An overview of CDK3 in cancer: clinical significance and pharmacological implications
Theodosia Teo1, Sara Kasirzadeh1, Hugo Albrecht1
1Drug Discovery and Development, Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia.
Abstract:
Cyclin-dependent kinase 3 (CDK3) is a major player driving retinoblastoma (Rb) phosphorylation during the G0/G1 transition and in the early G1 phase of the cell cycle, preceding the effects of CDK4/cyclin D, CDK6/cyclin D, and CDK2/cyclin E. CDK3 can also directly regulate the activity of E2 factor (E2F) by skipping the role of Rb in late G1, potentially via the phosphorylation of the E2F1 partner DP1. Beyond the cell cycle, CDK3 interacts with various transcription factors involved in cell proliferation, differentiation, and transformation driven by the epidermal growth factor receptor (EGFR)/rat sarcoma virus (Ras) signaling pathway. The expression of CDK3 is extremely low in normal human tissue but upregulated in many cancers, implying a profound role in oncogenesis. Further evaluation of this role has been hampered by the lack of selective pharmacological inhibitors. Herein, we provide a comprehensive overview about the therapeutic potential of targeting CDK3 in cancer.
Insights
Cyclin-dependent kinase 3 (CDK3) drives cell cycle progression and cancer. Targeting CDK3 offers therapeutic potential for cancer treatment, despite challenges in developing selective inhibitors.
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Background:
- Cyclin-dependent kinase 3 (CDK3) regulates cell cycle transitions, including G0/G1, preceding other CDK/cyclin complexes.
- CDK3 influences transcription factors involved in proliferation and differentiation via pathways like EGFR/Ras.
- CDK3 is upregulated in many cancers but underexpressed in normal tissues, suggesting a role in oncogenesis.
Purpose of the Study:
- To provide a comprehensive overview of Cyclin-dependent kinase 3 (CDK3) and its therapeutic potential in cancer.
- To discuss the role of CDK3 in cell cycle regulation and cancer development.
- To highlight the challenges and opportunities in targeting CDK3 for cancer therapy.
Main Methods:
- Literature review and synthesis of existing research on CDK3.
- Analysis of CDK3's role in cell cycle phases and signaling pathways.
- Discussion of pharmacological inhibition strategies for CDK3.
Main Results:
- CDK3 directly phosphorylates retinoblastoma protein (Rb) and regulates E2F transcription factors.
- CDK3 interacts with key signaling pathways like EGFR/Ras, impacting cell proliferation and transformation.
- Upregulation of CDK3 in cancer, contrasted with its low expression in normal tissues, underscores its oncogenic potential.
Conclusions:
- CDK3 is a promising therapeutic target in oncology due to its critical role in cell cycle control and cancer progression.
- The development of selective CDK3 inhibitors is crucial for realizing its therapeutic potential.
- Targeting CDK3 may offer a novel strategy for treating various types of cancer.
Related Concept Videos
Inhibition of Cdk Activity
M-Cdk Drives Transition Into Mitosis
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
Positive Regulator Molecules
Mitogens and the Cell Cycle
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
mTOR Signaling and Cancer Progression
The mTOR pathway or the...


