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Appetitive Associative Olfactory Learning in Drosophila Larvae
Published on: February 18, 2013
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一种味觉受体对应物控制了Drosophila的快速避热
Lina Ni1, Peter Bronk, Elaine C Chang
1National Center for Behavioral Genomics, Brandeis University, Waltham, Massachusetts 02454, USA.
Nature
|August 9, 2013
概括
果使用不同的温度传感器来快速或缓慢地对温暖做出反应. 味觉受体 (GR28B(D)) 作为快速反应的外围传感器,而TRPA1则参与缓慢的反应.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 分子生物学分子生物学
背景情况:
- 对温度的行为反应对于生存和保持最佳体温至关重要.
- 热偏好背后的分子和细胞机制尚未得到充分理解.
- 以前对Drosophila melanogaster (果) 的研究提出了关于内部与外围温度传感器的作用的相互矛盾的证据.
研究的目的:
- 为了调和有关Drosophila热偏好的相互矛盾的观点.
- 确定果快速热偏好反应的分子基础.
- 研究味觉受体在热感应中的作用.
主要方法:
- 对热梯度的实验操纵 (浅与).
- 基因分析,包括暂时受体潜在通道TRPA1.1的作用.
- 研究味觉受体GR28B(D) 在热感应中的功能.
- 错误表达实验以评估GR28B的热敏度.
主要成果:
- 虫在的坡度上快速热的偏好不需要TRPA1.1.
- 味觉受体GR28B(D) 通过外围热传感器驱动快速的行为反应.
- GR28B(D) 错误表达赋予各种细胞类型的热敏性,表明其作为热传感器的作用.
- 确定了外围和内部热传感器之间的功能区别.
结论:
- 热偏好是一种多系统反应,在不同的环境中具有不同的机制.
- 以前与温度感觉无关的味觉受体是关键的外围热传感器.
- 这一发现揭示了一种新的热传感分子类,并突出了与内热热调节的并行性.
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