An adverse rearing environment alters maternal responsiveness to infant ultrasonic vocalizations.

Autor: Rekapalli AK; Psychology Department, Northeastern University, Boston, Massachusetts, USA., Roman IC; Psychology Department, Northeastern University, Boston, Massachusetts, USA., Brenhouse HC; Psychology Department, Northeastern University, Boston, Massachusetts, USA., Cody CR; Psychology Department, Northeastern University, Boston, Massachusetts, USA.
Jazyk: angličtina
Zdroj: International journal of developmental neuroscience : the official journal of the International Society for Developmental Neuroscience [Int J Dev Neurosci] 2024 Nov; Vol. 84 (7), pp. 797-803. Date of Electronic Publication: 2024 Jul 14.
DOI: 10.1002/jdn.10367
Abstrakt: Rodent pups use a variety of ultrasonic vocalizations (USVs) to facilitate maternal care. Importantly, infant USV repertoires are dependent on both the age and early life experiences of the pups. We have shown that an adverse rearing environment modeled with the maternal separation (MS) paradigm alters caregiving behavior but little is known about how pup USVs differentially elicit maternal attention. In the present study, maternal approach towards a vocalizing pup over a non-vocalizing pup was tested in a Y-maze apparatus at two developmental time points over the course of MS. At postnatal day (P)10, MS dams engaged in longer interaction times with vocalizing pups compared to non-vocalizing pup, and this effect was strongest in male pups. As expected at P20, dams did not show a preference for either the vocalizing or non-vocalizing pups regardless of rearing environment; however, MS dams spent a greater amount of time in the center of the apparatus as compared to control dams, which can be interpreted as a measure of uncertainty or indecision. These effects of MS on dam USV sensitivity are important considering the sex specific effects of MS exposure across all developmental stages. Our novel findings support the hypothesis that sex-specific pup-dam interactions may drive later life outcomes following adversity.
(© 2024 The Author(s). International Journal of Developmental Neuroscience published by Wiley Periodicals LLC on behalf of International Society for Developmental Neuroscience.)
Databáze: MEDLINE
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