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Updated: Mar 17, 2026
Gene-therapy Inspired Polycation Coating for Protection of DNA Origami Nanostructures
Published on: January 19, 2019
New polymer of lactic-co-glycolic acid-modified polyethylenimine for nucleic acid delivery
Jian-Ming Lü1, Zhengdong Liang1, Xiaoxiao Wang1
1Division of Surgical Research, Michael E DeBakey Department of Surgery, Baylor College of Medicine, One Plaza, Houston, TX 77030, USA.
Aim:
To develop an improved delivery system for nucleic acids.
Materials & Methods:
We designed, synthesized and characterized a new polymer of lactic-co-glycolic acid-modified polyethylenimine (LGA-PEI). Functions of LGA-PEI polymer were determined.
Results:
The new LGA-PEI polymer spontaneously formed nanoparticles (NPs) with DNA or RNA, and showed higher DNA or RNA loading efficiency, higher or comparable transfection efficacy, and lower cytotoxicity in several cell types including PANC-1, Jurkat and HEK293 cells, when compared with lipofectamine 2000, branched or linear PEI (25 kDa). In nude mouse models, LGA-PEI showed higher delivery efficiency of plasmid DNA or miRNA mimic into pancreatic and ovarian xenograft tumors. LGA-PEI/DNA NPs showed much lower toxicity than control PEI NPs in mouse models.
Conclusion:
The new LGA-PEI polymer is a safer and more effective system to deliver DNA or RNA than PEI.
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