The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 23, 2001
Filed:
May. 20, 1999
Expression Genetics, Inc., Salt Lake City, UT (US);
Abstract
A compound for targeted gene delivery is provided consisting of polyethylene glycol (PEG) grafted poly(L-lysine) (PLL) and a targeting moiety, wherein at least one free amino function of the PLL is substituted with the targeting moiety, and the grafted PLL contains at least 50% unsubstituted free amino function groups. TM is preferably lactose or galactose which are capable of specifically targeting a hepatoma cell or a liver cell. The new synthetic carriers with various substitution ratios of targeting moiety-PEG were characterized using NMR spectroscopy. The new polymeric gene carriers of this invention are capable of forming stable and soluble complexes with nucleic acids, which in turn are able to efficiently transform cells. PEG attached to the PLL gives better solubility properties to the gene/carrier complex and improved transfection efficiency without considerable cytotoxicity. Methods of preparing and using the targeting moiety-PEG-PLL as gene carriers to efficiently transfect cells are disclosed.