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https://www.readbyqxmd.com/read/28633363/development-initial-testing-and-challenges-of-an-ecologically-valid-reward-prediction-error-fmri-task-for-alcoholism
#1
Anita Cservenka, Kelly E Courtney, Dara G Ghahremani, Kent E Hutchison, Lara A Ray
Aims: To advance translational studies of the role of reward prediction error (PE) in alcohol use disorder, the present study sought to develop and conduct an initial test of an alcohol-specific PE task paradigm using functional magnetic resonance imaging in humans. Methods: Alcohol dependent or social drinkers received small tastes of their preferred alcohol beverage or control beverage, with preceding visual cues indicating whether alcohol (or water) would be delivered...
June 14, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28627906/evidence-of-a-goal-directed-process-in-human-pavlovian-instrumental-transfer
#2
Tina Seabrooke, Mike E Le Pelley, Lee Hogarth, Chris J Mitchell
Cues that signal rewards can motivate reward-seeking behaviors, even for outcomes that are not currently desired. Three experiments examined this phenomenon, using an outcome-selective Pavlovian-instrumental transfer (PIT) design and an outcome devaluation procedure. In Experiment 1, participants learned to perform one response to earn crisps points and another response to earn popcorn points. One outcome was then devalued by adulterating it to make it taste unpleasant. On test, overall response choice was biased toward the outcome that had not been devalued, indicating goal-directed control...
June 19, 2017: Journal of Experimental Psychology. Animal Learning and Cognition
https://www.readbyqxmd.com/read/28624112/opposing-roles-of-rapid-dopamine-signaling%C3%A2-across-the-rostral-caudal-axis-of%C3%A2-the%C3%A2-nucleus-accumbens-shell-in-drug-induced-negative-affect
#3
Seth W Hurley, Elizabeth A West, Regina M Carelli
BACKGROUND: Negative reinforcement theories of drug addiction posit that addicts use drugs to alleviate negative mood states. In a preclinical model developed in our laboratory, rats exhibit negative affect to a normally rewarding taste cue when it predicts impending but delayed cocaine. The emergence of this state is accompanied by a reduction in dopamine concentration in the rostral nucleus accumbens shell. However, the rostral and caudal regions of the shell have been implicated in promoting opposing appetitive and aversive states, respectively...
May 11, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28623169/mutation-of-the-inhibitory-ethanol-site-in-gabaa-%C3%AF-1-receptors-promotes-tolerance-to-ethanol-induced-motor-incoordination
#4
Yuri A Blednov, Cecilia M Borghese, Carlos I Ruiz, Madeline A Cullins, Adriana Da Costa, Elizabeth A Osterndorff-Kahanek, Gregg E Homanics, R Adron Harris
Genes encoding the ρ1/2 subunits of GABAA receptors have been associated with alcohol (ethanol) dependence in humans, and ρ1 was also shown to regulate some of the behavioral effects of ethanol in animal models. Ethanol inhibits GABA-mediated responses in wild-type (WT) ρ1, but not ρ1(T6'Y) mutant receptors expressed in Xenopus laevis oocytes, indicating the presence of an inhibitory site for ethanol in the second transmembrane helix. In this study, we found that ρ1(T6'Y) receptors expressed in oocytes display overall normal responses to GABA, the endogenous GABA modulator (zinc), and partial agonists (β-alanine and taurine)...
June 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28615376/smell-and-taste-dysfunction-is-associated-with-higher-serum-total-cholesterol-concentrations-in-chinese-adults
#5
Zhe Huang, Shue Huang, Hongliang Cong, Zheng Li, Junjuan Li, Kathleen L Keller, Gregory C Shearer, Penny M Kris-Etherton, Shouling Wu, Xiang Gao
Background: Several lipid-related hormones and peptides, such as glucagon-like peptide-1 and leptin, are involved in the regulation of taste and smell function. However, to our knowledge, it remains unknown whether these chemosensory functions are associated with lipid profiles.Objective: We examined the cross-sectional association between taste and smell dysfunction and blood cholesterol concentrations.Methods: With the use of a questionnaire, we assessed chronic smell and taste dysfunction in 12,627 Chinese participants (10,418 men and 2209 women; mean age: 54...
June 14, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28614532/patient-concerns-inventory-for-head-and-neck-cancer-brazilian-cultural-adaptation
#6
Ivy Jungerman, Julia Toyota, Neyller Patriota Montoni, Elma Heitmann Mares Azevedo, Renata Ligia Vieira Guedes, Aline Damascena, Derek Lowe, José Guilherme Vartanian, Simon N Rogers, Luiz Paulo Kowalski
Objective: The purpose of this study was to translate, culturally validate and evaluate the Patients Concerns Inventory - Head and Neck (PCI-H&N) in a consecutive series of Brazilian patients. Method: This study included adult patients treated for upper aerodigestive tract (UADT) cancer. The translation and cultural adaptation of the PCI-H&N followed internationally accepted guidelines and included a pretest sample of patients that completed the first Brazilian Portuguese version of the PCI...
April 2017: Revista da Associação Médica Brasileira
https://www.readbyqxmd.com/read/28608173/improvement-in-submergence-tolerance-of-cherry-through-regulation-of-carbohydrate-metabolism-and-plant-growth-by-pserf-and-pscipk
#7
Lixia Sheng, Xiangyi Meng, Meng Wang, Shu Zang, Liguo Feng
Cherry is an important fruit tree with delicious taste and high economic value, which have been planted worldwide. However, this species cannot withstand the presence of excessive amount of water; submergence injury sometimes occurs during cultivation of cherry and results in severe economic losses. By using a submergence-tolerant germplasm Prunus serrulata "Yimeng" and a submergence-sensitive germplasm Prunus pseudocerasus "Aihua" as test materials, this study cloned PsERF and PsCIPK, which are related to submergence tolerance in cherry, and analyzed the expression of PsERF and PsCIPK in submergence-tolerant and submergence-sensitive germplasms under submergence stress; moreover, the consistency and correlation of such expression with carbohydrate metabolism and plant growth-related genes (PsPDC, PsSUS, PsRAMY, and PsEXP) were analyzed...
June 13, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28606563/participants-with-pharmacologically-impaired-taste-function-seek-out-more-intense-higher-calorie-stimuli
#8
Corinna A Noel, Meaghan Sugrue, Robin Dando
OBJECTIVE: Research suggests a weaker sense of taste in people with obesity, with the assumption that this debilitated taste response increases the desire for more intensely tasting stimuli to compensate for decreased taste input. However, empirical testing of this supposition remains largely absent. METHOD: In a randomized, repeated measure design, 51 healthy subjects were treated with varying concentrations of a tea containing Gymnema sylvestre (GS), to temporarily and selectively diminish sweet taste perception, or a control tea...
June 9, 2017: Appetite
https://www.readbyqxmd.com/read/28600222/taste-bud-derived-bdnf-maintains-innervation-of-a-subset-of-trkb-expressing-gustatory-nerve-fibers
#9
Tao Tang, Jennifer Rios-Pilier, Robin Krimm
Taste receptor cells transduce different types of taste stimuli and transmit this information to gustatory neurons that carry it to the brain. Taste receptor cells turn over continuously in adulthood, requiring constant new innervation from nerve fibers. Therefore, the maintenance of innervation to taste buds is an active process mediated by many factors, including brain-derived neurotrophic factor (BDNF). Specifically, 40% of taste bud innervation is lost when Bdnf is removed during adulthood. Here we speculated that not all gustatory nerve fibers express the BDNF receptor, TrkB, resulting in subsets of neurons that vary in their response to BDNF...
June 20, 2017: Molecular and Cellular Neurosciences
https://www.readbyqxmd.com/read/28597913/inherent-vulnerabilities-in-monoaminergic-pathways-predict-the-emergence-of-depressive-impairments-in-an-animal-model-of-chronic-epilepsy
#10
Jesús-Servando Medel-Matus, Don Shin, Raman Sankar, Andrey Mazarati
The objective was to determine whether the depression comorbid with epilepsy could be predicted based on inherent premorbid patterns of monoaminergic transmission. In male Wistar rats, despair-like and anhedonia-like behaviors were examined using forced swimming and taste preference tests, respectively. Serotonergic raphe nucleus (RN)-prefrontal cortex (PFC) and dopaminergic ventral tegmental area (VTA)-nucleus accumbens (NAcc) pathways were interrogated by fast scan cyclic voltammetry (FSCV). The assays were performed before and 2 months after pilocarpine status epilepticus...
June 9, 2017: Epilepsia
https://www.readbyqxmd.com/read/28595328/genetic-lineage-tracing-in-taste-tissues-using-sox2-creert2-strain
#11
Makoto Ohmoto, Wenwen Ren, Yugo Nishiguchi, Junji Hirota, Peihua Jiang, Ichiro Matsumoto
Taste cells in taste buds are epithelial sensory cells. Old taste bud cells die and are replaced by new ones generated from taste stem cells. Identifying and characterizing adult taste stem cells is therefore important to understand how peripheral taste tissues are maintained. SOX2 is expressed in oral epithelium including gustatory papillae and has been proposed to be a marker of adult taste stem/progenitor cells. Nevertheless, this hypothesis has never been directly tested. Here, by single-color genetic lineage tracing using Sox2-CreERT2 strain, we reveal that all types of taste bud cells distributed throughout the oral epithelium are derived from stem cells that express SOX2...
June 8, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28589232/lingual-tactile-sensitivity-effect-of-age-group-sex-and-fungiform-papillae-density
#12
Ronald G Bangcuyo, Christopher T Simons
Despite its contribution to food perception, lingual tactile sensitivity has been understudied. We hypothesized that sensitivity to threshold and suprathreshold tactile stimuli varies in the population and sought to determine proximate sources of variability. Forty-eight adults were tested for lingual threshold sensitivity via a modified letter identification task and suprathreshold sensitivity via estimation of stimulus size using magnitude estimation. In addition, taste bud density on the anterior tip of each panelist's tongue was estimated by counting the number of fungiform papillae in a 0...
June 6, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28587069/taste-perception-of-sweet-sour-salty-bitter-and-umami-and-changes-due-to-l-arginine-supplementation-as-a-function-of-genetic-ability-to-taste-6-n-propylthiouracil
#13
Melania Melis, Iole Tomassini Barbarossa
Behavioral reaction to different taste qualities affects nutritional status and health. 6-n-Propylthiouracil (PROP) tasting has been reported to be a marker of variation in taste perception, food preferences, and eating behavior, but results have been inconsistent. We showed that l-Arg can enhance the bitterness intensity of PROP, whilst others have demonstrated a suppression of the bitterness of quinine. Here, we analyze the taste perception of sweet, sour, salty, bitter, and umami and the modifications caused by l-Arg supplementation, as a function of PROP-taster status...
May 25, 2017: Nutrients
https://www.readbyqxmd.com/read/28585464/the-contribution-of-aromatic-components-in-katsuobushi-to-preference-formation-and-reinforcement-effect
#14
Takahiko Amitsuka, Maya Okamura, Kei Mukuta, Hiroko Shiibashi, Kenji Haraguchi, Tsukasa Saito, Kazuo Inoue, Tohru Fushiki
Katsuodashi, a dried bonito broth, is very basic and indispensable in Japanese cuisine and contains taste-exhibiting components and unique aroma. We previously reported that its unique aroma contributes to the preference and reinforcement effect associated with dried bonito. This study aims to elucidate the contribution of aromatic components in Katsuobushi to preference formation and reinforcement effect. Volatile components obtained from dried bonito were fractionated and the fractions were subjected to two-bottle choice test...
June 6, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28583654/autistic-traits-associated-with-food-neophobia-but-not-olfactory-sensitivity
#15
Lorenzo D Stafford, Irene Tsang, Beatriz López, Martina Severini, Silvia Iacomini
Food neophobia has been shown to be associated with a range of personality traits (including anxiety, lower sensation seeking) and additionally sensory aspects of food such as taste and texture. Running parallel to that work, research has demonstrated higher incidences of food neophobia in autistic populations and separately evidence of hypersensitivity in some sensory domains. The aim of the current study was to extend our understanding by exploring whether the broader aspects of autistic traits can predict food neophobia in a non-autistic population and whether this is mediated by differences in olfactory sensitivity...
June 3, 2017: Appetite
https://www.readbyqxmd.com/read/28578050/cognitive-decision-strategies-adopted-by-consumers-in-reminder-difference-tests-influence-of-the-authenticity-test
#16
M Stocks, D Shepherd, H-S Lee, D van Hout, M J Hautus
Discrimination tests are used in food companies to quantify small differences between products. Within the diversity of methods available, some are quicker to conduct, whereas others are more sensitive or statistically powerful. One class of methods includes the reminder tasks in which the reference product is given before tasting the actual test stimuli. During the task, such a 'reminder' can be compared directly to each test stimulus, or alternatively, only serve to prime the memory of the judge without being taken into account in decision-making...
July 2017: Food Research International
https://www.readbyqxmd.com/read/28572942/sensory-optimization-of-crackers-developed-from-high-quality-cassava-flour-starch-and-prawn-powder
#17
Paa T Akonor, Nanam T Dziedzoave, Evelyn S Buckman, Edna Mireku Essel, Francis Lavoe, Keith I Tomlins
Crackers produced from high-quality cassava flour (HQCF), cassava starch, and prawn powder were optimized based on sensory preference testing. Ten different formulations of crackers were produced using mixture design. These were subjected to sensory evaluation using attributes such as taste, crispiness, puffiness, and acceptability on a 7-point hedonic scale. A mean score of 4.7, 5.6, 5.2, and 5.2 was obtained correspondingly for taste, crispiness, puffiness, and acceptability. Scores for these attributes indicated that the crackers were acceptable...
May 2017: Food Science & Nutrition
https://www.readbyqxmd.com/read/28569120/burning-mouth-syndrome
#18
Satu K Jääskeläinen, Alain Woda
Objective To review the clinical entity of primary burning mouth syndrome (BMS), its pathophysiological mechanisms, accurate new diagnostic methods and evidence-based treatment options, and to describe novel lines for future research regarding aetiology, pathophysiology, and new therapeutic strategies. Description Primary BMS is a chronic neuropathic intraoral pain condition that despite typical symptoms lacks clear clinical signs of neuropathic involvement. With advanced diagnostic methods, such as quantitative sensory testing of small somatosensory and taste afferents, neurophysiological recordings of the trigeminal system, and peripheral nerve blocks, most BMS patients can be classified into the peripheral or central type of neuropathic pain...
June 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28554850/the-role-of-working-memory-sub-components-in-food-choice-and-dieting-success
#19
Victoria Whitelock, Arie Nouwen, Olga van den Akker, Suzanne Higgs
Evidence suggests a role for self-reported working memory (WM) in self-reported food intake, but it is not known which WM sub-components are involved. It is also important to consider how individual differences in dietary restraint and disinhibition influence WM and the impact of this on food choice. The current study assessed the relationship between WM sub-components and food choice, using computerised measures of WM sub-components and a direct assessment of food intake. The role of dieting success (measured by restraint and disinhibition) as a distal predictor of food choice that influences food choices via WM, and the role of WM more generally in dieting success were investigated...
May 26, 2017: Appetite
https://www.readbyqxmd.com/read/28551714/cue-avoidance-training-and-inhibitory-control-training-for-the-reduction-of-alcohol-consumption-a-comparison-of-effectiveness-and-investigation-of-their-mechanisms-of-action
#20
Lisa C G Di Lemma, Matt Field
RATIONALE: Both cue avoidance training (CAT) and inhibitory control training (ICT) reduce alcohol consumption in the laboratory. However, these interventions have never been directly compared and their mechanisms of action are poorly understood. OBJECTIVES: We compared the effects of both types of training on alcohol consumption and investigated if they led to theoretically predicted changes in alcohol avoidance (CAT) or alcohol inhibition (ICT) associations and changes in evaluation of alcohol cues...
May 27, 2017: Psychopharmacology
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