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Inicio Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral Variabilidad de la síntesis de citoquinas por células dendríticas humanas est...
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Vol. 6. Núm. 2.
Páginas 57-62 (Agosto 2013)
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Vol. 6. Núm. 2.
Páginas 57-62 (Agosto 2013)
Open Access
Variabilidad de la síntesis de citoquinas por células dendríticas humanas estimuladas con los distintos serotipos de Aggregatibacter actinomycetecomitans
Variability in the cytokine synthesis by human dendritic cells in response to different Aggregatibacter actinomycetemcomitans serotypes
Visitas
1283
J. Díaz-Zúñiga1,
Autor para correspondencia
zaidemiaj@gmail.com

Correspondencia autor:
, S. Melgar-Rodríguez1, J.P. Yáñez1, C. Álvarez1, C. Rojas1, A. Benítez1, P. Ciuchi1, G. Monasterio1, R. Vernal1,
Autor para correspondencia
rvernal@uchile.cl

Correspondencia autor:
1 Laboratorio de Biología Periodontal. Departamento de Odontología Conservadora. Facultad de Odontología, Universidad de Chile. Chile
Este artículo ha recibido

Under a Creative Commons license
Información del artículo
Resumen
Objetivo

Sobre la base de la antigenicidad del polisacárido O del LPS, en A. actinomycetemcomitans se describen distintos serotipos bacterianos y entre ellos se ha especulado una patogenicidad e inmunogenicidad diferente. El objetivo de este trabajo es analizar las diferencias en la síntesis de citoquinas producidas por células dendríticas cuando son estimuladas con los distintos serotipos de A. actinomycetemcomitans.

Metodología

Células dendríticas diferenciadas a partir de monocitos circulantes periféricos humanos fueron estimuladas a MOIs=10-1-10-2 con los serotipos a, b y c de A. Actinomycetemcomitans. Mediante PCR y ELISA se evaluaron los niveles de expresión y secreción de citoquinas.

Resultados

En las células dendríticas, la producción de citoquinas fue diferente ante los distintos serotipos de A. actinomycetemcomitans, con mayores niveles de secreción de IL-1β, IL-6, IL-12, IL-23, IFN-γ y TNF-α cuando el microorganismo estimulante fue la cepa ATCC® 43718™ (serotipo b).

Conclusión

El serotipo b de A. actinomycetemcomitans posee un mayor potencial inmuno-estimulador de células dendríticas comparado con los otros serotipos bacterianos y potencialmente contribuiría a inducir un patrón de respuesta inmune tipo Th1 y/o Th17 durante las periodontitis.

Palabras clave:
Células dendríticas
citoquinas
Aggregatibacter actinomycetemcomitans
Abstract
Objective

A. actinomycetemcomitans expresses a number of virulence factors that contribute to direct tissue damage and, based on the antigenicity of LPS O-polysaccharide, distinct serotypes have been described. The aim of this study was to determine the pattern of cytokine expression and secretion on dendritic cells stimulated with A. actinomycetemcomitans serotypes a, b and c.

Methods

Using different multiplicity of infections of the serotypes a, b, and c of A. actinomycetemcomitans, the mRNA expression and secretion levels for cytokines IL-1β, IL-5, IL-6, IL-10, IL-12, IL-23, TNF-α, and IFN-γ were determined in stimulated dendritic cells using PCR and ELISA.

Results

A dose-dependent increase in the secretion levels for IL-1β, IL-5, IL-6, IL-10, IL-12, IL-23, TNF-α, and IFN-γ was elicited on dendritic cells following stimulation with each of the serotypes of A. actinomycetemcomitans. In addition, A. actinomycetemcomitans serotype b (ATCC® 43718™) induced higher levels of IL-1β, IL-6, IL-12, IL-23, IFN-γ y TNF-α compared with the other strains.

Conclusion

These data demonstrate that the distinct A. actinomycetemcomitans LPS O-polysaccharide serotypes induce both quantitative and qualitative differences in the dendritic cell response. Furthermore, the observed dendritic cell response to A. actinomycetemcomitans b serotype was characteristic of a Th1 and Th17 pattern of cytokine expression.

Key words:
Dendritic cells
citokines
Agregagibacter actinomycetemcomitans
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