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High Throughput Characterization of Adult Stem Cells Engineered for Delivery of Therapeutic Factors for Neuroprotective Strategies
Published on: January 4, 2015
Molecular Encoding of Ischemic Stroke and its Resolution after Human Neural Stem Cell Therapy by Extracellular
Chuheng Chang1,2,3, Yiqing Wang1,4, Xiaohang Liang5
1Department of Neurosurgery Peking Union Medical College Hospital Chinese Academy of Medical Sciences & Peking Union Medical College Beijing China.
Stroke alters extracellular vesicle (EV) RNA in the brain and blood. Human neural stem cell (hNSC) transplantation improved stroke recovery and modulated EV RNA profiles, suggesting plasma EVs as stroke biomarkers.
Area of Science:
- Neuroscience
- Biomaterials Science
- Regenerative Medicine
Background:
- Extracellular vesicles (EVs) can cross the blood-brain barrier, offering potential as peripheral biomarkers for stroke.
- Stroke induces changes in EV RNA cargo, which may reflect neuropathology.
Purpose of the Study:
- To investigate alterations in EV RNA cargo in rat brain and plasma after stroke and human neural stem cell (hNSC) transplantation.
- To assess the therapeutic effects of hNSC transplantation on stroke recovery and EV profiles.
Main Methods:
- Induction of stroke via middle cerebral artery occlusion in rats.
- Isolation and RNA cargo analysis of EVs from brain and plasma.
- Digital source tracking to determine EV origin.
- Quantification of therapeutic effects of hNSC transplantation.
Main Results:
- Stroke altered EV secretion patterns, increasing non-neuronal cell-derived EVs.
- hNSC transplantation led to minimal immune rejection and cell survival.
- Stem cell-derived EVs were detected in peripheral blood.
- EV RNAs in brain and plasma showed increased correlation post-stroke, which hNSC transplantation reversed.
- hNSC transplantation improved functional recovery, reduced lesion size, and promoted neurogenesis and blood-brain barrier integrity.
Conclusions:
- Plasma-derived EV RNAs reflect stroke pathophysiology.
- hNSC transplantation promotes neural regeneration through specific EV miRNA pathways, such as miR-204-5p/EFNB3.
- EVs hold promise as biomarkers for stroke and therapeutic delivery vehicles.
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