Cationic multilamellar liposome-mediated gene transfer into primary myoblasts

Area of Science:

• Biotechnology
• Molecular Biology
• Cell Biology

Background:

• Gene delivery into primary myoblasts is crucial for muscle regeneration research.
• Liposomes are investigated as non-viral vectors for gene transfection.
• Developing safe and efficient gene transfer methods for primary cell cultures remains a challenge.

Purpose of the Study:

• To evaluate cationic multilamellar liposomes as a mediator for foreign gene transfer into primary myoblasts.
• To assess the efficiency and cytotoxicity of liposome-mediated gene delivery.

Main Methods:

• Preparation of cationic multilamellar liposomes from specific lipids (N-(alpha-trimethylammonioacetyl)-didodecyl-D-glutamate chloride, dilauroyl phosphatidylcholine, and dioleoyl phosphatidylethanolamine) in a 1:2:2 molar ratio.
• Transfection of primary myoblasts with plasmids encoding luciferase (pRSV-luc) or beta-galactosidase (pRSV-lacZ) encapsulated in the liposomes.
• Assessment of gene expression (luciferase and beta-galactosidase activity) and cellular cytotoxicity.

Main Results:

• High efficiency of luciferase expression was achieved when transfecting myoblasts with pRSV-luc encapsulated in 50 nmol of liposomes (using 2 micrograms of plasmid).
• No significant cytotoxicity was observed with the liposome-mediated gene transfer.
• Expression of beta-galactosidase was detected in 0.7% of cultured myoblasts transfected with pRSV-lacZ using the same liposome formulation, also without cytotoxicity.

Conclusions:

• Cationic multilamellar liposomes are effective and non-cytotoxic mediators for transferring foreign genes into primary myoblast cultures.
• This study represents the first successful demonstration of liposome-mediated gene delivery into primary myoblasts.
• The developed liposome formulation holds promise for applications in muscle cell research and gene therapy.