Increased Double-Positive T Cells in Chronic Chagas Disease Patients
Author Information
Author(s): Giraldo Nicolas A., Bolaños Natalia I., Cuellar Adriana, Guzman Fanny, Uribe Ana Maria, Bedoya Astrid, Olaya Natalia, Cucunubá Zulma M., Roa Nubia, Rosas Fernando, Velasco Víctor, Puerta Concepción J., González John M.
Primary Institution: Universidad de los Andes, Bogotá, Colombia
Hypothesis
The study aims to determine the frequency, phenotype, and effector potential of circulating CD4+/CD8+ double positive T cells in patients chronically infected with T. cruzi.
Conclusion
Chagasic patients have higher percentages of circulating double positive T cells expressing activation markers and greater class I antigenic specificity against T. cruzi.
Supporting Evidence
- Chagasic patients showed higher frequencies of DP T cells compared to healthy and non-chagasic cardiomyopathy donors.
- DP T cells from Chagasic patients expressed more activation markers and had higher frequencies of T. cruzi K1-specific cells.
- IFN-γ production in K1-specific cells was higher in asymptomatic patients after polyclonal stimulation.
Takeaway
People with chronic Chagas disease have more special immune cells that can fight the parasite, but these cells might not work as well in some patients.
Methodology
The study analyzed blood samples from 17 chronic chagasic patients and 24 non-infected donors, assessing T cell frequencies and activation markers using flow cytometry.
Potential Biases
Potential biases may arise from the selection of participants and the methods used for data collection.
Limitations
The study is limited by the small sample size and the specific population studied, which may not be generalizable.
Participant Demographics
The study included 17 chronic chagasic patients (13 females, 4 males) aged 36 to 67 years, and 24 non-infected donors (12 healthy and 12 with non-chagasic cardiomyopathy).
Statistical Information
P-Value
0.0017
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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