Collagenase production and hemolytic activity related to 16S rRNA variability among Parvimonas micra oral isolates

Autor(es)

Ota-Tsuzuki, Claudia ^{[1, 2]} ; Alves Mayer, Marcia Pinto ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Microbiol, Inst Ciencias Biomed, BR-05508900 Sao Paulo - Brazil

^[2] Univ Guarulhos, Dept Periodontol, Dent Res Div, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Anaerobe; v. 16, n. 1, p. 38-42, FEB 2010.
• Citações Web of Science: 7

Resumo

Parvimonas micra are gram positive anaerobic cocci isolated from the oral cavity and frequently related to polymicrobial infections in humans. Despite reports about phenotypic differences, the genotypic variation of P. micra and its role in virulence are still not elucidated. The aim of this study was to determine the genotypic diversity of P. micra isolates obtained from the subgingival biofilm of subjects with different periodontal conditions and to correlate these findings with phenotypic traits. Three reference strains and 35 isolates of P. micro were genotyped by 16S rRNA PCR-RFLP and phenotypic traits such as collagenase production, elastolytic and hemolytic activities were evaluated. 16S rRNA PCR-RFLP showed that P. micra could be grouped into two main clusters: C1 and C2; cluster C1 harbored three genotypes (HG1259-like, HG1467-like and ICBM0583-like) while cluster C2 harbored two genotypes (ATC03270-like and ICBM036). A wide variability in collagenolytic activity intensities was observed among all isolates, while elastolytic activity was detected in only two isolates. There was an association between hemolytic activity in rabbit erythrocytes and cluster C2. There was an association between hemolytic activity in rabbit erythrocytes and cluster C1. Although these data suggest a possible association between P. micra genetic diversity and their pathogenic potential, further investigations are needed to confirm this hypothesis. (C) 2009 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 00/10112-0 - Análise de fatores de virulência e do pleomorfismo genético dos patógenos periodontais Porphyromonas gingivalis e Peptostreptococcus micros
• Beneficiário: Marcia Pinto Alves Mayer
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 00/10047-4 - Análise de fatores de virulência e tipagem genotípica de isolados de Peptostreptococcus micros
• Beneficiário: Claudia Ota-Tsuzuki
• Modalidade de apoio: Bolsas no Brasil - Doutorado