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Loney GC, Pautassi RM, Kapadia D, Meyer PJ. Nicotine affects ethanol-conditioned taste, but not place, aversion in a simultaneous conditioning procedure. Alcohol 2018; 71:47-55. [PMID: 30029019 DOI: 10.1016/j.alcohol.2018.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 02/21/2018] [Accepted: 02/26/2018] [Indexed: 12/20/2022]
Abstract
The conditioned taste aversion (CTA) induced by ethanol is a key factor limiting ethanol intake. Nicotine, a drug co-consumed with ethanol, may decrease this aversion by modulating the unconditioned effects of ethanol or by disrupting the association between ethanol and its associated cues. This study analyzed ethanol-induced CTA and conditioned place aversion (CPA) in Long-Evans rats with subchronic exposure to nicotine. The rats were treated with nicotine (0.0 or 0.4 mg/kg) three times before conditioning (on lickometer training sessions 3, 4, and 5) and across conditioning days. During the conditioning the rats were given ethanol (1.3 g/kg) preceded and followed by presentation of a taste (NaCl) and tactile (rod or hole floors) conditioned stimulus (CS+), respectively. On CS- conditioning days, the rats were given vehicle and exposed to alternative stimuli. Three CTA and CPA testing sessions were then conducted. It was found that nicotine reduced ethanol-induced CTA and enhanced locomotor activity, but did not significantly modify the magnitude of ethanol-induced CPA. The effects of nicotine on CTA were observed during both conditioning and testing sessions, and were specific to the NaCl CS+, having no effect on reactivity to water. The dissociation between the effect of nicotine on ethanol-induced CTA and CPA suggests that nicotine does not alter ethanol's motivational properties by generally increasing its positive rewarding effects, nor does it blunt all aversive-like responses to this drug. Instead, nicotine may impede ethanol-induced CTA induced by ethanol by disrupting the neural underpinnings of this specific form of associative learning.
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Affiliation(s)
- Gregory C Loney
- Department of Psychology, State University of New York at Buffalo, Buffalo, NY 14260, United States
| | - Ricardo Marcos Pautassi
- Instituto de Investigación Médica M. y M. Ferreyra (INIMEC - CONICET-UNC), Córdoba, C.P. 5000, Argentina; Facultad de Psicología, Universidad Nacional de Córdoba, Córdoba, C.P. 5000, Argentina.
| | | | - Paul J Meyer
- Department of Psychology, State University of New York at Buffalo, Buffalo, NY 14260, United States
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Reid SNS, Ryu JK, Kim Y, Jeon BH. GABA-enriched fermented Laminaria japonica improves cognitive impairment and neuroplasticity in scopolamine- and ethanol-induced dementia model mice. Nutr Res Pract 2018; 12:199-207. [PMID: 29854325 PMCID: PMC5974065 DOI: 10.4162/nrp.2018.12.3.199] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/14/2018] [Accepted: 02/28/2018] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND/OBJECTIVES Fermented Laminaria japonica (FL), a type sea tangle used as a functional food ingredient, has been reported to possess cognitive improving properties that may aid in the treatment of common neurodegenerative disorders, such as dementia. MATERIALS/METHODS We examined the effects of FL on scopolamine (Sco)- and ethanol (EtOH)-induced hippocampus-dependent memory impairment, using the Passive avoidance (PA) and Morris water maze (MWM) tests. To examine the underlying mechanisms associated with neuroprotective effects, we analyzed acetylcholine (ACh) and acetylcholinesterase (AChE) activity, brain tissue expression of muscarinic acetylcholine receptor (mAChR), cAMP response element binding protein (CREB) and extracellular signal-regulated kinases 1/2 (ERK1/2), and immunohistochemical analysis, in the hippocampus of mice, compared to current drug therapy intervention. Biochemical blood analysis was carried out to determine the effects of FL on alanine transaminase (ALT), aspartate transaminase (AST), and triglyceride (TG) and total cholesterol (TC) levels. 7 groups (n = 10) consisted of a control (CON), 3 Sco-induced dementia and 3 EtOH-induced dementia groups, with both dementia group types containing an untreated group (Sco and EtOH); a positive control, orally administered donepezil (Dpz) (4mg/kg) (Sco + Dpz and EtOH + Dpz); and an FL (50 mg/kg) treatment group (Sco + FL50 and EtOH + FL50), orally administered over the 4-week experimental period. RESULTS FL50 significantly reduced EtOH-induced increase in AST and ALT levels. FL50 treatment reduced EtOH-impaired step-through latency time in the PA test, and Sco- and EtOH-induced dementia escape latency times in the MWM test. Moreover, anticholinergic effects of Sco and EtOH on the brain were reversed by FL50, through the attenuation of AChE activity and elevation of ACh concentration. FL50 elevated ERK1/2 protein expression and increased p-CREB (ser133) in hippocampus brain tissue, according to Western blot and immunohistochemistry analysis, respectively. CONCLUSION Overall, these results suggest that FL may be considered an efficacious intervention for Sco- and EtOH-induced dementia, in terms of reversing cognitive impairment and neuroplastic dysfunction.
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Affiliation(s)
- Storm N S Reid
- Department of Physical Education, School of Sports and Health, Kyungsung University, 309, Suyeong-ro, Nam-gu, Busan 48434, Korea
| | - Je-Kwang Ryu
- Institute for Cognitive Science, College of Humanities, Seoul National University, Seoul 08826, Korea
| | - Yunsook Kim
- Marine Bio-Industry Development Center, Marine Bioprocess Co., Ltd., Busan 46048, Korea
| | - Byeong Hwan Jeon
- Department of Physical Education, School of Sports and Health, Kyungsung University, 309, Suyeong-ro, Nam-gu, Busan 48434, Korea
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Kwak Y, Rhyu MR, Bai SJ, Sa YH, Kwon MJ, Lee BH. c-Fos Expression in the Nucleus of the Solitary Tract in Response to Salt Stimulation in Rats. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2011; 15:437-43. [PMID: 22359483 PMCID: PMC3282233 DOI: 10.4196/kjpp.2011.15.6.437] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 12/17/2011] [Accepted: 12/20/2011] [Indexed: 01/19/2023]
Abstract
Salt signals in tongue are relayed to the nucleus of the solitary tract (NST). This signaling is very important to determine whether to swallow salt-related nutrition or not and suggests some implications in discrimination of salt concentration. Salt concentration-dependent electrical responses in the chorda tympani and the NST were well reported. But salt concentration-dependency and spatial distribution of c-Fos in the NST were not well established. In the present study, NaCl signaling in the NST was studied in urethane-anesthetized rats. The c-Fos immunoreactivity in the six different NST areas along the rostral-caudal axis and six subregions in each of bilateral NST were compared between applications of distilled water and different concentrations of NaCl to the tongue of experimental animals. From this study, salt stimulation with high concentration (1.0 M NaCl) induced significantly higher c-Fos expression in intermediate NST and dorsal-medial and dorsal-middle subregions of the NST compared to distilled water stimulation. The result represents the specific spatial distribution of salt taste perception in the NST.
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Affiliation(s)
- Yongho Kwak
- Department of Physiology, Yonsei University College of Medicine, Seoul 120-752, Korea
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Van Daele DJ, Fazan VPS, Agassandian K, Cassell MD. Amygdala connections with jaw, tongue and laryngo-pharyngeal premotor neurons. Neuroscience 2011; 177:93-113. [PMID: 21211549 DOI: 10.1016/j.neuroscience.2010.12.063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 12/28/2010] [Accepted: 12/29/2010] [Indexed: 01/23/2023]
Abstract
As the central nucleus (CE) is the only amygdaloid nucleus to send axons to the pons and medulla, it is thought to be involved in the expression of conditioned responses by accessing hindbrain circuitry generating stereotypic responses to aversive stimuli. Responses to aversive oral stimuli include gaping and tongue protrusion generated by central pattern generators and other premotor neurons in the ponto-medullary reticular formation. We investigated central nucleus connections with the reticular formation by identifying premotor reticular formation neurons through the retrograde trans-synaptic transport of pseudorabies virus (PRV) inoculated into masseter, genioglossus, thyroarytenoid or inferior constrictor muscles in combination with anterograde labeling of CE axons with biotinylated dextran amine. Three dimensional mapping of PRV infected premotor neurons revealed specific clusters of these neurons associated with different oro-laryngo-pharyngeal muscles, particularly in the parvicellular reticular formation. CE axon terminals were concentrated in certain parvicellular clusters but overall putative contacts were identified with premotor neurons associated with all four oro-laryngo-pharyngeal muscles investigated. We also mapped the retrograde trans-synaptic spread of PRV through the various nuclei of the amygdaloid complex. Medial CE was the first amygdala structure infected (4 days post-inoculation) with trans-synaptic spread to the lateral CE and the caudomedial parvicellular basolateral nucleus by day 5 post-inoculation. Infected neurons were only very rarely found in the lateral capsular CE and the lateral nucleus and then at only the latest time points. The data demonstrate that the CE is directly connected with clusters of reticular premotor neurons that may represent complex pattern generators and/or switching elements for the generation of stereotypic oral and laryngo-pharyngeal movements during aversive oral stimulation. Serial connections through the amygdaloid complex linked with the oro-laryngo-pharyngeal musculature appear quite distinct from those believed to sub-serve fear responses, suggesting there are distinct "channels" for the acquisition and expression of particular conditioned behaviors.
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Affiliation(s)
- D J Van Daele
- Department of Otolaryngology-Head & Neck Surgery, Roy J. and Lucille Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
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Molecular cloning and effect of c-fos mRNA on pharmacological stimuli in the goldfish brain. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY D-GENOMICS & PROTEOMICS 2006; 1:253-9. [DOI: 10.1016/j.cbd.2005.12.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2005] [Revised: 12/12/2005] [Accepted: 12/26/2005] [Indexed: 11/20/2022]
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Grabus SD, Glowa JR, Riley AL. Morphine- and cocaine-induced c-Fos levels in Lewis and Fischer rat strains. Brain Res 2004; 998:20-8. [PMID: 14725964 DOI: 10.1016/j.brainres.2003.11.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Lewis (LEW) and Fischer 344 (F344) rat strains have been reported to differ in their sensitivity to the rewarding and aversive effects of both cocaine and morphine. Specifically, LEW rats self-administer morphine and cocaine to a greater extent than F344 rats, while LEW (compared to F344) rats are more sensitive to the aversive effects of cocaine but less sensitive to the aversive effects of morphine. Consistent with assessments of the rewarding effects of morphine and cocaine in these two strains, LEW rats have lower basal, and generally higher drug-induced, activity in brain regions associated with reward. Although the brain areas that mediate the aversive effects of drugs are becoming better defined, no studies have compared the activation of these areas by aversion-inducing drugs in the LEW and F344 strains. As such, the relationship between the ability of drugs to activate these aversion-associated brain areas and to induce a conditioned taste aversion (CTA) in these strains is unknown. To explore this relationship, LEW and F344 rats were injected with saline or doses of morphine or cocaine (32 mg/kg for both drugs) that have been shown to generate differential taste aversion learning in these strains. All animals were subsequently tested for c-Fos expression in areas of the brain associated with aversion learning (the lateral and medial parabrachial nucleus, intermediate and caudal nucleus tractus solitarius and area postrema), reward (the shell of the nucleus accumbens) and locomotion (the core of the nucleus accumbens and the caudate putamen). The present results indicated that patterns of morphine- and cocaine-induced c-Fos within CTA-associated, but not reward- or locomotor-associated, brain regions paralleled the differential behavioral sensitivities of LEW and F344 rats to these drugs within CTA learning. Analyses with other drugs that do and do not induce aversions differentially would further assess the role of these brain areas in aversion learning, in general, and in strain-dependent differences, in particular.
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Affiliation(s)
- Sheri D Grabus
- Psychopharmacology Laboratory, Department of Psychology, American University, 4400 Massachusetts Avenue, NW, Washington, DC 20016, USA
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Abstract
Conditioned food aversion (CFA) and taste aversion (CTA) are widely occurring phenomena mediating rejection of solids or liquids, the ingestion of which has induced the onset of post-ingestional malaise. It is a powerful and durable imprint learning that may influence food choice and intake in all animals, including humans. For ethical reasons, CTA has been extensively investigated in a wide variety of laboratory animal's species but only incidentally in humans. Nevertheless, convincing evidence has been provided that CFA and CTA learning are possible in a wide range of human subjects. The results in humans may have some limitations in accuracy since data are sparse, sometimes indirect, and poorly controlled. There is only limited information on the extent of CFA in the elderly since most studies have employed questionnaire and/or interview methods on young people (i.e. college students). The present review evaluates the literature derived both from laboratory animals and humans. In the first instance, the salient features of food and taste aversion learning and the neural mechanisms involved in this learning behavior will be examined. Then, the problems encountered when trying to assess the role of learned food and taste aversions in the nutritional status of healthy as well as sick young or elderly people will be considered. In particular, the importance of CFA on the nutritional status of cancer patients and treatment of alcoholism will be examined. It is concluded that the data are compelling enough to warrant further research and, some indications and recommendations are suggested.
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Affiliation(s)
- Giuseppe Scalera
- Dip. Scienze Biomediche, Sez. Fisiologia, Universitá di Modena e Reggio Emilia, Modena, Italy.
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Chapter VIII c-Fos in learning: beyond the mapping of neuronal activity. HANDBOOK OF CHEMICAL NEUROANATOMY 2002. [DOI: 10.1016/s0924-8196(02)80019-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Abstract
Rats in which a ligation of the bile duct (BDL) was paired with a saccharin taste developed a persistent conditioned taste aversion in both preference and taste reactivity tests. All BDL animals regardless of pairing had increased c-Fos-like immunoreactivity (FLI) in the area postrema and the nucleus of the solitary tract. This FLI may reflect the illness associated with BDL, but there was no evidence of conditioned FLI.
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Affiliation(s)
- E S Na
- Department of Psychology, University of Washington, Seattle, WA 98195-1525, USA
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Abstract
Conditioned taste aversion (CTA) is a well established learning and memory paradigm in rats and mice that is considered to be a special form of classical conditioning. Rodents--as well as many other species including man--learn to associate a novel taste (CS) with nausea (US), and as a consequence avoid drinking fluid with this specific taste. In contrast to other types of classical conditioning, even CS-US intervals lasting several hours lead to an aversion to the gustatory CS. With increasing CS-US delay duration, however, the aversion against the CS gradually decreases. Mice differ from rats in their reaction to the CS as well as the US. They tolerate a much higher concentration of saccharin and they do not show any clear signs of nausea when injected with the US. Advantages of this task are its relative independence of motor behavior, well described pathways for the CS and partly the US, and the wealth of available anatomical and pharmacological data implying several brain structures (e.g. parabrachial nucleus, amygdala, insular cortex), neurotransmitters and their receptors (e.g. cholinergic system, NMDA-receptors), and cellular processes (e.g. expression of immediate early genes, Ras-MAP kinase signaling pathway, CREB phosphorilation, protein tyrosine phosphorilation, protein synthesis) in CTA. The CTA paradigm has also been successfully used to phenotype mouse mutants.
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Affiliation(s)
- H Welzl
- Division of Neuroanatomy and Behavior, Institute of Anatomy, University of Zürich, 8057 Zürich, Switzerland.
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Abstract
The concepts and tools of molecular biology may be applied to almost any component of the animal involved in ingestion, but two categories of model system are particularly relevant for molecular analysis: homeostatic regulation of neuropeptide expression in the hypothalamus and neuronal plasticity underlying persistent changes in ingestive behavior. Molecular approaches to these models are reviewed, focusing on our strategy for analyzing conditioned taste aversion learning. Three questions must be answered: Where do the long-term changes occur within the distributed neural network that mediates feeding? This answer reveals the site of neuronal restructuring mediated by gene expression. When does the transition occur from short-term expression to long-term persistence of the change in behavior? This transition reveals the critical time of gene expression. What genes are expressed during the change in behavior? The expression of thousands of genes in discrete subpopulations of cells is likely to be required during critical periods of neuronal restructuring. The identification of these genes is a general challenge for molecular neurobiology. The analysis of ingestive behavior can profit from molecular tools, but ingestion also provides informative models that elucidate the principles of time- and neuron-specific gene expression mediating complex behaviors.
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Affiliation(s)
- T A Houpt
- Department of Biological Science, The Florida State University, Tallahassee, Florida 32306-4340, USA.
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