Polymorphisms in genes affecting interferon-γ production and Th1 T cell differentiation are associated with progression to Chagas Disease cardiomyopathy
Front. immunol
; 11(1386): 1-12, July., 2020. tab.
Article
in English
| Sec. Est. Saúde SP, SESSP-IDPCPROD, Sec. Est. Saúde SP
| ID: biblio-1122895
Responsible library:
BR79.1
Localization: BR79.1
ABSTRACT
BACKGROUND:
Chagas disease, caused by the protozoan Trypanosoma cruzi, is endemic in Latin America. Thirty percent of infected individuals develop chronic Chagas cardiomyopathy (CCC), an inflammatory dilated cardiomyopathy that is the most important clinical consequence of T. cruzi infection, while the others remain asymptomatic (ASY). IFN-γ and IFN-γ-producing Th1-type T cells are increased in peripheral blood and CCC myocardium as compared to ASY patients, while the Th1-antagonizing cytokine IL-10 is more expressed in ASY patients. Importantly IFN-γ-producing Th1-type T cells are the most frequent cytokine-producing T cell subset in CCC myocardium, while expression of Th1-antagonizing cytokines IL-10 and IL-4 is unaltered. The control of IFN-γ production by Th1-type T cells may be a key event for progression toward CCC. A genetic component to disease progression was suggested by the familial aggregation of cases and the association of gene polymorphisms with CCC development. We here investigate the role of gene polymorphisms (SNPs) in several genes involved in the control of IFN-γ production and Th1 T cell differentiation in CCC development.METHODS:
We studied a Brazilian population including 315 CCC cases and 118 ASY subjects. We assessed 35 Tag SNPs designed to represent all the genetic information contained in the IL12B, IL10, IFNG, and IL4 genes.RESULTS:
We found 2 IL12 SNPs (rs2546893, rs919766) and a trend of association for a IL10 SNP (rs3024496) to be significantly associated with the ASY group. these associations were confirmed by multivariate analysis and allele tests. The rs919766C 12rs2546893G, and rs3024496C alleles were associated to an increase risk to CCC development.CONCLUSIONS:
Our data show that novel polymorphisms affecting IL12B and IL10, but not IFNG or IL4 genes play a role in genetic susceptibility to CCC development. This might indicate that the increased Th1 differentiation and IFN-γ production associated with CCC is genetically controlled.
Full text:
Available
Collection:
National databases
/
Brazil
Health context:
SDG3 - Health and Well-Being
/
Neglected Diseases
Health problem:
Target 3.3: End transmission of communicable diseases
/
Chagas Disease
/
Neglected Diseases
Database:
Sec. Est. Saúde SP
/
SESSP-IDPCPROD
Main subject:
Chagas Disease
/
Interleukin-12
/
Cardiomyopathies
Type of study:
Risk factors
Language:
English
Journal:
Front. immunol
Year:
2020
Document type:
Article
Institution/Affiliation country:
INSERM Universidade Aix-Marseille/FR
/
Instituto de Cardiologia Dante Pazzanese (IDPC)/BR
/
University of São Paulo (USP)/BR
/
University of São Paulo School of Medicine (FMUSP)/BR
/
University of São Paulo/BR
/
Wide Universidade Federal Do Triângulo Mineiro (UFTM)/BR