The present invention relates to a polyphenol-peptide conjugate composed of: (i) a peptide comprising the amino acid sequence Arg-Arg-X1-Leu, wherein X1 refers to one or two hydrophobic amino acids selected independently from lie, Leu, Val, Phe, Trp, and Met; (ii) at least one polyphenol which is covalently bound to the peptide; and (iii) optionally at least one cargo which, if present, is covalently bound to the peptide. The polyphenol-peptide conjugate can be encapsulated with silica. The invention thus also provides silica particles comprising the polyphenol-peptide conjugate encapsulated by a silica shell. The silica particles allow the efficient cellular uptake and targeted delivery of the polyphenol-peptide conjugate into the cell nucleus, and can therefore advantageously be used for nuclear-targeted gene or drug delivery.
本发明涉及一种由以下组成的多
酚-肽共轭物:(i)包括
氨基酸序列Arg-Arg-X1-Leu的肽,其中X1是从lie、Leu、Val、Phe、Trp和Met中独立选择的一个或两个疏
水性
氨基酸;(ii)至少一种共价结合到肽上的多
酚;以及(iii)可选地,至少一种共价结合到肽上的载荷。多
酚-肽共轭物可以被
硅化物封装。因此,本发明还提供了由
硅壳封装的多
酚-肽共轭物的
硅颗粒。
硅颗粒能够有效地被细胞摄取并定向传递到细胞核中,因此可以有利地用于核靶向
基因或药物传递。