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Ferreira MB, Kobayashi M, Costa RQ, Fonseca T, Brandão M, Oliveira JC, Marinho A, Cyrne Carvalho H, Rodrigues P, Zannad F, Rossignol P, Barros AS, Ferreira JP. Unsupervised clustering to differentiate rheumatoid arthritis patients based on proteomic signatures. Scand J Rheumatol 2023; 52:619-626. [PMID: 37083270 DOI: 10.1080/03009742.2023.2196781] [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] [Received: 11/11/2022] [Accepted: 03/27/2023] [Indexed: 04/22/2023]
Abstract
OBJECTIVE Patients with rheumatoid arthritis (RA) have different presentations and prognoses. Cluster analysis based on proteomic signatures creates independent phenogroups of patients with different pathophysiological backgrounds. We aimed to identify distinct pathophysiological clusters of RA patients based on circulating proteomic biomarkers. METHOD This was a cohort study including 399 RA patients. Clustering was performed on 94 circulating proteins (92 CVDII Olink®, high-sensitivity troponin T, and C-reactive protein). Unsupervised clustering was performed using a partitioning cluster algorithm. RESULTS The clustering algorithm identified two distinct clusters: cluster 1 (n = 223) and cluster 2 (n = 176). Compared with cluster 1, cluster 2 included older patients with a higher burden of comorbidities (cardiovascular and RA related), more erosive and longer RA duration, more dyspnoea and fatigue, walking a shorter distance in the Six-Minute Walk Test, with more severe diastolic dysfunction, and a 4.5-fold higher risk of death or hospitalization for cardiovascular reasons. Tumour necrosis factor (TNF) receptor superfamily-related pathways were mainly responsible for the model's discriminative ability. CONCLUSION Using unsupervised cluster analysis based on proteomic phenotypes, we identified two clusters of RA patients with distinct biomarkers profiles, clinical characteristics, and different outcomes that could reflect different pathophysiological backgrounds. TNF receptor superfamily-related proteins may be used to distinguish subgroups.
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Affiliation(s)
- M B Ferreira
- UMIB - Unidade Multidisciplinar de Investigação Biomédica, ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- Internal Medicine Department, Hospital da Luz Arrábida, Porto, Portugal
| | - M Kobayashi
- Université de Lorraine, INSERM, Centre d'Investigations Cliniques Plurithématique 1433, Inserm U1116, CHRU de Nancy and F-CRIN INI-CRCT, Nancy, France
| | - R Q Costa
- Internal Medicine Department, Centro Hospitalar de Entre o Douro e Vouga, Aveiro, Portugal
| | - T Fonseca
- Internal Medicine Department, Centro Hospitalar Universitário do Porto, Porto, Portugal
- Unidade de Imunologia Clínica, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - M Brandão
- Unidade de Imunologia Clínica, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - J C Oliveira
- Clinical Chemistry Service, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - A Marinho
- UMIB - Unidade Multidisciplinar de Investigação Biomédica, ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- Unidade de Imunologia Clínica, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - H Cyrne Carvalho
- UMIB - Unidade Multidisciplinar de Investigação Biomédica, ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- Cardiology Department, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - P Rodrigues
- Cardiology Department, Centro Hospitalar Universitário do Porto, Porto, Portugal
| | - F Zannad
- Université de Lorraine, INSERM, Centre d'Investigations Cliniques Plurithématique 1433, Inserm U1116, CHRU de Nancy and F-CRIN INI-CRCT, Nancy, France
| | - P Rossignol
- Université de Lorraine, INSERM, Centre d'Investigations Cliniques Plurithématique 1433, Inserm U1116, CHRU de Nancy and F-CRIN INI-CRCT, Nancy, France
| | - A S Barros
- UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Porto, Portugal
- Heart Failure Clinic, Centro Hospitalar de Vila Nova de Gaia/Espinho, Portugal
| | - J P Ferreira
- Université de Lorraine, INSERM, Centre d'Investigations Cliniques Plurithématique 1433, Inserm U1116, CHRU de Nancy and F-CRIN INI-CRCT, Nancy, France
- UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Porto, Portugal
- Heart Failure Clinic, Centro Hospitalar de Vila Nova de Gaia/Espinho, Portugal
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Cabral JMC, Oliveira JC, Ramos LHA, Piazera FZ, Vasconcelos RS. UM RARO CASO DE MUDANÇA DE LINHAGEM DE LEUCEMIA MIELOIDE AGUDA PARA LEUCEMIA DE LINHAGEM AMBIGUA B/MIELOIDE. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.325] [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: 11/07/2022] Open
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Ramos LHA, Cabral JMC, Serejo AMD, Junior CAR, Oliveira JC. LINFOMA HEPATOESPLÊNICO DE CÉLULAS T GAMMA-DELTA: UM DESAFIO AOS HEMATOLOGISTAS – RELATO DE DOIS CASOS. Hematol Transfus Cell Ther 2022. [DOI: 10.1016/j.htct.2022.09.203] [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: 11/07/2022] Open
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Lacerda MP, Jr SJ, Oliveira JC, Macedo GS, Tomazelli AP, Dalloglio AC, Gastal GR, Boettcher IS, Tavares FS. LINFOMA DE HODGKIN CLÁSSICO RECÉM-DIAGNOSTICADO NO CONTEXTO DE DESABASTECIMENTO DE BLEOMICINA: TRATAMENTO COM DOXORRUBICINA, ETOPOSÍDEO, VIMBLASTINA E DACARBAZINA (AEVD). Hematol Transfus Cell Ther 2021. [DOI: 10.1016/j.htct.2021.10.097] [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] Open
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Vasconcelos LASD, Oliveira JC, Silva Junior RCAD, Justiniano SCB, Souza ÉDS, Magalhães LKC, Silveira H, Silva GAVD, Guerra JADO, Guerra MDGVB. Trypanosoma cruzi discrete typing unit TcIV implicated in a case of acute Chagas disease in a domiciliated dog in the western Amazon. Rev Soc Bras Med Trop 2021; 54:e0873-2020. [PMID: 33759934 PMCID: PMC8008907 DOI: 10.1590/0037-8682-0873-2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 12/23/2020] [Accepted: 02/10/2021] [Indexed: 11/21/2022] Open
Abstract
Chagas disease is caused by the protozoan Trypanosoma cruzi. Seven lineages have been identified based on different molecular markers, namely TcI, TcII, TcIII, TcIV, TcV, TcVI, and TcBat. Dogs play the role of epidemiological sentinels being domestic reservoirs of T. cruzi. The aim of the current study was to report the first case of CD in a domestic dog in Manaus, Amazonas, Brazil, infected with T. cruzi DTU TcIV. We hope our report encourages veterinarians and surveillance professionals to a take a deeper look at T. cruzi infection in domestic animals.
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Affiliation(s)
| | - Josué Costa Oliveira
- Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Centro de Entomologia, Manaus, AM, Brasil
| | | | | | - Éder Dos Santos Souza
- Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Centro de Entomologia, Manaus, AM, Brasil
| | | | - Henrique Silveira
- Universidade Nova de Lisboa, Instituto de Higiene e Medicina Tropical, Lisboa, Portugal
| | | | | | - Maria das Graças Vale Barbosa Guerra
- Fundação de Medicina Tropical Doutor Heitor Vieira Dourado, Centro de Entomologia, Manaus, AM, Brasil.,Universidade do Estado do Amazonas, Programa de Pós-graduação em Medicina Tropical, Manaus, AM, Brasil
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Oliveira JC, Sales JF, Rubio-Neto A, Silva CF, Soares MA, Silva FG. Biological control in the germination of seeds from two species native of the Cerrado region. BRAZ J BIOL 2020; 81:105-113. [PMID: 32159616 DOI: 10.1590/1519-6984.222279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 09/20/2019] [Indexed: 11/22/2022] Open
Abstract
Microorganisms have been efficiently used for the biological control of phytopathogens through the production of antimicrobial substances. However, the objectives of this work were: to study the germination of Butia purpurascens Glassman and Butia archeri Glassman seeds in different substrates, to select and identify the endophytic and rhizospheric bacterial isolates of B. purpurascens and B. archeri, and to perform antibiosis tests based on the isolated microorganisms of these tree species. No difference was found between the cultivation substrates for the percentages of germination, hard seeds, and fungal contamination in the B. purpurascens seeds. The Bacillus subtilis isolated showed the best capacity for suppressing the growth of the two deteriorative fungi tested in B. purpurascens seeds. No difference was found for inhibition of the growth of Aspergillus niger fungus (deteriorative fungus of B. archeri seeds) between the microorganisms with Bacillus sp. and Brevibacillus brevis compared to the control. In the microbiolization of B. purpurascens and B. archeri seeds performed with microbiological solutions produced from the endophytic and rhizospheric strains of Bacillus sp., no differences were observed in the percentages of germination and contamination by fungi. For B. archeri seeds, there was contamination by fungi and bacteria after one day of cultivation, primarily in the regions with lesions caused by the extraction and scarification process.
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Affiliation(s)
- J C Oliveira
- Laboratório de Sementes, Instituto Federal Goiano - IF Goiano, Campus Rio Verde, Av. Sul Goiana, Km 01, Zona Rural, CEP 75900-000, Rio Verde, GO, Brasil
| | - J F Sales
- Laboratório de Sementes, Instituto Federal Goiano - IF Goiano, Campus Rio Verde, Av. Sul Goiana, Km 01, Zona Rural, CEP 75900-000, Rio Verde, GO, Brasil
| | - A Rubio-Neto
- Laboratório de Cultura de Tecidos Vegetal, Instituto Federal Goiano - IF Goiano, Campus Rio Verde, Av. Sul Goiana, Km 01, Zona Rural, CEP 75900-000, Rio Verde, GO, Brasil
| | - C F Silva
- Laboratório de Microbiologia Agrícola, Instituto Federal Goiano - IF Goiano, Campus Rio Verde, Av. Sul Goiana, Km 01, Zona Rural, CEP 75900-000, Rio Verde, GO, Brasil
| | - M A Soares
- Instituto de Biociências, Universidade Federal de Mato Grosso - UFMT, Av. Fernando Corrêa da Costa, 2367, Boa Esperança, CEP 78060-900, Cuiabá, MT, Brasil
| | - F G Silva
- Laboratório de Cultura de Tecidos Vegetal, Instituto Federal Goiano - IF Goiano, Campus Rio Verde, Av. Sul Goiana, Km 01, Zona Rural, CEP 75900-000, Rio Verde, GO, Brasil
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Lima RB, Jeunon-Sousa MAJ, Jeunon T, Oliveira JC, Oliveira MME, Zancopé-Oliveira RM, Moraes ACS. Sporotrichosis masquerading as pyoderma gangrenosum. J Eur Acad Dermatol Venereol 2017. [PMID: 28627095 DOI: 10.1111/jdv.14421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- R B Lima
- Universidade Federal do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - T Jeunon
- Laboratório Investigação em Dermatologia, Rio de Janeiro, Brazil
| | - J C Oliveira
- Universidade Federal Fluminense, Niteroi, Brazil
| | - M M E Oliveira
- Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - R M Zancopé-Oliveira
- Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Azêvedo HSFS, Sousa ACB, Martins K, Oliveira JC, Yomura RBT, Silva LM, Valls JFM, Assis GML, Campos T. Genetic diversity of the forage peanut in the Jequitinhonha, São Francisco, and Paranã River valleys of Brazil. Genet Mol Res 2016; 15:gmr8601. [PMID: 27706713 DOI: 10.4238/gmr.15038601] [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: 11/03/2022]
Abstract
Arachis pintoi and A. repens are legumes with a high forage value that are used to feed ruminants in consortium systems. Not only do they increase the persistence and quality of pastures, they are also used for ornamental and green cover. The objective of this study was to analyze microsatellite markers in order to access the genetic diversity of 65 forage peanut germplasm accessions in the section Caulorrhizae of the genus Arachis in the Jequitinhonha, São Francisco and Paranã River valleys of Brazil. Fifty-seven accessions of A. pintoi and eight of A. repens were analyzed using 17 microsatellites, and the observed heterozygosity (HO), expected heterozygosity (HE), number of alleles per locus, discriminatory power, and polymorphism information content were all estimated. Ten loci (58.8%) were polymorphic, and 125 alleles were found in total. The HE ranged from 0.30 to 0.94, and HO values ranged from 0.03 to 0.88. By using Bayesian analysis, the accessions were genetically differentiated into three gene pools. Neither the unweighted pair group method with arithmetic mean nor a neighbor-joining analysis clustered samples into species, origin, or collection area. These results reveal a very weak genetic structure that does not form defined clusters, and that there is a high degree of similarity between the two species.
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Affiliation(s)
- H S F S Azêvedo
- Programa de Pós-Graduação em Biotecnologia e Recursos Genéticos da Rede Bionorte, Embrapa Rondônia, Porto Velho, RO, Brasil
| | - A C B Sousa
- Universidade Federal da Paraíba, João Pessoa, PB, Brasil
| | - K Martins
- Universidade Federal de São Carlos, Sorocaba, SP, Brasil
| | - J C Oliveira
- Universidade Federal do Acre, Rio Branco, AC, Brasil
| | | | - L M Silva
- Embrapa Acre, Rio Branco, AC, Brasil
| | - J F M Valls
- Embrapa Recursos Genéticos e Biotecnologia, Parque Estação Biológica, Brasília, DF, Brasil
| | | | - T Campos
- Embrapa Acre, Rio Branco, AC, Brasil
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Rocha GAF, Alves DP, Oliveira JC, Brommonschenke SH. Identification and mapping of resistance genes to Phakopsora pachyrhizi in soybean (Glycine max L.) accession PI 594767-A. Genet Mol Res 2016; 15:gmr8475. [PMID: 27525918 DOI: 10.4238/gmr.15038475] [Citation(s) in RCA: 3] [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: 11/03/2022]
Abstract
The goal of this study was to study resistance inheritance in the soybean (Glycine max L.) accession PI 594767-A to the Phakopsora pachyrhizi isolate PPUFV02, and map the resistance gene(s) identified using microsatellite markers. Crosses between PI 594767-A and the susceptible cultivar 'Conquista' gave rise to the segregating subpopulations 26C-2 and 26C-5, which in the F2 generation were evaluated for their reactions to PPUFV02. In addition, analyses with microsatellite markers linked to the Rpp1-Rpp5 loci were also performed. The segregation pattern obtained in 26C-2 revealed that resistance was governed by a recessive gene; a 1:2:1 segregation pattern was observed in 26C-5, indicating control by a gene with partial dominance. This variability may have been caused because environmental conditions, particularly temperature, when 26C-5 was assessed were unfavorable for pathogen development, allowing the phenotypic expression of heterozygous alleles in PI 594767-A. A resistance gene was located in the soybean linkage group G, in the genomic region between Sct_187r2 and Sat_064 that contains the Rpp1 locus. Resistance in PI 594767-A is probably conferred by a new Rpp1 gene allele, because this accession has a haplotype for Sct_187r2 and Sat_064, which differs from haplotypes of accessions that also contain resistance alleles that map the Rpp1 locus. The use of Sct_187r2 and Sat_064 will facilitate the introgression of the resistance allele from PI 594767-A and its pyramiding with other resistance genes into genotypes with superior agronomic characteristics, in order to obtain cultivars with broad-spectrum resistance to P. pachyrhizi.
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Affiliation(s)
- G A F Rocha
- Programa de Pós-Graduação em Genética e Melhoramento, Laboratório de Genômica, Universidade Federal de Viçosa, Viçosa, MG, Brasil
| | - D P Alves
- Programa de Pós-Graduação em Genética e Melhoramento, Laboratório de Genômica, Universidade Federal de Viçosa, Viçosa, MG, Brasil
| | - J C Oliveira
- Programa de Pós-Graduação em Genética e Melhoramento, Laboratório de Genômica, Universidade Federal de Viçosa, Viçosa, MG, Brasil
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Oliveira JC, Vieira ICG, Almeida AS, Silva CA. Floristic and structural status of forests in permanent preservation areas of Moju river basin, Amazon region. BRAZ J BIOL 2016; 76:912-927. [PMID: 27191459 DOI: 10.1590/1519-6984.04415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 08/10/2015] [Indexed: 11/21/2022] Open
Abstract
The goal of this study is to analyze the floristic patterns and the structure of disturbed and undisturbed upland forests, in Permanent Preservation Areas (PPAs) along the Moju river, in the Brazilian state of Pará. Trees with a diameter equal to or larger than 10cm at 1.30m from the ground (DBH) ≥10cm were analyzed for the upper stratum. For the middle stratum, individuals with DBH between 4.99 and 9.99cm were sampled. Forty-five families and 221 species were found in disturbed forests, and 43 families and 208 species in undisturbed forests. Floristic similarity was high between strata and between forest types, with values above 50%. Similarity was highest between middle strata. The most species-abundant families in undisturbed forests were Fabaceae, Sapotaceae, Chrysobalanaceae and Myrtaceae; the species with the highest density there were Eschweilera grandiflora, Licania sclerophylla and Zygia cauliflora. In disturbed forests, the dominant families were Fabaceae, Sapotaceae, Lecythidaceae and Melastomataceae. The Shannon-Wiener diversity index was 3.21 for undisturbed forests and 2.85 for disturbed forests. Non-metric multidimensional scaling (MDS) analysis did not group the forests by their floristic composition in both upper and middle strata. Overall, the PPA forests along the Moju river, even if disturbed, did not show major floristic changes but substantially change their structural characteristics.
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Affiliation(s)
- J C Oliveira
- Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Bairro Terra Firme, CEP 66077-530, Belém, PA, Brazil
| | - I C G Vieira
- Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Bairro Terra Firme, CEP 66077-530, Belém, PA, Brazil
| | - A S Almeida
- Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Bairro Terra Firme, CEP 66077-530, Belém, PA, Brazil
| | - C A Silva
- Coordenação de Botânica, Museu Paraense Emílio Goeldi, Av. Perimetral, 1901, Bairro Terra Firme, CEP 66077-530, Belém, PA, Brazil
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Picciani BLS, Carneiro S, Sampaio ALB, Santos BM, Santos VCB, Gonzaga HFS, Oliveira JC, Porto LC, Dias EP. A possible relationship of human leucocyte antigens with psoriasis vulgaris and geographic tongue. J Eur Acad Dermatol Venereol 2014; 29:865-74. [PMID: 25176018 DOI: 10.1111/jdv.12691] [Citation(s) in RCA: 14] [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: 04/21/2014] [Accepted: 07/27/2014] [Indexed: 12/19/2022]
Abstract
BACKGROUND Geographic tongue (GT) is the most frequent oral lesion in psoriatic patients (PP), and genetic involvement in these conditions has been described. The association of psoriasis with GT is still not clear, and the study of human leucocyte antigen (HLA) may help clarify this relation. OBJECTIVE The aim of this study was to investigate the association of HLA alleles with psoriasis vulgaris and GT. METHODS Fifty-eight Brazilian PP, 29 GT patients and 125 healthy controls individuals were selected. Information on demographic and clinical characteristics was collected. All patients underwent an oral examination and blood collection for HLA typing. RESULTS HLA-A did not show significant differences in frequencies among the groups. HLA-B*57 allele was more frequently found in PP and was not found in GT. HLA-B*58 allele was more frequently found in GT. HLA-C*06 and -C*18 alleles were associated with psoriasis. No significant differences in HLA-DRB1 and HLA-DQB1 were observed. CONCLUSION HLA-B*58 was associated with GT and HLA-B*57 was possibly associated with psoriasis. This suggested that some GT cases may represent true oral psoriasis and some may represent only GT. Therefore, it is necessary to make this distinction and increase our sample size to improve the correct diagnosis and treatment of these conditions.
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Affiliation(s)
- B L S Picciani
- Department of Pathology, Universidade Federal Fluminense, Rio de Janeiro, Brazil
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Oliveira JC, Pezuk JA, Brassesco MS, Morales AG, Queiroz RGP, Scrideli CA, Tone LG. PLK1 expression and BI 2536 effects in childhood acute lymphoblastic leukemia. Pediatr Blood Cancer 2014; 61:1227-31. [PMID: 24519995 DOI: 10.1002/pbc.24978] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/16/2014] [Indexed: 01/22/2023]
Abstract
BACKGROUND Polo-like kinase 1 (PLK1) is a conserved kinase that mediates various mitotic events. Compelling data have repeatedly demonstrated its upregulation in different neoplasia, being frequently associated with poor prognosis. However, in childhood acute lymphoblastic leukemia (ALL), no studies have yet been conducted. PROCEDURE PLK1 expression and association with biological features were evaluated in 65 consecutively diagnosed childhood ALL samples by quantitative real-time PCR. Moreover, the effects of a specific PLK1 inhibitor, BI 2536, was tested against a panel of nine ALL cell lines at nanomolar concentrations (10, 50, 100 nM). RESULTS The mRNA expression of PLK1 showed great variability in pediatric ALL, but no difference was evidenced compared to normal bone marrow. Additionally, no association was found between PLK1 mRNA expression with any clinical or biological features. Alternatively, high mRNA expression of PLK1 was present in ALL cell lines. In vitro treatment with BI 2536 strongly diminished growth, while presenting significant reduction in colony formation capacity and increased apoptosis rates. Moreover, strong G2/M arrest was detected suggesting important impaired proliferation after treatment. CONCLUSIONS PLK1 mRNA expression level is not associated with prognosis in childhood ALL; however, considering the great variability observed in the sample and the in vitro experiments presented herein, BI 2536 treatment might serve as a promising therapeutic to enhance the efficacy of conventional treatment modalities in some childhood ALL cases.
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Affiliation(s)
- J C Oliveira
- Federal University of Alfenas, Minas Gerais, Brazil
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Monteiro WM, Magalhães LKC, Oliveira JC, Guerra JADO, Silveira H, Ferreira LCDL, Toledo MJDO, Barbosa MDGV. Biological behavior of Trypanosoma cruzi stocks obtained from the State of Amazonas, Western Brazilian Amazon, in mice. Rev Soc Bras Med Trop 2012; 45:209-14. [PMID: 22534994 DOI: 10.1590/s0037-86822012000200014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 09/19/2011] [Indexed: 05/26/2023] Open
Abstract
INTRODUCTION The biological diversity of circulating Trypanosoma cruzi stocks in the Amazon region most likely plays an important role in the peculiar clinic-epidemiological features of Chagas disease in this area. METHODS Seven stocks of T. cruzi were recently isolated in the State of Amazonas, Brazil, from humans, wild mammals, and triatomines. They belonged to the TcI and Z3 genotypes and were biologically characterized in Swiss mice. Parasitological and histopathological parameters were determined. RESULTS Four stocks did not promote patent parasitemia in mice. Three stocks produced low parasitemia, long pre-patent periods, and a patent period of 1 day or oscillating parasitemia. Maximum parasitemia ranged from 1,400 to 2,800 trypomastigotes/0.1 mL blood. Mice inoculated with the T. cruzi stocks studied showed low positivity during fresh blood examinations, ranging from 0% to 28.6%. In hemoculture, positivity ranged from 0% to 100%. Heart tissue parasitism was observed in mice inoculated with stocks AM49 and AM61. Stock AM49 triggered a moderate inflammatory process in heart tissue. A mild inflammatory process was observed in heart tissue for stocks AM28, AM38, AM61, and AM69. An inflammatory process was frequently observed in skeletal muscle. Examinations of brain tissue revealed inflammatory foci and gliosis in mice inoculated with stock AM49. CONCLUSIONS Biological and histopathological characterization allowed us to demonstrate the low infectivity and virulence of T. cruzi stocks isolated from the State of Amazonas.
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Affiliation(s)
- Wuelton Marcelo Monteiro
- Programa de Pós-Graduação em Medicina Tropical, Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Universidade do Estado do Amazonas, Manaus, AM.
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Peixoto E, Oliveira JC, Antas PRZ, Borba CM. In-vitro study of the host-parasite interactions between mouse macrophages and the opportunistic fungus Paecilomyces lilacinus. Ann Trop Med Parasitol 2011; 104:529-34. [PMID: 20863442 DOI: 10.1179/136485910x12786389891489] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- E Peixoto
- Instituto Oswaldo Cruz, FIOCRUZ, Rio de Janeiro, RJ, Brazil
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de Filippis AMB, Nogueira RMR, Schatzmayr HG, Tavares DS, Jabor AV, Diniz SCM, Oliveira JC, Moreira E, Miagostovich MP, Costa EV, Galler R. Outbreak of jaundice and hemorrhagic fever in the Southeast of Brazil in 2001: detection and molecular characterization of yellow fever virus. J Med Virol 2002; 68:620-7. [PMID: 12376973 DOI: 10.1002/jmv.10226] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Between January and March 2001, an outbreak of jaundice and hemorrhagic fever occurred in the state of Minas Gerais, Southeast region of Brazil, in which a mortality rate of 53% was reported. Seroconversion, virus isolation, histopathological and immunohistochemical findings, and reverse transcription-polymerase chain reaction (RT-PCR) identified yellow fever virus (YFV) as the etiological agent responsible for the outbreak. Partial nucleotide sequence analysis from a fragment of the YFV genome spanning parts of nonstructural (NS) 5 gene and 3' noncoding region (3' UTR) showed that the YFV involved in this outbreak belongs to South American genotype I and differs from the Brazilian virus identified in 1996.
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Affiliation(s)
- A M B de Filippis
- Laboratório de Flavivírus, Departamento de Virologia, Instituto Oswaldo Cruz, Fiocruz, RJ, Brasil.
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16
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Malato S, Blanco J, Vidal A, Fernández P, Cáceres J, Trincado P, Oliveira JC, Vincent M. New large solar photocatalytic plant: set-up and preliminary results. Chemosphere 2002; 47:235-240. [PMID: 11996143 DOI: 10.1016/s0045-6535(01)00220-x] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A European industrial consortium called SOLARDETOX has been created as the result of an EC-DGXII BRITE-EURAM-III-financed project on solar photocatalytic detoxification of water. The project objective was to develop a simple, efficient and commercially competitive water-treatment technology, based on compound parabolic collectors (CPCs) solar collectors and TiO2 photocatalysis, to make possible easy design and installation. The design, set-up and preliminary results of the main project deliverable, the first European industrial solar detoxification treatment plant, is presented. This plant has been designed for the batch treatment of 2 m3 of water with a 100 m2 collector-aperture area and aqueous aerated suspensions of polycrystalline TiO2 irradiated by sunlight. Fully automatic control reduces operation and maintenance manpower. Plant behaviour has been compared (using dichloroacetic acid and cyanide at 50 mg l(-1) initial concentration as model compounds) with the small CPC pilot plants installed at the Plataforma Solar de Almería several years ago. The first results with high-content cyanide (1 g l(-1)) waste water are presented and plant treatment capacity is calculated.
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Affiliation(s)
- S Malato
- Plataforma Solar de Almería (PSA), Tabernas, Almería, Spain.
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17
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Abstract
A 16S rDNA-directed polymerase chain reaction method was used to assess the occurrence of four black-pigmented anaerobic rods in root canal infections. Samples were obtained from 54 infected teeth. Ten cases were diagnosed as acute periradicular abscesses. DNA was extracted from the samples and analyzed using a polymerase chain reaction-based identification assay. The method allowed detection of black-pigmented bacteria anaerobes in 59.3% of the examined teeth. Twelve cases yielded more than one black-pigmented species. In general Porphyromonas endodontalis was found in 42.6%, Porphyromonas gingivalis in 27.8%, Prevotella nigrescens in 7.4%, and Prevotella intermedia in 5.6% of the cases. P. endodontalis was found in 70% of the pus samples, P. gingivalis in 40%, and P. intermedia in 10%. P. gingivalis was always found associated with P. endodontalis in abscessed teeth. P. nigrescens was not found in any pus sample. The high prevalence of P. endodontalis and P. gingivalis suggests that they can play an important role in the pathogenesis of periradicular diseases.
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Affiliation(s)
- J F Siqueira
- Department of Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
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18
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Porto G, Cardoso CS, Gordeuk V, Cruz E, Fraga J, Areias J, Oliveira JC, Bravo F, Gangaidzo IT, MacPhail AP, Gomo ZA, Moyo VM, Melo G, Silva C, Justiça B, de Sousa M. Clinical and genetic heterogeneity in hereditary haemochromatosis: association between lymphocyte counts and expression of iron overload. Eur J Haematol 2001; 67:110-8. [PMID: 11722599 DOI: 10.1034/j.1600-0609.2001.t01-1-00481.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [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: 12/11/2022]
Abstract
To identify a new marker of expression of disease, independent of HFE genotype in patients with hereditary haemochromatosis (HHC), the total peripheral blood lymphocyte counts were analysed according to iron status in two groups of subjects with HFE mutations. The groups consisted of 38 homozygotes for C282Y, and 107 heterozygotes for the C282Y or compound heterozygotes for C282Y and H63D. For control purposes, total lymphocyte counts and iron status were also examined in 20 index patients with African dietary iron overload, a condition not associated with HFE mutations, and in 144 members of their families and communities. Mean lymphocyte numbers were lower in C282Y homozygous HHC index subjects with cirrhosis and higher iron stores than in those without cirrhosis and with lower iron burdens [(1.65 +/- 0.43) x 10(6)/mL vs. (2.27 +/- 0.49) x 10(6)/mL; p = 0.008]. Similarly, mean lymphocyte counts were significantly lower in C282Y heterozygotes and C282Y/H63D compound heterozygotes with iron overload and increased serum ferritin concentrations compared to those with normal serum ferritin concentrations (p < 0.05). Statistically significant negative correlations were found, in males, between lymphocyte counts and the total body iron stores, either in C282Y homozygous HHC patients (p = 0.031 in a multiple regression model dependent on age) and in C282Y heterozygotes or C282Y/H63D compound heterozygotes with iron overload (p = 0.029 in a simple linear model). In contrast, lymphocyte counts increased with increasing serum ferritin concentrations among the index subjects with African iron overload (r = 0.324, not statistically significant) and among the members of their families and communities (r = 0.170, p = 0.042). These results suggest that a lower peripheral blood lymphocyte count is associated with a greater degree of iron loading in HFE haemochromatosis but not in African iron overload, and they support the notion that the lymphocyte count may serve as a marker of a non-HFE gene that influences the clinical expression of HFE haemochromatosis.
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Affiliation(s)
- G Porto
- Haematology, Santo António General Hospital, Porto, Portugal.
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19
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Siqueira JF, Rôças IN, Favieri A, Oliveira JC, Santos KR. Polymerase chain reaction detection of Treponema denticola in endodontic infections within root canals. Int Endod J 2001; 34:280-4. [PMID: 11482139 DOI: 10.1046/j.1365-2591.2001.00382.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM A 16S rDNA-based polymerase chain reaction (PCR) method was used to detect the occurrence of Treponema denticola in root canals. METHODOLOGY Samples were collected from 54 single-rooted teeth having carious lesions and necrotic pulps. DNA extracted from the samples was amplified using the PCR assay, which yielded a specific fragment of T. denticola 16S rDNA. RESULTS T. denticola was detected in 10 of 29 asymptomatic cases (34.5%), eight of 15 root canals that were tender to percussion (53.3%), and five of 10 teeth with acute periradicular abscess (50%). In general, T. denticola was found in 23 of 54 cases (42.6%). CONCLUSIONS Findings suggest that T. denticola can be involved in the pathogenesis of periradicular lesions of endodontic origin.
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Affiliation(s)
- J F Siqueira
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil.
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20
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Cardoso C, Porto G, Lacerda R, Resende D, Rodrigues P, Bravo F, Oliveira JC, Justiça B, de Sousa M. T-cell receptor repertoire in hereditary hemochromatosis: a study of 32 hemochromatosis patients and 274 healthy subjects. Hum Immunol 2001; 62:488-99. [PMID: 11334672 DOI: 10.1016/s0198-8859(01)00233-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [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: 02/06/2023]
Abstract
Low CD8(+) T lymphocyte numbers have contributed to deciphering the genotype/phenotype discrepancies found in hereditary hemochromatosis (HH) patients genotyped for the Hfe mutations, C282Y and H63D. In this study, we extend the analysis of T lymphocytes in HH to the T cell receptor (TcR) repertoire. Thirty-two HH patients (C282Y homozygous) and 274 Hfe genotyped healthy subjects were studied. The following TcR chains were analyzed: Valpha2.3, Vbeta5.1, Vbeta5.2, Vbeta5.3, Vbeta6.7, Vbeta8, and Vbeta12 among the CD4(+) and CD8(+) populations. Lymphopenias and absence of expansions of the Vbeta5.2 and Vbeta12 chains in the CD8(+) pool were seen in controls heterozygous for the C282Y mutation. Expansions in the control group were seen within the CD8(+) pool and were rare/absent within the CD4(+) pool. TcR expansions were found more frequent in patients with iron overload related pathology than in patients without pathology. 9/16 of the patients with pathology have at least one expansion among the CD8(+) pool a number significantly higher compared with patients without pathology (1/16). These findings suggest that Hfe has an effect in the shaping of T-cell populations either directly, as indicated by the lymphopenia seen in the two chains in C282Y heterozygous without iron overload, or indirectly by contributing to iron overload pathology.
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Affiliation(s)
- C Cardoso
- Molecular Immunology and Pathology, ICBAS and Molecular Immunology, IBMC, Porto, Portugal
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21
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Abstract
Cathepsin D, the principal indigenous acid proteinase in bovine milk, is a lysosomal proteinase, which exists in milk in four forms, including the inactive zymogen procathepsin D. The thermal inactivation kinetics of bovine cathepsin D, isolated from spleen and milk, were studied under isothermal conditions, using a specific HPLC assay to determine residual activity. Inactivation of the blood enzyme preparation followed first order kinetics, with z-values in phosphate buffer (pH 6.7) and skimmed milk of 6.5 and 7.6 degrees C, respectively, the enzyme being far more stable in the latter environment. Inactivation kinetics of the enzyme purified from milk were more complex, and could be best approximated by a double exponential model. Again, stability was higher in milk than in buffer. The double exponential model may indicate differing heat stabilities of isoforms of the enzyme, or stabilization of the enzyme by some milk constituent. It is clear that the enzyme can survive, at least partially, processes such as heating at 55 degrees C for 30 min during manufacture of high-cook cheese varieties (45% survival), and HTST pasteurization (8% survival), and thus may contribute to proteolysis in a range of dairy products.
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Affiliation(s)
- M G Hayes
- Department of Food Science, Food Technology and Nutrition, University College, Cork, Ireland
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22
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Siqueira JF, Rôças IN, Oliveira JC, Santos KR. Detection of putative oral pathogens in acute periradicular abscesses by 16S rDNA-directed polymerase chain reaction. J Endod 2001; 27:164-7. [PMID: 11487143 DOI: 10.1097/00004770-200103000-00004] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A 16S rDNA-directed polymerase chain reaction method was used to assess the occurrence of four black-pigmented anaerobic rods, Treponema denticola, and Actinobacillus actinomycetemcomitans in acute periradicular abscesses. Pus was collected by aspiration from 10 cases diagnosed as acute abscesses of endodontic origin. DNA was extracted from the samples and analyzed using a polymerase chain reaction-based identification assay. The method allowed detecting black-pigmented anaerobes in 80% of the examined abscesses. Porphyromonas endodontalis was found in 70%, T. denticola in 50%, Porphyromonas gingivalis in 40%, and Prevotella intermedia in 10% of the cases. P. gingivalis was always found associated with P. endodontalis. Prevotella nigrescens and A. actinomycetemcomitans were not found in any pus sample. The high prevalence of P. endodontalis, T. denticola, and P. gingivalis suggests that they can play an important role in the etiology of acute periradicular abscesses.
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Affiliation(s)
- J F Siqueira
- Department of Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
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23
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Abstract
The purpose of the present study was to evaluate the prevalence of Prevotella intermedia and Prevotella nigrescens in symptomatic and asymptomatic endodontic infections from a Brazilian population. DNA extracted from samples obtained from 28 cases of endodontic infection were examined by the 16S rDNA-directed Polymerase Chain Reaction (PCR) method. PCR detected P. intermedia in 7.1% of the cases (2 out of 28 teeth) and P. nigrescens in only one sample (3.6%). The low prevalence of P. intermedia and P. nigrescens as reported in the present study is probably justified for geographical reasons.
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Affiliation(s)
- J Siqueira Júnior
- Department of Endodontics, School of Dentistry, Estácio de Sá University, Rio de Janeiro.
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24
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Martinelli Filho M, Nishióka SA, Lopes H, Oliveira JC, Pedrosa AA, Siqueira SF, Costa R. Neurohumoral behavior in recipients of cardiac pacemakers controlled by a closed-loop autonomic nervous system-driven sensor. Pacing Clin Electrophysiol 2000; 23:1778-82. [PMID: 11139922 DOI: 10.1111/j.1540-8159.2000.tb07017.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The purpose of a sensor-driven pacing system is to physiologically correct chronotropic incompetence (CI). The aim of this study was to evaluate the changes in heart rate provided by a sympathetically driven pacemaker (PM) compared with normal sinus function (NSF). Nine men and six women (age 37-80 years) with AV block and a PM controlled by a closed-loop system were studied. Group I included eight patients with CI, and group II included seven patients with NSF. All patients underwent Valsalva maneuver and tilt table testing with measurements of plasma catecholamines and renin activity. Pacing was initially programmed in the DDDC mode at a lower rate (60 ppm) and upper rate limit (0.85 x [220 - age]), then in DDDR in group I and VVIR in group II. The second phase of the study consisted of nitroglycerin and phenylephrine infusions, and the third phase of physiological provocative maneuvers. The second and third phases were performed in three patients from each group with sensor activity On and Off. In group I, heart rate changed during tilt only in the DDDR mode. In group II, heart rate changes were comparable in both modes. Catecholamine levels in group I were higher during DDDC than during DDDR pacing (P < 0.05). In group I, heart rate did not change during phases II and IV of the Valsalva maneuver in the DDDC mode, but behaved nearly physiologically after sensor activation. A late and a paradoxical response to nitroglycerin was observed in groups I and II and to phenylephrine in group I. During physiological maneuvers, significantly greater variations in heart rate were observed during DDDR than during DDDC pacing. Sympathetic SDP provides physiological modulations of the heart rate were provided by a sympathetically driven pacing system in patients with AV block and CI.
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Affiliation(s)
- M Martinelli Filho
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil.
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25
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Arosa FA, Porto G, Cabeda JM, Lacerda R, Resende D, Cruz E, Cardoso C, Fonseca M, Simões C, Rodrigues P, Bravo F, Oliveira JC, Alves H, Fraga J, Justiça B, de Sousa M. Expansions of CD8+CD28- and CD8+TcRVbeta5.2+ T cells in peripheral blood of heavy alcohol drinkers. Alcohol Clin Exp Res 2000. [PMID: 10798589 DOI: 10.1111/j.1530-0277.2000.tb02020.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Despite heavy alcohol consumption, only a low percentage of heavy drinkers develop liver disease. Imbalances in T-cell subsets and iron metabolism parameters are common findings in heavy drinkers, yet the possible role played by discrete T-lymphocyte subsets under heavy alcohol consumption remains unclear. METHODS To gain new insights into the possible role played by T lymphocytes during alcohol consumption, characterization of CD28 expression and TcR repertoire in peripheral blood CD4+ and CD8+ T cells by two and three-color flow cytometry was performed. A group of heavy alcohol drinkers (AHD, n = 71) and a group of age-matched controls (n = 81), both HLA-phenotyped and HFE-genotyped, constituted the groups under study. RESULTS Marked expansions of CD28- T cells within the CD8+ but not the CD4+ T-cell pool were observed in AHD compared with controls. These CD8+CD28- expansions were paralleled by expansions of CD8+ T cells bearing specific TcR Valpha/beta chains, namely VP5.2. Moreover, AHD, but not controls, carrying the H63D mutation in the HFE gene showed significantly higher percentages of CD28- T cells within the CD8+ T-cell pool than AHD carrying the normal HFE gene. Finally, high numbers of CD8+CD28- T cells in AHD were associated with lower levels of the liver-related enzymes ALT and GGT. CONCLUSIONS This study showed that under active ethanol consumption, expansions of discrete CD8+ T-cell subsets occur within the CD8+ T-cell pool, that molecules of the MHC-class I locus seem to influence the extent of the expansions, and that high numbers of CD8+CD28- T cells are associated with low levels of liver enzymes in AHD.
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Affiliation(s)
- F A Arosa
- Laboratory of Molecular Immunology, Institute for Molecular and Cell Biology, Porto, Portugal.
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26
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Reimão R, Souza JC, Gaudioso CE, Guerra HD, Alves AD, Oliveira JC, Gnobie NC, Silvério DC. Nocturnal sleep pattern in Native Brazilian Terena adults. Arq Neuropsiquiatr 2000; 58:233-8. [PMID: 10849620 DOI: 10.1590/s0004-282x2000000200005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Social-economic factors influence sleep habits. This research analyzes characteristics of nocturnal sleep in Brazilian Native Terena adults. Sixty-four adults (31 M; 33 F) from 18 to 75 years, with a mean age of 37.0, from the Indian Reservation village of Córrego do Meio, in the central region of Mato Grosso do Sul, an agriculturally oriented group were evaluated. Nocturnal sleep characteristics were evaluated by means of a standard questionnaire applied to each individual. It was observed that reported nocturnal sleep was longer, sleep onset was earlier and wake up time was also earlier than usually described in urban populations. The mean total time in bed was 8.5 h or more, in every age bracket. The seven-day prevalence rate of insomnia was 4.6%, while the seven-day prevalence rate of hypnotic use was 1.5%, both remarkably less than described in urban populations. These findings stress the need to consider ethnic influences on sleep patterns and disorders.
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Affiliation(s)
- R Reimão
- CDS-Centro de Distúrbios do Sono(R), São Paulo
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27
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Reimão R, Souza JC, Gaudioso CE, Guerra HD, Alves AD, Oliveira JC, Gnobie NC, Silvério DC. Siestas among Brazilian Native Terena adults : a study of daytime napping. Arq Neuropsiquiatr 2000; 58:39-44. [PMID: 10770864 DOI: 10.1590/s0004-282x2000000100006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Regular daytime napping behavior, also known as siesta culture, is influenced by circadian, cultural and environmental factors. This research analyzes characteristics of regular daytime napping in Brazilian Native Terenas. We evaluated 65 adults ( 32 M; 33 F ) from 18 to 75 years, with a mean age of 37.2, from the Indian Reservation village Córrego do Meio, in the central region of Mato Grosso do Sul. Daytime napping characteristics were evaluated by means of a standard questionnaire applied to each individual. It was observed that weekly daytime napping (at least once a week) was present in 72. 3% of the population. There was a tendency to occur in males. The effects of weekends was mild. Mean onset time of daytime sleep was 12.2 h, remarkably earlier than usually described in urban populations. This data stresses the need to consider ethnic influences in order to understand sleep habits.
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Affiliation(s)
- R Reimão
- CDS-Centro de Distúrbios do Sono, São Paulo. SP
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28
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Abstract
The antiarthritic effect of a hydroalcohol extract of Pterodon pubescens (HEPp) seeds was tested using collagen-induced arthritis (CIA) in DBA1/J mice treated with daily oral doses of HEPp in different schedules. The preventive treatment significantly reduced both the arthritic index (AI) and the CIA incidence. Using a therapeutic protocol, only the lower dose of HEPp induced a decrease in both parameters. These results provide a scientific foundation for the popular use of Pp seed infusions in rheumatoid arthritis (RA) treatment.
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Affiliation(s)
- K C Sabino
- Departamento de Bioquímica, Instituto de Biologia, Centro Biomédico, Universidade do Estado do Rio de Janeiro, 20511-013, Programa de Medicina Experimental, INCA, Rio de Janeiro, RJ, Brazil
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29
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Reimão R, de Souza JC, Gaudioso CE, Guerra HDC, Alves A das C, Oliveira JC, Gnobie NC, Silvério DC. Sleep characteristics in children in the isolated rural African-Brazilian descendant community of Furnas do Dionísio, State of Mato Grosso do Sul, Brazil. Arq Neuropsiquiatr 1999; 57:556-60. [PMID: 10667276 DOI: 10.1590/s0004-282x1999000400003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Developmental and cultural factors affect sleep habits in childhood. The objective of this research was to determine sleep habits of children in the isolated rural African-Brazilian community of Furnas do Dionísio. Mato Grosso do Sul, Brazil. The members of this community are closely related descendants of the ex-slave Dionísio, and remained in relative geographical isolation for about a century. Sleep characteristics of 55 children (35 M; 20 F), 2 to 10 year olds, were evaluated in interviews with their mothers. The results showed that cosleeping, in the same bed with family members, was present in 80.0% of the 2-3 year olds; decreasing to 25.0% of the 8-10 year olds. Only 5.4% of the children slept alone in their own bedroom. Mean number of persons per bedroom was 2.8. Only 7.0% of the bedrooms had TV; 98.1% slept in silence. The data obtained support the need to weigh cultural factors influence on sleep.
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Affiliation(s)
- R Reimão
- CDS-Centro de Distúrbios do Sono, São Paulo, Brasil.
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30
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Oliveira JC, Constantino MD, Sebastião AM, Ribeiro JA. Ascorbate/Fe(3+)-induced peroxidation and inhibition of the binding of A1 adenosine receptor ligands in rat brain membranes. Neurochem Int 1995; 26:263-8. [PMID: 7787774 DOI: 10.1016/0197-0186(94)00124-d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The effect of peroxidation induced by the ascorbate/Fe3+ system on the binding properties of the A1 adenosine receptor, was studied in rat brain membranes, using the agonist, [3H]R-N6-phenylisopropyladenosine ([3H]R-PIA), and the antagonist, [3H]1,3-dipropyl-8-cyclopentylxanthine ([3H]DPCPX). For the agonist, as well as for the antagonist, the number of binding sites (Bmax) was significantly (P < 0.05) reduced after pretreatment of the membranes with ascorbate/Fe3+. The affinity of the agonist for the binding sites was not statistically modified (P > 0.05) after ascorbate/Fe3+ pretreatment, whereas the Kd value of the antagonist was increased (P < 0.05) by a factor of 2. Ascorbate/Fe3+ pretreatment affected agonist binding in the presence of GTP in a similar way as that observed in the absence of GTP, suggesting that peroxidation also affects agonist binding to A1 adenosine receptors uncoupled to G-proteins. The results suggest that when brain membranes suffer free radical oxidative damage, the adenosine modulation of neuronal activity through A1 receptors could be less efficient.
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Affiliation(s)
- J C Oliveira
- Laboratory of Pharmacology, Gulbenkian Institute of Science, Oeiras, Portugal
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31
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Abstract
1. Radioligand binding properties of the adenosine receptor ligands, [3H]-1,3-dipropyl-8-cyclopentylxanthine ([3H]-DPCPX), and [3H]-R-phenylisopropyladenosine ([3H]-R-PIA) were investigated in frog brain membranes. 2. The specific binding of the adenosine antagonist, [3H]-DPCPX to frog brain membranes showed one binding site with Kd and Bmax values of 43.8 nM and 0.238 +/- 0.016 pmol mg-1 protein, respectively. Guanosine 5'-triphosphate (GTP, 100 microM) decreased to 72 +/- 7% and Mg2+ (8 mM) increased to 121 +/- 3% [3H]-DPCPX (40 nM) binding to frog brain membranes. 3. [3H]-DPCPX saturation binding experiments performed in the presence of Mg2+ (8 mM), or in the presence of GTP showed that Mg2+ ions decreased the Kd value of [3H]-DPCPX to 14 nM, and GTP increased this value to 65.6 nM. Bmax values were not significantly (P > 0.05) modified (0.261 +/- 0.018 pmol mg-1 protein, with Mg2+, and 0.266 +/- 0.026 pmol mg-1 protein, in presence of GTP) by the presence of Mg2+ or GTP. 4. The specific binding of [3H]-R-PIA (15 nM) was decreased to 37 +/- 6% by GTP (100 microM) and increased to 123 +/- 4% by Mg2+ (8 mM). [3H]-R-PIA saturation binding experiments performed in the presence of Mg2+ (8 mM) showed one binding site with Kd and Bmax values of 0.9 nM and 0.229 +/- 0.008 pmol mg-1 of protein, respectively. 5. The concentration-inhibition curves of adenosine agonists and antagonists versus [3H]-DPCPX binding showed the following order of potencies: CPA> R-PIA~ NECA> S-PIA> > CGS 21680, for the agonists, and XAC ~-DPCPX> > XCC> PACPX, for the antagonists.6. The present results suggest that the adenosine binding site in the frog brain membranes is G-protein coupled, but that the antagonist affinities and the pharmacological profile is different from the Al or A2 adenosine receptors.
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Affiliation(s)
- J C Oliveira
- Laboratory of Pharmacology, Gulbenkian Institute of Science, Oeiras, Portugal
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Oliveira JC, Sebastião AM, Ribeiro JA. Solubilized rat brain adenosine receptors have two high-affinity binding sites for 1,3-dipropyl-8-cyclopentylxanthine. J Neurochem 1991; 57:1165-71. [PMID: 1895101 DOI: 10.1111/j.1471-4159.1991.tb08275.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The specific binding of L-N6-[3H]phenylisopropyladenosine (L-[3H]PIA) to solubilized receptors from rat brain membranes was studied. The interaction of these receptors with relatively low concentrations of L-[3H]PIA (0.5-12.0 nM) in the presence of Mg2+ showed the existence of two binding sites for this agonist, with respective dissociation constant (KD) values of 0.24 and 3.56 nM and respective receptor number (Bmax) values of 0.28 +/- 0.03 and 0.66 +/- 0.05 pmol/mg of protein. In the presence of GTP, the binding of L-[3H]PIA also showed two sites with KD values of 24.7 and 811.5 nM and Bmax values of 0.27 +/- 0.09 and 0.93 +/- 0.28 pmol/mg of protein for the first and the second binding site, respectively. Inhibition of specific L-[3H]PIA binding by 1,3-dipropyl-8-cyclopentylxanthine (DPCPX) (0.1-300 nM) performed with the same preparations revealed two DPCPX binding sites with Ki values of 0.29 and 13.5 nM, respectively. [3H]DPCPX saturation binding experiments also showed two binding sites with respective KD values of 0.81 and 10.7 nM and respective Bmax values of 0.19 +/- 0.02 and 0.74 +/- 0.06 pmol/mg of protein. The results suggest that solubilized membranes from rat brain possess two adenosine receptor subtypes: one of high affinity with characteristics of the A1 subtype and another with lower affinity with characteristics of the A3 subtype of adenosine receptor.
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Affiliation(s)
- J C Oliveira
- Laboratory of Pharmacology, Gulbenkian Institute of Science, Oeiras, Portugal
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Freire-Maia N, de Andrade FL, de Athayde-Neto A, Cavalli IJ, Oliveira JC, Marçallo FA, Coelho A. Genetic investigations in a Northern Brazilian island. II. Random drift. Hum Hered 1978; 28:401-10. [PMID: 680702 DOI: 10.1159/000152991] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
18 albinos were born on Lençóis island. Since 3 of them died and 5 emigrated, the prevalence of albinism is about 3% in the island. 2 inbred brothers with brachydactyly of the index fingers and 1 case of 'achondroplasia' were also found. The analysis of the population structure of the island suggests that its high frequency of albinism may have been produced by random drift. The index of isolation of its present population is roughly 17--27. Genealogical, clinical and histological data are presented and anslyzed. Natural selection is not acting against the albinism gene at a measurable rate. Cytogenetic investigations among albinos and normals did not reveal any difference as regards frequency of aneuploidy, association of acrocentrics and chromatid gaps. The role of random processes in evolution is mentioned and the possibility that they may be more important than it is sometimes assumed is stressed.
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Maranhão MF, Lopes M, Rocha SW, Oliveira PF, Oliveira JC, Furlan L, Ramalho J, Romero Rojas RI, Carvalho RD, Loures DR, da Cunha GP. [Treatment of heart arrhythmia with phentolamine (preliminary report)]. Arq Bras Cardiol 1976; 28:107-15. [PMID: 1259620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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