Cell Cycle Dysregulation in Cancer: From Basic Mechanisms to Therapeutic Targeting

A special issue of Cells (ISSN 2073-4409). This special issue belongs to the section "Cell Proliferation and Division".

Deadline for manuscript submissions: 30 November 2026 | Viewed by 1432

Editor


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Guest Editor
Faculty of Pharmacy, Niigata University of Pharmacy and Medical and Life Sciences, Niigata, Japan
Interests: breast cancer; cell cycle regulation; cancer biology

Special Issue Information

Dear Colleagues,

The dysregulation of cell cycles is a fundamental hallmark of cancer, driving uncontrolled cell proliferation and tumorigenesis. The precise coordination of cyclins, cyclin-dependent kinases (CDKs), and cell cycle checkpoints is frequently disrupted in malignant cells, contributing to genomic instability, disease progression, and therapeutic resistance. Therefore, a deeper understanding of the molecular mechanisms underlying cell cycle dysregulation is essential in advancing cancer biology and improving treatment strategies. This includes the use of appropriate experimental and translational models that recapitulate the complexity of cell cycle control in vivo.

This Special Issue will cover recent advances in the molecular pathogenesis of cell cycle dysregulation in cancer, oncogenic signaling pathways affecting cell cycle control, DNA damage response and genomic instability, therapeutic targeting of cyclins, CDKs, and checkpoint regulators, mechanisms of resistance to cell cycle-targeted therapies, and the integration of these approaches into precision oncology.

Prof. Dr. Toshiyuki Sakamaki
Guest Editor

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Keywords

  • cell cycle
  • cancer
  • cyclin-dependent kinases
  • checkpoint control
  • targeted therapy
  • therapeutic resistance
  • precision oncology
  • biomarker

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Published Papers (1 paper)

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Research

21 pages, 11243 KB  
Article
Hepatitis C Virus Core Induces p53 Ser-15 Phosphorylation to Facilitate E6-Associated Protein-Mediated Proteasomal Degradation of p53
by Hyunyoung Yoon, Ji-Min Park, Jiwoo Han, Yerin Kwon and Kyung Lib Jang
Cells 2026, 15(5), 415; https://doi.org/10.3390/cells15050415 - 27 Feb 2026
Viewed by 806
Abstract
The hepatitis C virus (HCV) Core activates the ATM-Chk2 pathway, leading to phosphorylation of p53 at Ser-15, which inhibits mouse double minute 2 (MDM2)-mediated proteasomal degradation. This study reveals that HCV Core also promotes E6-associated protein (E6AP)-mediated degradation of p53 during HCV replication. [...] Read more.
The hepatitis C virus (HCV) Core activates the ATM-Chk2 pathway, leading to phosphorylation of p53 at Ser-15, which inhibits mouse double minute 2 (MDM2)-mediated proteasomal degradation. This study reveals that HCV Core also promotes E6-associated protein (E6AP)-mediated degradation of p53 during HCV replication. In the presence of HCV Core, E6AP expression induced p53 ubiquitination, reduced its stability, and decreased p53 levels, whereas E6AP knockdown increased p53 levels. The E3 ubiquitin ligase activity of E6AP was critical for this process, as demonstrated using the E6AP C833A mutant and the E3 ligase inhibitor Heclin. Proteasomal inhibition with MG132 confirmed that HCV Core and E6AP act together to regulate p53 levels via the proteasome. Importantly, HCV Core-induced p53 phosphorylation was essential for E6AP-mediated degradation, as shown by the impairment of degradation in the presence of the ATM inhibitor KU-55933. E6AP also targeted p53 phosphorylated at Ser-15 by etoposide, as well as phosphomimetic mutants such as p53 S15D, but not non-phosphorylatable mutants such as p53 S15A. These findings suggest that HCV Core-induced p53 phosphorylation enhances E6AP-mediated degradation while preventing MDM2 from targeting p53, thereby maintaining p53 levels that support cell survival, viral replication, and potentially oncogenesis in human hepatocytes. Full article
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