Abstract:
Angiogenesis is a highly-controlled process that is dependent on the intricate balance of both promoting and inhibiting factors, involved in various physiological and pathological processes. A comprehensive understanding of the molecular mechanisms that regulate angiogenesis has resulted in the design of new and more effective therapeutic strategies. Due to insufficient sensitivity to detect therapeutic effects by using standard clinical endpoints or by looking for physiological improvement, a multitude of imaging techniques have been developed to assess tissue vasculature on the structural, functional and molecular level. Imaging is expected to provide a novel approach to noninvasively monitor angiogenesis, to optimize the dose of new antiangiogenic agents and to assess the efficacy of therapies directed at modulation of the angiogenic process. All these methods have been successfully used preclinically and will hopefully aid in antiangiogenic drug development in animal studies. In this review article, the application of PET in angiogenesis imaging at both functional and molecular level will be discussed. For PET imaging of angiogenesis related molecular markers, we emphasize integrin alpha(v)beta(3), VEGF/VEGFR, and MMPs.
Insights
Positron emission tomography (PET) offers a novel approach to noninvasively monitor angiogenesis. This imaging technique aids in assessing antiangiogenic therapies by visualizing molecular markers like integrin alpha(v)beta(3), VEGF/VEGFR, and MMPs.
Area of Science:
- Biomedical imaging
- Molecular biology
- Oncology
Background:
- Angiogenesis, the formation of new blood vessels, is crucial in physiological and pathological processes.
- Understanding angiogenesis regulation is key to developing effective therapeutic strategies.
- Standard clinical endpoints often lack sensitivity for evaluating antiangiogenic therapies.
Purpose of the Study:
- To review the application of Positron Emission Tomography (PET) in angiogenesis imaging.
- To highlight PET's role in assessing functional and molecular aspects of angiogenesis.
- To discuss PET's utility in preclinical antiangiogenic drug development.
Main Methods:
- Review of existing literature on PET imaging in angiogenesis.
- Focus on PET's ability to assess tissue vasculature at molecular and functional levels.
- Discussion of specific molecular markers for PET imaging: integrin alpha(v)beta(3), VEGF/VEGFR, and MMPs.
Main Results:
- Imaging techniques, particularly PET, provide sensitive, noninvasive methods to monitor angiogenesis.
- PET enables assessment of molecular targets involved in angiogenesis.
- Preclinical studies demonstrate PET's potential in evaluating antiangiogenic agents.
Conclusions:
- PET imaging is a valuable tool for noninvasively monitoring angiogenesis and assessing antiangiogenic therapies.
- PET allows for the evaluation of angiogenesis at both functional and molecular levels.
- PET imaging holds promise for advancing antiangiogenic drug development through preclinical studies.
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