Metataxonomic and metaproteomic profiling of the oral microbiome in oral lichen planus - a pilot study.

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Bankvall M, Carda-Diéguez M, Mira A, Karlsson A, Hasséus B, Karlsson R, Robledo-Sierra J

Journal of Oral Microbiology 15 (1) 2161726 [2022-12-28; online 2022-12-28]

A growing body of evidence demonstrates a different bacterial composition in the oral cavity of patients with oral lichen planus (OLP). Buccal swab samples were collected from affected and non-affected sites of six patients with reticular OLP and the healthy oral mucosa of six control subjects. 16S rRNA gene MiSeq sequencing and mass spectrometry-based proteomics were utilised to identify the metataxonomic and metaproteomic profiles of the oral microbiome in both groups. From the metataxonomic analysis, the most abundant species in the three subgroups were Streptococcus oralis and Pseudomonas aeruginosa, accounting for up to 70% of the total population. Principal Coordinates Analysis showed differential clustering of samples from the healthy and OLP groups. ANCOM-BC compositional analysis revealed multiple species (including P. aeruginosa and several species of Veillonella, Prevotella, Streptococcus and Neisseria) significantly over-represented in the control group and several (including Granulicatella elegans, Gemella haemolysans and G. parahaemolysans) in patients with OLP. The metaproteomic data were generally congruent and revealed that several Gemella haemolysans-belonging peptidases and other proteins with inflammatory and virulence potential were present in OLP lesions. Our data suggest that several bacterial species are associated with OLP. Future studies with larger cohorts should be conducted to determine their role in the aetiology of OLP and evaluate their potential as disease biomarkers.

Glycoproteomics and MS Proteomics [Service]

PubMed 36605405

DOI 10.1080/20002297.2022.2161726

Crossref 10.1080/20002297.2022.2161726

pmc: PMC9809343
pii: 2161726