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National Institute on Drug Abuse - Intramural Research Program

  National Institute on Drug Abuse | NIH IRP | Treatment Information
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    • Featured Paper of the Month
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    • About NIDA IRP
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    • Careers at NIDA IRP
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Featured Paper of the Month

Time-Varying Functional Connectivity Decreases as a Function of Acute Nicotine Abstinence

A portion of a figure from this study

Featured Paper of the Month – April 2021 Published in Biological Psychiatry: Cognitive Neuroscience and Neuroimaging by  John Fedota, Ph.D. and Thomas Ross, Ph.D.,  et al. in the NIDA IRP Cognitive and Affective Neuroscience of Addiction Section. Summary Quitting smoking is hard. This is largely due to the nicotine withdrawal syndrome. Withdrawal from cigarettes is… [Read More]

Dissecting the Role of GABA Neurons in the VTA versus SNr in Opioid Reward

Featured Paper of the Month – March 2021 Published in The Journal of Neuroscience by  Ewa Galaj, Ph.D. Ph.D. and Zheng-Xiong Xi, M.D., Ph.D.,  et al. in the NIDA IRP Addiction Biology Unit. Summary Opioid reward has long been believed to be mediated by inhibition of VTA GABA interneurons that disinhibits DA neurons. In this… [Read More]

Novel Fluorescent Ligands Enable Single-Molecule Localization Microscopy of the Dopamine Transporter

A portion of a figure from this study

Featured Paper of the Month – February 2021 The dopamine transporter (DAT) functions to control dopaminergic neurotransmission and is a target for therapeutic agents, including ADHD medications, as well as abused substances, such as cocaine. Here, we develop new fluorescently labeled ligands as promising new tools for studying DAT localization and regulation with single-molecule resolution…. [Read More]

Compulsive methamphetamine taking induces autophagic and apoptotic markers in the rat dorsal striatum

A portion of a figure from this study.

Featured Paper of the Month – January 2021 The use of  methamphetamine (METH) is very prevalent throughout the world. METH can cause anxiety, psychosis, seizures, and death. Previous research in the Cadet Lab has shown that METH can cause neurodegeneration when the drug is injected by investigators.  It was therefore important to find out if… [Read More]

Exception That Proves the Rule: Investigation of Privileged Stereochemistry in Designing Dopamine D3R Bitopic Agonists

Study Author Francisco Battiti

Featured Paper of the Month – December 2020 In this study, starting from our highly selective and potent D3R agonist 5 , we further investigated the chemical space around the linker portion of the molecule, via insertion of a hydroxyl substituent and ring-expansion of the trans cyclopropyl moiety into a trans -cyclohexyl scaffold. Moreover, inspired… [Read More]

Positive Allosteric Modulation of the 5-HT1A Receptor by Indole-Based Synthetic Cannabinoids Abused by Humans

Hideaki Yano, Ph.D.

Featured Paper of the Month – November 2020. The nonmedical (i.e., recreational) misuse of synthetic cannabinoids (SCs) is a worldwide public health problem. When compared to cannabis, the misuse of SCs is associated with a higher incidence of serious adverse effects, suggesting the possible involvement of noncannabinoid sites of action. Here, we find that, unlike… [Read More]

Modafinil potentiates cocaine self-administration by a dopamine-independent mechanism: possible involvement of gap junctions

Featured Paper of the Month – October 2020. Modafinil and methylphenidate are clinically available medications that inhibit the reuptake of dopamine in neurons, a common mechanism with psychostimulants like cocaine. We investigated the reinforcing actions of modafinil or methylphenidate alone and in combination with cocaine, in rats. While rats did not self-administer modafinil, suggesting low… [Read More]

The mechanism of a high-affinity allosteric inhibitor of the serotonin transporter

A figure from this study

Featured Paper of the Month – September 2020. The serotonin transporter (SERT) terminates serotonin signaling by rapid presynaptic reuptake. SERT activity is modulated by antidepressants, e.g., S-citalopram and imipramine, to alleviate symptoms of depression and anxiety. SERT crystal structures reveal two S-citalopram binding pockets in the central binding (S1) site and the extracellular vestibule (S2… [Read More]

Role of Projections between Piriform Cortex and Orbitofrontal Cortex in Relapse to Fentanyl Seeking after Palatable Food Choice-Induced Voluntary Abstinence

Study Coauthors Olivia Lofaro and Sarah Applebey

Featured Paper of the Month – August 2020. Fentanyl is a major contributor to the opioid overdose crisis, but there are few preclinical studies of fentanyl relapse. These studies have used experimenter-imposed extinction or forced abstinence procedures. In humans, however, abstinence is often voluntary, with drug available in the drug environment but forgone in favor… [Read More]

Intrinsic differences in insular circuits moderate the negative association between nicotine dependence and cingulate-striatal connectivity strength

Study Authors

Featured Paper of the Month – July 2020. Developing brain-based biomarkers to assess drug dependence, including nicotine dependence, are essential to assess and improve the current, marginally effective, treatments. In humans, using brain-based resting state functional connectivity, we have previously identified a circuit between the dorsal anterior cingulate cortex(ACC) and the striatum whose connectivity decreased… [Read More]

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