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Biomarkers in the prevention and treatment of atherosclerosis: need, validation, and future
James H Revkin1, Charles L Shear, Hubert G Pouleur
1Pfizer Global Research and Development, 50 Pequot Ave., Mailstop-6025-A4115, New London, CT 06320, USA. james.h.revkin@pfizer.com
Insights
Novel imaging techniques like carotid intima-media thickness and atheroma volume measurement can serve as effective surrogate markers for cardiovascular disease (CVD) progression in clinical trials, potentially accelerating drug development.
Area of Science:
- Cardiovascular Medicine
- Medical Imaging
- Clinical Trials
Background:
- Cardiovascular disease (CVD) is a major cause of death globally, necessitating new therapeutic strategies.
- Current clinical trials for CVD drugs rely on long-term cardiovascular outcomes, requiring large patient cohorts and extended follow-up periods.
Purpose of the Study:
- To explore the utility of surrogate markers for CVD progression in clinical trials.
- To evaluate advanced imaging techniques as potential replacements for traditional cardiovascular outcomes.
Main Methods:
- Review of quantitative coronary angiography as a traditional method for assessing atherosclerotic progression.
- Discussion of B-mode ultrasound for carotid intima-media thickness measurement.
- Exploration of intravascular ultrasound for atheroma volume quantification.
Main Results:
- Quantitative coronary angiography has limitations in assessing atherosclerotic progression.
- Carotid intima-media thickness and atheroma volume measurement are emerging as accurate techniques.
- These advanced imaging methods show promise as surrogate endpoints.
Conclusions:
- Utilizing surrogate markers like intima-media thickness and atheroma volume can shorten clinical trials.
- This approach may facilitate faster development of novel cardiovascular therapies.
- Advanced imaging techniques offer a more efficient pathway for evaluating new CVD treatments.
Abstract:
Cardiovascular disease (CVD) remains one of the leading causes of morbidity and mortality in the developed world, and there is a clear need to develop novel therapeutic strategies to reduce cardiovascular risk further than is currently possible. Traditionally, the effectiveness of new cardiovascular drugs has been evaluated in clinical trials using cardiovascular outcomes as endpoints. However, such trials require large numbers of patients followed over long periods of time. Clinical trials using surrogate markers for CVD may be shorter in duration and involve fewer participants. Measurement of atherosclerotic progression is an ideal surrogate marker as it is predictive of future cardiovascular events. The "gold standard" for detecting and defining the severity, extent, and rate of atherosclerotic progression has been quantitative coronary angiography. However, this technique has fundamental limitations. More recently, measurement of carotid intima-media thickness using B-mode ultrasound and measurement of atheroma volume using intravascular ultrasound have emerged as more accurate techniques for detecting atherosclerotic progression. Both of these techniques have potential utility as surrogate endpoints in place of cardiovascular outcomes in clinical trials. Their use might facilitate the more rapid development of novel, safe, and effective therapies.
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