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Nestin Null Mice Show Improved Reversal Place Learning.

Journal article
Authors Ulrika Wilhelmsson
Marie Kalm
Marcela Pekna
Milos Pekny
Published in Neurochemical research
Volume 45
Issue 1
Pages 215–220
ISSN 1573-6903
Publication year 2020
Published at Institute of Neuroscience and Physiology, Department of Clinical Neuroscience
Institute of Neuroscience and Physiology, Department of Pharmacology
Pages 215–220
Language en
Links dx.doi.org/10.1007/s11064-019-02854...
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Neurobiology

Abstract

The intermediate filament protein nestin is expressed by neural stem cells, but also by some astrocytes in the neurogenic niche of the hippocampus in the adult rodent brain. We recently reported that nestin-deficient (Nes-/-) mice showed increased adult hippocampal neurogenesis, reduced Notch signaling from Nes-/- astrocytes to the neural stem cells, and impaired long-term memory. Here we assessed learning and memory of Nes-/- mice in a home cage set up using the IntelliCage system, in which the mice learn in which cage corner a nose poke earns access to drinking water. Nes-/- and wildtype mice showed comparable place learning assessed as the incorrect corner visit ratio and the incorrect nose poke ratio. However, during reversal place learning, a more challenging task, Nes-/- mice, compared to wildtype mice, showed improved learning over time demonstrated by the incorrect visit ratio and improved memory extinction over time assessed as nose pokes per visit to the previous drinking corner. In addition, Nes-/- mice showed increased explorative activity as judged by the increased total numbers of corner visits and nose pokes. We conclude that Nes-/- mice exhibit improved reversal place learning and memory extinction, a finding which together with the previous results supports the concept of the dual role of hippocampal neurogenesis in cognitive functions.

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