, Collinson LM, Salinas S, Saggio I, Schiavo G, Kremer EJ, Brito C, Alves PM. Evaluation of helper-dependent canine adenovirus vectors in a 3D human CNS model. Gene Ther 2015; 23:86-94. [PMID: 26181626 DOI: 10.1038/gt.2015.75] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Revised: 06/23/2015] [Accepted: 07/08/2015] [Indexed: 01/24/2023]
Abstract
Gene therapy is a promising approach with enormous potential for treatment of neurodegenerative disorders. Viral vectors derived from canine adenovirus type 2 (CAV-2) present attractive features for gene delivery strategies in the human brain, by preferentially transducing neurons, are capable of efficient axonal transport to afferent brain structures, have a 30-kb cloning capacity and have low innate and induced immunogenicity in preclinical tests. For clinical translation, in-depth preclinical evaluation of efficacy and safety in a human setting is primordial. Stem cell-derived human neural cells have a great potential as complementary tools by bridging the gap between animal models, which often diverge considerably from human phenotype, and clinical trials. Herein, we explore helper-dependent CAV-2 (hd-CAV-2) efficacy and safety for gene delivery in a human stem cell-derived 3D neural in vitro model. Assessment of hd-CAV-2 vector efficacy was performed at different multiplicities of infection, by evaluating transgene expression and impact on cell viability, ultrastructural cellular organization and neuronal gene expression. Under optimized conditions, hd-CAV-2 transduction led to stable long-term transgene expression with minimal toxicity. hd-CAV-2 preferentially transduced neurons, whereas human adenovirus type 5 (HAdV5) showed increased tropism toward glial cells. This work demonstrates, in a physiologically relevant 3D model, that hd-CAV-2 vectors are efficient tools for gene delivery to human neurons, with stable long-term transgene expression and minimal cytotoxicity.
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Affiliation(s)
- D Simão
- iBET-Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
| | - C Pinto
- iBET-Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
| | - P Fernandes
- iBET-Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
| | - C J Peddie
- The Francis Crick Institute, Lincoln's Inn Fields Laboratory, London, UK
| | - S Piersanti
- Dipartimento di Biologia e Biotecnologie 'Charles Darwin', Università di Roma La Sapienza, Rome, Italy
| | - L M Collinson
- The Francis Crick Institute, Lincoln's Inn Fields Laboratory, London, UK
| | - S Salinas
- Institut de Génétique Moléculaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - I Saggio
- Dipartimento di Biologia e Biotecnologie 'Charles Darwin', Università di Roma La Sapienza, Rome, Italy.,Istituto Pasteur Fondazione Cenci Bolognetti, Università di Roma La Sapienza, Rome, Italy.,Istituto di Biologia e Patologia Molecolari del CNR, Università di Roma La Sapienza, Rome, Italy
| | - G Schiavo
- Sobell Department of Motor Neuroscience and Movement Disorders, Institute of Neurology, University College London, London, UK
| | - E J Kremer
- Institut de Génétique Moléculaire de Montpellier, Montpellier, France.,Université Montpellier, Montpellier, France
| | - C Brito
- iBET-Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
| | - P M Alves
- iBET-Instituto de Biologia Experimental e Tecnológica, Oeiras, Portugal.,Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
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24
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Correia C, Brito C, Sampaio A, Dias A, Bacelar E, Gonçalves B, Ferreira H, Moutinho-Pereira J, Rodrigues M. Leguminous Cover Crops Improve the Profitability and the Sustainability of Rainfed Olive (Olea europaea L.) Orchards: From Soil Biology to Physiology of Yield Determination. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.proenv.2015.07.213] [Citation(s) in RCA: 5] [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] [Indexed: 10/23/2022]
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25
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Espírito Santo V, Estrada M, Veloso S, Sousa M, Van der Kuip H, Oren M, Boghaert E, Alves P, Brito C. 350: Recapitulation of non-small-cell lung carcinoma microenvironment in perfusion bioreactor cultures: the impact of hypoxia on tumour–stroma crosstalk. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50311-5] [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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26
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Batista M, Moreno C, Vilar J, Golding M, Brito C, Santana M, Alamo D. Neonatal viability evaluation by Apgar score in puppies delivered by cesarean section in two brachycephalic breeds (English and French bulldog). Anim Reprod Sci 2014; 146:218-26. [PMID: 24703805 DOI: 10.1016/j.anireprosci.2014.03.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [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: 07/06/2013] [Revised: 02/17/2014] [Accepted: 03/12/2014] [Indexed: 11/15/2022]
Abstract
This study tried to define neonatal viability after cesarean section in brachycephalic breeds and the efficacy of an adapted Apgar test to assess newborn survival. Data from 44 cesarean sections and 302 puppies were included. Before surgery (59-61 days after ovulation), an ultrasound evaluation defined the fetal biparietal diameter (BPD). Immediately after the uterine delivery, the pups were evaluated to detect birth defects and then, a modified Apgar score (range: 0-10) was used to define neonatal health at 5min (Apgar 1) and 60min (Apgar 2) after neonatal delivery; puppies were classified into three categories: critical neonates (score: 0-3), moderate viability neonates (score: 4-6) and normal viability neonates (score: 7-10). Mean (±SEM) value of BPD was 30.8±0.1mm and 28.9±0.1mm in English and French Bull-Dog fetus, respectively. The incidence of spontaneous neonatal mortality (4.98%, 14/281) and birth defects (6.95%) were not influenced by the sex; however, congenital anomalies and neonatal mortality were higher (p<0.01) in those litters with a greater number of neonates. In Apgar 1, the percentage of critical neonates, moderate viability neonates and normal viability neonates were 20.5%, 46.3% and 33.1% respectively; sixty minutes after birth, the critical neonates only represented 10.3% of the total puppies. Almost all neonates (238/239) showing moderate or normal viability at Apgar 1, survived for the first 24h after birth. The results of the study showed a direct relationship (p<0.01) between the Apgar score and neonatal viability. Therefore, the routine performance of the Apgar score would appear to be essential in the assessment of the status of brachycephalic breed puppies.
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Affiliation(s)
- M Batista
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain.
| | - C Moreno
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
| | - J Vilar
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
| | - M Golding
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
| | - C Brito
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
| | - M Santana
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
| | - D Alamo
- Unit of Reproduction and Obstetrics, Veterinary Faculty, University of Las Palmas de Gran Canaria, Transmontaña s/n 35413, Arucas, Las Palmas, Spain
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27
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Stavroullakis A, Brito C, Li K, Carrilho M, Pashley D, Prakki A. Cytokine secretion screening of odontoblasts treated with chlorhexidine and epigallocatechin-gallate. Dent Mater 2014. [DOI: 10.1016/j.dental.2014.08.302] [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: 10/24/2022]
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Resende C, Araujo C, Duarte ML, Brito C. Rapidly lethal dermatomyositis associated with cutaneous lymphangitis carcinomatosa. Case Reports 2013; 2013:bcr-2013-010376. [DOI: 10.1136/bcr-2013-010376] [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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Kalla Singh S, Brito C, Tan QW, De León M, De León D. Differential expression and signaling activation of insulin receptor isoforms A and B: A link between breast cancer and diabetes. Growth Factors 2011; 29:278-89. [PMID: 21913804 PMCID: PMC3205219 DOI: 10.3109/08977194.2011.616200] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We showed that when insulin-like growth factor II (IGF-II) is highly expressed in breast tissues and cell lines, the IGF-I receptor signaling pathway is highly activated. Since IGF-II activates the insulin receptor (INSR), we propose that the INSR signaling is also activated in this system. We examined the expression of both INSR isoforms, insulin receptor A (INSR-A) and insulin receptor B (INSR-B), and the downstream signaling pathways in breast cancer (BC) cells and in paired (normal/tumor) breast tissues from 100 patients. Analysis was performed by real-time PCR, Western blot, immunohistochemistry, and phospho-ELISA techniques. Tumor tissues and cell lines from African-American patients expressed higher levels of INSR-A, but lower levels of INSR-B. Accordingly, insulin receptor substrate 1 and focal adhesion kinase activation were significantly increased in these women. We conclude that higher INSR-A and lower INSR-B contribute to higher proliferation and lower metabolic response. Thus, differential expression of INSR isoforms represents a potential biological link between BC and diabetes.
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Affiliation(s)
- S Kalla Singh
- Breast Cancer Laboratory, Center for Health Disparities and Molecular Medicine, Loma Linda University School of Medicine, CA 92350, USA
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Gomes J, Pereira T, Carvalho A, Brito C. Primary cutaneous actinomycosis caused by Actinomyces meyeri as first manifestation of HIV infection. Dermatol Online J 2011; 17:5. [PMID: 22136861] [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] Open
Abstract
Primary cutaneous actinomycosis is very uncommon. We report a patient with cutaneous actinomycosis with multiple lesions without any detectable extra-cutaneous lesions. In our patient the actinomycosis was the presenting manifestation of HIV infection.
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Affiliation(s)
- J Gomes
- Department of Dermatology and Venereology, Hospital de Braga, Portugal
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Gomes J, Pereira T, Carvalho A, Brito C. Primary cutaneous actinomycosis caused by as first manifestation of HIV infection. Dermatol Online J 2011. [DOI: 10.5070/d30n05580m] [Citation(s) in RCA: 4] [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: 11/08/2022] Open
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32
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Richardson AE, Hamilton N, Davis W, Brito C, De León D. Insulin-like growth factor-2 (IGF-2) activates estrogen receptor-α and -β via the IGF-1 and the insulin receptors in breast cancer cells. Growth Factors 2011; 29:82-93. [PMID: 21410323 PMCID: PMC3092021 DOI: 10.3109/08977194.2011.565003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The estrogen receptor (ER) is a primary target for breast cancer (BC) treatment. As BC progresses to estrogen-independent growth, the insulin-like growth factor-1 receptor (IGF-1R) and the ER interact in synergistic cross-talk mechanisms, which result in enhanced activation of both receptors' signaling cascades. Insulin-like growth factor-2 (IGF-2) is critical in BC progression and its actions are mediated by the IGF-1R. Our previous studies showed that IGF-2 regulates survival genes that protect the mitochondria and promote chemoresistance. In this study, we analyzed BC cells by subcellular fractionation, Western-Blot, qRT-PCR, and siRNA analysis. Our results demonstrate that IGF-2 activates ER-α and ER-β, and modulates their translocation to the nucleus, membrane organelles, and the mitochondria. IGF-2 actions are mediated by the IGF-1R and the insulin receptor. This novel mechanism of IGF-2 synergistic cross-talk signaling with ER-α and ER-β can promote estrogen-independent BC progression and provide new therapeutic targets for the treatment of BC patients.
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Affiliation(s)
- A E Richardson
- School of Medicine, Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
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Kalla Singh S, Tan QW, Brito C, De León M, De León D. Insulin-like growth factors I and II receptors in the breast cancer survival disparity among African-American women. Growth Horm IGF Res 2010; 20:245-254. [PMID: 20347606 PMCID: PMC2875325 DOI: 10.1016/j.ghir.2010.03.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2009] [Revised: 02/02/2010] [Accepted: 03/02/2010] [Indexed: 12/14/2022]
Abstract
OBJECTIVE African-American (AA) women with breast cancer are more likely to have advanced disease at diagnosis, higher risk of recurrence and poorer prognosis than Caucasian (CA) women. We have recently shown higher insulin-like growth factor II (IGF-II) expression in paired breast tissue samples from AA women as compared to CA women. IGF-II is a potent mitogen that induces cell proliferation and survival signals through activation of the IGF-I and Insulin receptors (IGF-IR, IR) while IGF-II circulating levels are regulated by cellular uptake through the IGF2 receptor. We hypothesize that differential expression of the IGF1R and IGF2R among AA and CA women potentiates IGF-II mitogenic effects, thus contributing to the health disparity observed between these ethnic groups. DESIGN We examined IGF-IR and IGF2R mRNA, protein expression and IGF1R phosphorylation in paired breast tissue samples from AA and CA women by Real Time-PCR, Western blot analysis, immunohistochemistry and ELISA techniques. RESULTS Our results showed significantly increased expression of IGF1R in AA normal tissues as compared to CA normal tissues. IGF1R expression was similar between AA normal and malignant tissues, while IGF1R, IRS-1 and Shc phosphorylation was significantly higher in AA tumor samples. Significantly higher levels of IGF2R were found in CA tumor samples as compared to AA tumor samples. CONCLUSIONS We conclude that IGF1R and IGF2R differential expression may contribute to the increased risk of malignant transformation in young AA women and to the more aggressive breast cancer phenotype observed among AA breast cancer patients and represent, along with IGF-II, potential therapeutic targets in breast cancer.
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MESH Headings
- Adult
- Black or African American/genetics
- Aged
- Aged, 80 and over
- Breast Neoplasms/genetics
- Breast Neoplasms/mortality
- Carcinoma, Ductal, Breast/ethnology
- Carcinoma, Ductal, Breast/genetics
- Carcinoma, Ductal, Breast/mortality
- Carcinoma, Papillary/ethnology
- Carcinoma, Papillary/genetics
- Carcinoma, Papillary/mortality
- Female
- Gene Expression Regulation, Neoplastic
- Genetic Predisposition to Disease
- Health Status Disparities
- Humans
- Middle Aged
- RNA, Messenger/metabolism
- Receptor, IGF Type 1/genetics
- Receptor, IGF Type 2/genetics
- White People/genetics
- Young Adult
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Affiliation(s)
- S Kalla Singh
- Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, CA 92350, USA
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34
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Kalla Singh S, Tan QW, Brito C, De León M, Garberoglio C, De León D. Differential insulin-like growth factor II (IGF-II) expression: A potential role for breast cancer survival disparity. Growth Horm IGF Res 2010; 20:162-170. [PMID: 20089431 PMCID: PMC2885869 DOI: 10.1016/j.ghir.2009.12.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2009] [Revised: 12/09/2009] [Accepted: 12/10/2009] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Increased risk of cancer and other adult diseases have been associated with perinatal exposure to adverse conditions such as stress and famine. Recently, Insulin-like growth factor II (IGF-II) was identified as the first gene associated with altered expression caused by fetal exposure to poor nutrition. IGF-II regulates fetal development and breast cancer cell survival, in part, by regulating anti-apoptotic proteins through activation of the IGF-I and insulin receptors. African-American (AA) women have a lower overall breast cancer (BC) incidence, however, they present with advanced disease at diagnosis, poorer prognosis and lower survival than Caucasian (CA) women. The reasons for the BC survival disparity are not well understood. We hypothesize that IGF-II plays a role in the survival disparity observed among AA breast cancer patients by stimulating rapid tumor growth, inhibiting apoptosis, and promoting metastasis. DESIGN This study examines IGF-II expression and regulation of the anti-apoptotic proteins Bcl-2, Bcl-X(L), and survivin in Hs578t (ER-), CRL 2335 (ER-), and CRL 2329 (ER+) breast cancer cells and compares with the expression of these proteins in paired breast tissue samples from AA and CA women by qRT-PCR and Western blotting. RESULTS IGF-II expression was significantly higher in AA cell lines and tissue samples when compared to Caucasians. IGF-II siRNA treatment decreased anti-apoptotic protein levels in all cell lines (regardless of ER status). These effects were blocked by the addition of recombinant IGF-II. Of significance, IGF-II expression and regulation of Bcl-X(L) and survivin in cell lines correlated with their expression in paired breast tissues. CONCLUSIONS IGF-II and the anti-apoptotic proteins differential expression among AA and CA patients may contribute to the breast cancer survival disparities observed between these ethnic groups.
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Affiliation(s)
- S Kalla Singh
- Center for Health Disparities and Molecular Medicine, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
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35
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Rocha J, Luz Duarte M, Marques H, Torres F, Tavares P, Silva A, Brito C. Association of adult mastocytosis with M541L in the transmembrane domain of KIT. J Eur Acad Dermatol Venereol 2010; 24:1118-9. [PMID: 20236206 DOI: 10.1111/j.1468-3083.2010.03599.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Abstract
Lentigo maligna (LM) is the in situ phase of lentigo maligna melanoma, which may progress to invasive melanoma if left untreated. It mainly occurs on sun-exposed areas of elderly patients. The lesions can be large and conventional surgery can be difficult, particularly on the face. Recent reports indicate that topical imiquimod 5% cream is effective in the treatment of LM. It may be an alternative when surgery or other classical treatments are not possible in elderly patients. We describe an 80-year-old Caucasian woman with a 10-year history of a histologically verified extensive LM of the face. She was treated with imiquimod 5% cream once daily. After four months it showed complete clinical response. One year after the treatment the patient was still free from recurrence.
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Affiliation(s)
- F Ventura
- Department of Dermatology and Venereology, Hospital de São Marcos, Braga, Portugal
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38
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Escrevente C, Machado E, Brito C, Reis CA, Stoeck A, Runz S, Marmé A, Altevogt P, Costa J. Different expression levels of alpha3/4 fucosyltransferases and Lewis determinants in ovarian carcinoma tissues and cell lines. Int J Oncol 2006; 29:557-66. [PMID: 16865271] [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: 05/11/2023] Open
Abstract
Ovarian carcinoma is the leading cause of death from gynecological cancers in many countries. Fucosylated glycoconjugates have been associated with various carcinomas. In the present study, we have characterized the expression of alpha3/4 fucosyltransferases transcripts and their products, the Lewis carbohydrate determinants, and their in vitro specificity towards synthetic acceptors using ovarian carcinoma cell lines OVM, m130, GG and SKOV3. We found different expression patterns: GG cells expressed mostly Lewisx (Lex), Lewisy (Ley), sLea and Leb, and m130 cells expressed mostly Lex and Ley. The detection was on the plasma membrane and in intracellular vesicles. OVM and SKOV3 cells had very low amounts of staining. From RT-PCR studies, enzyme specificity of cellular extracts towards a panel of synthetic carbohydrate acceptors and Western blot analysis we concluded that Lea, sLea and Leb were synthesised by FUT3, whereas Lex and Ley were synthesized by FUT4 and FUT9 in both cell lines. The GG and m130 cell lines are adequate models to investigate the role of Lex, Ley, sLea and Leb in ovarian carcinoma development.
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MESH Headings
- Adenocarcinoma, Mucinous/genetics
- Adenocarcinoma, Mucinous/metabolism
- Adenocarcinoma, Mucinous/pathology
- Blotting, Western
- Carcinoma, Papillary/genetics
- Carcinoma, Papillary/metabolism
- Carcinoma, Papillary/pathology
- Cystadenocarcinoma, Serous/genetics
- Cystadenocarcinoma, Serous/metabolism
- Cystadenocarcinoma, Serous/pathology
- Female
- Fucose/metabolism
- Fucosyltransferases/genetics
- Fucosyltransferases/metabolism
- Gene Expression Regulation, Neoplastic
- Humans
- Lectins/metabolism
- Lewis Blood Group Antigens/genetics
- Lewis Blood Group Antigens/metabolism
- Microscopy, Fluorescence
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/metabolism
- Ovarian Neoplasms/pathology
- Reverse Transcriptase Polymerase Chain Reaction
- Tumor Cells, Cultured
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Affiliation(s)
- C Escrevente
- Instituto de Tecnologia Química e Biológica, 2781-901 Oeiras, Portugal
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39
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Escrevente C, Machado E, Brito C, Reis C, Stoeck A, Runz S, Marmé A, Altevogt P, Costa J. Different expression levels of α3/4 fucosyltransferases and Lewis determinants in ovarian carcinoma tissues and cell lines. Int J Oncol 2006. [DOI: 10.3892/ijo.29.3.557] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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40
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Lourenco P, Brito C, Backeljau T, Thierry D, Ventura MA. Molecular systematics of the Chrysoperla carnea group (Neuroptera: Chrysopidae) in Europe. J ZOOL SYST EVOL RES 2006. [DOI: 10.1111/j.1439-0469.2006.00352.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [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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41
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Barth-Jones DC, Cheng H, Kang LY, Kenya PR, Odera D, Mosqueira NR, Mendoza W, Portela MC, Brito C, Tangcharoensathien V, Akaleephan C, Supantamart S, Patcharanarumol W, de Macedo Brigido LF, Fonseca MGP, Sanchez M, Chang ML, Osmanov S, Avrett S, Esparza J, Griffiths U. Cost effectiveness and delivery study for future HIV vaccines. AIDS 2005; 19:w1-6. [PMID: 16103763 DOI: 10.1097/01.aids.0000181014.08127.a7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Research teams from five countries, Brazil, China, Kenya, Peru and Thailand, have initiated a policy-maker survey on vaccine delivery, cost studies for future HIV vaccination programmes, and associated simulation modeling exercises analysing the relative cost-effectiveness of potential HIV vaccination strategies. The survey assesses challenges and opportunities for future country-level HIV vaccination strategies, providing data on the vaccine characteristics (e.g. vaccine efficacies for susceptibility, infectiousness and disease progression) and vaccination programme strategies to be considered in the cost-effectiveness modeling analyses. The study will provide decision-makers with modeling data on vaccination policy considerations that will assist in developing country-level capacities for future HIV vaccine policy adoption and effective delivery systems, and will help delineate the long-term financial requirements for sustainable HIV vaccination programmes. The WHO-UNAIDS HIV Vaccine Initiative and the collaborating researchers welcome comments or questions from policy makers, health professionals and other stakeholders in the public and private sectors about this effort to help advance policy and capacity related to future potential HIV vaccines.
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Affiliation(s)
- D C Barth-Jones
- Center for Healthcare Effectiveness Research, Wayne State University School of Medicine, Detroit, USA
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42
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Sousa VL, Brito C, Costa J. Deletion of the cytoplasmic domain of human α3/4 fucosyltransferase III causes the shift of the enzyme to early Golgi compartments. Biochim Biophys Acta Gen Subj 2004; 1675:95-104. [PMID: 15535972 DOI: 10.1016/j.bbagen.2004.08.015] [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] [Received: 05/25/2004] [Revised: 07/26/2004] [Accepted: 08/20/2004] [Indexed: 11/17/2022]
Abstract
The transmembrane domain (TM) and flanking regions of glycosyltransferases (GTs) have been implicated in the localization of these proteins in the Golgi apparatus (GA). alpha3/4 Fucosyltransferase III (FT3wt) (EC 2.4.1.65) is localized in the trans-Golgi and trans-Golgi network (TGN) of baby hamster kidney (BHK) cells and synthesizes Lewis determinants associated with cell adhesion events. We have evaluated the effect of removing the cytosolic domain on the localization of the enzyme and its capacity for synthesizing the Lewis A (Le A) determinant. The mutant where the cytoplasmic domain (Asp-2 to Trp-13) of FT3wt has been deleted (FT3dc) was localized in the Golgi but it was shifted to earlier compartments than FT3wt. The mutant was not detected on the plasma membrane (PM) and glycosylation analysis indicated that FT3dc was transported beyond the endoplasmic reticulum (ER) since complex type glycosylation was observed. Cells expressing FT3dc showed a significantly lower efficiency to synthesize Le A when compared with cells expressing FT3wt, in vivo. This reduction was not due to lower specific activity because both enzyme forms had a similar specific activity in vitro. Therefore, removal of FT3 cytosolic tail caused a shift in enzyme distribution to earlier Golgi compartments concomitant to the decrease of its biosynthetic capacity.
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Affiliation(s)
- V L Sousa
- Instituto de Tecnologia Química e Biológica, Avenida da República, Apartado 127, 2781-901 Oeiras, Portugal
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Molina LH, Casanova M, Gonzalez LA, Pinto M, Carrasco E, Brito C. Identification of the genetic variants of kappa-casein in milk by isoelectric focusing electrophoresis. INT J DAIRY TECHNOL 2003. [DOI: 10.1046/j.1471-0307.2003.00102.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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44
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Tiscornia AC, Cayota A, Landoni AI, Brito C, Oppezzo P, Vuillier F, Robello C, Dighiero G, Gabús R, Pritsch O. Post-transcriptional regulation of inducible nitric oxide synthase in chronic lymphocytic leukemia B cells in pro- and antiapoptotic culture conditions. Leukemia 2003; 18:48-56. [PMID: 14574328 DOI: 10.1038/sj.leu.2403169] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [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: 01/25/2023]
Abstract
Functional inducible NOS (iNOS) may be involved in the prolonged lifespan of chronic lymphocytic leukemia cells (B-CLL), although the exact mechanisms implicated remain elusive as yet. In this work, we have examined iNOS expression in normal B lymphocytes and B-CLL cells in pro- and antiapoptotic conditions. Our results demonstrate: (1) The existence of a new splice variant characterized by a complete deletion of exon 14 (iNOS 13-16(14del)), which was preferentially detected in normal B lymphocytes and may represent an isoform that could play a role in the regulation of enzyme activity. (2) The existence of another alternatively spliced iNOS mRNA transcript involving a partial deletion of the flavodoxin region (iNOS 13-16(neg)) was correlated to a decreased B-CLL cell viability. The 9-beta-D-arabinofuranosyl-2-fluoradenine or fludarabine (F-ara) treatment induced iNOS 13-16(neg) transcript variants, whereas IL-4 enhanced both the transcription of variants, including these exons (iNOS 13-16(pos)), and the expression of a 122 kDa iNOS protein. These results suggest that in B-CLL, a regulation process involving nitric oxide (.- NO) levels could occur by a post-transcriptional mechanism mediated by soluble factors. Our results also provide an insight into a new complementary proapoptotic action of F-ara in B-CLL by the induction of particular iNOS splice variants, leading to the activation of a caspase-3-dependent apoptotic pathway.
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MESH Headings
- Aged
- Aged, 80 and over
- Alternative Splicing
- Antineoplastic Agents/pharmacology
- Apoptosis/physiology
- B-Lymphocytes/enzymology
- Base Sequence
- Caspase 3
- Caspases/metabolism
- DNA (Cytosine-5-)-Methyltransferases/antagonists & inhibitors
- Female
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Leukemic
- Humans
- Interleukin-4/pharmacology
- Isoenzymes
- Leukemia, Lymphocytic, Chronic, B-Cell/enzymology
- Male
- Middle Aged
- Molecular Sequence Data
- Nitric Oxide/physiology
- Nitric Oxide Synthase/genetics
- Nitric Oxide Synthase Type II
- RNA Processing, Post-Transcriptional
- RNA, Messenger/metabolism
- Sequence Deletion
- Sequence Homology, Nucleic Acid
- Signal Transduction
- Transcription, Genetic
- Vidarabine/analogs & derivatives
- Vidarabine/pharmacology
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Affiliation(s)
- A C Tiscornia
- Departamento de Bioquímica, de la Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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45
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Brito C, Niklitschek L, Molina LH, Molina I. Evaluation of mathematical equations to predict the theoretical yield of Chilean Gouda cheese. INT J DAIRY TECHNOL 2002. [DOI: 10.1046/j.1364-727x.2001.00035.x] [Citation(s) in RCA: 6] [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: 11/20/2022]
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46
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Brito C, Naviliat M, Tiscornia AC, Vuillier F, Gualco G, Dighiero G, Radi R, Cayota AM. Peroxynitrite inhibits T lymphocyte activation and proliferation by promoting impairment of tyrosine phosphorylation and peroxynitrite-driven apoptotic death. J Immunol 1999; 162:3356-66. [PMID: 10092790] [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: 02/11/2023]
Abstract
Peroxynitrite (ONOO-) is a potent oxidizing and nitrating agent produced by the reaction of nitric oxide with superoxide. It readily nitrates phenolic compounds such as tyrosine residues in proteins, and it has been demonstrated that nitration of tyrosine residues in proteins inhibits their phosphorylation. During immune responses, tyrosine phosphorylation of key substrates by protein tyrosine kinases is the earliest of the intracellular signaling pathways following activation through the TCR complex. This work was aimed to evaluate the effects of ONOO- on lymphocyte tyrosine phosphorylation, proliferation, and survival. Additionally, we studied the generation of nitrating species in vivo and in vitro during immune activation. Our results demonstrate that ONOO-, through nitration of tyrosine residues, is able to inhibit activation-induced protein tyrosine phosphorylation in purified lymphocytes and prime them to undergo apoptotic cell death after PHA- or CD3-mediated activation but not upon phorbol ester-mediated stimulation. We also provide evidence indicating that peroxynitrite is produced during in vitro immune activation, mainly by cells of the monocyte/macrophage lineage. Furthermore, immunohistochemical studies demonstrate the in vivo generation of nitrating species in human lymph nodes undergoing mild to strong immune activation. Our results point to a physiological role for ONOO- as a down-modulator of immune responses and also as key mediator in cellular and tissue injury associated with chronic activation of the immune system.
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Affiliation(s)
- C Brito
- Department of Biochemistry, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
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47
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Wessel HF, Herrmann B, Dupret A, Moniz F, Brito C, Bergström S. Genital infections among antenatal care attendees in Cape Verde. Afr J Reprod Health 1998; 2:32-40. [PMID: 10214427] [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: 02/12/2023]
Abstract
In a cross-sectional study, 350 pregnant Capeverdian women were examined to assess the prevalence of Chlamydia trachomatis infection (CT), Neisseria gonorrhoeae infection (NG) and Bacterial vaginosis (BV). Among various analytic methods used, the polymerase chain reaction PCR (for NG, CT) yielded a higher detection rate than did direct microscopy or culture (NG), or direct immuno-fluorescence (CT). Since the PCR analytic of air-dried specimens is not hampered by harsh storage and transport conditions, it could serve to validate other detection methods where laboratory facilities are suboptimal. Among sociodemographic risk factors young age, and currently living alone, were significantly associated with infection.
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Affiliation(s)
- H F Wessel
- Dept. Obstetrics & Gynaecology, University Hospital, Uppsala, Sweden
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48
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Wall M, Johnson CA, Kutzko KE, Nguyen R, Brito C, Keltner JL. Long- and short-term variability of automated perimetry results in patients with optic neuritis and healthy subjects. Arch Ophthalmol 1998; 116:53-61. [PMID: 9445208 DOI: 10.1001/archopht.116.1.53] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To measure the short- and long-term variability of automated perimetry in patients with optic neuritis and normal subjects. DESIGN Prospective case-control design of patients with recovered optic neuritis with intraday and interday repetitions to obtain robust variability measurements. Entry criteria included a corrected pattern SD that was worse than the normal 5% probability level and a mean deviation worse than -3 dB but better than -20 dB. Five Humphrey 30-2 full threshold tests were administered during a 7-hour period (1 test every 2 hours) on the same day and at the same periods on 5 separate days. SUBJECTS Seventeen patients with recovered optic neuritis and 10 healthy subjects of similar age. MAIN OUTCOME MEASURES Short-term variability and long-term variability for global visual field data. RESULTS Patients with optic neuritis demonstrated variations in visual field sensitivity that were outside the entire range of variability for normal controls. These variations occurred for multiple tests performed on the same day at specific times and for tests performed at specific times on different days. There were no consistent patterns of sensitivity changes that could be attributed to time of day. The most dramatic fluctuations occurred in a patient whose visual fields varied from normal to a hemianopic defect from one week to another and from a partial quadrant loss to a hemianopic defect at different times on the same day. Seven of the patients with optic neuritis also demonstrated intermittent vertical step defects. CONCLUSIONS Patients with resolved optic neuritis can have large variations in visual field results on different days and at different times on the same day. The variations affect both the severity and the pattern of visual field loss and do not appear to be consistent across patients. These data indicate that care must be taken when automated visual field results in patients with optic neuritis are interpreted. Distinguishing systematic changes in sensitivity from variability requires more than a comparison of the current visual field with the most recent previous visual field.
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Affiliation(s)
- M Wall
- Department of Neurology, Veterans Affairs Hospital and University of Iowa College of Medicine, Iowa City 52242-1053, USA.
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Villuendas MC, Gorricho J, Remacha MA, Sánchez A, Brito C. [Corneal crystalline image in patient with keratoplasty]. Enferm Infecc Microbiol Clin 1996; 14:565-6. [PMID: 9035717] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- M C Villuendas
- Servicio de Microbiología, Hospital Miguel Servet, Zaragoza
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Figueredo-Silva J, Jungmann P, Norões J, Piessens WF, Coutinho A, Brito C, Rocha A, Dreyer G. Histological evidence for adulticidal effect of low doses of diethylcarbamazine in bancroftian filariasis. Trans R Soc Trop Med Hyg 1996; 90:192-4. [PMID: 8761588 DOI: 10.1016/s0035-9203(96)90138-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [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: 02/02/2023] Open
Abstract
The ability of diethylcarbamazine (DEC) to kill adult Wuchereria bancrofti worms was evaluated by examining lymphatic nodules formed after treatment with 4 different treatment schedules of 193 males living in the endemic area of Greater Recife, Brazil. Lymphatic nodules appeared in the spermatic cord or upper extremities in 43 of 138 microfilaraemic individuals, in 3 of 30 amicrofilaraemic patients with filarial disease manifestations, and in 1 of 25 asymptomatic amicrofilaraemic residents of the endemic area treated with DEC. Fourteen of these nodules were surgically removed 10-150 d after the start of treatment. Regardless of the DEC dosage and schedule used, all nodules contained damaged and degenerating adult worms. An exuberant granulomatous process with large numbers of eosinophils and progressive fibrosis gradually developed around the dead parasites. The mechanism(s) by which DEC killed adult W. bancrofti could not be determined.
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Affiliation(s)
- J Figueredo-Silva
- Laboratorio de Imunopatologia Keiso Asami, Universidade Federal de Pernambuco, Brazil
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