Overview
- A Nature paper published Wednesday reports that astrocytes are not uniform and that a CD51-positive (CD51+) subtype performs distinct roles in mouse brains.
- The team created new CD51-FLP transgenic mice and tools that let them label and manipulate CD51+ and CD51− astrocytes separately in living cortex and hippocampus.
- In the developing and injured cerebral cortex, CD51+ astrocytes drive synapse formation by secreting glypican 6, a function absent in CD51− astrocytes.
- In the hippocampus the CD51 protein itself promotes structural circuit rewiring and plasticity needed for memory, showing a direct molecular role in learning-related changes.
- The authors propose targeting CD51+ astrocytes for therapies to aid development, memory and stroke recovery, but the work is preclinical and human relevance remains to be tested.