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Altered hippocampal microRNA expression profiles in neonatal rats caused by sevoflurane anesthesia: MicroRNA
Jishi Ye1, Zongze Zhang1, Yanlin Wang1
1Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.
Abstract:
Although accumulating evidence has suggested that microRNAs (miRNAs) have a serious impact on cognitive function and are associated with the etiology of several neuropsychiatric disorders, their expression in sevoflurane-induced neurotoxicity in the developing brain has not been characterized. In the present study, the miRNAs expression pattern in neonatal hippocampus samples (24 h after sevoflurane exposure) was investigated and 9 miRNAs were selected, which were associated with brain development and cognition in order to perform a bioinformatic analysis. Previous microfluidic chip assay had detected 29 upregulated and 24 downregulated miRNAs in the neonatal rat hippocampus, of which 7 selected deregulated miRNAs were identified by the quantitative polymerase chain reaction. A total of 85 targets of selected deregulated miRNAs were analyzed using bioinformatics and the main enriched metabolic pathways, mitogen-activated protein kinase and Wnt pathways may have been involved in molecular mechanisms with regard to neuronal cell body, dendrite and synapse. The observations of the present study provided a novel understanding regarding the regulatory mechanism of miRNAs underlying sevoflurane-induced neurotoxicity, therefore benefitting the improvement of the prevention and treatment strategies of volatile anesthetics related neurotoxicity.
Insights
Sevoflurane exposure alters microRNA (miRNA) expression in developing rat brains, impacting pathways crucial for neuronal development and cognitive function. This research sheds light on miRNA roles in sevoflurane neurotoxicity, aiding future treatment strategies.
Area of Science:
- Neuroscience
- Molecular Biology
- Developmental Biology
Background:
- MicroRNAs (miRNAs) are implicated in cognitive function and neuropsychiatric disorders.
- The impact of sevoflurane on developing brain miRNA expression remains largely uncharacterized.
- Understanding these changes is crucial for addressing potential neurotoxicity.
Purpose of the Study:
- To investigate miRNA expression patterns in neonatal rat hippocampus following sevoflurane exposure.
- To identify specific miRNAs and their associated biological pathways involved in sevoflurane-induced neurotoxicity.
- To provide insights into the regulatory mechanisms of miRNAs in the developing brain.
Main Methods:
- Neonatal rat hippocampus samples were analyzed 24 hours after sevoflurane exposure.
- Microfluidic chip assays identified differentially expressed miRNAs.
- Quantitative polymerase chain reaction validated selected miRNA changes.
- Bioinformatic analysis explored targets and enriched metabolic pathways.
Main Results:
- Nine miRNAs associated with brain development and cognition were selected for analysis.
- Seven deregulated miRNAs were identified and validated.
- Bioinformatic analysis revealed 85 targets for these miRNAs.
- The mitogen-activated protein kinase and Wnt pathways were identified as potentially involved.
Conclusions:
- This study reveals novel insights into miRNA regulatory mechanisms underlying sevoflurane neurotoxicity in the developing brain.
- The findings highlight the involvement of specific pathways in neuronal structure and function.
- This research contributes to understanding and potentially improving prevention and treatment strategies for anesthetic-related neurotoxicity.
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