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Published on: July 8, 2020
MiR-769 promoted cell proliferation in human melanoma by suppressing GSK3B expression
Hai-Jiang Qiu1, Xiao-He Lu2, Sha-Sha Yang3
1Department of Ophthalmology, Zhujiang Hospital, Southern Medical University, Guangzhou 510515, People's Republic of China, People's Republic of China; Department of ophthalmology, Guangzhou First People's Hospital, Guangzhou Medical University, Guangzhou 510180, People's Republic of China, People's Republic of China.
Abstract:
MicroRNAs (miRNAs) are short, non-coding RNAs with post-transcriptional regulatory function, playing crucial roles in cancer development and progression of human melanoma. Previous studies have indicated that miR-769 was implicated in diverse biological processes. However, the underlying mechanism of miR-769 in human melanoma has not been intensively investigated. In this present study, we aimed to investigate the role of miR-769 and its target genes in human melanoma. We found that miR-769 expression was strongly increased in human melanoma cells and clinical tissues compared with their corresponding controls. Overexpression of miR-769 promoted cell proliferation in human melanoma cell line A375, whereas miR-769-in reverses the function. Glycogen synthase kinase-3 Beta (GSK3B), a potential target gene of miR-769, and was validated by luciferase assay. Further studies revealed that miR-769 regulated cell proliferation of human melanoma by directly suppressing GSK3B expression and the knockdown of GSK3B expression reversed the effect of miR-769-in on human melanoma cell proliferation. In summary, our data demonstrated that miR-769 might act as a tumor promoter by targeting GSK3B during development of human melanoma.
Insights
MicroRNA-769 (miR-769) promotes human melanoma cell proliferation by targeting Glycogen synthase kinase-3 Beta (GSK3B). This finding reveals miR-769 as a potential oncoprotein in melanoma development.
Area of Science:
- Molecular Biology
- Oncology
- Genetics
Background:
- MicroRNAs (miRNAs) are key regulators of gene expression involved in cancer.
- The specific role of miR-769 in human melanoma progression remains largely unexplored.
- Previous research suggests miR-769 participates in various biological processes.
Purpose of the Study:
- To elucidate the function and mechanism of miR-769 in human melanoma.
- To identify and validate target genes of miR-769 in melanoma.
- To investigate the therapeutic potential of targeting miR-769.
Main Methods:
- Quantitative real-time PCR to assess miR-769 expression in melanoma tissues and cell lines.
- Cell proliferation assays (e.g., A375 cell line) to evaluate the functional impact of miR-769.
- Luciferase reporter assays to validate GSK3B as a direct target of miR-769.
- Gene knockdown experiments to confirm the regulatory pathway.
Main Results:
- miR-769 expression is significantly upregulated in human melanoma cells and tissues.
- Overexpression of miR-769 enhances proliferation of human melanoma cells.
- Glycogen synthase kinase-3 Beta (GSK3B) was confirmed as a direct target gene of miR-769.
- Suppression of GSK3B by miR-769 mediates its pro-proliferative effect in melanoma.
Conclusions:
- miR-769 acts as an oncogenic microRNA in human melanoma.
- The miR-769/GSK3B axis plays a critical role in promoting melanoma cell proliferation.
- Targeting miR-769 may represent a novel therapeutic strategy for human melanoma.
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