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CNGA3 acts as a cold sensor in hypothalamic neurons

机译:CNGA3充当下丘脑神经元的冷传感器

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摘要

Most mammals maintain their body temperature around 37°C, whereas in hibernators it can approach 0°C without triggering a thermogenic response. The remarkable plasticity of the thermoregulatory system allowed mammals to thrive in variable environmental conditions and occupy a wide range of geographical habitats, but the molecular basis of thermoregulation remains poorly understood. Here we leverage the thermoregulatory differences between mice and hibernating thirteen-lined ground squirrels ( ) to investigate the mechanism of cold sensitivity in the preoptic area (POA) of the hypothalamus, a critical thermoregulatory region. We report that, in comparison to squirrels, mice have a larger proportion of cold-sensitive neurons in the POA. We further show that mouse cold-sensitive neurons express the cyclic nucleotide-gated ion channel CNGA3, and that mouse, but not squirrel, CNGA3 is potentiated by cold. Our data reveal CNGA3 as a hypothalamic cold sensor and a molecular marker to interrogate the neuronal circuitry underlying thermoregulation.
机译:大多数哺乳动物的体温保持在37°C左右,而冬眠器中的体温可以接近0°C而不会触发生热反应。温度调节系统的出色可塑性使哺乳动物能够在变化的环境条件下壮成长并占据广泛的地理栖息地,但对温度调节的分子基础仍然知之甚少。在这里,我们利用小鼠和冬眠的13条衬里的松鼠()之间的体温调节差异来研究下丘脑的视前区(POA)(一个关键的体温调节区域)中的冷敏机制。我们报告,与松鼠相比,小鼠在POA中具有较大比例的冷敏感神经元。我们进一步显示,小鼠冷敏感神经元表达环状核苷酸门控离子通道CNGA3,而小鼠(而不是松鼠)的CNGA3受冷作用增强。我们的数据显示CNGA3作为下丘脑冷传感器和分子标记物来询问潜在的温度调节神经元电路。

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