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Inicio Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral Virulencia y variabilidad de Porphyromonas gingivalis y Aggregatibacter actinomy...
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Vol. 5. Núm. 1.
Páginas 40-45 (abril 2012)
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Vol. 5. Núm. 1.
Páginas 40-45 (abril 2012)
Open Access
Virulencia y variabilidad de Porphyromonas gingivalis y Aggregatibacter actinomycetemcomitans y su asociación a la periodontitis
Virulence and variability on Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans and their association to periodontitis
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J. Díaz Zúñiga1,
Autor para correspondencia
zaidemiaj@gmail.com

Correspondencia autor.
, J. Yáñez Figueroa1, S. Melgar Rodríguez1, C. Álvarez Rivas1, C. Rojas Lagos1, R. Vernal Astudillo1
1 Laboratorio de Biología Periodontal. Facultad de Odontología, Universidad de Chile. Chile
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Las periodontitis son un conjunto de patologías de naturaleza inflamatoria y etiología infecciosa producidas por el biofilm patogénico subgingival. Porphyromonas gingivalis y Aggregatibacter actinomycetemcomitans son bacterias periodonto-patógenas que pueden causar daño directo a las estructuras periodontales a través de los diversos factores de virulencia que expresan. Sobre la base de estos factores de virulencia, distintos genotipos y serotipos bacterianos se han descrito, cada uno de ellos con una potencial variable patogenicidad. En esta revisión bibliográfica se describen diferentes factores de virulencia de P. gingivalis y A. actinomycetemcomitans y se discute la variable inmunogenicidad y patogenicidad de los distintos genotipos y serotipos descritos para ellos. Tanto P. gingivalis como A. actinomycetemcomitans poseen diversos factores de virulencia asociados al inicio, progresión y severidad de las periodontitis. En P. gingivalis, los factores de virulencia para los cuales se describen distintos genotipos y/o serotipos son fimbria, LPS y cápsula bacteriana, y en A. actinomycetemcomitans son leucotoxina A, Cdt y LPS. Cada uno de estos distintos genotipos y serotipos induce una respuesta inmuno-inflamatoria diferente en el hospedero y, por lo tanto, se podrían asociar a una variable patogenicidad y podrían determinar las características clínicas de la enfermedad.

Palabras clave:
Virulencia
genotipos
serotipos
Porphyromonas gingivalis
Aggregatibacter actinomycetemcomitans
Abstract

Periodontitis represents a heterogenic group of periodontal infections elicited by bacteria residing at the subgingival biofilm. Although this biofilm is constituted by a broad variety of bacterial species, only a limited number has been associated with the periodontitis aetiology, among them Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. Both P. gingivalis and A. actinomycetemcomitans express a number of virulence factors that contribute to direct tissue damage and, based on them, distinct genotypes and serotypes have been described, each one with a potential variable pathogenicity. This review aimed to analyze the different virulence factors described for P. gingivalis and A. actinomycetemcomitans and to discuss the variable immunogenicity and pathogenicity of their serotypes and genotypes. P. gingivalis and A. actinomycetemcomitans express different virulence factors and they determine the initiation, progression, and severity of periodontitis. In P. gingivalis, distinct serotypes and/or genotypes are described based on fimbriae, LPS, and capsule. Additionally, in A. actinomycetemcomitans distinct serotypes and/or genotypes are described based on leucotoxin A, Cdt, and LPS. These distinct serotypes and genotypes induce a differential immunoinflammatory response and, thus, could be associated with variations in pathogenicity and reflected in clinic characteristics of the disease.

Key words:
Virulence
genotypes
serotypes
Porphyromonas gingivalis
Aggregatibacter actinomycetemcomitans
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