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Porphyromonas gingivalis accelerates inflammatory atherosclerosis in a mouse model
Date:1/4/2011

Atherosclerosis is the leading cause of death in the developed world. While a number of risk factors for atherosclerosis have been defined, scientists continue to study other possible risk factors for this disease. Recent epidemiological and experimental studies link infectious agents with the development of inflammatory atherosclerosis. A hallmark of chronic infection with the oral pathogen Porphyromonas gingivalis is the induction of a chronic inflammatory response. P. gingivalis induces a local inflammatory response that results in oral bone destruction, which is manifested as periodontal disease, an inflammatory disease that affects approximately 100 million people in the US. In addition to chronic inflammation at the initial site of infection, mounting evidence has accumulated supporting a role for P. gingivalis-mediated periodontal disease as a risk factor for systemic diseases including, diabetes, pre-term birth, stroke, and atherosclerotic cardiovascular disease.

In new studies Dr. Caroline Genco together with Dr. James Hamilton at Boston University School of Medicine have begun to define the precise mechanisms contributing to the link between infection with P. gingivalis and atherosclerotic disease. In elegant studies recently published (Atherosclerosis-12-22-10 online publication date) these investigators report on in-vivo high-resolution magnetic resonance imaging (MRI) to document P. gingivalis mediated inflammation and atherosclerosis in a mouse model. MRI is a novel modality that allows for detailed studies of atherosclerosis progression in the same animal that can depict the narrowing of the arterial lumen and small vessel wall areas. Genco and collogues demonstrate that P. gingivalis infection accelerates inflammation and atherosclerosis in the innominate artery, an artery that has a high degree of lesion progression. Lesions in the innominate artery express features characteristic
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Contact: Gina DiGravio
gina.digravio@bmc.org
617-638-8480
Boston University Medical Center
Source:Eurekalert

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