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Selenium supplementation at low doses contributes to the decrease in heart damage in experimental Trypanosoma cruzi
Andréa P de Souza1, Gabriel Melo de Oliveira, Jean Vanderpas
1Laboratório de Biologia Celular, Departamento de Ultra-estrutura e Biologia Celular, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Av Brasil 4365, Manguinhos, 21045-900 Rio de Janeiro, RJ, Brazil.
Parasitology Research
|July 29, 2003
Summary
Selenium (Se) supplementation may protect the heart from Chagas disease damage. Higher doses reduced parasite levels in mice, but only moderate Se levels lessened cardiac inflammation, suggesting a targeted protective effect.
Area of Science:
- Biochemistry
- Parasitology
- Cardiology
Background:
- Chagasic cardiomyopathy is linked to low selenium (Se) levels.
- Selenium is an essential trace element with potential antioxidant and anti-inflammatory roles.
Purpose of the Study:
- To investigate the impact of varying selenium (Se) supplementation doses on Trypanosoma cruzi infection and cardiac damage in a mouse model.
Main Methods:
- Mice infected with T. cruzi were supplemented with Se at concentrations ranging from 0.25 to 16 ppm.
- Parasitemia, survival rates, and cardiac damage markers (creatine kinase) were assessed.
Main Results:
- Selenium (Se) supplementation at 4-16 ppm reduced parasitemia in a dose-dependent manner, with the highest concentration showing significant effects.
- In vitro studies indicated direct lysis of T. cruzi parasites upon incubation with Se.
- Supplementation with 4 ppm Se significantly reduced cardiac damage, evidenced by lower levels of the cardiac isoform of creatine kinase, without altering survival rates.
Conclusions:
- Selenium (Se) supplementation does not offer general protection against T. cruzi infection but may mitigate cardiac inflammatory damage.
- The efficacy of Se in T. cruzi infection is dependent on the specific host-parasite interaction.