Abstract: The present invention relates to non-viral gene therapy methods and compositions for treatment of hyperproliferative disease in humans. More specifically, the invention is directed, in one embodiment, to lipid formulations which form stable liposome structures, capable of efficient in vivo nucleic acid transfer. In other embodiments, methods and compositions are directed to liposome transfer of anti-proliferative nucleic acids, wherein the transfer of the nucleic acids is cell specific via cell specific targeting moieties. The present invention, thus provides non-viral, liposome compositions and methods of gene transfer particularly useful for targeting and treating hyperproliferative disease.