Northwestern University

The University of Texas System

Robert C MacDonald

Gary W Ashley

Miho Shida

David D Mcpherson

Shaoling Huang

Patrick Kee

Li Wang

The present invention provides gas-containing liposomes. In particular, the present invention provide methods of generating gas-containing liposomes where the gas is introduced under pressure, as well as gas-containing liposomes which contain a large volume of gas (e.g., 10 ul of gas per 5 mg of gas-containing liposomes). In certain embodiments, the gas-containing liposomes contain nitric oxide gas. In some embodiments, such nitric oxide containing liposomes are used to treat a medical condition that is treatable by nitric oxide gas (e.g., intimal hyperplasia).

Gas-containing liposomes

The present invention provides optimized transfection reagents comprising mixtures of cationiclipoids. In particular, the present invention provides DNA delivery vehicles based on identifying the optimal hydrophobicity of novel cationic phospholipid derivatives that, alone or in combination, form complexes with DNA (lipoplexes) and exhibit enhanced transfection activity.

Combinations of transfection lipids exhibiting increased transfection efficiencies

A novel class of cationic phospholipids and novel method for their synthesis are disclosed. The class of phospholipids comprises phosphotriester derivatives of phosphoglycerides and sphingolipids. It has been unexpectedly found that liposomes comprising one or more of these cationic phospholipids are effective in the lipofection of nucleic acids. These novel phospholipids are particularly attractive because of they are not only effective in lipofection, but are extremely cheap and easy to male.

Cationic phospholipids for transfection

Cationic phospholipids and their use in treating pathogen-associated disease are disclosed. The class of phospholipids comprises the phosphotriester derivatives of phosphoglycerides and sphingolipids. Liposomes comprising one or more of the cationic phospholipids are effective in the lipofection of nuclidic acids and are therefore useful in methods of treating disease.

A novel class of cationic phospholipids and novel method for their synthesis are disclosed. The class of phospholipids comprises phosphotriester derivatives of phosphoglycerides and sphingolipids. It has been unexpectedly found that liposomes comprising one or more of these cationic phospholipids are effective in the lipofection of nucleic acids. These novel phospholipids are particularly attractive because of they are not only effective in lipofection, but are extremely cheap and easy to make.

A novel class of cationic phospholipids and a novel method for their synthesis are disclosed. The class of phospholipids comprises phosphotriester derivatives of phosphoglycerides and sphingolipids. It has been unexpectedly found that liposomes comprising one or more of these cationic phospholipids are effective in the lipofection of nucleic lacids. These novel phospholipids are particularly attractive because they are extremely cheap and easy to make.

Large size liposomes are produced from small unilamellar vesicles by incorporating a polar compound in an aqueous dispersion of the vesicles, subjecting the dispersion to repeated freeze-thaw cycles, and thereafter dialyzing the vesicles against a hypoosmotic medium. The freeze-thaw cycles aggregate the vesicles and increase their internal concentration of polar compound. During dialysis the vesicles imbibe water, rupture, and form enlarged liposomes.

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Evanston, IL, United States of America

Robert C MacDonald