Scientists invent a gel that creates neurons from other cells, which could help treat Alzheimer's

Key Points:

• A new study published in Cell Biomaterials suggests that reducing levels of the protein PTBP1 in astrocytes may convert these brain-supporting cells into neurons, potentially enabling regeneration of neurons lost due to diseases like Alzheimer's.
• Researchers used a novel Nano-Eraser technique to deliver an antibody targeting PTBP1 across the blood-brain barrier, successfully inducing astrocytes in lab dishes and brain organoids to exhibit neuron-like properties and electrical activity.
• In Alzheimer's disease mouse models, treatment with the polymer gel containing the antibody improved memory and behavior, increased neuron density, and reduced inflammation, although direct evidence of astrocyte-to-neuron conversion in live mice remains unconfirmed.
• Experts emphasize that further research is needed to verify the mechanism in living brains, assess long-term effects, and ensure safety before clinical trials in humans, given astrocytes' critical roles and potential risks of chronically reducing PTBP1.
• The research team plans additional studies in live mice and nonhuman primates to explore the treatment's efficacy and safety, marking a promising but early step toward therapies that could restore brain function in neurodegenerative diseases.