Why is the blood-brain barrier considered a significant obstacle in stem cell therapy for autism?
Answer
There is no consensus on whether injected cells can effectively migrate to the brain to perform functions
A major scientific hurdle in utilizing stem cells to treat neurological conditions is the physical barrier of the brain itself. The blood-brain barrier serves to protect the brain from foreign substances and pathogens. For stem cell therapy to be effective, the injected cells would theoretically need to pass through this barrier and migrate to the targeted areas of the brain to influence connectivity or encourage repair. Currently, there is no scientific consensus proving that injected cells can consistently achieve this, rendering the therapeutic mechanism unproven in living humans.
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