Periodontal bone loss and risk of epithelial ovarian cancer
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Abstract
Purpose
Periodontitis, a chronic inflammatory response to pathogenic bacteria in the oral microbiome, is common among adults. It is associated with several medical conditions, including cardiovascular diseases, and potentially with esophageal, lung, oral, and pancreatic cancer. One of the proposed mechanisms behind these associations is systemic inflammation, which has also been implicated in ovarian cancer etiology. The aim of this study was to evaluate association between ovarian cancer and periodontal bone loss.
Methods
The association between periodontal bone loss, a marker of periodontitis, and risk of epithelial ovarian cancer was estimated among 60,560 participants of the prospective Nurses’ Health Study using Cox proportional hazards analysis. Competing risks analysis was used to estimate association by histologic subtype.
Results
We did not observe an increased risk of ovarian cancer among participants with periodontal bone loss (HR 0.86, 95 % CI 0.64–1.15). Among women younger than 69 years, periodontal bone loss was associated with a 40 % (HR 0.60, 95 % CI 0.36–0.98) decreased ovarian cancer risk, while there was no association in women older than 69 (HR 1.09, 95 % CI 0.75–1.58), although this difference did not reach statistical significance (p-heterogeneity = 0.06). We observed a suggestive decreased risk for serous tumors (HR 0.76, 95 % CI 0.53–1.09). The number of natural teeth and root canals, other metrics of oral health, were not associated with ovarian cancer risk.
Conclusion
Our results do not support an increased ovarian cancer risk in women with periodontal bone loss; however, there was a significant decrease in risk in women younger than 69. Given the unexpected association between periodontal bone loss and ovarian cancer risk in younger women, further research is warranted.
Keywords
Ovarian cancer Periodontitis Oral microbiome Cohort studyNotes
Acknowledgments
This work was supported by the National Cancer Institute at the National Institutes of Health (UM1 CA186107, P01 CA87969, 5T32CA009001-38) and the Department of Defense (W81XWH-10-1-0280). We would like to thank the participants and staff of the Nurses’ Health Study for their valuable contributions as well as the following state cancer registries for their help: AL, AZ, AR, CA, CO, CT, DE, FL, GA, ID, IL, IN, IA, KY, LA, ME, MD, MA, MI, NE, NH, NJ, NY, NC, ND, OH, OK, OR, PA, RI, SC, TN, TX, VA, WA, WY.
Conflict of interest
The authors declare that they have no conflict of interest.
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