Bart J. F. Keijser1,2,3, Egija Zaura4,1,2, Susan M. Huse1,2,3, J.M.B.M. van der Vossen1,2,3, Frank Schuren1,2,3, R.C. Montijn1,2,3, J.M. ten Cate4,1,2, Wim Crielaard4,1,2
1Department of Cariology Endodontology Pedodontology, Academic Centre for Dentistry Amsterdam -ACTA-, University of Amsterdam and VU Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands; and
2Josephine Bay Paul Center, Marine Biological Laboratory, Woods Hole, MA, USA
3TNO Quality of Life, Business Unit Food and Biotechnology Innovations, Microbial Genomics Group, Zeist, The Netherlands
4Department of Cariology Endodontology Pedodontology, Academic Centre for Dentistry Amsterdam -ACTA-, University of Amsterdam and VU Amsterdam, Louwesweg 1, 1066 EA Amsterdam, The Netherlands
Tóm tắt
A good definition of commensal microflora and an understanding of its relation to health are essential in preventing and combating disease. We hypothesized that the species richness of human oral microflora is underestimated. Saliva and supragingival plaque were sampled from 71 and 98 healthy adults, respectively. Amplicons from the V6 hypervariable region of the small-subunit ribosomal RNA gene were generated by PCR, pooled into saliva and plaque pools, and sequenced by means of the Genome Sequencer 20 system at 454 Life Sciences. Data were evaluated by taxonomic and rarefaction analyses. The 197,600 sequences generated yielded about 29,000 unique sequences, representing 22 taxonomic phyla. Grouping the sequences in operational taxonomic units (6%) yielded 3621 and 6888 species-level phylotypes in saliva and plaque, respectively. This work gives a radically new insight into the diversity of human oral microflora, which, with an estimated number of 19,000 phylotypes, is considerably higher than previously reported.
