CNGA3 acts as a cold sensor in hypothalamic neurons.

Viktor V Feketa, Yury A Nikolaev, Dana K Merriman, Sviatoslav N Bagriantsev, Elena O Gracheva

eLife 2020 Apr 09

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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 (Ictidomys tridecemlineatus) 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. © 2020, Feketa et al.

Citation

Viktor V Feketa, Yury A Nikolaev, Dana K Merriman, Sviatoslav N Bagriantsev, Elena O Gracheva. CNGA3 acts as a cold sensor in hypothalamic neurons. eLife. 2020 Apr 09;9