Skip to main content
Top
Published in: Brain Structure and Function 6/2018

01-07-2018 | Original Article

Memory retrieval-induced activation of adult-born neurons generated in response to damage to the dentate gyrus

Authors: Andrea Aguilar-Arredondo, Angélica Zepeda

Published in: Brain Structure and Function | Issue 6/2018

Login to get access

Abstract

The dentate gyrus (DG) is a neurogenic structure that exhibits functional and structural reorganization after injury. Neurogenesis and functional recovery occur after brain damage, and the possible relation between both processes is a matter of study. We explored whether neurogenesis and the activation of new neurons correlated with DG recovery over time. We induced a DG lesion in young adult rats through the intrahippocampal injection of kainic acid and analyzed functional recovery and the activation of new neurons after animals performed a contextual fear memory task (CFM) or a control spatial exploratory task. We analyzed the number of BrdU+ cells that co-localized with doublecortin (DCX) or with NeuN within the damaged DG and evaluated the number of cells in each population that were labelled with the activity marker c-fos after either task. At 10 days post-lesion (dpl), a region of the granular cell layer was devoid of cells, evidencing the damaged area, whereas at 30 dpl this region was significantly smaller. At 10 dpl, the number of BrdU+/DCX+/c-fos positive cells was increased compared to the sham-lesion group, but CFM was impaired. At 30 dpl, a significantly greater number of BrdU+/NeuN+/c-fos positive cells was observed than at 10 dpl, and activation correlated with CFM recovery. Performance in the spatial exploratory task induced marginal c-fos immunoreactivity in the BrdU+/NeuN+ population. We demonstrate that neurons born after the DG was damaged survive and are activated in a time- and task-dependent manner and that activation of new neurons occurs along functional recovery.
Literature
go back to reference Altman J, Das GD (1965) Autoradiographic and histological evidence of postnatal hippocampal neurogenesis in rats. J Comp Neurol 124:319–335CrossRefPubMed Altman J, Das GD (1965) Autoradiographic and histological evidence of postnatal hippocampal neurogenesis in rats. J Comp Neurol 124:319–335CrossRefPubMed
go back to reference Dong H, Csernansky C, Goico B, Csernansky JG (2003) Hippocampal neurogenesis follows kainic acid-induced apoptosis in neonatal rats. J Neurosci 23:1742–1749CrossRefPubMedPubMedCentral Dong H, Csernansky C, Goico B, Csernansky JG (2003) Hippocampal neurogenesis follows kainic acid-induced apoptosis in neonatal rats. J Neurosci 23:1742–1749CrossRefPubMedPubMedCentral
go back to reference Liu J, Solway K, Messing RO, Sharp FR (1998) Increased neurogenesis in the dentate gyrus after transient global ischemia in gerbils. J Neurosci 18:7768–7778CrossRefPubMedPubMedCentral Liu J, Solway K, Messing RO, Sharp FR (1998) Increased neurogenesis in the dentate gyrus after transient global ischemia in gerbils. J Neurosci 18:7768–7778CrossRefPubMedPubMedCentral
go back to reference Parent JM, Yu TW, Leibowitz RT et al (1997) Dentate granule cell neurogenesis is increased by seizures and contributes to aberrant network reorganization in the adult rat hippocampus. J Neurosci 17:3727–3738CrossRefPubMedPubMedCentral Parent JM, Yu TW, Leibowitz RT et al (1997) Dentate granule cell neurogenesis is increased by seizures and contributes to aberrant network reorganization in the adult rat hippocampus. J Neurosci 17:3727–3738CrossRefPubMedPubMedCentral
go back to reference Paxinos G, Watson C (2007) The rat brain in stereotaxic coordinates. Elsevier, New York Paxinos G, Watson C (2007) The rat brain in stereotaxic coordinates. Elsevier, New York
go back to reference Platschek S, Cuntz H, Deller T, Jedlicka P (2017) Lesion-induced dendritic remodeling as a new mechanism of homeostatic structural plasticity in the adult brain. In: Van Ooyen A, Butz-Ostendorf M (eds) The rewiring brain: a computational approach to structural plasticity in the adult brain. Academic Press, San Diego, pp 203–218CrossRef Platschek S, Cuntz H, Deller T, Jedlicka P (2017) Lesion-induced dendritic remodeling as a new mechanism of homeostatic structural plasticity in the adult brain. In: Van Ooyen A, Butz-Ostendorf M (eds) The rewiring brain: a computational approach to structural plasticity in the adult brain. Academic Press, San Diego, pp 203–218CrossRef
go back to reference Scharfman HE, Goodman JH, Sollas AL (2000) Granule-like neurons at the hilar/CA3 border after status epilepticus and their synchrony with area CA3 pyramidal cells: functional implications of seizure-induced neurogenesis. J Neurosci 20:6144–6158CrossRefPubMedPubMedCentral Scharfman HE, Goodman JH, Sollas AL (2000) Granule-like neurons at the hilar/CA3 border after status epilepticus and their synchrony with area CA3 pyramidal cells: functional implications of seizure-induced neurogenesis. J Neurosci 20:6144–6158CrossRefPubMedPubMedCentral
Metadata
Title
Memory retrieval-induced activation of adult-born neurons generated in response to damage to the dentate gyrus
Authors
Andrea Aguilar-Arredondo
Angélica Zepeda
Publication date
01-07-2018
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 6/2018
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-018-1664-7

Other articles of this Issue 6/2018

Brain Structure and Function 6/2018 Go to the issue