Frontiers Hepatocyte growth factor mimetic protects lateral line hair cells from aminoglycoside exposure Vascular Dementia Symptoms & Treatments alz.org Vascular dementia Penn Memory Center Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted