Alkaline taste sensation through the alkaliphile chloride channel in Drosophila.

Alkaline taste sensation through the alkaliphile chloride channel in Drosophila.
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DOI:
10.1038/s42255-023-00765-3
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发表时间:
2023-03
期刊:
影响因子:
20.8
通讯作者:
Zhang, Yali V.
Zhang, Yali V.
中科院分区:
医学1区
文献类型:
--
作者:
Mi, Tingwei;Mack, John O.;Koolmees, Wyatt;Lyon, Quinn;Yochimowitz, Luke;Teng, Zhao-Qian;Jiang, Peihua;Montell, Craig;Zhang, Yali V.

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口味感是管理动物应该或不应该摄取什么或不应摄入的哨兵的重要哨兵,而高pH值则在食物选择中起着至关重要的作用。在这里,我们探索了使用果蝇Melanogaster作为模型来检测食物基本pH的分子身份。我们确定了一个名为Alkaliphile(ALKA)的氯化物通道,这对于对基本食物的厌恶味道反应既需要又足够。 ALKA形成高ph门控的氯化物通道,并在味觉受体神经元(GRNS)的子集中特别表达。表达ALKA的GRN的光遗传学激活足以抑制对蔗糖的有吸引力的喂养反应。相反,这些GRN的失活会导致对高pH值的厌恶。总的来说,我们将ALKA作为一种碱性味觉受体的发现为未来对其他动物碱性味觉的研究奠定了基础。
The sense of taste is an important sentinel governing what should or should not be ingested by an animal, with high pH sensation playing a critical role in food selection. Here we explore the molecular identities of taste receptors detecting the basic pH of food using Drosophila melanogaster as a model. We identify a chloride channel named alkaliphile (Alka), which is both necessary and sufficient for aversive taste responses to basic food. Alka forms a high-pH-gated chloride channel and is specifically expressed in a subset of gustatory receptor neurons (GRNs). Optogenetic activation of alka-expressing GRNs is sufficient to suppress attractive feeding responses to sucrose. Conversely, inactivation of these GRNs causes severe impairments in the aversion to high pH. Altogether, our discovery of Alka as an alkaline taste receptor lays the groundwork for future research on alkaline taste sensation in other animals.
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