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Chlamydia pneumoniae in atherosclerotic middle cerebral artery
1Department of Medical Microbiology, University of Szeged, Szeged, Hungary, The Wistar Institute, Philadelphia, PA, USA.
Insights
Chlamydia pneumoniae was detected in atherosclerotic middle cerebral arteries, suggesting its role in cerebrovascular diseases. This finding supports the link between this pathogen and atherosclerosis, a key factor in stroke.
Area of Science:
- Neurology
- Infectious Diseases
- Pathology
Background:
- Atherosclerosis in middle cerebral arteries is a common cause of stroke.
- Chlamydia pneumoniae is a suspected contributor to atherosclerosis.
- The presence of C. pneumoniae in these specific arteries was previously undocumented.
Purpose of the Study:
- To investigate the presence of Chlamydia pneumoniae in atherosclerotic middle cerebral arteries.
- To determine if C. pneumoniae DNA or particles are detectable in these plaques.
Main Methods:
- Analysis of atherosclerotic middle cerebral artery plaques from 15 cadavers.
- Examination of non-atherosclerotic arteries from 4 trauma victims as controls.
- Detection of C. pneumoniae DNA using nested PCR (nPCR) and confirmation via transmission electron microscopy.
Main Results:
- Chlamydia pneumoniae DNA was identified in 5 out of 15 atherosclerotic arterial samples.
- No C. pneumoniae was detected in the control (non-atherosclerotic) arteries.
- Electron microscopy revealed particles consistent with C. pneumoniae in 4 of the positive atherosclerotic samples.
Conclusions:
- The detection of C. pneumoniae in atherosclerotic middle cerebral arteries supports its potential involvement in cerebrovascular diseases.
- This finding provides evidence for the bacterium's role in both acute and chronic cerebrovascular conditions.
- Further research is warranted to elucidate the exact mechanisms of C. pneumoniae in cerebrovascular pathogenesis.
Background And Purpose:
Atherosclerotic middle cerebral arteries are frequent sites of thrombosis, leading to stroke. Previous studies have suggested a role for Chlamydia pneumoniae in the pathogenesis of atherosclerosis. However, the presence of this pathogen in atherosclerotic middle cerebral arteries has heretofore not been documented. In the present study, we analyzed atheromatous plaques from middle cerebral arteries for the presence of C pneumoniae.
Methods:
Atherosclerotic middle cerebral arteries from 15 cadavers who died of natural causes and corresponding nonatherosclerotic arteries from 4 otherwise healthy trauma victims were examined. Assays for C pneumoniae DNA were carried out by nested polymerase chain reaction (nPCR) specific for the C pneumoniae ompA gene. The presence of the bacterium was assessed by transmission electron microscopy.
Results:
Five of the 15 atherosclerotic arterial samples and none of the control tissues were positive for C pneumoniae by nPCR. Particles similar in morphology and size to C pneumoniae elementary bodies were detected by transmission electron microscopy in 4 of the 5 nPCR-positive atherosclerotic samples.
Conclusions:
The demonstration of C pneumoniae in atherosclerotic middle cerebral arteries is consistent with the hypothesis that this bacterium is involved in acute and chronic cerebrovascular diseases.