Prognostic Significance of Alpha-1-Antitrypsin in Lung Adenocarcinomas
Author Information
Author(s): M. Higashiyama, O. Doi, K. Kodama, H. Yokouchi, R. Tateishi
Primary Institution: The Center for Adult Diseases, Osaka, Japan
Hypothesis
Does alpha-1-antitrypsin expression in lung adenocarcinomas correlate with prognosis?
Conclusion
Strongly AAT-positive lung adenocarcinomas are associated with poor prognosis.
Supporting Evidence
- 87% of lung adenocarcinoma cases expressed AAT.
- Strongly AAT-positive cases had a 5-year survival rate of 40%.
- Statistical differences in survival rates were observed between AAT-positive and AAT-negative cases.
Takeaway
This study found that most lung cancer patients have a protein called AAT in their tumors, and those with a lot of it tend to do worse than those with less.
Methodology
Immunohistochemical analysis of AAT expression in 102 surgically resected lung adenocarcinoma specimens.
Limitations
The study is limited to a single type of cancer and may not generalize to other cancers.
Participant Demographics
63 men and 39 women, ages 19 to 79 (mean 60.9).
Statistical Information
P-Value
p<0.01 for stage I vs stage II + IIIA + IIIB; p<0.05 for N0 vs N1, 2, 3.
Statistical Significance
p<0.05
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