The Role of TNF-alpha in Chagas Disease
Author Information
Author(s): Cristina Wide Pissetti, Dalmo Correia, Rafael Faria de Oliveira, MaurÃcio Manoel Llaguno, Marly Aparecida Spadotto Balarin, Roseane Lopes Silva-Grecco, Virmondes Rodrigues Jr
Primary Institution: Universidade Federal do Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
Hypothesis
This study investigates whether TNF-alpha levels and the presence of genetic polymorphisms are associated with T. cruzi infection and the development of cardiac form in chronic chagasic patients.
Conclusion
The study suggests that the TNF-238A allele influences susceptibility to T. cruzi infection and is associated with higher TNF-alpha production in seropositive individuals.
Supporting Evidence
- TNF-alpha levels were significantly higher in patients with the indeterminate form than in cardiac patients.
- Seronegative individuals produced higher levels of TNF-alpha than seropositive subjects without stimulation.
- The absence of the TNF-238A allele was more frequent among seronegative individuals.
Takeaway
This study found that a specific gene variation can affect how the body responds to a parasite that causes Chagas disease, which can lead to heart problems.
Methodology
The study involved 300 individuals from an endemic area, analyzing TNF-alpha levels and genetic polymorphisms through PCR and ELISA.
Potential Biases
Potential bias due to the exclusion of HIV-seropositive individuals and the homogeneity of the study population.
Limitations
The study's sample size for certain analyses was small, which may limit the statistical power of the findings.
Participant Demographics
Participants were unrelated individuals aged 25 years or older from an endemic area in Brazil, with a mean age of 51.2 years.
Statistical Information
P-Value
p=0.04, p=0.007, p=0.004
Confidence Interval
1.057 to 3.223
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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