Stem cell, Granulocyte Colony Stimulating Factor and or Dihexa to promote limb function recovery in a rat sciatic nerve damage repair model: Experimental animal studies ScienceDirect Dihexa Capsules LeadWest Medical Dihexa Peptide Dallas Cognitive Enhancement & Brain Health Small molecule activation of the neurotrophin hepatocyte growth factor to treat Alzheimer disease What if neuroplasticity research targeted the HGF c Met pathway? Dihexa (PNB 0408) is an angiotensin IVderived peptide studied in preclinical models for its role in synaptogenesis and cognitive signaling mechanisms. Human data remains limited.