An anonymous reader writes: A protein injection protected neurons in the brains of mice with prion disease, according to new research that could offer hope to patients with neurodegenerative diseases like Alzheimer’s and Parkinson’s. In what was described as a “major breakthrough in understanding what kills neurons,” the latest study, published in the journal Nature, has for the first time found a pathway leading to neuron death in mice with prion disease, the mouse equivalent of Creutzfeldt-Jakob Disease (CJD), which is currently an incurable, neurodegenerative and fatal condition that causes the brain to slowly die.