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Microbial community alteration in tongue squamous cell carcinoma

  • Applied Microbial and Cell Physiology
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Abstract

Tongue squamous cell carcinoma (TSCC) is the most common oral cavity malignancy. The role of the microbial community in TSCC development and progression is unclear. In the present study, 23 patients with TSCC were recruited. Tissue DNA was extracted from cancer and paracancerous normal tissues from all participants. Next-generation 16S rDNA amplicon sequencing and functional prediction were applied for taxonomic analysis. Alpha diversity measurements using the Shannon and Simpson diversity indexes indicated a significant increase in the microbiotic diversity of cancer samples (Shannon index: P = 0.001, Simpson index: P = 0.015); otherwise, no differences were found when using observed operational taxonomic units (OTUs) and Chao1 index (observed OTUs: P = 0.261, Chao1 index: P = 0.054). The dominant phyla of the microbiota included Bacteroidetes, Proteobacteria, Firmicutes, Actinobacteria, and Fusobacteria. Multivariate analysis of variance (Adonis) and nonparametric analysis of similarities (ANOSIM) based on unweighted unifrac distances demonstrated differences in the bacterial community structure between the two groups (P = 0.001 for Adonis, P = 0.001 for ANOSIM). Compared with the normal samples, Neisseria, Streptococcus, and Actinomyces levels decreased significantly in cancer samples. Co-occurrence network analysis implied that the bacterial community in cancer was more conserved than that in normal tissue. Matched-pair analysis of cancer and control samples revealed a significant alteration in the relative abundance of specific taxa. These findings will enrich our knowledge of the association between the oral microbial community and TSCC. Further experiments should investigate the potential carcinogenic mechanism of microbial community alterations in TSCC.

Key points

• Microbial community role in tongue squamous cell carcinoma.

• Significant alteration of microbiome found between cancer and normal tissues.

• Microbial community alteration and potential carcinogenic mechanism.

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Data availability

All data generated or analyzed during this study are included in this published article.

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Funding

This work was supported by the National Key Research and Development Program of China (Grant: 2018YFC2000505) and the Applied Research Program of Capital Clinical Features (Grant Z18110001718172).

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Authors and Affiliations

Authors

Contributions

PY, HTX, and ZYL conceived the study. YL, PY, YJC, HY, and HTX analyzed data. PY and YL wrote the manuscript. All authors contributed to literature searches. All authors have read and approved the manuscript.

Corresponding authors

Correspondence to Hong-Tao Xu or Zhi-Yue Lu.

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Ethics approval

This study was approved by the Ethics Committee of Beijing Hospital.

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All recruited patients have signed their consent form to participate.

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All co-authors have given their consent to publish this manuscript.

Conflict of interest

Theauthors declare no competing interests.

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Ye, P., Liu, Y., Cai, YJ. et al. Microbial community alteration in tongue squamous cell carcinoma. Appl Microbiol Biotechnol 105, 8457–8467 (2021). https://doi.org/10.1007/s00253-021-11593-4

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  • DOI: https://doi.org/10.1007/s00253-021-11593-4

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