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Updated: Jul 11, 2025
Evaluation of Bioenergetic Function in Cerebral Vascular Endothelial Cells
Published on: November 19, 2016
Role of microRNA-34a in blood-brain barrier permeability and mitochondrial function in ischemic stroke
Cole T Payne1, Sidra Tabassum1, Silin Wu1
1Division of Neurocritical Care, Department of Neurosurgery, McGovern School of Medicine, University of Texas Health Science Center, Houston, TX, United States.
Abstract:
Over the past decade, there has been an uptick in the number of studies conducting research on the role of microRNA (miRNA) molecules in stroke. Among these molecules, miR-34a has emerged as a significant player, as its levels have been observed to exhibit a substantial rise following ischemic events. Elevated levels of miR-34a have been found to have multiple effects, including the modulation of inflammatory molecules involved in the post-stroke recovery process, as well as negative effects on the blood-brain barrier (BBB) permeability. Interestingly, the increase of miR-34a appears to increase BBB permeability post stroke, through the negative effect on mitochondrial function. The strength of mitochondrial function is crucial for limiting para-cellular permeability and maintaining the structural integrity of the BBB. Furthermore, the activation of ischemic repair mechanisms and the reduction of ischemic event damage depend on healthy mitochondrial activity. This review aims to emphasize the involvement of miR-34a in ischemic stroke, specifically its interaction with mitochondrial genes in cerebrovascular endothelial cells, the effect on mitochondrial function, and lastly its regulatory role in BBB permeability. A comprehensive understanding of the role of miR-34a in maintaining BBB integrity and its contribution to the pathogenesis of stroke holds significant value in establishing a foundation for the development of future therapeutics and diagnostic markers.
Insights
MicroRNA 34a (miR-34a) levels rise after stroke, negatively impacting mitochondrial function and increasing blood-brain barrier permeability. Understanding miR-34a is key for developing new stroke therapies.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- MicroRNAs (miRNAs) are increasingly studied for their role in stroke pathogenesis.
- miR-34a levels significantly increase following ischemic events.
- miR-34a influences inflammatory responses and blood-brain barrier (BBB) integrity post-stroke.
Purpose of the Study:
- To review the role of miR-34a in ischemic stroke.
- To highlight miR-34a's interaction with mitochondrial genes in cerebrovascular endothelial cells.
- To elucidate miR-34a's effect on mitochondrial function and BBB permeability.
Main Methods:
- Literature review focusing on miR-34a and ischemic stroke.
- Analysis of studies investigating miR-34a's impact on mitochondrial function.
- Examination of research on miR-34a's regulatory role in BBB permeability.
Main Results:
- Elevated miR-34a negatively affects mitochondrial function.
- Increased miR-34a contributes to heightened BBB permeability post-stroke.
- Mitochondrial dysfunction is linked to increased para-cellular permeability and compromised BBB integrity.
Conclusions:
- miR-34a plays a critical role in ischemic stroke pathogenesis.
- Targeting miR-34a may offer therapeutic potential for stroke.
- Understanding miR-34a's mechanisms is vital for developing diagnostic markers and treatments for stroke.
