Hot Off the Press – March 27 , 2020. The current study offers a mechanistic explanation for the protective effect of social interaction on incubation of craving in rodents, showing that it is mediated by the activation of neurons expressing the enzyme PKCδ the brain’s amygdala. The study also shows that activation of a peptide… [Read More]
Hot off the Press
Operant Social Reward Decreases Incubation of Heroin Craving in Male and Female Rats.
Hot Off the Press – December 18 , 2019. We recently developed a rat model of relapse after voluntary abstinence from methamphetamine self-administration that is based on behavioral treatments in humans with substance use problems. In the present study, we extend this work to heroin self-administration, demonstrating that when rats are given the opportunity to… [Read More]
Habenular and striatal activity during performance feedback are differentially linked with state-like and trait-like aspects of tobacco use disorder.
Hot Off the Press – October 28, 2019. Approximately 1.1 billion people smoke cigarettes worldwide. More than half of these are expected to die of smoking-related diseases. According to the US Centers for Disease Control: most smokers (68%) want to quit; about half (54%) try to quit each year; yet very few (about 7%) do… [Read More]
Altered corticolimbic control of the nucleus accumbens by chronic Δ9-Tetrahydrocannabinol Exposure
Hot Off the Press – September 3, 2019. The expanding legalization of recreational and medical marijuana has increased its availability, and stronger strains of cannabis containing much higher levels of ∆9-tetrahydrocannabinol (THC), the primary psychoactive constituent, are now widely used. Although the effects of marijuana on the brain are often assumed to be mild, there… [Read More]
High-Frequency Activation of Nucleus Accumbens D1-MSNs Drives Excitatory Potentiation on D2-MSNs.
Hot Off the Press – June 16, 2019. Brain stimulation is used to treat reward-related psychiatric diseases including addiction and treatment resistant depression. We report that high frequency stimulation parameters effective in treating these diseases promote the release of the peptide substance P. Release of this peptide in the Nucleus Accumbens rebalances excitatory input to… [Read More]
Neuron-Specific Genome Modification in the Adult Rat Brain Using CRISPR-Cas9 Transgenic Rats.
Hot Off the Press – May 10, 2019. Cell-specific CRISPR/Cas9 in the adult rat brain. Microscopic images of the midbrain of a transgenic rat that selectively expresses Cas9 in dopamine neurons. On the left side, control gRNAs were delivered to cells in the midbrain using a virus (green). On the right side, gRNAs to a… [Read More]
Compulsive drug use is associated with imbalance of orbitofrontal- and prelimbic-striatal circuits in punishment-resistant individuals
Hot Off the Press – May 6, 2019. We report that in a methamphetamine self-administration experiment, all rats show changes in the balance between “go” and “stop” brain circuits, however after foot shock punishment, behavior in the addictive subgroup is strongly correlated with the change in the balance of “go” and “stop” circuits, while the… [Read More]
Oxytocin blocks enhanced motivation for alcohol in alcohol dependence and blocks alcohol effects on GABAergic transmission in the central amygdala.
Hot Off the Press – April 22, 2019. The neuropeptide oxytocin blocks enhanced drinking in alcohol-dependent rats, according to a study published April 16 in the open-access journal PLOS Biology led by Drs. Tunstall, Koob and Vendruscolo of the National Institutes of Health, and Drs. Kirson and Roberto of The Scripps Research Institute. Targeting the… [Read More]
Ultrapotent chemogenetics for research and potential clinical applications.
Hot Off the Press – April 12, 2019. NIDA-funded scientists have just published findings in the journal Science showing the development of a new, groundbreaking chemogenetics technology for modulating brain function in a remote, precise and ultra-sensitive manner in living subjects. These findings describe new chemogenetic ion channels for neuron activation and silencing that are controlled by… [Read More]
Heroin addiction engages negative emotional learning brain circuits in rats
Hot Off the Press – April 8, 2019. The United States is amid an unprecedented opioid epidemic. From 2002 through 2016, the number of heroin users increased by 135% and the number of deaths attributable to heroin increased by 533%. Therefore, there is an urgent need for research into the neurobiology of opioid use disorder… [Read More]
