Evaluation of TcH2AF-R and S35-S36 primers in PCR tests for the detection of Trypanosoma cruzi in mouse cardiac tissue

Concepción Judith Puerta, Johana María Guevara, Paula Ximena Pavía, Marleny Montilla, Rubén Santiago Nicholls, Edgar Parra, Yuli Katherine Barrera, .

Keywords: Trypanosoma cruzi, Chagas disease, Chagas cardiomyopathy, polymerase chain reaction

Abstract

Introduction. Heart transplant is a therapeutic option in the treatment of chagasic cardiomyopathy. For early detection of Chagas reactivation cases, the use of PCR tests using endomyocardial biopsies has been proposed. Development of an animal model will be the first step in evaluating the applicability of this approach.
Objective. PCR tests based on the TcH2AF-R and S35-S36 primers were evaluated for the detection of T. cruzi in heart tissue of mice experimentally infected with the parasite.
Materials and methods. Two groups of ICR mice of 15 and 10 individuals were infected by intraperitoneal injection with 0.3 ml of PBS containing 1x106 trypomastigotes of the MHOM/CO/ 2001/D.A. (T. cruzi I) strain or 1x104 trypomastigotes of MHOM/BR/00/Y (T. cruzi II) strain. Parasitemia and cardiac parasitic infection were determined at 30, 60 (acute model), 100 and 150 (chronic model) days by means of histopathological examination and by PCR, using the TcH2AF-R and S35-S36 primers.
Results. The histopathological findings revealed alterations in the heart and the presence of intracellular amastigotes in acute and chronic models. In contrast to parasitemia levels and histopathological analyses, S35-S36 PCR detected infections in mice that were infected with either parasite strain. TcH2AF-R PCR detected T. cruzi I-infected mice earlier and more frequently than inspection for parasitemia or histopathological examination. Conclusions. Applying PCR tests with both primers proved superior for Chagas disease confirmation over currently standard detection methods.

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  • Concepción Judith Puerta Laboratorio de Parasitología Molecular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
  • Johana María Guevara Laboratorio de Parasitología Molecular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
  • Paula Ximena Pavía Laboratorio de Parasitología Molecular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
  • Marleny Montilla Grupo de Parasitología, Subdirección de Investigación, Instituto Nacional de Salud, Bogotá, D.C., Colombia
  • Rubén Santiago Nicholls Grupo de Parasitología, Subdirección de Investigación, Instituto Nacional de Salud, Bogotá, D.C., Colombia
  • Edgar Parra Laboratorio de Patología, Subdirección Red Nacional de Laboratorios, Instituto Nacional de Salud, Bogotá, D.C., Colombia.
  • Yuli Katherine Barrera Laboratorio de Parasitología Molecular, Departamento de Microbiología, Facultad de Ciencias, Pontificia Universidad Javeriana, Bogotá, D.C., Colombia

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How to Cite
1.
Puerta CJ, Guevara JM, Pavía PX, Montilla M, Nicholls RS, Parra E, et al. Evaluation of TcH2AF-R and S35-S36 primers in PCR tests for the detection of Trypanosoma cruzi in mouse cardiac tissue. biomedica [Internet]. 2008 Dec. 1 [cited 2024 May 10];28(4):616-2. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/68

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