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Updated: Sep 2, 2025

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
Co-targeting of specific epigenetic regulators in combination with CDC7 potently inhibit melanoma growth
Suresh Chava1, Suresh Bugide1, Parmanand Malvi1
1Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35233, USA.
Abstract:
Melanoma is a highly aggressive skin cancer that frequently metastasizes, but current therapies only benefit some patients. Here, we demonstrate that the serine/threonine kinase cell division cycle 7 (CDC7) is overexpressed in melanoma, and patients with higher expression have shorter survival. Transcription factor ELK1 regulates CDC7 expression, and CDC7 inhibition promotes cell cycle arrest, senescence, and apoptosis, leading to inhibition of melanoma tumor growth and metastasis. Our chemical genetics screen with epigenetic inhibitors revealed stronger melanoma tumor growth inhibition when XL413 is combined with the EZH2 inhibitor GSK343 or BRPF1/2/3 inhibitor OF1. Mechanistically, XL413 with GSK343 or OF1 synergistically altered the expression of tumor-suppressive genes, leading to higher apoptosis than the single agent alone. Collectively, these results identify CDC7 as a driver of melanoma tumor growth and metastasis that can be targeted alone or in combination with EZH2 or BRPF1/2/3 inhibitors.
Insights
Targeting cell division cycle 7 (CDC7) kinase, overexpressed in melanoma, inhibits tumor growth and metastasis. Combining CDC7 inhibition with epigenetic drugs like GSK343 or OF1 enhances anti-melanoma effects.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- Melanoma is an aggressive skin cancer with frequent metastasis.
- Current therapies offer limited benefit to some melanoma patients.
- The role of cell division cycle 7 (CDC7) kinase in melanoma progression is not fully understood.
Purpose of the Study:
- To investigate the role of CDC7 in melanoma.
- To evaluate CDC7 inhibition as a therapeutic strategy for melanoma.
- To identify potential combination therapies for melanoma targeting CDC7.
Main Methods:
- Assessed CDC7 expression in melanoma patient samples.
- Utilized a chemical genetics screen with epigenetic inhibitors (GSK343, OF1).
- Investigated the effects of CDC7 inhibition on cell cycle, senescence, apoptosis, tumor growth, and metastasis.
Main Results:
- CDC7 is overexpressed in melanoma, correlating with shorter patient survival.
- CDC7 inhibition induces cell cycle arrest, senescence, and apoptosis, suppressing melanoma growth and metastasis.
- Combination of CDC7 inhibitor XL413 with EZH2 inhibitor GSK343 or BRPF1/2/3 inhibitor OF1 demonstrated synergistic anti-melanoma effects.
- Combined treatment upregulated tumor-suppressive genes, leading to increased apoptosis.
Conclusions:
- CDC7 is a key driver of melanoma tumor growth and metastasis.
- Targeting CDC7 alone or in combination with EZH2 or BRPF1/2/3 inhibitors is a promising therapeutic strategy for melanoma.
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