Multiple biological predictors for vulnerable carotid lesions

Area of Science:

• Biochemistry
• Immunology
• Vascular Biology

Background:

• Advanced carotid stenosis poses a risk for plaque instability.
• Accurate detection of unstable plaques is crucial for patient management.
• Current diagnostic methods may require enhancement for improved sensitivity.

Purpose of the Study:

• To identify a panel of reliable biomarkers for detecting plaque instability in advanced carotid stenosis.
• To evaluate the diagnostic performance of specific matrix metalloproteinases (MMPs), their inhibitors (TIMPs), and inflammatory factors.
• To establish a multiscore analysis for improved classification of plaque stability.

Main Methods:

• Serum levels of MMPs (MMP-1 to -9), TIMPs (TIMP-1, -2), and inflammatory cytokines (TNF-alpha, IL-1beta, -6, -8, -10, -12) were measured in 101 patients using ELISA.
• Patients were categorized into stable (n=37) and unstable (n=64) plaque groups based on histology.
• Multivariate analysis, including ROC analysis, was employed to determine biomarker significance and optimal cutoff values.

Main Results:

• Significantly elevated serum levels of MMP-1, MMP-7, TIMP-1, TNF-alpha, and IL-8 were observed in patients with unstable plaques compared to stable plaques.
• The combined analysis of MMP-1, MMP-7, TIMP-1, and IL-8 achieved a high positive predictive value (89.4%) for identifying unstable carotid lesions.
• This biomarker panel demonstrated potential for accurate classification of plaque stability through blood analysis.

Conclusions:

• A panel of specific biomarkers, including MMPs and inflammatory factors, can significantly improve the detection of vulnerable carotid plaques.
• Multiscore analysis of these biomarkers offers a promising non-invasive approach for assessing plaque instability in advanced carotid stenosis.
• These findings contribute to better risk stratification and management strategies for patients with carotid artery disease.