Peptide inhibitors targeting FOXO4 p53 interactions and inducing senescent cancer cell specific apoptosis bioRxiv FOXO4 DRI improves spermatogenesis in aged mice through reducing senescence associated secretory phenotype secretion from Leydig cells ScienceDirect FOXO4 DRI induces keloid senescent fibroblast apoptosis by promoting nuclear exclusion of upregulated p53 serine 15 phosphorylation Communications Biology foxo4 dri peptide dosing Comparison Guide Suggested dosage: Inject 100 400mcg kg intravenously every other day FOXO4 DRI alleviates age related testosterone secretion insufficiency by targeting senescent Leydig cells in aged mice Aging