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Updated: Aug 30, 2026

An R-Based Landscape Validation of a Competing Risk Model
Published on: September 16, 2022
Target validation
1Department of Molecular Pharmacology and Biological Chemistry, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA. mazarine1643@aol.com
Abstract:
With the publication of draft maps of the human genome and an interim agreement that the human genome comprises approximately 21000 genes, there has been considerable anticipation that many novel disease-specific molecular targets will be rapidly identified and that these will form the basis of many new drug discovery programs. Genes associated with a given disease can thus be identified using genotyping and microarray approaches. However, transitioning from the identification to the subsequent validation and prioritization of their cognate proteins as bona fide drug targets using proteomic techniques--a process that could appropriately be termed targetomics--is still very much in its infancy, with expectations far exceeding present capabilities. The criteria for target validation have yet to be determined and the timing to success has been underestimated. Integrated pharmacological approaches that involve the use of the traditional null hypothesis approach and statistically validated replication have been largely overlooked in the enthusiasm to be the first to find new targets. Inevitably, the only useful measure of target validation occurs when a drug-like molecule, selective for the identified target, is advanced to the clinic where it can be shown to be efficacious in the appropriate human disease state.
Insights
Identifying novel disease targets is advancing, but validating these molecular targets for drug discovery requires more robust methods. Clinical efficacy remains the ultimate measure of successful target validation.
Area of Science:
- Genomics and Proteomics
- Drug Discovery and Development
Background:
- The Human Genome Project has spurred anticipation for identifying new disease-specific molecular targets.
- Current methods for gene identification (genotyping, microarrays) are advancing rapidly.
Purpose of the Study:
- To assess the current state and challenges of validating molecular targets for drug discovery.
- To highlight the gap between target identification capabilities and validation realities.
Main Methods:
- Review of current practices in target identification and validation.
- Discussion of proteomic techniques and their role in target validation (targetomics).
- Emphasis on the need for integrated pharmacological approaches and clinical validation.
Main Results:
- Target validation using proteomic techniques is in its early stages, with capabilities lagging behind expectations.
- Established criteria for target validation are lacking, and timelines for success are underestimated.
- Traditional pharmacological approaches are often overlooked in the pursuit of novel targets.
Conclusions:
- The transition from target identification to validation is a critical bottleneck in drug discovery.
- Clinical efficacy of a drug targeting the validated molecule is the definitive measure of success.
- Future drug discovery efforts must integrate rigorous validation strategies to meet clinical needs.
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