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Early weaning increases anxiety via brain-derived neurotrophic factor signaling in the mouse prefrontal cortex.

Abstract：

:Deprivation of maternal care during early development markedly affects emotional development, but the underlying neuromolecular mechanisms are not fully understood. In a mouse model of disrupted mother-infant relationship, early weaning causes long-term impacts on pups to exhibit increased corticosterone secretion, anxiety, and stress responses in their adulthood. Revealing the molecular mechanisms behind it would beneficial to ameliorating mental problems caused by abuse in childhood. We report that normalizing circulating corticosterone in early-weaned mice, either in adulthood or soon after weaning, ameliorated anxiety levels assessed in the plus maze test. Administering a glucocorticoid receptor antagonist into the prefrontal cortex (PFC) reversed the effects of early weaning, whereas administering corticosterone increased anxiety levels, suggesting that the PFC is corticosterone's target brain region. In the PFCs of early-weaned mice, we observed prolonged reductions in the expression of brain-derived neurotrophic factor (BDNF) and associated mRNAs. Anxiety in early-weaned mice was ameliorated by pretreatment with BDNF or a BDNF receptor agonist. In summary, early weaning increased anxiety levels by modulating glucocorticoid and BDNF signaling in the PFC.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Kikusui T,Kanbara N,Ozaki M,Hirayama N,Ida K,Tokita M,Tanabe N,Mitsuyama K,Abe H,Yoshida M,Nagasawa M,Mogi K

doi

10.1038/s41598-019-40530-9

subject

Has Abstract

pub_date

2019-03-08 00:00:00

pages

3991

issue

1

issn

2045-2322

pii

10.1038/s41598-019-40530-9

journal_volume

9

pub_type

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