Survival prediction of gastric cancer by a seven-microRNA signature

Xiaohua Li ¹, Ying Zhang , Yafei Zhang

⁰State Key Laboratory of Cancer Biology & Xijing Hospital of Digestive Diseases, The Fourth Military Medical University, 17 Changle Western Road, Xi'an, China.

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December 3, 2009

View abstract on PubMed

Summary

A new seven-microRNA (miRNA) signature predicts survival in gastric cancer patients. This molecular signature offers a potential tool for improving treatment decisions and patient outcomes.

Area Of Science

Molecular Oncology
Genomics
Cancer Biomarkers

Background

MicroRNA (miRNA) expression signatures have shown promise in classifying cancer patients prognostically.
No prior studies have established a link between miRNA expression patterns and gastric cancer prognosis.
Gastric cancer remains a significant health challenge, necessitating improved prognostic tools.

Purpose Of The Study

To develop and validate a novel seven-miRNA signature for predicting survival in gastric cancer patients.
To assess the association between miRNA expression patterns and overall survival (OS) and relapse-free survival (RFS).
To determine if the identified miRNA signature can serve as an independent prognostic predictor.

Main Methods

MiRNA expression profiling was conducted using real-time RT-PCR on 100 gastric cancer patients.
Patients were divided into training (50) and testing (50) sets; an independent cohort of 60 patients was also used for validation.
Cox proportional hazard regression and risk-score analysis were employed to identify and validate a seven-miRNA signature.

Main Results

A seven-miRNA signature (miR-10b, miR-21, miR-223, miR-338, let-7a, miR-30a-5p, miR-126) was identified, significantly associated with OS (p=0.0009) and RFS (p=0.0005).
Multivariate analysis confirmed the signature as an independent predictor for OS (HR=3.046, p=0.015) and RFS (HR=3.337, p=0.012).
The prognostic value of the seven-miRNA signature was successfully validated in the testing set and the independent cohort.

Conclusions

The identified seven-miRNA signature demonstrates a strong association with both relapse-free and overall survival in gastric cancer patients.
This molecular signature holds potential as a valuable tool for clinical decision-making regarding gastric cancer treatment.
Further research may lead to the integration of this miRNA signature into routine clinical practice for personalized patient management.

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