Synthesis and biological characterisation of targeted pro-apoptotic peptide

Chembiochem : a European Journal of Chemical Biology
Stéphanie FoillardPascal Dumy

Abstract

We report herein the synthesis and in vitro assay of new, multimeric RGD-peptide conjugates for cell-targeted drug delivery. We generated a peptide scaffold comprising two functional domains, one a tumour blood vessel "homing" motif and the other a programmed cell-death-inducing peptide sequence. RGD peptides were selected to direct the molecular conjugate to alpha(V)beta(3) integrin-containing tumour cells. The pro-apoptotic (Lys-Leu-Ala-Lys-Leu-Ala-Lys)(2) peptide was found to be nontoxic outside cells, but toxic when internalized into targeted cells as it disrupted the mitochondrial membrane. The synthesis of these targeted pro-apoptotic conjugates was carried out by assembling three different units (that is, scaffold, RGD units and pro-apoptotic peptide) through chemoselective ligations. We show that one compound displays significant biological effect in alpha(V)beta(3) integrin-containing tumour cells.

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Citations

Jun 3, 2011·Pharmaceutical Research·Netanel KolevzonEylon Yavin
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