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Self-assembling peptide dimers with multifunctionalities for gene delivery systems

机译:具有基因递送系统的多功能性的自组装肽二聚体

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Peptides have been used in various biomedical fields including gene and drug delivery systems. In this study, multifunctional peptide dimer (MPD) was utilized for gene delivery systems. The peptide monomer consists of cellular penetrating peptide moiety (R_8), MMP-2 specific sequence (GPLGV), pH-responsive moiety (H_5) and hydrophobic moiety (palmitic acid) (CR_8GPLGVH_5-Pal). MPD was formed by DMSO oxidation of thiols in terminal cysteine residues. MPD could condense pDNA successfully and self-assemble into sub-micron particles via hydrophobic interaction. MPD showed low cytotoxicity in comparison with PEI25k. MPD polyplex showed low transfection efficiency in HEK293 cells expressing no MMP-2 but high transfection efficiency in A549 cells expressing MMP-2, meaning the enhanced transfection efficiency by MMP-induced structural change. This result shows the potential of MPD for targeted gene delivery systems.
机译:肽已用于包括基因和药物递送系统的各种生物医学领域。在该研究中,利用多官能肽二聚体(MPD)进行基因递送系统。肽单体由细胞渗透肽部分(R_8),MMP-2特异性序列(GPLGV),pH-响应部分(H_5)和疏水部分(棕榈酸)(CR_8GPLGVH_5-PAL)组成。通过在末端半胱氨酸残基中的硫醇的DMSO氧化形成MPD。 MPD可以通过疏水相互作用成功地和自组装成亚微米颗粒。与PEI25K相比,MPD显示出低细胞毒性。 MPD多分发显示HEK293细胞中的低转染效率,表达在表达MMP-2的A549细胞中的NOMP-2但高转染效率,这意味着MMP诱导的结构变化的转染效率提高。该结果表明了靶向基因递送系统的MPD的潜力。

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