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The RAS-Effector Interaction as a Drug Target
Adam B Keeton1,2, E Alan Salter3, Gary A Piazza4,2
1Drug Discovery Research Center, Mitchell Cancer Institute, University of South Alabama, Mobile, Alabama. akeeton@health.southalabama.edu.
Abstract:
About a third of all human cancers harbor mutations in one of the K-, N-, or HRAS genes that encode an abnormal RAS protein locked in a constitutively activated state to drive malignant transformation and tumor growth. Despite more than three decades of intensive research aimed at the discovery of RAS-directed therapeutics, there are no FDA-approved drugs that are broadly effective against RAS-driven cancers. Although RAS proteins are often said to be "undruggable," there is mounting evidence suggesting it may be feasible to develop direct inhibitors of RAS proteins. Here, we review this evidence with a focus on compounds capable of inhibiting the interaction of RAS proteins with their effectors that transduce the signals of RAS and that drive and sustain malignant transformation and tumor growth. These reports of direct-acting RAS inhibitors provide valuable insight for further discovery and development of clinical candidates for RAS-driven cancers involving mutations in RAS genes or otherwise activated RAS proteins. Cancer Res; 77(2); 221-6. ©2017 AACR.
Insights
RAS proteins are mutated in about a third of human cancers. This review highlights emerging direct-acting inhibitors targeting RAS-effector interactions, offering new hope for treating RAS-driven cancers.
Area of Science:
- Oncology
- Molecular Biology
- Drug Discovery
Background:
- Approximately 33% of human cancers involve mutations in K-, N-, or HRAS genes.
- Mutated RAS proteins are constitutively activated, driving malignant transformation and tumor growth.
- Despite extensive research, no broadly effective FDA-approved drugs exist for RAS-driven cancers, leading to the 'undruggable' classification of RAS proteins.
Purpose of the Study:
- To review evidence supporting the feasibility of developing direct RAS inhibitors.
- To focus on compounds inhibiting RAS-effector interactions.
- To provide insights for developing clinical candidates for RAS-driven cancers.
Main Methods:
- Literature review of studies on direct-acting RAS inhibitors.
- Focus on compounds targeting RAS-effector signaling pathways.
- Analysis of evidence for inhibiting aberrant RAS protein activity.
Main Results:
- Mounting evidence suggests direct RAS inhibition is feasible.
- Compounds inhibiting RAS-effector interactions are a promising therapeutic strategy.
- These inhibitors target key signaling pathways sustaining malignant transformation.
Conclusions:
- Direct inhibitors of RAS proteins show potential for treating RAS-driven cancers.
- Targeting RAS-effector interactions offers a viable approach.
- Further research and development of these inhibitors are crucial for clinical application.
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