Suppression of neurons in circumventricular organs enables months-long survival without water in thirteen-lined ground squirrels.

ABSTRACT: Water deprivation is a life-threatening condition that engages a protective physiological response to couple osmolyte retention with potentiation of thirst. This response, typical for most mammals, safeguards against short-term water deprivation but fails in the long term. Thirteen-lined ground squirrels (Ictidomys tridecemlineatus) use the short-term response during summer, whereas during winter, they lack thirst and survive without water for months. In this work, we show that long-term thirst suppression occurs despite hormonal and behavioral signs of a substantial fluid deficit and originates from hypoactivity of neurons in the circumventricular organs, which exhibit marked functional suppression during winter that blunts their sensitivity to thirst cues. Our work reveals a notab

SUBMITTER: Junkins MS 

PROVIDER: S-EPMC11853976 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature