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触觉刺激和新生期隔离影响幼鼠与可卡因给药相关的行为和氧化状态。

Tactile stimulation and neonatal isolation affect behavior and oxidative status linked to cocaine administration in young rats.

作者信息

Antoniazzi Caren T D, Boufleur Nardeli, Pase Camila S, Kuhn Fábio T, Dias Verônica T, Segat Hecson J, Roversi Karine, Roversi Katiane, Benvegnú Dalila M, Bürger Marilise E

机构信息

Programa de Pós Graduação em Farmacologia, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 21, Cidade Universitária, CEP 97105-900 Santa Maria, RS, Brazil.

Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Av. Roraima, 1000, Prédio 21, Cidade Universitária, CEP 97105-900 Santa Maria, RS, Brazil.

出版信息

Behav Processes. 2014 Mar;103:297-305. doi: 10.1016/j.beproc.2014.01.011. Epub 2014 Jan 24.

Abstract

We investigated the influence of neonatal handling on cocaine-induced conditioned place preference (CPP), anxiety-like symptoms and oxidative status related to drug abstinence in young rats. Pups were submitted to tactile stimulation (TS) or neonatal isolation (NI10 or NI60) after birth, and then were submitted to CPP performed with cocaine. TS group did not show place preference, while unhandled (UH), NI10 and NI60 rats did. Handling was related to anxiety-like symptoms per se in UH and NI60 groups and this behavior was also observed in the cocaine-conditioned rats exposed to the same handlings. Both TS and NI10 pups treated or not with cocaine showed less anxiety-like behavior than animals submitted to other handlings. TS reduced protein carbonyl (PC) in cortex and NI60 increased PC in both striatum and hippocampus of cocaine-treated rats. Among cocaine-treated rats, both times of NI increased plasma lipoperoxidation levels, which was reduced by TS in erythrocytes. TS increased the catalase activity in brain areas, while other handlings did not change this. Both TS and NI10 increased plasma vitamin C levels. These findings indicate that neonatal handling can modify anxiety-like symptoms related to cocaine preference and abstinence, and its protective influence, especially TS, on the antioxidant system.

摘要

我们研究了新生期处理对可卡因诱导的条件性位置偏爱(CPP)、焦虑样症状以及与幼鼠药物戒断相关的氧化状态的影响。幼崽出生后接受触觉刺激(TS)或新生期隔离(NI10或NI60),然后接受可卡因诱导的CPP实验。TS组未表现出位置偏爱,而未处理(UH)组、NI10组和NI60组的大鼠表现出位置偏爱。处理本身与UH组和NI60组的焦虑样症状有关,在接受相同处理的可卡因条件化大鼠中也观察到了这种行为。无论是否用可卡因处理,TS组和NI10组的幼崽都比接受其他处理的动物表现出更少的焦虑样行为。TS降低了可卡因处理大鼠皮质中的蛋白质羰基(PC)含量,而NI60增加了纹状体和海马体中的PC含量。在可卡因处理的大鼠中,两次NI处理均增加了血浆脂质过氧化水平,而TS降低了红细胞中的脂质过氧化水平。TS增加了脑区的过氧化氢酶活性,而其他处理则未改变这一活性。TS和NI10均增加了血浆维生素C水平。这些发现表明,新生期处理可以改变与可卡因偏爱和戒断相关的焦虑样症状,以及其对抗氧化系统的保护作用,尤其是TS的保护作用。

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