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Differential gene expression in primary and recurrent carotid stenosis
Kenneth J Woodside1, Ambrosio Hernandez, Farin W Smith
1Division of Vascular Surgery, Department of Surgery, The University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555-0541, USA.
Biochemical and Biophysical Research Communications
|March 5, 2003
Summary
Cellular apoptosis in atherosclerotic plaques can cause instability. This study identified specific gene expression patterns in primary and recurrent lesions, revealing pathways that influence cell death and plaque vulnerability.
Area of Science:
- Cardiovascular Biology
- Molecular Pathology
- Genomics
Background:
- Complex atherosclerotic plaques are prone to instability and rupture due to cellular apoptosis.
- Understanding the molecular mechanisms driving apoptosis in plaque is crucial for predicting and managing cardiovascular events.
Purpose of the Study:
- To identify gene expression patterns associated with apoptosis in primary and recurrent atherosclerotic lesions.
- To elucidate signaling pathways that confer susceptibility or resistance to apoptosis in carotid plaques.
Main Methods:
- Immunohistochemistry and cDNA microarray analysis were performed on human carotid endarterectomy specimens.
- Analysis focused on identifying differential gene expression in primary plaques and recurrent fibrointimal lesions.
Main Results:
- Active caspase 3 expression was observed in macrophages, lymphocytes, and smooth muscle cells within primary plaques.
- Increased expression of IGFR2, DR4, DAPK1, Bak, and ERK 1/2 was noted in primary plaques.
- Recurrent lesions showed decreased expression of 13 genes, including IGFBP2 and IGFBP3, compared to normal tissue.
Conclusions:
- Gene expression profiling reveals distinct apoptotic patterns in primary and recurrent atherosclerotic lesions.
- These findings highlight key signaling pathways involved in regulating cellular apoptosis and plaque stability.