Brain Healthp38α Inhibition Reverses Early Axonal Transport Deficits Driven by Tau Buildup
Researchers at UCL discovered that abnormal tau protein accumulation — caused by mutations in the MAPT gene — disrupts the transport of essential cargo along neurons very early in disease, before tangles or cell death occur. Using advanced two-photon imaging in living mouse brains, they tracked how BDNF-carrying granules move through neurons in real time. They found that tau forms enlarged 'envelopes' around microtubules, physically blocking transport like a roadblock. Critically, blocking a protein called p38α — a stress-activated enzyme — restored normal transport. This suggests axonal transport failure in Alzheimer's and frontotemporal dementia is reversible, and p38α inhibition may be a viable early therapeutic target to halt neurodegeneration before irreversible damage sets in.
