FOXO4-DRI
Research OnlyA D-retro-inverso peptide designed to disrupt the FOXO4-p53 interaction, selectively eliminating senescent cells (senolytic). Preclinical studies in aged mice demonstrated restored fitness, fur density, and renal function. No human clinical trials conducted. More selective than BCL-2 inhibitors but remains unproven in humans.
FOXO4-D-Retro-Inverso · FOXO4-DRI Peptide · Proxofim
Preclinical evidence only
- Preclinical
- 78%
- Clinical
- 0%
Based on 18 cited sources
Demonstrated effect magnitude — not a recommendation or safety claim.
Research Depth low: animal + in-vitro only, zero human studies, modest single-group preclinical program (1E). Mechanism strong: FOXO4 target with functional p53-disruption confirmed in vivo (Baar 2017). Plausibility good: senolysis -> healthspan is coherent and class-supported by genetic clearance (Baker 2011), though the human outcome link is unproven. Global Coverage low: one originating collaboration, no independent replication, no governance review. Community Experience minimal: niche discussion, no documented anecdotal effect reports. Effectiveness not-established: no human efficacy data and no meaningful community effect signal.
FOXO4-DRI is a D-retro-inverso peptide designed to selectively eliminate senescent cells by disrupting the FOXO4-p53 interaction that allows these “zombie cells” to evade apoptosis.
How It Works (Simplified)
FOXO4-DRI triggers selective death of senescent cells through a targeted mechanism:
Competes with endogenous FOXO4 for p53 binding, breaking the survival mechanism that keeps senescent cells alive.
Freed from nuclear sequestration, p53 translocates to mitochondria and initiates the intrinsic apoptosis pathway.
Only senescent cells depend on FOXO4-p53 for survival - normal cells are unaffected by the disruption.
D-amino acids in reversed sequence resist protease degradation while maintaining the same binding surface.
Key Research: Baar MP et al. (2017) demonstrated selective senolysis in aged mice with restoration of fitness, fur density, and renal function. PMID:28340339
Important Limitations
- No human trials — All efficacy data is from mouse studies
- No independent replication — Findings primarily from originating laboratory
- Safety profile unknown — Long-term effects of senescent cell depletion unclear
- Complex synthesis — D-retro-inverso peptides are difficult to manufacture
- Product quality concerns — Research-grade only, variable purity
FOXO4-DRI enters cells via cell-penetrating properties. Competes with endogenous FOXO4 for p53 binding. Apoptosis of senescent cells begins within hours in vitro.
PMID:28340339In mouse studies, treatment three times per week for 3-4 weeks produced measurable effects. Senescent cell burden reduced (p16, p21 markers). SASP factors decreased.
PMID:28340339After several weeks of treatment, aged mice showed restored running wheel activity, improved fur density, and enhanced renal function. Tissue homeostasis improvements observed.
PMID:28340339Research-based observations
This timeline reflects observations from published clinical and preclinical studies. Individual responses may vary significantly. This is not a guarantee of effects or a dosing schedule. Consult qualified healthcare providers for personalized guidance.
Good Signs (6 indicators)
Warning Signs (5 indicators)
Bad Signs (6 indicators)
For Research Evaluation Only
These quality indicators are general guidelines based on typical peptide characteristics. Professional laboratory testing (HPLC, mass spectrometry) provides definitive quality verification. This checklist is for initial visual evaluation only.
Epithalon
CompatibleDifferent longevity mechanisms - FOXO4-DRI clears senescent cells while epithalon targets telomerase. No interaction studies but theoretically complementary.
Mots-C
CompatibleDifferent mechanisms - FOXO4-DRI clears senescent cells while MOTS-c targets AMPK metabolic pathways. No known interactions.
Ss-31
CompatibleDifferent targets - SS-31 protects mitochondria while FOXO4-DRI clears senescent cells. Potentially complementary for aging intervention.
Humanin
CautionOpposing mechanisms - humanin is anti-apoptotic while FOXO4-DRI promotes apoptosis in senescent cells. Could potentially counteract senolytic effects.
BPC-157
CautionUncertain interaction - BPC-157 promotes tissue repair which may involve senescent cell signaling. Effects on senolytic activity unknown.
Research Note: Interaction data is based on published literature, mechanistic understanding, and theoretical considerations. Most peptide combinations lack direct clinical study. This information is for educational purposes only and does not constitute medical advice. Always consult qualified healthcare providers.
Key Studies Cited
Full reference list available on request. All citations link to PubMed for verification.
This dossier synthesizes available evidence from peer-reviewed literature, regulatory documents, and clinical trial registries. Evidence strength ratings follow a modified GRADE approach.
For complete methodology details, see our Methodology page.
Important Disclaimer
This dossier is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making health decisions.
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Compare FOXO4-DRI
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