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Updated: Mar 8, 2026
In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
Role of miR-647 in human gastric cancer suppression
Wenlong Cao1, Weiyuan Wei1, Zexu Zhan1
1Department of Surgery, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China.
Abstract:
MicroRNAs (miRNAs) regulate various oncogenes concomitantly, resulting in tumor suppression. They regulate proliferation and migration pathways in tumor development, suggesting a potential therapeutic role. In the present study, we found that miR-647 was markedly downregulated in gastric cancer (GC), and was significantly correlated with reduced tumor size and metastasis. In addition, miR-647 was also reduced in GC cell lines. Furthermore, overexpression of miR-647 in the GC cell lines inhibited cell proliferation, promoted cell cycle arrest at the G0/G1 phase and induced cell apoptosis. miR-647 also significantly inhibited tumor growth in vivo. Notably, we found that miR-647 overexpression suppressed the migration and invasion of the cancer cells, particularly liver metastasis in nude mice. miR-647 also reduced the expression levels of genes associated with proliferation and metastasis in tumors, including ANK2, FAK, MMP2, MMP12, CD44 and SNAIL1. Overall, our findings demonstrated that miR-647 exerts powerful antitumorigenic effects in vitro and in vivo, and may represent a promising therapeutic agent against GC.
Insights
MicroRNA 647 (miR-647) is downregulated in gastric cancer (GC), suppressing tumor growth and metastasis. Restoring miR-647 inhibits cancer cell proliferation, migration, and invasion, offering a potential therapeutic strategy for GC.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are crucial regulators of oncogenes and tumor suppressors.
- Dysregulation of miRNAs is implicated in various cancers, including gastric cancer (GC).
- miRNAs influence key pathways in tumor development, such as proliferation and migration.
Purpose of the Study:
- To investigate the role of miR-647 in gastric cancer.
- To determine the therapeutic potential of miR-647 in GC.
Main Methods:
- Analysis of miR-647 expression levels in GC tissues and cell lines.
- Overexpression of miR-647 in GC cell lines in vitro.
- Assessment of cell proliferation, cell cycle, and apoptosis.
- In vivo studies using nude mice to evaluate tumor growth and metastasis.
- Measurement of target gene expression (ANK2, FAK, MMP2, MMP12, CD44, SNAIL1).
Main Results:
- miR-647 was significantly downregulated in GC tissues and cell lines.
- miR-647 expression correlated with reduced tumor size and metastasis.
- Overexpression of miR-647 inhibited GC cell proliferation, induced G0/G1 cell cycle arrest, and promoted apoptosis.
- miR-647 suppressed tumor growth, migration, invasion, and liver metastasis in vivo.
- miR-647 reduced the expression of proliferation and metastasis-associated genes (ANK2, FAK, MMP2, MMP12, CD44, SNAIL1).
Conclusions:
- miR-647 exhibits potent antitumorigenic effects in gastric cancer.
- miR-647 acts as a tumor suppressor by inhibiting proliferation, migration, and invasion.
- miR-647 represents a promising therapeutic candidate for gastric cancer treatment.
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