Shiyan Liu , Xuefeng Zhang , Xin Gong , Jinxin Yu , Tao Lin , Qian Xiang , Xinnian Zeng , Jiali Liu
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引用次数: 0
Abstract
Dopamine (DA) is a critical molecule within the insect nervous system, known to regulate a myriad of physiological functions and instigate behavioral shifts in insects. It exerts its effects by interacting with specific dopamine receptors (DARs). In this study, three DARs cDNAs from Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) (BdDOP1, BdDOP2 and BdDOP3) were cloned using molecular biology techniques. These receptors exhibited high sequence identity with their orthologous DARs, and phylogenetic analyses also clustered these receptors within their respective receptor subtype. Additionally, the high expression levels of these DARs in the head suggest their prominent role in the central nervous system of B. dorsalis. To investigate the pharmacological properties of these receptors, expression vectors for BdDOP1, BdDOP2 and BdDOP3 were constructed and expressed in HEK-293T cells. Our results demonstrated that DA and synthetic agonists activated these receptors in a dose-dependent manner, and DA activation can be competitively inhibited by various antagonists, exhibiting distinct potencies for each dopamine receptor type. Among the tested antagonists, SCH-23390, methiothepin, and metoclopramide were identified as the most potent inhibitors of BdDOP1, BdDOP2 and BdDOP3, respectively. This study provides valuable insights into the molecular and pharmacological characteristics of DARs in B. dorsalis, offering a theoretical foundation for the development of novel behavioral modulators targeting these receptors. The findings also serve as a reference for the functional analyses of DARs in other insect species.
期刊介绍:
This international journal publishes original contributions and mini-reviews in the fields of insect biochemistry and insect molecular biology. Main areas of interest are neurochemistry, hormone and pheromone biochemistry, enzymes and metabolism, hormone action and gene regulation, gene characterization and structure, pharmacology, immunology and cell and tissue culture. Papers on the biochemistry and molecular biology of other groups of arthropods are published if of general interest to the readership. Technique papers will be considered for publication if they significantly advance the field of insect biochemistry and molecular biology in the opinion of the Editors and Editorial Board.