NIK Regulates Histone Acetylation in Response to Cigarette Smoke and TNFα
Author Information
Author(s): Chung Sangwoon, Sundar Isaac K., Hwang Jae-Woong, Yull Fiona E., Blackwell Timothy S., Kinnula Vuokko L., Bulger Michael, Yao Hongwei, Rahman Irfan
Primary Institution: University of Rochester Medical Center
Hypothesis
CS and TNFα increase NIK levels causing phosphorylation of IKKα, which leads to histone acetylation.
Conclusion
NIK plays a novel role in mediating cigarette smoke and TNFα-induced histone acetylation, particularly on histone H3K9.
Supporting Evidence
- Cigarette smoke exposure increased NIK levels in human lung epithelial cells.
- NIK was recruited to the promoters of pro-inflammatory genes in response to cigarette smoke.
- Histone acetylation was significantly reduced in cells with NIK knockdown.
- Patients with COPD showed increased levels of NIK and phosphorylated IKKα in lung tissues.
- NIK mediates the effects of cigarette smoke on histone modifications.
Takeaway
When people smoke, a protein called NIK helps change how certain genes are turned on, which can lead to lung problems.
Methodology
The study used human lung epithelial cells and mouse models to investigate the effects of cigarette smoke and TNFα on histone acetylation and NIK activation.
Potential Biases
Potential biases may arise from the selection of animal models and the specific conditions under which experiments were conducted.
Limitations
The study primarily focused on in vitro and in vivo models, which may not fully replicate human responses.
Participant Demographics
The study included 37 subjects: 10 life-long non-smokers, 10 current smokers with normal lung function, and 9 patients with COPD.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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