Gene Expression Changes in Small Airway Epithelium Due to Smoking
Author Information
Author(s): Tilley Ann E., O'Connor Timothy P., Hackett Neil R., Strulovici-Barel Yael, Salit Jacqueline, Amoroso Nancy, Zhou Xi Kathy, Raman Tina, Omberg Larsson, Clark Andrew, Mezey Jason, Crystal Ronald G.
Primary Institution: Weill Cornell Medical College
Hypothesis
Assessment of small airway epithelium genome-wide gene expression would permit biologic phenotyping of the smoking response.
Conclusion
The small airway epithelium transcriptome can classify clinically healthy smokers into subgroups with different responses to cigarette smoking.
Supporting Evidence
- Healthy smokers showed significant variability in small airway epithelial gene expression.
- The index of small airway epithelium gene expression (ISAE) was developed to quantify smoking response.
- High responder smokers had gene expression profiles indistinguishable from COPD smokers.
Takeaway
Some smokers' lungs react more strongly to smoking than others, even if they seem healthy. This study helps to understand those differences.
Methodology
Small airway epithelium was obtained via bronchoscopy and analyzed using microarray to identify differentially expressed genes.
Potential Biases
Potential selection bias in recruiting healthy smokers and COPD patients.
Limitations
The study's findings need to be replicated in other populations and may not capture all biological aspects of COPD.
Participant Demographics
The study included 47 healthy nonsmokers, 58 healthy smokers, and 22 smokers with COPD, with a predominance of males.
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website