A-134974 dihydrochloride hydrate

A-134974 is a novel and selective adenosine kinase (AK) inhibitor with IC₅₀ = 60 pM. Systemic A-134974 (i.p.) dose dependently reduced hyperalgesia (ED₅₀= 1 μmol/kg) and at higher doses, reduced locomotor activity (ED₅₀ = 16 μmol/kg). Administration of A-134974 intrathecally (i.t.) was more potent (ED₅₀= 6 nmol) at producing antihyperalgesia than delivering the compound by intracerebralventricular (ED₅₀ = 100 nmol, i.c.v.) or intraplantar (ED₅₀ >300 nmol) routes. In contrast, i.c.v. administration of A-134974 was more effective in reducing locomotor activity than i.t. administration (ED₅₀ values were 1 and >100 nmol, respectively). Increasing the pretreatment time for i.t.-delivered A-134974 caused a greater reduction in locomotor activity (ED₅₀= 10 nmol). This was due to diffusion of A-134974 (i.t.) to supraspinal sites. These data demonstrate that the novel AK inhibitor A-134974 potently reduces thermal hyperalgesia primarily through interactions with spinal sites, whereas its ability to depress locomotor activity is predominantly mediated by supraspinal sites.

This compound was developed by Abbott. To browse the list of other pharma-developed compounds and Approved Drugs/Drug Candidates, click here.

Sold under license from Abbott Laboratories.