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Klymiuk I, Bilgilier C, Mahnert A, Prokesch A, Heininger C, Brandl I, Sahbegovic H, Singer C, Fuereder T, Steininger C. Chemotherapy-associated oral microbiome changes in breast cancer patients. Front Oncol 2022; 12:949071. [PMID: 36016616 PMCID: PMC9396302 DOI: 10.3389/fonc.2022.949071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/15/2022] [Indexed: 11/17/2022] Open
Abstract
Cytotoxic chemotherapy with or without a combination of humanized monoclonal antibodies is regarded as the gold standard of personalized medicine for the treatment of breast cancer patients. Significant medication-related side effects are common accompanying phenomena for these patients, such as oral discomfort, mucositis, or even osteonecrosis of the jaw. In this study, we analyze the saliva samples of 20 breast cancer patients at three time points throughout their chemotherapy: at the baseline prior to treatment initiation (T1), after four-to-six cycles of chemotherapy (T2), and 1 year after the start of the treatment (T3) to investigate and characterize the long-term effects of chemotherapy on the oral microbiome. We aimed to characterize changes in the oral bacterial microbiome based on 16S rRNA gene amplicon analysis during chemotherapeutic treatment, as a potential target to treat common oral side effects occurring during therapy. The chemotherapeutic drugs used in our study for patient treatment were trastuzumab, docetaxel, pertuzumab, epirubicin, and cyclophosphamide. We find a significant increase in the relative abundance of potentially pathogenic taxa like Escherichia/Shigella and non-significant trends in the relative abundance of, for example, Actinomyces ssp. In conclusion, the role of microbiota in the oral side effects of chemotherapeutic treatment needs to be considered and should be analyzed in more detail using larger patient cohorts. Oral side effects in breast cancer patients undergoing chemotherapy are a common burden and should be treated for a better tolerability of the therapy.
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Affiliation(s)
- Ingeborg Klymiuk
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Ceren Bilgilier
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine I, Medical University Vienna, Vienna, Austria
| | - Alexander Mahnert
- Diagnostic and Research Institute of Hygiene, Microbiology and Environmental Medicine, Medical University of Graz, Graz, Austria
| | - Andreas Prokesch
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Christoph Heininger
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Ingeborg Brandl
- Department of Gynecology, Clinical Department of General Gynecology and Gynecological Oncology. Medical University Vienna, Vienna, Austria
| | - Hanka Sahbegovic
- Department of Gynecology, Clinical Department of General Gynecology and Gynecological Oncology. Medical University Vienna, Vienna, Austria
| | - Christian Singer
- Department of Gynecology, Clinical Department of General Gynecology and Gynecological Oncology. Medical University Vienna, Vienna, Austria
| | - Thorsten Fuereder
- Division of Oncology, Department of Medicine I, Medical University Vienna, Vienna, Austria
| | - Christoph Steininger
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine I, Medical University Vienna, Vienna, Austria
- Karl Landsteiner Institute for Microbiome Research, St. Pölten, Austria
- *Correspondence: Christoph Steininger,
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