Journal
ORAL MICROBIOLOGY AND IMMUNOLOGY
Volume 17, Issue 1, Pages 50-54Publisher
BLACKWELL MUNKSGAARD
DOI: 10.1046/j.0902-0055.2001.00089.x
Keywords
Porphyromonas gingivalis; Prevotella intermedia; Prevotella nigrescens; Fusobacterium nucleatum; dipeptide; protease
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Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens and Fusobacterium nucleation, which can frequently be isolated from periodontal pockets, preferentially utilize proteins and peptides as growth substrates. In this study, we determined the size of peptide that is preferentially utilized as a source of energy and material for cell growth by P. gingivalis, P. intermedia, P. nigrescens and F nucleation using various sizes of poly amino acids consisting of two to approximately 100 molecules of aspartate or glutamate. Resting cells of P. gingivalis, P. intermedia and P. nigrescens utilized aspartylaspartate, while cells of P. gingivalis and F. nucleation utilized glutamylglutamate. The addition of aspartylaspartate to the culture medium increased the growth of P. gingivalis, P. intermedia and P. nigrescens, while the addition of glutamylglutamate promoted the growth of P. gingivalis and F nucleatum. These results clearly indicate that dipeptides such as aspartylaspartate and glutamylglutamate can be utilized as growth substrates for P. gingivalis, P. intermedia, P. nigrescens and F. nucleatum.
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