1
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Nagase M, Nagashima T, Hamada S, Morishima M, Tohyama S, Arima-Yoshida F, Hiyoshi K, Hirano T, Ohtsuka T, Watabe AM. All-optical presynaptic plasticity induction by photoactivated adenylyl cyclase targeted to axon terminals. Cell Rep Methods 2024; 4:100740. [PMID: 38521059 PMCID: PMC11045876 DOI: 10.1016/j.crmeth.2024.100740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 10/08/2023] [Accepted: 02/28/2024] [Indexed: 03/25/2024]
Abstract
Intracellular signaling plays essential roles in various cell types. In the central nervous system, signaling cascades are strictly regulated in a spatiotemporally specific manner to govern brain function; for example, presynaptic cyclic adenosine monophosphate (cAMP) can enhance the probability of neurotransmitter release. In the last decade, channelrhodopsin-2 has been engineered for subcellular targeting using localization tags, but optogenetic tools for intracellular signaling are not well developed. Therefore, we engineered a selective presynaptic fusion tag for photoactivated adenylyl cyclase (bPAC-Syn1a) and found its high localization at presynaptic terminals. Furthermore, an all-optical electrophysiological method revealed rapid and robust short-term potentiation by bPAC-Syn1a at brain stem-amygdala synapses in acute brain slices. Additionally, bPAC-Syn1a modulated mouse immobility behavior. These results indicate that bPAC-Syn1a can manipulate presynaptic cAMP signaling in vitro and in vivo. The all-optical manipulation technique developed in this study can help further elucidate the dynamic regulation of various cellular functions.
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Affiliation(s)
- Masashi Nagase
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Takashi Nagashima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Shun Hamada
- Department of Biochemistry, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
| | - Mieko Morishima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Suguru Tohyama
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Fumiko Arima-Yoshida
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Kanae Hiyoshi
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan
| | - Tomoha Hirano
- Department of Biochemistry, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
| | - Toshihisa Ohtsuka
- Department of Biochemistry, Faculty of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan.
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba 277-8567, Japan.
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2
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Kim YJ, Tohyama S, Nagashima T, Nagase M, Hida Y, Hamada S, Watabe AM, Ohtsuka T. A light-controlled phospholipase C for imaging of lipid dynamics and controlling neural plasticity. Cell Chem Biol 2024:S2451-9456(24)00090-4. [PMID: 38582083 DOI: 10.1016/j.chembiol.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 10/25/2023] [Revised: 02/05/2024] [Accepted: 03/12/2024] [Indexed: 04/08/2024]
Abstract
Phospholipase C (PLC) is a key enzyme that regulates physiological processes via lipid and calcium signaling. Despite advances in protein engineering, no tools are available for direct PLC control. Here, we developed a novel optogenetic tool, light-controlled PLCβ (opto-PLCβ). Opto-PLCβ uses a light-induced dimer module, which directs an engineered PLC to the plasma membrane in a light-dependent manner. Our design includes an autoinhibitory capacity, ensuring stringent control over PLC activity. Opto-PLCβ triggers reversible calcium responses and lipid dynamics in a restricted region, allowing precise spatiotemporal control of PLC signaling. Using our system, we discovered that phospholipase D-mediated phosphatidic acid contributes to diacylglycerol clearance on the plasma membrane. Moreover, we extended its applicability in vivo, demonstrating that opto-PLCβ can enhance amygdala synaptic plasticity and associative fear learning in mice. Thus, opto-PLCβ offers precise spatiotemporal control, enabling comprehensive investigation of PLC-mediated signaling pathways, lipid dynamics, and their physiological consequences in vivo.
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Affiliation(s)
- Yeon-Jeong Kim
- Department of Biochemistry, Graduate School of Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan
| | - Suguru Tohyama
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Takashi Nagashima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Masashi Nagase
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Yamato Hida
- Department of Biochemistry, Graduate School of Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan
| | - Shun Hamada
- Department of Biochemistry, Graduate School of Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan.
| | - Toshihisa Ohtsuka
- Department of Biochemistry, Graduate School of Medicine, Faculty of Medicine, University of Yamanashi, 1110 Shimokato, Chuo, Yamanashi 409-3898, Japan.
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3
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Morishima M, Matsumura S, Tohyama S, Nagashima T, Konno A, Hirai H, Watabe AM. Excitatory subtypes of the lateral amygdala neurons are differentially involved in regulation of synaptic plasticity and excitation/inhibition balance in aversive learning in mice. Front Cell Neurosci 2023; 17:1292822. [PMID: 38162000 PMCID: PMC10755964 DOI: 10.3389/fncel.2023.1292822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/06/2023] [Indexed: 01/03/2024] Open
Abstract
The amygdala plays a crucial role in aversive learning. In Pavlovian fear conditioning, sensory information about an emotionally neutral conditioned stimulus (CS) and an innately aversive unconditioned stimulus is associated with the lateral amygdala (LA), and the CS acquires the ability to elicit conditioned responses. Aversive learning induces synaptic plasticity in LA excitatory neurons from CS pathways, such as the medial geniculate nucleus (MGN) of the thalamus. Although LA excitatory cells have traditionally been classified based on their firing patterns, the relationship between the subtypes and functional properties remains largely unknown. In this study, we classified excitatory cells into two subtypes based on whether the after-depolarized potential (ADP) amplitude is expressed in non-ADP cells and ADP cells. Their electrophysiological properties were significantly different. We examined subtype-specific synaptic plasticity in the MGN-LA pathway following aversive learning using optogenetics and found significant experience-dependent plasticity in feed-forward inhibitory responses in fear-conditioned mice compared with control mice. Following aversive learning, the inhibition/excitation (I/E) balance in ADP cells drastically changed, whereas that in non-ADP cells tended to change in the reverse direction. These results suggest that the two LA subtypes are differentially regulated in relation to synaptic plasticity and I/E balance during aversive learning.
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Affiliation(s)
- Mieko Morishima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Sohta Matsumura
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Suguru Tohyama
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Takashi Nagashima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Ayumu Konno
- Gunma University Graduate School of Medicine, Maebashi, Japan
- Viral Vector Core, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Japan
| | - Hirokazu Hirai
- Gunma University Graduate School of Medicine, Maebashi, Japan
- Viral Vector Core, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Japan
| | - Ayako M. Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
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4
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Nagashima T, Mikami K, Tohyama S, Konno A, Hirai H, Watabe AM. State-dependent modulation of positive and negative affective valences by a parabrachial nucleus-to-ventral tegmental area pathway in mice. Front Neural Circuits 2023; 17:1273322. [PMID: 38094239 PMCID: PMC10716301 DOI: 10.3389/fncir.2023.1273322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Appropriately responding to various sensory signals in the environment is essential for animal survival. Accordingly, animal behaviors are closely related to external and internal states, which include the positive and negative emotional values of sensory signals triggered by environmental factors. While the lateral parabrachial nucleus (LPB) plays a key role in nociception and supports negative valences, it also transmits signals including positive valences. However, the downstream neuronal mechanisms of positive and negative valences have not been fully explored. In the present study, we investigated the ventral tegmental area (VTA) as a projection target for LPB neurons. Optogenetic activation of LPB-VTA terminals in male mice elicits positive reinforcement in an operant task and induces both avoidance and attraction in a place-conditioning task. Inhibition of glutamic acid decarboxylase (GAD) 65-expressing cells in the VTA promotes avoidance behavior induced by photoactivation of the LPB-VTA pathway. These findings indicate that the LPB-VTA pathway is one of the LPB outputs for the transmission of positive and negative valence signals, at least in part, with GABAergic modification in VTA.
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Affiliation(s)
- Takashi Nagashima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Kaori Mikami
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Suguru Tohyama
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
| | - Ayumu Konno
- Gunma University Graduate School of Medicine, Maebashi, Japan
- Viral Vector Core, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Japan
| | - Hirokazu Hirai
- Gunma University Graduate School of Medicine, Maebashi, Japan
- Viral Vector Core, Gunma University Initiative for Advanced Research (GIAR), Maebashi, Japan
| | - Ayako M. Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Chiba, Japan
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5
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Hamada S, Mikami K, Ueda S, Nagase M, Nagashima T, Yamamoto M, Bito H, Takemoto-Kimura S, Ohtsuka T, Watabe AM. Experience-dependent changes in affective valence of taste in male mice. Mol Brain 2023; 16:28. [PMID: 36906607 PMCID: PMC10007816 DOI: 10.1186/s13041-023-01017-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 03/03/2023] [Indexed: 03/13/2023] Open
Abstract
Taste plays an essential role in the evaluation of food quality by detecting potential harm and benefit in what animals are about to eat and drink. While the affective valence of taste signals is supposed to be innately determined, taste preference can also be drastically modified by previous taste experiences of the animals. However, how the experience-dependent taste preference is developed and the neuronal mechanisms involved in this process are poorly understood. Here, we investigate the effects of prolonged exposure to umami and bitter tastants on taste preference using two-bottle tests in male mice. Prolonged umami exposure significantly enhanced umami preference with no changes in bitter preference, while prolonged bitter exposure significantly decreased bitter avoidance with no changes in umami preference. Because the central amygdala (CeA) is postulated as a critical node for the valence processing of sensory information including taste, we examined the responses of cells in the CeA to sweet, umami, and bitter tastants using in vivo calcium imaging. Interestingly, both protein kinase C delta (Prkcd)-positive and Somatostatin (Sst)-positive neurons in the CeA showed an umami response comparable to the bitter response, and no difference in cell type-specific activity patterns to different tastants was observed. Meanwhile, fluorescence in situ hybridization with c-Fos antisense probe revealed that a single umami experience significantly activates the CeA and several other gustatory-related nuclei, and especially CeA Sst-positive neurons were strongly activated. Intriguingly, after prolonged umami experience, umami tastant also significantly activates the CeA neurons, but the Prkcd-positive neurons instead of Sst-positive neurons were highly activated. These results suggest a relationship between amygdala activity and experience-dependent plasticity developed in taste preference and the involvement of the genetically defined neural populations in this process.
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Affiliation(s)
- Shun Hamada
- Department of Biochemistry, Faculty of Medicine, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Kaori Mikami
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwashita, Kashiwa, Chiba, 277-8567, Japan
| | - Shuhei Ueda
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, 464-8601, Japan.,Department of Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Masashi Nagase
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwashita, Kashiwa, Chiba, 277-8567, Japan
| | - Takashi Nagashima
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwashita, Kashiwa, Chiba, 277-8567, Japan
| | - Mikiyasu Yamamoto
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, 464-8601, Japan.,Department of Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Haruhiko Bito
- Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Sayaka Takemoto-Kimura
- Department of Neuroscience I, Research Institute of Environmental Medicine, Nagoya University, Nagoya, 464-8601, Japan.,Department of Molecular/Cellular Neuroscience, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Toshihisa Ohtsuka
- Department of Biochemistry, Faculty of Medicine, University of Yamanashi, Yamanashi, 409-3898, Japan
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwashita, Kashiwa, Chiba, 277-8567, Japan.
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6
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Tsunogai T, Ohashi T, Shimada Y, Higuchi T, Kimura A, Watabe AM, Kato F, Ida H, Kobayashi H. Hematopoietic stem cell gene therapy ameliorates CNS involvement in murine model of GM1-gangliosidosis. Mol Ther Methods Clin Dev 2022; 27:89. [PMID: 36186953 PMCID: PMC9508272 DOI: 10.1016/j.omtm.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Ito M, Nagase M, Tohyama S, Mikami K, Kato F, Watabe AM. The parabrachial-to-amygdala pathway provides aversive information to induce avoidance behavior in mice. Mol Brain 2021; 14:94. [PMID: 34167570 PMCID: PMC8223383 DOI: 10.1186/s13041-021-00807-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 06/10/2021] [Indexed: 11/10/2022] Open
Abstract
The neuronal circuitry for pain signals has been intensively studied for decades. The external lateral parabrachial nucleus (PB) was shown to play a crucial role in nociceptive information processing. Previous work, including ours, has demonstrated that stimulating the neuronal pathway from the PB to the central region of the amygdala (CeA) can substitute for an actual pain signal to drive an associative form of threat/fear memory formation. However, it is still unknown whether activation of the PB-CeA pathway can directly drive avoidance behavior, escape behavior, or only acts as strategic freezing behavior for later memory retrieval. To directly address this issue, we have developed a real-time Y-maze conditioning behavioral paradigm to examine avoidance behavior induced by optogenetic stimulation of the PB-CeA pathway. In this current study, we have demonstrated that the PB-CeA pathway carries aversive information that can directly trigger avoidance behavior and thereby serve as an alarm signal to induce adaptive behaviors for later decision-making.
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Affiliation(s)
- Mariko Ito
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8567, Japan
- Department of Anesthesiology, The Jikei University School of Medicine, Tokyo, Japan
| | - Masashi Nagase
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8567, Japan
| | - Suguru Tohyama
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8567, Japan
| | - Kaori Mikami
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8567, Japan
| | - Fusao Kato
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, 163-1 Kashiwa-shita, Kashiwa, Chiba, 277-8567, Japan.
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8
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Miwa S, Watabe AM, Shimada Y, Higuchi T, Kobayashi H, Fukuda T, Kato F, Ida H, Ohashi T. Efficient engraftment of genetically modified cells is necessary to ameliorate central nervous system involvement of murine model of mucopolysaccharidosis type II by hematopoietic stem cell targeted gene therapy. Mol Genet Metab 2020; 130:262-273. [PMID: 32631737 DOI: 10.1016/j.ymgme.2020.06.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/12/2020] [Accepted: 06/12/2020] [Indexed: 10/24/2022]
Abstract
Mucopolysaccharidosis type II (MPS II) is a lysosomal storage disease (LSD) caused by a deficiency of the iduronate-2-sulfatase (IDS) that catabolizes glycosaminoglycans (GAGs). Abnormal accumulations of GAGs in somatic cells lead to various manifestations including central nervous system (CNS) disease. Enzyme replacement therapy (ERT) and hematopoietic stem cell transplantation (HSCT) are the currently available therapy for MPS II, but both therapies fail to improve CNS manifestations. We previously showed that hematopoietic stem cell targeted gene therapy (HSC-GT) with lethal irradiation improved CNS involvement in a murine model of MPS II which lacks the gene coding for IDS. However, the strong preconditioning, with lethal irradiation, would cause a high rate of morbidity and mortality. Therefore, we tested milder preconditioning procedures with either low dose irradiation or low dose irradiation plus an anti c-kit monoclonal antibody (ACK2) to assess CNS effects in mice with MPS II after HSC-GT. Mice from all the HSC-GT groups displayed super-physiological levels of IDS enzyme activity and robust reduction of abnormally accumulated GAGs to the wild type mice levels in peripheral organs. However, only the mice treated with lethal irradiation showed significant cognitive function improvement as well as IDS elevation and GAG reduction in the brain. These results suggest that an efficient engraftment of genetically modified cells for HSC-GT requires strong preconditioning to ameliorate CNS involvement in cases with MPS II.
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Affiliation(s)
- Saori Miwa
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan; Department of Pediatrics, The Jikei University School of Medicine, Tokyo, Japan
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Yohta Shimada
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Takashi Higuchi
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Hiroshi Kobayashi
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan; Department of Pediatrics, The Jikei University School of Medicine, Tokyo, Japan
| | - Takahiro Fukuda
- Division of Neuropathology, Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Fusao Kato
- Division of Neuroscience, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
| | - Hiroyuki Ida
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan; Department of Pediatrics, The Jikei University School of Medicine, Tokyo, Japan
| | - Toya Ohashi
- Division of Gene Therapy, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan; Department of Pediatrics, The Jikei University School of Medicine, Tokyo, Japan.
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9
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Matsumura K, Seiriki K, Okada S, Nagase M, Ayabe S, Yamada I, Furuse T, Shibuya H, Yasuda Y, Yamamori H, Fujimoto M, Nagayasu K, Yamamoto K, Kitagawa K, Miura H, Gotoda-Nishimura N, Igarashi H, Hayashida M, Baba M, Kondo M, Hasebe S, Ueshima K, Kasai A, Ago Y, Hayata-Takano A, Shintani N, Iguchi T, Sato M, Yamaguchi S, Tamura M, Wakana S, Yoshiki A, Watabe AM, Okano H, Takuma K, Hashimoto R, Hashimoto H, Nakazawa T. Pathogenic POGZ mutation causes impaired cortical development and reversible autism-like phenotypes. Nat Commun 2020; 11:859. [PMID: 32103003 PMCID: PMC7044294 DOI: 10.1038/s41467-020-14697-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 01/28/2020] [Indexed: 01/26/2023] Open
Abstract
Pogo transposable element derived with ZNF domain (POGZ) has been identified as one of the most recurrently de novo mutated genes in patients with neurodevelopmental disorders (NDDs), including autism spectrum disorder (ASD), intellectual disability and White-Sutton syndrome; however, the neurobiological basis behind these disorders remains unknown. Here, we show that POGZ regulates neuronal development and that ASD-related de novo mutations impair neuronal development in the developing mouse brain and induced pluripotent cell lines from an ASD patient. We also develop the first mouse model heterozygous for a de novo POGZ mutation identified in a patient with ASD, and we identify ASD-like abnormalities in the mice. Importantly, social deficits can be treated by compensatory inhibition of elevated cell excitability in the mice. Our results provide insight into how de novo mutations on high-confidence ASD genes lead to impaired mature cortical network function, which underlies the cellular pathogenesis of NDDs, including ASD. De novo mutations significantly contribute to autism spectrum disorders (ASD). Here, the authors demonstrate that ASD-associated de novo mutations in the POGZ gene, one of a high-confidence ASD gene, lead to ASD-related impaired neuronal development and disrupted mature cortical network function.
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Affiliation(s)
- Kensuke Matsumura
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.,Interdisciplinary Program for Biomedical Sciences, Institute for Transdisciplinary Graduate Degree Programs, Osaka University, Suita, Osaka, 565-0871, Japan.,Research Fellowships for Young Scientists of the Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, 102-0083, Japan
| | - Kaoru Seiriki
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.,Interdisciplinary Program for Biomedical Sciences, Institute for Transdisciplinary Graduate Degree Programs, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Shota Okada
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masashi Nagase
- Institute of Clinical Medicine and Research, Jikei University School of Medicine, Kashiwa, Chiba, 277-8567, Japan
| | - Shinya Ayabe
- Experimental Animal Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Ikuko Yamada
- Technology and Developmental Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Tamio Furuse
- Technology and Developmental Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Hirotoshi Shibuya
- Technology and Developmental Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Yuka Yasuda
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8553, Japan.,Life Grow Brilliant Clinic, Osaka, Osaka, 530-0012, Japan
| | - Hidenaga Yamamori
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8553, Japan.,Japan Community Health care Organization Osaka Hospital, Osaka, Osaka, 553-0003, Japan
| | - Michiko Fujimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8553, Japan.,Department of Psychiatry, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kazuki Nagayasu
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kana Yamamoto
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kohei Kitagawa
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Hiroki Miura
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Nanaka Gotoda-Nishimura
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Hisato Igarashi
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Misuzu Hayashida
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masayuki Baba
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Momoka Kondo
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Shigeru Hasebe
- Department of Pharmacology, Graduate School of Dentistry, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Kosei Ueshima
- Department of Pharmacology, Graduate School of Dentistry, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Atsushi Kasai
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yukio Ago
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.,Laboratory of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Atsuko Hayata-Takano
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan.,Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Osaka, 565-0871, Japan
| | - Norihito Shintani
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Tokuichi Iguchi
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Makoto Sato
- Department of Anatomy and Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.,United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Osaka, 565-0871, Japan.,Research Center for Child Mental Development, University of Fukui, Fukui, Fukui, 910-1193, Japan
| | - Shun Yamaguchi
- Department of Morphological Neuroscience, Gifu University Graduate School of Medicine, Gifu, 501-1194, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences, Gifu University, Gifu, 501-1194, Japan
| | - Masaru Tamura
- Technology and Developmental Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Shigeharu Wakana
- Technology and Developmental Team for Mouse Phenotype Analysis, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan.,Department of Gerontology, Institute of Biomedical Research and Innovation, Kobe, Hyogo, 650-0047, Japan
| | - Atsushi Yoshiki
- Experimental Animal Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan
| | - Ayako M Watabe
- Institute of Clinical Medicine and Research, Jikei University School of Medicine, Kashiwa, Chiba, 277-8567, Japan
| | - Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Kazuhiro Takuma
- Department of Pharmacology, Graduate School of Dentistry, Osaka University, Suita, Osaka, 565-0871, Japan.,Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Osaka, 565-0871, Japan
| | - Ryota Hashimoto
- Department of Pathology of Mental Diseases, National Institute of Mental Health, National Center of Neurology and Psychiatry, Kodaira, Tokyo, 187-8553, Japan.,Osaka University, Suita, Osaka, 565-0871, Japan
| | - Hitoshi Hashimoto
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan. .,Molecular Research Center for Children's Mental Development, United Graduate School of Child Development, Osaka University, Kanazawa University, Hamamatsu University School of Medicine, Chiba University and University of Fukui, Suita, Osaka, 565-0871, Japan. .,Division of Bioscience, Institute for Datability Science, Osaka University, Suita, Osaka, 565-0871, Japan. .,Transdimensional Life Imaging Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka, 565-0871, Japan. .,Department of Molecular Pharmaceutical Science, Graduate School of Medicine, Osaka University, Suita, Osaka, 565-0871, Japan.
| | - Takanobu Nakazawa
- Laboratory of Molecular Neuropharmacology, Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, 565-0871, Japan. .,Department of Pharmacology, Graduate School of Dentistry, Osaka University, Suita, Osaka, 565-0871, Japan.
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10
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11
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Miyazawa Y, Takahashi Y, Watabe AM, Kato F. Predominant synaptic potentiation and activation in the right central amygdala are independent of bilateral parabrachial activation in the hemilateral trigeminal inflammatory pain model of rats. Mol Pain 2018; 14:1744806918807102. [PMID: 30270724 PMCID: PMC6243415 DOI: 10.1177/1744806918807102] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Nociceptive signals originating in the periphery are conveyed to the brain through specific afferent and ascending pathways. The spino-(trigemino-)parabrachio-amygdaloid pathway is one of the principal pathways mediating signals from nociception-specific ascending neurons to the central amygdala, a limbic structure involved in aversive signal-associated emotional responses, including the emotional aspects of pain. Recent studies suggest that the right and left central amygdala play distinct roles in the regulation of nociceptive responses. Using a latent formalin inflammatory pain model of the rat, we analyzed the right-left differences in synaptic potentiation at the synapses formed between the fibers from the lateral parabrachial nucleus and central amygdala neurons as well as those in the c-Fos expression in the lateral parabrachial nucleus, central amygdala, and the basolateral/lateral amygdala after formalin injection to either the right or left side of the rat upper lip. Although the single-sided formalin injection caused a significant bilateral increase in c-Fos-expressing neurons in the lateral parabrachial nucleus with slight projection-side dependence, the increase in the amplitude of postsynaptic excitatory currents and the number of c-Fos-expressing neurons in the central amygdala occurred predominantly on the right side regardless of the side of the inflammation. Although there was no significant correlation in the number of c-Fos-expressing neurons between the lateral parabrachial nucleus and central amygdala in the formalin-injected animals, these numbers were significantly correlated between the basolateral amygdala and central amygdala. It is thus concluded that the lateral parabrachial nucleus-central amygdala synaptic potentiation reported in various pain models is not a simple Hebbian plasticity in which raised inputs from the lateral parabrachial nucleus cause lateral parabrachial nucleus-central amygdala potentiation but rather an integrative and adaptive response involving specific mechanisms in the right central amygdala.
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Affiliation(s)
- Yuta Miyazawa
- 1 Department of Neuroscience, Jikei University School of Medicine, Tokyo, Japan.,2 Center for Neuroscience of Pain, Jikei University School of Medicine, Tokyo, Japan
| | - Yukari Takahashi
- 1 Department of Neuroscience, Jikei University School of Medicine, Tokyo, Japan.,2 Center for Neuroscience of Pain, Jikei University School of Medicine, Tokyo, Japan
| | - Ayako M Watabe
- 2 Center for Neuroscience of Pain, Jikei University School of Medicine, Tokyo, Japan.,3 Institute of Clinical Medicine and Research, Jikei University School of Medicine, Tokyo, Japan
| | - Fusao Kato
- 1 Department of Neuroscience, Jikei University School of Medicine, Tokyo, Japan.,2 Center for Neuroscience of Pain, Jikei University School of Medicine, Tokyo, Japan
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12
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Yokose J, Okubo-Suzuki R, Nomoto M, Ohkawa N, Nishizono H, Suzuki A, Matsuo M, Tsujimura S, Takahashi Y, Nagase M, Watabe AM, Sasahara M, Kato F, Inokuchi K. Overlapping memory trace indispensable for linking, but not recalling, individual memories. Science 2017; 355:398-403. [PMID: 28126819 DOI: 10.1126/science.aal2690] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/04/2017] [Indexed: 01/10/2023]
Abstract
Memories are not stored in isolation from other memories but are integrated into associative networks. However, the mechanisms underlying memory association remain elusive. Using two amygdala-dependent behavioral paradigms-conditioned taste aversion (CTA) and auditory-cued fear conditioning (AFC)-in mice, we found that presenting the conditioned stimulus used for the CTA task triggered the conditioned response of the AFC task after natural coreactivation of the memories. This was accompanied through an increase in the overlapping neuronal ensemble in the basolateral amygdala. Silencing of the overlapping ensemble suppressed CTA retrieval-induced freezing. However, retrieval of the original CTA or AFC memory was not affected. A small population of coshared neurons thus mediates the link between memories. They are not necessary for recalling individual memories.
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Affiliation(s)
- Jun Yokose
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Reiko Okubo-Suzuki
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Masanori Nomoto
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Noriaki Ohkawa
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Hirofumi Nishizono
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Division of Animal Experimental Laboratory, Life Science Research Centre, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Akinobu Suzuki
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Mina Matsuo
- Division of Animal Experimental Laboratory, Life Science Research Centre, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Shuhei Tsujimura
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yukari Takahashi
- Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Masashi Nagase
- Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Ayako M Watabe
- Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Masakiyo Sasahara
- Department of Pathology, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Fusao Kato
- Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan
| | - Kaoru Inokuchi
- Department of Biochemistry, Faculty of Medicine, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan. .,Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency (JST), University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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13
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Shinohara K, Watabe AM, Nagase M, Okutsu Y, Takahashi Y, Kurihara H, Kato F. Essential role of endogenous calcitonin gene-related peptide in pain-associated plasticity in the central amygdala. Eur J Neurosci 2017; 46:2149-2160. [PMID: 28833700 PMCID: PMC5698701 DOI: 10.1111/ejn.13662] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 08/04/2017] [Accepted: 08/14/2017] [Indexed: 12/16/2022]
Abstract
The role of the neuropeptide calcitonin gene‐related peptide (CGRP) is well established in nociceptive behaviors. CGRP is highly expressed in the projection pathway from the parabrachial nucleus to the laterocapsular region of the central amygdala (CeC), which plays a critical role in relaying nociceptive information. The CeC is a key structure in pain behavior because it integrates and modulates nociceptive information along with other sensory signals. Previous studies have demonstrated that blockade of the amygdalar CGRP‐signaling cascade attenuates nociceptive behaviors in pain models, while CGRP application facilitates amygdalar synaptic transmission and induces pain behaviors. Despite these lines of evidence, it remains unclear whether endogenous CGRP is involved in the development of nociceptive behaviors accompanied with amygdalar plasticity in a peripheral inflammation model in vivo. To directly address this, we utilized a previously generated CGRP knockout (KO) mouse to longitudinally study formalin‐induced plasticity and nociceptive behavior. We found that synaptic potentiation in the right PB‐CeC pathway that was observed in wild‐type mice was drastically attenuated in the CGRP KO mice 6 h post‐inflammation, when acute nociceptive behavior was no longer observed. Furthermore, the bilateral tactile allodynia 6 h post‐inflammation was significantly decreased in the CGRP KO mice. In contrast, the acute nociceptive behavior immediately after the formalin injection was reduced only at 20–25 min post‐injection in the CGRP KO mice. These results suggest that endogenous CGRP contributes to peripheral inflammation‐induced synaptic plasticity in the amygdala, and this plasticity may underlie the exaggerated nociception–emotion linkage in pain chronification.
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Affiliation(s)
- Kei Shinohara
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Department of Orthopaedic Surgery, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Ayako M Watabe
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Masashi Nagase
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Yuya Okutsu
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Department of Orthopaedic Surgery, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Yukari Takahashi
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Hiroki Kurihara
- Department of Molecular Cell Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Fusao Kato
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan.,Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
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14
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Shinohara K, Watabe AM, Nagase M, Okutsu Y, Takahashi Y, Kurihara H, Kato F. Essential role of endogenous calcitonin gene-related peptide in pain-associated plasticity in the central amygdala. Eur J Neurosci 2017. [PMID: 28833700 DOI: 10.1111/ejn.2017.46.issue-610.1111/ejn.13662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
The role of the neuropeptide calcitonin gene-related peptide (CGRP) is well established in nociceptive behaviors. CGRP is highly expressed in the projection pathway from the parabrachial nucleus to the laterocapsular region of the central amygdala (CeC), which plays a critical role in relaying nociceptive information. The CeC is a key structure in pain behavior because it integrates and modulates nociceptive information along with other sensory signals. Previous studies have demonstrated that blockade of the amygdalar CGRP-signaling cascade attenuates nociceptive behaviors in pain models, while CGRP application facilitates amygdalar synaptic transmission and induces pain behaviors. Despite these lines of evidence, it remains unclear whether endogenous CGRP is involved in the development of nociceptive behaviors accompanied with amygdalar plasticity in a peripheral inflammation model in vivo. To directly address this, we utilized a previously generated CGRP knockout (KO) mouse to longitudinally study formalin-induced plasticity and nociceptive behavior. We found that synaptic potentiation in the right PB-CeC pathway that was observed in wild-type mice was drastically attenuated in the CGRP KO mice 6 h post-inflammation, when acute nociceptive behavior was no longer observed. Furthermore, the bilateral tactile allodynia 6 h post-inflammation was significantly decreased in the CGRP KO mice. In contrast, the acute nociceptive behavior immediately after the formalin injection was reduced only at 20-25 min post-injection in the CGRP KO mice. These results suggest that endogenous CGRP contributes to peripheral inflammation-induced synaptic plasticity in the amygdala, and this plasticity may underlie the exaggerated nociception-emotion linkage in pain chronification.
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Affiliation(s)
- Kei Shinohara
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Department of Orthopaedic Surgery, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Ayako M Watabe
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Masashi Nagase
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Yuya Okutsu
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Department of Orthopaedic Surgery, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Yukari Takahashi
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
| | - Hiroki Kurihara
- Department of Molecular Cell Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Fusao Kato
- Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Center for Neuroscience of Pain, Jikei University School of Medicine, Minato-ku, Tokyo, Japan
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15
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Sugimura YK, Takahashi Y, Watabe AM, Kato F. Synaptic and network consequences of monosynaptic nociceptive inputs of parabrachial nucleus origin in the central amygdala. J Neurophysiol 2016; 115:2721-39. [PMID: 26888105 PMCID: PMC4922599 DOI: 10.1152/jn.00946.2015] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 02/15/2016] [Indexed: 01/04/2023] Open
Abstract
A large majority of neurons in the superficial layer of the dorsal horn projects to the lateral parabrachial nucleus (LPB). LPB neurons then project to the capsular part of the central amygdala (CeA; CeC), a key structure underlying the nociception-emotion link. LPB-CeC synaptic transmission is enhanced in various pain models by using electrical stimulation of putative fibers of LPB origin in brain slices. However, this approach has limitations for examining direct monosynaptic connections devoid of directly stimulating fibers from other structures and local GABAergic neurons. To overcome these limitations, we infected the LPB of rats with an adeno-associated virus vector expressing channelrhodopsin-2 and prepared coronal and horizontal brain slices containing the amygdala. We found that blue light stimulation resulted in monosynaptic excitatory postsynaptic currents (EPSCs), with very small latency fluctuations, followed by a large polysynaptic inhibitory postsynaptic current in CeC neurons, regardless of the firing pattern type. Intraplantar formalin injection at 24 h before slice preparation significantly increased EPSC amplitude in late firing-type CeC neurons. These results indicate that direct monosynaptic glutamatergic inputs from the LPB not only excite CeC neurons but also regulate CeA network signaling through robust feed-forward inhibition, which is under plastic modulation in response to persistent inflammatory pain.
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Affiliation(s)
- Yae K Sugimura
- Department of Neuroscience, The Jikei University School of Medicine, Minato, Tokyo, Japan; Center for Neuroscience of Pain, The Jikei University School of Medicine, Minato, Tokyo, Japan; Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan
| | - Yukari Takahashi
- Department of Neuroscience, The Jikei University School of Medicine, Minato, Tokyo, Japan; Center for Neuroscience of Pain, The Jikei University School of Medicine, Minato, Tokyo, Japan
| | - Ayako M Watabe
- Department of Neuroscience, The Jikei University School of Medicine, Minato, Tokyo, Japan; Center for Neuroscience of Pain, The Jikei University School of Medicine, Minato, Tokyo, Japan; Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Kawaguchi, Saitama, Japan; and Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Fusao Kato
- Department of Neuroscience, The Jikei University School of Medicine, Minato, Tokyo, Japan; Center for Neuroscience of Pain, The Jikei University School of Medicine, Minato, Tokyo, Japan; Nagoya University Graduate School of Medicine, Nagoya, Japan
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16
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Tsuji M, Takahashi Y, Watabe AM, Kato F. Enhanced long-term potentiation in mature rats in a model of epileptic spasms with betamethasone-priming and postnatal N-methyl-D-aspartate administration. Epilepsia 2016; 57:495-505. [PMID: 26792416 DOI: 10.1111/epi.13315] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Patients with epileptic spasms are at high risk for learning and memory impairment later in life. We examined whether synaptic plasticity is affected in the adult hippocampus, a structure responsible for learning and memory, using an animal model of epileptic spasms of unknown cause. METHODS We produced a rat model of N-methyl-d-aspartate (NMDA)-induced spasms combined with prenatal betamethasone administration. In 6- to 11-week-old rats, we evaluated the long-term potentiation (LTP) and general properties of synaptic transmission in pyramidal neurons in the CA1 area of the hippocampus in brain slices. RESULTS The magnitude of LTP by theta burst stimulation was significantly larger in adult rats with a history of infantile NMDA injections than in control rats and rats that received additional adrenocorticotropic hormone (ACTH) treatment. The frequency of spontaneous excitatory transmission, but not inhibitory transmission, was smaller in adult rats with a history of infantile NMDA injections. SIGNIFICANCE This study is the first to provide a basis for the alteration of synaptic plasticity and transmission in a model of epileptic spasms of unknown cause. Postnatal NMDA treatment causing epileptic spasms-like aberrant episodes in the early stage of life in rats has a latent influence on various forms of synaptic plasticity in the hippocampus. Our results provide a novel insight into cognitive impairment that appears later in life in patients with a history of epileptic spasms.
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Affiliation(s)
- Megumi Tsuji
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan.,Division of Pediatric Neurology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Yukari Takahashi
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan
| | - Ayako M Watabe
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
| | - Fusao Kato
- Department of Neuroscience, The Jikei University School of Medicine, Tokyo, Japan
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17
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Watabe AM, Nagase M, Hagiwara A, Hida Y, Tsuji M, Ochiai T, Kato F, Ohtsuka T. SAD-B kinase regulates pre-synaptic vesicular dynamics at hippocampal Schaffer collateral synapses and affects contextual fear memory. J Neurochem 2015; 136:36-47. [PMID: 26444684 DOI: 10.1111/jnc.13379] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 07/06/2015] [Revised: 09/09/2015] [Accepted: 09/23/2015] [Indexed: 11/29/2022]
Abstract
Synapses of amphids defective (SAD)-A/B kinases control various steps in neuronal development and differentiation, such as axon specifications and maturation in central and peripheral nervous systems. At mature pre-synaptic terminals, SAD-B is associated with synaptic vesicles and the active zone cytomatrix; however, how SAD-B regulates neurotransmission and synaptic plasticity in vivo remains unclear. Thus, we used SAD-B knockout (KO) mice to study the function of this pre-synaptic kinase in the brain. We found that the paired-pulse ratio was significantly enhanced at Shaffer collateral synapses in the hippocampal CA1 region in SAD-B KO mice compared with wild-type littermates. We also found that the frequency of the miniature excitatory post-synaptic current was decreased in SAD-B KO mice. Moreover, synaptic depression following prolonged low-frequency synaptic stimulation was significantly enhanced in SAD-B KO mice. These results suggest that SAD-B kinase regulates vesicular release probability at pre-synaptic terminals and is involved in vesicular trafficking and/or regulation of the readily releasable pool size. Finally, we found that hippocampus-dependent contextual fear learning was significantly impaired in SAD-B KO mice. These observations suggest that SAD-B kinase plays pivotal roles in controlling vesicular release properties and regulating hippocampal function in the mature brain. Synapses of amphids defective (SAD)-A/B kinases control various steps in neuronal development and differentiation, but their roles in mature brains were only partially known. Here, we demonstrated, at mature pre-synaptic terminals, that SAD-B regulates vesicular release probability and synaptic plasticity. Moreover, hippocampus-dependent contextual fear learning was significantly impaired in SAD-B KO mice, suggesting that SAD-B kinase plays pivotal roles in controlling vesicular release properties and regulating hippocampal function in the mature brain.
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Affiliation(s)
- Ayako M Watabe
- Department of Neuroscience, School of Medicine, Jikei University, Tokyo, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Kawaguchi, Saitama, Japan
| | - Masashi Nagase
- Department of Neuroscience, School of Medicine, Jikei University, Tokyo, Japan
| | - Akari Hagiwara
- Department of Biochemistry, University of Yamanashi, Yamanashi, Japan
| | - Yamato Hida
- Department of Biochemistry, University of Yamanashi, Yamanashi, Japan
| | - Megumi Tsuji
- Department of Neuroscience, School of Medicine, Jikei University, Tokyo, Japan
| | - Toshitaka Ochiai
- Department of Neuroscience, School of Medicine, Jikei University, Tokyo, Japan
| | - Fusao Kato
- Department of Neuroscience, School of Medicine, Jikei University, Tokyo, Japan
| | - Toshihisa Ohtsuka
- Department of Biochemistry, University of Yamanashi, Yamanashi, Japan
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18
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Sato M, Ito M, Nagase M, Sugimura YK, Takahashi Y, Watabe AM, Kato F. The lateral parabrachial nucleus is actively involved in the acquisition of fear memory in mice. Mol Brain 2015; 8:22. [PMID: 25888401 PMCID: PMC4377188 DOI: 10.1186/s13041-015-0108-z] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 03/05/2015] [Indexed: 12/31/2022] Open
Abstract
Background Pavlovian fear conditioning is a form of learning accomplished by associating a conditioned stimulus (CS) and an unconditioned stimulus (US). While CS–US associations are generally thought to occur in the amygdala, the pathway mediating US signal processing has only been partially identified. The external part of the pontine lateral parabrachial nucleus (elPB) is well situated for providing US nociceptive information to the central amygdala (CeA), which was recently revealed to play a primary role in fear acquisition. Therefore, we manipulated the elPB activity to examine its role in the regulation of fear learning. Results First, we transiently inactivate the elPB during the acquisition of fear memory. Mice received bilateral elPB injections of the GABAA agonist muscimol (MUS) or phosphate-buffered saline (drug control), with bilateral misplacement of MUS defined as a placement control group. After the injection, mice were conditioned with a pure tone and foot-shock. On a memory retrieval test on day 2, the freezing ratio was significantly lower in the MUS group compared with that in the drug control or placement control groups. A second retrieval test using a pip tone on day 4 following de novo training on day 3, resulted in significant freezing with no group differences, indicating integrity of fear learning and a temporary limited effect of MUS. Next, we examined whether selectively activating the elPB-CeC pathway is sufficient to induce fear learning when paired with CS. Mice with channelrhodopsin2 (ChR2) expressed in the elPB received a pure tone (CS) in association with optical stimulation in the CeA (CS-LED paired group). On the retrieval test, CS-LED paired mice exhibited significantly higher freezing ratios evoked by CS presentation compared with both control mice receiving optical stimulation immediately after being placed in the shock chamber and exposed to the CS much later (immediate shock group) and those expressing only GFP (GFP control group). These results suggest that selective stimulation of the elPB-CeC pathway substitutes for the US to induce fear learning. Conclusions The elPB activity is necessary and sufficient to trigger fear learning, likely as a part of the pathway transmitting aversive signals to the CeA.
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Affiliation(s)
- Masaru Sato
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan. .,Department of Anesthesiology, Jikei University School of Medicine, Tokyo, 105-8461, Japan.
| | - Mariko Ito
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan. .,Department of Anesthesiology, Jikei University School of Medicine, Tokyo, 105-8461, Japan.
| | - Masashi Nagase
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan.
| | - Yae K Sugimura
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan.
| | - Yukari Takahashi
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan.
| | - Ayako M Watabe
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan. .,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Kawaguchi, Saitama, 332-0012, Japan. .,Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.
| | - Fusao Kato
- Department of Neuroscience, Jikei University School of Medicine, Tokyo, 105-8461, Japan. .,Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan.
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Hamada S, Ogawa I, Yamasaki M, Kiyama Y, Kassai H, Watabe AM, Nakao K, Aiba A, Watanabe M, Manabe T. The glutamate receptor GluN2 subunit regulates synaptic trafficking of AMPA receptors in the neonatal mouse brain. Eur J Neurosci 2014; 40:3136-46. [DOI: 10.1111/ejn.12682] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 07/03/2014] [Accepted: 07/04/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Shun Hamada
- Division of Neuronal Network; Institute of Medical Science; University of Tokyo; Tokyo 108-8639 Japan
| | - Itone Ogawa
- Division of Neuronal Network; Institute of Medical Science; University of Tokyo; Tokyo 108-8639 Japan
| | - Miwako Yamasaki
- Department of Anatomy; Hokkaido University Graduate School of Medicine; Sapporo Japan
| | - Yuji Kiyama
- Division of Neuronal Network; Institute of Medical Science; University of Tokyo; Tokyo 108-8639 Japan
| | - Hidetoshi Kassai
- Laboratory of Animal Resources; Center for Disease Biology and Integrative Medicine; Faculty of Medicine; University of Tokyo; Tokyo Japan
- Division of Molecular Genetics; Kobe University Graduate School of Medicine; Kobe Japan
| | - Ayako M. Watabe
- Division of Neuronal Network; Institute of Medical Science; University of Tokyo; Tokyo 108-8639 Japan
- PRESTO JST; Kawaguchi Saitama Japan
| | - Kazuki Nakao
- Laboratory of Animal Resources; Center for Disease Biology and Integrative Medicine; Faculty of Medicine; University of Tokyo; Tokyo Japan
- Laboratory for Animal Resources and Genetic Engineering; Center for Developmental Biology; RIKEN; Kobe Japan
| | - Atsu Aiba
- Laboratory of Animal Resources; Center for Disease Biology and Integrative Medicine; Faculty of Medicine; University of Tokyo; Tokyo Japan
- Division of Molecular Genetics; Kobe University Graduate School of Medicine; Kobe Japan
| | - Masahiko Watanabe
- Department of Anatomy; Hokkaido University Graduate School of Medicine; Sapporo Japan
| | - Toshiya Manabe
- Division of Neuronal Network; Institute of Medical Science; University of Tokyo; Tokyo 108-8639 Japan
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Kinoshita J, Takahashi Y, Watabe AM, Utsunomiya K, Kato F. Impaired noradrenaline homeostasis in rats with painful diabetic neuropathy as a target of duloxetine analgesia. Mol Pain 2013; 9:59. [PMID: 24279796 PMCID: PMC4222693 DOI: 10.1186/1744-8069-9-59] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 11/22/2013] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Painful diabetic neuropathy (PDN) is a serious complication of diabetes mellitus that affects a large number of patients in many countries. The molecular mechanisms underlying the exaggerated nociception in PDN have not been established. Recently, duloxetine (DLX), a serotonin and noradrenaline re-uptake inhibitor, has been recommended as one of the first-line treatments of PDN in the United States Food and Drug Administration, the European Medicines Agency and the Japanese Guideline for the Pharmacologic Management of Neuropathic pain. Because selective serotonin re-uptake inhibitors show limited analgesic effects in PDN, we examined whether the potent analgesic effect of DLX contributes toward improving the pathologically aberrant noradrenaline homeostasis in diabetic models. RESULTS In streptozotocin (STZ) (50 mg/kg, i.v.)-induced diabetic rats that exhibited robust mechanical allodynia and thermal hyperalgesia, DLX (10 mg/kg, i.p.) significantly and markedly increased the nociceptive threshold. The analgesic effect of DLX was nullified by the prior administration of N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine (DSP-4) (50 mg/kg, i.p.), which drastically eliminated dopamine-beta-hydroxylase- and norepinephrine transporter-immunopositive fibers in the lumbar spinal dorsal horn and significantly reduced the noradrenaline content in the lumbar spinal cord. The treatment with DSP-4 alone markedly lowered the nociceptive threshold in vehicle-treated non-diabetic rats; however, this pro-nociceptive effect was occluded in STZ-treated diabetic rats. Furthermore, STZ-treated rats exhibited a higher amount of dopamine-beta-hydroxylase- and norepinephrine transporter-immunopositive fibers in the dorsal horn and noradrenaline content in the spinal cord compared to vehicle-treated rats. CONCLUSIONS Impaired noradrenaline-mediated regulation of the spinal nociceptive network might underlie exaggerated nociception in PDN. DLX might exert its analgesic effect by selective enhancement of noradrenergic signals, thus counteracting this situation.
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Affiliation(s)
- Jun Kinoshita
- Department of Neuroscience, Jikei University School of Medicine, Minato, Tokyo 105-8461, Japan.
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21
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Watabe AM, Ochiai T, Nagase M, Takahashi Y, Sato M, Kato F. Synaptic potentiation in the nociceptive amygdala following fear learning in mice. Mol Brain 2013; 6:11. [PMID: 23452928 PMCID: PMC3606120 DOI: 10.1186/1756-6606-6-11] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 02/26/2013] [Indexed: 12/23/2022] Open
Abstract
Background Pavlovian fear conditioning is a classical form of associative learning, which depends on associative synaptic plasticity in the amygdala. Recent findings suggest that the central amygdala (CeA) plays an active role in the acquisition of fear learning. However, little is known about the synaptic properties of the CeA in fear learning. The capsular part of the central amygdala (CeC) receives direct nociceptive information from the external part of the lateral parabrachial nucleus (lPB), as well as highly processed polymodal signals from the basolateral nucleus of the amygdala (BLA). Therefore, we focused on CeC as a convergence point for polymodal BLA signals and nociceptive lPB signals, and explored the synaptic regulation of these pathways in fear conditioning. Results In this study, we show that fear conditioning results in synaptic potentiation in both lPB-CeC and BLA-CeC synapses. This potentiation is dependent on associative fear learning, rather than on nociceptive or sensory experience, or fear memory retrieval. The synaptic weight of the lPB-CeC and BLA-CeC pathways is correlated in fear-conditioned mice, suggesting that fear learning may induce activity-dependent heterosynaptic interactions between lPB-CeC and BLA-CeC pathways. This synaptic potentiation is associated with both postsynaptic and presynaptic changes in the lPB-CeC and BLA-CeC synapses. Conclusions These results indicate that the CeC may provide an important locus of Pavlovian association, integrating direct nociceptive signals with polymodal sensory signals. In addition to the well-established plasticity of the lateral amygdala, the multi-step nature of this association system contributes to the highly orchestrated tuning of fear learning.
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Affiliation(s)
- Ayako M Watabe
- Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan.
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22
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Kato HK, Kassai H, Watabe AM, Aiba A, Manabe T. Functional coupling of the metabotropic glutamate receptor, InsP3 receptor and L-type Ca2+ channel in mouse CA1 pyramidal cells. J Physiol 2012; 590:3019-34. [PMID: 22586220 DOI: 10.1113/jphysiol.2012.232942] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Activity-dependent regulation of calcium dynamics in neuronal cells can play significant roles in the modulation of many cellular processes such as intracellular signalling, neuronal activity and synaptic plasticity. Among many calcium influx pathways into neurons, the voltage-dependent calcium channel (VDCC) is the major source of calcium influx, but its modulation by synaptic activity has still been under debate. While the metabotropic glutamate receptor (mGluR) is supposed to modulate L-type VDCCs (L-VDCCs), its reported actions include both facilitation and suppression, probably reflecting the uncertainty of both the molecular targets of the mGluR agonists and the source of the recorded calcium signal in previous reports. In this study, using subtype-specific knockout mice, we have shown that mGluR5 induces facilitation of the depolarization-evoked calcium current. This facilitation was not accompanied by the change in single-channel properties of the VDCC itself; instead, it required the activation of calcium-induced calcium release (CICR) that was triggered by VDCC opening, suggesting that the opening of CICR-coupled cation channels was essential for the facilitation. This facilitation was blocked or reduced by the inhibitors of both L-VDCCs and InsP3 receptors (InsP3Rs). Furthermore, L-VDCCs and mGluR5 were shown to form a complex by coimmunoprecipitation, suggesting that the specific functional coupling between mGluR5, InsP3Rs and L-VDCCs played a pivotal role in the calcium-current facilitation. Finally, we showed that mGluR5 enhanced VDCC-dependent long-term potentiation (LTP) of synaptic transmission. Our study has identified a novel mechanism of the interaction between the mGluR and calcium signalling, and suggested a contribution of mGluR5 to synaptic plasticity.
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Affiliation(s)
- Hiroyuki K Kato
- Division of Neuronal Network, Department of Basic Medical Sciences, Institute of Medical Science, University of Tokyo, Tokyo, 108-8639, Japan
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23
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Nomoto M, Takeda Y, Uchida S, Mitsuda K, Enomoto H, Saito K, Choi T, Watabe AM, Kobayashi S, Masushige S, Manabe T, Kida S. Dysfunction of the RAR/RXR signaling pathway in the forebrain impairs hippocampal memory and synaptic plasticity. Mol Brain 2012; 5:8. [PMID: 22316320 PMCID: PMC3298701 DOI: 10.1186/1756-6606-5-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 02/08/2012] [Indexed: 01/23/2023] Open
Abstract
Background Retinoid signaling pathways mediated by retinoic acid receptor (RAR)/retinoid × receptor (RXR)-mediated transcription play critical roles in hippocampal synaptic plasticity. Furthermore, recent studies have shown that treatment with retinoic acid alleviates age-related deficits in hippocampal long-term potentiation (LTP) and memory performance and, furthermore, memory deficits in a transgenic mouse model of Alzheimer's disease. However, the roles of the RAR/RXR signaling pathway in learning and memory at the behavioral level have still not been well characterized in the adult brain. We here show essential roles for RAR/RXR in hippocampus-dependent learning and memory. In the current study, we generated transgenic mice in which the expression of dominant-negative RAR (dnRAR) could be induced in the mature brain using a tetracycline-dependent transcription factor and examined the effects of RAR/RXR loss. Results The expression of dnRAR in the forebrain down-regulated the expression of RARβ, a target gene of RAR/RXR, indicating that dnRAR mice exhibit dysfunction of the RAR/RXR signaling pathway. Similar with previous findings, dnRAR mice displayed impaired LTP and AMPA-mediated synaptic transmission in the hippocampus. More importantly, these mutant mice displayed impaired hippocampus-dependent social recognition and spatial memory. However, these deficits of LTP and memory performance were rescued by stronger conditioning stimulation and spaced training, respectively. Finally, we found that pharmacological blockade of RARα in the hippocampus impairs social recognition memory. Conclusions From these observations, we concluded that the RAR/RXR signaling pathway greatly contributes to learning and memory, and LTP in the hippocampus in the adult brain.
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Affiliation(s)
- Masanori Nomoto
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
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24
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Ochiai T, Takahashi Y, Asato M, Watabe AM, Ohsawa M, Kamei J, Kato F. Potentiated synaptic transmission in the nociceptive amygdala of diabetic mice with neuropathic pain. Neurosci Res 2011. [DOI: 10.1016/j.neures.2011.07.957] [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: 11/28/2022]
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Nagase M, Watabe AM, Kato F. Synapse type-dependent contributions of MCT-dependent energy supply to the maintenance of transmission in the rat brain. Neurosci Res 2011. [DOI: 10.1016/j.neures.2011.07.1438] [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: 11/30/2022]
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26
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Takahashi Y, Nagase M, Ochiai T, Yasui Y, Nakao A, Watabe AM, Takagi S, Sato M, Okutsu Y, Moriguchi T, Sato K, Kato F. Multiple parameter evaluation of the altered neuronal excitability in the central amygdala of the rats with perinatal administration of ethanol, nicotine and valproate. Neurosci Res 2011. [DOI: 10.1016/j.neures.2011.07.1755] [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: 10/17/2022]
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Abstract
The hippocampus is essential for the formation of certain types of memory, and synaptic plasticity such as long-term potentiation (LTP) is widely accepted as a cellular basis of hippocampus-dependent memory. Although LTP in both perforant path-dentate gyrus (DG) granule cell and CA3-CA1 pyramidal cell synapses is similarly dependent on activation of postsynaptic N-methyl-D-aspartate receptors, several reports suggest that modulation of LTP by γ-aminobutyric acid (GABA) receptor-mediated inhibitory inputs is stronger in perforant path-DG granule cell synapses. However, little is known about how different the mechanism and physiological relevance of the GABAergic modulation of LTP induction are among different brain regions. We confirmed that the action of GABA(A) receptor antagonists on LTP was more prominent in the DG, and explored the mechanism introducing such difference by examining two types of GABA(A) receptor-mediated inhibition, i.e. synaptic and tonic inhibition. As synaptic inhibition, we compared inhibitory vs. excitatory monosynaptic responses and their summation during an LTP-inducing stimulus, and found that the balance of the summated postsynaptic currents was biased toward inhibition in the DG. As tonic inhibition, or sustained activation of extrasynaptic GABA(A) receptors by ambient GABA, we measured the change in holding currents of the postsynaptic cells induced by GABA(A) receptor antagonists, and found that the tonic inhibition was significantly stronger in the DG. Furthermore, we found that tonic inhibition was associated with LTP modulation. Our results suggest that both the larger tonic inhibition and the larger inhibitory/excitatory summation balance during conditioning are involved in the stronger inhibitory modulation of LTP in the DG.
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Affiliation(s)
- Fumiko Arima-Yoshida
- Division of Neuronal Network, Department of Basic Medical Sciences, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
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Moody TD, Watabe AM, Indersmitten T, Komiyama NH, Grant SG, O'Dell TJ. Beta-adrenergic receptor activation rescues theta frequency stimulation-induced LTP deficits in mice expressing C-terminally truncated NMDA receptor GluN2A subunits. Learn Mem 2011; 18:118-27. [PMID: 21257779 PMCID: PMC3032578 DOI: 10.1101/lm.2045311] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2010] [Accepted: 11/19/2010] [Indexed: 01/15/2023]
Abstract
Through protein interactions mediated by their cytoplasmic C termini the GluN2A and GluN2B subunits of NMDA receptors (NMDARs) have a key role in the formation of NMDAR signaling complexes at excitatory synapses. Although these signaling complexes are thought to have a crucial role in NMDAR-dependent forms of synaptic plasticity such as long-term potentiation (LTP), the role of the C terminus of GluN2A in coupling NMDARs to LTP enhancing and/or suppressing signaling pathways is unclear. To address this issue we examined the induction of LTP in the hippocampal CA1 region in mice lacking the C terminus of endogenous GluN2A subunits (GluN2AΔC/ΔC). Our results show that truncation of GluN2A subunits produces robust, but highly frequency-dependent, deficits in LTP and a reduction in basal levels of extracellular signal regulated kinase 2 (ERK2) activation and phosphorylation of AMPA receptor GluA1 subunits at a protein kinase A site (serine 845). Consistent with the notion that these signaling deficits contribute to the deficits in LTP in GluN2AΔC/ΔC mice, activating ERK2 and increasing GluA1 S845 phosphorylation through activation of β-adrenergic receptors rescued the induction of LTP in these mutants. Together, our results indicate that the capacity of excitatory synapses to undergo plasticity in response to different patterns of activity is dependent on the coupling of specific signaling pathways to the intracellular domains of the NMDARs and that abnormal plasticity resulting from mutations in NMDARs can be reduced by activation of key neuromodulatory transmitter receptors that engage converging signaling pathways.
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Affiliation(s)
- Teena D. Moody
- Interdepartmental PhD Program for Neuroscience, University of California Los Angeles, Los Angeles, California 90024, USA
| | - Ayako M. Watabe
- Laboratory of Neurophysiology, Department of Neuroscience, Jikei University School of Medicine, Tokyo 105-8461, Japan
- PRESTO, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Tim Indersmitten
- Interdepartmental PhD Program for Neuroscience, University of California Los Angeles, Los Angeles, California 90024, USA
| | | | - Seth G.N. Grant
- Wellcome Trust Sanger Institute, Cambridge CB10 1SA, United Kingdom
| | - Thomas J. O'Dell
- Department of Physiology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California 90024, USA
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Yamamoto K, Noguchi J, Yamada C, Watabe AM, Kato F. Distinct target cell-dependent forms of short-term plasticity of the central visceral afferent synapses of the rat. BMC Neurosci 2010; 11:134. [PMID: 20961403 PMCID: PMC2978217 DOI: 10.1186/1471-2202-11-134] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Accepted: 10/20/2010] [Indexed: 11/25/2022] Open
Abstract
Background The visceral afferents from various cervico-abdominal sensory receptors project to the dorsal vagal complex (DVC), which is composed of the nucleus of the solitary tract (NTS), the area postrema and the dorsal motor nucleus of the vagus nerve (DMX), via the vagus and glossopharyngeal nerves and then the solitary tract (TS) in the brainstem. While the excitatory transmission at the TS-NTS synapses shows strong frequency-dependent suppression in response to repeated stimulation of the afferents, the frequency dependence and short-term plasticity at the TS-DMX synapses, which also transmit monosynaptic information from the visceral afferents to the DVC neurons, remain largely unknown. Results Recording of the EPSCs activated by paired or repeated TS stimulation in the brainstem slices of rats revealed that, unlike NTS neurons whose paired-pulse ratio (PPR) is consistently below 0.6, the distribution of the PPR of DMX neurons shows bimodal peaks that are composed of type I (PPR, 0.6-1.5; 53% of 120 neurons recorded) and type II (PPR, < 0.6; 47%) neurons. Some of the type I DMX neurons showed paired-pulse potentiation. The distinction of these two types depended on the presynaptic release probability and the projection target of the postsynaptic cells; the distinction was not dependent on the location or soma size of the cell, intensity or site of the stimulation, the latency, standard deviation of latency or the quantal size. Repeated stimulation at 20 Hz resulted in gradual and potent decreases in EPSC amplitude in the NTS and type II DMX neurons, whereas type I DMX neurons displayed only slight decreases, which indicates that the DMX neurons of this type could be continuously activated by repeated firing of primary afferent fibers at a high (~10 Hz) frequency. Conclusions These two general types of short-term plasticity might contribute to the differential activation of distinct vago-vagal reflex circuits, depending on the firing frequency and type of visceral afferents.
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Affiliation(s)
- Kiyofumi Yamamoto
- Laboratory of Neurophysiology, Department of Neuroscience, Jikei University School of Medicine, Minato-ku, Tokyo 105-8461, Japan
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Hamada S, Ogawa I, Kiyama Y, Watabe AM, Kassai H, Nakao K, Aiba A, Manabe T. The replacement of GluN2B with GluN2A increases synaptic trafficking of AMPA receptors in the neonatal mouse brain. Neurosci Res 2010. [DOI: 10.1016/j.neures.2010.07.984] [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: 10/19/2022]
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31
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Taniguchi S, Nakazawa T, Tanimura A, Kiyama Y, Tezuka T, Watabe AM, Katayama N, Yokoyama K, Inoue T, Izumi-Nakaseko H, Kakuta S, Sudo K, Iwakura Y, Umemori H, Inoue T, Murphy NP, Hashimoto K, Kano M, Manabe T, Yamamoto T. Involvement of NMDAR2A tyrosine phosphorylation in depression-related behaviour. EMBO J 2009; 28:3717-29. [PMID: 19834457 DOI: 10.1038/emboj.2009.300] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 09/09/2009] [Indexed: 11/09/2022] Open
Abstract
Major depressive and bipolar disorders are serious illnesses that affect millions of people. Growing evidence implicates glutamate signalling in depression, though the molecular mechanism by which glutamate signalling regulates depression-related behaviour remains unknown. In this study, we provide evidence suggesting that tyrosine phosphorylation of the NMDA receptor, an ionotropic glutamate receptor, contributes to depression-related behaviour. The NR2A subunit of the NMDA receptor is tyrosine-phosphorylated, with Tyr 1325 as its one of the major phosphorylation site. We have generated mice expressing mutant NR2A with a Tyr-1325-Phe mutation to prevent the phosphorylation of this site in vivo. The homozygous knock-in mice show antidepressant-like behaviour in the tail suspension test and in the forced swim test. In the striatum of the knock-in mice, DARPP-32 phosphorylation at Thr 34, which is important for the regulation of depression-related behaviour, is increased. We also show that the Tyr 1325 phosphorylation site is required for Src-induced potentiation of the NMDA receptor channel in the striatum. These data argue that Tyr 1325 phosphorylation regulates NMDA receptor channel properties and the NMDA receptor-mediated downstream signalling to modulate depression-related behaviour.
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Affiliation(s)
- Sachiko Taniguchi
- Division of Oncology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
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Tazuke C, Miwa H, Matsui M, Watabe AM, Manabe T. Cholinergic suppression of synaptic transmission in the lateral amygdala. Neurosci Res 2009. [DOI: 10.1016/j.neures.2009.09.679] [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: 10/20/2022]
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Miwa H, Fukaya M, Watabe AM, Watanabe M, Manabe T. Functional contributions of synaptically localized NR2B subunits of the NMDA receptor to synaptic transmission and long-term potentiation in the adult mouse CNS. J Physiol 2008; 586:2539-50. [PMID: 18372311 DOI: 10.1113/jphysiol.2007.147652] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The NMDA-type glutamate receptor is a heteromeric complex composed of the NR1 and at least one of the NR2 subunits. Switching from the NR2B to the NR2A subunit is thought to underlie functional alteration of the NMDA receptor during synaptic maturation, and it is generally believed that it results in preferential localization of NR2A subunits on the synaptic site and that of NR2B subunits on the extracellular site in the mature brain. It has also been proposed that activation of the NR2A and NR2B subunits results in long-term potentiation (LTP) and long-term depression (LTD), respectively. Furthermore, recent reports suggest that synaptic and extrasynaptic receptors may have distinct roles in synaptic plasticity as well as in gene expression associated with neuronal death. Here, we have investigated whether NR2B subunit-containing receptors are present and functional at mature synapses in the lateral nucleus of the amygdala (LA) and the CA1 region of the hippocampus, comparing their properties between the two brain regions. We have found, in contrast to the above hypotheses, that the NR2B subunit significantly contributes to synaptic transmission as well as LTP induction. Furthermore, its contribution is greater in the LA than in the CA1 region, and biophysical properties of NMDA receptors and the NR2B/NR2A ratio are different between the two brain regions. These results indicate that NR2B subunit-containing NMDA receptors accumulate on the synaptic site and are responsible for the unique properties of synaptic function and plasticity in the amygdala.
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Affiliation(s)
- Hideki Miwa
- Division of Neuronal Network, Department of Basic Medical Sciences, Institute of Medical Science, University of Tokyo, Tokyo, 108-8639, Japan
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34
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Nakazawa T, Komai S, Watabe AM, Kiyama Y, Fukaya M, Arima-Yoshida F, Horai R, Sudo K, Ebine K, Delawary M, Goto J, Umemori H, Tezuka T, Iwakura Y, Watanabe M, Yamamoto T, Manabe T. NR2B tyrosine phosphorylation modulates fear learning as well as amygdaloid synaptic plasticity. EMBO J 2006; 25:2867-77. [PMID: 16710293 PMCID: PMC1500840 DOI: 10.1038/sj.emboj.7601156] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2005] [Accepted: 04/28/2006] [Indexed: 11/08/2022] Open
Abstract
Phosphorylation of neural proteins in response to a diverse array of external stimuli is one of the main mechanisms underlying dynamic changes in neural circuitry. The NR2B subunit of the NMDA receptor is tyrosine-phosphorylated in the brain, with Tyr-1472 its major phosphorylation site. Here, we generate mice with a knockin mutation of the Tyr-1472 site to phenylalanine (Y1472F) and show that Tyr-1472 phosphorylation is essential for fear learning and amygdaloid synaptic plasticity. The knockin mice show impaired fear-related learning and reduced amygdaloid long-term potentiation. NMDA receptor-mediated CaMKII signaling is impaired in YF/YF mice. Electron microscopic analyses reveal that the Y1472F mutant of the NR2B subunit shows improper localization at synapses in the amygdala. We thus identify Tyr-1472 phosphorylation as a key mediator of fear learning and amygdaloid synaptic plasticity.
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Affiliation(s)
- Takanobu Nakazawa
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
| | - Shoji Komai
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo, Japan
| | - Ayako M Watabe
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo, Japan
| | - Yuji Kiyama
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo, Japan
| | - Masahiro Fukaya
- Department of Anatomy, Hokkaido University School of Medicine, Sapporo, Japan
| | - Fumiko Arima-Yoshida
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo, Japan
| | - Reiko Horai
- Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Katsuko Sudo
- Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Kazumi Ebine
- Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Mina Delawary
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
| | - June Goto
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
| | - Hisashi Umemori
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
| | - Tohru Tezuka
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
| | - Yoichiro Iwakura
- Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Masahiko Watanabe
- Department of Anatomy, Hokkaido University School of Medicine, Sapporo, Japan
| | - Tadashi Yamamoto
- Division of Oncology, Department of Cancer Biology, University of Tokyo, Tokyo, Japan
- Division of Oncology, Department of Cancer Biology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan. Tel.: +81 3 5449 5301; Fax: +81 3 5449 5413; E-mail:
| | - Toshiya Manabe
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo, Japan
- CREST, Japan Science and Technology Agency, Tokyo, Japan
- Division of Neuronal Network, Department of Basic Medical Sciences, University of Tokyo, Tokyo 108-8639, Japan. Tel.: +81 3 5449 5799; Fax: +81 3 5449 5794; E-mail:
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35
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Bando T, Sekine K, Kobayashi S, Watabe AM, Rump A, Tanaka M, Suda Y, Kato S, Morikawa Y, Manabe T, Miyajima A. Neuronal leucine-rich repeat protein 4 functions in hippocampus-dependent long-lasting memory. Mol Cell Biol 2005; 25:4166-75. [PMID: 15870286 PMCID: PMC1087730 DOI: 10.1128/mcb.25.10.4166-4175.2005] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Neuronal leucine-rich repeat proteins (NLRRs) are type I transmembrane proteins and expressed in neuronal tissues, but their function remains unknown. Here, we describe the identification and characterization of a new member of the NLRR family, NLRR4, and its potential role in long-lasting memory. We generated NLRR4-deficient (NLRR4(-/-)) mice and found that they showed impaired memory retention. In hippocampus-dependent learning tasks, NLRR4(-/-) mice were able to learn and maintain the memories for one day but unable to retain the memories for four days after learning. In contrast, in a hippocampus-independent task, NLRR4(-/-) mice were able to retain the memory normally for at least seven days. These results suggest that NLRR4 plays a key role in hippocampus-dependent long-lasting memory.
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Affiliation(s)
- Takayoshi Bando
- Laboratory of Cell Growth and Differentiation, Institute of Molecular and Cellular Biosciences, University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan
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36
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Nakazawa T, Watabe AM, Tezuka T, Yoshida Y, Yokoyama K, Umemori H, Inoue A, Okabe S, Manabe T, Yamamoto T. p250GAP, a novel brain-enriched GTPase-activating protein for Rho family GTPases, is involved in the N-methyl-d-aspartate receptor signaling. Mol Biol Cell 2003; 14:2921-34. [PMID: 12857875 PMCID: PMC165687 DOI: 10.1091/mbc.e02-09-0623] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
N-methyl-d-aspartate (NMDA) receptors regulate structural plasticity by modulating actin organization within dendritic spines. Herein, we report identification and characterization of p250GAP, a novel GTPase-activating protein for Rho family proteins that interacts with the GluRepsilon2 (NR2B) subunit of NMDA receptors in vivo. The p250GAP mRNA was enriched in brain, with high expression in cortex, corpus striatum, hippocampus, and thalamus. Within neurons, p250GAP was highly concentrated in the postsynaptic density and colocalized with the GluRepsilon2 (NR2B) subunit of NMDA receptors and with postsynaptic density-95. p250GAP promoted GTP hydrolysis of Cdc42 and RhoA in vitro and in vivo. When overexpressed in neuroblastoma cells, p250GAP suppressed the activities of Rho family proteins, which resulted in alteration of neurite outgrowth. Finally, NMDA receptor stimulation led to dephosphorylation and redistribution of p250GAP in hippocampal slices. Together, p250GAP is likely to be involved in NMDA receptor activity-dependent actin reorganization in dendritic spines.
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Affiliation(s)
- Takanobu Nakazawa
- Division of Oncology, Department of Cancer Biology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
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37
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Opazo P, Watabe AM, Grant SGN, O'Dell TJ. Phosphatidylinositol 3-kinase regulates the induction of long-term potentiation through extracellular signal-related kinase-independent mechanisms. J Neurosci 2003; 23:3679-88. [PMID: 12736339 PMCID: PMC6742185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023] Open
Abstract
Inhibitors of both phosphatidylinositol-3-kinase (PI3-kinase) and MAPK/ERK (mitogen-activate protein kinase/extracellular signal-related kinase) activation inhibit NMDA receptor-dependent long-term potentiation (LTP). PI3-kinase inhibitors also block activation of ERK by NMDA receptor stimulation, suggesting that PI3-kinase inhibitors block LTP because PI3-kinase is an essential upstream regulator of ERK activation. To examine this hypothesis, we investigated the effects of PI3-kinase inhibitors on ERK activation and LTP induction in the CA1 region of mouse hippocampal slices. Consistent with the notion that ERK activation by NMDA receptor stimulation is PI3-kinase dependent, the PI3-kinase inhibitor wortmannin partially inhibited ERK2 activation induced by bath application of NMDA and strongly suppressed ERK2 activation by high-frequency synaptic stimulation. PI3-kinase and MEK (MAP kinase kinase) inhibitors had very different effects on LTP, however. Both types of inhibitors suppressed LTP induced by theta-frequency trains of synaptic stimulation, but only PI3-kinase inhibitors suppressed the induction of LTP by high-frequency stimulation or low-frequency stimulation paired with postsynaptic depolarization. Concentrations of PI3-kinase inhibitors that inhibited LTP when present during high-frequency stimulation had no effect on potentiated synapses when applied after high-frequency stimulation, suggesting that PI3-kinase is specifically involved in the induction of LTP. Finally, we found that LTP induced by theta-frequency stimulation was MEK inhibitor insensitive but still PI3-kinase dependent in hippocampal slices from PSD-95 (postsynaptic density-95) mutant mice. Together, our results indicate that the role of PI3-kinase in LTP is not limited to its role as an upstream regulator of MAPK signaling but also includes signaling through ERK-independent pathways that regulate LTP induction.
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Affiliation(s)
- Patricio Opazo
- Department of Physiology, David Geffen School of Medicine at University of California at Los Angeles, Los Angeles, California 90095, USA
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38
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Abstract
Several signaling mechanisms that are crucial for the induction of long-term potentiation (LTP) by theta frequency (5 Hz) trains of synaptic stimulation are altered in aged animals. To determine whether theta frequency stimulation-induced LTP is particularly sensitive to changes in synaptic function that occur in aged animals, we examined whether activating synapses in the hippocampal CA1 region with three different trains of theta pulse stimulation (TPS) has different effects on synaptic strength in hippocampal slices from aged and young mice. Our results indicate that TPS-induced LTP is not diminished in the aged hippocampus but does show a dependence on L-type voltage-sensitive calcium channels that is not seen in young animals. Moreover, we found that the facilitation of TPS-induced LTP by co-activation of beta-adrenergic and cholinergic receptors is strongly reduced in slices from aged animals. Together, these results suggest that memory impairments in aged animals might arise, at least in part, from deficits in the ability of modulatory transmitters to regulate activity-dependent forms of synaptic plasticity.
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Affiliation(s)
- Ayako M Watabe
- Department of Physiology, UCLA School of Medicine, 53-231 Center for the Health Sciences, University of California, Box 951751, Los Angeles, CA 90095, USA
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39
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Komiyama NH, Watabe AM, Carlisle HJ, Porter K, Charlesworth P, Monti J, Strathdee DJC, O'Carroll CM, Martin SJ, Morris RGM, O'Dell TJ, Grant SGN. SynGAP regulates ERK/MAPK signaling, synaptic plasticity, and learning in the complex with postsynaptic density 95 and NMDA receptor. J Neurosci 2002; 22:9721-32. [PMID: 12427827 PMCID: PMC6757832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
Abstract
At excitatory synapses, the postsynaptic scaffolding protein postsynaptic density 95 (PSD-95) couples NMDA receptors (NMDARs) to the Ras GTPase-activating protein SynGAP. The close association of SynGAP and NMDARs suggests that SynGAP may have an important role in NMDAR-dependent activation of Ras signaling pathways, such as the MAP kinase pathway, and in synaptic plasticity. To explore this issue, we examined long-term potentiation (LTP), p42 MAPK (ERK2) signaling, and spatial learning in mice with a heterozygous null mutation of the SynGAP gene (SynGAP(-/+)). In SynGAP(-/+) mutant mice, the induction of LTP in the hippocampal CA1 region was strongly reduced in the absence of any detectable alteration in basal synaptic transmission and NMDAR-mediated synaptic currents. Although basal levels of activated ERK2 were elevated in hippocampal extracts from SynGAP(-/+) mice, NMDAR stimulation still induced a robust increase in ERK activation in slices from SynGAP(-/+) mice. Thus, although SynGAP may regulate the ERK pathway, its role in LTP most likely involves additional downstream targets. Consistent with this, the amount of potentiation induced by stimulation protocols that induce an ERK-independent form of LTP were also significantly reduced in slices from SynGAP(-/+) mice. An elevation of basal phospho-ERK2 levels and LTP deficits were also observed in SynGAP(-/+)/H-Ras(-)/- double mutants, suggesting that SynGAP may normally regulate Ras isoforms other than H-Ras. A comparison of SynGAP and PSD-95 mutants suggests that PSD-95 couples NMDARs to multiple downstream signaling pathways with very different roles in LTP and learning.
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Affiliation(s)
- Noboru H Komiyama
- Division of Neuroscience, University of Edinburgh, Edinburgh EH8-9JZ, United Kingdom
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40
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Watabe AM, Carlisle HJ, O'Dell TJ. Postsynaptic induction and presynaptic expression of group 1 mGluR-dependent LTD in the hippocampal CA1 region. J Neurophysiol 2002; 87:1395-403. [PMID: 11877514 DOI: 10.1152/jn.00723.2001] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Activation of metabotropic glutamate receptors (mGluRs) with the group I mGluR selective agonist (R,S)-3,5-dihydroxyphenylglycine (DHPG) induces a long-term depression (LTD) of excitatory synaptic transmission in the CA1 region of the hippocampus. Here we investigated the potential roles of pre- and postsynaptic processes in the DHPG-induced LTD at excitatory synapses onto hippocampal pyramidal cells in the mouse hippocampus. Activation of mGluRs with DHPG, but not ACPD, induced LTD at both Schaffer collateral/commissural fiber synapses onto CA1 pyramidal cells and at associational/commissural fiber synapses onto CA3 pyramidal cells. DHPG-induced LTD was blocked when the G-protein inhibitor guanosine-5'-O-(2-thiodiphosphate) was selectively delivered into postsynaptic CA1 pyramidal cells via an intracellular recording electrode, suggesting that DHPG depresses synaptic transmission through a postsynaptic, GTP-dependent signaling pathway. The effects of DHPG were also strongly modulated, however, by experimental manipulations that altered presynaptic calcium influx. In these experiments, we found that elevating extracellular Ca(2+) concentrations ([Ca(2+)](o)) to 6 mM almost completely blocked the effects of DHPG, whereas lowering [Ca(2+)](o) to 1 mM significantly enhanced the ability of DHPG to depress synaptic transmission. Enhancing Ca(2+) influx by prolonging action potential duration with bath applications of the K(+) channel blocker 4-aminopyridine (4-AP) also strongly reduced the effects of DHPG in the presence of normal [Ca(2+)](o) (2 mM). Although these findings indicate that alterations in Ca(2+)-dependent signaling processes strongly regulate the effects of DHPG on synaptic transmission, they do not distinguish between potential pre- versus postsynaptic sites of action. We found, however, that while inhibiting both pre- and postsynaptic K(+) channels with bath-applied 4-AP blocked the effects of DHPG; inhibition of postsynaptic K(+) channels alone with intracellular Cs(+) and TEA had no effect on the ability of DHPG to inhibit synaptic transmission. This suggests that presynaptic changes in transmitter release contribute to the depression of synaptic transmission by DHPG. Consistent with this, DHPG induced a persistent depression of both AMPA and N-methyl-D-aspartate receptor-mediated components of excitatory postsynaptic currents in voltage-clamped pyramidal cells. Together our results suggest that activation of postsynaptic mGluRs suppresses transmission at excitatory synapses onto CA1 pyramidal cells through presynaptic effects on transmitter release.
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Affiliation(s)
- Ayako M Watabe
- Department of Physiology, UCLA School of Medicine, 53-231 Center for the Health Sciences, Los Angeles, CA 90095, USA
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41
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Watabe AM, Zaki PA, O'Dell TJ. Coactivation of beta-adrenergic and cholinergic receptors enhances the induction of long-term potentiation and synergistically activates mitogen-activated protein kinase in the hippocampal CA1 region. J Neurosci 2000; 20:5924-31. [PMID: 10934239 PMCID: PMC6772603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Interactions between noradrenergic and cholinergic receptor signaling may be important in some forms of learning. To investigate whether noradrenergic and cholinergic receptor interactions regulate forms of synaptic plasticity thought to be involved in memory formation, we examined the effects of concurrent beta-adrenergic and cholinergic receptor activation on the induction of long-term potentiation (LTP) in the hippocampal CA1 region. Low concentrations of the beta-adrenergic receptor agonist isoproterenol (ISO) and the cholinergic receptor agonist carbachol had no effect on the induction of LTP by a brief train of 5 Hz stimulation when applied individually but dramatically facilitated LTP induction when coapplied. Although carbachol did not enhance ISO-induced increases in cAMP, coapplication of ISO and carbachol synergistically activated p42 mitogen-activated protein kinase (p42 MAPK). This suggests that concurrent beta-adrenergic and cholinergic receptor activation enhances LTP induction by activating MAPK and not by additive or synergistic effects on adenylyl cyclase. Consistent with this, blocking MAPK activation with MEK inhibitors suppressed the facilitation of LTP induction produced by concurrent beta-adrenergic and cholinergic receptor activation. Although MEK inhibitors also suppressed the induction of LTP by a stronger 5 Hz stimulation protocol that induced LTP in the absence of ISO and carbachol, they had no effect on LTP induced by high-frequency synaptic stimulation or low-frequency synaptic stimulation paired with postsynaptic depolarization. Our results indicate that MAPK activation has an important, modulatory role in the induction of LTP and suggest that coactivation of noradrenergic and cholinergic receptors regulates LTP induction via convergent effects on MAPK.
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Affiliation(s)
- A M Watabe
- Department of Physiology, University of California, Los Angeles School of Medicine, Los Angeles, California 90095, USA
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42
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Migaud M, Charlesworth P, Dempster M, Webster LC, Watabe AM, Makhinson M, He Y, Ramsay MF, Morris RG, Morrison JH, O'Dell TJ, Grant SG. Enhanced long-term potentiation and impaired learning in mice with mutant postsynaptic density-95 protein. Nature 1998; 396:433-9. [PMID: 9853749 DOI: 10.1038/24790] [Citation(s) in RCA: 926] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Specific patterns of neuronal firing induce changes in synaptic strength that may contribute to learning and memory. If the postsynaptic NMDA (N-methyl-D-aspartate) receptors are blocked, long-term potentiation (LTP) and long-term depression (LTD) of synaptic transmission and the learning of spatial information are prevented. The NMDA receptor can bind a protein known as postsynaptic density-95 (PSD-95), which may regulate the localization of and/or signalling by the receptor. In mutant mice lacking PSD-95, the frequency function of NMDA-dependent LTP and LTD is shifted to produce strikingly enhanced LTP at different frequencies of synaptic stimulation. In keeping with neural-network models that incorporate bidirectional learning rules, this frequency shift is accompanied by severely impaired spatial learning. Synaptic NMDA-receptor currents, subunit expression, localization and synaptic morphology are all unaffected in the mutant mice. PSD-95 thus appears to be important in coupling the NMDA receptor to pathways that control bidirectional synaptic plasticity and learning.
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Affiliation(s)
- M Migaud
- Centre for Genome Research, University of Edinburgh, UK
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43
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Thomas MJ, Watabe AM, Moody TD, Makhinson M, O'Dell TJ. Postsynaptic complex spike bursting enables the induction of LTP by theta frequency synaptic stimulation. J Neurosci 1998; 18:7118-26. [PMID: 9736635 PMCID: PMC6793261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Long-term potentiation (LTP), a persistent enhancement of synaptic transmission that may be involved in some forms of learning and memory, is induced at excitatory synapses in the CA1 region of the hippocampus by coincident presynaptic and postsynaptic activity. Although action potentials back-propagating into dendrites of hippocampal pyramidal cells provide sufficient postsynaptic activity to induce LTP under some in vitro conditions, it is not known whether LTP can be induced by patterns of postsynaptic action potential firing that occur in these cells in vivo. Here we report that a characteristic in vivo pattern of action potential generation in CA1 pyramidal cells known as the complex spike burst enables the induction of LTP during theta frequency synaptic stimulation in the CA1 region of hippocampal slices maintained in vitro. Our results suggest that complex spike bursting may have an important role in synaptic processes involved in learning and memory formation, perhaps by producing a highly sensitive postsynaptic state during which even low frequencies of presynaptic activity can induce LTP.
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Affiliation(s)
- M J Thomas
- Interdepartmental PhD Program for Neuroscience, School of Medicine, University of California, Los Angeles, Los Angeles, California 90095, USA
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44
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Smith DJ, Stevens ME, Sudanagunta SP, Bronson RT, Makhinson M, Watabe AM, O'Dell TJ, Fung J, Weier HU, Cheng JF, Rubin EM. Functional screening of 2 Mb of human chromosome 21q22.2 in transgenic mice implicates minibrain in learning defects associated with Down syndrome. Nat Genet 1997; 16:28-36. [PMID: 9140392 DOI: 10.1038/ng0597-28] [Citation(s) in RCA: 223] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Using Down syndrome as a model for complex trait analysis, we sought to identify loci from chromosome 21q22.2 which, when present in an extra dose, contribute to learning abnormalities. We generated low-copy-number transgenic mice, containing four different yeast artificial chromosomes (YACs) that together cover approximately 2 megabases (Mb) of contiguous DNA from 21q22.2. We subjected independent lines derived from each of these YAC transgenes to a series of behavioural and learning assays. Two of the four YACs caused defects in learning and memory in the transgenic animals, while the other two YACs had no effect. The most severe defects were caused by a 570-kb YAC; the interval responsible for these defects was narrowed to a 180-kb critical region as a consequence of YAC fragmentation. This region contains the human homologue of a Drosophila gene, minibrain, and strongly implicates it in learning defects associated with Down syndrome.
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Affiliation(s)
- D J Smith
- Human Genome Center, Lawrence Berkeley National Laboratory, California 94720, USA
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