A New Reason To Frown
Oops. In a reversal of the usual sequence in science, researchers have discovered, after millions of people have received the drug, something fundamental about how Botox can act. Contrary to what turned up in preclinical testing, botulinum toxin can travel along neurons from the injection site into the brain, at least in lab animals. Researchers at Italy’s Institute of Neuroscience injected rats and mice with botulinum neurotoxin A in doses comparable to those used in people....