Monoclonal antibody antagonists for treating medical problems associated with d-amphetamine-like drugs
View Patent ↗The present invention provides synthetic immunochemical haptens for the generation of antibodies that are designed to recognize the common molecular features of d-methamphetamine-like abused stimulants with insignificant cross-reactivity to endogenous substrates (e.g. dopamine) or over-the-counter medications (e.g. 1-methamphetamine, pseudoephedrine, phenylpropanolamine and ephedrine). These monoclonal antibodies and their antigen binding fragments are useful in treatment plans for recovering addicts, in emergency room settings for rapidly reversing a drug overdose, in protection of fetuses from drug-abusing pregnant mothers or in a psychiatric setting to reduce the exacerbation of psychotic disorders caused by stimulant drugs.
1. A monoclonal antibody or an antigen binding fragment thereof that specifically recognizes d-methamphetamine, d-amphetamine, (+/−) 3,4-methylenedioxymethamphetamine or (+/−) 3,4-methylenedioxyamphetamine, wherein said monoclonal antibody or the antigen binding fragment thereof is generated using an immunogen comprising a substituted d-methamphetamine as a hapten and an immunogenic carrier, wherein said substituted d-methamphetamine has a structure
wherein R is substituted on the aromatic ring at one of C2, C3 or C4;
wherein R is —ZR 2 COOR 1 ;
Z is O or S;
R 1 is H or R 4 ;
R 2 is a C 2-9 alkyl chain containing an O or a N(R 3 ) moiety therein, a C 2-9 alkenyl chain or a C 2-9 alkynyl chain;
R 3 is C 1-5 alkyl; and
R 4 is —CH 2 CH 2 CN, 4-nitrophenyl, 2,3,4,5,6-pentafluorophenyl; or 2,3,5-trichlorophenyl; or a hydrochloride salt thereof.
2. The monoclonal antibody of claim 1 , wherein said antibody is monoclonal antibody 6H8 or wherein said antibody is monoclonal antibody 6H4.
3. The monoclonal antibody of claim 1 , wherein R is OCH 2 CH═CH(CH 2 ) x COOH, and x is 1 to 6.
4. The monoclonal antibody of claim 1 , wherein R is OCH 2 C═C(CH 2 ) x COOH, and x is 1 to 6.
5. The monoclonal antibody of claim 1 , wherein R is O(CH 2 ) x O(CH 2 ) y COOH, and x is 2 to 4, y is 1 to 5.
6. The monoclonal antibody of claim 1 , wherein R is O(CH 2 ) x NR 3 (CH2) y COOH, x is 2 to 3 and y is 1 to 5.
7. The monoclonal antibody of claim 1 , wherein R is SCH 2 CH═CH(CH 2 ) x COOH, and x is 1 to 6.
8. The monoclonal antibody of claim 1 , wherein R is SCH 2 C═C(CH 2 ) x COOH, and x is from 1 to 6.
9. The monoclonal antibody of claim 1 , wherein R is S(CH 2 ) x O(CH 2 ) y COOH, and x is 2 to 4, y is 1 to 5.
10. The monoclonal antibody of claim 1 , wherein R is S(CH 2 ) x NR 3 (CH 2 ) y COOH, x is 2 to 3 and y is from 1 to 5.