Methylphenidate Restores Behavioral and Neuroplasticity Impairments in the Prenatal Nicotine Exposure Mouse Model of ADHD: Evidence for Involvement of AMPA Receptor Subunit Composition and Synaptic Spine Morphology in the Hippocampus
In ADHD treatment, methylphenidate (MPH) is the most frequently used medication. The present work provides evidence that MPH restored behavioral impairments and neuroplasticity due to changes in AMPAR subunit composition and distribution, as well as maturation of dendritic spines, in a prenatal nico...
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| Veröffentlicht in: | International journal of molecular sciences 2022-07, Vol.23 (13), p.7099 |
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| creator | Contreras, Darwin Piña, Ricardo Carvallo, Claudia Godoy, Felipe Ugarte, Gonzalo Zeise, Marc Rozas, Carlos Morales, Bernardo |
| description | In ADHD treatment, methylphenidate (MPH) is the most frequently used medication. The present work provides evidence that MPH restored behavioral impairments and neuroplasticity due to changes in AMPAR subunit composition and distribution, as well as maturation of dendritic spines, in a prenatal nicotine exposure (PNE) ADHD mouse model. PNE animals and controls were given a single oral dose of MPH (1 mg/kg), and their behavior was tested for attention, hyperactivity, and working memory. Long-term potentiation (LTP) was induced and analyzed at the CA3/CA1 synapse in hippocampal slices taken from the same animals tested behaviorally, measuring fEPSPs and whole-cell patch-clamp EPSCs. By applying crosslinking and Western blots, we estimated the LTP effects on AMPAR subunit composition and distribution. The density and types of dendritic spines were quantified by using the Golgi staining method. MPH completely restored the behavioral impairments of PNE mice. Reduced LTP and AMPA-receptor-mediated EPSCs were also restored. EPSC amplitudes were tightly correlated with numbers of GluA1/GluA1 AMPA receptors at the cell surface. Finally, we found a lower density of dendritic spines in hippocampal pyramidal neurons in PNE mice, with a higher fraction of thin-type immature spines and a lower fraction of mushroom mature spines; the latter effect was also reversed by MPH. |
| doi_str_mv | 10.3390/ijms23137099 |
| format | Article |
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The present work provides evidence that MPH restored behavioral impairments and neuroplasticity due to changes in AMPAR subunit composition and distribution, as well as maturation of dendritic spines, in a prenatal nicotine exposure (PNE) ADHD mouse model. PNE animals and controls were given a single oral dose of MPH (1 mg/kg), and their behavior was tested for attention, hyperactivity, and working memory. Long-term potentiation (LTP) was induced and analyzed at the CA3/CA1 synapse in hippocampal slices taken from the same animals tested behaviorally, measuring fEPSPs and whole-cell patch-clamp EPSCs. By applying crosslinking and Western blots, we estimated the LTP effects on AMPAR subunit composition and distribution. The density and types of dendritic spines were quantified by using the Golgi staining method. MPH completely restored the behavioral impairments of PNE mice. Reduced LTP and AMPA-receptor-mediated EPSCs were also restored. EPSC amplitudes were tightly correlated with numbers of GluA1/GluA1 AMPA receptors at the cell surface. Finally, we found a lower density of dendritic spines in hippocampal pyramidal neurons in PNE mice, with a higher fraction of thin-type immature spines and a lower fraction of mushroom mature spines; the latter effect was also reversed by MPH.</description><identifier>ISSN: 1422-0067</identifier><identifier>ISSN: 1661-6596</identifier><identifier>EISSN: 1422-0067</identifier><identifier>DOI: 10.3390/ijms23137099</identifier><identifier>PMID: 35806103</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>Animals ; Attention deficit hyperactivity disorder ; Behavior ; Behavioral plasticity ; Cell surface ; Composition ; Crosslinking ; Dendritic spines ; Dendritic structure ; Excitatory postsynaptic potentials ; Hippocampus ; Hyperactivity ; Impulsivity ; Long-term potentiation ; Methylphenidate ; Morphology ; Neuroplasticity ; Nicotine ; Phosphorylation ; Prenatal experience ; Pyramidal cells ; Short term memory ; Subunit structure ; Synapses ; Western blotting ; α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid ; α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors</subject><ispartof>International journal of molecular sciences, 2022-07, Vol.23 (13), p.7099</ispartof><rights>2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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The present work provides evidence that MPH restored behavioral impairments and neuroplasticity due to changes in AMPAR subunit composition and distribution, as well as maturation of dendritic spines, in a prenatal nicotine exposure (PNE) ADHD mouse model. PNE animals and controls were given a single oral dose of MPH (1 mg/kg), and their behavior was tested for attention, hyperactivity, and working memory. Long-term potentiation (LTP) was induced and analyzed at the CA3/CA1 synapse in hippocampal slices taken from the same animals tested behaviorally, measuring fEPSPs and whole-cell patch-clamp EPSCs. By applying crosslinking and Western blots, we estimated the LTP effects on AMPAR subunit composition and distribution. The density and types of dendritic spines were quantified by using the Golgi staining method. MPH completely restored the behavioral impairments of PNE mice. Reduced LTP and AMPA-receptor-mediated EPSCs were also restored. 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| subjects | Animals Attention deficit hyperactivity disorder Behavior Behavioral plasticity Cell surface Composition Crosslinking Dendritic spines Dendritic structure Excitatory postsynaptic potentials Hippocampus Hyperactivity Impulsivity Long-term potentiation Methylphenidate Morphology Neuroplasticity Nicotine Phosphorylation Prenatal experience Pyramidal cells Short term memory Subunit structure Synapses Western blotting α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid α-Amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors |
| title | Methylphenidate Restores Behavioral and Neuroplasticity Impairments in the Prenatal Nicotine Exposure Mouse Model of ADHD: Evidence for Involvement of AMPA Receptor Subunit Composition and Synaptic Spine Morphology in the Hippocampus |
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