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Updated: Jun 25, 2025
07:33
In vitro Organoid Culture of Primary Mouse Colon Tumors
Published on: May 17, 2013
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TCF7L1 regulates colorectal cancer cell migration by repressing GAS1 expression.
Carli M King1,2, Wei Ding1, Melanie A Eshelman1,2
1Department of Surgery, Division of Colon and Rectal Surgery, The Pennsylvania State University College of Medicine, Hershey, PA, 17033, USA.
Scientific Reports
|May 30, 2024
Summary
Dysregulated Wnt/β-catenin signaling drives colorectal cancer (CRC) progression. This study reveals TCF7L1 represses GAS1, promoting CRC cell migration and invasion.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- Wnt/β-catenin signaling is frequently dysregulated in colorectal cancer (CRC).
- The T-cell factor/lymphoid enhancer factor (TCF) transcription factor family regulates Wnt/β-catenin target genes.
- TCF7L1, a TCF family member, primarily acts as a transcriptional repressor and has an established oncogenic role in CRC.
Purpose of the Study:
- To investigate the role of TCF7L1 in regulating gene expression related to cellular migration in CRC.
- To identify novel target genes of TCF7L1 in CRC.
- To elucidate the mechanism by which TCF7L1 influences CRC cell phenotypes.
Main Methods:
- Transcriptome analysis of TCF7L1-regulated genes in CRC cell lines.
- Gene silencing and overexpression experiments to assess TCF7L1 function.
- Genome-wide TCF7L1 binding localization and integration with transcriptome data.
- Validation of candidate target genes, including GAS1, using functional assays.
Main Results:
- TCF7L1 expression significantly impacts genes associated with cellular migration.
- TCF7L1 promotes CRC cell migration, invasion, and adhesion.
- GAS1 was identified as a direct target gene of TCF7L1.
- GAS1 mediates TCF7L1-dependent promotion of CRC cell migration.
Conclusions:
- TCF7L1 plays a novel role in enhancing CRC cell migration and invasion.
- TCF7L1 achieves this by repressing the expression of GAS1.
- Targeting the TCF7L1-GAS1 axis may offer therapeutic strategies for CRC.
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