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Updated: Jun 22, 2026
Profiling of Pre-micro RNAs and microRNAs using Quantitative Real-time PCR (qPCR) Arrays
Published on: December 3, 2010
Expression profiling of micro-RNAs in human esophageal squamous cell carcinoma using RT-PCR
Ryo Ogawa1, Hideyuki Ishiguro, Yoshiyuki Kuwabara
1Department of Oncology, Immunology, and Surgery, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601, Japan.
Abstract:
To develop novel therapeutic and diagnostic methods for esophageal cancer, it is important to understand the precise biological mechanism. Micro-RNAs (miRNAs) seem to be crucial factors in diverse regulation pathways. In this study, we analyzed the expression of mature miRNAs in esophageal squamous cell carcinoma (ESCC). The expression of 73 miRNAs was quantified by qRT-PCR in 30 primary ESCC specimens. We examined the correlation between miRNA expressions and the clinicopathological factors and prognosis of ESCC. The Kaplan-Meier survival curves showed that the high expression levels of 6 of the 72 miRNAs correlated with significantly lower patient survival rates. The overexpression of miR-129 was identified as a significant and independent prognostic factor (P = 0.031) in surgically treated ESCC patients. The hazard ratio for the prediction of early death was 18.11 for high versus low expression levels of miR-129. Similar results were obtained from an analysis performed on an additional 19 patients (test cohort) (P = 0.0057, for training cohort; P = 0.011, for test cohort; log-rank test). This experiment supports the notion that the high miR-129 expression levels, as observed in this study, might play a important role in the development of esophageal cancer.
Insights
High levels of micro-RNA-129 (miR-129) correlate with poorer survival in esophageal squamous cell carcinoma (ESCC). This finding suggests miR-129 may be a significant prognostic factor for ESCC patients.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Understanding esophageal cancer's biological mechanisms is key for new therapies.
- Micro-RNAs (miRNAs) are vital regulators in cellular processes.
- Esophageal squamous cell carcinoma (ESCC) requires further investigation into its molecular underpinnings.
Purpose of the Study:
- To analyze mature micro-RNA (miRNA) expression in ESCC.
- To correlate miRNA expression with clinicopathological factors and patient prognosis.
- To identify specific miRNAs as potential prognostic biomarkers for ESCC.
Main Methods:
- Quantitative reverse transcription polymerase chain reaction (qRT-PCR) was used to quantify 73 mature miRNAs.
- Expression levels were analyzed in 30 primary ESCC specimens.
- Kaplan-Meier survival analysis and log-rank tests were employed to assess prognostic significance.
Main Results:
- High expression of 6 out of 72 miRNAs was linked to significantly reduced patient survival.
- Overexpression of miR-129 emerged as a significant, independent prognostic factor in surgically treated ESCC patients.
- A high hazard ratio (18.11) for early death was associated with high miR-129 expression, validated in a separate test cohort.
Conclusions:
- Elevated miR-129 expression is a significant indicator of poor prognosis in ESCC.
- miR-129 may play a crucial role in the development and progression of esophageal cancer.
- These findings support miR-129 as a potential biomarker for esophageal cancer prognosis.
