# overview
I maintain several research areas within behavioral pharmacology.  My current research focus is on the interactions between feeding control systems (i.e. ghrelin) and the reinforcing actions of drugs such as cocaine and amphetamine. My research has been funded by NIDA and by corporate sponsors such as Thompson Medical Company and Knoll Pharmaceutical.

# keywords[]
Reverse Transcriptase Polymerase Chain Reaction

# keywords[]
Cyclic AMP Response Element-Binding Protein

# keywords[]
Attention Deficit Disorder With Hyperactivity

# educationAndTraining[].organization.label
Iowa State University - (Ames, Iowa, United States)

# educationAndTraining[].organization.label
Iowa State University - (Ames, Iowa, United States)

# educationAndTraining[].organization.label
California State University, Bakersfield - (Bakersfield, California, United States)

# awardsAndHonors[].label
Association of Former Students College-Level Teaching Distinguished Achievement Award, The

# publications[].label
Systemic mazindol reduces food intake in rats via suppression of meal size and meal number.

# publications[].label
Effects of dorsolateral tegmental lesions on amphetamine- and lithium-induced taste aversions.

# publications[].label
Effects of phenylpropanolamine on gastric retention in the adult rat.

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Meal patterns in male rats during and after intermittent nicotine administration.

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Social environment alters opioid-induced hyperalgesia and antinociceptive tolerance in adolescent mice.

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Decreased intake of a liquid diet in nonfood-deprived rats following intra-PVN injections of GLP-1 (7-36) amide.

# publications[].label
Attenuation of cocaine-induced locomotor sensitization in rats sustaining genetic or pharmacologic antagonism of ghrelin receptors.

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Brain and plasma levels of cocaine and benzoylecgonine in lead-expose and cadmium-exposed rats following acute or chronic intraperitoneal administration of cocaine.

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Effects of reserpine and adrenal demedullation on brown adipose tissue thermogenesis induced by dl-phenylpropanolamine.

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Effects of amphetamine and phenylpropanolamine on food intake in rats with ventromedial hypothalamic or dorsolateral tegmental damage.

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Pain reactivity in the adult rat after phentermine, dexfenfluramine, or their combination.

# publications[].label
Self-administration of phenylpropanolamine (PPA) by rats previously trained to self-administer amphetamine.

# publications[].label
Meal patterns in female rats during and after intermittent nicotine administration.

# publications[].label
Pre-exposure to flavor and conditioned taste aversion: amphetamine and lithium reinforcers.

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The effects of concurrent administration of +/-3,4-methylenedioxymethamphetamine and cocaine on conditioned place preference in the adult male rat.

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Effects on food and water intake of the alpha 1-adrenoceptor agonists amidephrine and SK&F-89748.

# publications[].label
High-fat diet meal patterns during and after continuous nicotine treatment in male rats.

# publications[].label
Differential impact of cocaine on meal patterns in female and male rats.

# publications[].label
Experimental obesity syndromes in rats: influence of diet palatability on maintenace body weights.

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Comparison of brown adipose tissue thermogenesis induced by congeners and isomers of phenylpropanolamine.

# publications[].label
Nicotine administration effects on feeding and cocaine-amphetamine-regulated transcript (CART) expression in the hypothalamus.

# publications[].label
Hyperinsulinemia and obesity in the dorsolateral tegmental rat.

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Differential effects of oxycodone, hydrocodone, and morphine on the responses of D2/D3 dopamine receptors.

# publications[].label
Effects of systemic phenylpropanolamine and fenfluramine on serotonin activity within rat paraventricular hypothalamus.

# publications[].label
Social influences on morphine conditioned place preference in adolescent mice.

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Weight loss induced by chronic phenylpropanolamine: anorexia and brown adipose tissue thermogenesis.

# publications[].label
Analgesia or addiction?: implications for morphine use after spinal cord injury.

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Burn injury decreases the antinociceptive effects of opioids.

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Self-administered cocaine causes long-lasting increases in impulsive choice in a delay discounting task.

# publications[].label
Concurrent measures of feeding and locomotion in rats.

# publications[].label
Effects of 4-hydroxyamphetamine on in vivo brown adipose tissue thermogenesis and feeding behavior in the rat.

# publications[].label
Effects of amphetamine and phenylpropanolamine on latency to feed and cumulative liquid diet intake in rats.

# publications[].label
Modulation of eating by central catecholamine systems.

# publications[].label
Effects of guanethidine sympathectomy on feeding, drinking, weight gain and amphetamine anorexia in the rat.

# publications[].label
Conditioned saccharin taste aversion induced by mycotoxins in rats: lack of effect of ochratoxin A.

# publications[].label
Interactions between caffeine and cocaine in tests of self-administration.

# publications[].label
Ghrelin and ghrelin receptor modulation of psychostimulant action.

# publications[].label
An inexpensive food cup for use in a commercially available food monitoring system.

# publications[].label
An assessment of the involvement of paraventricular hypothalamic alpha 2-adrenoceptors in phenylpropanolamine anorexia.

# publications[].label
Cadmium exposure results in decreased responsiveness to ethanol.

# publications[].label
An inexpensive guide cannula and collar for microdialysis experiments.

# publications[].label
Assessment of the role of oxytocin receptors in phenylpropanolamine-induced anorexia in rats.

# publications[].label
Brain reinforcement system function is ghrelin dependent: studies in the rat using pharmacological fMRI and intracranial self-stimulation.

# publications[].label
Effects of haloperidol on anorexia induced by l-norephedrine and d-amphetamine in adult rats.

# publications[].label
Hydrocodone, but Neither Morphine nor Oxycodone, Is Effective in Suppressing Burn-Induced Mechanical Allodynia in the Uninjured Foot Contralateral to the Burn.

# publications[].label
Inhibition of feeding and hoarding behaviors by phenylpropanolamine in the adult rat.

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Different affective response to opioid withdrawal in adolescent and adult mice.

# publications[].label
Caffeine exposure sensitizes rats to the reinforcing effects of cocaine.

# publications[].label
Nicotine's attenuation of body weight involves the perifornical hypothalamus.

# publications[].label
Modulation of feeding by hypothalamic paraventricular nucleus alpha 1- and alpha 2-adrenergic receptors.

# publications[].label
Effects of cellulose adulteration on maintenance-feeding behavior in rats with VMH lesions

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Perinatal lead exposure alters locomotion induced by amphetamine analogs in rats.

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Effects of perifornical hypothalamic microinjections of phenylpropanolamine and amphetamine on latency to feed and mash intake in rats.

# publications[].label
Influence of diet palatability on maintenance feeding behavior in rats with dorsolateral tegmental damage.

# publications[].label
Sensitization of anorexia and locomotion induced by chronic administration of ephedrine in rats.

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Diurnal rhythms of paraventricular hypothalamic norepinephrine and food intake in rats.

# publications[].label
EFFECTS OF SURGICAL REMOVAL OF INTERSCAPULAR BROWN ADIPOSE-TISSUE ON FOOD-INTAKE AND AMPHETAMINE ANOREXIA

# publications[].label
Differential Effects of Oxycodone, Hydrocodone, and Morphine on Activation Levels of Signaling Molecules.

# publications[].label
Social influences on morphine sensitization in adolescent rats.

# publications[].label
Effects on ingestive behavior in rats of the alpha 1-adrenoceptor agonist cirazoline.

# publications[].label
Diurnal variation of phenylpropanolamine anorexia in rats.

# publications[].label
Social influences on morphine sensitization in adolescent females.

# publications[].label
Differential effects of methadone and buprenorphine on the response of D2/D3 dopamine receptors in adolescent mice.

# publications[].label
Hydrocodone is More Effective than Morphine or Oxycodone in Suppressing the Development of Burn-Induced Mechanical Allodynia.

# publications[].label
Effects of paraventricular hypothalamic microinjections of phenylpropanolamine and d-amphetamine on mash intake in rats.

# publications[].label
Fluoxetine disrupts motivation and GABAergic signaling in adolescent female hamsters.

# publications[].label
Augmentation of cocaine hyperactivity in rats by systemic ghrelin.

# publications[].label
The effects of phenylpropanolamine on food intake and body weight in the genetically obese (ob/ob) mouse.

# publications[].label
Effects of acute administration of phentermine, alone or in combination with dexfenfluramine, on pain reactivity in the adult rat.

# publications[].label
Effects of the alpha 1-adrenergic agonist cirazoline on locomotion and brown adipose tissue thermogenesis in the rat.

# publications[].label
Influence of amphetamine on brown adipose thermogenesis.

# publications[].label
CONDITIONED TASTE-AVERSION AND UNCONDITIONED SUPPRESSION OF WATER-INTAKE INDUCED BY PHENYLPROPANOLAMINE IN RATS

# publications[].label
Effects of i.c.v. infusions of neuropeptide-Y (NPY) and cocaine-amphetamine-regulated-transcript (CART) on meal patterns in nicotine (N) treated rats

# publications[].label
Effects of T-2 toxin on saccharin aversion and food consumption in adult rats.

# publications[].label
Morphine-induced stereotyped thigmotaxis could appear as enhanced fear and anxiety in some behavioural tests.

# publications[].label
PVN infusion of GLP-1-(7-36) amide suppresses feeding but does not induce aversion or alter locomotion in rats.

# publications[].label
Brown adipose tissue thermogenesis induced by low level electrical stimulation of hypothalamus in rats.

# publications[].label
INFLUENCE OF DL-PHENYLPROPANOLAMINE ON BROWN ADIPOSE-TISSUE THERMOGENESIS IN THE ADULT-RAT

# publications[].label
The role of the vasopressin system and dopamine D1 receptors in the effects of social housing condition on morphine reward.

# publications[].label
Social housing conditions influence morphine dependence and the extinction of morphine place preference in adolescent mice.

# publications[].label
Effects of preexposure to dexfenfluramine, phentermine, dexfenfluramine-phentermine, or fluoxetine on sibutramine-induced hypophagia in the adult rat.

# publications[].label
ON TURNING STEREOTAXIC SURGICAL FAILURES INTO POSITIVE LEARNING-EXPERIENCES IN THE UNDERGRADUATE PHYSIOLOGICAL-PSYCHOLOGY LABORATORY

# publications[].label
Effects of intra-PVN injections of d- and l-norephedrine on feeding in rats.

# publications[].label
Augmented cocaine conditioned place preference in rats pretreated with systemic ghrelin.

# publications[].label
Inhibiting social support from massage-like stroking increases morphine dependence.

# publications[].label
Effects of nicotine on body weight, food intake and brown adipose tissue thermogenesis.

# publications[].label
Cocaine-induced hypophagia and hyperlocomotion in rats are attenuated by prazosin.

# publications[].label
The GHR-R antagonist JMV 2959 neither induces malaise nor alters the malaise property of LiCl in the adult male rat.

# publications[].label
Reversal of cirazoline- and phenylpropanolamine-induced anorexia by the alpha 1-receptor antagonist prazosin.

# publications[].label
Synergism between caffeine and dl-phenylpropanolamine on brown adipose tissue thermogenesis in the adult rat.

# publications[].label
Prenatal lead exposure enhances methamphetamine sensitization in rats.

# publications[].label
Social influences on plasma testosterone levels in morphine withdrawn adolescent mice and their drug-nave cage-mates.

# publications[].label
Impairment of acquisition of cocaine self-administration in rats maintained on a high-fat diet.

# publications[].label
Changes in mesocorticolimbic dopamine and D1/D2 receptor levels after low level lead exposure: a time course study.

# publications[].label
The pharmacology of the anorexic effect of phenylpropanolamine.

# publications[].label
Changes in feeding and locomotion induced by amphetamine analogs in rats.

# publications[].label
Suppression of feeding induced by phenylephrine microinjections within the paraventricular hypothalamus in rats.

# publications[].label
BROWN ADIPOSE-TISSUE THERMOGENESIS - A SIMPLE AND INEXPENSIVE LABORATORY EXERCISE IN PHYSIOLOGICAL-PSYCHOLOGY

# publications[].label
Effects of (-)-ephedrine on locomotion, feeding, and nucleus accumbens dopamine in rats.

# publications[].label
Morphine alters the locomotor responses to a D2/D3 dopamine receptor agonist differentially in adolescent and adult mice.

# publications[].label
Conditioned taste aversion in rats induced by the alpha 1-adrenoceptor agonist cirazoline.

# publications[].label
Regulation of bat echolocation pulse acoustics by striatal dopamine.

# publications[].label
Meal patterns and body weight after nicotine in male rats as a function of chow or high-fat diet.

# publications[].label
Augmentation of the neurochemical effects of cocaine in the ventral striatum and medial prefrontal cortex following preexposure to amphetamine, but not nicotine: an in vivo microdialysis study.

# publications[].label
Enhancement of phenylpropanolamine anorexia by proglumide in rats.

# publications[].label
Acids and quinine as dietary adulterants.

# publications[].label
Microinjection of the alpha 1-agonist methoxamine into the paraventricular hypothalamus induces anorexia in rats.

# publications[].label
Sex differences in motivational responses to dietary fat in Syrian hamsters.

# publications[].label
Pharmacologic antagonism of ghrelin receptors attenuates development of nicotine induced locomotor sensitization in rats.

# publications[].label
The role of hot plate and general environmental stimuli in morphine analgesic tolerance.

# publications[].label
The effects of chronic nicotine on meal patterns, food intake, metabolism and body weight of male rats.

# publications[].label
Systemic ghrelin sensitizes cocaine-induced hyperlocomotion in rats.

# publications[].label
Effects of ICV administration of the alpha1A-adrenoceptor antagonist 5-methylurapidil on concurrent measures of eating and locomotion after cocaine in the rat.

# publications[].label
Socially induced morphine pseudosensitization in adolescent mice.

# publications[].label
Initial characterization of mice null for Lphn3, a gene implicated in ADHD and addiction.

# publications[].label
Diurnal changes in paraventricular hypothalamic alpha1 and alpha2-adrenoceptors and food intake in rats.

# publications[].label
Amphetamine actions in dorsolateral tegmental rats: hypodipsia, anorexia, and central nervous system permeation to [14C] amphetamine.

# publications[].label
Effects of adrenalectomy and deprivation condition on food intake after phenylpropanolamine or clonidine.

# publications[].label
Intermittent nicotine administration modulates food intake in rats by acting on nicotine receptors localized to the brainstem.

# publications[].label
Effect of i.c.v. infusion of the alpha-MSH agonist MTII on meal patterns in male rats following nicotine withdrawal.

# publications[].label
INFLUENCE OF FLUID DEPRIVATION LEVEL ON THE EXTINCTION OF CONDITIONED TASTE-AVERSION INDUCED BY AMPHETAMINE IN FEMALE RATS

# publications[].label
Impact of food restriction and cocaine on locomotion in ghrelin- and ghrelin-receptor knockout mice.

# publications[].label
Effects of circadian cycle and time of testing on drug-induced anorexia in rats.

# publications[].label
Conditioned taste aversion in the adult rat induced by dietary ingestion of cadmium or cobalt.

# publications[].label
Conditioned taste reactivity in rats after phenylpropanolamine, d-amphetamine or lithium chloride.

# publications[].label
Repeated administration of ephedrine induces behavioral sensitization in rats.

# publications[].label
Norepinephrine and the control of food intake.

# publications[].label
Effects of the alpha 1a-adrenoceptor antagonist RS-17053 on phenylpropanolamine-induced anorexia in rats.

# publications[].publisher
Society for the Study of Ingestive Behavior

# publications[].label
Effects of ephedrine enantiomers on conditioned taste aversion and kaolin intake in rats.

# publications[].label
Isobolographic assessment of the effects of combinations of phenylpropanolamine and fenfluramine on food intake in rats.

# publications[].label
Effects of vomitoxin (deoxynivalenol) on conditioned saccharin aversion and food consumption in adult rats.

# publications[].label
Lobeline attenuates progressive ratio breakpoint scores for intracranial self-stimulation in rats.

# publications[].label
Sex differences in affective response to opioid withdrawal during adolescence.

# publications[].label
A review of the physiological bases of the anorexic action of phenylpropanolamine (d,1-norephedrine).

# publications[].label
Overview of methodological approaches to the study of ingestive behavior.

# publications[].label
Plasma corticosterone in the rat in response to nicotine and saline injections in a context previously paired or unpaired with nicotine.

# publications[].label
Reversal of phenylpropanolamine anorexia in rats by the alpha-1 receptor antagonist benoxathian.

# streetAddress
Texas A&M University; Psychology; 4235 TAMU

# etdChairOf[].label
Ho, Dao Hong (2005-02). Cocaine hypophagia and hyperlocomotion in rats before and after exposure to a high-fat diet. Master's Thesis.

# etdChairOf[].label
Davis, Kristina W. (2009-05). Binge-eating behavior in mice: influences of restriction and palatability in a limited access model. Doctoral Dissertation.

# etdChairOf[].label
Rocha, Angelica (2009-05). Methamphetamine self-administration in rats developmentally exposed to lead. Doctoral Dissertation.

# etdChairOf[].label
Clifford, Patrick Shane (2013-05). Impact of Ghrelin Receptor Antagonism on Nicotine and Cocaine Drug Reactivity in Rats. Doctoral Dissertation.