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Updated: Aug 23, 2026

Through the Looking Glass: Time-lapse Microscopy and Longitudinal Tracking of Single Cells to Study Anti-cancer Therapeutics
Published on: May 14, 2016
[Apoptin induces G2-M arrest in cancer cells]
Xiang-jun He1, Shi-tong Shang, Yu-jing Liu
1Central Laboratory, Peking University People's Hospital, Beijing 100044, China. hexiangjun@hotmail.com
Objective:
To further study the effect of apoptin in inducing cancer cell specific apoptosis and the possible applications in cancer therapy.
Methods:
Apoptin gene was amplified by PCR and inserted into pcDNA3.1(+) with a FLAG tag in front of the multi-cloning-site. Apoptin gene with the FLAG tag was sub-cloned into an adenovirus vector. Several cancer cell lines were transfected with pcDNA3.1/FLAG/apoptin or infected with apoptin containing recombinant adenoviruses to study the morphologic changes. Ad/apoptin infected cells were also analyzed by flowcytometry after staining with PI.
Results:
Expressed apoptin was localized in the nucleus of cancer cells. Chromatin condensation occurred 2 or 3 days after Ad/apoptin(+) infection. Cell number in G(2)-M phase increased dramatically after Ad/apoptin(+) infection.
Conclusion:
Apoptin can induce cell cycle G(2)-M arrest and chromatin condensation in cancer cells.
Insights
Apoptin effectively induces cancer cell apoptosis by causing chromatin condensation and G2-M cell cycle arrest, showing promise for targeted cancer therapy.
Area of Science:
- Molecular Biology
- Cancer Research
- Virology
Context:
- Apoptin is a protein with demonstrated tumor-specific activity.
- Understanding its mechanism is crucial for developing novel cancer therapies.
- Adenovirus vectors offer efficient delivery for gene-based treatments.
Purpose:
- To investigate the mechanism of apoptin-induced cancer cell apoptosis.
- To evaluate the application of apoptin in cancer therapy using recombinant adenoviruses.
Summary:
- Apoptin gene was cloned into an adenovirus vector (Ad/apoptin).
- Cancer cells infected with Ad/apoptin exhibited nuclear localization of apoptin.
- Morphological changes, including chromatin condensation and G2-M cell cycle arrest, were observed.
Impact:
- Apoptin induces cancer cell-specific apoptosis through cell cycle arrest.
- This study supports the potential of apoptin as a targeted cancer therapeutic agent.
- Further research can explore optimizing Ad/apoptin delivery and efficacy.
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