Single nucleotide polymorphisms of cytokine-related genes and association with clinical outcome in a Chagas disease case-control study from Brazil.
Mem Inst Oswaldo Cruz
; 113(6): e170489, 2018 May 14.
Article
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| MEDLINE
| ID: mdl-29768622
ABSTRACT
BACKGROUND:
The severity of chronic chagasic cardiomyopathy (CCC), the most frequent clinical outcome of Chagas disease (CD), has been associated with cytokine-enriched heart tissue inflammation, and high serum levels of transforming growth factor (TGFß), interferon-gamma (IFNγ), and tumour necrosis factor (TNF). Conversely, increased interleukin (IL)-10 serum concentrations have been associated with asymptomatic CD. Cytokines and cytokine-related gene polymorphisms may control cytokine expression and have been proposed to contribute to CCC outcomes.OBJECTIVES:
We evaluated the association of 13 cytokine-related genes (TGFB rs8179181, rs8105161, rs1800469; IL10 rs1800890, rs1800871, rs1800896; IFNG rs2430561; TNF rs1800629; BAT1 rs3853601; LTA rs909253, rs2239704; TNFR1 rs767455; TNFR2 rs1061624) with risk and progression of CCC.FINDINGS:
Four hundred and six seropositive patients from CD endemic areas in the state of Pernambuco, north-eastern Brazil, were classified as non-cardiopathic (A, 110) or cardiopathic (mild, B1, 163; severe, C, 133). We found no evidence of TGFB, IL10, TNF, or TNFR1/2 gene polymorphisms associated with CCC risk or progression. Only BAT1 rs3853601 -22G carriers (B1 vs. C OR = 0.5; p-value = 0.03) and IFNG rs2430561 +874AT (A vs. C OR = 0.7; p-value = 0.03; A vs. B1+C OR = 0.8; p-value = 0.02) showed a significant association with protection from cardiopathy in a logistic regression analysis with adjustment for gender and ethnicity; however, the association disappeared after performing adjustment for multiple testing. A systematic review of TNF rs1800629 -308G>A publications included five studies for meta-analysis (534 CCC and 472 asymptomatic patients) and showed no consensus in pooled odds ratio (OR) estimates for A allele or A carriers (OR = 1.4 and 1.5; p-values = 0.14 and 0.15, respectively). In CD patients, TNF serum levels were increased, but not affected by the TNF rs1800629 -308A allele. MAINCONCLUSIONS:
Our data suggest no significant contribution of the analysed gene variants of cytokine-related molecules to development/severity of Chagas' heart disease, reinforcing the idea that parasite/host interplay is critical to CD outcomes.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Cardiomiopatía Chagásica
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Citocinas
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Polimorfismo de Nucleótido Simple
Tipo de estudio:
Observational_studies
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Prognostic_studies
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Risk_factors_studies
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Systematic_reviews
Límite:
Female
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Humans
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Male
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Middle aged
País/Región como asunto:
America do sul
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Brasil
Idioma:
En
Revista:
Mem Inst Oswaldo Cruz
Año:
2018
Tipo del documento:
Article
País de afiliación:
Brasil