4.7 Article

Synthesis, biological studies and molecular dynamics of new anticancer RGD-based peptide conjugates for targeted drug delivery

期刊

BIOORGANIC & MEDICINAL CHEMISTRY
卷 24, 期 2, 页码 294-303

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmc.2015.12.020

关键词

RGD; Conjugate; Targeted drug delivery; Chemo-stability; Bio-stability; Cancer; Drug release profiles; Molecular dynamics

资金

  1. Ariel University Internal Research and Development Program

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New cyclic RGD peptide-anticancer agent conjugates, with different chemical functionalities attached to the parent peptide were synthesized in order to evaluate their biological activities and to provide a comparative study of their drug release profiles. The Integrin binding c(RGDfK) penta-peptide was used for the synthesis of Camptothecin (CPT) carbamate and Chlorambucil (CLB) amide conjugates. Substitution of the amino acid Lys with Ser resulted in a modified c(RGDfS) with a new attachment site, which enabled the synthesis of an ester CLB conjugate. Functional versatility of the conjugates was reflected in the variability of their drug release profiles, while the conserved RGD sequence of a selective binding to the alpha(v) integrin family, likely preserved their recognition by the Integrin and consequently their favorable toxicity towards targeted cancer cells. This hypothesis was supported by a computational analysis suggesting that all conjugates occupy conformational spaces similar to that of the Integrin bound bio-active parent peptide. (C) 2015 Elsevier Ltd. All rights reserved.

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