Interleukin-6 gene polymorphism (−174 G/C) is associated with toxoplasmic retinochoroiditis
Autor: | Antônio Lúcio Teixeira, Thais Fontes Bessa, Lucy H. Young, Wesley Ribeiro Campos, Paula Rocha Moreira, Fernando Oréfice, Germano C. Costa, Walderez O. Dutra, Cynthia A. Cordeiro |
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Rok vydání: | 2013 |
Předmět: |
Adult
Male Genotype Locus (genetics) Biology Polymerase Chain Reaction law.invention Gene Frequency law medicine Animals Humans Allele Toxoplasmosis Ocular Allele frequency Alleles Polymerase chain reaction Polymorphism Genetic Interleukin-6 DNA General Medicine medicine.disease Toxoplasmosis Ophthalmology Restriction enzyme Chorioretinitis Immunology Electrophoresis Polyacrylamide Gel Female Gene polymorphism Follow-Up Studies |
Zdroj: | Acta Ophthalmologica. 91:e311-e314 |
ISSN: | 1755-375X |
DOI: | 10.1111/aos.12046 |
Popis: | Purpose: Experimental data have demonstrated a relevant role for IL-6 in the modulation of acute ocular toxoplasmosis. Therefore, we aim to investigate the possible association between the IL-6 gene polymorphism at position -174 and toxoplasmic retinochoroiditis (TR) in humans. Methods: Ninety-seven patients with diagnosed TR were recruited from the Uveitis Section, Federal University of Minas Gerais. For comparison, 83 healthy blood donors with positive serology for toxoplasmosis and without retinal signs of previous TR were included in the study. Genomic DNA was obtained from oral swabs of individuals and amplified using polymerase chain reaction (PCR) with specific primers flanking the locus −174 of IL-6 (−174G/C). PCR products were submitted to restriction endonuclease digestion and analysed by polyacrylamide gel electrophoresis to distinguish allele G and C of the IL-6 gene, allowing the detection of the polymorphism and determination of genotypes. Results: There was a significant difference in the genotype (χ2 = 12.9, p = 0.001) and allele (χ2 = 6.62, p = 0.01) distribution between TR patients and control subjects. In a subgroup analysis, there was no significant difference in genotypes and allele frequencies regarding TR recurrence. Conclusions: This study suggests that the genotypes related with a lower production of IL-6 may be associated with the occurrence of TR. |
Databáze: | OpenAIRE |
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