Biodegradable polymeric vectors for gene delivery to human endothelial cells

Area of Science:

• Biomaterials Science
• Gene Therapy
• Cell Biology

Background:

• Endothelial cells are crucial in cardiovascular disease and cancer, regulating vascular function and angiogenesis.
• Effective and safe gene delivery to primary endothelial cells is hindered by serum proteins.

Purpose of the Study:

• To develop and optimize biodegradable poly(beta-amino esters) as efficient and safe gene delivery vectors for endothelial cells in serum.
• To investigate the relationship between vector biophysical properties, serum interactions, and transfection efficacy.

Main Methods:

• Synthesis and optimization of a library of biodegradable poly(beta-amino esters).
• Evaluation of vector efficacy and cytotoxicity in human umbilical vein endothelial cells (HUVECs) under serum conditions.
• Analysis of biophysical properties (particle size, zeta potential, stability) in buffer and serum.

Main Results:

• Poly(beta-amino ester) vectors demonstrated differential biophysical property changes in serum, correlating with transfection efficacy.
• Optimized vectors achieved significantly higher transfection rates in HUVECs with serum compared to commercial reagents like jetPEI and Lipofectamine 2000.
• Leading vectors showed high efficacy (47 +/- 9% positive transfection) in HUVECs within a serum environment.

Conclusions:

• Biodegradable poly(beta-amino esters) represent a promising new class of biomaterials for gene therapy.
• These vectors overcome the challenge of gene delivery to endothelial cells in the presence of serum proteins.
• The findings support the potential of poly(beta-amino esters) for effective human endothelial cell gene therapy.