miR-219-5p plays a tumor suppressive role in colon cancer by targeting oncogene Sall4
Ji Cheng1, Rui Deng1, Peng Zhang1
1Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, P.R. China.
Abstract:
Sall4 is a novel oncogene found upregulated in several malignancies including colon cancer. However, its upstream regulatory miRNA is still undefined. miR-219-5p is regarded as a tumor-related miRNA in cancer research. Nevertheless, its actual role of whether inhibiting or promoting tumorigenesis is unclear in colon cancer. Potential interaction between Sall4 and miR-219-5p is predicted by TargetScan. CCK-8 test was used for evaluation of cell proliferation and cell survival rates. Western blot analysis and real-time PCR were applied for detection of target molecules. Luciferase assay was a direct confirmation of mutual interaction. Wound healing assay and transwell assay were conducted for cell migration and invasion tests. Flow cytometry was used for cell apoptosis analysis. Tissue specimens and cell lines were explored for miR-219-5p inhibition on colon cancer proliferation, migration, invasion, apoptosis and drug resistance by targeting Sall4. The results show that miR-219-5p inhibited carcinogenesis of colon cancer by targeting oncogene Sall4.
Insights
MicroRNA-219-5p (miR-219-5p) inhibits colon cancer progression by targeting the oncogene Sall4. This study clarifies miR-219-5p
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- Sall4 is a novel oncogene implicated in various cancers, including colon cancer, but its upstream microRNA regulators remain largely unknown.
- MicroRNA-219-5p (miR-219-5p) is a tumor-related microRNA, yet its specific role in colon cancer tumorigenesis is not well-defined.
Purpose of the Study:
- To investigate the regulatory relationship between Sall4 and miR-219-5p in colon cancer.
- To elucidate the functional role of miR-219-5p in colon cancer proliferation, migration, invasion, apoptosis, and drug resistance by targeting Sall4.
Main Methods:
- Bioinformatic prediction (TargetScan) for Sall4-miR-219-5p interaction.
- Cell viability assays (CCK-8), gene expression analysis (Western blot, real-time PCR), and interaction confirmation (luciferase assay).
- Functional assays including wound healing, transwell invasion, and flow cytometry for apoptosis analysis in colon cancer cell lines and tissues.
Main Results:
- miR-219-5p was predicted to interact with Sall4.
- miR-219-5p significantly inhibited colon cancer cell proliferation, migration, and invasion while promoting apoptosis.
- miR-219-5p directly targeted and downregulated the oncogene Sall4 in colon cancer.
Conclusions:
- miR-219-5p acts as a tumor suppressor in colon cancer.
- The inhibitory effect of miR-219-5p on colon cancer is mediated through the direct targeting of Sall4.
- miR-219-5p holds potential as a therapeutic target for colon cancer treatment.
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