AZD3480, a novel nicotinic receptor agonist, for the treatment of attention-deficit/hyperactivity disorder in adults

Biol Psychiatry. 2014 Feb 1;75(3):207-14. doi: 10.1016/j.biopsych.2013.06.002. Epub 2013 Jul 12.

Abstract

Background: Laboratory studies have found that acute stimulation of nicotinic acetylcholine receptors improves cognition in adult attention-deficit/hyperactivity disorder (ADHD). Clinical trials of nicotinic agonists have been mixed, underscoring the need to understand the mechanisms for individual differences in clinical response. Using cognitive models within a clinical trial framework may provide insight into these differences.

Methods: This was a within-subjects, randomized, placebo-controlled double-blind trial of the nicotinic agonist AZD3480 (also termed TC-1734) at doses of 5 mg and 50 mg and placebo in adults with ADHD. The order of the 2-week treatment periods was randomized, and a 3-week wash out separated each drug treatment period. Response inhibition (Stop Signal Task [SST]) and clinical efficacy (Investigator Rated Conners Adult ADHD Rating Scale [CAARS-INV]) were the a priori primary outcome measures of cognitive and clinical effects. We hypothesized that AZD3480 treatment would improve SST performance and clinical symptoms (CAARS-INV Total ADHD Symptoms Score).

Results: Thirty subjects were randomized, with 24 included in the intent-to-treat analyses. SST performance and total ADHD symptoms were significantly improved with 50 mg of AZD3480. CAARS-INV ratings of inattention, memory problems, and emotional lability/impulsivity were significantly improved with 50 mg of AZD3480.

Conclusions: These results support previous work suggesting that nicotinic agonists are viable as treatments for adult ADHD. Measuring cognitive endophenotypes related to both the disorder and mechanism of treatment may help further rational drug development for dimensional features that cross-cut psychiatric disorders.

Trial registration: ClinicalTrials.gov NCT00683462.

Keywords: ADHD; AZD3480; Acetylcholine; cognition; nicotinic; therapeutic.

Publication types

  • Clinical Trial, Phase II
  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Attention Deficit Disorder with Hyperactivity / complications
  • Attention Deficit Disorder with Hyperactivity / drug therapy*
  • Cognition Disorders / drug therapy
  • Cognition Disorders / etiology
  • Dose-Response Relationship, Drug
  • Double-Blind Method
  • Female
  • Humans
  • Male
  • Middle Aged
  • Neuropsychological Tests
  • Nicotinic Agonists / therapeutic use*
  • Psychiatric Status Rating Scales
  • Pyridines / therapeutic use*
  • Young Adult

Substances

  • Nicotinic Agonists
  • Pyridines
  • ispronicline

Associated data

  • ClinicalTrials.gov/NCT00683462