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Volume 70, Issue 9

Identification & correlation of bacterial diversity in oral cancer and long-term tobacco chewers- A case-control pilot study No Access

Abstract

Squamous cell carcinoma is a highly aggressive type of oral cancer (OC). It is the most common cancer among men, and accounts for almost 90 % of all oral cancers in India. Consumption of tobacco is a leading factor contributing to maximum oral cancer incidences as per the WHO.

Researchers reported a direct association of microorganisms with dysbiosis in various oral lesions including oral cancer. However, there is a dearth of information related to compositional changes in the oral microbiome in long-term tobacco chewers and the Indian oral cancer population.

The aim of this study was to identify and correlate the bacterial diversity in the oral cavity of tobacco chewers, patients with oral cancer and healthy subjects in the Indian population.

Oral rinse samples were collected for ten subjects in each group followed by DNA extraction. The variable regions of the bacterial 16S rRNA gene (V6-V8) were amplified, sequenced, processed, and analysed using QIIME2 platform to assess alpha and beta diversity between the study groups.

This pilot study showed genus dominated the control group (18.54 %), and the abundance decreased in tobacco and OC group (9.63 and 5.45% respectively); whereas genus dominated the tobacco and OC group (21.01 and 26.03% respectively). A shift in abundance of microbiome was observed from control population to oral cancer via the tobacco chewing population. Maximum alpha diversity of oral microbiome was found in Indian tobacco chewers. Beta diversity of tobacco chewers was similar to both the healthy population as well as oral cancer patients suggesting transitioning of the oral microbiome from healthy to oral cancer microbiome via the tobacco chewers microbiome.

The data provides evidence of oral bacterial dysbiosis due to tobacco chewing habits that can further lead to progression towards cancer.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Dysbiosis , Microbiome , Oral cancer and Tobacco
Funding
This study was supported by the:
  • Seoul Women`s University
    • Principle Award Recipient: ShriyaSawant
  • NMIMS University
    • Principle Award Recipient: ShriyaSawant
© 2021 The Authors
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/content/journal/jmm/10.1099/jmm.0.001417
2021-09-23
2024-04-26
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Identification & correlation of bacterial diversity in oral cancer and long-term tobacco chewers- A case-control pilot study
J. Med. Microbiol. 70, 001417 (2021); https://doi.org/10.1099/jmm.0.001417
/content/journal/jmm/10.1099/jmm.0.001417
/content/journal/jmm/10.1099/jmm.0.001417
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