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Scientists Edit Brain Connections, Boost Memory
10 May
Summary
- A new tool called SynTrogo selectively reduces synaptic connections.
- Reduced synapses paradoxically strengthened remaining connections.
- Mice showed enhanced memory and adaptive circuit remodeling.
Researchers in South Korea have engineered a groundbreaking system called SynTrogo, which allows for the precise editing of physical brain connections. This innovative method utilizes astrocytes, the brain's support cells, to selectively reduce synaptic connections within specific neural circuits. By targeting the hippocampal CA3-CA1 pathway in mice, the system decreased excitatory synapse numbers by approximately 27 percent.
Contrary to expectations, this reduction in synaptic density paradoxically strengthened the remaining connections. Imaging and electrophysiological studies revealed that these remodeled synapses exhibited increased size and efficiency, with enhanced long-term potentiation, a process crucial for learning and memory. The mice demonstrated significantly improved performance in memory recall tests.
This development offers a new perspective on how neural circuits maintain function. It suggests that selective subtraction of certain connections can paradoxically enhance overall circuit performance through adaptive remodeling. SynTrogo provides a unique platform for studying brain organization and may offer future therapeutic avenues for disorders linked to abnormal synapse numbers or disrupted circuit architecture.
