Frontiers The Use of Peptides in the Treatment of Fragile X Syndrome: Challenges and Opportunities Neuroinflammation and Oxidative Stress in the Pathogenesis of Autism Spectrum Disorder 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 Dihexa Peptide Therapy Memory & Cognition Beverly Hills Dihexa Peptide Therapy Boynton Beach Allura Aesthetics + Wellness Peptides and Exorphins in the Autism Spectrum