Detailed investigation on how the protein corona modulates the physicochemical properties and gene delivery of polyethylenimine (PEI) polyplexes

Biomaterials Science
Dingcheng ZhuYouqing Shen

Abstract

Given the various cationic polymers developed as non-viral gene delivery vectors, polyethylenimine (PEI) has been/is frequently used in in vitro transfection. However, the primary drawback limiting its in vivo applications is the sharp decrease in transfection efficiency in the presence of serum. Here, we investigated the influences of serum proteins or bovine serum albumin (BSA) on the physicochemical properties of PEI/DNA complexes (polyplexes), including hydrodynamic diameters and agglomeration behavior, zeta potentials, morphologies, and sensitivity to the presence of salt. Mechanism studies revealed that the protein corona determined the endocytic rates and pathways, intracellular transport, the rate of endo/lysosomal trafficking, vesicle escape efficiency, and thus the overall gene expression levels. This work offers mechanistic insights for the serum-induced suppression of transfection efficiency, which is the reduced endo/lysosomal escape of the protein-coated polyplexes, in contrast to the protein free polyplexes.

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Citations

Feb 23, 2020·Journal of Tissue Engineering and Regenerative Medicine·Noah Z LairdAliasger K Salem
Oct 17, 2019·Biomaterials Science·Kaiyao SunJessica M Rosenholm
Feb 14, 2019·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Wenjun HuangAnjie Dong
May 16, 2021·Advanced Materials·Zhen ZhangYouqing Shen
Nov 23, 2018·ACS Applied Materials & Interfaces·Jiajia XiangYouqing Shen
Jun 8, 2021·Journal of Controlled Release : Official Journal of the Controlled Release Society·Jayoung KimJordan J Green
Sep 28, 2021·ACS Applied Materials & Interfaces·Barbora SmolkováOleg Lunov

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Methods Mentioned

BETA
transfection
reduced
dynamic light scattering
transmission electron microscopy
electrophoresis
Fluorescence
flow
fluorescence microscopy
transfect
flow cytometry

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