Chemical polysialylation of human recombinant butyrylcholinesterase delivers a long-acting bioscavenger for nerve agents in vivo.

ABSTRACT: The creation of effective bioscavengers as a pretreatment for exposure to nerve agents is a challenging medical objective. We report a recombinant method using chemical polysialylation to generate bioscavengers stable in the bloodstream. Development of a CHO-based expression system using genes encoding human butyrylcholinesterase and a proline-rich peptide under elongation factor promoter control resulted in self-assembling, active enzyme multimers. Polysialylation gives bioscavengers with enhanced pharmacokinetics which protect mice against 4.2 LD(50) of S-(2-(diethylamino)ethyl) O-isobutyl methanephosphonothioate without perturbation of long-term behavior.

SUBMITTER: Ilyushin DG 

PROVIDER: S-EPMC3557082 | biostudies-other | 2013 Jan

REPOSITORIES: biostudies-other