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Updated: May 23, 2026
Differentiation of a Human Neural Stem Cell Line on Three Dimensional Cultures, Analysis of MicroRNA and Putative Target Genes
Published on: April 12, 2015
MiR-206 regulates neural cells proliferation and apoptosis via Otx2
1Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, China.
Abstract:
MiR-206 was involved in a series of cellular activities, such as the growth and development of skeletal muscle and the tumorigenesis. MiR-206 was characterized previously as a differentially expressed gene in sodium arsenite (SA)-induced neural tube defects (NTDs) in chick embryos via miRNA microarray analysis. However, the role of miR-206 in the pathological process of nerve cells remained elusive. In this study we found differential expression of miR-206 in SA-treated chick embryos by Northern blot analysis. Ectopic expression of miR-206 inhibited cell proliferation, and promoted cell apoptosis in U343 and SK-N-SH cell by using MTT, Edu Apollo assay and Flow cytometry analysis. Further investigation revealed that miR-206 can interact with 3'-untranslated region (UTR) of Otx2. MiR-206 mimics down-regulated the endogeneous Otx2 expression, whereas the miR-206 inhibitor obviously up-regulated the expression of Otx2. These findings indicate that overexpression of miR-206 promotes cell apoptosis and low expression of miR-206 inhibits cell apoptosis. Otx2 may play an important role in the process of miR-206-mediated cell apoptosis.
Insights
MicroRNA-206 (miR-206) plays a crucial role in nerve cell apoptosis. Overexpression of miR-206 promotes apoptosis, while its inhibition reduces it, impacting neural tube defect development.
Area of Science:
- Neuroscience
- Molecular Biology
- Developmental Biology
Background:
- MicroRNA-206 (miR-206) is implicated in skeletal muscle development and tumorigenesis.
- Previous studies identified miR-206 as differentially expressed in sodium arsenite-induced neural tube defects (NTDs) in chick embryos.
- The specific function of miR-206 in the pathological processes of nerve cells remains largely unknown.
Purpose of the Study:
- To investigate the role of miR-206 in nerve cell apoptosis.
- To explore the relationship between miR-206 and Otx2 expression in the context of apoptosis.
- To elucidate the mechanism of miR-206 in sodium arsenite-induced neural tube defects.
Main Methods:
- Northern blot analysis to detect miR-206 expression in sodium arsenite-treated chick embryos.
- Cell proliferation assays (MTT, Edu Apollo) and flow cytometry to assess apoptosis in U343 and SK-N-SH cells.
- MiR-206 mimics and inhibitors were used to study the interaction with Otx2 3'-untranslated region (UTR).
Main Results:
- Differential expression of miR-206 was confirmed in sodium arsenite-treated chick embryos.
- Ectopic expression of miR-206 inhibited cell proliferation and promoted apoptosis in neuronal cell lines.
- miR-206 directly interacts with the 3'-UTR of Otx2, down-regulating its expression; conversely, miR-206 inhibition up-regulated Otx2.
Conclusions:
- Overexpression of miR-206 promotes nerve cell apoptosis, while its downregulation inhibits apoptosis.
- Otx2 is a key target of miR-206 and plays a significant role in miR-206-mediated apoptosis.
- These findings provide insights into the mechanism underlying miR-206's role in neural development and disease.
