title: Impact of maternal separation on neural cell adhesion molecules expression in dopaminergic brain regions of juvenile, adolescent and adult rats.
abstract: Stressful experiences in the early stages of life can influence brain development and maturation, and they can also increase the risk for some psychiatric disorders; however, the specific mechanisms of this effect are still poorly understood. Neural cell adhesion molecules (NCAM 120, 140, 180 kDa) are known to play an important role in normal brain development and synaptic plasticity. Therefore, we decided to investigate whether maternal separation (MS) in rats, a paradigm which models an early life stress, has any impact on the expression of NCAM proteins in the juvenile, adolescent and adult brains of both male and female rats. Specifically, we focused our efforts on the brain regions associated with dopaminergic neurotransmission. In juvenile rats, MS decreased the levels of NCAM-140 in the substantia nigra (SN) of females and NCAM-180 in the ventral tegmental area of males. During adolescence, a reduction in NCAM-180 levels in the SN and medial prefrontal cortex (mPFC) of MS females was revealed. Finally, in adulthood, a decrease in NCAM-180 expression was observed in the mPFC of MS males. The results that we obtained indicate that early life stress can affect maturation and NCAM-driven plasticity in dopaminergic brain areas at different stages of ontogenesis and with a sex-specific manner.
authors.affiliation: Laboratory of Pharmacology and Brain Biostructure, Department of Pharmacology, Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, PL 31-343 Kraków, Poland. chocyk@if-pan.krakow
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Chocyk
authors.forename: Dorota
authors.initials: D
authors.lastname: Dudys
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Przyborowska
authors.forename: Marzena
authors.initials: M
authors.lastname: Maćkowiak
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Wędzony
mesh_terms: D000818:Animals; D004298:Dopamine / Q000378:metabolism*; D005260:Female; D008297:Male; D008426:Maternal Deprivation; D019006:Neural Cell Adhesion Molecules / Q000096:biosynthesis* / Q000378:metabolism; D009473:Neuronal Plasticity; D009474:Neurons / Q000187:drug effects / Q000378:metabolism; D017397:Prefrontal Cortex / Q000166:cytology / Q000378:metabolism*; D051381:Rats; D017208:Rats, Wistar; D013315:Stress, Psychological; D013378:Substantia Nigra / Q000166:cytology / Q000378:metabolism*; D009435:Synaptic Transmission; D017557:Ventral Tegmental Area / Q000166:cytology / Q000378:metabolism*
chemical_list: D019006:Neural Cell Adhesion Molecules; D004298:Dopamine