Claims for Patent: 3,959,078

Summary for Patent: 3,959,078

Title:	Enzyme immobilization with a thermochemical-photochemical bifunctional agent
Abstract:	Enzymes are immobilized by thermochemically attaching to a solid support material a bifunctional agent initially possessing thermochemical-photochemical functional substituents followed by photochemically activating the bifunctional agent and covalently bonding an enzyme thereto. Preferred bifunctional agents are arylazides which allow activation by visible light.
Inventor(s):	Guire; Patrick E. (Kansas City, MO)
Assignee:	Midwest Research Institute (Kansas City, MO)
Application Number:	05/361,545
Patent Claims:	1. A process for immobilization of an active enzyme on a solid support material which comprises: a. thermochemically attaching to a solid support material an aryl azide bifunctional agent initially possessing both a thermochemically active functional substituent and a photochemically active functional substituent; b. photochemically activating the azide substituent of the product of step (a); and c. reacting the photoactivated azide substituent of the product of step (b) with an enzyme to form a covalent linkage therewith. 2. The process of claim 1 wherein step (a) is carried out in the absence of visible light of such intensity as to substantially affect the photochemically active functional substituent of the bifunctional agent. 3. A process in accordance with claim 1 wherein the solid support material is selected from the group consisting of alkylamine glass and aminoethyl cellulose. 4. A process in accordance with claim 1 wherein the solid support material is alkylamine glass and the bifunctional agent is 1-fluoro-2-nitro-4-azidobenzene. 5. A process in accordance with claim 1 wherein the solid support material is alkylamine glass and the bifunctional agent is 1-fluoro-2,4-dinitro-5-azidobenzene. 6. A process in accordance with claim 1 wherein the solid support material is aminoethyl cellulose and the bifunctional agent is 1-fluoro-2-nitro-4-azidobenzene. 7. A process in accordance with claim 1 wherein the solid support material is aminoethyl cellulose and the bifunctional agent is 1-fluoro-2,4-dinitro-5-azidobenzene. 8. A process in accordance with claim 1 wherein the solid support material is an agarose. 9. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 1. 10. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 3. 11. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 4. 12. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 5. 13. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 6. 14. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 7. 15. An active immobilized enzyme in accordance with claim 9 wherein the covalently bound enzyme is asparaginase. 16. An active immobilized enzyme in accordance with claim 9 wherein the covalently bound enzyme is invertase. 17. An active immobilized enzyme in accordance with claim 9 wherein the covalently bound enzyme is peroxidase. 18. An active immobilized enzyme in accordance with claim 9 wherein the covalently bound enzyme is glucose oxidase. 19. A process for immobilization of an active enzyme on a solid support material which comprises a. reacting alkylamine glass with 1-fluoro-2,4-dinitrobenzene to form a dinitrophenyl derivative of the alkylamine glass; b. reducing the dinitrophenyl derivative to form an aminonitrophenyl derivative of alkylamine glass; c. treating the aminonitrophenyl derivative of alkylamine glass with nitrous acid to form a nitrophenyldiazonium derivative of alkylamine glass; d. substituting the nitrophenyldiazonium derivative with an azide ion to form a nitroazidophenyl derivative of alkylamine glass; e. photochemically activating the nitroazidophenyl derivative of alkylamine glass; and f. reacting the photochemically activated product of step (e) with an enzyme to form a covalent linkage therewith. 20. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 19. 21. A process for immobilization of an active enzyme on a solid support material which comprises a. reacting aminoethyl cellulose with 1-fluoro-2,4-dinitrobenzene to form a dinitrophenyl derivative of the aminoethyl cellulose; b. reducing the dinitrophenyl derivative to form an aminonitrophenyl derivative of aminoethyl cellulose; c. treating the aminonitrophenyl derivative of aminoethyl cellulose with nitrous acid to form a nitrophenyldiazonium derivative of aminoethyl cellulose; d. substituting the nitrophenyldiazonium derivative with an azide ion to form a nitroazidophenyl derivative of aminoethyl cellulose; e. photochemically activating the nitroazidophenyl derivative of aminoethyl cellulose; and f. reacting the photochemically activated product of step (e) with an enzyme to form a covalent linkage therewith. 22. An active enzyme immobilized on a solid support material produced in accordance with the process of claim 21.

Details for Patent 3,959,078

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Recordati Rare Diseases, Inc.	ELSPAR	asparaginase	For Injection	101063	01/10/1978		2039-03-29