Multivalency: Key Feature in Overcoming Drug Resistance with a Cleavable Cell-Penetrating Peptide-Doxorubicin Conjugate
作者:Marco Lelle、Christoph Freidel、Stefka Kaloyanova、Klaus Müllen、Kalina Peneva
DOI:10.1007/s10989-017-9622-4
日期:2018.9
Multivalency is often used in biological systems, to increase affinity and specificity through avidity. This inspired us to prepare a synthetic bioconjugate that mimics natural multivalent systems. It is composed of doxorubicin and two octaarginine cell-penetrating peptides, to strengthen the electrostatic interactions between the negatively charged glycosaminoglycans of the plasma membrane and the guanidinium groups of the arginine residues. The multivalent conjugate has improved cellular uptake and cytotoxicity, compared to a peptide-drug conjugate with only one polyarginine and as a result it can overcome drug resistance in Kelly-ADR cells. The synthetic approach and the multivalent structure reported here can be used further as model systems, to gain insight into the biological interaction of cell-penetrating peptides with artificial membranes or for the preparation of more complex multimers.
多价性常用于生物系统中,通过亲合力提高亲和性和特异性。这启发我们制备一种模拟天然多价系统的合成生物偶联物。它由阿霉素和两个八精氨酸细胞穿透肽组成,以加强阴离子氨基聚糖的等离子体膜与精氨酸残基的胍基之间的静电相互作用。与仅含有一个多精氨酸的肽-药物偶联物相比,多价偶联物提高了细胞摄取和细胞毒性,因此能够克服对Kelly-ADR细胞的药物耐受性。这里所报道的合成方法和多价结构可以进一步作为模型系统,用于深入了解细胞穿透肽与人工膜的生物相互作用,或用于制备更复杂的多元聚合物。