Toxic Oral Bacteria Linked to Severe Gum Disease in New Study
Researchers have identified a specific bacterial toxin that accelerates gum disease progression, potentially opening new diagnostic and treatment pathways. The finding could reshape how dentists identify high-risk patients and develop targeted therapies for periodontitis, a costly condition affecting millions globally.
Originaltitel: Prevalence of the oral pathogen <em>Filifactor alocis</em> and its FtxA toxin related to clinical parameters and presence of <em>Aggregatibacter actinomycetemcomitans</em>
<p>The Gram-positive organism <em>Filifactor alocis</em> is implicated in multiple oral diseases including periodontitis, and approximately 50% of known strains encode and produce a recently identified repeat-in-toxin (RTX) protein, <em>FtxA</em>, partly homologous to the <em>Aggregatibacter actinomycetemcomitans</em> leukotoxin. By assessing a longitudinal Ghanaian study population of adolescents, we recently identified a possible correlation between <em>F. alocis</em> levels, <em>ftxA</em> gene carriage, and progression of clinical attachment loss (CAL). To extend knowledge on the possible significance of <em>F. alocis</em> and its <em>FtxA</em> in periodontal disease, we have in the present work analyzed saliva samples in an independent cohort of periodontitis (n=156), collected at two private periodontal specialist practices in Perth, Western Australia. The present results corroborate that high loads of <em>F. alocis </em>and the presence of its <em>ftxA</em> gene together are associated with parameters of periodontal tissue destruction and severity. Moreover, among the individuals carrying <em>A. actinomycetemcomitans</em>, a majority also exhibited an <em>ftxA</em>-positive <em>F. alocis</em>, supporting the notion of the synergistic behavior of these two species. This emphasizes that <em>F. alocis</em> and its <em>ftxA</em> are involved in the pathogenesis of periodontitis and may have ecological roles, with diagnostic and prognostic implications for the disease.</p>