Related Experiment Video

Updated: Jul 25, 2025

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
12:02

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols

Published on: June 6, 2017

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Molecular portraits of cell cycle checkpoint kinases in cancer evolution, progression, and treatment responsiveness

Elena Oropeza1,2, Sinem Seker1,2, Sabrina Carrel1,2

  • 1Aging and Cancer Immunology, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.

Science Advances
|June 30, 2023
PubMed

Insights

The way cell cycle checkpoints are disrupted impacts breast cancer characteristics. Different disruptions influence cancer subtype, metastasis, and treatment response, suggesting new diagnostic approaches.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Cell cycle dysregulation is fundamental to cancer development.
  • The specific mechanisms of cell cycle dysregulation and their impact on cancer characteristics remain unclear.

Purpose of the Study:

  • To investigate how different modes of cell cycle checkpoint dysregulation influence the characteristics of estrogen receptor-positive/human epidermal growth factor receptor 2-negative (ER+/HER2-) breast cancer.
  • To determine if the mode of cell cycle dysregulation affects cancer subtype, metastatic potential, and treatment resistance.

Main Methods:

  • Comprehensive analysis of patient data.
  • Experimental investigations.
  • Statistical analysis of mutation enrichment and survival data.

Main Results:

  • ATM mutations are linked to primary ER+/HER2- cancer in older women.
  • CHK2 dysregulation is associated with metastatic, treatment-resistant ER+/HER2- breast cancer in premenopausal women.
  • ATR/TP53 co-mutation is enriched in ER+/HER2- disease and promotes metastatic progression, with ATR dysregulation inducing metastatic phenotypes in TP53 mutant cells.

Conclusions:

  • The mode of cell cycle dysregulation is a critical determinant of breast cancer subtype, metastatic potential, and therapeutic responsiveness.
  • Findings suggest reconsidering cancer diagnostics based on the specific mechanisms of cell cycle dysregulation.

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