Chromosomal alterations in atherosclerotic plaques.

Area of Science:

• Cardiovascular Biology
• Genetics
• Pathology

Background:

• Atherosclerosis progression involves complex cellular and genetic changes.
• Alterations in chromosomes 7 and 11 have been implicated in cardiovascular disease.

Purpose of the Study:

• To investigate chromosome 7 and 11 alterations and FGF-3 gene amplification in carotid endarterectomy specimens.
• To correlate these genetic changes with plaque stability in atherosclerosis.

Main Methods:

• Analysis of 23 carotid endarterectomy specimens.
• Utilized histological staining, immunophenotyping, and fluorescence in situ hybridization (FISH).
• Examined chromosomes 7, 11, and FGF-3 gene status in stable and unstable plaques.

Main Results:

• Unstable plaques (n=18) showed trisomy and tetrasomy of chromosome 7, monosomy of chromosome 11, and FGF-3 gene amplification.
• Stable plaques (n=5) and normal arterial walls exhibited no chromosomal alterations.
• Chromosome 3 ploidy remained normal across all sample types.

Conclusions:

• Chromosome 7 and 11 alterations and FGF-3 gene amplification are associated with unstable atherosclerotic plaques.
• These genetic anomalies may play a role in the transition of stable to complicated plaques.
• Findings suggest potential biomarkers for plaque instability and cardiovascular risk.