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Published on: July 14, 2016
MicroRNAs: a novel promising therapeutic target for cerebral ischemia/reperfusion injury?
Xiao-Li Min1, Ting-Yong Wang2, Yi Cao3
1Institute of Neuroscience, Kunming Medical University, Kunming, Yunnan Province, China; Faculty of Clinical Medicine, Yunnan University of Traditional Chinese Medicine; the First Affiliated Hospital of Yunnan University of Traditional Chinese Medicine, Kunming, Yunnan Province, China.
Abstract:
To determine the molecular mechanism of cerebral ischemia/reperfusion injury, we examined the microRNA (miRNA) expression profile in rat cortex after focal cerebral ischemia/reperfusion injury using miRNA microarrays and bioinformatic tools to systematically analyze Gene Ontology (GO) function classifications, as well as the signaling pathways of genes targeted by these differentially expressed miRNAs. Our results show significantly changed miRNA expression profiles in the reperfusion period after focal cerebral ischemia, with a total of 15 miRNAs up-regulated and 44 miRNAs down-regulated. Target genes of these differentially expressed miRNAs were mainly involved in metabolic and cellular processes, which were identified as hub nodes of a miRNA-GO-network. The most correlated pathways included D-glutamine and D-glutamate metabolism, the renin-angiotensin system, peroxisomes, the PPAR signaling pathway, SNARE interactions in vesicular transport, and the calcium signaling pathway. Our study suggests that miRNAs play an important role in the pathological process of cerebral ischemia/reperfusion injury. Understanding miRNA expression and function may shed light on the molecular mechanism of cerebral ischemia/reperfusion injury.
Insights
MicroRNAs (miRNAs) are crucial in cerebral ischemia/reperfusion injury. This study identified specific miRNA expression changes and their targeted pathways, revealing their role in the injury's molecular mechanisms.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Cerebral ischemia/reperfusion injury is a significant cause of neurological damage.
- The molecular mechanisms underlying this injury are not fully understood.
- MicroRNAs (miRNAs) are emerging as key regulators in various biological processes, including injury responses.
Purpose of the Study:
- To investigate the microRNA (miRNA) expression profile in the rat cortex following focal cerebral ischemia/reperfusion injury.
- To elucidate the molecular mechanisms and signaling pathways affected by differentially expressed miRNAs.
- To identify potential therapeutic targets by understanding the role of miRNAs in this injury model.
Main Methods:
- Utilized miRNA microarrays to profile miRNA expression in rat cortex post-ischemia/reperfusion.
- Employed bioinformatic tools for systematic analysis of Gene Ontology (GO) function classifications.
- Analyzed signaling pathways targeted by differentially expressed miRNAs using network analysis.
Main Results:
- Identified significant changes in miRNA expression during the reperfusion period, with 15 miRNAs up-regulated and 44 down-regulated.
- Found that target genes of these miRNAs are primarily involved in metabolic and cellular processes.
- Highlighted key pathways including D-glutamine and D-glutamate metabolism, the renin-angiotensin system, and calcium signaling.
Conclusions:
- MicroRNAs play a significant role in the pathological processes of cerebral ischemia/reperfusion injury.
- The identified miRNA-GO network provides insights into the molecular underpinnings of the injury.
- Further understanding of miRNA expression and function could lead to novel therapeutic strategies for cerebral ischemia/reperfusion injury.
