(Stroke. 2000;31:2127.)
© 2000 American Heart Association, Inc.
Original Contributions |
Are Morphological or Functional Changes in the Carotid Artery Wall Associated With Chlamydia pneumoniae, Helicobacter pylori, Cytomegalovirus, or Herpes Simplex Virus Infection?
From the 2nd Department of Medicine (C.E.-K., H.-J.R., S.B., C.B., H.K., U.P., J.M.), the Institute for Medical Statistics and Documentation (G.R.), and the Institute for Clinical Chemistry and Laboratory Medicine (G.H.), Johannes-Gutenberg University, Mainz, Germany.
Correspondence to Christine Espinola-Klein, MD, 2nd Department of Medicine, Johannes-Gutenberg-University Mainz, Langenbeckstrasse 1, 55101 Mainz, Germany. E-mail espinola{at}mail.uni-mainz.de
Background and Purpose—Chronic infection with Chlamydia pneumoniae, Helicobacter pylori, cytomegalovirus (CMV), and herpes simplex virus (HSV) has been implicated in the pathogenesis of atherosclerosis. The carotid intima-media thickness (IMT) can be taken to indicate early atherosclerosis, the presence of a carotid stenosis is a marker of a manifest carotid atherosclerosis, and an increase in arterial stiffness is used as marker of structural and functional changes in an atherosclerotic vessel wall.
Methods—In 504 patients (75% men; mean age 62.9 [SD 10] years), we measured the IMT and the elastic pressure modulus (EP; n=445) of the common carotid artery and the prevalence of a internal or external carotid artery stenosis. Blood samples were taken, and antibodies against C pneumoniae, H pylori, CMV, and HSV types 1 and 2 were evaluated. Statistical evaluation was performed with regression procedures and multivariate logistic regression analyses.
Results—Seropositivity for C pneumoniae was an independent predictor for a combined end point of highest category of IMT and carotid artery stenosis (OR 1.8, 95% CI 1.1 to 3.1; adjusted) for IgG titers. Independently, CMV increased the risk for the combined end point (OR 1.7, 95% CI 1.1 to 2.8; adjusted) for IgG titers and for IgA titers (OR 2.3, 95% CI 1.1 to 4.9; adjusted). We found a significant correlation between IgG antibodies against CMV and EP; HSV type 2 IgG titers were associated with IMT and carotid stenosis, but the latter results were no longer significant after adjustment. There was no association with H pylori or HSV type 1.
Conclusions—We found a significant association of IgG antibodies against C pneumoniae and CMV with early and advanced carotid atherosclerosis. CMV was also correlated to functional changes of the carotid artery, but this could not be confirmed after adjustment.
Key Words: atherosclerosis • bacterial infections • carotid arteries • viruses
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