Effective polyethyleneimine-mediated gene transfer into zebrafish cells

Area of Science:

• Biotechnology
• Molecular Biology
• Zebrafish Research

Background:

• Nonviral gene delivery is crucial for genetic research.
• Polyethyleneimine (PEI) is a widely studied gene carrier.
• Zebrafish cells (ZF4) are a relevant model for gene transfer studies.

Purpose of the Study:

• To evaluate Polyethyleneimine (PEI) as a gene carrier for zebrafish cells (ZF4).
• To compare PEI's transfection efficiency with lipofectamine.
• To characterize PEI-DNA complexes for gene delivery.

Main Methods:

• Formation and characterization of PEI-DNA complexes.
• Particle size, surface charge, and morphology analysis (TEM).
• Cytotoxicity, gel retardation, flow cytometry, and luciferase activity assays.

Main Results:

• PEI-DNA complexes showed optimal size (132 nm) and surface charge (29 mV) at a charge ratio of 8.
• PEI achieved 27% transfection efficiency, exceeding lipofectamine.
• Complete DNA binding by PEI was confirmed at a charge ratio of 4.
• PEI demonstrated lower cytotoxicity compared to controls at effective ratios.

Conclusions:

• Polyethyleneimine (PEI) is an effective nonviral gene carrier for zebrafish cells.
• PEI offers superior transfection efficiency and reporter gene expression compared to lipofectamine.
• PEI-mediated gene transfer presents a viable tool for zebrafish cell research.