Abstract
Purpose
Nasopharyngeal carcinoma (NPC), an epithelial-originated malignant tumor, has a special geographic distribution. However, the etiology of NPC has not been examined in detail. Increasing pieces of evidence indicate that the microbiome may contribute to head and neck squamous cell carcinoma. Until now, there is limited information on the role of the microbiome in NPC, so we assessed variations in the nasopharynx microbiota of patients with NPC relative to the bacterial in health controls.
Methods
Nasopharynx lavage fluid (NLF) samples were collected from 11 NPC patients and 5 volunteer controls. 16S rRNA sequencing and comparative analyses of NLF bacterial microbiome between NPC patients and controls were performed.
Results
NLF microbial alpha-diversity by the Shannon index and Simpson index decreased significantly in the NPC patients when compared with the controls. Beta-diversity by principal component analysis exhibited separated patterns of the NPC patients and healthy controls. Thirty-one genera differed significantly between the NPC patient group and healthy control group. The abundance of 17 bacteria was correlated with primary tumor size and invaded lymph node size. Functional gene prediction analysis showed that 9 gene function pathways were significantly different between the two groups.
Conclusion
Our results demonstrated that the nasopharynx microbiota in NPC patients was different from that of the healthy controls, suggesting that the nasopharynx microenvironment might be related to NPC.
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Data availability
The data of this study are available by contacting the corresponding author upon reasonable request.
Code availability
Not applicable.
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Funding
This study was supported by grants from the National Natural Science Foundation of China grant number No. 81603423 and No. 81601357, Dalian Science and Technology Star Project grant number 2017RQ040, and Liaoning Province Natural Science Foundation grant number 2019-ZD-0939.
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Yanjie GUO contributed to the study design. Longjie Li performed experiments and wrote the manuscript. Xiaoqin Deng and Yang Zou collected clinical sample. XiuPeng Lv and Longjie Li contributed to the data analyses and wrote the manuscript.
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This study was approved by the ethics committee of the First Affiliated Hospital of Dalian Medical University.
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Written consent was obtained from all patients or the legal guardian of the patient to provide information and samples for research purposes.
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Li, L., Deng, X., Zou, Y. et al. Characterization of the nasopharynx microbiota in patients with nasopharyngeal carcinoma vs. healthy controls. Braz J Microbiol 52, 1873–1880 (2021). https://doi.org/10.1007/s42770-021-00594-0
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DOI: https://doi.org/10.1007/s42770-021-00594-0