Claim: Alzheimer's and MS are associated with deficiencies in the epidermal growth factor receptor family; one member of said family, which bonds to betacellulin, is called ERBB4.
Evidence: Insufficient ErbB signaling in humans is associated with the development of neurodegenerative diseases, such as multiple sclerosis and Alzheimer's Disease, while excessive ErbB signaling is associated with the development of a wide variety of types of solid tumor. Ligand betacellulin Receptor ErbB-4 +