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Updated: May 30, 2026
Establishment and Histological Analysis of Esophageal Organoids Modeling the Progression from Normal to Cancerous Tissues
Published on: May 30, 2025
MicroRNA analysis of microdissected normal squamous esophageal epithelium and tumor cells
Liang Zhu1, Wusheng Yan, Jaime Rodriguez-Canales
1Pathogenetics Unit, Laboratory of Pathology, Center for Cancer Research, Bethesda, MD, USA.
Abstract:
Previous studies have identified several dysregulated microRNAs in esophageal squamous cell carcinoma (ESCC); however, to date there are no ex vivo analyses comparing expression levels of these regulatory molecules in esophageal squamous cell tumors versus patient-matched normal epithelium. We describe here a technical strategy to evaluate microRNAs in normal esophageal basal cells (NB), normal esophageal differentiated cells (ND), and tumor cells (T). Laser capture microdissection was used to procure target populations from five cases and 18 ESCC-associated microRNAs were measured by RT-qPCR. Five microRNAs (miR-25, miR-106b, miR-21, miR-203, and miR-145) demonstrated consistent differential expression in at least one of the three comparisons: T vs. NB, T vs. ND, or NB vs. ND. The potential regulatory role of the microRNAs in ESCC was further evaluated by correlating their expression with a matched mRNA dataset, which included the same five cases and cell populations. In conclusion, the present work demonstrates the feasibility of studying microRNA levels in precisely dissected cell populations from clinical samples, and sheds light on the molecular mechanisms associated with ESCC.
Insights
This study introduces a method to analyze microRNA expression in esophageal squamous cell carcinoma (ESCC) tissues and matched normal cells. Five specific microRNAs showed differential expression, offering insights into ESCC molecular mechanisms.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Esophageal squamous cell carcinoma (ESCC) is associated with dysregulated microRNAs.
- Previous studies lack ex vivo analyses comparing microRNA expression in ESCC tumors and matched normal esophageal epithelium.
- Understanding microRNA roles in ESCC pathogenesis is crucial.
Purpose of the Study:
- To develop and validate a technical strategy for evaluating microRNA expression in precisely dissected esophageal cell populations.
- To compare microRNA expression levels in normal basal cells (NB), normal differentiated cells (ND), and tumor cells (T) from ESCC patients.
- To identify specific microRNAs with differential expression in ESCC and explore their potential regulatory roles.
Main Methods:
- Utilized laser capture microdissection to isolate NB, ND, and T cell populations from five clinical ESCC samples.
- Quantified the expression of 18 ESCC-associated microRNAs using quantitative reverse transcription polymerase chain reaction (RT-qPCR).
- Correlated microRNA expression data with a matched mRNA dataset from the same cell populations and cases.
Main Results:
- Successfully established a feasible method for studying microRNA levels in microdissected clinical esophageal samples.
- Identified five microRNAs (miR-25, miR-106b, miR-21, miR-203, and miR-145) with consistent differential expression between NB, ND, and T cells.
- Demonstrated differential expression in comparisons of tumor versus normal basal cells (T vs. NB), tumor versus normal differentiated cells (T vs. ND), and normal basal versus normal differentiated cells (NB vs. ND).
Conclusions:
- The study confirms the feasibility of analyzing microRNA expression in specific cell populations from clinical esophageal specimens.
- The identified differentially expressed microRNAs (miR-25, miR-106b, miR-21, miR-203, miR-145) are potential key players in ESCC development.
- This research provides foundational insights into the molecular mechanisms underlying ESCC pathogenesis through microRNA analysis.
