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Maternal separation in rats induces neurobiological and behavioral changes on the maternal side

  • The time after parturition is a sensitive period for mothers where they are prone to develop psychopathological symptoms. Studies investigating dams after separation from their pups (maternal separation, MS) showed that MS induces alterations similar to postpartum depression. This study aims to give further details on affected behavior and neurobiology of dams after MS. MS in rats from postnatal day 2–20 over four hours daily was performed. Upon reunion, maternal behavior, and ultrasonic vocalization (USV) of dams were measured. On the day of weaning, dams were tested for anxiety-like behavior in the elevated-plus-maze and marble burying test. Then \(\it Morc1\) mRNA in the medial prefrontal cortex and \(\it Nr3c1\) encoding the glucocorticoid receptor mRNA in the hippocampus were measured using real-time PCR to examine possible neurobiological correlates in psychopathology and social behavior. GABA and glutamate serum levels were analyzed by high-performance liquid chromatography as peripheral markers for stress-induced psychopathology. MS in dams increased maternal care towards pups even though both groups show high levels of maternal behavior even in late lactation. Furthermore, the emission of 50-kHz and 22-kHz USVs increased significantly. No differences in anxiety-like behavior were detected. MS further reduced \(\it Morc1\) but not \(\it Nr3c1\) expression. Serum GABA but not glutamate levels were significantly increased in separated dams. This study reinforces the benefit of investigating dams after MS for studying postpartum stress. Subclinical markers mainly connected to depression, namely \(\it Morc1\) and GABA, proved to be useful allowing for earlier detection of symptoms of critical postpartum stress.

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Metadaten
Author:Ibrahim BölükbasGND, Annakarina MundorfORCiDGND, Nadja FreundORCiDGND
URN:urn:nbn:de:hbz:294-81255
DOI:https://doi.org/10.1038/s41598-020-80087-6
Parent Title (English):Scientific reports
Publisher:Springer Nature
Place of publication:Berlin
Document Type:Article
Language:English
Date of Publication (online):2021/06/08
Date of first Publication:2020/12/31
Publishing Institution:Ruhr-Universität Bochum, Universitätsbibliothek
Tag:Open Access Fonds
Behavioural methods; Neuroscience
GND-Keyword:Biomarker; Depression
Volume:10
Issue:Artikel 22431
First Page:22431-1
Last Page:22431-9
Note:
Article Processing Charge funded by the Deutsche Forschungsgemeinschaft (DFG) and the Open Access Publication Fund of Ruhr-Universität Bochum.
Institutes/Facilities:LWL-Universitätsklinikum Bochum, Klinik für Psychiatrie, Psychotherapie und Präventivmedizin, Klinik für experimentelle und molekulare Psychiatrie
open_access (DINI-Set):open_access
Licence (English):License LogoCreative Commons - CC BY 4.0 - Attribution 4.0 International