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García-González D, Dumitru I, Zuccotti A, Yen TY, Herranz-Pérez V, Tan LL, Neitz A, García-Verdugo JM, Kuner R, Alfonso J, Monyer H. Correction: Neurogenesis of medium spiny neurons in the nucleus accumbens continues into adulthood and is enhanced by pathological pain. Mol Psychiatry 2021; 26:7851. [PMID: 34099875 PMCID: PMC8873006 DOI: 10.1038/s41380-021-01177-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Diego García-González
- grid.7497.d0000 0004 0492 0584Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany ,grid.5254.60000 0001 0674 042XPresent Address: Biotech Research and Innovation Centre (BRIC), Faculty of Health, University of Copenhagen, Copenhagen, Denmark
| | - Ionut Dumitru
- grid.7497.d0000 0004 0492 0584Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany ,grid.4714.60000 0004 1937 0626Present Address: Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden
| | - Annalisa Zuccotti
- grid.7497.d0000 0004 0492 0584Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany
| | - Ting-Yun Yen
- grid.7497.d0000 0004 0492 0584Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany ,grid.28665.3f0000 0001 2287 1366Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei, Taiwan
| | - Vicente Herranz-Pérez
- grid.5338.d0000 0001 2173 938XLaboratory of Comparative Neurobiology, Cavanilles Institute, University of Valencia, CIBERNED, Valencia, Spain ,grid.9612.c0000 0001 1957 9153Predepartamental Unit of Medicine, Faculty of Health Sciences, Universitat Jaume I, Castelló de la Plana, Spain
| | - Linette Liqi Tan
- grid.7700.00000 0001 2190 4373Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
| | - Angela Neitz
- grid.7497.d0000 0004 0492 0584Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany
| | - José Manuel García-Verdugo
- grid.5338.d0000 0001 2173 938XLaboratory of Comparative Neurobiology, Cavanilles Institute, University of Valencia, CIBERNED, Valencia, Spain
| | - Rohini Kuner
- grid.7700.00000 0001 2190 4373Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
| | - Julieta Alfonso
- Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany.
| | - Hannah Monyer
- Department of Clinical Neurobiology, University Hospital Heidelberg and German Cancer Research Center, Heidelberg, Germany.
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Gil M, Ancau M, Schlesiger MI, Neitz A, Allen K, De Marco RJ, Monyer H. Impaired path integration in mice with disrupted grid cell firing. Nat Neurosci 2017; 21:81-91. [DOI: 10.1038/s41593-017-0039-3] [Citation(s) in RCA: 76] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 11/01/2017] [Indexed: 11/09/2022]
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Dumitru I, Neitz A, Alfonso J, Monyer H. Diazepam Binding Inhibitor Promotes Stem Cell Expansion Controlling Environment-Dependent Neurogenesis. Neuron 2017; 94:125-137.e5. [PMID: 28343864 DOI: 10.1016/j.neuron.2017.03.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 01/06/2017] [Accepted: 03/01/2017] [Indexed: 12/31/2022]
Abstract
Plasticity of adult neurogenesis supports adaptation to environmental changes. The identification of molecular mediators that signal these changes to neural progenitors in the niche has remained elusive. Here we report that diazepam binding inhibitor (DBI) is crucial in supporting an adaptive mechanism in response to changes in the environment. We provide evidence that DBI is expressed in stem cells in all neurogenic niches of the postnatal brain. Focusing on the hippocampal subgranular zone (SGZ) and employing multiple genetic manipulations in vivo, we demonstrate that DBI regulates the balance between preserving the stem cell pool and neurogenesis. Specifically, DBI dampens GABA activity in stem cells, thereby sustaining the proproliferative effect of physical exercise and enriched environment. Our data lend credence to the notion that the modulatory effect of DBI constitutes a general mechanism that regulates postnatal neurogenesis.
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Affiliation(s)
- Ionut Dumitru
- Department of Clinical Neurobiology at the German Cancer Research Center (DKFZ) and the Medical Faculty of the Heidelberg University, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Angela Neitz
- Department of Clinical Neurobiology at the German Cancer Research Center (DKFZ) and the Medical Faculty of the Heidelberg University, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Julieta Alfonso
- Department of Clinical Neurobiology at the German Cancer Research Center (DKFZ) and the Medical Faculty of the Heidelberg University, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
| | - Hannah Monyer
- Department of Clinical Neurobiology at the German Cancer Research Center (DKFZ) and the Medical Faculty of the Heidelberg University, Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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Fuchs EC, Neitz A, Pinna R, Melzer S, Caputi A, Monyer H. Local and Distant Input Controlling Excitation in Layer II of the Medial Entorhinal Cortex. Neuron 2015; 89:194-208. [PMID: 26711115 PMCID: PMC4712190 DOI: 10.1016/j.neuron.2015.11.029] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/14/2015] [Accepted: 10/30/2015] [Indexed: 11/18/2022]
Abstract
Layer II (LII) of the medial entorhinal cortex (MEC) comprises grid cells that support spatial navigation. The firing pattern of grid cells might be explained by attractor dynamics in a network, which requires either direct excitatory connectivity between phase-specific grid cells or indirect coupling via interneurons. However, knowledge regarding local networks that support in vivo activity is incomplete. Here we identified essential components of LII networks in the MEC. We distinguished four types of excitatory neurons that exhibit cell-type-specific local excitatory and inhibitory connectivity. Furthermore, we found that LII neurons contribute to the excitation of contralateral neurons in the corresponding layer. Finally, we demonstrated that the medial septum controls excitation in the MEC via two subpopulations of long-range GABAergic neurons that target distinct interneurons in LII, thereby disinhibiting local circuits. We thus identified local connections that could support attractor dynamics and external inputs that likely govern excitation in LII. LII MEC excitatory neurons can be classified into four cell types The four cell types exhibit specific local excitatory and inhibitory connectivity LII neurons contribute to the excitation of contralateral LII neurons Distinct septal GABAergic neurons exhibit cell-type-specific inhibition in LII MEC
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Affiliation(s)
- Elke C Fuchs
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Angela Neitz
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Roberta Pinna
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Sarah Melzer
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Antonio Caputi
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Hannah Monyer
- Department of Clinical Neurobiology, Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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Imbrosci B, Neitz A, Mittmann T. Focal cortical lesions induce bidirectional changes in the excitability of fast spiking and non fast spiking cortical interneurons. PLoS One 2014; 9:e111105. [PMID: 25347396 PMCID: PMC4210267 DOI: 10.1371/journal.pone.0111105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 09/28/2014] [Indexed: 11/29/2022] Open
Abstract
A physiological brain function requires neuronal networks to operate within a well-defined range of activity. Indeed, alterations in neuronal excitability have been associated with several pathological conditions, ranging from epilepsy to neuropsychiatric disorders. Changes in inhibitory transmission are known to play a key role in the development of hyperexcitability. However it is largely unknown whether specific interneuronal subpopulations contribute differentially to such pathological condition. In the present study we investigated functional alterations of inhibitory interneurons embedded in a hyperexcitable cortical circuit at the border of chronically induced focal lesions in mouse visual cortex. Interestingly, we found opposite alterations in the excitability of non fast-spiking (Non Fs) and fast-spiking (Fs) interneurons in acute cortical slices from injured animals. Non Fs interneurons displayed a depolarized membrane potential and a higher frequency of spontaneous excitatory postsynaptic currents (sEPSCs). In contrast, Fs interneurons showed a reduced sEPSCs amplitude. The observed downscaling of excitatory synapses targeting Fs interneurons may prevent the recruitment of this specific population of interneurons to the hyperexcitable network. This mechanism is likely to seriously affect neuronal network function and to exacerbate hyperexcitability but it may be important to protect this particular vulnerable population of GABAegic neurons from excitotoxicity.
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Affiliation(s)
- Barbara Imbrosci
- Institute of Physiology, University Medical Center of the Johannes-Gutenberg University Mainz, Mainz, Germany
- * E-mail: (BI); (TM)
| | - Angela Neitz
- Institute of Physiology, University Medical Center of the Johannes-Gutenberg University Mainz, Mainz, Germany
| | - Thomas Mittmann
- Institute of Physiology, University Medical Center of the Johannes-Gutenberg University Mainz, Mainz, Germany
- * E-mail: (BI); (TM)
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Neitz A, Mergia E, Imbrosci B, Petrasch-Parwez E, Eysel UT, Koesling D, Mittmann T. Postsynaptic NO/cGMP increases NMDA receptor currents via hyperpolarization-activated cyclic nucleotide-gated channels in the hippocampus. ACTA ACUST UNITED AC 2013; 24:1923-36. [PMID: 23448871 DOI: 10.1093/cercor/bht048] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The nitric oxide (NO)/cyclic guanosine monophosphate (cGMP) signaling cascade participates in the modulation of synaptic transmission. The effects of NO are mediated by the NO-sensitive cGMP-forming guanylyl cyclases (NO-GCs), which exist in 2 isoforms with indistinguishable regulatory properties. The lack of long-term potentiation (LTP) in knock-out (KO) mice deficient in either one of the NO-GC isoforms indicates the contribution of both NO-GCs to LTP. Recently, we showed that the NO-GC1 isoform is located presynaptically in glutamatergic neurons and increases the glutamate release via hyperpolarization-activated cyclic nucleotide (HCN)-gated channels in the hippocampus. Electrophysiological analysis of hippocampal CA1 neurons in whole-cell recordings revealed a reduction of HCN currents and a hyperpolarizing shift of the activation curve in the NO-GC2 KOs associated with reduced resting membrane potentials. These features were mimicked in wild-type (WT) neurons with an NO-GC inhibitor. Analysis of glutamate receptors revealed a cGMP-dependent reduction of NMDA receptor currents in the NO-GC2 KO mice, which was mimicked in WT by HCN channel inhibition. Lowering extracellular Mg(2+) increased NMDA receptor currents in the NO-GC2 KO and allowed the induction of LTP that was absent at physiological Mg(2+). In sum, our data indicate that postsynaptic cGMP increases the N-methyl-D-aspartate (NMDA) receptor current by gating HCN channels and thereby is required for LTP.
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Affiliation(s)
- Angela Neitz
- Institute of Physiology and Pathophysiology, University Medical Center of the Johannes-Gutenberg University, D-55128 Mainz, Germany and
| | | | - Barbara Imbrosci
- Institute of Physiology and Pathophysiology, University Medical Center of the Johannes-Gutenberg University, D-55128 Mainz, Germany and
| | | | - Ulf T Eysel
- Department of Experimental Neurophysiology, Ruhr-Universität Bochum, D-44780 Bochum, Germany
| | | | - Thomas Mittmann
- Institute of Physiology and Pathophysiology, University Medical Center of the Johannes-Gutenberg University, D-55128 Mainz, Germany and
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Koesling D, Neitz A, Mittmann T, Mergia E. NO/cGMP signalling in hippocampal glutamatergic neurons. Nitric Oxide 2012. [DOI: 10.1016/j.niox.2012.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Schönle I, Neitz A, Mittmann T, Koesling D, Mergia E. PDE2, a component of the NO/cGMP signalling in the hippocampus. BMC Pharmacol 2011. [PMCID: PMC3363260 DOI: 10.1186/1471-2210-11-s1-p63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Neitz A, Mergia E, Eysel UT, Koesling D, Mittmann T. Presynaptic nitric oxide/cGMP facilitates glutamate release via hyperpolarization-activated cyclic nucleotide-gated channels in the hippocampus. Eur J Neurosci 2011; 33:1611-21. [PMID: 21410795 DOI: 10.1111/j.1460-9568.2011.07654.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In hippocampal neurons, synaptic transmission is affected by a variety of modulators, including nitric oxide (NO), which was proposed as a retrograde messenger as long as two decades ago. NO signals via two NO-sensitive guanylyl cyclases (NO-GCs) (NO-GC1 and NO-GC2) and the subsequent increase in cGMP. Lack of long-term potentiation in mice deficient in either one of the two NO-GCs demonstrates the involvement of both NO-GCs in synaptic transmission. However, the physiological consequences of NO/cGMP and the cellular mechanisms involved are unknown. Here, we analyzed glutamatergic synaptic transmission, most likely reflecting glutamate release, in the hippocampal CA1 region of NO-GC knockout mice by single-cell recording, and found glutamate release to be reduced under basal and stimulated conditions in the NO-GC1 knockout mice, but restorable to wild-type-like levels with a cGMP analog. Conversely, an inhibitor of NO/cGMP signaling, ODQ, reduced glutamate release in wild-type mice to knockout-like levels; thus, we conclude that presynaptic cGMP formed by NO-GC1 facilitates glutamate release. In this pathway, NO is supplied by endothelial NO synthase. In search of a cGMP target, we found that two mechanistically distinct blockers of hyperpolarization-activated cyclic nucleotide-gated (HCN) channels (ZD7288 and DK-AH269) abolished the cGMP-induced increase in glutamate release, suggesting that cGMP either directly or indirectly signals via HCN channels. In summary, we unravel a presynaptic role of NO/cGMP most likely in glutamate release and propose that HCN channels act as effectors for cGMP.
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Affiliation(s)
- Angela Neitz
- Department of Neurophysiology, Medical School, Ruhr-University Bochum, Germany
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Sirko S, Neitz A, Mittmann T, Horvat-Bröcker A, von Holst A, Eysel UT, Faissner A. Focal laser-lesions activate an endogenous population of neural stem/progenitor cells in the adult visual cortex. ACTA ACUST UNITED AC 2009; 132:2252-64. [PMID: 19286696 DOI: 10.1093/brain/awp043] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CNS lesions stimulate adult neurogenic niches. Endogenous neural stem/progenitor cells represent a potential resource for CNS regeneration. Here, we investigate the response to unilateral focal laser-lesions applied to the visual cortex of juvenile rats. Within 3 days post-lesion, an ipsilateral increase of actively cycling cells was observed in cortical layer one and in the callosal white matter within the lesion penumbra. The cells expressed the neural stem/progenitor cell marker Nestin and the 473HD-epitope. Tissue prepared from the lesion area by micro-dissection generated self-renewing, multipotent neurospheres, while cells from the contralateral visual cortex did not. The newly formed neural stem/progenitor cells in the lesion zone might support neurogenesis, as suggested by the expression of Pax6 and Doublecortin, a marker of newborn neurons. We propose that focal laser-lesions may induce the emergence of stem/progenitor cells with neurogenic potential. This could underlie the beneficial effects of laser application in neurosurgery.
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Affiliation(s)
- Swetlana Sirko
- Faculty of Biology and Biotechnology, Ruhr-University Bochum, Universitaetsstrasse, Bochum, Germany
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Hargus G, Kist R, Kramer J, Gerstel D, Neitz A, Scherer G, Rohwedel J. Loss of Sox9 function results in defective chondrocyte differentiation of mouse embryonic stem cells in vitro. Int J Dev Biol 2008; 52:323-32. [PMID: 18415932 DOI: 10.1387/ijdb.072490gh] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The transcription factor Sox9 plays an important role during chondrogenesis. After early conditional inactivation of Sox9 in mesenchymal limb bud cells of mice, mesenchymal condensations as well as cartilage and bone are completely absent in the developing limbs. We analyzed chondrogenic differentiation of Sox9-/- mouse embryonic stem cells in vitro, using two clones with different targeted mutations. We found that the development of mature and hypertrophic chondrocytes is completely inhibited in the absence of Sox9 confirming that Sox9 is required for the formation of cartilage. In contrast, Sox9+/- mouse embryonic stem cells showed continuous but reduced differentiation into mature chondrocytes. Interestingly, the formation of early chondrogenic condensations expressing characteristic marker genes such as scleraxis, Sox5 and Sox6 was not inhibited in the absence of Sox9 in vitro. Thus, we propose that the earliest step of chondrogenesis could be regulated by a non cell-autonomous function of Sox9.
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Affiliation(s)
- Gunnar Hargus
- Dept. of Medical Molecular Biology, University of Lubeck, Lubeck, Germany
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