1. Oral microbiota affects the efficacy and prognosis of radiotherapy for colorectal cancer in mouse models.
- Author
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Dong J, Li Y, Xiao H, Zhang S, Wang B, Wang H, Li Y, Fan S, and Cui M
- Subjects
- Animals, Cell Line, Tumor, Humans, Male, Mice, Mice, Inbred BALB C, Mice, Nude, Colorectal Neoplasms microbiology, Colorectal Neoplasms radiotherapy, Fusobacterium nucleatum growth & development, Microbiota, Mouth Mucosa microbiology, Neoplasms, Experimental microbiology, Neoplasms, Experimental radiotherapy
- Abstract
Radiotherapy is inevitably intertwined with various side effects impairing the quality of life of cancer patients. Here, we report the possibility that alterations of the oral microbiota influence the therapeutic efficacy and prognosis of radiotherapy for primary rectal cancer and colorectal cancer (CRC) liver metastases that pathologically disrupt gastrointestinal integrity and function. 16S rRNA sequencing shows that oral microbiota alterations change the gut bacterial composition within tumors but not in adjacent peritumor tissues in CRC mouse models. Specifically, buccal Fusobacterium nucleatum migrates to the CRC locus and impairs the therapeutic efficacy and prognosis of radiotherapy. Administration of a specific antibiotic, metronidazole, abrogates the adverse effects of oral microbiome fluctuation on radiotherapy for CRC. The oral microbiota were also associated with radiation-induced intestinal injury via intestinal microbes. Our findings demonstrate that the oral microbiome in synergy with its intestinal counterparts impinges on the efficacy and prognosis of radiotherapy for CRC., Competing Interests: Declaration of interests The authors declare no competing interests., (Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2021
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