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Updated: Apr 26, 2026

Kinase Inhibitor Screening In Self-assembled Human Protein Microarrays
Published on: October 23, 2019
Recently targeted kinases and their inhibitors-the path to clinical trials
Stefan Knapp1, Michael Sundström2
1Nuffield Department of Clinical Medicine, Target Discovery Institute, University of Oxford, Oxford OX3 7FZ, UK.
Abstract:
Protein kinases have emerged as one of the most important drug target families for the treatment of cancer. To date, 28 inhibitors with reported activity versus one or multiple kinases have been approved for clinical use. However, the majority of new clinical trials are focused on new subindications using already approved kinase inhibitors or target well validated kinase targets with novel inhibitors. In contrast, relatively few clinical trials have been initiated using specific inhibitors that inhibit novel kinase targets, despite significant validation efforts in the public domain. Analysis of the target validation history of first in class kinase inhibitors revealed a long delay between initial disease association and development of inhibitors. As part of this analysis, we have investigated which first in class inhibitor that entered phase I clinical trials over the last five years and also considered which research approaches that were used to validate them.
Insights
Despite numerous approved kinase inhibitors for cancer, clinical trials often reuse existing drugs or target validated kinases. Few trials explore novel kinase targets, indicating a significant delay in translating research into new cancer therapies.
Area of Science:
- Oncology
- Pharmacology
- Drug Discovery
Background:
- Protein kinases are crucial targets for cancer therapy, with 28 inhibitors approved.
- Current clinical trials predominantly focus on existing kinase inhibitors or well-validated targets.
- Novel kinase targets are underutilized in clinical trials despite extensive research validation.
Purpose of the Study:
- To analyze the target validation history of first-in-class kinase inhibitors.
- To identify first-in-class kinase inhibitors entering Phase I trials in the last five years.
- To examine research approaches used for validating these novel kinase targets.
Main Methods:
- Retrospective analysis of clinical trial data and scientific literature.
- Identification of kinase inhibitors entering Phase I clinical trials.
- Review of target validation strategies and timelines.
Main Results:
- A significant delay exists between initial disease association and the development of kinase inhibitors.
- Limited clinical trials are investigating novel kinase targets, despite substantial public domain validation.
- Analysis focused on inhibitors entering Phase I trials within the last five years.
Conclusions:
- There is a translational gap in developing novel kinase inhibitors for cancer treatment.
- Future research should focus on accelerating the clinical development of inhibitors targeting novel kinase pathways.
- Optimizing target validation and early-phase clinical trial initiation is critical for advancing cancer therapy.
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