Dihexa Research Peptide Protocols: Reconstitution & Storage Frontiers HGF and MET: From Brain Development to Neurological Disorders 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 Targeting HGF c MET signaling to regulate the tumor microenvironment: Implications for counteracting tumor immune evasion Cell Communication and Signaling Springer Nature Link