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Lopes PDS, Ramos ELP, Gómez-Hernández C, Ferreira GLS, Rezende-Oliveira K. PREVALENCE OF CHAGAS DISEASE AMONG BLOOD DONOR CANDIDATES IN TRIANGULO MINEIRO, MINAS GERAIS STATE, BRAZIL. Rev Inst Med Trop Sao Paulo 2016; 57:461-5. [PMID: 27049698 PMCID: PMC4727130 DOI: 10.1590/s0036-46652015000600001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 04/06/2015] [Indexed: 11/22/2022] Open
Abstract
Despite public health campaigns and epidemiological surveillance activities, Chagas
disease remains a major health problem in Latin America. According to data from the
World Health Organization, there are approximately 7-8 million people infected with
Trypanosoma cruzi worldwide, a large percentage of which in Latin
America. This study aims to examine the serological profile of blood donors in blood
banks of Hemominas hematology center, in the town of Ituiutaba, Minas Gerais State,
Brazil. The study sample consisted of 53,941 blood donors, which were grouped
according to gender and age. Sample collections were performed from January 1991 to
December 2011, and 277 donors (0.5%) were considered serologically ineligible due to
Chagas disease. Analysis of data showed no significant difference between genders. As
for age, the highest proportion of ineligible donors was from 40 to 49 years (30%),
and there was a positive correlation between increasing age and the percentage of
patients seropositive for Chagas disease. Therefore, adopting strategies that allow
the safe identification of donors with positive serology for Chagas disease is
essential to reduce or eliminate indeterminate serological results.
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Affiliation(s)
- Patrícia da Silva Lopes
- Faculdade de Ciências Integradas do Pontal, Universidade Federal de Uberlândia, Ituiutaba, MG, Brasil
| | - Eliezer Lucas Pires Ramos
- Faculdade de Ciências Integradas do Pontal, Universidade Federal de Uberlândia, Ituiutaba, MG, Brasil
| | | | | | - Karine Rezende-Oliveira
- Faculdade de Ciências Integradas do Pontal, Universidade Federal de Uberlândia, Ituiutaba, MG, Brasil
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Ferreira LRP, Frade AF, Santos RHB, Teixeira PC, Baron MA, Navarro IC, Benvenuti LA, Fiorelli AI, Bocchi EA, Stolf NA, Chevillard C, Kalil J, Cunha-Neto E. MicroRNAs miR-1, miR-133a, miR-133b, miR-208a and miR-208b are dysregulated in Chronic Chagas disease Cardiomyopathy. Int J Cardiol 2014; 175:409-17. [PMID: 24910366 DOI: 10.1016/j.ijcard.2014.05.019] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Revised: 04/25/2014] [Accepted: 05/11/2014] [Indexed: 12/25/2022]
Abstract
BACKGROUND/METHODS Chagas disease is caused by an intracellular parasite, Trypanosoma cruzi, and it is a leading cause of heart failure in Latin America. The main clinical consequence of the infection is the development of a Chronic Chagas disease Cardiomyopathy (CCC), which is characterized by myocarditis, hypertrophy and fibrosis and affects about 30% of infected patients. CCC has a worse prognosis than other cardiomyopathies, like idiopathic dilated cardiomyopathy (DCM). It is well established that myocardial gene expression patterns are altered in CCC, but the molecular mechanisms underlying these differences are not clear. MicroRNAs are recently discovered regulators of gene expression, and are recognized as important factors in heart development and cardiovascular disorders (CD). We analyzed the expression of nine different miRNAs in myocardial tissue samples of CCC patients in comparison to DCM patients and samples from heart transplant donors. Using the results of a cDNA microarray database on CCC and DCM myocardium, signaling networks were built and nodal molecules were identified. RESULTS We observed that five miRNAs were significantly altered in CCC and three in DCM; importantly, three miRNAs were significantly reduced in CCC as compared to DCM. We observed that multiple gene targets of the differentially expressed miRNAs showed a concordant inverse expression in CCC. Significantly, most gene targets and involved networks belong to crucial disease-related signaling pathways. CONCLUSION These results suggest that miRNAs may play a major role in the regulation of gene expression in CCC pathogenesis, with potential implication as diagnostic and prognostic tools.
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Affiliation(s)
- Ludmila Rodrigues Pinto Ferreira
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | - Amanda Farage Frade
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | | | - Priscila Camillo Teixeira
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | - Monique Andrade Baron
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | - Isabela Cunha Navarro
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | - Luiz Alberto Benvenuti
- Division of Pathology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil
| | - Alfredo Inácio Fiorelli
- Division of Surgery, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil
| | - Edimar Alcides Bocchi
- Division of Surgery, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil
| | - Noedir Antonio Stolf
- Division of Surgery, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil
| | | | - Jorge Kalil
- Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil
| | - Edecio Cunha-Neto
- Laboratory of Immunology, Heart Institute (InCor), University of São Paulo, School of Medicine, São Paulo, Brazil; Division of Clinical Immunology and Allergy, University of São Paulo, School of Medicine, São Paulo, Brazil; Institute for Investigation in Immunology (iii), INCT, 05403-001, São Paulo, Brazil..
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