Bacterial profile in human atherosclerotic plaques

Area of Science:

• Cardiovascular Research
• Microbiology
• Genetics

Background:

• Bacterial DNA is found in atherosclerotic plaques, but its role in plaque stability is unknown.
• Investigating differences in bacterial profiles between asymptomatic and symptomatic patients is crucial.

Purpose of the Study:

• To compare bacterial DNA profiles in atherosclerotic plaques from asymptomatic versus symptomatic patients.
• To analyze microbial composition differences within distinct plaque regions.

Main Methods:

• Atherosclerotic plaques were collected from patients undergoing endarterectomy.
• Bacterial DNA was analyzed using 16S rRNA gene pyrosequencing and qPCR.
• Plaques were sectioned into three regions (A, B, C) based on stenosis.

Main Results:

• Bacterial DNA load was consistent across patient groups and plaque regions.
• No significant differences in microbial composition (phyla, family, OTU) were observed.
• Unweighted UniFrac analysis showed no distinct clustering by patient group or plaque region.

Conclusions:

• Bacterial DNA amount and composition do not significantly differ between asymptomatic and symptomatic patients.
• Microbial differences within plaque regions are not a major factor in plaque vulnerability.
• Other factors likely play a more significant role in determining atherosclerotic plaque stability.