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Published on: December 23, 2022
[p16 gene suppresses growth of human esophageal carcinoma cells]
1Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100021.
Objective:
To explore the effect of p16 gene on the growth inhibition of esophageal carcinoma cell line NEC.
Methods:
The full length of wild-type p16 cDNA was transfected into the esophageal carcinoma cell line of human fetus induced by N-methyl-N-benzylnitrosamine (NMBzA). In these esophageal carcinoma cell, p16 gene was homozygously deleted.
Results:
Expression of exogenous p16 gene in NEC cells was identified by dot blot and Western blot analyses. The growth rate of NEC transfected with p16 gene (NEC-p16) was markedly suppressed. Colony formation in soft agar was also decreased significantly. Cell cycle analysis by flow cytometry showed that the number of cells in G1-G0 phase of NEC-p16 cells was significantly increased while cells in S and G2 + M phase was decreased compared to that of the control NEC cells.
Conclusion:
Transduction of wild type p16 gene into p16 gene-depleted esophageal cancer cells can restore its suppressive effect on cell growth by arrest of cell cycle at G1 phase.
Insights
Restoring the p16 gene in esophageal cancer cells (NEC) significantly inhibits tumor growth. This is achieved by arresting the cell cycle at the G1 phase, offering a potential therapeutic strategy.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Context:
- Esophageal carcinoma is a significant global health concern.
- The p16 gene is a known tumor suppressor.
- Loss of p16 gene function is implicated in various cancers, including esophageal carcinoma.
Purpose:
- To investigate the therapeutic potential of reintroducing the wild-type p16 gene into esophageal carcinoma cells.
- To determine the effect of p16 gene restoration on cell proliferation and cell cycle progression in NEC cells.
Summary:
- Wild-type p16 cDNA was successfully transfected into NEC cells lacking functional p16.
- Transfected NEC cells (NEC-p16) exhibited significantly reduced growth rates and colony formation.
- Flow cytometry analysis revealed cell cycle arrest at the G1 phase in NEC-p16 cells, with decreased S and G2+M phase populations.
Impact:
- Restoring p16 gene function can suppress esophageal carcinoma cell growth.
- p16 gene therapy holds promise for treating esophageal cancer by inducing cell cycle arrest.
- This study provides a foundation for developing targeted therapies for p16-deficient esophageal tumors.
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