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Porous nanoparticle-supported lipid bilayers (protocells) for targeted delivery and methods of using same

United States Patent

February 28, 2017
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The present invention is directed to protocells for specific targeting of hepatocellular and other cancer cells which comprise a nanoporous silica core with a supported lipid bilayer; at least one agent which facilitates cancer cell death (such as a traditional small molecule, a macromolecular cargo (e.g. siRNA or a protein toxin such as ricin toxin A-chain or diphtheria toxin A-chain) and/or a histone-packaged plasmid DNA disposed within the nanoporous silica core (preferably supercoiled in order to more efficiently package the DNA into protocells) which is optionally modified with a nuclear localization sequence to assist in localizing protocells within the nucleus of the cancer cell and the ability to express peptides involved in therapy (apoptosis/cell death) of the cancer cell or as a reporter, a targeting peptide which targets cancer cells in tissue to be treated such that binding of the protocell to the targeted cells is specific and enhanced and a fusogenic peptide that promotes endosomal escape of protocells and encapsulated DNA. Protocells according to the present invention may be used to treat cancer, especially including hepatocellular (liver) cancer using novel binding peptides (c-MET peptides) which selectively bind to hepatocellular tissue or to function in diagnosis of cancer, including cancer treatment and drug discovery.
Brinker; C. Jeffrey (Albuquerque, NM), Carnes; Eric C. (Albuquerque, NM), Ashley; Carlee Erin (Albuquerque, NM), Willman; Cheryl L. (Albuquerque, NM)
STC.UNM (Albuquerque, NM), Sandia Corporation (Albuquerque, NM)
14/ 113,371
April 27, 2012
RELATED APPLICATIONS AND GOVERNMENT SUPPORT This invention was made with government support under grant no. U01CA151792 of the National Institutes of Health; grant nos. DE-AC04-94AL85000, LDRD 141704 and LDRD 151379 of the Department of Energy. The government has certain rights in the invention. This invention was made with government support under grant no. PHS 2 PN2 EY016570B of the National Institutes of Health; grant no. awarded by 1U01CA151792-01 of the National Cancer Institute; grant no. FA 9550-07-1-0054/9550-10-1-0054 of the Air Force Office of Scientific Research; 1U19ES019528-01 of NIEHS; NSF:EF-0820117 of the National Science Foundation and DGE-0504276 of the National Science Foundation. The government has certain rights in the invention.