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(Circulation. 2005;111:576-582.)
© 2005 American Heart Association, Inc.

Epidemiology

Periodontal Microbiota and Carotid Intima-Media Thickness

The Oral Infections and Vascular Disease Epidemiology Study (INVEST)

Moïse Desvarieux, MD, PhD; Ryan T. Demmer, MPH; Tatjana Rundek, MD, PhD; Bernadette Boden-Albala, DrPH; David R. Jacobs, Jr, PhD; Ralph L. Sacco, MD, MS; Panos N. Papapanou, DDS, PhD

From the Division of Epidemiology (M.D., R.T.D., D.R.J.), School of Public Health, and Department of Medicine (M.D.), Medical School, University of Minnesota, Minneapolis, Minn; Departments of Neurology (T.R., B.B.-A., R.L.S.), Columbia University College of Physicians and Surgeons and Sociomedical Sciences (B.B.-A.) and Epidemiology (M.D., R.L.S.), Mailman School of Public Health, Columbia University, New York, NY; and Division of Periodontics (P.N.P.), Columbia University School of Dental and Oral Surgery, New York, NY.

Reprint requests to Moïse Desvarieux, MD, PhD, 1300 South Second St, Suite 300, Minneapolis, MN 55454. E-mail Desvarieux{at}epi.umn.edu

Received August 9, 2004; revision received October 25, 2004; accepted October 29, 2004.

Background— Chronic infections, including periodontal infections, may predispose to cardiovascular disease. We investigated the relationship between periodontal microbiota and subclinical atherosclerosis.

Methods and Results— Of 1056 persons (age 69±9 years) with no history of stroke or myocardial infarction enrolled in the Oral Infections and Vascular Disease Epidemiology Study (INVEST), we analyzed 657 dentate subjects. Among these subjects, 4561 subgingival plaque samples were collected (average of 7 samples/subject) and quantitatively assessed for 11 known periodontal bacteria by DNA-DNA checkerboard hybridization. Extensive in-person cardiovascular risk factor measurements, a carotid scan with high-resolution B-mode ultrasound, white blood cell count, and C-reactive protein values were obtained. In 3 separate analyses, mean carotid artery intima-media thickness (IMT) was regressed on tertiles of (1) burden of all bacteria assessed, (2) burden of bacteria causative of periodontal disease (etiologic bacterial burden), and (3) the relative predominance of causative/over other bacteria in the subgingival plaque. All analyses were adjusted for age, race/ethnicity, gender, education, body mass index, smoking, diabetes, systolic blood pressure, and LDL and HDL cholesterol. Overall periodontal bacterial burden was related to carotid IMT. This relationship was specific to causative bacterial burden and the dominance of etiologic bacteria in the observed microbiological niche. Adjusted mean IMT values across tertiles of etiologic bacterial dominance were 0.84, 0.85, and 0.88 (P=0.002). Similarly, white blood cell values increased across tertiles of etiologic bacterial burden from 5.57 to 6.09 and 6.03 cells x10⁹/L (P=0.01). C-reactive protein values were unrelated to periodontal microbial status (P=0.82).

Conclusions— Our data provide evidence of a direct relationship between periodontal microbiology and subclinical atherosclerosis. This relationship exists independent of C-reactive protein.

Key Words: infection • inflammation • atherosclerosis • epidemiology • carotid arteries

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