Nicotine Overrides DNA Damage-Induced G1/S Restriction in Lung Cells
2011
Nicotine and DNA Damage in Lung Cells
Sample size: 5
publication
Evidence: moderate
Author Information
Author(s): Nishioka Takashi, Yamamoto Daisuke, Zhu Tongbo, Guo Jinjin, Kim Sung-Hoon, Chen Chang Yan
Primary Institution: Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School
Hypothesis
How does nicotine affect the DNA damage response in lung epithelial cells?
Conclusion
Nicotine can override DNA damage checkpoints in lung cells, potentially increasing cancer risk.
Supporting Evidence
- Nicotine treatment increased cyclin D1 and A levels in DNA-damaged cells.
- Chk2 phosphorylation was inhibited by nicotine in response to DNA damage.
- Knockdown of cyclin D1 or Chk2 blocked the nicotine-mediated effect on DNA damage response.
Takeaway
Nicotine can help lung cells grow even when they are damaged, which might make cancer more likely.
Methodology
The study used murine and human lung epithelial cells to analyze the effects of nicotine on DNA damage response through various assays.
Participant Demographics
Murine and human lung epithelial cells were used in the study.
Statistical Information
P-Value
<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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