Damage to brain cells in two separate neurodegenerative diseases — Alzheimer's disease and progressive supranuclear palsy — is not limited to specific parts of the brain and these diseases share a pattern of gene alterations within the brain, according to researchers at Mayo Clinic, the University of Florida and other collaborating organizations. The researchers say this finding suggests the neurodegenerative diseases may have the same underlying disease links. The finding, which is published in The Journal…