Structure-Based Design of Long-Acting Cocaine Hydrolase Mutants for Treatment
Summary
The European Patent Office published patent application EP4262851A1 on March 25, 2026, covering engineered cocaine hydrolase enzyme mutants designed for long-acting treatment of substance use disorders and organophosphorus toxicity. The application was filed by the University of Kentucky Research Foundation with inventors Zhan, Chang-Guo and Zheng, Fang. This A1 publication makes the application publicly available and establishes priority rights.
What changed
The EPO published application EP4262851A1, a patent covering structure-based design of long-acting cocaine hydrolase mutants for therapeutic use in treating cocaine addiction and organophosphorus poisoning. The application designates all EU member states plus other European countries. The technology involves engineered enzymes with enhanced stability and extended biological half-life compared to native cocaine hydrolase.
This publication does not create compliance obligations. Organizations developing similar cocaine-metabolizing enzyme therapeutics or researching enzyme-based addiction treatments should review the claims to assess potential freedom-to-operate implications. The publication establishes a priority date for the applicants; no third-party actions are required at this stage.
Source document (simplified)
STRUCTURE-BASED DESIGN OF LONG-ACTING COCAINE HYDROLASE MUTANTS FOR TREATMENT OF SUBSTANCE USE DISORDERS AND ORGANOPHOSPHORUS TOXICITY
Publication EP4262851A1 Kind: A1 Mar 25, 2026
Applicants
University Of Kentucky Research Foundation
Inventors
ZHAN, Chang-Guo, ZHENG, Fang
IPC Classifications
A61K 38/46 20060101AFI20241003BHEP C12N 9/14 20060101ALI20241003BHEP C12N 9/18 20060101ALI20241003BHEP C12N 9/00 20060101ALI20241003BHEP A61P 25/00 20060101ALI20241003BHEP A61P 25/30 20060101ALI20241003BHEP
Designated States
AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
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