Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load
Background: The study evaluated qualitative PCR, primers 121-122 as a tool to follow up evolution parasite load of Trypanosoma cruzi. Methods: The study was conducted at the State University of Maringa, in 2015. Step 1, dilutions 1/10 were performed from T. cruzi-Y strain to obtain preparations of...
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doaj-47675688016d4c82b491251973ce2cea2021-04-02T12:16:15ZengTehran University of Medical SciencesIranian Journal of Parasitology1735-70202008-238X2016-12-01113607Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite LoadFabiana Nabarro FERRAZ0Denise Lessa ALEIXO1Ana Paula GRUENDLING2Mônica Lúcia GOMES3Max Jean de Ornelas TOLEDO4Silvana Marques DE ARAÚJO5Dept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, BrazilDept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, BrazilDept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, BrazilDept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, BrazilDept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, BrazilDept. of Basic Health Sciences, Sector of Parasitology, State University of Maringa, Maringa, Brazil Background: The study evaluated qualitative PCR, primers 121-122 as a tool to follow up evolution parasite load of Trypanosoma cruzi. Methods: The study was conducted at the State University of Maringa, in 2015. Step 1, dilutions 1/10 were performed from T. cruzi-Y strain to obtain preparations of 50,000-0.05 parasites/mL from which DNA were extracted, quantified, and amplified. Step 2, the extracted DNA in the dilutions 5-0.05 parasites/mL was re-diluted 1/10, 1/100, 1/1000, quantified, and amplified. Polyacrylamide gels were photographed and thicknesses of the 330 bp kDNA fragments were measured. Results: Step 1, in the dilutions 50,000-50 parasites/mL kDNA fragments had same thickness and, dilutions 5-0.05 parasites/mL showed progressive decrease in thicknesses and staining intensity of the 330 bp fragments. Step 2, demonstrated that dilutions of five (re-dilutions 1/10 and 1/100) and 0.5 (1/10) parasites/mL produced similar thicknesses of the 330 bp fragments obtained in Step 1. However, very dilute DNA samples make difficult to reproduce the fragments thicknesses. Conclusion: PCR, despite its limitations, was able to detect progressive decrease in thicknesses/staining intensity of kDNA fragments in the dilutions 5-0.05 parasites/mL. Hence, has the potential to be used to follow-up evolution of parasite load, not by quantifying the number of parasites, but by dynamic evolution of the fragments thicknesses during etiological treatment.https://ijpa.tums.ac.ir/index.php/ijpa/article/view/1219Trypanosoma cruziParasite loadPCRkDNA fragments |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fabiana Nabarro FERRAZ Denise Lessa ALEIXO Ana Paula GRUENDLING Mônica Lúcia GOMES Max Jean de Ornelas TOLEDO Silvana Marques DE ARAÚJO |
spellingShingle |
Fabiana Nabarro FERRAZ Denise Lessa ALEIXO Ana Paula GRUENDLING Mônica Lúcia GOMES Max Jean de Ornelas TOLEDO Silvana Marques DE ARAÚJO Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load Iranian Journal of Parasitology Trypanosoma cruzi Parasite load PCR kDNA fragments |
author_facet |
Fabiana Nabarro FERRAZ Denise Lessa ALEIXO Ana Paula GRUENDLING Mônica Lúcia GOMES Max Jean de Ornelas TOLEDO Silvana Marques DE ARAÚJO |
author_sort |
Fabiana Nabarro FERRAZ |
title |
Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load |
title_short |
Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load |
title_full |
Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load |
title_fullStr |
Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load |
title_full_unstemmed |
Trypanosoma cruzi: Evaluation of PCR as a Laboratory Tool to Follow up the Evolution of Parasite Load |
title_sort |
trypanosoma cruzi: evaluation of pcr as a laboratory tool to follow up the evolution of parasite load |
publisher |
Tehran University of Medical Sciences |
series |
Iranian Journal of Parasitology |
issn |
1735-7020 2008-238X |
publishDate |
2016-12-01 |
description |
Background: The study evaluated qualitative PCR, primers 121-122 as a tool to follow up evolution parasite load of Trypanosoma cruzi.
Methods: The study was conducted at the State University of Maringa, in 2015. Step 1, dilutions 1/10 were performed from T. cruzi-Y strain to obtain preparations of 50,000-0.05 parasites/mL from which DNA were extracted, quantified, and amplified. Step 2, the extracted DNA in the dilutions 5-0.05 parasites/mL was re-diluted 1/10, 1/100, 1/1000, quantified, and amplified. Polyacrylamide gels were photographed and thicknesses of the 330 bp kDNA fragments were measured.
Results: Step 1, in the dilutions 50,000-50 parasites/mL kDNA fragments had same thickness and, dilutions 5-0.05 parasites/mL showed progressive decrease in thicknesses and staining intensity of the 330 bp fragments. Step 2, demonstrated that dilutions of five (re-dilutions 1/10 and 1/100) and 0.5 (1/10) parasites/mL produced similar thicknesses of the 330 bp fragments obtained in Step 1. However, very dilute DNA samples make difficult to reproduce the fragments thicknesses.
Conclusion: PCR, despite its limitations, was able to detect progressive decrease in thicknesses/staining intensity of kDNA fragments in the dilutions 5-0.05 parasites/mL. Hence, has the potential to be used to follow-up evolution of parasite load, not by quantifying the number of parasites, but by dynamic evolution of the fragments thicknesses during etiological treatment. |
topic |
Trypanosoma cruzi Parasite load PCR kDNA fragments |
url |
https://ijpa.tums.ac.ir/index.php/ijpa/article/view/1219 |
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