Bone Compression Triggers Brain Repair Molecules — SkimNews
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- Xiaochun Bai at Southern Medical University in Guangzhou and colleagues found that compressing mice's shin bones for 2.5 minutes daily over five days, using about 15 times body weight of force, restored motor and cognitive function one and eight weeks after a moderate traumatic brain injury.
- Osteocytes containing Piezo1 ion channels are the mechanism: when the team knocked out Piezo1 in mice, bone compression had no effect on motor or memory function.
- Treated mice descended a pole as quickly as uninjured mice and crossed a hidden platform in a water maze nearly five times as often as untreated TBI mice one week post-injury, and about 1.5 times as often at eight weeks.
- Serum from compressed-bone mice showed elevated levels of three molecules — BDNF, PF4, and dopamine — and injecting that serum into untreated TBI mice transferred the brain benefits without any bone compression.
- Male adolescent pigs with moderate TBIs whose shin bones were compressed at twice their body weight showed reduced neuron and tissue loss, less inflammation, and better cognitive performance than untreated pigs.
- More than 1 million people in England and Wales attend emergency departments each year with recent head injuries, of which roughly 40,000 are traumatic brain injuries — and no approved drug currently restores lost brain function after TBI.
- Medha Pathak at UC Irvine flagged that the study used only male animals, and because oestrogen regulates how bone responds to mechanical load, the effect must be tested in females before any clinical translation.
Why it matters: With roughly 40,000 traumatic brain injuries per year in England and Wales alone and no approved drug to restore lost brain function, a mechanical intervention that works through a newly identified bone-to-brain signaling axis could fill a major treatment gap — but only if the effect, so far demonstrated only in male mice and pigs, holds up in females and eventually in people.
Ask SkimNews
