The role of a new drug receptor target that shows promise for the treatment of drug addiction has been recently evaluated in preclinical studies by researchers at SRI International and Astraea Therapeutics.
This potential new drug target belongs to a class of receptors called the nicotinic acetylcholine receptors (nAChRs). One subtype of nAChRs, called alpha4beta2 is a well-known target for nicotine's addictive effects and the therapeutic effect of the smoking cessation drug varenicline. SRI researchers are now studying another, lesser-known subtype, called alpha3beta4 nAChR, which has recently shown to play a role in the addictive properties of cocaine, morphine, and nicotine.
Using AT-1001, a highly selective alpha3beta4 compound developed by Astraea Therapeutics, SRI researchers found that addiction processes could be disrupted. In preliminary studies, AT-1001 also reduced nicotine withdrawal symptoms such as anxiety.
"Currently, there are no therapeutics approved to treat addiction to stimulants such as cocaine, so it is intriguing to find a promising drug receptor target and to see that AT-1001 can indeed affect phenomena that are thought to be deeply tied to the addictive nature of cocaine and other drugs of abuse," said Taline Khroyan, Ph.D., Senior Behavioral Pharmacologist in SRI's Center for Health Sciences.
Findings from these collaborative studies were recently presented at the Society for Neuroscience Annual Meeting in a study titled "AT-1001, a Highly Selective alpha3beta4 nicotinic Receptor Antagonist is Effective in Blocking Place Preference, Behavioral Sensitization, and Withdrawal Effects of Various Drugs of Abuse." The presentation was highlighted by the Society for describing the innovative approach taken by the research team.