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Published on: September 16, 2019
PET in anti-cancer drug development and therapy
1Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi-110029, India. rkphulia@hotmail.com
Abstract:
Anti-cancer drug development is a major area of research. Monitoring of response to newer anti-cancer drugs has undergone an evolution from structural imaging modalities to targeting functional metabolic activity at cellular level to better define responsive and non-responsive cancerous tissue. This review article highlights the contribution of Positron Emission Tomography (PET) in this field. PET holds a promising role in the future by providing us information pertaining to the drugs effectiveness early in the course of therapy, so that side effects and expenses can be reduced substantially. PET has been used to measure changes in drug induced metabolism, cellular proliferation and tissue perfusion. Also changes induced by immuno-modulating drugs such as apoptosis, telomere activity, growth factor levels and many more can be studied using specific radiolabelled PET tracers whereas conventional imaging modalities which detect changes in tumor size and residual tissue histopathology may not prove useful in such scenario. In future, most PET scanners will be replaced by Hybrid PET-CT scanners, which provide functional and structural information in the same setting. In addition, PET-CT improves characterization of equivocal lesions and decreases interobserver variability. The most important recent patents concerning role of PET in drug development have been presented.
Insights
Positron Emission Tomography (PET) offers early insights into anti-cancer drug effectiveness, reducing costs and side effects. This functional imaging technique monitors cellular changes, outperforming traditional methods in assessing treatment response.
Area of Science:
- Oncology
- Medical Imaging
- Pharmacology
Background:
- Anti-cancer drug development requires accurate monitoring of treatment response.
- Traditional imaging focuses on structural changes, which may not reflect early drug efficacy.
- Functional imaging offers a cellular-level assessment of drug effectiveness.
Purpose of the Study:
- To review the role of Positron Emission Tomography (PET) in anti-cancer drug development.
- To highlight PET's ability to assess early drug response and reduce patient burden.
- To discuss advancements like hybrid PET-CT scanners in clinical practice.
Main Methods:
- Review of literature on PET applications in anti-cancer drug development.
- Discussion of PET's capability to measure drug-induced metabolism, proliferation, and perfusion.
- Exploration of PET tracers for assessing apoptosis, telomere activity, and growth factor levels.
Main Results:
- PET provides early information on drug effectiveness, enabling timely treatment adjustments.
- Functional imaging with PET can detect therapeutic effects not visible with conventional methods.
- Hybrid PET-CT scanners combine functional and structural data, improving lesion characterization.
Conclusions:
- PET is a valuable tool for monitoring anti-cancer drug response, offering significant advantages over traditional imaging.
- The early assessment of drug efficacy via PET can lead to substantial reductions in side effects and healthcare costs.
- Future anti-cancer drug development will likely integrate PET and PET-CT imaging for comprehensive treatment evaluation.
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