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| 1 | Role of DSC1 in Drosophila melanogaster synaptic activities in response to haedoxan A显示文摘Drosophila sodium channel 1 (DSC1) encodes a voltage-gated divalent cation channel that mediates neuronal excitability in insects. Previous research revealed that DSC1 knockout Drosophila melanogaster conferred different susceptibility to insecticides, which indicated the vital regulation role of DSC1 under insecticide stress. Haedoxan A (HA) is a lignan compound isolated from Phryma leptostachya, and we found that HA has excellent insecticidal activity and is worthy of further study as a botanical insecticide. Herein, we performed bioassay and electrophysiological experiments to test the biological and neural changes in the larval Drosophila with/without DSC1 knockout in response to HA. Bioassay results showed that knockout of DSC1 reduced the sensitivity to HA in both w1118 (a common wild-type strain in the laboratory) and parats1 (a pyrethroid-resistant strain) larvae. Except for parats1/DSC1−/−, electrophysiology results implicated that HA delayed the decay rate and increased the frequency of miniature excitatory junctional potentials of Drosophila from w1118, parats1, and DSC1−/− strains. Moreover, the neuromuscular synapse excitatory activities of parats1/DSC1−/− larvae were more sensitive to HA than DSC1−/− larvae, which further confirmed the functional contribution of DSC1 to neuronal excitability. Collectively, these results indicated that the DSC1 channel not only regulated the insecticidal activity of HA, but also maintained the stability of neural circuits through functional interaction with voltage-gated sodium channels. Therefore, our study provides useful information for elucidating the regulatory mechanism of DSC1 in the neural system of insects involving the action of HA derived from P. leptostachya. | Xingtao Qie Yaxin Ren Xueting Chen Yuzhe Du Ke Dong Zhaonong Hu | 2023 | Insect Science2023，30，6： | 0 |
| 2 | 作用于烟碱型乙酰胆碱受体的杀虫剂研究进展显示文摘烟碱型乙酰胆碱受体是昆虫体内一类重要的神经蛋白,具有多种亚型结构,是开发高效、安全杀虫剂的重要靶标。针对该靶标已开发了多种杀虫剂,从作用机制和化学结构等方面,分类概述了作用于烟碱型乙酰胆碱受体杀虫剂的研究进展。 | 郭林朝 杨鸿浩 李文烨 巨修炼 刘根炎 | 2023 | 化学与生物工程2023，40，4： | 0 |
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