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Updated: Mar 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
From Limited Samples to Mechanistic Insights: Exploratory Identification and Functional Validation of a
Zhimin Chen1, Xiaotong Kong1, Ping He2
1Department of Neurology, The Second Affiliated Hospital, Harbin Medical University, Harbin, 150086, China.
Insights
This study reveals that specific circular RNAs (circRNAs) regulate Myasthenia Gravis (MG) by sponging miR-338-3p, affecting NRP1 expression and cell proliferation. These findings offer potential therapeutic targets for MG.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Circular RNAs (circRNAs) are increasingly recognized for their role in autoimmune diseases like Myasthenia Gravis (MG).
- The precise regulatory mechanisms involving circRNAs, microRNAs (miRNAs), and messenger RNAs (mRNAs) in MG pathogenesis are not well understood.
Purpose of the Study:
- To investigate the circRNA-miRNA-mRNA regulatory network involved in Myasthenia Gravis progression.
- To identify key circRNAs and their downstream targets influencing MG pathogenesis.
Main Methods:
- Microarray analysis was used to identify differentially expressed circRNAs (DECs) in MG patients versus healthy controls.
- Bioinformatic tools (CircInteractome, miRWalk, miRTarbase, TargetScan) predicted miRNA and mRNA targets.
- A ceRNA network was constructed using Cytoscape, and key interactions were validated using dual-luciferase reporter assays, qRT-PCR, Western blotting, CCK-8, and ELISA.
Main Results:
- A regulatory network comprising 4 circRNAs, 2 miRNAs, and 11 target genes was established for MG.
- hsa_circ_0062400 and hsa_circ_0002397 were found to sponge miR-338-3p, negatively regulating NRP1 expression.
- Silencing these circRNAs suppressed Jurkat cell proliferation, an effect reversed by miR-338-3p inhibition; NRP1 influenced cytokine levels.
Conclusions:
- hsa_circ_0062400 and hsa_circ_0002397 play a role in MG pathogenesis by regulating NRP1 via sponging miR-338-3p.
- This study provides insights into MG pathogenesis and identifies potential therapeutic targets.
- Limitations include a small sample size, gender imbalance, and restricted validation to cell lines.
Introduction:
CircRNAs are implicated in various autoimmune diseases, such as Myasthenia Gravis (MG), yet their regulatory mechanisms remain poorly understood. This research investigated the regulatory network of circRNAs, miRNAs, and mRNAs in modulating MG progression.
Materials And Methods:
Three MG patients (male: female = 1:2) and three healthy controls were enrolled for microarray analysis. The “Limma” package was employed to identify the differentially expressed circRNAs (DECs). Target miRNAs of DECs were predicted via the CircInteractome database, while target genes of miRNAs were predicted utilizing miRWalk, miRTarbase, and TargetScan databases. Cytoscape software was applied to establish the circRNAs-miRNAs-mRNAs network. Thereafter, a dual-luciferase reporter assay was conducted to validate the targeted regulatory relationship between hsa_circ_0062400, hsa_circ_0002397, and miR-338-3p. The expression of NRP1 was measured by qRT-PCR and Western blotting, and the cell viability of Jurkat cells was evaluated via CCK-8 assay. The levels of cytokines (IL-2, IL-6, IFN-γ, TNF-α) after NRP1 knockout were detected by ELISA.
Results:
4 circRNAs, 2 miRNAs, and 11 target genes associated with MG pathogenesis were identified to construct a ceRNA regulatory network. In-vitro assays validated the targeted interactions between hsa_circ_0062400, hsa_circ_0002397, and miR-338-3p. miR-338-3p negatively regulated both protein and mRNA levels of NRP1. Further, silencing hsa_circ_0062400 or hsa_circ_ 0002397 markedly suppressed NRP1 expression and Jurkat cell proliferation, which was reversed by miR-338-3p inhibitor. Moreover, NRP1 affected the levels of cytokines in Jurkat cells.
Discussion:
The circRNAs were demonstrated to be closely associated with MG etiology, which was also supported by our current discovery that hsa_circ_0062400 and hsa_circ_0002397 regulated the level of NRP1 by sponging miR-338-3p in MG. However, the roles of hsa_circ_0062400 and hsa_circ_0002397 in MG have been rarely reported, which requires further validation. Limitations of this study included a small, gender-imbalanced sample size for microarray analysis and incomplete verification of the ceRNA network. In addition, functional experiments were limited to Jurkat cells, and more in-vivo validation assays were lacking.
Conclusion:
Collectively, the present study revealed MG pathogenesis and also provided potential treatment targets for the disease.
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