Block Copolymer/Plasmid DNA Micelles Postmodified with Functional Peptides via Thiol-Maleimide Conjugation for Efficient Gene Delivery into Plants.

Abstract:

:Introducing exogenous genes into plant cells is essential for a wide range of applications in agriculture and plant biotechnology fields. Cationic peptide carriers with cell-penetrating and DNA-binding domains successfully deliver exogenous genes into plants. However, their cell-penetrating activity may be attenuated by undesired electrostatic interactions between the cell-penetrating peptide (CPP) domain and DNA cargo, resulting in limited gene delivery efficiency. Here, we developed the block copolymer maleimide-conjugated tetra(ethylene glycol) and poly(l-lysine) (MAL-TEG-PLL). Through electrostatic interactions with plasmid DNA (pDNA), MAL-TEG-PLL formed a micelle that presented maleimide groups on its surface. The micelle enabled postmodification with cysteine-containing functional peptides, including a CPP (BP100-Cys) and nuclear localization signal (Cys-NLS) via thiol-maleimide conjugation, thereby avoiding undesired interactions. According to a comparison of gene delivery efficiencies among the peptide-postmodified micelles, the amount of BP100-Cys on the micelle surface was key for efficient gene delivery. The BP100-postmodified micelle showed more efficient delivery compared with that of the BP100-premodified micelle. Thus, postmodification of polymeric micelles with functional peptides opens the door to designing highly efficient plant gene delivery systems.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Miyamoto T,Tsuchiya K,Numata K

doi

10.1021/acs.biomac.8b01304

subject

Has Abstract

pub_date

2019-02-11 00:00:00

pages

653-661

issue

2

eissn

1525-7797

issn

1526-4602

journal_volume

20

pub_type

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