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]
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Novel and Potent Dopamine D 2 Receptor Go-Protein Biased Agonists.
Featured Paper of the Month – September 2019
Published in ACS Pharmacology & Translational Science by Bonifazi, Alessandro; Yano, Hideaki; Guerrero, Adrian M; Kumar, Vivek; Hoffman, Alexander F; Lupica, Carl R; Shi, Lei; Newman, Amy Hauck
The discovery of functionally biased and physiologically beneficial ligands directed toward G-protein coupled receptors (GPCRs) has provided the impetus to design dopamine D2 receptor (D2R) targeted molecules that may be therapeutically advantageous for the treatment of certain neuropsychiatric or basal ganglia related disorders. Here we describe the synthesis of a novel series of D2R agonists linking the D2R unbiased agonist sumanirole with privileged secondary molecular fragments. The resulting ligands demonstrate improved D2R affinity and selectivity over sumanirole…
Amy Newman Wins the 2019 Ruth L. Kirschstein Mentoring Award
On July 15, 2019, Dr. Francis S. Collins presented our own Dr. Newman with the 2019 Ruth L. Kirschstein Mentoring Award. The Ruth L. Kirschstein Mentoring Award is given to individuals who have demonstrated significant leadership, skill, and ability in serving as mentor to one or more individuals. It was initiated to give formal recognition,… [Read More]
Discriminative stimuli are sufficient for incubation of cocaine craving.
Featured Paper of the Month – August 2019
Published in Elife by Madangopal, Rajtarun; Tunstall, Brendan J; Komer, Lauren E; Weber, Sophia J; Hoots, Jennifer K; Lennon, Veronica A; Bossert, Jennifer M; Epstein, David H; Shaham, Yavin; Hope, Bruce T
In abstinent drug addicts, cues formerly associated with drug-taking experiences gain relapse-inducing potency (‘incubate‘) over time. Animal models of incubation may help develop treatments to prevent relapse, but these models have ubiquitously focused on the role of conditioned stimuli (CSs) signaling drug delivery. Discriminative stimuli (DSs) are unique in that they exert stimulus-control over both drug taking and drug seeking behavior and are difficult to extinguish. For this reason, incubation of the excitatory effects of DSs that signal drug availability, not yet examined in preclinical studies, could be relevant to relapse prevention…
2020 NIDA IRP FARE winners
Congratulations to our 2020 FARE (Fellows Award for Research Excellence) winners! They will each receive a $1500 travel stipend to attend a meeting next fiscal year to present their research. They will also give a talk at the Baltimore Fellows Symposium on October 10, 2019. Congratulations to our 2020 FARE winners (left to right): Alessandro… [Read More]
Animal Models of (or for) Aggression Reward, Addiction, and Relapse: Behavior and Circuits.
Reviews To Read – July 2019. Inappropriate and pathological aggression plays a leading role in the suffering and death of millions of people, and further places an untenable strain on the caregivers and families of those afflicted. In some cases, like addictive drugs, aggression can be highly rewarding (appetitive) and continually pursued despite short- and… [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]
Nucleus Accumbens Drd1-Expressing Neurons Control Aggression Self-Administration and Aggression Seeking in Mice.
Featured Paper of the Month – July 2019
Published in The Journal of Neuroscience by Golden, Sam A; Jin, Michelle; Heins, Conor; Venniro, Marco; Michaelides, Michael; Shaham, Yavin
Aggression is often comorbid with neuropsychiatric diseases, including drug addiction. One form, appetitive aggression, exhibits symptomatology that mimics that of drug addiction and is hypothesized to be due to dysregulation of addiction-related reward circuits. However, our mechanistic understanding of the circuitry modulating appetitive operant aggression is limited…
Incubation of Cocaine Craving After Intermittent-Access Self-administration: Sex Differences and Estrous Cycle.
Featured Paper of the Month – June 2019
Published in Biological Psychiatry by Nicolas, Celine; Russell, Trinity I; Pierce, Anne F; Maldera, Steeve; Holley, Amanda; You, Zhi-Bing; McCarthy, Margaret M; Shaham, Yavin; Ikemoto, Satoshi
We examined whether binge cocaine intake has an impact on drug craving after abstinence and whether it has differential effects between male and female rats. We used an intermittent access cocaine self-administration to mimic binge intake and compare it with a continuous access self-administration. The intermittent access procedure caused stronger cocaine craving following abstinence than the continuous access procedure, and this effect was greater in female than male rats…
Christopher Blackwood selected for Society for Neuroscience Neuroscience Scholars Program
Christopher Blackwood has been selected into the Society for Neuroscience (SFN) Neuroscience Scholars Program (NSP) 2019. The two-year training program supports neuroscience trainees’ scientific and professional growth through mentoring, networking, and professional skills development and works toward the Society’s objectives of supporting the professional development of scientists from all backgrounds and increasing diversity in the… [Read More]
