Nervous System Uses Piezo1 to Tune Myelin Length to Axon Diameter
New study identifies the mechanosensitive ion channel Piezo1 as a key sensor in oligodendrocytes that determines myelin sheath length based on nerve fiber thickness.
Researchers at Upstate Medical University have uncovered how the nervous system regulates the length of myelin sheaths, the insulating layers around nerve fibers that enable rapid signal transmission. Published in PLOS Biology, the study shows that oligodendrocytes use the mechanosensitive protein Piezo1 to detect axon diameter and adjust myelin segment length accordingly. Senior author Marie Bechler, Ph.D., noted that this mechanism is especially active during early myelin formation. Thicker axons typically receive longer myelin segments, and Piezo1 appears essential for this scaling. The work helps explain how myelin patterns are established across the central nervous system and offers a foundation for understanding myelin-related disorders like multiple sclerosis, where myelin loss disrupts neural communication and neuronal health. First author Amanda R. Young led the experiments, supported by the university’s Electron Microscopy core.
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