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Sökning: WFRF:(Gestin Maxime 1990 ) > (2022)

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1.
  • Falato, Luca, et al. (författare)
  • PepFect14 Signaling and Transfection
  • 2022. - Third
  • Ingår i: Cell Penetrating Peptides. - New York : Humana Press. - 9781071617519 - 9781071617526 ; , s. 229-246
  • Bokkapitel (refereegranskat)abstract
    • PepFect14 is a cell-penetrating peptide (CPP) derived from stearylated transportan-10 (strearil-TP10) with which it shares the stearic acid residue on C′ terminus and the amino acid sequence except for lysines that in PepFect14 are substituted with ornithines. Being non-proteinogenic amino acids, ornithines make PepFect14 less sensitive to serum proteases and due to its positive charges the CPP can form complexes with negatively charged cargos, such as splice correcting oligonucleotides (SCOs), plasmid DNA (pDNA), and proteins. It has been reported that PepFect14/SCO complexes enter the cells mainly through endocytosis, in particular: macopinocitosys and caveolae-mediated endocytosis through the interaction with two receptors of the scavenger receptors class A family (SCARAs). PepFect14 and its complexes trigger the chaperone-mediated autophagy response involving the heat shock protein family (HSP70) whose inhibition leads to an increase of PepFect14 transfection efficacy. Exploiting the interaction between HSP70 and PepFect14 and their ability to form nanoparticle. HSP70 has been delivered in Bomirsky Hamster Melanoma cells (BHM) using PepFect14 of which a protocol is described at the end of this chapter. 
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2.
  • Gestin, Maxime, 1990-, et al. (författare)
  • Transfection of Heat Shock Protein 70 kDa (HSP70)
  • 2022
  • Ingår i: International Journal of Peptide Research and Therapeutics. - : Springer Science and Business Media LLC. - 1573-3904 .- 1573-3149. ; 28:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Heat shock protein 70 kDa (HSP70) is a major protein family in the cell protections against stress-induced denaturation and aggregation and in the folding of nascent proteins. It is a highly conserved protein that can be found in most organisms and is strongly connected to several intracellular pathways such as protein folding and refolding, protein degradation and regulation, and protection against intense stress. Cellular delivery of HSP70 would be of high impact for clarification of its role in these cellular processes.PepFect14 is a cell-penetrating peptide known to be able to mediate the transfection of various oligonucleotides to multiple cell lines with a higher efficacy than most commercially available transfection agents and without inducing significant toxic effects.In this study we demonstrated that PepFect14 was able to form a complex with HSP70 and to deliver it inside cells in the same fashion with oligonucleotide delivery. The delivered HSP70 showed an effect in the cell regulation indicating that the protein was biologically available in the cytoplasm and the interactions with PepFect14 did not impeach its active sites once the plasma barrier crossed.This study reports the first successful delivery of HSP70 to our knowledge and the first protein transfection mediated by PepFect14. It opens new fields of research for both PepFect14 as a delivery agent and HSP70 as a therapeutic agent; with potential in peptide aggregation caused diseases such as Parkinson’s and Alzheimer’s diseases.
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