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Formulating and Characterizing an Exosome-based Dopamine Carrier System
Published on: April 4, 2022
Exosome-Based Delivery of miR-124 in a Huntington's Disease Model
Soon-Tae Lee1,2, Wooseok Im1,3, Jae-Jun Ban1
1Department of Neurology, Neuroscience Research Center, Seoul National University Hospital, Seoul, Korea.
Objective:
Huntington's disease (HD) is a genetic neurodegenerative disease that is caused by abnormal CAG expansion. Altered microRNA (miRNA) expression also causes abnormal gene regulation in this neurodegenerative disease. The delivery of abnormally downregulated miRNAs might restore normal gene regulation and have a therapeutic effect.
Methods:
We developed an exosome-based delivery method to treat this neurodegenerative disease. miR-124, one of the key miRNAs that is repressed in HD, was stably overexpressed in a stable cell line. Exosomes were then harvested from these cells using an optimized protocol. The exosomes (Exo-124) exhibited a high level of miR-124 expression and were taken up by recipient cells.
Results:
When Exo-124 was injected into the striatum of R6/2 transgenic HD mice, expression of the target gene, RE1-Silencing Transcription Factor, was reduced. However, Exo-124 treatment did not produce significant behavioral improvement.
Conclusion:
This study serves as a proof of concept for exosome-based delivery of miRNA in neurodegenerative diseases.
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