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Characterization of Functionally Associated miRNAs in Glioblastoma and their Engineering into Artificial Clusters for Gene Therapy
Published on: October 4, 2019
MiR-429 suppresses glioblastoma multiforme by targeting SOX2
Huixiao Dong1, Xiuzhen Hao1, Benliang Cui1
1Jining First People's Hospital, Jining, Shandong, China.
Abstract:
Accumulating evidence has shown that miR-429 plays an important role in the development and progression of tumour. However, the role of miR-429 in glioblastoma multiforme (GBM) remains largely unknown. The present study is designed to investigate the function of miR-429 in GBM and to explore the molecular mechanism underlying its function. The expression level of miR-429 was detected in GBM tissues and cell lines by quantitative real-time polymerase chain reaction. The effect of overexpression of miR-429 on in vitro cell proliferation, apoptosis and invasion was examined. Western blot analysis was used to detect the influence of miR-429 on the expression of target gene, and Pearson analysis was used to calculate the correlation between the expression of targets gene and the miR-429 in GBM tissues. Our study shows that miR-429 is downregulated in GBM tissues compared with noncancerous tissues (P < .01). In addition, the expression of miR-429 in GBM cell lines is also significantly lower (P < .01). Enforced expression of miR-429 inhibits GBM cells proliferation, induces apoptosis and suppresses invasion and leads to the downregulation of the SOX2 protein. Moreover, the expression level of miR-429 in GBM tissues shows inverse relationship with the expression level of SOX2 protein. Our findings suggest that miR-429 represents a potential tumour-suppressive miRNA and plays an important role in GBM progression by directly targeting SOX2.
Insights
MicroRNA-429 (miR-429) is downregulated in glioblastoma multiforme (GBM), a deadly brain tumor. Restoring miR-429 inhibits GBM cell growth and invasion by targeting SOX2, suggesting its tumor-suppressive role.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Glioblastoma multiforme (GBM) is an aggressive brain tumor with poor prognosis.
- The role of microRNA-429 (miR-429) in GBM development and progression is not well understood.
- MicroRNAs are small non-coding RNAs that regulate gene expression and are implicated in various cancers.
Purpose of the Study:
- To investigate the function of miR-429 in glioblastoma multiforme (GBM).
- To explore the molecular mechanisms underlying miR-429's role in GBM.
- To determine if miR-429 acts as a tumor suppressor in GBM.
Main Methods:
- Quantitative real-time polymerase chain reaction (qRT-PCR) to measure miR-429 expression in GBM tissues and cell lines.
- In vitro assays to assess the effects of miR-429 overexpression on GBM cell proliferation, apoptosis, and invasion.
- Western blot analysis to detect target gene expression and Pearson correlation analysis to assess relationships in patient tissues.
Main Results:
- miR-429 expression was significantly downregulated in GBM tissues and cell lines compared to non-cancerous controls.
- Overexpression of miR-429 inhibited GBM cell proliferation, induced apoptosis, and suppressed invasion.
- miR-429 directly targeted SOX2, leading to its downregulation, and its expression inversely correlated with SOX2 levels in GBM tissues.
Conclusions:
- miR-429 functions as a tumor suppressor in glioblastoma multiforme.
- miR-429 plays a critical role in regulating GBM progression, potentially by targeting SOX2.
- miR-429 may serve as a potential therapeutic target for GBM treatment.
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