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Akt and its phosphorylation in nucleus accumbens mediate heroin-seeking behavior induced by cues in rats.
Zhu, Huaqiang; Zhuang, Dingding; Lou, Zhongze; Lai, Miaojun; Fu, Dan; Hong, Qingxiao; Liu, Huifen; Zhou, Wenhua.
Afiliação
  • Zhu H; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Zhuang D; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Lou Z; Department of Psychosomatic Medicine, Ningbo First Hospital, Ningbo Hospital of Zhejiang University, China.
  • Lai M; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Fu D; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Hong Q; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Liu H; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
  • Zhou W; Zhejiang Provincial Key Laboratory of Addiction Research, Ningbo Kangning Hospital, School of Medicine, Ningbo University, China.
Addict Biol ; 26(5): e13013, 2021 09.
Article em En | MEDLINE | ID: mdl-33619816
Akt is initially identified as one of the downstream targets of phosphatidylinositol-3 kinase (PI3K) and is involved in morphine reward and tolerance. However, whether phospholyration of Akt (p-Akt) mediates heroin relapse remains unclear. Here, we aimed to explore the role of p-Akt in the nucleus accumbens (NAc) in cue-induced heroin-seeking behaviors after withdrawal. First, rats were trained to self-administer heroin for 14 days, after which we assessed heroin-seeking behaviors induced by a context cue (CC) or by discrete conditioned cues (CS) after 1 day or 14 days of withdrawal. We found that the active responses induced by CC or CS after 14 days of withdrawal were higher than those after 1 day of withdrawal. Meanwhile, the expression of p-Akt in the NAc was also greatest when rats were exposed to the CS after 14 days of withdrawal. Additionally, a microinjection of LY294002, an inhibitor of PI3K, into the NAc inhibited the CS-induced heroin-seeking behaviors after 14 days of withdrawal, paralleling the decreased levels of p-Akt in the NAc. Finally, Akt1 or ß-arrestin 2 was downregulated via a lentiviral injection to assess the effect on heroin seeking after 14 days of withdrawal. CS-induced heroin-seeking behavior was inhibited by downregulation of Akt1, but not ß-arrestin 2, in the NAc. These data demonstrate that Akt phosphorylation in the NAc may play an important role in the incubation of heroin-seeking behavior, suggesting that the PI3K/Akt pathways may be involved in the process of heroin relapse and addiction.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Heroína / Proteínas Proto-Oncogênicas c-akt / Comportamento de Procura de Droga / Núcleo Accumbens Limite: Animals Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Heroína / Proteínas Proto-Oncogênicas c-akt / Comportamento de Procura de Droga / Núcleo Accumbens Limite: Animals Idioma: En Ano de publicação: 2021 Tipo de documento: Article