Journal of Integrative Agriculture ›› 2024, Vol. 23 ›› Issue (2): 605-620.DOI: 10.1016/j.jia.2023.07.016

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cAMP依赖性蛋白激酶A在桔小实蝇长期记忆形成中的作用

  

  • 修回日期:2023-02-22 接受日期:2023-05-17 出版日期:2024-02-20 发布日期:2024-01-29

The role of cAMP-dependent protein kinase A in the formation of long-term memory in Bactrocera dorsalis

Jinxin Yu1*, Yanmin Hui1*, Jiayi He1*, Yinghao Yu1, Zhengbing Wang2, Siquan Ling3, Wei Wang1, Xinnian Zeng1#, Jiali Liu1#   

  1. 1 National Key Laboratory of Green Pesticides/Guangdong Engineering Research Center for Insect Behavior Regulation/College of Plant Protection, South China Agricultural University, Guangzhou 510642, China

    2 College of Life Science and Agronomy, Zhoukou Normal University, Zhoukou 466001, China

    3 Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China

  • Revised:2023-02-22 Accepted:2023-05-17 Online:2024-02-20 Published:2024-01-29
  • About author:Jinxin Yu, E-mail: jinxinyu1994@163.com; #Correspondence Xinnian Zeng, E-mail: zengxn@scau.edu.cn; Jiali Liu, E-mail: shirley4461@scau.edu.cn *These authors contributed equally to this study.
  • Supported by:

    This work was funded by the National Natural Science Foundation of China (32072486 and 31971424).

摘要:

环磷酸腺苷(cyclic AMP,cAMP)依赖的蛋白激酶Aprotein kinase A,PKA)信号通路一直被认为是长期记忆(long-term Memory,LTM)形成的关键。先前的研究大多基于PKA信号在多次间隔训练诱导的LTM中的作用,而对单次训练诱导的LTM的研究较少。本研究通过行为药理学、酶联免疫吸附测定(enzyme linked immunosorbent assay,ELISA)和RNA干扰实验,究了PKA信号通路在农业害虫小实蝇LTM形成中的作用。小实蝇具有较强的记忆能力,在训练试验中也能形成持续两天的长期记忆。研究结果发现,在条件训练前阻断或激活PKA,两种处理方式均影响桔小实蝇间隔训练形成的LTM,但不会影响训练形成的LTM通过ELISA以及沉默蛋白激酶调节亚基2和催化亚基1的进一步证实了这一结论。综上所述,激活PKA有助于诱导多次间隔训练形成的LTM,而训练形成的LTM并不受其影响。这一发现挑战了PKA信号在LTM形成中的保守作用,这为跨物种LTM形成的分子机制多样性以及可能的功能和进化意义提供了基础。

Abstract:

The cAMP-dependent protein kinase A (PKA) signaling pathway has long been considered critical for long-term memory (LTM) formation.  Previous studies have mostly focused on the role of PKA signaling in LTM induction by multiple spaced conditioning with less attention to LTM induction by a single conditioning.  Here, we conducted behavioral-pharmacology, enzyme immunoassay and RNA interference experiments to study the role of the PKA signaling pathway in LTM formation in the agricultural pest Bactrocera dorsalis, which has a strong memory capacity allowing it to form a two-day memory even from a single conditioning trial.  We found that either blocking or activating PKA prior to conditioning pretreatment affected multiple spaced LTM, and conversely, they did not affect LTM formed by single conditioning.  This was further confirmed by enzyme-linked immunosorbent assay (ELISA) and silencing of the protein kinase regulatory subunit 2 and catalytic subunit 1.  Taken together, these results suggest that activating PKA during memory acquisition helps to induce the LTM formed by multiple spaced conditioning but not by a single conditioning.  Our findings challenge the conserved role of PKA signaling in LTM, which provides a basis for the greater diversity of molecular mechanisms underlying LTM formation across species, as well as possible functional and evolutionary implications.

Key words: Bactrocera dorsalis ,  LTM ,  multiple spaced ,  PKA ,  single