Dr. Linda Dwoskin
Dr. Linda Dwoskin

Professor

Dr. Dwoskin is an Endowed Professor in Pharmaceutical Education at the University of Kentucky College of Pharmacy. She received her B.S. (1974) in psychology from Syracuse University, and Ph.D. (1983) from the Department of Pharmacology at the University of Minnesota. She was a postdoctoral fellow in endocrinology at the Oregon Health Science Center and in the Department of Pharmacology at the University of Colorado Health Science Center. Dr. Dwoskin joined the faculty at the University of Kentucky in 1988 as an assistant professor. She currently holds several other academic appointments including: professor, Department of Behavioral Sciences; adjunct faculty, University of Kentucky Graduate Center; associate, University of Kentucky Center on Drug Abuse Translation; associate, Multi-disciplinary Research Center on Drug and Alcohol Abuse; and associate, Center of Membrane Sciences. Dr. Dwoskin has been awarded the University of Kentucky Wethington Award for Meritorious Performance in Research (2002-2016). She was chosen in 2005-2006 for a University Research Professorship, recognizing her outstanding research and her distinguished record of achievement in her field. Her research has resulted in over 249 peer-reviewed research articles, 352 abstracts of research presentations and 110 patents and patent applications. Dr. Dwoskin's major research focus is drug discovery in neuropharmacology, i.e., the development of novel therapeutic candidates for the treatment of psychostimulant abuse, specifically for nicotine and methamphetamine abuse. In particular, her focus is the design and discovery of subtype-selective neuronal nicotinic receptor antagonists as novel tobacco smoking cessation agents and of modulators of vesicular monoamine transporter function as novel treatments for methamphetamine abuse. In her collaborators labs, promising therapeutic candidates are also tested in locomotor activity assays and drug discrimination assays to determine if they inhibit the stimulant effects and interoceptive cues associated with psychostimulant use, as well as in intravenous self-administration assays to determine if they inhibit the rewarding effect of these drugs of abuse. Another focus of Dr. Dwoskin's research is to determine the role of environmental and genetic factors as determinants of individual responsiveness to drugs of abuse and as determinants of an individual's potential for abuse liability. Using an animal model, the relationship between dopaminergic function (release, reuptake and metabolism) in striatum, nucleus accumbens, medial prefrontal cortex and orbital prefrontal cortex and an individual's behavior in novelty-seeking, psychostimulant self-administration and delay-discounting assays are evaluated as predictors of an individual's responsiveness to drugs of abuse. Several drugs discovered in her laboratory at the University of Kentucky are currently in various phases of clinical development. Dr. Dwoskin has graduated 1 Ph.D. student and 1 graduate students in her laboratory currently. She has trained 20 postdoctoral fellows in her laboratory.

Interests

  • My laboratory’s research focus is drug discovery in the field of neuropharmacology, specifically the development of novel treatments for psychostimulant drug abuse. Drugs within the psychostimulant class investigated include nicotine, amphetamine, methamphetamine and cocaine. Novel analogs are synthesized by our collaborators, and, their mechanism of action is elucidated in my laboratory. The ability of these novel drugs to modulate dopaminergic neuronal function is a focus as the dopaminergic system has been implicated in reward and reinforcement obtained during self-administration of drugs of abuse. Techniques employed in this regard include dopamine release, dopamine metabolism and dopamine reuptake or clearance using rodent brain slices, synaptosomes and synaptic vesicles, dopamine transporter trafficking (cellular localization), dopamine autoreceptor function, as well as heterologous modulation by other neurotransmitter receptors. Dopaminergic presynaptic terminal function in striatum, nucleus accumbens and subregions of frontal cortex is primarily studied. We also study the effects of our novel compound’s using cultured cells expressing specific neurotransmitter receptors and transporters. Whole animal models are also used to study the pharmacological effects of the psychostimulants and of the lead compounds (potential therapeutic agents) using in vivo voltammetry and microdialysis. Lead analogs from the neurochemical assays are tested to determine their effects on behavior using whole animal models, includding locomotor activity assays, specifically to determine if they block the stimulant effects of these abused drugs. Promising leads are tested using operant behavior to determine if they decrease intravenous self-administration of the stimulant drugs of abuse, reinstatement of drug seeking following extinction of self-administration, as well as their effects on measures of impulsivity including delay discounting and cued go-no go. In another important ongoing project, the role of genetic factors and environmental factors as determinants of individual responsiveness to drugs of abuse and as determinants of an individual’s potential for abuse liability are evaluated. Another important project is focused on determining if adolescents with ADHD have greater vulnerability to cocaine addiction as a consequence of treatment with stimulant and non-stimulant ADHD medications and determining the underlying neurochemical mechanism of this increased vulnerability. A more recent focus is the elucidation of the role dopamine reward mechanisms in chronic consumption of high fat diets leading to obesity and evaluation of the reversibility and prevention of the effects of high fat diets by environmental enrichment and/or exposure to a low fat diet. The latter obesity research is complemented by our previous focus on understanding presynaptic dopaminergic function and the discovery and development of lead compounds and candidate therapeutics for the treatment of drug abuse.

Recent Publications

  • Narayanaswami V, Dwoskin Linda P. (2016). Obesity: Current and potential pharmacotherapeutics and targets. Pharmacology & therapeutics,
  • Charntikov S, Falco A M, Fink K, Dwoskin Linda P, Bevins R A. (2016). The effect of sazetidine-A and other nicotinic ligands on nicotine controlled goal-tracking in female and male rats. Neuropharmacology, 113(Pt A), 354-366.
  • Shrestha S K, Kril L M, Green Keith D, Kwiatkowski S, Sviripa V M, Nickell Justin Robert, Dwoskin Linda P, Watt David S, Garneau-Tsodikova Sylvie. (2016). Bis(N-amidinohydrazones) and N-(amidino)-N'-aryl-bishydrazones: New classes of antibacterial/antifungal agents. Bioorganic & medicinal chemistry,
  • Nickell Justin Robert, Culver J P, Janganati V, Zheng Guangrong, Dwoskin Linda P, Crooks Peter A. (2016). Synthesis and in vitro evaluation of water-soluble 1,4-diphenethylpiperazine analogs as novel inhibitors of the vesicular monoamine transporter-2. Bioorganic & medicinal chemistry letters, 26(18), 4441-5.
  • Jordan C J, Lemay C, Dwoskin Linda P, Kantak K M. (2016). Adolescent d-amphetamine treatment in a rodent model of attention deficit/hyperactivity disorder: impact on cocaine abuse vulnerability in adulthood. Psychopharmacology, 233(23), 3891-3903.
  • Nickell Justin Robert, Culver J P, Janganati V, Zheng Guangrong, Dwoskin Linda P, Crooks Peter A. (2016). Synthesis and in vitro evaluation of water-soluble 1,4-diphenethylpiperazine analogs as novel inhibitors of the vesicular monoamine transporter-2. Bioorganic & medicinal chemistry letters,
  • Nickell Justin Robert, Culver J P, Janganati V, Zheng Guangrong, Dwoskin Linda P, Crooks Peter A. (2016). 1,4-Diphenalkylpiperidines: A new scaffold for the design of potent inhibitors of the vesicular monoamine transporter-2. Bioorganic & medicinal chemistry letters, 26(13), 2997-3000.
  • Kantak K M, Dwoskin Linda P. (2016). Necessity for research directed at stimulant type and treatment-onset age to access the impact of medication on drug abuse vulnerability in teenagers with ADHD. Pharmacology, biochemistry, and behavior, 145, 24-6.
  • Joolakanti S R, Nickell Justin Robert, Janganati V, Zheng Guangrong, Dwoskin Linda P, Crooks Peter A. (2016). Lobelane analogues containing 4-hydroxy and 4-(2-fluoroethoxy) aromatic substituents: Potent and selective inhibitors of [(3)H]dopamine uptake at the vesicular monoamine transporter-2. Bioorganic & medicinal chemistry letters, 26(10), 2422-7.
  • Somkuwar S S, Kantak K M, Bardo Michael, Dwoskin Linda P. (2016). Adolescent methylphenidate treatment differentially alters adult impulsivity and hyperactivity in the Spontaneously Hypertensive Rat model of ADHD. Pharmacology, biochemistry, and behavior, 141, 66-77.