渴望驱动的湿感官抑制促进了Drosophila寻找水的过程
Li-An Chu1,2,3, Chu-Yi Tai2, Ann-Shyn Chiang2,3,4,5,6
1Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinch 30013, Taiwan.
概括
果使用特定的神经元来感知湿度并找到水. 饥渴改变了这些神经元的反应方式,如IR8a,指导了Drosophila寻找水的行为.
科学领域:
- 神经科学是一个神经科学.
- 行为生物学 行为生物学
- 感官生理学 感官生理学
背景情况:
- 动物的生存取决于与生理需求相匹配的导航环境.
- 在Drosophila melanogaster中,天线离子型受体 (IRs) 介导湿度感应行为 (hygrotaxis).
- 特定的IR神经元在基于内部状态的动态调整hygrotaxis中的作用仍然不清楚.
研究的目的:
- 为了研究IR8a神经元在从避免湿度过渡到渴望水的Drosophila寻找水的行为中的功能.
- 阐明底层湿度偏好和寻找水的行为的神经机制.
- 为了确定涉及干避和潮湿吸引的特定红外神经元.
主要方法:
- 成像测量神经元对湿度刺激的反应在和口渴的中.
- 对IR8a神经元活动的光遗传学操纵.
- 行为测试来评估Drosophila的湿度偏好和寻找水的行为.
主要成果:
- IR8a神经元在的中表现出对高湿度的高反应,在口渴的中减少.
- 乐可基宁神经水平调节IR8a反应,反映了内部水平衡.
- 在口渴的中,IR8a神经元的光遗传激活会诱导避免水分;IR40a神经元与避免干燥有关,IR68a神经元与吸引水分有关.
结论:
- IR8a神经元对于从避免水分转变为在口渴时寻找水而转变的吸湿性行为至关重要.
- 具有相反值 (IR8a,IR40a,IR68a) 的红外神经元之间的动态相互作用建立了湿度偏好.
- 这项研究揭示了Drosophila感官知觉,神经元可塑性,内部状态和适应性hygrotaxis之间的复杂联系.
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