Causal evidence for the involvement of the neural cell adhesion molecule, NCAM, in chronic stress-induced cognitive impairments

Hippocampus
Reto BisazCarmen Sandi

Abstract

In rodents, chronic stress induces long-lasting structural and functional alterations in the hippocampus, as well as learning and memory impairments. The neural cell adhesion molecule (NCAM) was previously hypothesized to be a key molecule in mediating the effects of stress due to its role in neuronal remodeling and since chronic stress diminishes hippocampal NCAM expression in rats. However, since most of the evidence for these effects is correlative or circumstantial, we tested the performance of conditional NCAM-deficient mice in the water maze task to obtain causal evidence for the role of NCAM. We first validated that exposure to chronic unpredictable stress decreased hippocampal NCAM expression in C57BL/6 wild-type mice, inducing deficits in reversal learning and mild deficits in spatial learning. Similar deficits in water maze performance were found in conditional NCAM-deficient mice that could not be attributed to increased anxiety or enhanced corticosterone responses. Importantly, the performance of both the conditional NCAM-deficient mice and chronically stressed wild-type mice in the water maze was improved by post-training injection of the NCAM mimetic peptide, FGLs. Thus, these findings support the functional invol...Continue Reading

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Citations

Jul 9, 2011·EMBO Molecular Medicine·Silvia ZecchiniUgo Cavallaro
Jul 23, 2013·Neurobiology of Learning and Memory·Inmaculada Pereda-PérezCésar Venero
Nov 12, 2013·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Michael A van der KooijCarmen Sandi
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Sep 24, 2011·Stress : the International Journal on the Biology of Stress·Reto Bisaz, Carmen Sandi
Jul 15, 2017·Scientific Reports·Jamshid FarajiGerlinde A S Metz

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