Related Experiment Video
Updated: Jun 9, 2026

Studying Cell Cycle-regulated Gene Expression by Two Complementary Cell Synchronization Protocols
Published on: June 6, 2017
Role of cell-cycle regulatory proteins in gynecological cancer
Karin Milde-Langosch1, Sabine Riethdorf
1Institute of Pathology, Department of Gynecopathology, University Clinics Hamburg-Eppendorf, Hamburg, Germany. milde@uke.uni-hamburg.de
Abstract:
Human malignant tumors are characterized by abnormal proliferation resulting from alterations in cell-cycle regulatory mechanisms. This review summarizes the current knowledge about these aberrations in malignant tumors of the ovary, endometrium, cervix uteri, and vulva. The data indicate that analysis of single cell cycle stimulating or inhibiting proteins partly produces unexpected, apparently paradoxical results, and cell-cycle regulatory pathways should be regarded as a whole in order to identify the molecular mechanisms leading to abnormal tumor cell proliferation. For the papillomavirus (HPV)- associated cervical and vulvar carcinomas, the manifold effects of the viral oncogenes E6 and E7 on cell-cycle control are described.
Insights
Understanding cell cycle regulation is key to fighting cancers. This review examines how cell cycle disruptions drive abnormal proliferation in gynecologic tumors, highlighting the need for a holistic pathway approach.
Area of Science:
- Gynecologic Oncology
- Molecular Biology
- Cell Cycle Regulation
Background:
- Human malignant tumors exhibit abnormal cell proliferation due to altered cell-cycle regulatory mechanisms.
- This review focuses on aberrations in ovarian, endometrial, cervical, and vulvar cancers.
Purpose of the Study:
- To summarize current knowledge on cell-cycle aberrations in gynecologic malignancies.
- To emphasize the importance of viewing cell-cycle regulatory pathways holistically.
Main Methods:
- Review of existing literature on cell-cycle regulation in gynecologic cancers.
- Analysis of data concerning single protein effects versus pathway-level analysis.
Main Results:
- Analyzing individual cell cycle proteins yields paradoxical results.
- A comprehensive pathway-based approach is necessary to understand tumor proliferation.
- Human papillomavirus (HPV) oncogenes E6 and E7 significantly impact cell-cycle control in associated carcinomas.
Conclusions:
- Aberrant cell-cycle regulation is a hallmark of gynecologic cancers.
- Holistic analysis of cell-cycle pathways is crucial for identifying mechanisms of abnormal proliferation.
- Understanding viral oncogene effects is vital for HPV-associated cervical and vulvar cancers.
Related Concept Videos
Negative Regulator Molecules
The Cell Cycle Control System
Positive Regulator Molecules
The Cell Cycle Control System
The Cell Cycle Control System
Cyclins and cyclin-dependent kinases (Cdks) are the primary cell cycle regulators and function at the cell...
Molecular Factors Affecting Cell Division
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...

