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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/13834
Tipo: Artigo de Periódico
Título: Correlation between polymorphisms at interleukin-6 but not at interleukin-10 promoter and the risk of human T lymphotropic virus type I-associated myelopathy/tropical spastic paraparesis in Brazilian individuals
Título(s) alternativo(s): Journal of Medical Virology
Autor(es): Gadelha, Sandra Rocha
Alcântara, Luiz Carlos Júnior
Costa, Gisele Calazans
Acosta, Angelina Xavier
Rios, Domingos
Kashima, Simone
Covas, Dimas Tadeu
Castro, Bernardo Galvão
Autor(es): Gadelha, Sandra Rocha
Alcântara, Luiz Carlos Júnior
Costa, Gisele Calazans
Acosta, Angelina Xavier
Rios, Domingos
Kashima, Simone
Covas, Dimas Tadeu
Castro, Bernardo Galvão
Abstract: HTLV-1 is the etiologic agent of ATL and HAM/TSP. The majority of HTLV-1-infected individuals remain asymptomatic, indicating that the infection alone is not sufficient to cause the diseases. It has been reported that cytokine gene polymorphisms, including polymorphisms at IL-6 and IL-10 gene, might be important. We analyzed SNP in the promoter region of the IL-6: −174, −572, −597, and −634 positions, and IL-10: −592 position to evaluate the role of these polymorphisms in the HAM/TSP pathogenesis in 133 HTLV-1 infected individuals and in 100 healthy individuals from Salvador, Bahia, Brazil. The −634C allele frequencies were higher among HAM/TSP patients (21.2%) than among oligosymptomatic (6.5%; P = 0.038) and asymptomatic (9.5%; P = 0.025) subjects. Similarly, the −174G allele frequencies were higher in HAM/TSP patients than in oligosymptomatic patients (P = 0.02). Moreover, the −634GC/−174GG genotype combination was identified at a higher frequency (38.5%) in the HAM/TSP patients than in subjects with other clinical status (8.7%; P = 0.016 for oligosymptomatic and 15.5%, P = 0.012 for asymptomatic patients). However, the multivariate logistic regression including the genotypes of the three studied loci showed that only −634 C IL-6 carriers remain as significant and independent TSP/HAM predictor (odds ratio [OR] = 5.31; 95% [CI] = 1.60–17.56; P = 0.006). We suggest that −634 G C in IL-6 could contribute to HAM/TSP development and that identification of the collective influence of several cytokine polymorphisms, their prevalence, and their interaction could help to better understand this disease.
Palavras-chave: HTLV-1
Interleukin-6
Interleukin-10
Polymorphisms
Brazilian populations
Tipo de Acesso: Acesso Aberto
URI: http://repositorio.ufba.br/ri/handle/ri/13834
Data do documento: 2008
Aparece nas coleções:Artigo Publicado em Periódico (Faculdade de Medicina)

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