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2016 ; 113
(45
): E7097-E7105
Nephropedia Template TP
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Neonatal isolation augments social dominance by altering actin dynamics in the
medial prefrontal cortex
#MMPMID27791080
Tada H
; Miyazaki T
; Takemoto K
; Takase K
; Jitsuki S
; Nakajima W
; Koide M
; Yamamoto N
; Komiya K
; Suyama K
; Sano A
; Taguchi A
; Takahashi T
Proc Natl Acad Sci U S A
2016[Nov]; 113
(45
): E7097-E7105
PMID27791080
show ga
Social separation early in life can lead to the development of impaired
interpersonal relationships and profound social disorders. However, the
underlying cellular and molecular mechanisms involved are largely unknown. Here,
we found that isolation of neonatal rats induced glucocorticoid-dependent social
dominance over nonisolated control rats in juveniles from the same litter.
Furthermore, neonatal isolation inactivated the actin-depolymerizing factor
(ADF)/cofilin in the juvenile medial prefrontal cortex (mPFC). Isolation-induced
inactivation of ADF/cofilin increased stable actin fractions at dendritic spines
in the juvenile mPFC, decreasing glutamate synaptic AMPA receptors. Expression of
constitutively active ADF/cofilin in the mPFC rescued the effect of isolation on
social dominance. Thus, neonatal isolation affects spines in the mPFC by reducing
actin dynamics, leading to altered social behavior later in life.