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      Taste neophobia, latent inhibition of taste aversion and object recognition memory in adolescent rats Translated title: Neofobia gustativa, inhibición latente de la aversión gustativa y memoria de reconocimiento de objetos en ratas adolescentes

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          Abstract

          Abstract Background: Adolescence in mammals is a period marked by increased novelty-seeking and enhanced responsiveness to the stressful properties of novel stimuli. Despite the need to taste potentially toxic novel foods during the adolescent growth spurt, there has been little study of taste neophobia and its attenuation. Method: Four experiments were carried out to compare taste neophobia and related memory processes in male and female adolescent (PND28) and adult (PND70) Wistar rats. Experiments 1 and 2 evaluated attenuation of taste neophobia to cider vinegar (3%) and sodium saccharin (0.1%) solutions were evaluated. Additionally, to test the role of memory in neophobia during adolescence, latent inhibition of taste aversion and object recognition memory were assessed in Experiment 3 and Experiment 4, respectively. Results: Adolescent and adult rats exhibited taste neophobia to the saccharin solution but adolescent rats required more exposure trials than adults to recognize the vinegar solution as safe. Both groups exhibited similar latent inhibition of taste aversion and object recognition memory. No sex effect was significant. Conclusions: Contrary to the accepted view associating adolescence with reduced neophobia, adolescent rats exhibited taste neophobia which even increased when sour tastes were encountered.

          Translated abstract

          Resumen Antecedentes: La adolescencia está marcada por búsqueda de la novedad y acentuada sensibilidad a las propiedades estresantes de los estímulos novedosos. A pesar de la necesidad de probar nuevos alimentos potencialmente tóxicos durante el periodo de crecimiento adolescente, la neofobia gustativa y su atenuación durante este periodo apenas ha sido estudiada. Método: Se evaluaron la neofobia gustativa y los procesos de memoria relacionados en ratas Wistar macho y hembra adolescentes (PND28) y adultas (PND70). En los Experimentos 1 y 2 Se exploró la atenuación de la neofobia gustativa a soluciones de vinagre de sidra (3%) y sacarina sódica (0,1%), respectivamente. En los experimentos 3 y 4, se evaluó también la inhibición latente de aversiones gustativas y la memoria de reconocimiento de objetos. Resultados: Adolescentes y adultos mostraron neofobia gustativa a la sacarina, pero las ratas adolescentes requirieron más exposiciones a la solución de vinagre para reconocerla como segura. No hubo diferencias entre los grupos en los Experimentos 3 and 4. No se hallaron efectos significativos del sexo. Conclusiones: A pesar de la ampliamente aceptada asociación entre adolescencia y reducida neofobia, las ratas adolescentes muestran neofobia al sabor que resulta incluso incrementada cuando se trata de sabores ácidos.

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              Memory and addiction: shared neural circuitry and molecular mechanisms.

              An important conceptual advance in the past decade has been the understanding that the process of drug addiction shares striking commonalities with neural plasticity associated with natural reward learning and memory. Basic mechanisms involving dopamine, glutamate, and their intracellular and genomic targets have been the focus of attention in this research area. These two neurotransmitter systems, widely distributed in many regions of cortex, limbic system, and basal ganglia, appear to play a key integrative role in motivation, learning, and memory, thus modulating adaptive behavior. However, many drugs of abuse exert their primary effects precisely on these pathways and are able to induce enduring cellular alterations in motivational networks, thus leading to maladaptive behaviors. Current theories and research on this topic are reviewed from an integrative systems perspective, with special emphasis on cellular, molecular, and behavioral aspects of dopamine D-1 and glutamate NMDA signaling, instrumental learning, and drug cue conditioning.
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                Author and article information

                Journal
                psicothema
                Psicothema
                Psicothema
                Colegio Oficial de Psicólogos del Principado de Asturias (Oviedo, Asturias, Spain )
                0214-9915
                1886-144X
                December 2023
                : 35
                : 4
                : 423-431
                Affiliations
                [4] Andalucía orgnameUniversidad de Granada Spain
                [3] Andalucía orgnameUniversidad de Granada Spain
                [1] Andalucía orgnameUniversidad de Granada Spain
                [2] Andalucía orgnameUniversidad de Granada Spain
                [5] Andalucía orgnameUniversidad de Granada Spain
                Article
                S1886-144X2023000400010 S1886-144X(23)03500400010
                10.7334/psicothema2022.256
                9697c628-ec7f-4384-9ada-a9891de7dce9

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 17 August 2022
                : 03 June 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 9
                Product

                SciELO Spain

                Categories
                Articles

                Recognition memory,Flavor,Attenuation of neophobia,Rata,Memoria de reconocimiento,Adolescence,Sabor,Atenuación de la neofobia,Adolescencia,Rat

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