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MicroRNA-374a Expression as a Prognostic Biomarker in Lung Adenocarcinoma
Yeseul Kim1, Jongmin Sim2, Hyunsung Kim1
1Department of Pathology, Hanyang University College of Medicine, Seoul, Korea.
Background:
Lung cancer is the most common cause of cancer-related death, and adenocarcinoma is the most common histologic subtype. MicroRNA is a small non-coding RNA that inhibits multiple target gene expression at the post-transcriptional level and is commonly dysregulated in malignant tumors. The purpose of this study was to analyze the expression of microRNA-374a (miR-374a) in lung adenocarcinoma and correlate its expression with various clinicopathological characteristics.
Methods:
The expression level of miR-374a was measured in 111 formalin-fixed paraffin-embedded lung adenocarcinoma tissues using reverse transcription-quantitative polymerase chain reaction assays. The correlation between miR-374a expression and clinicopathological parameters, including clinical outcome, was further analyzed.
Results:
High miR-374 expression was correlated with advanced pT category (chi-square test, p=.004) and pleural invasion (chi-square test, p=.034). Survival analysis revealed that patients with high miR-374a expression had significantly shorter disease-free survival relative to those with low miR-374a expression (log-rank test, p=.032).
Conclusions:
miR-374a expression may serve as a potential prognostic biomarker for predicting recurrence in early stage lung adenocarcinoma after curative surgery.
Insights
High microRNA-374a (miR-374a) expression in lung adenocarcinoma correlates with advanced disease and shorter survival. This suggests miR-374a may predict recurrence in early-stage lung cancer patients post-surgery.
Area of Science:
- Oncology
- Molecular Biology
- Biomarker Discovery
Background:
- Lung cancer is the leading cause of cancer mortality, with adenocarcinoma being the most prevalent subtype.
- MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression and are often dysregulated in cancers.
- Understanding miRNA roles in lung adenocarcinoma progression is crucial for developing new therapeutic strategies.
Purpose of the Study:
- To investigate the expression levels of microRNA-374a (miR-374a) in lung adenocarcinoma tissues.
- To correlate miR-374a expression with key clinicopathological features and patient outcomes.
- To evaluate miR-374a as a potential prognostic biomarker for lung adenocarcinoma recurrence.
Main Methods:
- Expression of miR-374a was quantified in 111 lung adenocarcinoma tissue samples using reverse transcription-quantitative polymerase chain reaction (RT-qPCR).
- Statistical analyses were performed to correlate miR-374a levels with clinicopathological parameters, including tumor stage (pT) and pleural invasion.
- Disease-free survival was analyzed using Kaplan-Meier curves and log-rank tests to assess the impact of miR-374a expression.
Main Results:
- Elevated miR-374a expression was significantly associated with advanced pT category (p=.004) and the presence of pleural invasion (p=.034).
- Patients exhibiting high miR-374a expression demonstrated significantly shorter disease-free survival compared to those with low expression (p=.032).
- These findings indicate a correlation between high miR-374a levels and more aggressive tumor characteristics and poorer prognosis.
Conclusions:
- miR-374a expression is significantly associated with clinicopathological indicators of advanced lung adenocarcinoma.
- High miR-374a levels correlate with reduced disease-free survival, suggesting a role in tumor recurrence.
- miR-374a may serve as a valuable prognostic biomarker for predicting recurrence risk in early-stage lung adenocarcinoma patients undergoing curative surgery.
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