Patent ID: 8367631

Claim:
A lyophilized form of a pharmaceutically acceptable injectable composition, the pharmaceutically acceptable injectable composition comprising: at least one nucleic acid; a Tyrode's medium comprising: 140 mM NaCl, 6 mM KCl, 3 mM CaC1 2 , 2 mM MgC1 2 , 10 mM Hepes, pH 7.4, and 10 mM glucose; and a tetrafunctional copolymer of formula (I): where: x and y represent, independently of one another, an integer of between 1 and 500, and the tetrafunctional copolymer is in a form of a mineral salt wherein said tetrafunctional copolymer is in a cationic form; wherein the compound of formula (I) has a molecular weight of between 1,000 and 25,000 g/mol and an EO/PO ratio of 0.8 to 1.2.