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• W4206447707 abstract "ABSTRACT Parental care is critical for successful reproduction in mammals. In comparison to maternal care, the neuroendocrine mechanisms supporting paternal care are less well-studied. Laboratory mice show a mating-induced suppression of infanticide (normally observed in virgins) and onset of paternal behavior. Using this model, we sought to investigate whether the hormone prolactin plays a role in paternal behavior, as it does for maternal behavior. First, using c-fos immunoreactivity in Prlr-IRES-Cre-tdtomato reporter mouse sires, we show that the circuitry activated during paternal interactions contains prolactin-responsive neurons, including the medial preoptic area, bed nucleus of the stria terminalis, and medial amygdala. To evaluate whether prolactin action is required for the establishment and display of paternal behavior, we conditionally deleted the prolactin receptor (Prlr) from 3 distinct cell types: glutamatergic, GABAergic, and CaMKIIα-expressing forebrain neurons. Prlr-deletion from CaMKIIα-expressing forebrain neurons, but not from glutamatergic or GABAergic cells, resulted in a profound effect on paternal behavior, as none of these males completed the pup retrieval task. Finally, although sires do not show an acute increase in circulating prolactin levels in response to pups, pharmacological blockade of prolactin-release at the time of pup exposure resulted in failure to retrieve pups, similar to when the Prlr was deleted from CaMKIIα neurons, with prolactin administration rescuing this behavior. Taken together, our data show that paternal behavior in sires is dependent on basal levels of circulating prolactin acting at the Prlr on CaMKIIα-expressing neurons. These new data in male mice demonstrate that prolactin has a similar action in both sexes to promote parental care." @default.
• W4206447707 created "2022-01-26" @default.
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• W4206447707 date "2021-12-30" @default.
• W4206447707 modified "2023-10-12" @default.
• W4206447707 title "Prolactin action is necessary for parental behavior in male mice" @default.
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• W4206447707 doi "https://doi.org/10.1101/2021.12.30.474525" @default.
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