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1988 …2019
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Research Output 1999 2019

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Article
2019
1 Citation (Scopus)

Roux-en-Y gastric bypass in rat reduces mu-opioid receptor levels in brain regions associated with stress and energy regulation

McGregor, M., Hamilton, J., Hajnal, A. & Thanos, P. K., Jun 1 2019, In : PloS one. 14, 6, e0218680.

Research output: Contribution to journalArticle

Open Access
bariatric surgery
Gastric Bypass
mu Opioid Receptor
narcotics
Surgery

Roux‑en‑Y gastric bypass surgery triggers rapid DNA fragmentation in vagal afferent neurons in rats

Minaya, D. M., Di Lorenzo, P. M., Hajnal, A. & Czaja, K., Jan 1 2019, In : Acta neurobiologiae experimentalis. 79, 4, p. 432-444 13 p.

Research output: Contribution to journalArticle

Afferent Neurons
Solitary Nucleus
Gastric Bypass
Microglia
DNA Fragmentation

Taste Responses in the Nucleus of the Solitary Tract of Awake Obese Rats Are Blunted Compared With Those in Lean Rats

Weiss, M. S., Hajnal, A., Czaja, K. & Di Lorenzo, P. M., Jul 30 2019, In : Frontiers in Integrative Neuroscience. 13, 35.

Research output: Contribution to journalArticle

Open Access
Solitary Nucleus
Artificial Saliva
Obesity
Taste Perception
Diet
2018
1 Citation (Scopus)

Antidepressant-like effects of insulin and IGF-1 are mediated by IGF-1 receptors in the brain

Mueller, P. L., Pritchett, C. E., Wiechman, T. N., Zharikov, A. & Hajnal, A., Oct 1 2018, In : Brain Research Bulletin. 143, p. 27-35 9 p.

Research output: Contribution to journalArticle

Somatomedin Receptors
Somatomedins
Antidepressive Agents
Insulin
Insulin Receptor
10 Citations (Scopus)

Effect of vertical sleeve gastrectomy on alcohol consumption and preferences in dietary obese rats and mice: A plausible role for altered ghrelin signaling

Orellana, E. R., Jamis, C., Horvath, N. & Hajnal, A., Apr 1 2018, In : Brain Research Bulletin. 138, p. 26-36 11 p.

Research output: Contribution to journalArticle

Obese Mice
Ghrelin
Gastrectomy
Alcohol Drinking
Ethanol
4 Citations (Scopus)

Roux-en-Y gastric bypass surgery normalizes dopamine D1, D2, and DAT levels

Hamilton, J., Swenson, S., Hajnal, A. & Thanos, P. K., Oct 2018, In : Synapse. 72, 10, e22058.

Research output: Contribution to journalArticle

Dopamine Plasma Membrane Transport Proteins
Gastric Bypass
Dopamine
High Fat Diet
Nucleus Accumbens
6 Citations (Scopus)

Taste and odor preferences following roux-en-Y surgery in humans

Kittrell, H., Graber, W., Mariani, E., Czaja, K., Hajnal, A. & Di Lorenzo, P. M., Jul 2018, In : PloS one. 13, 7, e0199508.

Research output: Contribution to journalArticle

bariatric surgery
Odors
Surgery
Bariatric Surgery
surgery
2017
62 Citations (Scopus)

Diet-driven microbiota dysbiosis is associated with vagal remodeling and obesity

Sen, T., Cawthon, C. R., Ihde, B. T., Hajnal, A., DiLorenzo, P. M., de La Serre, C. B. & Czaja, K., May 1 2017, In : Physiology and Behavior. 173, p. 305-317 13 p.

Research output: Contribution to journalArticle

Dysbiosis
Microbiota
High Fat Diet
Obesity
Diet
40 Citations (Scopus)

Energy-dense diet triggers changes in gut microbiota, reorganization of gut-brain vagal communication and increases body fat accumulation

Vaughn, A. C., Cooper, E. M., Dilorenzo, P. M., O’Loughlin, L. J., Konkel, M. E., Peters, J. H., Hajnal, A., Sen, T., Lee, S. H., de La Serre, C. B. & Czaja, K., Jan 1 2017, In : Acta Neurobiologiae Experimentalis. 77, 1, p. 18-30 13 p.

Research output: Contribution to journalArticle

Adipose Tissue
Microglia
Communication
Minocycline
Diet
2016
12 Citations (Scopus)
Gastric Bypass
Reward
Magnetic Resonance Imaging
Brain
Weight Loss
9 Citations (Scopus)

Increased intravenous morphine self-administration following Roux-en-Y gastric bypass in dietary obese rats

Biegler, J. M., Freet, C., Horvath, N., Rogers, A. & Hajnal, A., May 1 2016, In : Brain Research Bulletin. 123, p. 47-52 6 p.

Research output: Contribution to journalArticle

Self Administration
Gastric Bypass
Morphine
Opioid Analgesics
Bariatric Surgery
2015
3 Citations (Scopus)

Acute metabolic effects of olanzapine depend on dose and injection site

Klingerman, C. M., Stipanovic, M. E., Hajnal, A. & Lynch, C. J., Nov 29 2015, In : Dose-Response. 13, 4

Research output: Contribution to journalArticle

olanzapine
Glucose
Rats
Blood
Injections
8 Citations (Scopus)

Low expression of D2R and wntless correlates with high motivation for heroin

Tacelosky, D. M., Alexander, D. N., Morse, M., Hajnal, A., Berg, A., Levenson, R. & Grigson-Kennedy, P. S., Dec 1 2015, In : Behavioral Neuroscience. 129, 6, p. 744-755 12 p.

Research output: Contribution to journalArticle

Heroin
Motivation
Opioid Analgesics
Pharmaceutical Preparations
Drug Overdose
6 Citations (Scopus)

RNA sequencing reveals a slow to fast muscle fiber type transition after olanzapine infusion in rats

Lynch, C. J., Xu, Y., Hajnal, A., Salzberg, A. C. & Kawasawa, Y. I., Apr 20 2015, In : PloS one. 10, 4, e0123966.

Research output: Contribution to journalArticle

olanzapine
RNA Sequence Analysis
muscle fibers
Muscle
Rats
15 Citations (Scopus)

Roux-en-Y gastric bypass alters brain activity in regions that underlie reward and taste perception

Thanos, P. K., Michaelides, M., Subrize, M., Miller, M. L., Bellezza, R., Cooney, R. N., Leggio, L., Wang, G. J., Rogers, A. M., Volkow, N. D. & Hajnal, A., Jun 3 2015, In : PloS one. 10, 6, e0125570.

Research output: Contribution to journalArticle

Taste Perception
bariatric surgery
Gastric Bypass
Reward
Brain
31 Citations (Scopus)

Sleeve gastrectomy and roux-en-y gastric bypass alter the gut-brain communication

Ballsmider, L. A., Vaughn, A. C., David, M., Hajnal, A., Di Lorenzo, P. M. & Czaja, K., 2015, In : Neural Plasticity. 2015, 601985.

Research output: Contribution to journalArticle

Gastric Bypass
Gastrectomy
Communication
Nodose Ganglion
Brain
7 Citations (Scopus)

The role of catecholamine innervation in the medial prefrontal cortex on the regulation of body weight and food intake

Gálosi, R., Hajnal, A., Petykó, Z., Hartmann, G., Karádi, Z. & Lénárd, L., Jun 1 2015, In : Behavioural Brain Research. 286, p. 318-327 10 p.

Research output: Contribution to journalArticle

Prefrontal Cortex
Catecholamines
Norepinephrine
Eating
Body Weight
2014
13 Citations (Scopus)

Alloisoleucine differentiates the branched-chain aminoacidemia of Zucker and dietary obese rats

Olson, K. C., Chen, G., Xu, Y., Hajnal, A. & Lynch, C. J., May 2014, In : Obesity. 22, 5, p. 1212-1215 4 p.

Research output: Contribution to journalArticle

3-Methyl-2-Oxobutanoate Dehydrogenase (Lipoamide)
Isoleucine
Branched Chain Amino Acids
Obesity
Zucker Rats
2013
5 Citations (Scopus)

Cocaine- and amphetamine-regulated transcript (CART) peptide immunoreactivity in feeding- and reward-related brain areas of young OLETF rats

Armbruszt, S., Abraham, H., Figler, M., Kozicz, T. & Hajnal, A., May 1 2013, In : Journal of Chemical Neuroanatomy. 50-51, 1, p. 75-84 10 p.

Research output: Contribution to journalArticle

Inbred OLETF Rats
Amphetamine
Reward
Cocaine
Peptides
12 Citations (Scopus)

Improvement in hepatic insulin sensitivity after Roux-en-Y gastric bypass in a rat model of obesity is partially mediated via hypothalamic insulin action

Paranjape, S. A., Chan, O., Zhu, W., Acharya, N. K., Rogers, A. M., Hajnal, A. & Sherwin, R. S., Sep 1 2013, In : Diabetologia. 56, 9, p. 2055-2058 4 p.

Research output: Contribution to journalArticle

Gastric Bypass
Insulin Resistance
Obesity
Insulin
Liver
25 Citations (Scopus)

Roux-en-Y gastric bypass increases intravenous ethanol self-administration in dietary obese rats

Polston, J. E., Pritchett, C. E., Tomasko, J. M., Rogers, A. M., Leggio, L., Thanos, P. K., Volkow, N. D. & Hajnal, A., Dec 31 2013, In : PloS one. 8, 12, e83741.

Research output: Contribution to journalArticle

bariatric surgery
Self Administration
Gastric Bypass
Surgery
Rats
41 Citations (Scopus)

Roux-en-Y gastric bypass reverses the effects of diet-induced obesity to inhibit the responsiveness of central vagal motoneurones

Browning, K., Fortna, S. R. & Hajnal, A., May 1 2013, In : Journal of Physiology. 591, 9, p. 2357-2372 16 p.

Research output: Contribution to journalArticle

Gastric Bypass
Motor Neurons
Obesity
Diet
Neurons
2012
40 Citations (Scopus)

Alcohol Reward Is Increased after Roux-en-Y Gastric Bypass in Dietary Obese Rats with Differential Effects following Ghrelin Antagonism

Hajnal, A., Zharikov, A., Polston, J. E., Fields, M. R., Tomasko, J., Rogers, A. M., Volkow, N. D. & Thanos, P. K., Nov 7 2012, In : PloS one. 7, 11, e49121.

Research output: Contribution to journalArticle

bariatric surgery
ghrelin
Ghrelin
Gastric Bypass
Reward
36 Citations (Scopus)

Gastric bypass increases ethanol and water consumption in diet-induced obese rats

Thanos, P. K., Subrize, M., Delis, F., Cooney, R. N., Culnan, D., Sun, M., Wang, G. J., Volkow, N. D. & Hajnal, A., Jan 1 2012, In : Obesity Surgery. 22, 12, p. 1884-1892 9 p.

Research output: Contribution to journalArticle

Gastric Bypass
Drinking
Ethanol
Diet
Alcohols
9 Citations (Scopus)

Glucagon-like peptide-1 regulation of carbohydrate intake is differentially affected by obesogenic diets

Pritchett, C. E. & Hajnal, A., Feb 1 2012, In : Obesity. 20, 2, p. 313-317 5 p.

Research output: Contribution to journalArticle

Glucagon-Like Peptide 1
Carbohydrates
Diet
Dietary Fats
Fructose
52 Citations (Scopus)

Transformation of postingestive glucose responses after deletion of sweet taste receptor subunits or gastric bypass surgery

Geraedts, M. C. P., Takahashi, T., Vigues, S., Markwardt, M. L., Nkobena, A., Cockerham, R. E., Hajnal, A., Dotson, C. D., Rizzo, M. A. & Munger, S. D., Jan 1 2012, In : American Journal of Physiology - Endocrinology and Metabolism. 303, 4, p. E464-E474

Research output: Contribution to journalArticle

Gastric Bypass
Glucagon-Like Peptide 1
Glucose
Large Intestine
KATP Channels
2011
38 Citations (Scopus)

Could the mechanisms of bariatric surgery hold the key for novel therapies? Report from a Pennington Scientific Symposium

Tam, C. S., Berthoud, H. R., Bueter, M., Chakravarthy, M. V., Geliebter, A., Hajnal, A., Holst, J., Kaplan, L., Pories, W., Raybould, H., Seeley, R., Strader, A. & Ravussin, E., Nov 1 2011, In : Obesity Reviews. 12, 11, p. 984-994 11 p.

Research output: Contribution to journalArticle

Bariatric Surgery
Energy Metabolism
Food Preferences
Magic
Pleasure
20 Citations (Scopus)

Obesogenic diets may differentially alter dopamine control of sucrose and fructose intake in rats

Pritchett, C. E. & Hajnal, A., Jul 25 2011, In : Physiology and Behavior. 104, 1, p. 111-116 6 p.

Research output: Contribution to journalArticle

Fructose
Sucrose
Dopamine
Diet
Raclopride
2010
11 Citations (Scopus)

Altered orosensory sensitivity to oils in CCK-1 receptor deficient rats

Swartz, T. D., Hajnal, A. & Covasa, M., Jan 12 2010, In : Physiology and Behavior. 99, 1, p. 109-117 9 p.

Research output: Contribution to journalArticle

Inbred OLETF Rats
Cholecystokinin A Receptor
Oils
Corn Oil
Bottle Feeding
73 Citations (Scopus)

Gastric bypass surgery alters behavioral and neural taste functions for sweet taste in obese rats

Hajnal, A., Kovacs, P., Ahmed, T., Meirelles, K., Lynch, C. J. & Cooney, R. N., Oct 1 2010, In : American Journal of Physiology - Gastrointestinal and Liver Physiology. 299, 4, p. G967-G979

Research output: Contribution to journalArticle

Gastric Bypass
Inbred OLETF Rats
Cholecystokinin A Receptor
Sucrose
Obesity
2009
10 Citations (Scopus)

Cocaine- and amphetamine-regulated transcript peptide immunoreactivity in the brain of the CCK-1 receptor deficient obese OLETF rat

Abraham, H., Covasa, M. & Hajnal, A., Jul 1 2009, In : Experimental Brain Research. 196, 4, p. 545-556 12 p.

Research output: Contribution to journalArticle

Inbred OLETF Rats
Cholecystokinin A Receptor
Amphetamine
Cocaine
Peptides
21 Citations (Scopus)

In vivo electrophysiological effects of insulin in the rat brain

Kovacs, P. & Hajnal, A., Aug 1 2009, In : Neuropeptides. 43, 4, p. 283-293 11 p.

Research output: Contribution to journalArticle

Insulin
Brain
gamma-Aminobutyric Acid
Neurons
Insulin Receptor
2008
32 Citations (Scopus)

Altered dopamine D2 receptor function and binding in obese OLETF rat

Hajnal, A., Margas, W. M. & Covasa, M., Jan 31 2008, In : Brain Research Bulletin. 75, 1, p. 70-76 7 p.

Research output: Contribution to journalArticle

Inbred OLETF Rats
Dopamine D2 Receptors
Quinpirole
Sucrose
Obesity
16 Citations (Scopus)

Altered pontine taste processing in a rat model of obesity

Kovacs, P. & Hajnal, A., Oct 1 2008, In : Journal of neurophysiology. 100, 4, p. 2145-2157 13 p.

Research output: Contribution to journalArticle

Dysgeusia
Sucrose
Obesity
Inbred OLETF Rats
Neurons
2007
26 Citations (Scopus)
Inbred OLETF Rats
Dopamine
Cholecystokinin A Receptor
Obesity
Corpus Striatum
10 Citations (Scopus)

Conditioned preference for sweet stimuli in OLETF rat: Effects of food deprivation

De Jonghe, B. C., Hajnal, A. & Covasa, M., May 1 2007, In : American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 292, 5, p. R1819-R1827

Research output: Contribution to journalArticle

Inbred OLETF Rats
Food Deprivation
Sucrose
Saccharin
Cholecystokinin A Receptor
226 Citations (Scopus)

Disruption of BCATm in Mice Leads to Increased Energy Expenditure Associated with the Activation of a Futile Protein Turnover Cycle

She, P., Reid, T. M., Bronson, S. K., Vary, T. C., Hajnal, A., Lynch, C. J. & Hutson, S. M., Sep 5 2007, In : Cell Metabolism. 6, 3, p. 181-194 14 p.

Research output: Contribution to journalArticle

Branched Chain Amino Acids
Energy Metabolism
Leucine
Food
Proteins
20 Citations (Scopus)

Dopamine D2 receptors contribute to increased avidity for sucrose in obese rats lacking CCK-1 receptors

Hajnal, A., De Jonghe, B. C. & Covasa, M., Aug 24 2007, In : Neuroscience. 148, 2, p. 584-592 9 p.

Research output: Contribution to journalArticle

Cholecystokinin Receptors
Dopamine D2 Receptors
Sucrose
Inbred OLETF Rats
Raclopride
34 Citations (Scopus)
Inbred OLETF Rats
Sucrose
Raclopride
Reinforcement Schedule
Reward
40 Citations (Scopus)
Saccharin
Morphine
Dopamine
Cues
Nucleus Accumbens
2006
21 Citations (Scopus)

Acute methylphenidate treatments reduce sucrose intake in restricted-fed bingeing rats

Bello, N. T. & Hajnal, A., Oct 16 2006, In : Brain Research Bulletin. 70, 4-6, p. 422-429 8 p.

Research output: Contribution to journalArticle

Methylphenidate
Sucrose
Bulimia
Therapeutics
Eating
26 Citations (Scopus)

Alterations in blood glucose levels under hyperinsulinemia affect accumbens dopamine

Bello, N. T. & Hajnal, A., Jun 15 2006, In : Physiology and Behavior. 88, 1-2, p. 138-145 8 p.

Research output: Contribution to journalArticle

Hyperinsulinism
Blood Glucose
Dopamine
Insulin
Homovanillic Acid
5 Citations (Scopus)
Inbred OLETF Rats
Cholecystokinin A Receptor
Gastric Emptying
Stomach
Meals
115 Citations (Scopus)

Gustatory reward and the nucleus accumbens

Norgren, R., Hajnal, A. & Mungarndee, S. S., Nov 30 2006, In : Physiology and Behavior. 89, 4, p. 531-535 5 p.

Research output: Contribution to journalArticle

Nucleus Accumbens
Reward
Dopamine
Neurochemistry
Neuroanatomy
115 Citations (Scopus)

Hormonal and metabolic effects of olanzapine and clozapine related to body weight in rodents

Albaugh, V. L., Henry, C. R., Bello, N. T., Hajnal, A., Lynch, S. L., Halle, B. & Lynch, C. J., Jan 1 2006, In : Obesity. 14, 1, p. 36-51 16 p.

Research output: Contribution to journalArticle

olanzapine
Clozapine
Rodentia
Leptin
Body Weight
129 Citations (Scopus)

Sham feeding corn oil increases accumbens dopamine in the rat

Liang, N. C., Hajnal, A. & Norgren, R., Nov 24 2006, In : American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 291, 5, p. R1236-R1239

Research output: Contribution to journalArticle

Corn Oil
Nucleus Accumbens
Dopamine
Sucrose
Gastric Fistula
2005
47 Citations (Scopus)

Altered taste sensitivity in obese, prediabetic OLETF rats lacking CCK-1 receptors

Hajnal, A., Covasa, M. & Bello, N. T., Dec 1 2005, In : American Journal of Physiology - Regulatory Integrative and Comparative Physiology. 289, 6 58-6, p. R1675-R1686

Research output: Contribution to journalArticle

Dysgeusia
Inbred OLETF Rats
Cholecystokinin A Receptor
Prediabetic State
Sucrose
7 Citations (Scopus)

Brief intermittent access to sucrose differentially modulates prepulse inhibition and acoustic startle response in obese CCK-1 receptor deficient rats

De Jonghe, B. C., Di Martino, C., Hajnal, A. & Covasa, M., Aug 2 2005, In : Brain research. 1052, 1, p. 22-27 6 p.

Research output: Contribution to journalArticle

Startle Reflex
Inbred OLETF Rats
Cholecystokinin A Receptor
Acoustics
Sucrose
48 Citations (Scopus)
Inbred OLETF Rats
Cholecystokinin A Receptor
Sucrose
Bottle Feeding
Hyperphagia
23 Citations (Scopus)

Male rats show an indifference-avoidance response for increasing concentrations of the artificial sweetener sucralose

Bello, N. T. & Hajnal, A., Jul 1 2005, In : Nutrition Research. 25, 7, p. 693-699 7 p.

Research output: Contribution to journalArticle

trichlorosucrose
Sweetening Agents
Water
Sprague Dawley Rats
Sucrose