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Updated: Jun 26, 2026

Evaluating the Effectiveness of Cancer Drug Sensitization In Vitro and In Vivo
Published on: February 6, 2015
Validating cancer drug targets
John D Benson1, Ying-Nan P Chen, Susan A Cornell-Kennon
1Novartis Institutes for BioMedical Research, 250 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Abstract:
A cancer drug target is only truly validated by demonstrating that a given therapeutic agent is clinically effective and acts through the target against which it was designed. Nevertheless, it is desirable to declare an early-stage drug target as 'validated' before investing in a full-scale drug discovery programme dedicated to it. Although the outcome of validation studies can guide cancer research programmes, strictly defined universal validation criteria have not been established.
Insights
Validating cancer drug targets requires demonstrating clinical effectiveness. However, universally accepted criteria for early-stage target validation are still lacking, despite their utility in guiding research.
Area of Science:
- Oncology
- Pharmacology
- Biomedical Research
Background:
- True validation of a cancer drug target relies on clinical efficacy of a therapeutic agent acting via that target.
- Early-stage target validation is desirable to guide drug discovery investments.
- Current validation studies inform cancer research but lack universal criteria.
Purpose of the Study:
- To discuss the concept and desirability of early-stage cancer drug target validation.
- To highlight the gap in established, universal criteria for target validation.
- To underscore the importance of validation outcomes in cancer research.
Main Methods:
- Literature review and conceptual analysis of drug target validation principles.
- Discussion of the relationship between target validation and clinical drug development.
- Analysis of the current state of validation criteria in cancer research.
Main Results:
- Clinical effectiveness and on-target action are the ultimate validation metrics for cancer drug targets.
- Early validation is a practical goal, but lacks standardized, universal criteria.
- Existing validation studies offer guidance but are not universally defined.
Conclusions:
- Defining universal criteria for early-stage cancer drug target validation remains an unmet need.
- While clinical validation is definitive, early indicators are crucial for efficient drug discovery.
- Further development of standardized validation methodologies is essential for advancing cancer therapeutics.
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