Immune Responses to Erp Protein in Tuberculosis Patients and Healthy Individuals
Author Information
Author(s): Martinez Valérie, Carcelain Guislaine, Badell Edgar, Jouan Marc, Mauger Isabelle, Sellier Pierre, Truffot Chantal, Bricaire François, Arend Sandra M, Ottenhoff Tom, Autran Brigitte, Gicquel Brigitte
Primary Institution: Laboratoire d'Immunologie Cellulaire, INSERM U543, Hôpital Pitié-Salpêtrière, Paris, France
Hypothesis
Can the immune responses to the Erp protein help differentiate between tuberculosis disease and latent infection?
Conclusion
LTBI subjects show higher immune responses to the Erp protein compared to TB patients, suggesting its potential use in distinguishing between latent TB infection and active disease.
Supporting Evidence
- Erp-specific T cell counts were higher in LTBI than in TB patients.
- LTBI subjects produced IgG3 against Erp, while TB patients did not.
- Responses to PPD and ESAT-6 did not differ significantly between TB patients and LTBI subjects.
Takeaway
This study found that people with latent TB infection have stronger immune responses to a specific protein from the tuberculosis bacteria than those who are sick with TB.
Methodology
The study analyzed immune responses to the Erp protein in TB patients and healthy individuals using various assays including lymphoproliferation and ELISpot IFN-γ.
Limitations
The study is limited by its small sample size and the need for further validation in larger cohorts.
Participant Demographics
The study included 22 TB patients (17 men, 5 women) and 23 healthy individuals (16 BCG+ and 7 BCG-), with a median age of 38 years for TB patients.
Statistical Information
P-Value
0.019
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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