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CWRU researchers find byproducts of bacteria-causing gum disease incite oral cancer growth
Date:2/25/2014

Researchers from Case Western Reserve University have discovered how byproducts in the form of small fatty acids from two bacteria prevalent in gum disease incite the growth of deadly Kaposi's sarcoma-related (KS) lesions and tumors in the mouth.

The discovery could lead to early saliva testing for the bacteria, which, if found, could be treated and monitored for signs of cancer and before it develops into a malignancy, researchers say.

"These new findings provide one of the first looks at how the periodontal bacteria create a unique microenvironment in the oral cavity that contributes to the replication the Kaposi's sarcoma Herpesvirus (KSHV) and development of KS," said Fengchun Ye, the study's lead investigator from Case Western Reserve School of Dental Medicine's Department of Biological Sciences.

The discovery is described in The Journal of Virology article, "Short Chain Fatty Acids from Periodontal Pathogens Suppress HDACs, EZH2, and SUV39H1 to Promote Kaposi's Sarcoma-Associated Herpesvirus Replication."

The research focuses on how the bacteria, Porphyromonas gingivalis (Pg) and Fusobacterium nucleatum (Fn), which are associated with gum disease, contribute to cancer formation.

Ye said high levels of these bacteria are found in the saliva of people with periodontal disease, and at lower levels in those with good oral healthfurther evidence of the link between oral and overall physical health.

KS impacts a significant number of people with HIV, whose immune systems lack the ability to fight off the herpesvirus and other infections, he said.

"These individual are susceptible to the cancer," Ye said.

KS first appears as lesions on the surface of the mouth that, if not removed, can grow into malignant tumors. Survival rates are higher when detected and treated early in the lesion state than when a malignancy develops.

Also at risk are people with
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Contact: Susan Griffith
susan.griffith@case.edu
216-368-1004
Case Western Reserve University
Source:Eurekalert

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