Arginine-based biodegradable ether-ester polymers with low cytotoxicity as potential gene carriers

Area of Science:

• Biomaterials Science
• Gene Therapy
• Polymer Chemistry

Background:

• Gene therapy relies on safe and effective gene carriers (vectors).
• Current synthetic vectors like poly(ethylenimine) (PEI), poly(l-lysine) (PLL), and poly(l-arginine) (poly-Arg) have limitations.
• There is a need for improved and novel synthetic vectors with reduced toxicity.

Purpose of the Study:

• To develop novel biodegradable arginine-based ether-ester polycations.
• To evaluate the cytotoxicity and DNA complexation efficiency of these new polymers.
• To assess their potential as nonviral gene therapy vectors.

Main Methods:

• Synthesis of three classes of arginine-based ether-ester polycations (amides, urethanes, ureas).
• Cytotoxicity assessment using multiple cell lines (murine mammary carcinoma, human cervical adenocarcinoma, murine melanoma, mouse fibroblast).
• Evaluation of interaction with plasmid DNA to form complexes.

Main Results:

• The developed arginine-based ether-ester polycations exhibited significantly lower cytotoxicity compared to PEI, PLL, and poly-Arg.
• High cell viability was maintained even at polycation concentrations up to 2 mg/mL.
• The polymers formed compact and stable complexes with plasmid DNA.

Conclusions:

• Arginine-based ether-ester polycations represent a promising class of biodegradable nonviral vectors.
• These novel polymers offer a safer alternative for gene delivery applications.
• Further development could lead to enhanced gene therapy efficacy and safety.