Extracellular Ubiquitin Enhances Autophagy and Inhibits Mitochondrial Apoptosis Pathway to Protect Neurons Against Spinal Cord Ischemic Injury via CXCR4.

Summary: Spinal cord injuries are devastating because they cut off blood and oxygen to nerves, causing cells to self-destruct. Scientists have discovered that a naturally occurring protein called "extracellular ubiquitin" (eUb) might act as a shield for these nerves. In experiments using both lab-grown cells and rats, administering eUb early after an injury helped trigger a cellular "cleanup" process while stopping the signals that tell cells to die. This protective effect works by attaching to a specific receptor on the nerve cells. These findings suggest that eUb could be a promising new treatment to prevent permanent damage after spinal cord trauma.