Microbiome composition and metabolic pathways in shallow and deep periodontal pocketsOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers characterized the subgingival microbiome in shallow versus deep periodontal pockets within the same mouth, in adults in their early 70s born in 1950 to 1951.
How was it studied?
The team analyzed 1928 subgingival samples from 1287 participants who had either shallow (4 mm or less) pockets only, or a combination of shallow and deep (5 mm or more) pockets, comparing microbial composition and predicted metabolic pathways across niches.
What did they find?
Deep pockets were enriched for Prevotella, Centipeda, Treponema, and Fusobacterium, with Fretibacterium fastidiosum, Tannerella forsythia, and Treponema denticola as top species. Shallow pockets favored Actinomyces, Pauljensenia, Streptococcus, Gemella, and Rothia dentocariosa. Shallow pockets coexisting with deep pockets showed higher Tannerella forsythia, Porphyromonas gingivalis, and Fusobacterium nucleatum than shallow-only pockets. Deep pockets were positively associated with lipopolysaccharide metabolism, lipid metabolism, and polyamine biosynthesis pathways.
Why it matters
The findings show that pocket depth shapes microbial niches within the same oral cavity in aging adults, informing periodontal disease characterization and its links to systemic health risk in older populations.