Individuals with weak signaling in a nicotine-sensitive brain circuit were more vulnerable to nicotine dependence than those with stronger signaling, according to a study conducted while the subjects’ brains were in a resting state. A second resting-state study finds that the same circuit appears to mediate dependence associated with a genetic risk factor for smoking.
Helping smokers deal with financial problems could improve their chances of staying abstinent after receiving treatment, according to a new study. Participants with the most financial strain had the least success in remaining abstinent.
New research suggests that differences in tobacco consumption reflect, in part, differences in the functional efficacy of a specific type of receptor in a pathway of the brain. In animal studies, nicotinic acetylcholine receptors with the α5 subunit played a key role in producing aversive responses to nicotine, thereby dissuading further consumption of the drug.
Dr. Thomas Kosten of Baylor College of Medicine and Dr. Peter Burkhard of the University of Connecticut are the recipients of NIDA’s 2011 Avant-Garde Awards for Innovative Medication Development Research. Dr. Kosten is developing a vaccine against methamphetamine abuse and Dr. Burkhard is developing a vaccine to counter nicotine addiction.
Pregnant women who received financial incentives to refrain from smoking during late pregnancy were more successful at remaining abstinent and less likely to have babies with low birth weight, according to data from three trials.