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Lifelong Reductions of PKM[zeta] in Ventral Hippocampus of Nonhuman Primates Exposed to Early-Life Adversity Due to Unpredictable Maternal Care
- Source :
-
Learning & Memory . Sep 2021 28(9):341-347. - Publication Year :
- 2021
-
Abstract
- Protein kinase M[zeta] (PKM[zeta]) maintains long-term potentiation (LTP) and long-term memory through persistent increases in kinase expression. Early-life adversity is a precursor to adult mood and anxiety disorders, in part, through persistent disruption of emotional memory throughout life. Here we subjected 10- to 16-wk-old male bonnet macaques to adversity by a maternal variable-foraging demand paradigm. We then examined PKM[zeta] expression in their ventral hippocampi as 7- to 12-yr-old adults. Quantitative immunohistochemistry reveals decreased PKM[zeta] in dentate gyrus, CA1, and subiculum of subjects who had experienced early-life adversity due to the unpredictability of maternal care. Adult animals with persistent decrements of PKM[zeta] in ventral hippocampus express timid rather than confrontational responses to a human intruder. Persistent down-regulation of PKM[zeta] in the ventral hippocampus might reduce the capacity for emotional memory maintenance and contribute to the long-lasting emotional effects of early-life adversity.
Details
- Language :
- English
- ISSN :
- 1072-0502
- Volume :
- 28
- Issue :
- 9
- Database :
- ERIC
- Journal :
- Learning & Memory
- Publication Type :
- Academic Journal
- Accession number :
- EJ1314379
- Document Type :
- Journal Articles<br />Reports - Research
- Full Text :
- https://doi.org/10.1101/lm.053468.121