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Role of mitochondria on Trypanosoma cruzi survival treated with H2O2 concentration that induce DNA damage

Grant number: 12/21594-3
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): February 01, 2013
Effective date (End): July 31, 2014
Field of knowledge:Biological Sciences - Biochemistry - Metabolism and Bioenergetics
Principal Investigator:Fernanda Ramos Gadelha
Grantee:Tamires Marco Antonio
Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


Trypanosoma cruzi is the causative agent of Chagas disease, a debilitating illness that affects about 8-10 million people in Latin America having a considerable economic and social impact. T. cruzi epimastigotes have to deal with the reactive oxygen species (ROS) in the invertebrate host intestinal tract derived from the degradation of hemoglobin that generates high levels of heme. The excess of ROS could have deleterious effects to cells since these ROS can oxidize several molecules such as lipids, carbohydrates, proteins and nucleic acids. In DNA, the action of ROS can cause single- and double-strand breaks (SSBs and DSBs, respectively), base excision and oxidation. Like most living organisms, T. cruzi is susceptible to oxidative stress, hence DNA repair is essential for its survival and establishment of the infection. T. cruzi has only one mitochondrion and nowadays, it is clear that it has an important role besides the production of ATP. It is the source of signaling molecules, such as ROS and its integrity is essential for parasite survival. In this research project, the extension to which the mitochondrion contributes to parasite survival (different strains) under H2O2 treatment will be covered. These results will deepen our knowledge regarding the strategies used by T. cruzi for its survival under oxidative stress conditions and will allow the identification of new targets that could lead to the development of a more specific therapy.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ANTONIO SALGADO MARTINS, TAMIRES MARCO; PELOSO, EDUARDO DE FIGUEIREDO; COSTA-SILVA, HELLIDA MARINA; RAJAO, MATHEUS ANDRADE; VAN HOUTEN, BENNET; MACHADO, CARLOS RENATO; GADELHA, FERNANDA RAMOS. Mitochondrial behavior during nuclear and mitochondrial DNA repair in Trypanosoma cruzi epimastigotes. Experimental Parasitology, v. 219, . (12/21594-3)

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