Unraveling the triad of hypoxia, cancer cell stemness, and drug resistance Journal of Hematology & Oncology Springer Nature Link Role of HIF 1 in the Responses of Tumors to Radiotherapy and Chemotherapy 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 Frontiers Hepatocyte growth factor mimetic protects lateral line hair cells from aminoglycoside exposure Dihexa Wikipedia Dihexa Peptide: Complete Guide to Synaptogenesis (2026)