Statistical analysis Statistical analysis in this study was performed using SPSS Statistical Software (version 22.0, SPSS Inc., Chicago, IL, USA) and R Statistical Software (version 3.0.1, the R Foundation for Statistical Computing)
Recent high-level research has further illuminated the critical role of glutathione in the specific pathology of chronic neuroimmune diseases
FOXO4-DRI Key Research Facts Full name: FOXO4 D-Retro-Inverso peptide (FOXO4-DRI) Classification: Cell-penetrating senolytic peptide FOXO4/p53 protein-protein interaction inhibitor Design: D-retro-inverso isoform of FOXO4s p53-binding domain reversed sequence with all D-amino acids Binding target: p53 transactivation domain 2 (TAD2) displaces FOXO4 from the FOXO4-p53 complex Mechanism: FOXO4-DRI binds p53 TAD2 p53 nuclear exclusion p53 mitochondrial translocation BAX activation caspase-3 cleavage senescent cell-selective apoptosis Selectivity basis: FOXO4 is upregulated in senescent cells but expressed at low levels in most non-senescent adult cells selectivity is mechanistically conferred D-amino acid advantage: Proteolytic stability resistant to intracellular peptidases that would rapidly degrade equivalent L-amino acid sequences Structural characterisation: NMR structural models of FOXO4-DRI/p53TAD2 complex resolved (Nature Communications, 2025) confirms disordered-to-ordered transition upon binding Research cell types studied: IMR90 fibroblasts, TM3 Leydig cells, endothelial cells, chondrocytes, keloid fibroblasts, HCT116 cancer cells In vitro working concentration: 25 M used in multiple published studies for senescent cell apoptosis induction What Does FOXO4-DRI Do in Research
GLP-1R Trp 78 , Pro 90 , Trp 91 , and His 212 could form a hydrophobic region with GLP-1 Phe 28 , Ile 29 , Trp 31 , Leu 32 , and Val 33 , and GIPR Leu 35 , Trp 39 , Tyr 36 , Met 67 , Tyr 87 , Trp 90 , and His 115 could form a hydrophobic region with GIP Phe 22 , Val 23 , Trp 25 , Leu 26 , and Leu 27
