Links found between Epstein-Barr virus and Oral Disease

Researchers at Oregon Health and Science University's School of Dentistry have found that

a significant percentage of dental patients with the inflammatory diseases irreversible pulpitis and apical periodontitis also have the Epstein-Barr virus. The Epstein-Barr virus is an important human pathogen found in more than 90% of the world population. It is associated with many diseases, including infectious mononucleosis, malignant lymphomas, and naspharyngeal carcinoma.

The findings are published online in the Journal of Endodontics, one of the leading peer-reviewed endodontology journals. Although the number of studies examining the role of herpesviruses in oral disease has been increasing, the majority of studies have focused on periodontitis, with no systematic attempt to examine herpesvirus in endodontic patients with varying inflammatory diseases. The OHSU study assessed the presence of human cytomegalovirus (HCMV), Epstein-Barr virus (EPV), herpes simplex virus (HSV-1), and Varicella zoster virus (VZV) in 82 endodontic patients, including patients with irreversible pulpitis and apical periodontitis, and compared them with 19 healthy patients. The goal of

the study was to determine the potential association of herpesvirus with clinical symptoms, including acute pain and size of radiographic bone destruction.

Using a variety of methods, the OHSU team found the Epstein-Barr virus DNA and RNA in significantly higher percentages (43.9 % and 25.6 % respectively) compared with healthy patients (0%). While a previous study examined the incidence of herpes viruses in apical periodontitis, "this is the first time irreversible pulpitis has been analyzed for the presence of herpes viruses and associated with Epstein-Barr virus," said Professor Curt Machida, lead scientists from OSHU integrative biosciences. "The incidence of irreversible pulpitis and apical periodontitis, caused by bacteria and possibly the latent herpes virus, is painful and can greatly impair the body's natural immune system. Studies such as ours could someday lead to more effective treatments of inflammatory diseases of the mouth."

The OHSU team included Hong Li, D.D.S., M.Sc., Ph.D., a recent OHSU endodontology graduate; third-year OHSU dental student Vicky Chen, B.S.; second-year OHSU dental student Yanwen Chen, Ph.D.; J. Craig Baumgartner, D.D.S., M.Sc., Ph.D., chairman of the OHSU endodontology department; and Machida. The research at OHSU was funded by grants from the American Association of Endodontists Foundation, the Oregon Clinical and Translational Research Institute, the NIH's National Center for Research Resources, and the NIH Roadmap for Medical Research.
Adapted from original press release