Journal article

Porphyromonas gingivalis and Treponema denticola Exhibit Metabolic Symbioses

Kheng H Tan, Christine A Seers, Stuart G Dashper, Helen L Mitchell, James S Pyke, Vincent Meuric, Nada Slakeski, Steven M Cleal, Jenny L Chambers, Malcolm J McConville, Eric C Reynolds

PLOS PATHOGENS | PUBLIC LIBRARY SCIENCE | Published : 2014

Abstract

Porphyromonas gingivalis and Treponema denticola are strongly associated with chronic periodontitis. These bacteria have been co-localized in subgingival plaque and demonstrated to exhibit symbiosis in growth in vitro and synergistic virulence upon co-infection in animal models of disease. Here we show that during continuous co-culture a P. gingivalis:T. denticola cell ratio of 6∶1 was maintained with a respective increase of 54% and 30% in cell numbers when compared with mono-culture. Co-culture caused significant changes in global gene expression in both species with altered expression of 184 T. denticola and 134 P. gingivalis genes. P. gingivalis genes encoding a predicted thiamine biosyn..

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