How This Works
FOXO4-DRI is a synthetic peptide that selectively targets senescent cells by blocking the FOXO4–p53 protein interaction[1][2]. In normal cells, FOXO4 binds to p53 and sequesters it in the nucleus. In senescent cells, disrupting this interaction causes p53 to translocate to the mitochondria, triggering apoptotic cell death specifically in aged, dysfunctional cells while sparing healthy ones[1]. Animal studies have demonstrated that FOXO4-DRI can reduce senescent cell burden, improve tissue function, and mitigate age-related pathologies[3][4][5]. The peptide’s D-retro-inverso configuration enhances its stability and resistance to proteolytic degradation[2].
References
Nature Communications Biology
— FOXO4-DRI induces keloid senescent fibroblast apoptosis by promoting nuclear exclusion of upregulated p53-serine 15 phosphorylation
Nature Cell
— Targeted apoptosis of senescent cells restores tissue homeostasis in response to chemotoxicity and aging (original FOXO4-DRI discovery)
View Source
Aging (Albany NY)
— FOXO4-DRI alleviates age-related testosterone secretion insufficiency by targeting senescent Leydig cells in aged mice
Journal of Cellular and Molecular Medicine
— FOXO4 peptide targets myofibroblast ameliorates bleomycin-induced pulmonary fibrosis in mice
Cell
— Clearance of senescent cells by ABT263 rejuvenates aged hematopoietic stem cells in mice (senolytic mechanism context)
Aging (Albany NY) — Methods & Protocols
— FOXO4-DRI safety note: no human clinical measurement data exist yet
PubMed
— A liquid chromatography high-resolution mass spectrometry in vitro assay to assess metabolism at the preparation area of prepared research peptides
Bachem
— Care and Handling of Peptides (storage, reconstitution, stability guidance)
MedlinePlus
— (SQ) measurements: technique, site selection, and safety
American Diabetes Association
— Insulin preparation area rotation and lipohypertrophy prevention
CDC
— Vaccine preparation: route (angle, site; no aspiration)
CDC ( Measurement PDF)
— Technique diagram and site guidance for measurements
NCBI Bookshelf
— Best practices for measurement (asepsis, preparation, and preparation)
PMC
— Drug Measurement Review: pharmacologic considerations of the route