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Serrano IM, Ribeiro G, Santos RS, Cruz JS, Lanza FC, dos Santos EF, de Almeida MC, Soares JFDS, Luquetti AO, Celedon PAF, Zanchin NIT, Santos FLN, dos Reis MG. IgG Isotypes Targeting a Recombinant Chimeric Protein of Trypanosoma cruzi in Different Clinical Presentations of Chronic Chagas Disease. Am J Trop Med Hyg 2024; 110:669-676. [PMID: 38412539 PMCID: PMC10993828 DOI: 10.4269/ajtmh.23-0652] [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: 09/18/2023] [Accepted: 11/24/2023] [Indexed: 02/29/2024] Open
Abstract
Chagas disease (CD) is caused by the protozoan Trypanosoma cruzi, which leads to a spectrum of clinical presentations that range from asymptomatic to severe cardiac involvement. The host immune response plays a pivotal role in disease progression. Ig isotypes may contribute to disease pathogenesis. Investigating these components can provide insights into the immunopathogenic mechanisms underlying CD. This cross-sectional study aims to establish a correlation between the Ig profile of individuals infected with T. cruzi with the clinical forms of chronic CD. Serum samples were collected from partner institutions in different states of Brazil. Individuals diagnosed with chronic CD were categorized based on the clinical form of the disease. The indirect ELISA method using the recombinant chimeric Molecular Biology Institute of Paraná membrane protein 8.4 as the antigen was used to determine the Ig profile, including total IgG, IgG1, IgG2, IgG3, and IgG4. Ninety-seven serum samples from patients classified as negative (NEG, n = 38), indeterminate (IND, n = 24), mild cardiac (MC, n = 20), and severe cardiac (SC, n = 15) forms were analyzed. IgG1 exhibited greater levels compared with the other isotypes, showing a significant difference between the MC and IND groups. IgG3 levels were greater in individuals from the MC group compared with the SC group. IgG1 and IgG3 isotypes can serve as biomarkers to evaluate the progression of CD because they exhibit variations across clinical groups. Additional longitudinal studies are necessary to explore the relationship between antibody kinetics and the development of tissue damage.
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Affiliation(s)
- Isabela Machado Serrano
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
- Advanced Health Public Laboratory, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
| | - Gilmar Ribeiro
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
- Integrated Translational Program in Chagas Disease, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | | | - Jaqueline Silva Cruz
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
| | - Fernanda Cardoso Lanza
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
| | - Emily Ferreira dos Santos
- Advanced Health Public Laboratory, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
| | - Márcio Cerqueira de Almeida
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
| | | | | | - Paola Alejandra Fiorani Celedon
- Laboratory of Molecular and Systems Biology of Trypanosomatids, Carlos Chagas Institute, Oswaldo Cruz Foundation–Paraná, Curitiba, Brazil
| | - Nilson Ivo Tonin Zanchin
- Integrated Translational Program in Chagas Disease, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
- Laboratory of Structural Biology and Protein Engineering Laboratory, Carlos Chagas Institute, Oswaldo Cruz Foundation–Paraná, Curitiba, Brazil
| | - Fred Luciano Neves Santos
- Advanced Health Public Laboratory, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
- Integrated Translational Program in Chagas Disease, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Mitermayer Galvão dos Reis
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Institute, Oswaldo Cruz Foundation–Bahia, Salvador, Brazil
- Integrated Translational Program in Chagas Disease, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
- Faculty of Medicine, Federal University of Bahia, Salvador, Brazil
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, Yale University, New Haven, Connecticut
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Pieri OS, Bezerra FSM, Coelho PMZ, Enk MJ, Favre TC, Graeff-Teixeira C, Oliveira RR, dos Reis MG, Andrade LSDA, Beck LCNH, Favero V, Fialho TRDS, Guimarães RJDPSE, Oliveira BSS, Pascoal VF, Pinheiro MCC, dos Santos RA, Silva LK, de Siqueira IC, de Souza RP, Katz N. Accuracy of the urine point-of-care circulating cathodic antigen assay for diagnosing Schistosomiasis mansoni infection in Brazil: A multicenter study. Rev Soc Bras Med Trop 2023; 56:S0037-86822023000100600. [PMID: 36700600 PMCID: PMC9870275 DOI: 10.1590/0037-8682-0238-2022] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 10/13/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND The World Health Organization recommends a market-ready, urine-based point-of-care diagnostic test for circulating cathodic antigens (CCA) to determine the prevalence of S. mansoni. This study evaluated the performance of the URINE CCA (SCHISTO) ECO TESTE® (POC-ECO), which is currently available in Brazil. METHODS Residents from eight sites with different prevalence estimates provided one urine sample for POC-ECO and one stool sample for Kato-Katz (KK) and Helmintex® (HTX) testing as an egg-detecting reference for infection status. RESULTS None of the study sites had significantly higher POC-ECO accuracy than KK. CONCLUSIONS POC-ECO is not currently recommended in Brazilian schistosomiasis elimination programs.
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Affiliation(s)
- Otavio Sarmento Pieri
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Educação em Ambiente e Saúde, Rio de Janeiro, RJ, Brasil.
| | | | | | - Martin Johannes Enk
- 4Instituto Evandro Chagas, Laboratório de Parasitoses Intestinais, Esquistossomose e Malacologia, Secção de Parasitologia, Ananindeua, PA, Brasil.
| | - Tereza Cristina Favre
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Educação em Ambiente e Saúde, Rio de Janeiro, RJ, Brasil.
| | - Carlos Graeff-Teixeira
- Universidade Federal do Espírito Santo, Centro de Ciências da Saúde, Unidade de Doenças Infecciosas, Vitória, ES, Brasil. ,Pontifícia Universidade Católica do Rio Grande do Sul, Laboratório de Parasitologia Biomédica, Porto Alegre, RS, Brasil.
| | | | - Mitermayer Galvão dos Reis
- Fundação Oswaldo Cruz, Instituto Gonçalo Moniz, Salvador, BA, Brasil. ,Universidade Federal da Bahia, Faculdade de Medicina, Salvador, BA, Brasil. ,Yale University, School of Public Health, Department of Epidemiology of Microbial Diseases, New Haven, CT, United States of America.
| | | | | | - Vivian Favero
- Pontifícia Universidade Católica do Rio Grande do Sul, Laboratório de Parasitologia Biomédica, Porto Alegre, RS, Brasil.
| | | | | | | | - Vanessa Fey Pascoal
- Pontifícia Universidade Católica do Rio Grande do Sul, Laboratório de Parasitologia Biomédica, Porto Alegre, RS, Brasil.
| | | | | | | | | | - Renata Perotto de Souza
- Pontifícia Universidade Católica do Rio Grande do Sul, Laboratório de Parasitologia Biomédica, Porto Alegre, RS, Brasil.
| | - Naftale Katz
- Fundação Oswaldo Cruz, Instituto René Rachou, Belo Horizonte, MG, Brasil.
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Nogueira RLR, de Araújo TBS, Valverde LF, Silva VAO, Cavalcante BRR, Rossi EA, Allahdadi KJ, dos Reis MG, Pereira TA, Coletta RD, Bezerra DP, de Freitas Souza BS, Dias RB, Rocha CAG. Arsenic Trioxide Triggers Apoptosis of Metastatic Oral Squamous Cells Carcinoma with Concomitant Downregulation of GLI1 in Hedgehog Signaling. Biomedicines 2022; 10:biomedicines10123293. [PMID: 36552049 PMCID: PMC9775978 DOI: 10.3390/biomedicines10123293] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/03/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
Given the lack of advances in Oral Squamous Cell Carcinoma (OSCC) therapy in recent years, pharmacological strategies to block OSCC-related signaling pathways have gained prominence. The present study aimed to evaluate the therapeutic potential of Arsenic Trioxide (ATO) concerning its antitumoral effects and the inhibition of the Hedgehog (HH) pathway in OSCC. Initially, ATO cytotoxicity was assessed in a panel of cell lines. Cell viability, cell cycle, death patterns, and cell morphology were analyzed, as well as the effect of ATO on the expression of HH pathway components. After the cytotoxic assay, HSC3 cells were chosen for all in vitro assays. ATO increased apoptotic cell death and nuclear fragmentation in the sub-G1 cell cycle phase and promoted changes in cell morphology. In addition, the reduced expression of GLI1 indicated that ATO inhibits HH activity. The present study provides evidence of ATO as an effective cytotoxic drug for oral cancer treatment in vitro.
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Affiliation(s)
- Raphael Luís Rocha Nogueira
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
| | - Taís Bacelar Sacramento de Araújo
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador 40100-150, Bahia, Brazil
| | - Ludmila Faro Valverde
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador 40100-150, Bahia, Brazil
| | - Viviane Aline Oliveira Silva
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
- Molecular Oncology Research Center, Barretos Cancer Hospital, Barretos 14784-400, São Paulo, Brazil
| | - Bruno Raphael Ribeiro Cavalcante
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
| | - Erik Aranha Rossi
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
- Center for Biotechnology and Cell Therapy, D’Or Institute for Research and Education (IDOR), São Rafael Hospital, Salvador 41253-190, Bahia, Brazil
| | - Kyan James Allahdadi
- Center for Biotechnology and Cell Therapy, D’Or Institute for Research and Education (IDOR), São Rafael Hospital, Salvador 41253-190, Bahia, Brazil
| | - Mitermayer Galvão dos Reis
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
| | - Thiago Almeida Pereira
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, CA 94305, USA
| | - Ricardo D. Coletta
- Department of Oral Diagnosis, School of Dentistry University of Campinas, Piracicaba 13414-903, São Paulo, Brazil
- Graduate Program in Oral Biology, School of Dentistry University of Campinas, Piracicaba 13414-903, São Paulo, Brazil
| | - Daniel Pereira Bezerra
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
| | - Bruno Solano de Freitas Souza
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
- Center for Biotechnology and Cell Therapy, D’Or Institute for Research and Education (IDOR), São Rafael Hospital, Salvador 41253-190, Bahia, Brazil
| | - Rosane Borges Dias
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador 40100-150, Bahia, Brazil
| | - Clarissa A. Gurgel Rocha
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador 40296-710, Bahia, Brazil
- Department of Pathology, School of Medicine of the Federal University of Bahia, Salvador 40110-909, Bahia, Brazil
- Department of Propedeutics, School of Dentistry of the Federal University of Bahia, Salvador 40100-150, Bahia, Brazil
- Center for Biotechnology and Cell Therapy, D’Or Institute for Research and Education (IDOR), São Rafael Hospital, Salvador 41253-190, Bahia, Brazil
- Correspondence: ; Tel.: +55-71-3176-2209
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Favre TC, Beck LCNH, Bezerra FSM, Graeff-Teixeira C, Coelho PMZ, Enk MJ, Katz N, Oliveira RR, Reis MGD, Pieri OS. Reliability of point-of-care circulating cathodic antigen assay for diagnosing schistosomiasis mansoni in urine samples from an endemic area of Brazil after one year of storage at -20 degrees Celsius. Rev Soc Bras Med Trop 2022; 55:e0389. [PMID: 35239906 PMCID: PMC8909435 DOI: 10.1590/0037-8682-0389-2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 11/24/2021] [Indexed: 11/22/2022] Open
Abstract
Background The World Health Organization recommends reliable point-of-care (POC) diagnostic testing to eliminate schistosomiasis. Lateral flow immunoassay that detects schistosome circulating cathodic antigen (CCA) in urine to establish prevalence thresholds for intervention in endemic areas is recommended. Stored urine may be useful if surveying at-risk populations is delayed or interrupted by unforeseen circumstances, such as the current COVID-19 pandemic. This study evaluated the manufacturer’s claim that Schistosoma mansoni infection can be reliably diagnosed in urine samples stored at -20°C for one year. Methods Two-hundred-forty-two subjects from an endemic site in Brazil provided one urine sample each for testing with URINE CCA (SCHISTO) ECO TESTE® (POC-ECO) and one stool sample each for testing with Kato-Katz (KK) and Helmintex® (HTX) as a robust reference standard for infection status. At least 2 ml of urine from each participant was stored at -20°C; after one year, 76 samples were randomly selected for POC-ECO retesting. Results: The POC-ECO agreement between freshly collected and stored urine was inadequate considering trace results as positive (Cohen’s kappa coefficient κ = 0.08) and negative (κ = 0.36). POC-ECO accuracy was not significantly greater than that of routine KK (54%; 95% confidence interval: 42.1%-65.5%). Conclusions The precision and accuracy of POC-ECO have to be optimized in both freshly collected and stored urine before it can be recommended for use in control programs in Brazil.
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Affiliation(s)
| | | | | | - Carlos Graeff-Teixeira
- Universidade Federal do Espírito Santo, Brasil; Pontifícia Universidade Católica do Rio Grande do Sul, Brasil
| | | | | | | | | | - Mitermayer Galvão dos Reis
- Fundação Oswaldo Cruz, Brasil; Universidade Federal da Bahia, Brasil; Yale University, United States of America
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Mendes DS, Santos LHP, Cavalcanti LADS, Paraná VC, Alves JSF, Lyra AC, Motta MP, Schinoni MI, Santana NP, Alves CRB, Almeida ADM, Batista PBP, Ribas JRL, Mascarenhas MTVL, Zarife MAS, Couto RD, Pacheco SR, Filho RPF, dos Reis MG, Silva LK. ESTUDO INTEGRADO DA HEPATITE E EM SALVADOR-BA. Braz J Infect Dis 2022. [DOI: 10.1016/j.bjid.2021.102101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Del-Rei RP, Leony LM, Celedon PAF, Zanchin NIT, dos Reis MG, Gomes YDM, Schijman AG, Longhi SA, Santos FLN. Detection of anti-Trypanosoma cruzi antibodies by chimeric antigens in chronic Chagas disease-individuals from endemic South American countries. PLoS One 2019; 14:e0215623. [PMID: 30998741 PMCID: PMC6472793 DOI: 10.1371/journal.pone.0215623] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 04/04/2019] [Indexed: 12/21/2022] Open
Abstract
Background Laboratory diagnosis of chronic Chagas disease is a troubling factor due to lack of reference tests. The WHO suggests the use of two distinct commercial serological tests in parallel. The performance of commercial immunoassays might fluctuate depending on the antigenic matrices and the local strains of T. cruzi in different geographical settings. The use of antigenic matrices based on chimeric proteins can solve these limitations. Here, we evaluated the diagnostic performance of two chimeric T. cruzi antigens (IBMP-8.1 and -8.4) to diagnose chronic Chagas disease in individuals from endemic South American countries. Methodology/Principal findings IBMP-8.1 and IBMP-8.4 chimeric antigens were expressed as soluble proteins in E. coli and purified using chromatography methods. Reactivity of IBMP-8.1 and IBMP-8.4 was assessed using an in-house ELISA with sera from 122 non-infected and 215 T. cruzi-infected individuals from Argentina, Bolivia, and Paraguay. Cut-off values were based on ROC curves and performance parameters were determined using a dichotomous approach. Area under the curve values were > 99.7% for both IBMP-8.1 and IBMP-8.4 antigens. IgG levels in T. cruzi-positive and negative samples were higher for IBMP-8.4 than IBMP-8.1. Both IBMP-8.1 and -8.4 were 100% specific, while IBMP-8.4 were 100% sensitive compared to IBMP-8.1 (95.3%). Admitting RI values of 1.0 ± 0.10 as the inconclusive interval, 6.2% of the samples tested using IBMP-8.1 and 2.1% using IBMP-8.4 fell inside the grey zone. Based on accuracy and diagnostic odds ratio values, IBMP-8.4 presented the best performance. Differences in sensitivity and IgG levels among the samples from Argentina, Bolivia, and Paraguay were not significant. Conclusions/Significance Our findings showed a notable performance of IBMP-8.1 and -8.4 chimeric antigens in diagnosing chronic Chagas disease in individuals from endemic South American countries, confirming our hypothesis that these antigens could be used in geographical areas where distinct T. cruzi DTUs occur.
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Affiliation(s)
| | | | | | | | - Mitermayer Galvão dos Reis
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation, Salvador, Bahia, Brazil
- Department of Pathology and Legal Medicine, Federal University of Bahia, Salvador, Bahia, Brazil
- Department of Epidemiology of Microbial Diseases, School of Public Health, Yale University, New Haven, Connecticut, United States of America
| | | | - Alejandro Gabriel Schijman
- Laboratory of Molecular Biology of Chagas Disease, Institute for Research on Genetic Engineering and Molecular Biology “Dr Héctor Torres”, Buenos Aires, Argentina
| | - Silvia Andrea Longhi
- Laboratory of Molecular Biology of Chagas Disease, Institute for Research on Genetic Engineering and Molecular Biology “Dr Héctor Torres”, Buenos Aires, Argentina
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Santos AAN, Figueira CP, dos Reis MG, Costa F, Ristow P. Heterogenic colonization patterns by Leptospira interrogans in Rattus norvegicus from urban slums. Braz J Microbiol 2015; 46:1161-4. [PMID: 26691476 PMCID: PMC4704622 DOI: 10.1590/s1517-838246420140873] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 10/17/2014] [Accepted: 02/02/2015] [Indexed: 11/21/2022] Open
Abstract
We evaluated the renal colonization by Leptospira interrogans in
Rattus norvegicus (rats), as it is the major natural reservoir of
urban leptospirosis. We caught 72 R. norvegicus, out of which 32
were found to be positive for L. interrogans by immunofluorescence
assay. From these rats, we selected 17 and divided them into six groups based on the
mass-age/sex. We performed the immunohistochemistry test against L.
interrogans in the kidney sections of the rats and systematically counted
the colonized tubules (CTs) in 20 fields. The proportion of positive fields varied
from 5% to 95%. The number of CTs in 20 fields varied from 0.5 to 85.5. These
differences were not related to age or sex of the animals. The characterization of
leptospiral colonization patterns in the natural reservoirs is important to better
understand the host-pathogen interactions in leptospirosis.
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Affiliation(s)
| | | | | | - Federico Costa
- Instituto de Saúde Coletiva, Universidade Federal da Bahia, Salvador, BA, Brazil
| | - Paula Ristow
- Laboratório de Patologia e Biologia Molecular, Fundação Oswaldo Cruz, Salvador, BA, Brazil
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Larentis AL, Nicolau JFMQ, Esteves GDS, Vareschini DT, de Almeida FVR, dos Reis MG, Galler R, Medeiros MA. Evaluation of pre-induction temperature, cell growth at induction and IPTG concentration on the expression of a leptospiral protein in E. coli using shaking flasks and microbioreactor. BMC Res Notes 2014; 7:671. [PMID: 25252618 PMCID: PMC4190419 DOI: 10.1186/1756-0500-7-671] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [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: 10/30/2013] [Accepted: 08/27/2014] [Indexed: 11/23/2022] Open
Abstract
Background Leptospirosis is a zoonose that is increasingly endemic in built-up areas, especially where there are communities living in precarious housing with poor or non-existent sanitation infrastructure. Leptospirosis can kill, for its symptoms are easily confused with those of other diseases. As such, a rapid diagnosis is required so it can be treated effectively. A test for leptospirosis diagnosis using Leptospira Immunoglobulin-like (Lig) proteins is currently at final validation at Fiocruz. Results In this work, the process for expression of LigB (131-645aa) in E. coli BL21 (DE3)Star™/pAE was evaluated. No significant difference was found for the experiments at two different pre-induction temperatures (28°C and 37°C). Then, the strain was cultivated at 37°C until IPTG addition, followed by induction at 28°C, thereby reducing the overall process time. Under this condition, expression was assessed using central composite design for two variables: cell growth at which LigB (131-645aa) was induced (absorbance at 600 nm between 0.75 and 2.0) and inducer concentration (0.1 mM to 1 mM IPTG). Both variables influenced cell growth and protein expression. Induction at the final exponential growth phase in shaking flasks with Absind
= 2.0 yielded higher cell concentrations and LigB (131-645aa) productivities. IPTG concentration had a negative effect and could be ten-fold lower than the concentration commonly used in molecular biology (1 mM), while keeping expression at similar levels and inducing less damage to cell growth. The expression of LigB (131-645aa) was associated with cell growth. The induction at the end of the exponential phase using 0.1 mM IPTG at 28°C for 4 h was also performed in microbioreactors, reaching higher cell densities and 970 mg/L protein. LigB (131-645aa) was purified by nickel affinity chromatography with 91% homogeneity. Conclusions It was possible to assess the effects and interactions of the induction variables on the expression of soluble LigB (131-645aa) using experimental design, with a view to improving process productivity and reducing the production costs of a rapid test for leptospirosis diagnosis.
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Affiliation(s)
- Ariane Leites Larentis
- Fiocruz, Bio-Manguinhos, Vice Directory of Technological Development, Laboratory of Recombinant Technologies (LATER), Av, Brasil 4365, Manguinhos, Rio de Janeiro, RJ 21,040-360, Brazil.
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Santos CS, de Azevedo EC, Soares LM, Carvalho MOS, dos Santos AC, Chagas ADD, da Silva CLR, Chagas UMR, dos Reis MG, Athanazio DA. Ionic imbalance and lack of effect of adjuvant treatment with methylene blue in the hamster model of leptospirosis. Mem Inst Oswaldo Cruz 2013. [PMID: 23827990 PMCID: PMC3970626 DOI: 10.1590/0074-0276108042013007] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Leptospirosis in humans usually involves hypokalaemia and hypomagnesaemia and the putative mechanism underlying such ionic imbalances may be related to nitric oxide (NO) production. We previously demonstrated the correlation between serum levels of NO and the severity of renal disease in patients with severe leptospirosis. Methylene blue inhibits soluble guanylyl cyclase (downstream of the action of any NO synthase isoforms) and was recently reported to have beneficial effects on clinical and experimental sepsis. We investigated the occurrence of serum ionic changes in experimental leptospirosis at various time points (4, 8, 16 and 28 days) in a hamster model. We also determined the effect of methylene blue treatment when administered as an adjuvant therapy, combined with late initiation of standard antibiotic (ampicillin) treatment. Hypokalaemia was not reproduced in this model: all of the groups developed increased levels of serum potassium (K). Furthermore, hypermagnesaemia, rather than magnesium (Mg) depletion, was observed in this hamster model of acute infection. These findings may be associated with an accelerated progression to acute renal failure. Adjuvant treatment with methylene blue had no effect on survival or serum Mg and K levels during acute-phase leptospirosis in hamsters.
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Affiliation(s)
- Cleiton Silva Santos
- Centro de Pesquisa Gonçalo Moniz-Fiocruz, Salvador, BA, Brasil,Universidade Federal da Bahia, Salvador, BA, Brasil
| | | | | | | | - Andréia Carvalho dos Santos
- Centro de Pesquisa Gonçalo Moniz-Fiocruz, Salvador, BA, Brasil,Universidade Federal da Bahia, Salvador, BA, Brasil
| | | | | | | | - Mitermayer Galvão dos Reis
- Centro de Pesquisa Gonçalo Moniz-Fiocruz, Salvador, BA, Brasil,Universidade Federal da Bahia, Salvador, BA, Brasil
| | - Daniel Abensur Athanazio
- Centro de Pesquisa Gonçalo Moniz-Fiocruz, Salvador, BA, Brasil,Universidade Federal da Bahia, Salvador, BA, Brasil, Corresponding author:
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Andrade SG, Campos RF, Steindel M, Guerreiro ML, Magalhães JB, Almeida MCD, Reis JN, Santos VC, Valadares HMS, Reis MGD, Macedo AM. Biological, biochemical and molecular features of Trypanosoma cruzi strains isolated from patients infected through oral transmission during a 2005 outbreak in the state of Santa Catarina, Brazil: its correspondence with the new T. cruzi Taxonomy Consensus (2009). Mem Inst Oswaldo Cruz 2012; 106:948-56. [PMID: 22241116 DOI: 10.1590/s0074-02762011000800009] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Accepted: 09/22/2011] [Indexed: 11/22/2022] Open
Abstract
We examined strains of Trypanosoma cruzi isolated from patients with acute Chagas disease that had been acquired by oral transmission in the state of Santa Catarina, Brazil (2005) and two isolates that had been obtained from a marsupial (Didelphis aurita) and a vector (Triatoma tibiamaculata). These strains were characterised through their biological behaviour and isoenzymic profiles and genotyped according to the new Taxonomy Consensus (2009) based on the discrete typing unities, that is, T. cruzi genotypes I-VI. All strains exhibited the biological behaviour of biodeme type II. In six isolates, late peaks of parasitaemia, beyond the 20th day, suggested a double infection with biodemes II + III. Isoenzymes revealed Z2 or mixed Z1 and Z2 profiles. Genotyping was performed using three polymorphic genes (cytochrome oxidase II, spliced leader intergenic region and 24Sα rRNA) and the restriction fragment length polymorphism of the kDNA minicircles. Based on these markers, all but four isolates were characterised as T. cruzi II genotypes. Four mixed populations were identified: SC90, SC93 and SC97 (T. cruzi I + T. cruzi II) and SC95 (T. cruzi I + T. cruzi VI). Comparison of the results obtained by different methods was essential for the correct identification of the mixed populations and major lineages involved indicating that characterisation by different methods can provide new insights into the relationship between phenotypic and genotypic aspects of parasite behaviour.
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Affiliation(s)
- Sonia Gumes Andrade
- Laboratório de Chagas Experimental, Autoimunidade e Imunologia Celular, Centro de Pesquisas Gonçalo Moniz, Fiocruz, Salvador, BA, Brasil.
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Fernandes O, Pieri OS, Carvalho ODS, Reis MGD. Foreword. Mem Inst Oswaldo Cruz 2010. [DOI: 10.1590/s0074-02762010000400001] [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: 11/22/2022] Open
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Melo PRSD, Reis EAG, Ciuffo IA, Góes M, Blanton RE, Reis MGD. The dynamics of dengue virus serotype 3 introduction and dispersion in the state of Bahia, Brazil. Mem Inst Oswaldo Cruz 2008; 102:905-12. [PMID: 18209927 DOI: 10.1590/s0074-02762007000800003] [Citation(s) in RCA: 15] [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: 05/29/2007] [Accepted: 11/28/2007] [Indexed: 11/21/2022] Open
Abstract
By 2002, dengue virus serotype 1 (DENV-1) and DENV-2 had circulated for more than a decade in Brazil. In 2002, the introduction of DENV-3 in the state of Bahia produced a massive epidemic and the first cases of dengue hemorrhagic fever. Based on the standardized frequency, timing and location of viral isolations by the state's Central Laboratory, DENV-3 probably entered Bahia through its capital, Salvador, and then rapidly disseminated to other cities, following the main roads. A linear regression model that included traffic flow, distance from the capital and DENV-1 circulation (r2 = 0.24, p = 0.001) supported this hypothesis. This pattern was not seen for serotypes already in circulation and was not seen for DENV-3 in the following year. Human population density was another important factor in the intensity of viral circulation. Neither DENV-1 nor DENV-2 fit this model for 2001 or 2003. Since the vector has limited flight range and vector densities fail to correlate with intensity of viral circulation, this distribution represents the movement of infected people and to some extent mosquitoes. This pattern may mimic person-to-person spread of a new infection.
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Wanden-Berthe C, Reis MGD, Llerena A, Camino RD, Javier Miguel L. <B>La Tertulia del Programa Iberoamericano de Ciencia y Tecnología para el Desarrollo</B>. Rev Panam Salud Publica 2008; 23:218-9. [DOI: 10.1590/s1020-49892008000300014] [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: 11/21/2022] Open
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Moura Neto JPD, Dourado MV, Reis MGD, Gonçalves MS. A novel c.197T <FONT FACE=Symbol>®</FONT> A variant among Brazilian neonates with glucose-6-phosphate dehydrogenase deficiency. Genet Mol Biol 2008. [DOI: 10.1590/s1415-47572008000100006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Zarife MASA, de Oliveira ECP, Romeu JMSL, dos Reis MG. [Detection of genotype 4 of the hepatitis C virus in Salvador, BA]. Rev Soc Bras Med Trop 2007; 39:567-9. [PMID: 17308705 DOI: 10.1590/s0037-86822006000600012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2005] [Accepted: 12/05/2006] [Indexed: 12/09/2022] Open
Abstract
The first detected case of genotype 4 of the hepatitis C virus (HCV) in Salvador, Bahia, is described. RT-PCR tests were used to detect HCV-RNA, and LIPA was used for genotyping. Genotype 4 responds poorly to treatment, and it is therefore important to actively search for people who have been in contact with it.
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Silva LK, Silva MBSD, Lopes GB, Rodart IF, Costa FQ, Santana NP, Paraná R, Santana A, Reis MGD. Prevalence of hepatitis C virus infection and HCV genotypes among hemophiliacs in the State of Bahia, Northeastern Brazil: analysis of serological and virological parameters. Rev Soc Bras Med Trop 2006; 38:496-502. [PMID: 16410926 DOI: 10.1590/s0037-86822005000600010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 12/27/2022] Open
Abstract
The objective of the present study was to analyze HCV serological and virological parameters from hemophiliacs in the State of Bahia. Anti-HCV was investigated by ELISA in a cohort of 268 hemophiliacs A/B who were followed-up in a reference unit for hemotherapy in the State of Bahia. HCV viremia and genotypes were also determined from a subset of 66 anti-HCV seropositive hemophiliacs. Seroprevalence among hemophiliacs was 42.2% (95% CI 36.5-48.1) and was significantly higher (p<0.05) according to age > or =10 years, presence of factor VIII/IX inhibitory antibodies and other infection markers. None of the hemophiliacs less than 5 years of age were anti-HCV seropositive. Viremia was detectable in 77.3% (51/66). HCV genotype 1 (74%) was the most prevalent followed by genotype 3 (22%) and genotype 2 (4%). Our results indicate that HCV prevalence is still high among hemophiliacs, although HCV transmission was not observed in young hemophiliacs.
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Affiliation(s)
- Luciano Kalabric Silva
- Laboratory of Pathology and Molecular Biology, Gonçalo Moniz Research Center, Fundação Oswaldo Cruz, Salvador, BA, Brazil
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Adorno EV, Couto FD, Moura Neto JPD, Menezes JF, Rêgo M, Reis MGD, Gonçalves MS. Hemoglobinopathies in newborns from Salvador, Bahia, Northeast Brazil. CAD SAUDE PUBLICA 2005; 21:292-8. [PMID: 15692663 DOI: 10.1590/s0102-311x2005000100032] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hemoglobinopathies are hereditary disorders of the hemoglobin molecule with a high prevalence worldwide. Brazil has a prevalence of 0.1 to 0.3% of newborns with sickle cell anemia and 20.0 to 25.0% of heterozygous alpha2 thalassemia among African Brazilians. In the present study, we investigated the presence of variant hemoglobins and alpha2(3.7 Kb) and alpha2 (4.2 Kb) thalassemia in newborns from Salvador, Bahia, Brazil. Samples of umbilical cord blood from a total of 590 newborns were analyzed, of which 57 (9.8%) were FAS; 36 (6.5%) FAC; one (0.2%) SF; and five (0.9%) FSC. One hundred fourteen (22.2%) newborns had alpha2(3.7 Kb) thalassemia, of whom 101 (19.7%) were heterozygous and 13 (2.5%) homozygous, showing statistical significance for hematological data between newborns with normal alpha genes and alpha2(3.7 Kb) thalassemia carriers. The alpha2(4.2 Kb) thalassemia was not found. Frequencies found in the present study confirm that hemoglobinopathies are a public health problem in Brazil, emphasizing the need for neonatal screening and genetic counseling programs.
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Couto FD, Adorno EV, Menezes JF, Moura Neto JP, Rêgo MAV, Reis MGD, Gonçalves MS. C677T polymorphism of the MTHFR gene and variant hemoglobins: a study in newborns from Salvador, Bahia, Brazil. CAD SAUDE PUBLICA 2004; 20:529-33. [PMID: 15073633 DOI: 10.1590/s0102-311x2004000200021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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: 11/22/2022] Open
Abstract
The C677T polymorphism in the methylenetetrahydrofolate reductase gene (MTHFR) is associated with an increase in total homocysteine serum levels (tHcy), described as a risk factor for cardiovascular disease. Eight hundred forty-three neonates from two different maternity hospitals, one public and another private, in Salvador, Bahia, Brazil were screened for this polymorphism by PCR and RFLP. The T-allele frequency in the total sample was 0.23, and the prevalence rates of heterozygous and homozygous carriers were 36.2% and 5.3%, respectively. The T-allele frequency differed and the T/T genotype was more prevalent at the private maternity hospital. The hemoglobin (Hb) profile was investigated by HPLC in 763 newborns. The frequency of variant Hb was higher at the public than at the private maternity hospital. The association of the C677T polymorphism and the Hb profile was investigated in 683 newborns, showing a relatively high frequency of variant Hbs and the T allele. These data could provide an important basis for further studies focusing on potential risks of vaso-occlusive events in these individuals.
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Affiliation(s)
- Fábio David Couto
- Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, Brasil.
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Abstract
A administração de praziquantel a camundongos infectados pelo Schistosoma mansoni (50 cercarias/8 semanas) causou necrose de coagulação e/ou lítica, e por vezes calcificação dos miracídios nos tecidos a partir do 4º dia do início do tratamento. A administração conjugada de oxamniquine/hycanthone, embora muito efetiva para eliminar os vermes adultos, não teve ação sobre os miracídios no interior dos granulomas, tendo os testes de eclosão sido positivos até o 15º dia após o tratamento curativo. A ação do praziquantel sobre os ovos do S. mansoni pode ter repercussão sorológica ou patogênica, facilitando uma mais rápida reabsorção dos granulomas pelos tecidos do hospedeiro.
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