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Updated: Aug 30, 2025

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
Published on: June 6, 2017
CDK4: a master regulator of the cell cycle and its role in cancer
Stacey J Baker1, Poulikos I Poulikakos1,2, Hanna Y Irie1,3
1Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, Levy Place, NY 10029, USA.
Abstract:
The cell cycle is regulated in part by cyclins and their associated serine/threonine cyclin-dependent kinases, or CDKs. CDK4, in conjunction with the D-type cyclins, mediates progression through the G1 phase when the cell prepares to initiate DNA synthesis. Although Cdk4-null mutant mice are viable and cell proliferation is not significantly affected in vitro due to compensatory roles played by other CDKs, this gene plays a key role in mammalian development and cancer. This review discusses the role that CDK4 plays in cell cycle control, normal development and tumorigenesis as well as the current status and utility of approved small molecule CDK4/6 inhibitors that are currently being used as cancer therapeutics.
Insights
Cyclin-dependent kinase 4 (CDK4) regulates cell cycle progression and development. This review covers CDK4
Area of Science:
- Molecular Biology
- Cell Biology
- Biochemistry
Background:
- The cell cycle is regulated by cyclins and cyclin-dependent kinases (CDKs).
- CDK4, with D-type cyclins, drives progression through the G1 phase, preparing cells for DNA synthesis.
- While compensatory mechanisms exist in Cdk4-null mice, CDK4 is crucial for mammalian development and cancer.
Purpose of the Study:
- To review the critical role of CDK4 in cell cycle control.
- To discuss CDK4's involvement in normal development and cancer.
- To summarize the therapeutic applications of CDK4/6 inhibitors in cancer treatment.
Main Methods:
- Literature review of scientific articles and clinical studies.
- Analysis of data on CDK4 function in cell cycle regulation.
- Examination of the efficacy of CDK4/6 inhibitors in cancer therapy.
Main Results:
- CDK4 is essential for G1 phase progression and DNA replication.
- Dysregulation of CDK4 contributes to tumorigenesis.
- Approved CDK4/6 inhibitors demonstrate significant utility as cancer therapeutics.
Conclusions:
- CDK4 plays a vital role in cell cycle regulation, development, and cancer.
- Targeting CDK4/6 with small molecule inhibitors is an effective cancer treatment strategy.
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