PDE4 Inhibitors
PDE4 inhibitors are designed to inhibit the activity of PDE4, an enzyme which breaks down neuronal cAMP. PDE4 inhibitors may have therapeutic utility in multiple indications, including, Alzheimer's disease, schizophrenia, respiratory disease and drug abuse. In June 2007, we reacquired all development and commercialization rights to the PDE4 inhibitor program.