Patent ID: 8658204

Claim:
A method for treating a disease of lung tissue, comprising the step of administering to a lung of a patient suffering from the disease of lung tissue a therapeutically effective amount of a liposome preparation for pulmonary administration in which a drug or a gene is encapsulated in a liposome having a liposome membrane surface-modified with a terminal hydrophobized polyvinyl alcohol, thereby transferring the drug or the gene to a lung tissue surface or surface cells, wherein the liposome contains the terminal hydrophobized polyvinyl alcohol in a proportion of 10 to 200 parts by weight, per 100 parts by weight of a total amount of a constituent component of the liposomal membrane and the terminal hydrophobized polyvinyl alcohol is a terminal hydrophobized polyvinyl alcohol in which a hydrophobic group is a linear thioalkyl group having 5 to 25 carbon atoms.