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Intra-Arterial Delivery of Neural Stem Cells to the Rat and Mouse Brain: Application to Cerebral Ischemia
Published on: June 26, 2020
Delayed injection of neural progenitor cells improved spatial learning dysfunction after cerebral ischemia
Nobuyuki Mochizuki1, Norio Takagi, Chika Onozato
1Department of Molecular and Cellular Pharmacology, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan.
Biochemical and Biophysical Research Communications
|January 29, 2008
Summary
Delayed injection of neural progenitor cells (NPCs) into the hippocampus improved neurological function and prevented learning deficits after cerebral ischemia in rats. These NPCs acted as a source of neurotrophic factors, promoting recovery.
Area of Science:
- Neuroscience
- Regenerative Medicine
- Cell Therapy
Background:
- Cerebral ischemia often leads to neurological deficits and learning dysfunction.
- The therapeutic potential of stem cells for neurological recovery is recognized, but the specific effects of neural progenitor cells (NPCs) on learning impairments post-ischemia require further investigation.
Purpose of the Study:
- To determine if delayed transplantation of exogenous neural progenitor cells (NPCs) can mitigate learning dysfunction induced by cerebral ischemia.
- To evaluate the impact of NPC transplantation on neurological severity and cognitive performance in a rat model of cerebral ischemia.
Main Methods:
- Cerebral ischemia was induced in rats using intracerebral microsphere injection.
- Neural progenitor cells (NPCs) were harvested from green fluorescent protein transgenic rats and injected into the hippocampus on Day 7 post-ischemia.
- Neurological function was assessed using the modified neurological severity score, and learning ability was evaluated via the water maze task.
Main Results:
- Delayed NPC injection significantly improved the modified neurological severity score in rats subjected to cerebral ischemia.
- Transplanted NPCs reduced the prolonged escape latency observed in the water maze task, indicating prevention of learning dysfunction.
- A subset of injected NPCs expressed mature neuronal markers, and they were found to express Brain-Derived Neurotrophic Factor (BDNF) by Day 28 post-transplantation.
Conclusions:
- Exogenous neural progenitor cells (NPCs) delivered via delayed hippocampal injection can effectively prevent cerebral ischemia-induced learning dysfunction.
- Injected NPCs may exert therapeutic effects by acting as a source of neurotrophic factors, such as BDNF, and potentially differentiating into neuronal cells.
- This study highlights the potential of NPC transplantation as a viable therapeutic strategy for neurological and cognitive recovery following ischemic stroke.
