Alterations of p75 neurotrophin receptor and Myelin transcription factor 1 in the hippocampus of perinatal phencyclidine treated rats

Journal article


Andrews, Jessica L., Newell, Kelly A., Matosin, Natalie, Huang, Xu-Feng and Fernandez-Enright, Francesca Elizabeth. (2015). Alterations of p75 neurotrophin receptor and Myelin transcription factor 1 in the hippocampus of perinatal phencyclidine treated rats. Progress in Neuropsychopharmacology and Biological Psychiatry. 56(63), pp. 91 - 97. https://doi.org/10.1016/j.pnpbp.2015.06.003
AuthorsAndrews, Jessica L., Newell, Kelly A., Matosin, Natalie, Huang, Xu-Feng and Fernandez-Enright, Francesca Elizabeth
Abstract

Postnatal administration of phencyclidine (PCP) in rodents causes major disturbances to neurological processes resulting in severe modifications to normal behavioral traits into adulthood. It is routinely used to model psychiatric disorders such as schizophrenia, producing many of the dysfunctional processes in the brain that are present in this devastating disorder, including elevated levels of apoptosis during neurodevelopment and disruptions to myelin and plasticity processes. Lingo-1 (or Leucine-rich repeat and immunoglobulin domain-containing protein) is responsible for negatively regulating neurite outgrowth and the myelination of axons. Recent findings using a postmortem human brain cohort showed that Lingo-1 signaling partners in the Nogo receptor (NgR)/p75/TNF receptor orphan Y (TROY) signaling complex, and downstream signaling partners With No Lysine (K) (WNK1) and Myelin transcription factor 1 (Myt1), play a significant part in schizophrenia pathophysiology. Here we have examined the implication of Lingo-1 and its signaling partners in a neurodevelopmental model of schizophrenia using PCP to determine if these pathways are altered in the hippocampus throughout different stages of neurodevelopment. Male Sprague–Dawley rats were injected subcutaneously with PCP (10 mg/kg) or saline solution on postnatal days (PN) 7, 9, and 11. Rats (n = 6/group) were sacrificed at PN12, 5 weeks, or 14 weeks. Relative expression levels of Lingo-1 signaling proteins were examined in the hippocampus of the treated rats. p75 and Myt1 were decreased (0.001 ≤ p ≤ 0.011) in the PCP treated rats at PN12. There were no significant changes in any of the tested proteins at 5 weeks (p > 0.05). At 14 weeks, p75, TROY, and Myt1 were increased in the PCP treated rats (0.014 ≤ p ≤ 0.022). This is the first report of an alteration in Lingo-1 signaling proteins in the rat hippocampus, both directly after PCP treatment in early development and in adulthood. Based on our results, we propose that components of the Lingo-1 signaling pathways may be involved in the acute neurotoxicity induced by perinatal administration of PCP in rats early in development and suggest that this may have implications for the hippocampal deficits seen in schizophrenia.

Keywordshippocampus; lingo-1 signaling; neurodevelopment; phencyclidine animal model; schizophrenia
Year2015
JournalProgress in Neuropsychopharmacology and Biological Psychiatry
Journal citation56 (63), pp. 91 - 97
PublisherElsevier Inc.
ISSN0278-5846
Digital Object Identifier (DOI)https://doi.org/10.1016/j.pnpbp.2015.06.003
Page range91 - 97
Research GroupSchool of Behavioural and Health Sciences
Publisher's version
File Access Level
Controlled
Place of publicationUnited States of Amercia
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