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Published on: June 10, 2013
Alterations in microRNA expression profile in rabies virus-infected mouse neurons
Abstract:
Rabies virus (RABV) is known to cause a fatal infection in many mammalian species, yet its pathogenesis remains poorly understood. This study was performed to analyze the microRNA (miRNA) expression profiles in RABV-infected primary neurons of mice. A total of 53 miRNAs were found to be differentially expressed in RABV-infected samples compared with mock samples in a time-dependent manner. Among them, the expression of ten miRNAs was validated by real-time RT-PCR. Potential target genes of differentially expressed miRNAs were predicted by TargetScan. Further bioinformatics analysis indicated that these predicted targets were overrepresented in neuronal function-related Gene Ontology (GO) terms and biological pathways. The results of this study suggest that RABV may cause neuronal dysfunction by regulating cellular miRNA expression.
Insights
Rabies virus infection alters microRNA (miRNA) expression in mouse neurons, potentially causing neuronal dysfunction. This study reveals key miRNA changes during rabies virus pathogenesis.
Area of Science:
- Neuroscience
- Virology
- Molecular Biology
Background:
- Rabies virus (RABV) causes fatal neurological disease in mammals.
- The precise mechanisms of RABV pathogenesis, particularly at the molecular level in neurons, are not fully understood.
Purpose of the Study:
- To investigate the changes in microRNA (miRNA) expression profiles in primary mouse neurons following RABV infection.
- To identify specific miRNAs and their potential target genes involved in RABV-induced neuronal alterations.
Main Methods:
- Primary mouse neurons were infected with RABV, and miRNA expression was analyzed over time.
- Differential miRNA expression was identified using high-throughput sequencing.
- Real-time RT-PCR was employed to validate the expression of selected miRNAs.
- Bioinformatics tools (TargetScan) were used to predict target genes of differentially expressed miRNAs.
Main Results:
- A total of 53 miRNAs showed differential expression in RABV-infected neurons compared to controls, in a time-dependent manner.
- The expression levels of ten specific miRNAs were confirmed via real-time RT-PCR.
- Predicted target genes of these miRNAs were significantly enriched in Gene Ontology (GO) terms related to neuronal functions and biological pathways.
Conclusions:
- Rabies virus infection significantly alters the miRNA expression landscape in neurons.
- The dysregulation of cellular miRNAs by RABV may play a crucial role in the development of neuronal dysfunction during rabies infection.
- These findings provide novel insights into the molecular pathogenesis of rabies virus.
