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Article in Spanish | LILACS | ID: lil-757877

ABSTRACT

Objetivo: Reportamos la asociación entre el polimorfismo de nucleótido simple de IL-10-592C/A (rs1800872) y la detección/abundancia relativa de los periodontopatógenos Porfiromonas gingivalis, Tenerella forsythia, Treponema denticola y Aggregatibacter actinomycetemcomitans. Además investigamos la influencia de los determinantes genéticos y microbiológicos en los niveles de expresión de IL-10 en lesiones periodontales. Metodología Fueron reclutados 117 pacientes con periodontitis crónica y 58 controles. Luego del examen clínico fueron obtenidas muestras microbiológicas y la presencia/carga bacteriana de especies de periodontopatógenos fue cuantificada por RT-PCR. El genotipo para IL-10-592C/A fue determinado mediante restriction fragment length polymorphism. Resultados La distribución alélica del SNP rs1800872 en la población investigada cumplió con el equilibrio de Hardy-Weinberg (p = 0,64). Como ya ha sido reportado, los sujetos polimórficos demostraron menor expresión de IL-10 y riesgo aumentado de sufrir periodontitis crónica. El polimorfismo IL-10-592C/A no demostró relación con la detección o carga bacteriana de ninguna de las bacterias investigadas, además los niveles de expresión de IL-10 no fueron influenciados por el perfil microbiológico, sino que se correlacionaron directamente con el genotipo para el polimorfismo IL-10-592C/A.


Objective: A study was conducted to investigate the possible influence of the single nucleotide polymorphism (SNP) IL-10-592 C/A on the occurrence and load of the periodontal pathogens: P. gingivalis, T. forsythia, T. denticolaand A. Actinomycetemcomitans; as well to investigate the influence of microbial and genetic factors on the modulation of local IL-10 mRNA levels. Methodology The study included 117 cases and 58 controls. After clinical examination microbiological samples were obtained and the detection/quantification of the target bacterial species was performed by RT-PCR. SNP rs1800872 was assayed by restriction fragment length polymorphism (RFLP). Results Allele distribution of rs1800872 was in Hardy-Weinberg equilibrium (P = 64). As previously reported, polymorphic subjects demonstrated decreased IL-10 expression and increased risk of suffering chronic periodontitis. IL-10-592C/A rs1800872 SNP was not associated with the detection or the bacterial load of the investigated pathogens. Moreover, the presence/load of bacteria at periodontal sites did not influence IL-10 expression, which was determined by the genetic background of the study subjects. IL-10-592C/A SNP was not associated with detection/bacterial load of pathogenic bacteria. IL-10 expression levels were determined by the genetic background and were independent of the bacterial microenvironment.


Subject(s)
Humans , Male , Adult , Female , Periodontal Diseases/genetics , Periodontal Diseases/microbiology , /genetics , Bacterial Load , Bacteria/isolation & purification , Case-Control Studies , DNA, Bacterial , Gingiva/microbiology , Periodontal Diseases/immunology , Host-Pathogen Interactions , /physiology , Polymorphism, Single Nucleotide , Real-Time Polymerase Chain Reaction
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