Related Experiment Video
Updated: Apr 3, 2026

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
Dysregulated miR-645 affects the proliferation and invasion of head and neck cancer cell
Qiang Sun1,2, Shuai Chen1, Xue Zhao3
1Department of Stomatology, The First Affiliated Hospital of Zhengzhou University, No. 1, East Jian she Road, Zhengzhou, 450052 Henan China.
Background And Purpose:
Dysregulated miRNAs play an important role in many malignant tumors. However, elucidating the roles of miRNAs in cancer biology, especially in epithelial cancers, remains an ongoing process. In this study, we identified the differentially expressed miR-645 in the progressing of head and neck squamous cell carcinoma (HNSCC) and investigated its biological function.
Methods:
The association between clinicopathological parameters and the expression levels of the candidated miRNAs were analyzed by using the Kaplan-Meier survival analysis. The cell growth, invasion and migration potential, and clone formation were observed to detect the functions of the miRNAs in HNSCC cells.
Results:
In the 34 HNSCC tissues with lymph node metastasis, the expression level of miR-645 was 0.54 ± 0.12, and the expression level was 0.22 ± 0.05 in the 28 tissues with non lymph node metastasis (p = 0.017). In patients with HNSCC, higher level of miR-645 expression significantly correlates with worse overall survival (p = 0.04). Ectopic expression of miR-645 promoted cell invasion and migration.
Conclusions:
miR-645 play a key role in cell invasion and metastasis and their expression correlates with overall survival in the patients with HNSCC.
Related Concept Videos
MicroRNAs
MicroRNAs
Abnormal Proliferation
Induced Pluripotent Stem Cells
Somatic...
Metastasis
Epithelial-to-Mesenchymal Transition
The epithelial-to-mesenchymal transition or EMT is a developmental process commonly observed in wound healing, embryogenesis, and cancer metastasis. EMT is induced by transforming growth factor-beta (TGF-β) or receptor tyrosine kinase (RTK) ligands, which further...
Tumor Progression
Colon cancer is one of the best-documented examples of tumor progression. Early mutation in the APC gene in colon cells causes a small growth on the colon wall called a polyp. With time, this polyp grows into a benign, pre-cancerous tumor. Further...

