Andras Hajnal - Publications

Affiliations: 
Pennsylvania State University College of Medicine, Hershey, PA, United States 
Area:
Dopamine, reward, sweet taste, eating, obesity, gastric bypass

81 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2019 Orellana ER, Covasa M, Hajnal A. Neuro-hormonal mechanisms underlying changes in reward related behaviors following weight loss surgery: Potential pharmacological targets. Biochemical Pharmacology. 164: 106-114. PMID 30954487 DOI: 10.1016/j.bcp.2019.04.004  0.68
2018 Mueller PL, Pritchett CE, Wiechman TN, Zharikov A, Hajnal A. Antidepressant-like Effects of Insulin and IGF-1 are Mediated by IGF-1 Receptors in the Brain. Brain Research Bulletin. PMID 30278200 DOI: 10.1016/j.brainresbull.2018.09.017  1
2015 Klingerman CM, Stipanovic ME, Hajnal A, Lynch CJ. Acute Metabolic Effects of Olanzapine Depend on Dose and Injection Site. Dose-Response : a Publication of International Hormesis Society. 13: 1559325815618915. PMID 26740814 DOI: 10.1177/1559325815618915  1
2015 Tacelosky DM, Alexander DN, Morse M, Hajnal A, Berg A, Levenson R, Grigson PS. Low Expression of D2R and Wntless Correlates With High Motivation for Heroin. Behavioral Neuroscience. PMID 26501177 DOI: 10.1037/bne0000104  1
2015 Wang JL, Yang Q, Hajnal A, Rogers AM. A pilot functional MRI study in Roux-en-Y gastric bypass patients to study alteration in taste functions after surgery. Surgical Endoscopy. PMID 26099619 DOI: 10.1007/s00464-015-4288-5  1
2015 Thanos PK, Michaelides M, Subrize M, Miller ML, Bellezza R, Cooney RN, Leggio L, Wang GJ, Rogers AM, Volkow ND, Hajnal A. Roux-en-Y Gastric Bypass Alters Brain Activity in Regions that Underlie Reward and Taste Perception. Plos One. 10: e0125570. PMID 26039080 DOI: 10.1371/journal.pone.0125570  1
2015 Lynch CJ, Xu Y, Hajnal A, Salzberg AC, Kawasawa YI. RNA sequencing reveals a slow to fast muscle fiber type transition after olanzapine infusion in rats. Plos One. 10: e0123966. PMID 25893406 DOI: 10.1371/journal.pone.0123966  1
2015 Gálosi R, Hajnal A, Petykó Z, Hartmann G, Karádi Z, Lénárd L. The role of catecholamine innervation in the medial prefrontal cortex on the regulation of body weight and food intake. Behavioural Brain Research. 286: 318-27. PMID 25783808 DOI: 10.1016/j.bbr.2015.03.017  1
2015 Ballsmider LA, Vaughn AC, David M, Hajnal A, Di Lorenzo PM, Czaja K. Sleeve gastrectomy and Roux-en-Y gastric bypass alter the gut-brain communication. Neural Plasticity. 2015: 601985. PMID 25722893 DOI: 10.1155/2015/601985  1
2015 Biegler JM, Freet CS, Horvath N, Rogers AM, Hajnal A. Increased intravenous morphine self-administration following Roux-en-Y gastric bypass in dietary obese rats Brain Research Bulletin. DOI: 10.1016/j.brainresbull.2015.08.003  1
2014 Hajnal A, Tényi T, Varga E, Simon M, Halmai T, Németh N, Fekete S, Trixler D, Herold R. [Social cognitive differences in first-degree relatives of patients with schizophrenia. A systematic review]. Psychiatria Hungarica : a Magyar PszichiáTriai TáRsasáG TudomáNyos FolyóIrata. 29: 301-7. PMID 25411226  1
2014 Tényi T, Hajnal A, Halmai T, Herold R, Simon M, Trixler D, Varga E, Fekete S, Csábi G. [Minor physical anomalies in the relatives of schizophrenia patients. A systematic review of the literature]. Psychiatria Hungarica : a Magyar PszichiáTriai TáRsasáG TudomáNyos FolyóIrata. 29: 208-13. PMID 25041748  1
2014 Olson KC, Chen G, Xu Y, Hajnal A, Lynch CJ. Alloisoleucine differentiates the branched-chain aminoacidemia of Zucker and dietary obese rats. Obesity (Silver Spring, Md.). 22: 1212-5. PMID 24415721 DOI: 10.1002/oby.20691  1
2014 Browning KN, Hajnal A. The effects of bariatric surgery: will understanding its mechanism render the knife unnecessary? Expert Review of Gastroenterology & Hepatology. 8: 1-4. PMID 24410467 DOI: 10.1586/17474124.2014.846214  1
2013 Polston JE, Pritchett CE, Tomasko JM, Rogers AM, Leggio L, Thanos PK, Volkow ND, Hajnal A. Roux-en-Y gastric bypass increases intravenous ethanol self-administration in dietary obese rats. Plos One. 8: e83741. PMID 24391816 DOI: 10.1371/journal.pone.0083741  1
2013 Paranjape SA, Chan O, Zhu W, Acharya NK, Rogers AM, Hajnal A, Sherwin RS. Improvement in hepatic insulin sensitivity after Roux-en-Y gastric bypass in a rat model of obesity is partially mediated via hypothalamic insulin action. Diabetologia. 56: 2055-8. PMID 23783353 DOI: 10.1007/s00125-013-2952-7  1
2013 Hajnal A, Thanos PK, Volkow ND. Notes on "roux en y gastric bypass increases ethanol intake in the rat" by Davis et al. Obesity Surgery. 23: 1317. PMID 23649870 DOI: 10.1007/s11695-013-0961-8  1
2013 Armbruszt S, Abraham H, Figler M, Kozicz T, Hajnal A. Cocaine- and amphetamine-regulated transcript (CART) peptide immunoreactivity in feeding- and reward-related brain areas of young OLETF rats. Journal of Chemical Neuroanatomy. 50: 75-84. PMID 23545074 DOI: 10.1016/j.jchemneu.2013.03.003  1
2013 Browning KN, Fortna SR, Hajnal A. Roux-en-Y gastric bypass reverses the effects of diet-induced obesity to inhibit the responsiveness of central vagal motoneurones. The Journal of Physiology. 591: 2357-72. PMID 23459752 DOI: 10.1113/jphysiol.2012.249268  1
2012 Hajnal A, Zharikov A, Polston JE, Fields MR, Tomasko J, Rogers AM, Volkow ND, Thanos PK. Alcohol reward is increased after Roux-en-Y gastric bypass in dietary obese rats with differential effects following ghrelin antagonism. Plos One. 7: e49121. PMID 23145091 DOI: 10.1371/journal.pone.0049121  1
2012 Thanos PK, Subrize M, Delis F, Cooney RN, Culnan D, Sun M, Wang GJ, Volkow ND, Hajnal A. Gastric bypass increases ethanol and water consumption in diet-induced obese rats. Obesity Surgery. 22: 1884-92. PMID 22976430 DOI: 10.1007/s11695-012-0749-2  1
2012 Geraedts MC, Takahashi T, Vigues S, Markwardt ML, Nkobena A, Cockerham RE, Hajnal A, Dotson CD, Rizzo MA, Munger SD. Transformation of postingestive glucose responses after deletion of sweet taste receptor subunits or gastric bypass surgery. American Journal of Physiology. Endocrinology and Metabolism. 303: E464-74. PMID 22669246 DOI: 10.1152/ajpendo.00163.2012  1
2012 Pritchett CE, Hajnal A. Glucagon-like peptide-1 regulation of carbohydrate intake is differentially affected by obesogenic diets. Obesity (Silver Spring, Md.). 20: 313-7. PMID 22134200 DOI: 10.1038/oby.2011.342  1
2011 Simon M, Varga E, Hajnal A, Schnell Z, Tényi T, Fekete S, Herold R. Theory of mind deficits in euthymic patients with bipolar I disorder. Theoretical background and guidelines for neuroimaging research. Psychiatria Hungarica : a Magyar PszichiáTriai TáRsasáG TudomáNyos FolyóIrata. 26: 178-87. PMID 21799220  1
2011 Tam CS, Berthoud HR, Bueter M, Chakravarthy MV, Geliebter A, Hajnal A, Holst J, Kaplan L, Pories W, Raybould H, Seeley R, Strader A, Ravussin E. Could the mechanisms of bariatric surgery hold the key for novel therapies? report from a Pennington Scientific Symposium. Obesity Reviews : An Official Journal of the International Association For the Study of Obesity. 12: 984-94. PMID 21729236 DOI: 10.1111/j.1467-789X.2011.00902.x  1
2011 Pritchett CE, Hajnal A. Obesogenic diets may differentially alter dopamine control of sucrose and fructose intake in rats. Physiology & Behavior. 104: 111-6. PMID 21549729 DOI: 10.1016/j.physbeh.2011.04.048  1
2010 Hajnal A, Kovacs P, Ahmed T, Meirelles K, Lynch CJ, Cooney RN. Gastric bypass surgery alters behavioral and neural taste functions for sweet taste in obese rats. American Journal of Physiology. Gastrointestinal and Liver Physiology. 299: G967-79. PMID 20634436 DOI: 10.1152/ajpgi.00070.2010  1
2010 Bello NT, Hajnal A. Dopamine and binge eating behaviors. Pharmacology, Biochemistry, and Behavior. 97: 25-33. PMID 20417658 DOI: 10.1016/j.pbb.2010.04.016  1
2010 Swartz TD, Hajnal A, Covasa M. Altered orosensory sensitivity to oils in CCK-1 receptor deficient rats. Physiology & Behavior. 99: 109-17. PMID 19887078 DOI: 10.1016/j.physbeh.2009.10.016  1
2010 Hajnal A, Norgren R. Dopamine Release by Sucrose The Senses: a Comprehensive Reference. 4: 459-468. DOI: 10.1016/B978-012370880-9.00099-2  1
2009 Hajnal A, Norgren R, Kovacs P. Parabrachial coding of sapid sucrose: relevance to reward and obesity. Annals of the New York Academy of Sciences. 1170: 347-64. PMID 19686159 DOI: 10.1111/j.1749-6632.2009.03930.x  1
2009 Kovacs P, Hajnal A. In vivo electrophysiological effects of insulin in the rat brain. Neuropeptides. 43: 283-93. PMID 19541365 DOI: 10.1016/j.npep.2009.05.006  1
2009 Abraham H, Covasa M, Hajnal A. Cocaine- and amphetamine-regulated transcript peptide immunoreactivity in the brain of the CCK-1 receptor deficient obese OLETF rat. Experimental Brain Research. 196: 545-56. PMID 19533109 DOI: 10.1007/s00221-009-1885-3  1
2008 Kovacs P, Hajnal A. Altered pontine taste processing in a rat model of obesity. Journal of Neurophysiology. 100: 2145-57. PMID 18550724 DOI: 10.1152/jn.01359.2007  1
2008 Hajnal A, Margas WM, Covasa M. Altered dopamine D2 receptor function and binding in obese OLETF rat. Brain Research Bulletin. 75: 70-6. PMID 18158098 DOI: 10.1016/j.brainresbull.2007.07.019  1
2007 Grigson PS, Hajnal A. Once is too much: conditioned changes in accumbens dopamine following a single saccharin-morphine pairing. Behavioral Neuroscience. 121: 1234-42. PMID 18085877 DOI: 10.1037/0735-7044.121.6.1234  1
2007 Hajnal A, Acharya NK, Grigson PS, Covasa M, Twining RC. Obese OLETF rats exhibit increased operant performance for palatable sucrose solutions and differential sensitivity to D2 receptor antagonism. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 293: R1846-54. PMID 17804583 DOI: 10.1152/ajpregu.00461.2007  1
2007 She P, Reid TM, Bronson SK, Vary TC, Hajnal A, Lynch CJ, Hutson SM. Disruption of BCATm in mice leads to increased energy expenditure associated with the activation of a futile protein turnover cycle. Cell Metabolism. 6: 181-94. PMID 17767905 DOI: 10.1016/j.cmet.2007.08.003  1
2007 Hajnal A, De Jonghe BC, Covasa M. Dopamine D2 receptors contribute to increased avidity for sucrose in obese rats lacking CCK-1 receptors. Neuroscience. 148: 584-92. PMID 17681694 DOI: 10.1016/j.neuroscience.2007.06.025  1
2007 Anderzhanova E, Covasa M, Hajnal A. Altered basal and stimulated accumbens dopamine release in obese OLETF rats as a function of age and diabetic status. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 293: R603-11. PMID 17553848 DOI: 10.1152/ajpregu.00301.2007  1
2007 De Jonghe BC, Hajnal A, Covasa M. Conditioned preference for sweet stimuli in OLETF rat: effects of food deprivation. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 292: R1819-27. PMID 17272669 DOI: 10.1152/ajpregu.00339.2006  1
2006 Bello NT, Hajnal A. Acute methylphenidate treatments reduce sucrose intake in restricted-fed bingeing rats. Brain Research Bulletin. 70: 422-9. PMID 17027778 DOI: 10.1016/j.brainresbull.2006.07.006  1
2006 Norgren R, Hajnal A, Mungarndee SS. Gustatory reward and the nucleus accumbens. Physiology & Behavior. 89: 531-5. PMID 16822531 DOI: 10.1016/j.physbeh.2006.05.024  1
2006 Liang NC, Hajnal A, Norgren R. Sham feeding corn oil increases accumbens dopamine in the rat. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 291: R1236-9. PMID 16763080 DOI: 10.1152/ajpregu.00226.2006  1
2006 De Jonghe BC, Hajnal A, Covasa M. Decreased gastric mechanodetection, but preserved gastric emptying, in CCK-1 receptor-deficient OLETF rats. American Journal of Physiology. Gastrointestinal and Liver Physiology. 291: G640-9. PMID 16728725 DOI: 10.1152/ajpgi.00109.2006  1
2006 Bello NT, Hajnal A. Alterations in blood glucose levels under hyperinsulinemia affect accumbens dopamine. Physiology & Behavior. 88: 138-45. PMID 16678226 DOI: 10.1016/j.physbeh.2006.03.027  1
2006 Albaugh VL, Henry CR, Bello NT, Hajnal A, Lynch SL, Halle B, Lynch CJ. Hormonal and metabolic effects of olanzapine and clozapine related to body weight in rodents. Obesity (Silver Spring, Md.). 14: 36-51. PMID 16493121 DOI: 10.1038/oby.2006.6  1
2005 Bello NT, Hajnal A. Male rats show an indifference-avoidance response for increasing concentrations of the artificial sweetener sucralose. Nutrition Research (New York, N.Y.). 25: 693-699. PMID 16810335 DOI: 10.1016/j.nutres.2005.07.003  1
2005 Hajnal A, Covasa M, Bello NT. Altered taste sensitivity in obese, prediabetic OLETF rats lacking CCK-1 receptors. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 289: R1675-86. PMID 16081877 DOI: 10.1152/ajpregu.00412.2005  1
2005 Corwin RL, Hajnal A. Too much of a good thing: neurobiology of non-homeostatic eating and drug abuse. Physiology & Behavior. 86: 5-8. PMID 16081112 DOI: 10.1016/j.physbeh.2005.06.021  1
2005 De Jonghe BC, Di Martino C, Hajnal A, Covasa M. Brief intermittent access to sucrose differentially modulates prepulse inhibition and acoustic startle response in obese CCK-1 receptor deficient rats. Brain Research. 1052: 22-7. PMID 16002053 DOI: 10.1016/j.brainres.2005.06.019  1
2005 Hajnal A, Norgren R. Taste pathways that mediate accumbens dopamine release by sapid sucrose. Physiology & Behavior. 84: 363-9. PMID 15763573 DOI: 10.1016/j.physbeh.2004.12.014  1
2005 De Jonghe BC, Hajnal A, Covasa M. Increased oral and decreased intestinal sensitivity to sucrose in obese, prediabetic CCK-A receptor-deficient OLETF rats. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 288: R292-300. PMID 15358606 DOI: 10.1152/ajpregu.00481.2004  1
2004 Hajnal A, Norgren R. Sucrose sham feeding decreases accumbens norepinephrine in the rat. Physiology & Behavior. 82: 43-7. PMID 15234588 DOI: 10.1016/j.physbeh.2004.04.024  1
2004 Hajnal A, Smith GP, Norgren R. Oral sucrose stimulation increases accumbens dopamine in the rat. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 286: R31-7. PMID 12933362 DOI: 10.1152/ajpregu.00282.2003  1
2003 Bello NT, Sweigart KL, Lakoski JM, Norgren R, Hajnal A. Restricted feeding with scheduled sucrose access results in an upregulation of the rat dopamine transporter. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology. 284: R1260-8. PMID 12521926 DOI: 10.1152/ajpregu.00716.2002  1
2002 Hajnal A, Norgren R. Repeated access to sucrose augments dopamine turnover in the nucleus accumbens. Neuroreport. 13: 2213-6. PMID 12488799 DOI: 10.1097/01.wnr.0000044213.09266.38  1
2002 Bello NT, Lucas LR, Hajnal A. Repeated sucrose access influences dopamine D2 receptor density in the striatum. Neuroreport. 13: 1575-8. PMID 12218708  1
2001 Hajnal A, Norgren R. Accumbens dopamine mechanisms in sucrose intake. Brain Research. 904: 76-84. PMID 11516413 DOI: 10.1016/S0006-8993(01)02451-9  1
2000 Hajnal A, Székely M, Gálosi R, Lénárd L. Accumbens cholinergic interneurons play a role in the regulation of body weight and metabolism. Physiology & Behavior. 70: 95-103. PMID 10978483 DOI: 10.1016/S0031-9384(00)00236-5  1
1999 Hajnal A, Takenouchi K, Norgren R. Effect of intraduodenal lipid on parabrachial gustatory coding in awake rats. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 19: 7182-90. PMID 10436071  1
1999 Mark GP, Hajnal A, Kinney AE, Keys AS. Self-administration of cocaine increases the release of acetylcholine to a greater extent than response-independent cocaine in the nucleus accumbens of rats. Psychopharmacology. 143: 47-53. PMID 10227079 DOI: 10.1007/s002130050918  1
1998 Hajnal A, Mark GP, Keys AS, Lénárd L. Involvement of dopamine and acetylcholine in the interaction between amygdala and nucleus accumbens: chronic microdialysis in rats. Neurobiology (Budapest, Hungary). 6: 363-7. PMID 9778654  1
1998 Hajnal A, Pothos EN, Lénárd L, Hoebel BG. Effects of feeding and insulin on extracellular acetylcholine in the amygdala of freely moving rats. Brain Research. 785: 41-8. PMID 9526040 DOI: 10.1016/S0006-8993(97)01291-2  1
1997 Hajnal A, Gálosi R, Lénárd L. Role of accumbens cholinergic interneurons in the maintenance of body weight. Neurobiology (Budapest, Hungary). 5: 473-6. PMID 9591283  1
1997 Gálosi R, Hajnal A, Fendler K, Lénárd L. Effect of catecholaminergic lesions of medial prefrontal cortex on regulation of body weight and glucose preference. Neurobiology (Budapest, Hungary). 5: 469-72. PMID 9591282  1
1997 Petykó Z, Lénád L, Sümegi B, Hajnal A, Csete B, Faludi B, Jandó G. Learning disturbances in offsprings of zidovudine (AZT) treated rats. Neurobiology (Budapest, Hungary). 5: 83-5. PMID 9302705  1
1997 Gálosi R, Hajnal A, Lénárd L. Nucleus accumbens and body weight regulation: neurochemical lesions. Neurobiology (Budapest, Hungary). 5: 67-70. PMID 9302701  1
1997 Hajnal A, Lénárd L. Feeding-related dopamine in the amygdala of freely moving rats. Neuroreport. 8: 2817-20. PMID 9295124  1
1997 Hajnal A, Lénárd L, Czurkó A, Sándor P, Karádi Z. Distribution and time course of appearance of "dark" neurons and EEG activity after amygdaloid kainate lesion. Brain Research Bulletin. 43: 235-43. PMID 9222537 DOI: 10.1016/S0361-9230(97)00015-4  1
1997 Hajnal A, Mark GP, Rada PV, Lénárd L, Hoebel BG. Norepinephrine microinjections in the hypothalamic paraventricular nucleus increase extracellular dopamine and decrease acetylcholine in the nucleus accumbens: relevance to feeding reinforcement. Journal of Neurochemistry. 68: 667-74. PMID 9003054  1
1996 Hajnal A, Pothos EN, Lénárd L, Hoebel BG. Feeding and acetylcholine in the amygdala: microdialysis in freely moving rats. Neurobiology (Budapest, Hungary). 4: 109-10. PMID 9116686  1
1993 Pungor K, Hajnal A, Kékesi KA, Juhász G. Paradoxical sleep deprivatory effect of a single low dose of MPTP which did not produce dopaminergic cell loss. Experimental Brain Research. 95: 473-6. PMID 8224073 DOI: 10.1007/BF00227140  1
1992 Sándor P, Hajnal A, Jandó G, Karádi Z, Lénárd L. Microelectrophoretic application of kainic acid into the globus pallidus: disturbances in feeding behavior. Brain Research Bulletin. 28: 751-6. PMID 1617459 DOI: 10.1016/0361-9230(92)90255-V  1
1992 Hajnal A, Sándor P, Jandó G, Vida I, Czurkó A, Karádi Z, Lénárd L. Feeding disturbances and EEG activity changes after amygdaloid kainate lesions in the rat. Brain Research Bulletin. 29: 909-16. PMID 1473023 DOI: 10.1016/0361-9230(92)90165-T  1
1991 Lénárd L, Sándor P, Hajnal A, Jandó G, Karádi Z, Kai Y. Sex-dependent body weight changes after iontophoretic application of kainic acid into the LH or VMH. Brain Research Bulletin. 26: 141-8. PMID 2015510 DOI: 10.1016/0361-9230(91)90199-T  1
1991 Lénárd L, Karádi Z, Jandó G, Yoshimatsu H, Hajnal A, Sándor P, Oomura Y. Feeding and body weight regulation after 6-OHDA application into the preoptic area. Brain Research Bulletin. 27: 359-65. PMID 1959030 DOI: 10.1016/0361-9230(91)90125-4  1
1991 Hajnal A, Czurkó A, Karádi Z, Lénárd L. Local and distant effects of amygdaloid kainate lesions in the rat: a silver impregnation study. Acta Biochimica Et Biophysica Hungarica. 26: 71-3. PMID 1844803  1
1991 Hajnal A, Abrahám I, Vida I, Karádi Z, Lénárd L. Hunger- and satiety-related changes of amygdaloid catecholamines: a microdialytic study in freely moving rats. Acta Biochimica Et Biophysica Hungarica. 26: 67-9. PMID 1844801  1
1991 Czurkó A, Faludi B, Vida I, Niedetzky C, Hajnal A, Karádi Z, Lénárd L. Effect of electrophoretically applied neurochemicals on activity of extrapyramidal and limbic neurons in the rat. Acta Biochimica Et Biophysica Hungarica. 26: 57-60. PMID 1688239  1
1988 Lénárd L, Jandó G, Karádi Z, Hajnal A, Sándor P. Lateral hypothalamic feeding mechanisms: iontophoretic effects of kainic acid, ibotenic acid and 6-hydroxydopamine. Brain Research Bulletin. 20: 847-56. PMID 3136864 DOI: 10.1016/0361-9230(88)90101-3  1
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