Related Experiment Video
Updated: Jan 12, 2026
06:09
Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
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CDK12 inhibition reveals melanoma dependence on the RUNX1/CBFβ complex for genomic stability
Jonathan Boucher1, Thibault Houles1, Elsa Berliocchi1
1Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, QC, Canada.
Cell Reports
|November 2, 2025
Summary
Targeting cyclin-dependent kinase 12 (CDK12) in melanoma shows promise. Combining CDK12 inhibitors with RUNX1 inhibition exploits a synthetic lethal vulnerability, suppressing tumor growth.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Cutaneous melanoma, a deadly skin cancer, often involves RAS/mitogen-activated protein kinase (MAPK) pathway hyperactivation.
- Cyclin-dependent kinase 12 (CDK12) is crucial for transcriptional regulation and DNA repair, making it a therapeutic target in MAPK-driven melanoma.
Purpose of the Study:
- To identify vulnerabilities in CDK12-inhibited melanoma.
- To explore combinatorial therapeutic strategies targeting CDK12 and its synthetic lethal partners.
Main Methods:
- Genome-wide CRISPR-Cas9 screening was employed to identify genes synthetically lethal with CDK12.
- Melanoma cell sensitivity to CDK12 inhibitors was assessed following RUNX1 inhibition.
- Tumor growth was evaluated in vivo using combined CDK12 and RUNX1 inhibition.
Main Results:
- The Runt-related transcription factor RUNX1 and its cofactor CBFβ were identified as synthetic lethal partners of CDK12.
- RUNX1 inhibition increased melanoma sensitivity to CDK12 inhibitors, leading to DNA damage and impaired repair, independent of p53.
- Combined inhibition of CDK12 and RUNX1 significantly suppressed melanoma growth in vivo.
Conclusions:
- RUNX1/CBFβ acts as a compensatory mechanism in melanoma treated with CDK12 inhibitors.
- A synthetic lethal interaction between CDK12 and RUNX1/CBFβ offers a promising avenue for combinatorial melanoma therapy.
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