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Eiras AE, Pires SF, Staunton KM, Paixão KS, Resende MC, Silva HA, Rocha IG, Oliveira BA, Peres AM, Drumond BP, Ritchie SA. A high-risk Zika and dengue transmission hub: virus detections in mosquitoes at a Brazilian university campus. Parasit Vectors 2018; 11:359. [PMID: 29929561 PMCID: PMC6014031 DOI: 10.1186/s13071-018-2883-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Accepted: 05/01/2018] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Zika virus (ZIKV) and dengue virus (DENV) are mosquito-borne flaviviruses prevalent throughout tropical regions. Currently, management of ZIKV and DENV centers on control of the primary vector Aedes aegypti. This vector is highly anthropophilic and is therefore prevalent throughout densely urbanised landscapes. A new passive trap for gravid Ae. aegypti (Gravid Aedes Trap - GAT) was developed for mosquito surveillance. Here the different killing agents and the level of transmission of arboviruses that may occur in mosquitoes sampled by GATs are assessed for the first time. METHODS Gravid Aedes traps (GATs) were deployed at the Federal University of Minas Gerais campus, in Belo Horizonte, Brazil to sample Ae. aegypti. Three different killing agents were evaluated within the GATs: sticky cards, long-lasting insecticide-impregnated nets (LLINs) and canola oil. Traps were monitored weekly for 14 weeks then mosquito specimens were identified to the species level and Ae. aegypti catches were pooled and submitted to qRT-PCR assays for to DENV and ZIKV virus detection, followed by Bayesian phylogenetic analysis of the ZIKV. Additionally, comparisons of means were performed on transformed weekly catch data (P = 0.05, t-tests) with the stats package of the R statistical software. RESULTS In total, 1506 female Ae. aegypti were captured using GATs, with traps using sticky cards catching more mosquito than those using either LLINs or canola oil. Both ZIKV and DENV were detected in Ae. aegypti females captured over several weeks suggesting that this highly populated university campus may have served as a significant transmission hub. The infection rate for ZIKV was present in seven (8.5%) pools from four weeks while DENV was detected in four (4.9%) pools from four weeks. Phylogenetic analysis of ZIKV classified the strain as Asian genotype. CONCLUSIONS The Federal University of Minas Gerais and similar organizations must strongly consider monitoring Ae. aegypti populations and reinforcing personal protection of staff and students during seasons of high mosquito activity.
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Affiliation(s)
- Alvaro E. Eiras
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Simone F. Pires
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Kyran M. Staunton
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Cairns, Australia
- Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Australia
| | - Kelly S. Paixão
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Marcelo C. Resende
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Hilcielly A. Silva
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Isadora G. Rocha
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Bruna A. Oliveira
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Anderson M. Peres
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Betânia P. Drumond
- Department of Microbiology, Laboratório de Vírus, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Scott A. Ritchie
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Cairns, Australia
- Australian Institute of Tropical Health and Medicine, James Cook University, Cairns, Australia
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Ribeiro LP, Freitas-Lima LC, Naumann GB, Meyrelles SS, Lunz W, Pires SF, Andrade HM, Carnielli JBT, Figueiredo SG. Cardiac protein expression patterns are associated with distinct inborn exercise capacity in non-selectively bred rats. ACTA ACUST UNITED AC 2018; 51:e7033. [PMID: 29340527 PMCID: PMC5769761 DOI: 10.1590/1414-431x20177033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 10/26/2017] [Indexed: 01/27/2023]
Abstract
In the present study, we successfully demonstrated for the first time the existence of cardiac proteomic differences between non-selectively bred rats with distinct intrinsic exercise capacities. A proteomic approach based on two-dimensional gel electrophoresis coupled to mass spectrometry was used to study the left ventricle (LV) tissue proteome of rats with distinct intrinsic exercise capacity. Low running performance (LRP) and high running performance (HRP) rats were categorized by a treadmill exercise test, according to distance run to exhaustion. The running capacity of HRPs was 3.5-fold greater than LRPs. Protein profiling revealed 29 differences between HRP and LRP rats (15 proteins were identified). We detected alterations in components involved in metabolism, antioxidant and stress response, microfibrillar and cytoskeletal proteins. Contractile proteins were upregulated in the LVs of HRP rats (α-myosin heavy chain-6, myosin light chain-1 and creatine kinase), whereas the LVs of LRP rats exhibited upregulation in proteins associated with stress response (aldehyde dehydrogenase 2, α-crystallin B chain and HSPβ-2). In addition, the cytoskeletal proteins desmin and α-actin were upregulated in LRPs. Taken together, our results suggest that the increased contractile protein levels in HRP rats partly accounted for their improved exercise capacity, and that proteins considered risk factors to the development of cardiovascular disease were expressed in higher amounts in LRP animals.
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Affiliation(s)
- L P Ribeiro
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - L C Freitas-Lima
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - G B Naumann
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil.,Diretoria de Pesquisa e Desenvolvimento, Fundação Ezequiel Dias, Belo Horizonte, MG, Brasil
| | - S S Meyrelles
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - W Lunz
- Centro de Educação Física e Desportos, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - S F Pires
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - H M Andrade
- Departamento de Parasitologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
| | - J B T Carnielli
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil.,Núcleo de Doenças Infecciosas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
| | - S G Figueiredo
- Departamento de Ciências Fisiológicas, Universidade Federal do Espírito Santo, Vitória, ES, Brasil
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Lima BSS, Pires SF, Fialho LC, Oliveira EJ, Machado-de-Avila RA, Chávez-Olórtegui C, Chapeaurouge AD, Perales J, Andrade HM. A proteomic road to acquire an accurate serological diagnosis for human tegumentary leishmaniasis. J Proteomics 2016; 151:174-181. [PMID: 27262223 DOI: 10.1016/j.jprot.2016.05.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 05/02/2016] [Accepted: 05/17/2016] [Indexed: 11/26/2022]
Abstract
Diagnostic tools are important for clinical management and epidemiological evaluation of Tegumentary (TL) and Visceral (VL) Leishmaniasis. Serology is not frequently used for the diagnosis of the TL form because low antibody titers and cross-reaction with VL. Therefore, it is crucial to identify specific and immunogenic antigens from species associated with the TL form. Here we employed a proteomic approach coupled to an in silico analysis and identified the most abundant and immunogenic proteins from Leishmania amazonensis, Leishmania braziliensis and Leishmania infantum. Of 16 species specific proteins, nine were from the species causative of the TL form (L. amazonensis and L. braziliensis). In silico analysis revealed 18 B-cell epitopes with 0% similarity to Trypanosoma cruzi orthologs and, therefore, less likely to crossreact with sera of patients with Chagas disease. Two proteins reacted exclusively with serum from TL patients and presented several B-cell epitopes without similarity to T. cruzi orthologs: the hypothetical protein GI 134063939 and the metallo-peptidase Clan MA(E)-Family M3. The immunoassay revealed nine peptides with strong reactivity to sera from TL patients. These proteins and peptides may be good candidates to improve the specificity and sensibility of serological tests aiming to diagnose the TL of this neglected human disease. BIOLOGICAL SIGNIFICANCE As no gold-standard test for tegumentary leishmaniasis (TL) exists, a combination of different diagnostic techniques is often necessary to obtain precise results. Thus, the identification of species-specific, highly immunogenic and abundant proteins that stimulate the humoral immune response in the host should help in the development of serological tests for human TL. Herein we searched for these potential antigens in Leishmania species related to American Leishmaniasis (L. amazonensis, L. braziliensis and L. infantum). To this end, we employed an immunoproteomic approach using proteins from these Leishmania species and sera from TL and Visceral Leishmaniasis (VL) patients. Our study unveils specific proteins and peptides that may represent antigens that will help the efforts to improve the accuracy of serological tests to diagnose the TL form.
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Affiliation(s)
- B S S Lima
- Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais, CP: 486 - CEP: 31.270-901, Belo Horizonte, Minas Gerais, Brazil
| | - S F Pires
- Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais, CP: 486 - CEP: 31.270-901, Belo Horizonte, Minas Gerais, Brazil
| | - L C Fialho
- Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais, CP: 486 - CEP: 31.270-901, Belo Horizonte, Minas Gerais, Brazil
| | - E J Oliveira
- Laboratório de Pesquisas Clínicas, Centro de Pesquisas René Rachou, CP: 1742 - CEP: 30190-002 Belo Horizonte, Minas Gerais, Brazil
| | - R A Machado-de-Avila
- Unidade Acadêmica de Ciências da Saúde, Universidade do Extremo Sul Catarinense, CEP: 88.806-000 Criciúma, Santa Catarina, Brazil
| | - C Chávez-Olórtegui
- Departamento Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, CP: 486 - CEP: 31.270-901, Belo Horizonte, Minas Gerais, Brazil
| | - A D Chapeaurouge
- Laboratório de Toxinologia, Instituto Oswaldo Cruz, Fiocruz, CEP: 21040-360, Rio de Janeiro, Brazil
| | - J Perales
- Laboratório de Toxinologia, Instituto Oswaldo Cruz, Fiocruz, CEP: 21040-360, Rio de Janeiro, Brazil
| | - H M Andrade
- Departamento de Parasitologia, ICB, Universidade Federal de Minas Gerais, CP: 486 - CEP: 31.270-901, Belo Horizonte, Minas Gerais, Brazil.
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Lima BSS, Fialho LC, Pires SF, Tafuri WL, Andrade HM. Immunoproteomic and bioinformatic approaches to identify secreted Leishmania amazonensis, L. braziliensis, and L. infantum proteins with specific reactivity using canine serum. Vet Parasitol 2016; 223:115-9. [PMID: 27198787 DOI: 10.1016/j.vetpar.2016.04.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 03/21/2016] [Accepted: 04/18/2016] [Indexed: 10/21/2022]
Abstract
Leishmania spp have a wide range of hosts, and each host can harbor several Leishmania species. Dogs, for example, are frequently infected by Leishmania infantum, where they constitute its main reservoir, but they also serve as hosts for L. braziliensis and L. amazonensis. Serological tests for antibody detection are valuable tools for diagnosis of L. infantum infection due to the high levels of antibodies induced, unlike what is observed in L. amazonensis and L. braziliensis infections. Likewise, serology-based antigen-detection can be useful as an approach to diagnose any Leishmania species infection using different corporal fluid samples. Immunogenic and secreted proteins constitute powerful targets for diagnostic methods in antigen detection. As such, we performed immunoproteomic (2-DE, western blot and mass spectrometry) and bioinformatic screening to search for reactive and secreted proteins from L. amazonensis, L. braziliensis, and L. infantum. Twenty-eight non-redundant proteins were identified, among which, six were reactive only in L. amazonensis extracts, 10 in L. braziliensis extracts, and seven in L. infantum extracts. After bioinformatic analysis, seven proteins were predicted to be secreted, two of which were reactive only in L. amazonensis extracts (52kDa PDI and the glucose-regulated protein 78), one in L. braziliensis extracts (pyruvate dehydrogenase E1 beta subunit) and three in L. infantum extracts (two conserved hypothetical proteins and elongation factor 1-beta). We propose that proteins can be suitable targets for diagnostic methods based on antigen detection.
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Affiliation(s)
- B S S Lima
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brazil.
| | - L C Fialho
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brazil.
| | - S F Pires
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brazil.
| | - W L Tafuri
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Patologia, 31279-910 Belo Horizonte, Minas Gerais, Brazil.
| | - H M Andrade
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brazil.
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5
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Mol JPS, Pires SF, Chapeaurouge AD, Perales J, Santos RL, Andrade HM, Lage AP. Proteomic Profile of Brucella abortus-Infected Bovine Chorioallantoic Membrane Explants. PLoS One 2016; 11:e0154209. [PMID: 27104343 PMCID: PMC4841507 DOI: 10.1371/journal.pone.0154209] [Citation(s) in RCA: 7] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/11/2016] [Indexed: 12/20/2022] Open
Abstract
Brucella abortus is the etiological agent of bovine brucellosis, a zoonotic disease that causes significant economic losses worldwide. The differential proteomic profile of bovine chorioallantoic membrane (CAM) explants at early stages of infection with B. abortus (0.5, 2, 4, and 8 h) was determined. Analysis of CAM explants at 0.5 and 4 h showed the highest differences between uninfected and infected CAM explants, and therefore were used for the Differential Gel Electrophoresis (DIGE). A total of 103 spots were present in only one experimental group and were selected for identification by mass spectrometry (MALDI/ToF-ToF). Proteins only identified in extracts of CAM explants infected with B. abortus were related to recognition of PAMPs by TLR, production of reactive oxygen species, intracellular trafficking, and inflammation.
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Affiliation(s)
- Juliana P. S. Mol
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Medicina Veterinária Preventiva, Belo Horizonte, Minas Gerais, Brazil
| | - Simone F. Pires
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, Belo Horizonte, Minas Gerais, Brazil
| | - Alexander D. Chapeaurouge
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxinologia, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Jonas Perales
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Toxinologia, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renato L. Santos
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Clínica e Cirurgia Veterinárias, Minas Gerais, Brasil
| | - Hélida M. Andrade
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, Belo Horizonte, Minas Gerais, Brazil
| | - Andrey P. Lage
- Universidade Federal de Minas Gerais, Escola de Veterinária, Departamento de Medicina Veterinária Preventiva, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
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Silva TMA, Mol JPS, Winter MG, Atluri V, Xavier MN, Pires SF, Paixão TA, Andrade HM, Santos RL, Tsolis RM. The predicted ABC transporter AbcEDCBA is required for type IV secretion system expression and lysosomal evasion by Brucella ovis. PLoS One 2014; 9:e114532. [PMID: 25474545 PMCID: PMC4256435 DOI: 10.1371/journal.pone.0114532] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 11/10/2014] [Indexed: 12/23/2022] Open
Abstract
Brucella ovis is a major cause of reproductive failure in rams and it is one of the few well-described Brucella species that is not zoonotic. Previous work showed that a B. ovis mutant lacking a species-specific ABC transporter (ΔabcBA) was attenuated in mice and was unable to survive in macrophages. The aim of this study was to evaluate the role of this ABC transporter during intracellular survival of B. ovis. In HeLa cells, B. ovis WT was able to survive and replicate at later time point (48 hpi), whereas an ΔabcBA mutant was attenuated at 24 hpi. The reduced survival of the ΔabcBA mutant was associated with a decreased ability to exclude the lysosomal marker LAMP1 from its vacuolar membrane, suggesting a failure to establish a replicative niche. The ΔabcBA mutant showed a reduced abundance of the Type IV secretion system (T4SS) proteins VirB8 and VirB11 in both rich and acid media, when compared to WT B. ovis. However, mRNA levels of virB1, virB8, hutC, and vjbR were similar in both strains. These results support the notion that the ABC transporter encoded by abcEDCBA or its transported substrate acts at a post-transcriptional level to promote the optimal expression of the B. ovis T4SS within infected host cells.
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Affiliation(s)
- Teane M. A. Silva
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Juliana P. S. Mol
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Maria G. Winter
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Vidya Atluri
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Mariana N. Xavier
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
| | - Simone F. Pires
- Departamento de Parasitologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Hélida M. Andrade
- Departamento de Parasitologia, Instituto de Ciências Biológicas da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinária, Escola de Veterinária da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail: (RLS); (RMT)
| | - Renee M. Tsolis
- Department of Medical Microbiology and Immunology, University of California Davis, Davis, California, United States of America
- * E-mail: (RLS); (RMT)
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Costa MM, Andrade HM, Bartholomeu DC, Freitas LM, Pires SF, Chapeaurouge AD, Perales J, Ferreira AT, Giusta MS, Melo MN, Gazzinelli RT. Analysis of Leishmania chagasi by 2-D Difference Gel Eletrophoresis (2-D DIGE) and Immunoproteomic: Identification of Novel Candidate Antigens for Diagnostic Tests and Vaccine. J Proteome Res 2011; 10:2172-84. [DOI: 10.1021/pr101286y] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Míriam M. Costa
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, 31270-910 Belo Horizonte, Minas Gerais, Brasil
| | - Hélida M. Andrade
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brasil
| | - Daniella C. Bartholomeu
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brasil
| | - Leandro M. Freitas
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brasil
| | - Simone F. Pires
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brasil
| | - Alexander D. Chapeaurouge
- Fundação Oswaldo Cruz, Instituto Oswaldo cruz, Laboratório de Toxinologia, 21040360 Rio de Janeiro, Rio de Janeiro, Brasil
| | - Jonas Perales
- Fundação Oswaldo Cruz, Instituto Oswaldo cruz, Laboratório de Toxinologia, 21040360 Rio de Janeiro, Rio de Janeiro, Brasil
| | - André T. Ferreira
- Fundação Oswaldo Cruz, Instituto Oswaldo cruz, Laboratório de Toxinologia, 21040360 Rio de Janeiro, Rio de Janeiro, Brasil
| | - Mário S. Giusta
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, 31270-910 Belo Horizonte, Minas Gerais, Brasil
| | - Maria N. Melo
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Parasitologia, 31279-910 Belo Horizonte, Minas Gerais, Brasil
| | - Ricardo T. Gazzinelli
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Departamento de Bioquímica e Imunologia, 31270-910 Belo Horizonte, Minas Gerais, Brasil
- Centro de Pesquisas René Rachou−Fundação Oswaldo Cruz, 30190-002 Belo Horizonte, Minas Gerais, Brasil
- University of Massachusetts Medical School, Division of Infectious Diseases and Immunology, Worcester 01605-2324, Massachusetts, United States
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8
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Freitas JM, Andrade LO, Pires SF, Lima R, Chiari E, Santos RR, Soares M, Machado CR, Franco GR, Pena SDJ, Macedo AM. The MHC gene region of murine hosts influences the differential tissue tropism of infecting Trypanosoma cruzi strains. PLoS One 2009; 4:e5113. [PMID: 19337367 PMCID: PMC2659742 DOI: 10.1371/journal.pone.0005113] [Citation(s) in RCA: 25] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2008] [Accepted: 03/04/2009] [Indexed: 11/25/2022] Open
Abstract
We have previously demonstrated that both parasite genetic variability and host genetic background were important in determining the differential tissue distribution of the Col1.7G2 and JG T. cruzi monoclonal strains after artificial infections in mice. We observed that the JG strain was most prevalent in hearts of mouse lineages with the MHC haplotype H-2d (BALB/c and DBA2), while Col1.7G2 was predominant in hearts from C57BL/6 mice, which have the H-2b haplotype. To assess whether the MHC gene region indeed influenced tissue tropism of T. cruzi, we used the same two parasite strains to infect C57BL/6 (H-2b) and C57BLKS/J (H-2d) mice; the latter strain results from the introgression of DBA2 MHC region into the C57BL/6 background. We also performed ex vivo infections of cardiac explants from four congenic mice lineages with the H-2b and H-2d haplotypes arranged in two different genetic backgrounds: C57BLKS/J (H-2d) versus C57BL/6 (H-2b) and BALB/c (H-2d) versus BALB/B10-H2b (H-2b). In agreement with our former observations, Col1.7G2 was predominant in hearts from C57BL/6 mice (H-2b), but we observed a clear predominance of the JG strain in hearts from C57BLKS/J animals (H-2d). In the ex vivo experiments Col1.7G2 also prevailed in explants from H-2b animals while no predominance of any of the strains was observed in H-2d mice explants, regardless of the genetic background. These observations clearly demonstrate that the MHC region influences the differential tissue distribution pattern of infecting T. cruzi strains, which by its turn may be in a human infection the determinant for the clinical forms of the Chagas disease.
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Affiliation(s)
- Jorge M. Freitas
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Luciana O. Andrade
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- * E-mail:
| | - Simone F. Pires
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ricardo Lima
- Centro de pesquisas Gonçalo Moniz - CPqGM, Salvador Bahia, Brazil
| | - Egler Chiari
- Departamento de Parasitologia , Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | | | - Milena Soares
- Centro de pesquisas Gonçalo Moniz - CPqGM, Salvador Bahia, Brazil
| | - Carlos R. Machado
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Gloria R. Franco
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio D. J. Pena
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Andrea M. Macedo
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Pires SF, DaRocha WD, Freitas JM, Oliveira LA, Kitten GT, Machado CR, Pena SDJ, Chiari E, Macedo AM, Teixeira SMR. Cell culture and animal infection with distinct Trypanosoma cruzi strains expressing red and green fluorescent proteins. Int J Parasitol 2008; 38:289-97. [PMID: 17967460 DOI: 10.1016/j.ijpara.2007.08.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 08/07/2007] [Accepted: 08/14/2007] [Indexed: 10/22/2022]
Abstract
Different strains of Trypanosoma cruzi were transfected with an expression vector that allows the integration of green fluorescent protein (GFP) and red fluorescent protein (RFP) genes into the beta-tubulin locus by homologous recombination. The sites of integration of the GFP and RFP markers were determined by pulse-field gel electrophoresis and Southern blot analyses. Cloned cell lines selected from transfected epimastigote populations maintained high levels of fluorescent protein expression even after 6 months of in vitro culture of epimastigotes in the absence of drug selection. Fluorescent trypomastigotes and amastigotes were observed within Vero cells in culture as well as in hearts and diaphragms of infected mice. The infectivity of the GFP- and RFP-expressing parasites in tissue culture cells was comparable to wild type populations. Furthermore, GFP- and RFP-expressing parasites were able to produce similar levels of parasitemia in mice compared with wild type parasites. Cell cultures infected simultaneously with two cloned cell lines from the same parasite strain, each one expressing a distinct fluorescent marker, showed that at least two different parasites are able to infect the same cell. Double-infected cells were also detected when GFP- and RFP-expressing parasites were derived from strains belonging to two distinct T. cruzi lineages. These results show the usefulness of parasites expressing GFP and RFP for the study of various aspects of T. cruzi infection including the mechanisms of cell invasion, genetic exchange among parasites and the differential tissue distribution in animal models of Chagas disease.
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Affiliation(s)
- S F Pires
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas - UFMG, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil
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DaRocha WD, Silva RA, Bartholomeu DC, Pires SF, Freitas JM, Macedo AM, Vazquez MP, Levin MJ, Teixeira SMR. Expression of exogenous genes in Trypanosoma cruzi: improving vectors and electroporation protocols. Parasitol Res 2004; 92:113-20. [PMID: 14634799 DOI: 10.1007/s00436-003-1004-5] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2003] [Accepted: 03/30/2003] [Indexed: 10/26/2022]
Abstract
To improve transfection efficiency in Trypanosoma cruzi, we developed a new electroporation protocol and expression vectors which use luciferase and green and red fluorescent proteins as reporter genes. In transient transfections, the electroporation conditions reported here resulted in luciferase expression 100 times higher than the levels obtained with previously described protocols. To verify whether sequences containing different trans-splicing signals influence reporter gene expression, we compared DNA fragments corresponding to 5' untranslated plus intergenic (5' UTR plus Ig) regions from GAPDH, TcP2beta, alpha- and beta- tubulin and amastin genes. Vectors containing sequences derived from the first four genes presented similar efficiencies and resulted in luciferase expression in transiently transfected epimastigotes that was up to 10 times higher than that for a control vector. In contrast, the amastin 5' UTR plus Ig resulted in lower levels of reporter gene expression. We also constructed a vector containing an expression cassette designed to be targeted to the tubulin locus of the parasite.
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Affiliation(s)
- Wanderson D DaRocha
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, MG 31270-010, Belo Horizonte, Brazil
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