2 Drugs Have Positive Effect on Alzheimer’s Disease: Study
University of Colorado researchers say two FDA-approved drugs — imipramine and olanzapine — block apolipoprotein E4 (apoE4)-catalyzed polymerization of amyloid-beta, making them potentially useful in preventing Alzheimer’s disease. Writing in the open-access journal Alzheimer’s Research and Therapy, the researchers say the two drugs also show evidence of improving Alzheimer’s disease cognition.
Imipramine (Tofranil) is described as a tricyclic antidepressant that blocks norepinephrine and serotonin reuptake. Olanzapine (Zyprexa) is an antipsychotic drug that has been evaluated for acute treatment of behavioral and psychological symptoms of Alzheimer’s Disease, the researchers say.
“The critical test of any proposed Alzheimer’s disease mechanism is whether it leads to effective treatments,” the researchers conclude. “Our high-throughput screen identified two promising FDA-approved drugs, imipramine and olanzapine, which have no structural, functional, or clinical similarities other than their shared ability to inhibit apoE4-catalyzed amyloid beta polymerization, thus identifying this mechanism as an essential contribution of apoE4 to Alzheimer’s disease