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Journal of Dental Research
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Biological

Bacteria Interfere with A. actinomycetemcomitans Colonization

W. Teughels1,*, S. Kinder Haake2, I. Sliepen1, M. Pauwels1, J. Van Eldere3, J.-J. Cassiman4 and M. Quirynen1

1 Catholic University Leuven, Research Group for Microbial Adhesion, Department of Periodontology, Kapucijnenvoer 7, 3000 Leuven, Belgium;
2 UCLA, School of Dentistry, 10833 Le Conte Avenue, Los Angeles, CA, USA;
3 Catholic University Leuven, Centre for Molecular Diagnostics, Herestraat 49, 3000 Leuven, Belgium; and
4 Catholic University Leuven, Centre for Human Genetics, Herestraat 49, 3000 Leuven, Belgium

Correspondence: * corresponding author, Wim.Teughels{at}med.kuleuven.be

It is known that beneficial bacteria can suppress the emergence of pathogenic bacteria, particularly in the gastrointestinal tract. This study examined the potential for a similar suppression of Aggregatibacter (formerly Actinobacillus) actinomycetemcomitans colonization of epithelial cells, due to its potential relevance in periodontal diseases. Seven presumed beneficial bacteria were examined for their ability to interfere, exclude, or displace A. actinomycetemcomitans from epithelial cells in vitro. Streptococcus sanguinis, Streptococcus mitis, and Streptococcus salivarius showed prominent inhibitory effects on either A. actinomycetemcomitans recovery or colonization. These results confirmed the hypothesis that bacterial interactions interfere with A. actinomycetemcomitans colonization of epithelial cells in vitro, and demonstrated the potential beneficial effects of S. mitis, S. salivarius, and S. sanguinis.

Key Words: Aggregatibacter actinomycetemcomitans • probiotic • adherence • epithelial cells • polymicrobial

Journal of Dental Research, Vol. 86, No. 7, 611-617 (2007)
DOI: 10.1177/154405910708600706
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