US Patent No. 10,596,269

DELIVERING ENHANCED ACTIVE AGENTS


Patent No. 10,596,269
Issue Date March 24, 2020
Title Delivering Enhanced Active Agents
Inventorship Mamoun M. Alhamadsheh, Stockton, CA (US)
Miki S. Park, Stockton, CA (US)
William K. Chan, Elk Grove, CA (US)
Xiaoling Li, Dublin, CA (US)
Sravan C. Penchala, Stockton, CA (US)
Mark R. Miller, Stockton, CA (US)
Assignee Mamoun M. Alhamadsheh, Stockton, CA (US)

Claim of US Patent No. 10,596,269

1. A method of administering an enhanced active agent to a subject, the method comprising: obtaining a conjugated active agent including an active agent and a delivery system for the agent, the delivery system having;a ligand that is selective for transthyretin in the serum of the subject; and,
a linker configured for operatively attaching the ligand covalently to the active agent, the linker selected to cause release of the active agent from the transthyretin in the subject as the conjugated active agent, wherein the linker ranges from 14-20 angstroms in length;
wherein, the delivery system has a structure comprising:

where,
n is 1 to 8;
R1 and R3 are independently selected from a short chain alkyl having 1 to 4 carbon atoms;
R2 is selected from the group consisting of a hydrogen, a short chain alkyl having 1 to 4 carbon atoms, and an aryl;
Xa is C(R4)(R5), O, N—R5, or S; where R4 and R5 are independently selected from hydrogen, an alkyl having 1 to 4 carbon atoms, a substituted alkyl, an alkoxy, hydroxyl, an alkoxycarbonyl, an an amino;
Ra is CHO, COOH, COOCH3, COOR6, CONR7R8, tetrazolyl, CONHOH, B(OH)2, CONHSO2Ar, CONHCH(R9)COOH, halogen, acyl, substituted acyl, carboxyl, heterocyclic group, sulfonamide, sulfonyl fluoride, thioester, alkoxycarbonyl or substituted alkoxycarbonyl;
Rb is the linker and is positioned ortho or meta to Ra, the linker including a CHO, COOH, COOCH3, COOR6, CONR7R8, tetrazolyl, CONHOH, B(OH)2, CONHSO2Ar, CONHCH(R)COOH, CF3, hydrogen, halogen, alkyl, substituted alkyl, acyl, substituted acyl, carboxyl, heterocyclic group, sulfonamide, sulfonyl fluoride, ester, thioester, ether, thioether, triazolyl, alkoxycarbonyl or substituted alkoxycarbonyl;
R6 is alkyl, haloalkyl, cycloalkyl, or heterocyclyl;
R7 and R8 are each independently hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl, or heteroaryl; and,
R9 is the side chain of a naturally occurring ?-amino carboxylic acid;
or, a pharmaceutically acceptable salt, ester, enol ether, enol ester, amide, acetal, ketal, orthoester, hemiacetal, hemiketal, hydrate, solvate or prodrug thereof; and administering the conjugated active agent to the subject.