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Zingales B, Macedo AM. Fifteen Years after the Definition of Trypanosoma cruzi DTUs: What Have We Learned? Life (Basel) 2023; 13:2339. [PMID: 38137940 PMCID: PMC10744745 DOI: 10.3390/life13122339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/24/2023] Open
Abstract
Trypanosoma cruzi, the protozoan causative of Chagas disease (ChD), exhibits striking genetic and phenotypic intraspecific diversity, along with ecoepidemiological complexity. Human-pathogen interactions lead to distinct clinical presentations of ChD. In 2009, an international consensus classified T. cruzi strains into six discrete typing units (DTUs), TcI to TcVI, later including TcBat, and proposed reproducible genotyping schemes for DTU identification. This article aims to review the impact of classifying T. cruzi strains into DTUs on our understanding of biological, ecoepidemiological, and pathogenic aspects of T. cruzi. We will explore the likely origin of DTUs and the intrinsic characteristics of each group of strains concerning genome organization, genomics, and susceptibility to drugs used in ChD treatment. We will also provide an overview of the association of DTUs with mammalian reservoirs, and summarize the geographic distribution, and the clinical implications, of prevalent specific DTUs in ChD patients. Throughout this review, we will emphasize the crucial roles of both parasite and human genetics in defining ChD pathogenesis and chemotherapy outcome.
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Affiliation(s)
- Bianca Zingales
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo 05508-900, São Paulo, Brazil
| | - Andréa M. Macedo
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil;
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2
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Telleria J, Tibayrenc M, Del Salto Mendoza M, Seveno M, Costales JA. Comparative proteomic analysis of Trypanosoma cruzi TcI lineage epimastigotes unveils metabolic and phenotypic differences between fast- and slow-dividing strains. Exp Parasitol 2023; 252:108576. [PMID: 37429537 DOI: 10.1016/j.exppara.2023.108576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 06/28/2023] [Accepted: 07/03/2023] [Indexed: 07/12/2023]
Abstract
Trypanosoma cruzi, the causative agent of Chagas disease, is a genetically and phenotypically diverse species, divided into 5 main phylogenetic lineages (TcI to TcVI). TcI is the most widespread lineage in the Americas. Proteomics is a suitable tool to study the global protein expression dynamics in pathogens. Previous proteomic studies have revealed a link between (i) the genetic variability; (ii) the protein expression; and (iii) the biological characteristics of T. cruzi. Here, two-dimensional electrophoresis (2DE) and mass spectrometry were used to characterize the overall protein expression profiles of epimastigotes from four distinct TcI strains displaying different growth kinetics. Ascending hierarchical clustering analysis based on the global 2DE protein expression profiles grouped the strains under study into two clusters that were congruent with their fast or slow growth kinetics. A subset of proteins differentially expressed by the strains in each group were identified by mass spectrometry. Biological differences between the two groups, including use of glucose as an energy source, flagellum length, and metabolic activity, were predicted by proteomic analysis and confirmed by metabolic tests and microscopic measurements performed on the epimastigotes of each strain. Our results show that protein expression profiles are correlated with parasite phenotypes, which may in turn influence the parasite's virulence and transmission capacity.
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Affiliation(s)
- Jenny Telleria
- Institut de recherche pour le développement, La recherche agronomique pour le développement, 34398, Montpellier, Cedex 05, France
| | - Michel Tibayrenc
- Maladies Infectieuses et Vecteurs Ecologie, Génétique, Evolution et Contrôle, Institut de Recherche pour le Développement, Centre National de la Recherche Scientifique/UM1-UM2, 34394, Montpellier, Cedex 5, France
| | - Michelle Del Salto Mendoza
- Centro de Investigación para la Salud en América Latina, Escuela de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador
| | - Martial Seveno
- BCM, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Jaime A Costales
- Centro de Investigación para la Salud en América Latina, Escuela de Ciencias Biológicas, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Católica del Ecuador, Quito, Ecuador.
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3
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Majeau A, Cloherty E, Anderson AN, Straif-Bourgeois SC, Dumonteil E, Herrera C. Genetic diversity of Trypanosoma cruzi infecting raccoons ( Procyon lotor) in 2 metropolitan areas of southern Louisiana: implications for parasite transmission networks. Parasitology 2023; 150:1-8. [PMID: 36788672 PMCID: PMC10090583 DOI: 10.1017/s0031182023000070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/11/2023] [Accepted: 01/11/2023] [Indexed: 01/21/2023]
Abstract
Trypanosoma cruzi, the aetiological agent of Chagas disease, exists as an anthropozoonosis in Louisiana. Raccoons are an important reservoir, as they demonstrate high prevalence and maintain high parasitaemia longer than other mammals. Given the complex nature of parasite transmission networks and importance of raccoons as reservoirs that move between sylvatic and domestic environments, detailing the genetic diversity of T. cruzi in raccoons is crucial to assess risk to human health. Using a next-generation sequencing approach targeting the mini-exon, parasite diversity was assessed in 2 metropolitan areas of Louisiana. Sequences were analysed along with those previously identified in other mammals and vectors to determine if any association exists between ecoregion and parasite diversity. Parasites were identified from discrete typing units (DTUs) TcI, TcII, TcIV, TcV and TcVI. DTUs TcII, TcV and TcVI are previously unreported in raccoons in the United States (US). TcI was the most abundant DTU, comprising nearly 80% of all sequences. All but 1 raccoon harboured multiple haplotypes, some demonstrating mixed infections of different DTUs. Furthermore, there is significant association between DTU distribution and level III ecoregion in Louisiana. Finally, while certain sequences were distributed across multiple tissues, others appeared to have tissue-specific tropism. Taken together, these findings indicate that ongoing surveillance of T. cruzi in the US should be undertaken across ecoregions to fully assess risk to human health. Given potential connections between parasite diversity and clinical outcomes, deep sequencing technologies are crucial and interventions targeting raccoons may prove useful in mitigating human health risk.
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Affiliation(s)
- Alicia Majeau
- Tulane University School of Public Health & Tropical Medicine, New Orleans, LA, USA
| | - Erin Cloherty
- New Orleans Mosquito, Rodent, and Termite Control, New Orleans, LA, USA
| | - A. Nikki Anderson
- Louisiana Department of Wildlife and Fisheries, Baton Rouge, LA, USA
| | | | - Eric Dumonteil
- Tulane University School of Public Health & Tropical Medicine, New Orleans, LA, USA
| | - Claudia Herrera
- Tulane University School of Public Health & Tropical Medicine, New Orleans, LA, USA
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4
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Velásquez-Ortiz N, Herrera G, Hernández C, Muñoz M, Ramírez JD. Discrete typing units of Trypanosoma cruzi: Geographical and biological distribution in the Americas. Sci Data 2022; 9:360. [PMID: 35750679 PMCID: PMC9232490 DOI: 10.1038/s41597-022-01452-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 05/19/2022] [Indexed: 11/09/2022] Open
Abstract
Chagas disease caused by Trypanosoma cruzi is a public health issue in Latin America. This highly diverse parasite is divided into at least seven discrete typing units (DTUs) TcI-TcVI and Tcbat. Some DTUs have been associated with geographical distribution in epidemiological scenarios and clinical manifestations, but these aspects remain poorly understood. Many studies have focused on studying the parasite and its vectors/hosts, using a wide variety of genetic markers and methods. Here, we performed a systematic review of the literature for the last 20 years to present an update of DTUs distribution in the Americas, collecting ecoepidemiological information. We found that the DTUs are widespread across the continent and that there is a whole gamma of genetic markers used for the identification and genotyping of the parasite. The data obtained in this descriptor could improve the molecular epidemiology studies of Chagas disease in endemic regions. Measurement(s) | Genotype | Technology Type(s) | Report from Literature |
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Affiliation(s)
- Natalia Velásquez-Ortiz
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Giovanny Herrera
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Carolina Hernández
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia.,Centro de Tecnología en Salud (CETESA), Innovaseq SAS, Bogotá, Colombia
| | - Marina Muñoz
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia
| | - Juan David Ramírez
- Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia. .,Molecular Microbiology Laboratory, Department of Pathology, Molecular and Cell-based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
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Kratz JM, Gonçalves KR, Romera LM, Moraes CB, Bittencourt-Cunha P, Schenkman S, Chatelain E, Sosa-Estani S. The translational challenge in Chagas disease drug development. Mem Inst Oswaldo Cruz 2022; 117:e200501. [PMID: 35613156 PMCID: PMC9128742 DOI: 10.1590/0074-02760200501] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 01/13/2021] [Indexed: 12/20/2022] Open
Abstract
Chagas disease is a neglected tropical disease caused by the protozoan parasite Trypanosoma cruzi. There is an urgent need for safe, effective, and accessible new treatments since the currently approved drugs have serious limitations. Drug development for Chagas disease has historically been hampered by the complexity of the disease, critical knowledge gaps, and lack of coordinated R&D efforts. This review covers some of the translational challenges associated with the progression of new chemical entities from preclinical to clinical phases of development, and discusses how recent technological advances might allow the research community to answer key questions relevant to the disease and to overcome hurdles in R&D for Chagas disease.
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Affiliation(s)
- Jadel M Kratz
- Drugs for Neglected Diseases initiative, Geneva, Switzerland
| | - Karolina R Gonçalves
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, São Paulo, SP, Brasil
| | - Lavínia Md Romera
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, São Paulo, SP, Brasil
| | - Carolina Borsoi Moraes
- Universidade Federal de São Paulo, Departamento de Ciências Farmacêuticas, Diadema, SP, Brasil
| | - Paula Bittencourt-Cunha
- Universidade de São Paulo, Instituto de Ciências Biomédicas, Departamento de Microbiologia, São Paulo, SP, Brasil.,Universidade Federal de São Paulo, Departamento de Microbiologia, Imunologia e Parasitologia, São Paulo, SP, Brasil
| | - Sergio Schenkman
- Universidade Federal de São Paulo, Departamento de Microbiologia, Imunologia e Parasitologia, São Paulo, SP, Brasil
| | - Eric Chatelain
- Drugs for Neglected Diseases initiative, Geneva, Switzerland
| | - Sergio Sosa-Estani
- Drugs for Neglected Diseases initiative, Geneva, Switzerland.,Epidemiology and Public Health Research Centre, CIESP-CONICET, Buenos Aires, Argentina
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6
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Fleitas PE, Floridia-Yapur N, Nieves EE, Echazu A, Vargas PA, Caro NR, Aveldaño R, Lopez W, Fernandez M, Crudo F, Cimino RO, Krolewiecki AJ. Strongyloides stercoralis and Trypanosoma cruzi coinfections in a highly endemic area in Argentina. PLoS Negl Trop Dis 2022; 16:e0010179. [PMID: 35120117 PMCID: PMC8865657 DOI: 10.1371/journal.pntd.0010179] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 02/23/2022] [Accepted: 01/19/2022] [Indexed: 11/18/2022] Open
Abstract
Background Strongyloidiasis and Chagas disease are endemic in northern Argentina. In this study we evaluate the association between S. stercoralis and T. cruzi infections in villages with diverse prevalence levels for these parasites. Further understanding in the relationship between these Neglected Tropical Diseases of South America is relevant for the design of integrated control measures as well as exploring potential biologic interactions. Methodology Community based cross-sectional studies were carried in different villages of the Chaco and Yungas regions in Argentina. Individuals were diagnosed by serology for S. stercoralis and T. cruzi. The association between S. stercoralis and T. cruzi, and between anemia and the two parasites was evaluated using two approaches: marginal (Ma) and multilevel regression (Mu). Results A total of 706 individuals from six villages of northern Argentina were included. A total of 37% were positive for S. stercoralis, 14% were positive for T. cruzi and 5% were positive for both. No association was found between infection with S. stercoralis and T. cruzi in any of the models, but we found a negative correlation between the prevalence of these species in the different villages (r = -0.91). Adults (> 15 years) presented association with S. stercoralis (Ma OR = 2.72; Mu OR = 2.84) and T. cruzi (Ma OR = 5.12; Mu OR = 5.48). Also, 12% and 2% of the variance of infection with S. stercoralis and T. cruzi, respectively, could be explained by differences among villages. On the other hand, anemia was associated with infection with S. stercoralis (Ma OR = 1.73; Mu OR = 1.78) and was more prevalent in adults (Ma OR = 2.59; Mu OR = 2.69). Conclusion We found that coinfection between S. stercoralis and T. cruzi is not more frequent than chance in endemic areas. However, the high prevalence for both parasites, raises the need for an integrated strategy for the control of STH and Chagas disease. Infections with S. stercoralis and T. cruzi belong to the group of neglected tropical diseases (NTDs). NTDs are influenced by climate and the presence of their vectors and host reservoirs in areas with structural poverty. S. stercoralis and T. cruzi have high prevalence in northern Argentina. Due to the high prevalence and chronicity of infections by these parasites, coinfection with both is possible. We conducted a cross sectional study in six villages in the north of Argentina. These villages have different prevalence for the two parasites and are located in different ecoregions (Chaco, Yungas and the border between these two). We found that coinfection between S. stercoralis and T. cruzi occurs only by chance; and the most affected groups for S. stercoralis and T. cruzi infection are adults. We also found that adults or individual with infection with S. stercoralis were more likely to have anemia. In addition, each village represents a different setting for infection with S. stercoralis and T. cruzi, and individuals in different villages presented differences in the probability of infection.
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Affiliation(s)
- Pedro E Fleitas
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
- Universidad Nacional de Salta, Facultad de Ciencias Naturales, Cátedra de Química Biológica, Salta, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Noelia Floridia-Yapur
- Universidad Nacional de Salta, Facultad de Ciencias Naturales, Cátedra de Química Biológica, Salta, Argentina
- Instituto de Patología Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Salta, Argentina
| | - Elvia E Nieves
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
| | - Adriana Echazu
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
- Universidad Nacional de Salta, Facultad de Ciencias de la Salud, Cátedra de Parasitología, Salta, Argentina
| | - Paola A Vargas
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
- Biotecnología, Universidad Católica de Boliviana San Pablo, Santa Cruz, Bolivia
| | - Nicolás R Caro
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
| | - Ramiro Aveldaño
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
| | - Walter Lopez
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
| | - Mariana Fernandez
- Asociación para el Desarrollo Sanitario Regional (ADESAR), San Antonio de Areco, Buenos Aires, Argentina
- Fundación Mundo Sano, Buenos Aires, Argentina
| | - Favio Crudo
- Asociación para el Desarrollo Sanitario Regional (ADESAR), San Antonio de Areco, Buenos Aires, Argentina
- Fundación Mundo Sano, Buenos Aires, Argentina
- Universidad Nacional de San Antonio de Areco, San Antonio de Areco, Buenos Aires, Argentina
| | - Rubén O Cimino
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
- Universidad Nacional de Salta, Facultad de Ciencias Naturales, Cátedra de Química Biológica, Salta, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alejandro J Krolewiecki
- Universidad Nacional de Salta. Sede Regional Orán. Instituto de Investigación de Enfermedades Tropicales (IIET), Salta, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
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Strauss M, Lo Presti MS, Ramírez JC, Bazán PC, Velázquez López DA, Báez AL, Paglini PA, Schijman AG, Rivarola HW. Differential tissue distribution of discrete typing units after drug combination therapy in experimental Trypanosoma cruzi mixed infection. Parasitology 2021; 148:1595-1601. [PMID: 35060468 PMCID: PMC11010057 DOI: 10.1017/s0031182021001281] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 06/15/2021] [Accepted: 07/12/2021] [Indexed: 11/06/2022]
Abstract
The aim of the present work was to evaluate the distribution of the different clones of the parasite prevailing after treatment with benznidazole (BZ) and clomipramine (CLO), in mice infected with Trypanosoma cruzi, Casibla isolate which consists of a mixture of two discrete typing units (DTUs). Albino Swiss mice were infected and treated with high and low concentrations of BZ (100 or 6.25 mg/kg), CLO (5 or 1.25 mg/kg), or the combination of both low doses (BZ6.25 + CLO1.25), during the acute phase of experimental infection. Treatment efficacy was evaluated by comparing parasitaemia, survival and tissular parasite presence. For DTUs genotyping, blood, skeletal and cardiac muscle samples were analysed by multiplex quantitative polymerase chain reaction. The combined treatment had similar outcomes to BZ6.25; BZ100 was the most effective treatment, but it failed to reach parasite clearance and produced greater histological alterations. Non-treated mice and the ones treated with monotherapies showed both DTUs while BZ6.25 + CLO1.25 treated mice showed only TcVI parasites in all the tissues studied. These findings suggest that the treatment may modify the distribution of infecting DTUs in host tissues. Coinfection with T. cruzi clones belonging to different DTUs reveals a complex scenario for the treatment of Chagas disease and search for new therapies.
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Affiliation(s)
- Mariana Strauss
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - M. Silvina Lo Presti
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - Juan C. Ramírez
- Laboratorio de Biología Molecular de la Enfermedad de Chagas (LaBMECh), Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Vuelta de Obligado 2490, C1428ADN Buenos Aires, Argentina
| | - P. Carolina Bazán
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - Daniela A. Velázquez López
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - Alejandra L. Báez
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - Patricia A. Paglini
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
| | - Alejandro G. Schijman
- Laboratorio de Biología Molecular de la Enfermedad de Chagas (LaBMECh), Instituto de Investigaciones en Ingeniería Genética y Biología Molecular “Dr. Héctor N. Torres” (INGEBI-CONICET), Vuelta de Obligado 2490, C1428ADN Buenos Aires, Argentina
| | - Héctor W. Rivarola
- Instituto de Investigaciones en Ciencias de la Salud (INICSA) UNC-CONICET, Centro de Estudios e Investigación de la Enfermedad de Chagas y Leishmaniasis, Facultad de Ciencias Médicas, Universidad Nacional de Córdoba, Santa Rosa 1085, X5000ESU-Córdoba, Argentina
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8
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González-Rete B, Gutiérrez-Cabrera AE, de Fuentes-Vicente JA, Salazar-Schettino PM, Cabrera-Bravo M, Córdoba-Aguilar A. Higher temperatures reduce the number of Trypanosoma cruzi parasites in the vector Triatoma pallidipennis. Parasit Vectors 2021; 14:385. [PMID: 34348795 PMCID: PMC8336246 DOI: 10.1186/s13071-021-04872-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/07/2021] [Indexed: 11/10/2022] Open
Abstract
Background Relatively little is known about how pathogens transmitted by vector insects are affected by changing temperatures analogous to those occurring in the present global warming scenario. One expectation is that, like their ectothermic vectors, an increase in temperature could reduce their fitness. Here, we have investigated the effect of high temperatures on the abundance of Trypanosoma cruzi parasites during infection in the vector Triatoma pallidipennis. Methods We exposed T. pallidipennis nymphs to two strains (Morelos and Chilpancingo) of T. cruzi. Once infected, the fifth-instar bugs were distributed among three different temperature groups, i.e. 20, 30, and 34 °C, and the resulting parasites were counted when the bugs reached adulthood. Results The number of parasites increased linearly with time at 20 °C and, to a lesser extent, at 30 °C, especially in the Chilpancingo compared to the Morelos strain. Conversely, at 34 °C, the number of parasites of both strains decreased significantly compared to the other two temperatures. Conclusions These results suggest negative effects on the abundance of T. cruzi in T. pallidipennis at high temperatures. This is the first evidence of the effect of high temperatures on a pathogenic agent transmitted by an insect vector in the context of global warming. Further tests should be done to determine whether this pattern occurs with other triatomine species and T. cruzi strains. Graphical abstract ![]()
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Affiliation(s)
- Berenice González-Rete
- Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.,Departamento de Microbiología Y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Ana E Gutiérrez-Cabrera
- CONACYT-Centro de Investigación Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Morelos, Mexico
| | | | - Paz María Salazar-Schettino
- Departamento de Microbiología Y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Margarita Cabrera-Bravo
- Departamento de Microbiología Y Parasitología, Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.
| | - Alex Córdoba-Aguilar
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, Coyoacán, Ciudad de México, Mexico.
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9
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Nielebock MAP, Moreira OC, Xavier SCDC, Miranda LDFC, de Lima ACB, Pereira TODJS, Hasslocher-Moreno AM, Britto C, Sangenis LHC, Saraiva RM. Association between Trypanosoma cruzi DTU TcII and chronic Chagas disease clinical presentation and outcome in an urban cohort in Brazil. PLoS One 2020; 15:e0243008. [PMID: 33264350 PMCID: PMC7710061 DOI: 10.1371/journal.pone.0243008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 11/12/2020] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND The specific roles of parasite characteristics and immunological factors of the host in Chagas disease progression and prognosis are still under debate. Trypanosoma cruzi genotype may be an important determinant of the clinical chronic Chagas disease form and prognosis. This study aimed to identify the potential association between T. cruzi genotypes and the clinical presentations of chronic Chagas disease. METHODOLOGY/PRINCIPAL FINDINGS This is a retrospective study using T. cruzi isolated from blood culture samples of 43 patients with chronic Chagas disease. From 43 patients, 42 were born in Brazil, mainly in Southeast and Northeast Brazilian regions, and one patient was born in Bolivia. Their mean age at the time of blood collection was 52.4±13.2 years. The clinical presentation was as follows 51.1% cardiac form, 25.6% indeterminate form, and 23.3% cardiodigestive form. Discrete typing unit (DTU) was determined by multilocus conventional PCR. TcII (n = 40) and TcVI (n = 2) were the DTUs identified. DTU was unidentifiable in one patient. The average follow-up time after blood culture was 5.7±4.4 years. A total of 14 patients (32.5%) died and one patient underwent heart transplantation. The cause of death was sudden cardiac arrest in six patients, heart failure in five patients, not related to Chagas disease in one patient, and ignored in two patients. A total of 8 patients (18.6%) progressed, all of them within the cardiac or cardiodigestive forms. CONCLUSIONS/SIGNIFICANCE TcII was the main T. cruzi DTU identified in chronic Chagas disease Brazilian patients (92.9%) with either cardiac, indeterminate or cardiodigestive forms, born at Southeast and Northeast regions. Other DTU found in much less frequency was TcVI (4.8%). TcII was also associated to patients that evolved with heart failure or sudden cardiac arrest, the two most common and ominous consequences of the cardiac form of Chagas disease.
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Affiliation(s)
- Marco Antonio Prates Nielebock
- Clinical Research Laboratory in Chagas Disease, Evandro Chagas National Institute of Infectious Diseases, Fiocruz, Rio de Janeiro, Brazil
| | - Otacílio C. Moreira
- Molecular Biology and Endemic Diseases Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | | | | | | | | | - Alejandro Marcel Hasslocher-Moreno
- Clinical Research Laboratory in Chagas Disease, Evandro Chagas National Institute of Infectious Diseases, Fiocruz, Rio de Janeiro, Brazil
| | - Constança Britto
- Molecular Biology and Endemic Diseases Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Luiz Henrique Conde Sangenis
- Clinical Research Laboratory in Chagas Disease, Evandro Chagas National Institute of Infectious Diseases, Fiocruz, Rio de Janeiro, Brazil
| | - Roberto Magalhães Saraiva
- Clinical Research Laboratory in Chagas Disease, Evandro Chagas National Institute of Infectious Diseases, Fiocruz, Rio de Janeiro, Brazil
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