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Liu H, Zhang Y, Hou X, Zhu C, Yang Q, Li K, Fan L, Zhang X, Jiang X, Jin X, Lei H, Chen T, Zhang F, Zhang Z, Song J. CRHR1 antagonist alleviated depression-like behavior by downregulating p62 in a rat model of post-stroke depression. Exp Neurol 2024; 378:114822. [PMID: 38823676 DOI: 10.1016/j.expneurol.2024.114822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 05/08/2024] [Accepted: 05/19/2024] [Indexed: 06/03/2024]
Abstract
Post-stroke depression (PSD) is a complication of cerebrovascular disease, which can increase mortality after stroke. CRH is one of the main signaling peptides released after activation of the hypothalamic-pituitary-adrenal (HPA) axis in response to stress. It affects synaptic plasticity by regulating inflammation, oxidative stress and autophagy in the central nervous system. And the loss of spines exacerbates depression-like behavior. Therefore, synaptic deficits induced by CRH may be related to post-stroke depression. However, the underlying mechanism remains unclear. The Keap1-Nrf2 complex is one of the core components of the antioxidant response. As an autophagy associated protein, p62 participates in the Keap1-NrF2 pathway through its Keap1 interaction domain. Oxidative stress is involved in the feedback regulation between Keap1-Nrf2 pathway and p62.However, whether the relationship between CRH and the Keap1-Nrf2-p62 pathway is involved in PSD remains unknown. This study found that serum levels of CRH in 22 patients with PSD were higher than those in healthy subjects. We used MCAO combined with CUMS single-cage SD rats to establish an animal model of PSD. Animal experiments showed that CRHR1 antagonist prevented synaptic loss in the hippocampus of PSD rats and alleviated depression-like behavior. CRH induced p62 accumulation in the prefrontal cortex of PSD rats through CRHR1. CRHR1 antagonist inhibited Keap1-Nrf2-p62 pathway by attenuating oxidative stress. In addition, we found that abnormal accumulation of p62 induces PSD. It alleviates depression-like behavior by inhibiting the expression of p62 and promoting the clearance of p62 in PSD rats. These findings can help explore the pathogenesis of PSD and design targeted treatments for PSD.
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Affiliation(s)
- Huanhuan Liu
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Yunfei Zhang
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University; The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Xiaoli Hou
- General Hospital of Pingmei Shenma Group, Pingdingshan, Henan, China
| | - Chuanzhou Zhu
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Qianling Yang
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Kun Li
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University; The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Lifei Fan
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University; The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Xinyue Zhang
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Xinhui Jiang
- The Third People's Hospital of Luoyang, Luoyang, Henan, China
| | - Xuejiao Jin
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Hao Lei
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University; The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China
| | - Tengfei Chen
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University
| | - Fuping Zhang
- Henan Key Laboratory of Biological Psychiatry, the Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University.
| | - Zhaohui Zhang
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University; The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China.
| | - Jinggui Song
- Henan Engineering Research Center of Physical Diagnostics and Treatment Technology for the Mental and Neurological Diseases, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, China; Henan Collaborative Innovation Center of Prevention and treatment of mental disorder, the Second Affiliated Hospital of Xinxiang Medical University.
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Park SB, Lur G. Repeated exposure to multiple concurrent stressors alters visual processing in the adult posterior parietal cortex. Neurobiol Stress 2024; 31:100660. [PMID: 39100726 PMCID: PMC11296072 DOI: 10.1016/j.ynstr.2024.100660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 06/25/2024] [Accepted: 06/29/2024] [Indexed: 08/06/2024] Open
Abstract
Chronic stress is well known to erode cognitive functions. Yet, our understanding of how repeated stress exposure impacts one of the fundamental bases of cognition: sensory processing, remains limited. The posterior parietal cortex (PPC) is a high order visual region, known for its role in visually guided decision making, multimodal integration, attention, and working memory. Here, we used functional measures to determine how repeated exposure to multiple concurrent stressors (RMS) affects sensory processing in the PPC in adult male mice. A longitudinal experimental design, repeatedly surveying the same population of neurons using in vivo two-photon imaging, revealed that RMS disrupts the balanced turnover of visually responsive cells in layer 2/3 of the PPC. Across the population, RMS-induced changes in visual responsiveness followed a bimodal distribution suggesting idiosyncratic stress effects. In cells that maintained their responsiveness across recording sessions, we found that stress reduced visual response magnitudes and feature selectivity. While we did not observe stress-induced elimination of excitatory synapses, noise correlation statistics indicated that RMS altered visual input to the neuronal population. The impact of RMS was restricted to visually evoked responses and was not evident in neuronal activity associated with locomotion onset. Together, our results indicate that despite no apparent synaptic reorganization, stress exposure in adulthood can disrupt sensory processing in the PPC, with the effects showing remarkable individual variation.
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Affiliation(s)
- Soo Bin Park
- Department of Neurobiology and Behavior, University of California, Irvine, CA USA, 92697
| | - Gyorgy Lur
- Department of Neurobiology and Behavior, University of California, Irvine, CA USA, 92697
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3
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Lomeli N, Pearre DC, Cruz M, Di K, Ricks-Oddie JL, Bota DA. Cisplatin induces BDNF downregulation in middle-aged female rat model while BDNF enhancement attenuates cisplatin neurotoxicity. Exp Neurol 2024; 375:114717. [PMID: 38336286 PMCID: PMC11087041 DOI: 10.1016/j.expneurol.2024.114717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 01/04/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
Cancer-related cognitive impairments (CRCI) are neurological complications associated with cancer treatment, and greatly affect cancer survivors' quality of life. Brain-derived neurotrophic factor (BDNF) plays an essential role in neurogenesis, learning and memory. The reduction of BDNF is associated with the decrease in cognitive function in various neurological disorders. Few pre-clinical studies have reported on the effects of chemotherapy and medical stress on BDNF levels and cognition. The present study aimed to compare the effects of medical stress and cisplatin on serum BDNF levels and cognitive function in 9-month-old female Sprague Dawley rats to age-matched controls. Serum BDNF levels were collected longitudinally during cisplatin treatment, and cognitive function was assessed by novel object recognition (NOR) 14 weeks post-cisplatin initiation. Terminal BDNF levels were collected 24 weeks after cisplatin initiation. In cultured hippocampal neurons, we screened three neuroprotective agents, riluzole (an approved treatment for amyotrophic lateral sclerosis), as well as the ampakines CX546 and CX1739. We assessed dendritic arborization by Sholl analysis and dendritic spine density by quantifying postsynaptic density-95 (PSD-95) puncta. Cisplatin and exposure to medical stress reduced serum BDNF levels and impaired object discrimination in NOR compared to age-matched controls. Pharmacological BDNF augmentation protected neurons against cisplatin-induced reductions in dendritic branching and PSD-95. Ampakines (CX546 and CX1739) and riluzole did not affect the antitumor efficacy of cisplatin in vitro. In conclusion, we established the first middle-aged rat model of cisplatin-induced CRCI, assessing the contribution of medical stress and longitudinal changes in BDNF levels on cognitive function, although future studies are warranted to assess the efficacy of BDNF enhancement in vivo on synaptic plasticity. Collectively, our results indicate that cancer treatment exerts long-lasting changes in BDNF levels, and support BDNF enhancement as a potential preventative approach to target CRCI with therapeutics that are FDA approved and/or in clinical study for other indications.
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Affiliation(s)
- Naomi Lomeli
- Department of Neurology, University of California Irvine, Irvine, CA, USA
| | - Diana C Pearre
- Gynecologic Oncology, Providence Specialty Medical Group, Burbank, CA, USA
| | - Maureen Cruz
- Department of Neurology, University of California Irvine, Irvine, CA, USA
| | - Kaijun Di
- Department of Neurology, University of California Irvine, Irvine, CA, USA
| | - Joni L Ricks-Oddie
- Center for Statistical Consulting, Department of Statistics, University of California Irvine, Irvine, CA, USA; Biostatistics, Epidemiology and Research Design Unit, Institute for Clinical and Translational Sciences, University of California Irvine, Irvine, CA, USA
| | - Daniela A Bota
- Department of Neurology, University of California Irvine, Irvine, CA, USA; Chao Family Comprehensive Cancer Center, University of California Irvine, Irvine, CA, USA.
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4
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Hu P, Cao Q, Feng H, Liu Y, Chen Y, Xu J, Feng W, Sun H, Ding H, Wang C, Gao J, Xiao M. MicroRNA-451a is a candidate biomarker and therapeutic target for major depressive disorder. Gen Psychiatr 2024; 37:e101291. [PMID: 38304710 PMCID: PMC10831421 DOI: 10.1136/gpsych-2023-101291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 12/13/2023] [Indexed: 02/03/2024] Open
Abstract
Background Increasing evidence supports the role of microRNAs (miRNAs) in major depressive disorder (MDD), but the pathophysiological mechanism remains elusive. Aims To explore the mechanism of microRNA-451a (miR-451a) in the pathology and behaviours of depression. Methods Abnormal miRNAs such as miR-451a reported previously in the serum of patients with MDD were screened and then confirmed in a mouse model of depression induced by chronic restraint stress (CRS). Eight-week-old male C57BL/6 mice had miR-451a overexpression in the medial prefrontal cortex (mPFC) via adeno-associated virus serotype 9 vectors encoding a pri-mmu-miR-451a-GFP fusion protein followed by behavioural and pathological analyses. Finally, molecular biological experiments were conducted to investigate the potential mechanism of miR-451a against depression. Results The serum levels of miRNA-451a were significantly lower in patients with MDD, with a negative correlation with the Hamilton Depression Scale scores. Additionally, a negative association between serum miR-451a and behavioural despair or anhedonia was observed in CRS mice. Notably, miR-451a expression was significantly downregulated in the mPFC of CRS-susceptible mice. Overexpressing miR-451a in the mPFC reversed the loss of dendritic spines and the depression-like phenotype of CRS mice. Mechanistically, miR-451a could inhibit CRS-induced corticotropin-releasing factor receptor 1 expression via targeting transcription factor 2, subsequently protecting dendritic spine plasticity. Conclusions Together, these results highlighted miR-451a as a candidate biomarker and therapeutic target for MDD.
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Affiliation(s)
- Panpan Hu
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Qiuchen Cao
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hu Feng
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yun Liu
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yan Chen
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jingfan Xu
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Weixi Feng
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Huaiqing Sun
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Huachen Ding
- Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu, China
- Functional Brain Imaging Institute of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Chun Wang
- Nanjing Brain Hospital Affiliated to Nanjing Medical University, Nanjing, Jiangsu, China
- Functional Brain Imaging Institute of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Junying Gao
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ming Xiao
- Jiangsu Key Laboratory of Neurodegeneration, Nanjing Medical University, Nanjing, Jiangsu, China
- Functional Brain Imaging Institute of Nanjing Medical University, Nanjing, Jiangsu, China
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5
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Vandael D, Vints K, Baatsen P, Śliwińska MA, Gabarre S, De Groef L, Moons L, Rybakin V, Gounko NV. Cdk5-dependent rapid formation and stabilization of dendritic spines by corticotropin-releasing factor. Transl Psychiatry 2024; 14:29. [PMID: 38233378 PMCID: PMC10794228 DOI: 10.1038/s41398-024-02749-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 12/24/2023] [Accepted: 01/08/2024] [Indexed: 01/19/2024] Open
Abstract
The neuropeptide corticotropin-releasing factor (CRF) exerts a pivotal role in modulating neuronal activity in the mammalian brain. The effects of CRF exhibit notable variations, depending on factors such as duration of exposure, concentration, and anatomical location. In the CA1 region of the hippocampus, the impact of CRF is dichotomous: chronic exposure to CRF impairs synapse formation and dendritic integrity, whereas brief exposure enhances synapse formation and plasticity. In the current study, we demonstrate long-term effects of acute CRF on the density and stability of mature mushroom spines ex vivo. We establish that both CRF receptors are present in this hippocampal region, and we pinpoint their precise subcellular localization within synapses by electron microscopy. Furthermore, both in vivo and ex vivo data collectively demonstrate that a transient surge of CRF in the CA1 activates the cyclin-dependent kinase 5 (Cdk5)-pathway. This activation leads to a notable augmentation in CRF-dependent spine formation. Overall, these data suggest that upon acute release of CRF in the CA1-SR synapse, both CRF-Rs can be activated and promote synaptic plasticity via activating different downstream signaling pathways, such as the Cdk5-pathway.
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Affiliation(s)
- Dorien Vandael
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Katlijn Vints
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Pieter Baatsen
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Małgorzata A Śliwińska
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Sergio Gabarre
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium
| | - Lies De Groef
- KU Leuven, Leuven Brain Institute, Department of Biology, Animal Physiology and Neurobiology Division, Naamsestraat 61 box 2464, 3000, Leuven, Belgium
| | - Lieve Moons
- KU Leuven, Leuven Brain Institute, Department of Biology, Animal Physiology and Neurobiology Division, Naamsestraat 61 box 2464, 3000, Leuven, Belgium
| | - Vasily Rybakin
- National University of Singapore, Department of Microbiology and Immunology, Yng Loo Lin School of Medicine, and Immunology Program, 5 Science Drive 2, Blk MD4, 117545, Singapore, Singapore
| | - Natalia V Gounko
- VIB-KU Leuven Center for Brain & Disease Research, Electron Microscopy Platform & VIB-Bioimaging Core, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium.
- KU Leuven Department of Neurosciences, Leuven Brain Institute, O&N5 Herestraat 49 box 602, 3000, Leuven, Belgium.
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6
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König M, Berhe O, Ioannidis K, Orellana S, Davidson E, Kaser M, Moreno-López L, van Harmelen AL. The stress-buffering role of friendships in young people with childhood threat experiences: a preliminary report. Eur J Psychotraumatol 2023; 14:2281971. [PMID: 38154076 PMCID: PMC10990450 DOI: 10.1080/20008066.2023.2281971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 10/12/2023] [Indexed: 12/30/2023] Open
Abstract
Background: High-quality friendships have a positive impact on the mental health of young people with childhood adversity (CA). Social stress buffering, the phenomenon of a social partner attenuating acute stress responses, is a potential yet unexplored mechanism that may underlie this relationship.Objective: This study examined whether perceived friendship quality was related to better mental health and lower neural stress response in young people with CA.Method: A total of N = 102 young people (aged 16-26) with low to moderate CA were included in the study. We first investigated associations between friendship quality, mental health, and CA. In a representative subset (n = 62), we assessed neural stress responses using the Montreal Imaging Stress Task. In our sample, CA was best described along two dimensions resembling threat or deprivation like experiences. Hence, we investigated both cumulative and dimensional effects of CA.Results: We found no support for social thinning after CA, meaning that the severity of CA (cumulative or dimensional) did not differentially impact friendship quality. High-quality friendships, on the other hand, were strongly associated with better mental health. Furthermore, acute stress increased state anxiety and enhanced neural activity in five frontolimbic brain regions, including the left hippocampus. We found weak support that threat experiences interacted with friendship quality to predict left hippocampal reactivity to stress. However, this effect did not survive multiple comparison correction.Conclusion: The absence of social thinning in our sample may suggest that the risk of developing impoverished social networks is low for rather well-functioning young people with low to moderate CA. Regardless, our findings align with prior research, consistently showing a strong association between high-quality friendships and better mental health in young people with CA. Future research is needed to examine whether friendships aid neural stress responses in young people with childhood threat experiences.
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Affiliation(s)
- Maximilian König
- Institute of Education and Child Studies, Leiden University, Leiden, the Netherlands
| | - Oksana Berhe
- Department of Psychiatry and Psychotherapy, Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Mannheim, Germany
| | - Konstantinos Ioannidis
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Sofia Orellana
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Eugenia Davidson
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Muzaffer Kaser
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - RAISE Consortium
- Institute of Education and Child Studies, Leiden University, Leiden, the Netherlands
- Department of Psychiatry and Psychotherapy, Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Mannheim, Germany
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Laura Moreno-López
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
| | - Anne-Laura van Harmelen
- Institute of Education and Child Studies, Leiden University, Leiden, the Netherlands
- Department of Psychiatry, University of Cambridge School of Clinical Medicine, Addenbrooke’s Hospital, Cambridge, UK
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7
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Fahey L, Ali D, Donohoe G, Ó Broin P, Morris DW. Genes positively regulated by Mef2c in cortical neurons are enriched for common genetic variation associated with IQ and educational attainment. Hum Mol Genet 2023; 32:3194-3203. [PMID: 37672226 PMCID: PMC10630234 DOI: 10.1093/hmg/ddad142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/27/2023] [Accepted: 08/01/2023] [Indexed: 09/07/2023] Open
Abstract
The myocyte enhancer factor 2 C (MEF2C) gene encodes a transcription factor important for neurogenesis and synapse development and contains common variants associated with intelligence (IQ) and educational attainment (EA). Here, we took gene expression data from the mouse cortex of a Mef2c mouse model with a heterozygous DNA binding-deficient mutation of Mef2c (Mef2c-het) and combined these data with MEF2C ChIP-seq data from cortical neurons and single-cell data from the mouse brain. This enabled us to create a set of genes that were differentially regulated in Mef2c-het mice, represented direct target genes of MEF2C and had elevated in expression in cortical neurons. We found this gene-set to be enriched for genes containing common genetic variation associated with IQ and EA. Genes within this gene-set that were down-regulated, i.e. have reduced expression in Mef2c-het mice versus controls, were specifically significantly enriched for both EA and IQ associated genes. These down-regulated genes were enriched for functionality in the adenylyl cyclase signalling system, which is known to positively regulate synaptic transmission and has been linked to learning and memory. Within the adenylyl cyclase signalling system, three genes regulated by MEF2C, CRHR1, RGS6, and GABRG3, are associated at genome-wide significant levels with IQ and/or EA. Our results indicate that genetic variation in MEF2C and its direct target genes within cortical neurons contribute to variance in cognition within the general population, and the molecular mechanisms involved include the adenylyl cyclase signalling system's role in synaptic function.
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Affiliation(s)
- Laura Fahey
- Centre for Neuroimaging, Cognition and Genomics (NICOG), School of Biological and Chemical Sciences and School of Psychology, University of Galway, University Road, Galway, H91 CF50, Ireland
- Discipline of Bioinformatics, School of Mathematical and Statistical Sciences, University of Galway, University Road, Galway, H91 CF50, Ireland
| | - Deema Ali
- Centre for Neuroimaging, Cognition and Genomics (NICOG), School of Biological and Chemical Sciences and School of Psychology, University of Galway, University Road, Galway, H91 CF50, Ireland
| | - Gary Donohoe
- Centre for Neuroimaging, Cognition and Genomics (NICOG), School of Biological and Chemical Sciences and School of Psychology, University of Galway, University Road, Galway, H91 CF50, Ireland
| | - Pilib Ó Broin
- Discipline of Bioinformatics, School of Mathematical and Statistical Sciences, University of Galway, University Road, Galway, H91 CF50, Ireland
| | - Derek W Morris
- Centre for Neuroimaging, Cognition and Genomics (NICOG), School of Biological and Chemical Sciences and School of Psychology, University of Galway, University Road, Galway, H91 CF50, Ireland
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8
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Bjornson KJ, Vanderplow AM, Yang Y, Anderson DR, Kermath BA, Cahill ME. Stress-mediated dysregulation of the Rap1 small GTPase impairs hippocampal structure and function. iScience 2023; 26:107566. [PMID: 37664580 PMCID: PMC10470260 DOI: 10.1016/j.isci.2023.107566] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 05/15/2023] [Accepted: 08/02/2023] [Indexed: 09/05/2023] Open
Abstract
The effects of repeated stress on cognitive impairment are thought to be mediated, at least in part, by reductions in the stability of dendritic spines in brain regions critical for proper learning and memory, including the hippocampus. Small GTPases are particularly potent regulators of dendritic spine formation, stability, and morphology in hippocampal neurons. Through the use of small GTPase protein profiling in mice, we identify increased levels of synaptic Rap1 in the hippocampal CA3 region in response to escalating, intermittent stress. We then demonstrate that increased Rap1 in the CA3 is sufficient in and of itself to produce stress-relevant dendritic spine and cognitive phenotypes. Further, using super-resolution imaging, we investigate how the pattern of Rap1 trafficking to synapses likely underlies its effects on the stability of select dendritic spine subtypes. These findings illuminate the involvement of aberrant Rap1 regulation in the hippocampus in contributing to the psychobiological effects of stress.
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Affiliation(s)
- Kathryn J. Bjornson
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Amanda M. Vanderplow
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Yezi Yang
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Danielle R. Anderson
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Bailey A. Kermath
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Michael E. Cahill
- Department of Comparative Biosciences, University of Wisconsin-Madison, Madison, WI 53706, USA
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Holden JM, Wareham LK, Calkins DJ. Retinal astrocyte morphology predicts integration of vascular and neuronal architecture. Front Neurosci 2023; 17:1244679. [PMID: 37621717 PMCID: PMC10445659 DOI: 10.3389/fnins.2023.1244679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023] Open
Abstract
Astrocytes are important regulators of blood flow and play a key role in the response to injury and disease in the central nervous system (CNS). Despite having an understanding that structural changes to these cells have consequences for local neurovascular physiology, individual astrocyte morphology remains largely unexplored in the retina. Here, we used MORF3 mice to capture full membranous morphology for over fifteen hundred individual astrocytes in the mouse retina, a highly metabolically active component of the CNS. We demonstrate that retinal astrocytes have been misrepresented as stellate in morphology due to marker use like GFAP and S100β which underestimates cell complexity. We also find that astrocytes contain recurring morphological motifs which are predictive of the underlying neurovascular architecture of the inner retina and suggestive of function. These motifs predict fine sampling and integration of retinal ganglion cell electrical activity with consequences for blood flow regulation. Additionally, our data shows that astrocytes participate in neurovascular interactions to a much greater degree than currently reported. 100% of cells contact the vasculature through one of three mutually exclusive classes of connections. Similarly, 100% of cells contact some neuronal element, be it an RGC axon or soma. Finally, we report that astrocyte morphology depends on retinal eccentricity, with cells appearing compressed near the nerve head and in the periphery. These results reveal a large degree of astrocyte morphological complexity that informs their contribution to neurovascular coupling in the retina.
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Affiliation(s)
- Joseph M. Holden
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, TN, United States
- Vanderbilt Neuroscience Graduate Program, Vanderbilt University, Nashville, TN, United States
| | - Lauren K. Wareham
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, TN, United States
| | - David J. Calkins
- Department of Ophthalmology and Visual Sciences, Vanderbilt University Medical Center, Nashville, TN, United States
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Raise-Abdullahi P, Meamar M, Vafaei AA, Alizadeh M, Dadkhah M, Shafia S, Ghalandari-Shamami M, Naderian R, Afshin Samaei S, Rashidy-Pour A. Hypothalamus and Post-Traumatic Stress Disorder: A Review. Brain Sci 2023; 13:1010. [PMID: 37508942 PMCID: PMC10377115 DOI: 10.3390/brainsci13071010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
Humans have lived in a dynamic environment fraught with potential dangers for thousands of years. While fear and stress were crucial for the survival of our ancestors, today, they are mostly considered harmful factors, threatening both our physical and mental health. Trauma is a highly stressful, often life-threatening event or a series of events, such as sexual assault, war, natural disasters, burns, and car accidents. Trauma can cause pathological metaplasticity, leading to long-lasting behavioral changes and impairing an individual's ability to cope with future challenges. If an individual is vulnerable, a tremendously traumatic event may result in post-traumatic stress disorder (PTSD). The hypothalamus is critical in initiating hormonal responses to stressful stimuli via the hypothalamic-pituitary-adrenal (HPA) axis. Linked to the prefrontal cortex and limbic structures, especially the amygdala and hippocampus, the hypothalamus acts as a central hub, integrating physiological aspects of the stress response. Consequently, the hypothalamic functions have been attributed to the pathophysiology of PTSD. However, apart from the well-known role of the HPA axis, the hypothalamus may also play different roles in the development of PTSD through other pathways, including the hypothalamic-pituitary-thyroid (HPT) and hypothalamic-pituitary-gonadal (HPG) axes, as well as by secreting growth hormone, prolactin, dopamine, and oxytocin. This review aims to summarize the current evidence regarding the neuroendocrine functions of the hypothalamus, which are correlated with the development of PTSD. A better understanding of the role of the hypothalamus in PTSD could help develop better treatments for this debilitating condition.
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Affiliation(s)
| | - Morvarid Meamar
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
| | - Abbas Ali Vafaei
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
- Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Maryam Alizadeh
- Department of Basic Medical Sciences, Faculty of Medicine, Qom Medical Sciences, Islamic Azad University, Qom, Iran
| | - Masoomeh Dadkhah
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Sakineh Shafia
- Immunogenetics Research Center, Department of Physiology, Mazandaran University of Medical Sciences, Sari, Iran
| | | | - Ramtin Naderian
- Student Research Committee, Semnan University of Medical Sciences, Semnan, Iran
| | - Seyed Afshin Samaei
- Department of Neurology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
| | - Ali Rashidy-Pour
- Research Center of Physiology, Semnan University of Medical Sciences, Semnan, Iran
- Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
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11
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Hadipour M, Meftahi GH, Jahromi GP. Date palm spathe extract reverses chronic stress-induced changes in dendritic arborization in the amygdala and impairment of hippocampal long-term potentiation. Synapse 2023:e22278. [PMID: 37315214 DOI: 10.1002/syn.22278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/16/2023]
Abstract
Chronic restraint stress induces anxiety-like behaviors and emotional abnormalities via an alteration of synaptic remodeling in the amygdala and the hippocampus. Given that the date palm spathe has been shown to have neuroprotective effects on different experimental models, this study aimed to address whether the date palm spathe extract (hydroalcoholic extract of date palm spathe [HEDPP]) can reduce chronic restraint stress-induced behavioral, electrophysiological, and morphological changes in the rat model. Thirty-two male Wistar rats (weight 200-220 g) were randomly divided into control, stress, HEDPP, and stress + HEDPP for 14 days. Animals were submitted to restraint stress for 2 h per day for 14 consecutive days. The animals of the HEDPP and stress + HEDPP groups were supplemented with HEDPP (125 mg/kg) during these 14 days, 30 min before being placed in the restraint stress tube. We used passive avoidance, open-field test, and field potential recording to assess emotional memory, anxiety-like behavioral and long-term potentiation in the CA1 region of the hippocampus, respectively. Moreover, Golgi-Cox staining was used to investigate the amygdala neuron dendritic arborization. Results showed that stress induction was associated with behavioral changes (anxiety-like behavioral and emotional memory impairment), and the administration of HEDPP effectively normalized these deficits. HEDPP remarkably amplified the slope and amplitude of mean-field excitatory postsynaptic potentials (fEPSPs) in the CA1 area of the hippocampus in stressed rats. Chronic restraint stress significantly decreased the dendritic arborization in the central and basolateral nucleus of the amygdala neuron. HEDPP suppressed this stress effect in the central nucleus of the amygdala. Our findings indicated that HEDPP administration improves stress-induced learning impairment and memory and anxiety-like behaviors by preventing adverse effects on synaptic plasticity in the hippocampus and amygdala.
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Affiliation(s)
| | | | - Gila Pirzad Jahromi
- Neuroscience Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
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12
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Colquitt BM, Li K, Green F, Veline R, Brainard MS. Neural circuit-wide analysis of changes to gene expression during deafening-induced birdsong destabilization. eLife 2023; 12:e85970. [PMID: 37284822 PMCID: PMC10259477 DOI: 10.7554/elife.85970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 04/17/2023] [Indexed: 06/08/2023] Open
Abstract
Sensory feedback is required for the stable execution of learned motor skills, and its loss can severely disrupt motor performance. The neural mechanisms that mediate sensorimotor stability have been extensively studied at systems and physiological levels, yet relatively little is known about how disruptions to sensory input alter the molecular properties of associated motor systems. Songbird courtship song, a model for skilled behavior, is a learned and highly structured vocalization that is destabilized following deafening. Here, we sought to determine how the loss of auditory feedback modifies gene expression and its coordination across the birdsong sensorimotor circuit. To facilitate this system-wide analysis of transcriptional responses, we developed a gene expression profiling approach that enables the construction of hundreds of spatially-defined RNA-sequencing libraries. Using this method, we found that deafening preferentially alters gene expression across birdsong neural circuitry relative to surrounding areas, particularly in premotor and striatal regions. Genes with altered expression are associated with synaptic transmission, neuronal spines, and neuromodulation and show a bias toward expression in glutamatergic neurons and Pvalb/Sst-class GABAergic interneurons. We also found that connected song regions exhibit correlations in gene expression that were reduced in deafened birds relative to hearing birds, suggesting that song destabilization alters the inter-region coordination of transcriptional states. Finally, lesioning LMAN, a forebrain afferent of RA required for deafening-induced song plasticity, had the largest effect on groups of genes that were also most affected by deafening. Combined, this integrated transcriptomics analysis demonstrates that the loss of peripheral sensory input drives a distributed gene expression response throughout associated sensorimotor neural circuitry and identifies specific candidate molecular and cellular mechanisms that support the stability and plasticity of learned motor skills.
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Affiliation(s)
- Bradley M Colquitt
- Howard Hughes Medical InstituteChevy ChaseUnited States
- Department of Physiology, University of California, San FranciscoSan FranciscoUnited States
| | - Kelly Li
- Howard Hughes Medical InstituteChevy ChaseUnited States
- Department of Physiology, University of California, San FranciscoSan FranciscoUnited States
| | - Foad Green
- Howard Hughes Medical InstituteChevy ChaseUnited States
- Department of Physiology, University of California, San FranciscoSan FranciscoUnited States
| | - Robert Veline
- Howard Hughes Medical InstituteChevy ChaseUnited States
- Department of Physiology, University of California, San FranciscoSan FranciscoUnited States
| | - Michael S Brainard
- Howard Hughes Medical InstituteChevy ChaseUnited States
- Department of Physiology, University of California, San FranciscoSan FranciscoUnited States
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13
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Lomeli N, Pearre DC, Cruz M, Di K, Bota DA. Cisplatin Induces BDNF Downregulation in Middle-Aged Female Rat Model while BDNF Enhancement Attenuates Cisplatin Neurotoxicity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.15.540850. [PMID: 37293048 PMCID: PMC10245559 DOI: 10.1101/2023.05.15.540850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cancer-related cognitive impairments (CRCI) are debilitating consequences of cancer treatment with platinum agents (e.g., cisplatin) that greatly alter cancer survivors' health-related quality of life. Brain-derived neurotrophic factor (BDNF) plays an essential role in neurogenesis, learning, and memory, and the reduction of BDNF is associated with the development of cognitive impairment in various neurological disorders, including CRCI. Our previous CRCI rodent studies have shown that cisplatin reduces hippocampal neurogenesis and BDNF expression and increases hippocampal apoptosis, which is associated with cognitive impairments. Few studies have reported on the effects of chemotherapy and medical stress on serum BDNF levels and cognition in middle-aged female rat models. The present study aimed to compare the effects of medical stress and cisplatin on serum BDNF levels and cognitive performance in 9-month-old female Sprague Dawley rats to age-matched controls. Serum BDNF levels were collected longitudinally during cisplatin treatment, and cognitive function was assessed by novel object recognition (NOR) 14 weeks post-cisplatin initiation. Terminal BDNF levels were collected ten weeks after cisplatin completion. We also screened three BDNF-augmenting compounds, riluzole, ampakine CX546, and CX1739, for their neuroprotective effects on hippocampal neurons, in vitro . We assessed dendritic arborization by Sholl analysis and dendritic spine density by quantifying postsynaptic density-95 (PSD95) puncta. Cisplatin and exposure to medical stress reduced serum BDNF levels and impaired object discrimination in NOR compared to age-matched controls. Pharmacological BDNF augmentation protected neurons against cisplatin-induced reductions in dendritic branching and PSD95. Ampakines (CX546 and CX1739) but not riluzole altered the antitumor efficacy of cisplatin in two human ovarian cancer cell lines, OVCAR8 and SKOV3.ip1, in vitro. In conclusion, we established the first middle-aged rat model of cisplatin-induced CRCI, assessing the contribution of medical stress and longitudinal changes in BDNF levels with cognitive function. We conducted an in vitro screening of BDNF-enhancing agents to evaluate their potential neuroprotective effects against cisplatin-induced neurotoxicity and their effect on ovarian cancer cell viability.
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Zhou X, Yi W, Zhi Y, Yu J, Lu D, Luo Z, Yuan L, Chen L, Xu Z, Xu D. Stress-Activated Protein Kinase JNK Modulates Depression-like Behaviors in Mice. Mol Neurobiol 2023; 60:2367-2378. [PMID: 36650421 DOI: 10.1007/s12035-023-03209-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 01/04/2023] [Indexed: 01/19/2023]
Abstract
Stress is considered as a major cause of depression. C-Jun N-terminal kinase (JNK) is a member of the stress-induced mitogen activated protein (MAP) kinase family which is often activated through phosphorylation. Clinical studies and animal experiments have found that abnormal phosphorylation/activation of JNK exists in the occurrence of various psychiatric diseases. Recently, several studies linked JNK kinase activity to depression. However, whether excessive activation of JNK activity is directly responsible for the occurrence of depression and the underlying mechanisms remain unclear. Here, we constructed a conditional transgenic mouse which is specifically expressing MKK7-JNK1 (CAJNK1) in the central nervous system. CAJNK1 mice showed activation of JNK and lead to depression-like behavior in mice. Transcriptome analysis indicates reduced expression of synaptic-associated genes in CAJNK1 mice brains. Consistently, we found abnormal dendritic spine development and PSD95 downregulation in CAJNK1 hippocampal neurons. Our studies provide compelling evidence that activation of JNK as an intrinsic factor leading to depression-like behavior in mice provides direct clues for targeting the JNK activity as a potential therapeutic strategy for depression.
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Affiliation(s)
- Xiaokun Zhou
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China
- College of Biological Science and Engineering, Institute of Life Sciences, Fuzhou University, Fuzhou, 350108, China
| | - Wenxiang Yi
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou, 350108, China
| | - Yiqiang Zhi
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China
- College of Biological Science and Engineering, Institute of Life Sciences, Fuzhou University, Fuzhou, 350108, China
| | - Jurui Yu
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China
- College of Biological Science and Engineering, Institute of Life Sciences, Fuzhou University, Fuzhou, 350108, China
| | - Danping Lu
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhousong Luo
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China
| | - Ling Yuan
- Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, 410028, China
| | - Liyu Chen
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhiheng Xu
- State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Dan Xu
- Fujian Key Laboratory of Molecular Neurology, Institute of Neuroscience, Fujian Medical University, Fuzhou, 350005, China.
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15
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Fic E, Cieślik A, Figiel M, Dziedzicka-Wasylewska M. Identification of mitogen-activated protein kinase phosphatase-1 (MKP-1) protein partners using tandem affinity purification and mass spectrometry. Pharmacol Rep 2023; 75:474-481. [PMID: 36964420 PMCID: PMC10060364 DOI: 10.1007/s43440-023-00471-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/26/2023]
Abstract
BACKGROUND According to the World Health Organization Report, depressive disorders affect about 10% of the population. The molecular mechanism of the pathogenesis of depression is still not well understood. The new findings point to phosphatases as potential targets for effective depression therapy. The aim of the present work was the development of a method that would enable the identification of mitogen-activated protein kinase phosphatase-1 (MKP-1) protein partners using a proteomic approach. METHODS The research was carried out using the PC12 cell line, often used as a model for neurobiological research. The use of the procedure for efficient purification of protein complexes-tandem affinity purification (TAP) will facilitate the identification of proteins interacting with MKP-1, a potential goal of effective antidepressant therapy. RESULTS Identified proteins belong to various groups: cytoskeletal, ribosomal, nucleic acid binding, chaperones, and enzymes and may potentially be involved in the molecular mechanism of depression. CONCLUSIONS The presented protocol for the purification of protein complexes is universal and can be successfully used in different mammalian cell lines. Proteins identified in the present work have been reported in the literature concerning studies on depressive disorders, which speaks in favour of their role in depression.
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Affiliation(s)
- Ewelina Fic
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Cracow, Poland.
| | - Agata Cieślik
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Cracow, Poland
| | - Małgorzata Figiel
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Cracow, Poland
| | - Marta Dziedzicka-Wasylewska
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387, Cracow, Poland
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Mice deficient in synaptic protease neurotrypsin show impaired spaced long-term potentiation and blunted learning-induced modulation of dendritic spines. Cell Mol Life Sci 2023; 80:82. [PMID: 36871239 PMCID: PMC9986217 DOI: 10.1007/s00018-023-04720-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 01/21/2023] [Accepted: 02/06/2023] [Indexed: 03/06/2023]
Abstract
Neurotrypsin (NT) is a neuronal trypsin-like serine protease whose mutations cause severe mental retardation in humans. NT is activated in vitro by Hebbian-like conjunction of pre- and postsynaptic activities, which promotes the formation of dendritic filopodia via proteolytic cleavage of the proteoglycan agrin. Here, we investigated the functional importance of this mechanism for synaptic plasticity, learning, and extinction of memory. We report that juvenile neurotrypsin-deficient (NT-/-) mice exhibit impaired long-term potentiation induced by a spaced stimulation protocol designed to probe the generation of new filopodia and their conversion into functional synapses. Behaviorally, juvenile NT-/- mice show impaired contextual fear memory and have a sociability deficit. The latter persists in aged NT-/- mice, which, unlike juvenile mice, show normal recall but impaired extinction of contextual fear memories. Structurally, juvenile mutants exhibit reduced spine density in the CA1 region, fewer thin spines, and no modulation in the density of dendritic spines following fear conditioning and extinction in contrast to wild-type littermates. The head width of thin spines is reduced in both juvenile and aged NT-/- mice. In vivo delivery of adeno-associated virus expressing an NT-generated fragment of agrin, agrin-22, but not a shorter agrin-15, elevates the spine density in NT-/- mice. Moreover, agrin-22 co-aggregates with pre- and postsynaptic markers and increases the density and size of presynaptic boutons and presynaptic puncta, corroborating the view that agrin-22 supports the synaptic growth.
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Long KLP, Muroy SE, Sorooshyari SK, Ko MJ, Jaques Y, Sudmant P, Kaufer D. Transcriptomic profiles of stress susceptibility and resilience in the amygdala and hippocampus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.08.527777. [PMID: 36798395 PMCID: PMC9934702 DOI: 10.1101/2023.02.08.527777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
A single, severe episode of stress can bring about myriad responses amongst individuals, ranging from cognitive enhancement to debilitating and persistent anxiety; however, the biological mechanisms that contribute to resilience versus susceptibility to stress are poorly understood. The dentate gyrus (DG) of the hippocampus and the basolateral nucleus of the amygdala (BLA) are key limbic regions that are susceptible to the neural and hormonal effects of stress. Previous work has also shown that these regions contribute to individual variability in stress responses; however, the molecular mechanisms underlying the role of these regions in susceptibility and resilience are unknown. In this study, we profiled the transcriptomic signatures of the DG and BLA of rats with divergent behavioral outcomes after a single, severe stressor. We subjected rats to three hours of immobilization with exposure to fox urine and conducted a behavioral battery one week after stress to identify animals that showed persistent, high anxiety-like behavior. We then conducted bulk RNA sequencing of the DG and BLA from susceptible, resilient, and unexposed control rats. Differential gene expression analyses revealed that the molecular signatures separating each of the three groups were distinct and non-overlapping between the DG and BLA. In the amygdala, key genes associated with insulin and hormonal signaling corresponded with vulnerability. Specifically, Inhbb, Rab31 , and Ncoa3 were upregulated in the amygdala of stress-susceptible animals compared to resilient animals. In the hippocampus, increased expression of Cartpt - which encodes a key neuropeptide involved in reward, reinforcement, and stress responses - was strongly correlated with vulnerability to anxiety-like behavior. However, few other genes distinguished stress-susceptible animals from control animals, while a larger number of genes separated stress-resilient animals from control and stress-susceptible animals. Of these, Rnf112, Tbx19 , and UBALD1 distinguished resilient animals from both control and susceptible animals and were downregulated in resilience, suggesting that an active molecular response in the hippocampus facilitates protection from the long-term consequences of severe stress. These results provide novel insight into the mechanisms that bring about individual variability in the behavioral responses to stress and provide new targets for the advancement of therapies for stress-induced neuropsychiatric disorders.
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Acute gut inflammation reduces neural activity and spine maturity in hippocampus but not basolateral amygdala. Sci Rep 2022; 12:20169. [PMID: 36418891 PMCID: PMC9684565 DOI: 10.1038/s41598-022-24245-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 11/11/2022] [Indexed: 11/25/2022] Open
Abstract
Gastrointestinal tract (gut) inflammation increases stress and threat-coping behaviors, which are associated with altered activity in fear-related neural circuits, such as the basolateral amygdala and hippocampus. It remains to be determined whether inflammation from the gut affects neural activity by altering dendritic spines. We hypothesized that acute inflammation alters dendritic spines in a brain region-specific manner. Here we show that acute gut inflammation (colitis) evoked by dextran sodium sulfate (DSS) did not affect the overall spine density in the CA1 region of hippocampus, but increased the relative proportion of immature spines to mature spines on basal dendrites of pyramidal neurons. In contrast, in animals with colitis, no changes in spine density or composition on dendrites of pyramidal cells was observed in the basolateral amygdala. Rather, we observed decreased spine density on dendrites of stellate neurons, but not the relative proportions of mature vs immature spines. We used cFos expression evoked by the forced swim task as a measure of neural activity during stress and found no effect of DSS on the density of cFos immunoreactive neurons in basolateral amygdala. In contrast, fewer CA1 neurons expressed cFos in mice with colitis, relative to controls. Furthermore, CA1 cFos expression negatively correlated with active stress-coping in the swim task and was negatively correlated with gut inflammation. These data reveal that the effects of acute gut inflammation on synaptic remodeling depend on brain region, neuronal phenotype, and dendrite location. In the hippocampus, a shift to immature spines and hypoactivity are more strongly related to colitis-evoked behavioral changes than is remodeling in basolateral amygdala.
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Alizadeh-Ezdini Z, Vatanparast J. Differential impact of two paradigms of early-life adversity on behavioural responses to social defeat in young adult rats and morphology of CA3 pyramidal neurons. Behav Brain Res 2022; 435:114048. [PMID: 35952779 DOI: 10.1016/j.bbr.2022.114048] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 07/20/2022] [Accepted: 08/06/2022] [Indexed: 01/06/2023]
Abstract
Early life stress (ELS) is an important factor in programing the brain for future response to stress, and resilience or vulnerability to stress-induced emotional disorders. The hippocampal formation, with essential roles in both regulating the stress circuitry and emotionality, contributes to this adaptive programing. Here, we examined the effects of early handling (EH) and maternal deprivation (MD) as mild and intense postnatal stressors, respectively, on the behavioural responses to social defeat stress in young adulthood. We also evaluated the interaction of mild and intense ELS with later social defeat (SD) stress on the morphology and dendritic spine density of Golgi-cox-stained CA3 hippocampal neurons. SD stress in adult rats, as expected, increased anxiety and depressive-like behaviours in the open field, elevated plus-maze and forced swimming test. These effects were associated with reduction of dendritic spines and soma size of CA3 neurons. Both behavioural and structural alterations were significantly ameliorated in socially defeated rats that experienced early handling (EH-SD). Basal dendrites of CA3 neurons in EH-SD rats also showed longer dendrites and more intersections with Sholl circles in the distal portion, compared to both control and SD rats. On the other hand, in socially defeated rats with maternal deprivation experience (MD-SD) the stress-induced behavioural and structural alterations were generally intensified compared to SD rats. In MD-SD rats, apical dendrites of CA3 neurons demonstrated remarkable retraction; an effect that was not detected in SD rats. The reduction of dendritic spines density on the apical dendrites of CA3 neurons was also more pronounced in MD-SD rats compared to SD rats. Dendritic arbors and spines comprise the major neuronal substrate for the circuit connectivity, and cell region-specific alterations of dendrites and spines in CA3 neurons reveal plausible mechanisms that can underlie the impact of different ELSs on risk for affective disorders in response to social stress in adulthood.
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Affiliation(s)
| | - Jafar Vatanparast
- Department of Biology, School of Science, Shiraz University, Shiraz, Iran.
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20
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Auricular Vagus Nerve Stimulation Ameliorates Functional Dyspepsia with Depressive-Like Behavior and Inhibits the Hypothalamus-Pituitary-Adrenal Axis in a Rat Model. Dig Dis Sci 2022; 67:4719-4731. [PMID: 35064375 DOI: 10.1007/s10620-021-07332-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 11/12/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND The hypothalamus-pituitary-adrenal axis is the most important endocrine system to control irritability response. Functional dyspepsia (FD) is closely related to irritability. This study aimed to preliminarily explore the corticotropin-releasing factor (CRF) mechanism of auricular vagus nerve stimulation (aVNS) for FD model rats. METHODS Sprague-Dawley adult male rats were randomly divided into normal group, model group, aVNS group, and sham-aVNS group. Except for the normal rats, all other rats were induced into the FD model through tail-clamping stimulation for 3 weeks. Once the rat model was developed successfully, rats in the aVNS group and sham-aVNS group were intervened with aVNS or sham-aVNS for 2 weeks. No intervention was given to rats in the normal and model groups. The effect of aVNS was assessed. The expressions of hippocampal corticotropin-releasing hormone receptor 1 (CRHR1), hypothalamus CRF, adrenocorticotropic hormone (ACTH), and corticosterone in serum were assessed. RESULTS 1. Compared with normal rats, model-developing rats showed FD-like behavior. 2. Compared with model rats, rats in the aVNS group showed an improved general condition score and gastric motility, and increased horizontal and vertical motion scores. 3. The release of corticosterone, ACTH in serum, and CRF in the hypothalamus all increased in model rats but decreased with aVNS instead of sham-aVNS. 4. The expression of hippocampus CRHR1 was lower in model rats but higher in the aVNS group. CONCLUSION aVNS ameliorates gastric motility and improves the mental state in the FD-like rat, probably via inhibiting the CRF pathway.
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Ruf WP, Palmer A, Dörfer L, Wiesner D, Buck E, Grozdanov V, Kassubek J, Dimou L, Ludolph AC, Huber-Lang M, Danzer KM. Thoracic trauma promotes alpha-Synuclein oligomerization in murine Parkinson's disease. Neurobiol Dis 2022; 174:105877. [PMID: 36162738 DOI: 10.1016/j.nbd.2022.105877] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 09/20/2022] [Accepted: 09/23/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Systemic and neuroinflammatory processes play key roles in neurodegenerative diseases such as Parkinson's disease (PD). Physical trauma which induces considerable systemic inflammatory responses, represents an evident environmental factor in aging. However, little is known about the impact of physical trauma, on the immuno-pathophysiology of PD. Especially blunt chest trauma which is associated with a high morbidity and mortality rate in the elderly population, can induce a strong pulmonary and systemic inflammatory reaction. Hence, we sought out to combine a well-established thoracic trauma mouse model with a well-established PD mouse model to characterize the influence of physical trauma to neurodegenerative processes in PD. METHODS To study the influence of peripheral trauma in a PD mouse model we performed a highly standardized blunt thorax trauma in a well-established PD mouse model and determined the subsequent local and systemic response. RESULTS We could show that blunt chest trauma leads to a systemic inflammatory response which is quantifiable with increased inflammatory markers in bronchoalveolar fluids (BALF) and plasma regardless of the presence of a PD phenotype. A difference of the local inflammatory response in the brain between the PD group and non-PD group could be detected, as well as an increase in the formation of oligomeric pathological alpha-Synuclein (asyn) suggesting an interplay between peripheral thoracic trauma and asyn pathology in PD. CONCLUSION Taken together this study provides evidence that physical trauma is associated with increased asyn oligomerization in a PD mouse model underlining the relevance of PD pathogenesis under traumatic settings.
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Affiliation(s)
- Wolfgang P Ruf
- Department of Neurology, Ulm University, 89081 Ulm, Germany.
| | - Annette Palmer
- Institute of Experimental Trauma- Immunology, University Hospital of Ulm, Ulm, Germany.
| | - Lena Dörfer
- Institute of Experimental Trauma- Immunology, University Hospital of Ulm, Ulm, Germany
| | - Diana Wiesner
- German Center for Neurodegenerative Diseases (DNZE), 89081 Ulm, Germany.
| | - Eva Buck
- German Center for Neurodegenerative Diseases (DNZE), 89081 Ulm, Germany.
| | | | - Jan Kassubek
- Department of Neurology, Ulm University, 89081 Ulm, Germany; German Center for Neurodegenerative Diseases (DNZE), 89081 Ulm, Germany.
| | - Leda Dimou
- Molecular and Translational Neuroscience, Ulm University, 89081 Ulm, Germany.
| | - Albert C Ludolph
- Department of Neurology, Ulm University, 89081 Ulm, Germany; German Center for Neurodegenerative Diseases (DNZE), 89081 Ulm, Germany.
| | - Markus Huber-Lang
- Institute of Experimental Trauma- Immunology, University Hospital of Ulm, Ulm, Germany.
| | - Karin M Danzer
- Department of Neurology, Ulm University, 89081 Ulm, Germany; German Center for Neurodegenerative Diseases (DNZE), 89081 Ulm, Germany.
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22
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Chenani A, Weston G, Ulivi AF, Castello-Waldow TP, Huettl RE, Chen A, Attardo A. Repeated stress exposure leads to structural synaptic instability prior to disorganization of hippocampal coding and impairments in learning. Transl Psychiatry 2022; 12:381. [PMID: 36096987 PMCID: PMC9468341 DOI: 10.1038/s41398-022-02107-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/15/2022] [Accepted: 08/05/2022] [Indexed: 12/30/2022] Open
Abstract
Stress exposure impairs brain structure and function, resulting in cognitive deficits and increased risk for psychiatric disorders such as depression, schizophrenia, anxiety and post-traumatic stress disorder. In particular, stress exposure affects function and structure of hippocampal CA1 leading to impairments in episodic memory. Here, we applied longitudinal deep-brain optical imaging to investigate the link between changes in activity patterns and structural plasticity of dorsal CA1 pyramidal neurons and hippocampal-dependent learning and memory in mice exposed to stress. We found that several days of repeated stress led to a substantial increase in neuronal activity followed by disruption of the temporal structure of this activity and spatial coding. We then tracked dynamics of structural excitatory connectivity as a potential underlying cause of the changes in activity induced by repeated stress. We thus discovered that exposure to repeated stress leads to an immediate decrease in spinogenesis followed by decrease in spine stability. By comparison, acute stress led to stabilization of the spines born in temporal proximity to the stressful event. Importantly, the temporal relationship between changes in activity levels, structural connectivity and activity patterns, suggests that loss of structural connectivity mediates the transition between increased activity and impairment of temporal organization and spatial information content in dorsal CA1 upon repeated stress exposure.
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Affiliation(s)
| | - Ghabiba Weston
- Max Planck Institute of Psychiatry, 80804, Munich, Germany
- Graduate School of Systemic Neurosciences GSN-LMU, 82152, Munich, Germany
| | - Alessandro F Ulivi
- Max Planck Institute of Psychiatry, 80804, Munich, Germany
- Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany
| | | | | | - Alon Chen
- Max Planck Institute of Psychiatry, 80804, Munich, Germany
- Graduate School of Systemic Neurosciences GSN-LMU, 82152, Munich, Germany
- Weizmann Institute of Science, 76100, Rehovot, Israel
| | - Alessio Attardo
- Max Planck Institute of Psychiatry, 80804, Munich, Germany.
- Graduate School of Systemic Neurosciences GSN-LMU, 82152, Munich, Germany.
- Leibniz Institute for Neurobiology, 39118, Magdeburg, Germany.
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23
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Hokenson RE, Alam YH, Short AK, Jung S, Jang C, Baram TZ. Sex-dependent effects of multiple acute concurrent stresses on memory: a role for hippocampal estrogens. Front Behav Neurosci 2022; 16:984494. [PMID: 36160685 PMCID: PMC9492881 DOI: 10.3389/fnbeh.2022.984494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 08/16/2022] [Indexed: 11/26/2022] Open
Abstract
Memory disruption commonly follows chronic stress, whereas acute stressors are generally benign. However, acute traumas such as mass shootings or natural disasters—lasting minutes to hours and consisting of simultaneous physical, social, and emotional stresses—are increasingly recognized as significant risk factors for memory problems and PTSD. Our prior work has revealed that these complex stresses (concurrent multiple acute stresses: MAS) disrupt hippocampus-dependent memory in male rodents. In females, the impacts of MAS are estrous cycle-dependent: MAS impairs memory during early proestrus (high estrogens phase), whereas the memory of female mice stressed during estrus (low estrogens phase) is protected. Female memory impairments limited to high estrogens phases suggest that higher levels of estrogens are necessary for MAS to disrupt memory, supported by evidence that males have higher hippocampal estradiol than estrous females. To test the role of estrogens in stress-induced memory deficits, we blocked estrogen production using aromatase inhibitors. A week of blockade protected male and female mice from MAS-induced memory disturbances, suggesting that high levels of estrogens are required for stress-provoked memory impairments in both males and females. To directly quantify 17β-estradiol in murine hippocampus we employed both ELISA and mass spectrometry and identified significant confounders in both procedures. Taken together, the cross-cycle and aromatase studies in males and females support the role for high hippocampal estrogens in mediating the effect of complex acute stress on memory. Future studies focus on the receptors involved, the longevity of these effects, and their relation to PTSD-like behaviors in experimental models.
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Affiliation(s)
- Rachael E. Hokenson
- Department of Anatomy/Neurobiology, University of California, Irvine, Irvine, CA, United States
- *Correspondence: Rachael E. Hokenson
| | - Yasmine H. Alam
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA, United States
| | - Annabel K. Short
- Department of Anatomy/Neurobiology, University of California, Irvine, Irvine, CA, United States
- Department of Pediatrics, University of California, Irvine, Irvine, CA =, United States
| | - Sunhee Jung
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA, United States
| | - Cholsoon Jang
- Department of Biological Chemistry, University of California, Irvine, Irvine, CA, United States
| | - Tallie Z. Baram
- Department of Anatomy/Neurobiology, University of California, Irvine, Irvine, CA, United States
- Department of Pediatrics, University of California, Irvine, Irvine, CA =, United States
- Department of Neurology, University of California, Irvine, Irvine, CA, United States
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24
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Distinct proteomic profiles in prefrontal subareas of elderly major depressive disorder and bipolar disorder patients. Transl Psychiatry 2022; 12:275. [PMID: 35821008 PMCID: PMC9276790 DOI: 10.1038/s41398-022-02040-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 06/21/2022] [Accepted: 06/29/2022] [Indexed: 02/07/2023] Open
Abstract
We investigated for the first time the proteomic profiles both in the dorsolateral prefrontal cortex (DLPFC) and anterior cingulate cortex (ACC) of major depressive disorder (MDD) and bipolar disorder (BD) patients. Cryostat sections of DLPFC and ACC of MDD and BD patients with their respective well-matched controls were used for study. Proteins were quantified by tandem mass tag and high-performance liquid chromatography-mass spectrometry system. Gene Ontology terms and functional cluster alteration were analyzed through bioinformatic analysis. Over 3000 proteins were accurately quantified, with more than 100 protein expressions identified as significantly changed in these two brain areas of MDD and BD patients as compared to their respective controls. These include OGDH, SDHA and COX5B in the DLPFC in MDD patients; PFN1, HSP90AA1 and PDCD6IP in the ACC of MDD patients; DBN1, DBNL and MYH9 in the DLPFC in BD patients. Impressively, depending on brain area and distinct diseases, the most notable change we found in the DLPFC of MDD was 'suppressed energy metabolism'; in the ACC of MDD it was 'suppressed tissue remodeling and suppressed immune response'; and in the DLPFC of BD it was differentiated 'suppressed tissue remodeling and suppressed neuronal projection'. In summary, there are distinct proteomic changes in different brain areas of the same mood disorder, and in the same brain area between MDD and BD patients, which strengthens the distinct pathogeneses and thus treatment targets.
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25
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Urrutia-Ruiz C, Rombach D, Cursano S, Gerlach-Arbeiter S, Schoen M, Bockmann J, Demestre M, Boeckers TM. Deletion of the Autism-Associated Protein SHANK3 Abolishes Structural Synaptic Plasticity after Brain Trauma. Int J Mol Sci 2022; 23:ijms23116081. [PMID: 35682760 PMCID: PMC9181590 DOI: 10.3390/ijms23116081] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 12/14/2022] Open
Abstract
Autism spectrum disorders (ASDs) are characterized by repetitive behaviors and impairments of sociability and communication. About 1% of ASD cases are caused by mutations of SHANK3, a major scaffolding protein of the postsynaptic density. We studied the role of SHANK3 in plastic changes of excitatory synapses within the central nervous system by employing mild traumatic brain injury (mTBI) in WT and Shank3 knockout mice. In WT mice, mTBI triggered ipsi- and contralateral loss of hippocampal dendritic spines and excitatory synapses with a partial recovery over time. In contrast, no significant synaptic alterations were detected in Shank3∆11−/− mice, which showed fewer dendritic spines and excitatory synapses at baseline. In line, mTBI induced the upregulation of synaptic plasticity-related proteins Arc and p-cofilin only in WT mice. Interestingly, microglia proliferation was observed in WT mice after mTBI but not in Shank3∆11−/− mice. Finally, we detected TBI-induced increased fear memory at the behavioral level, whereas in Shank3∆11−/− animals, the already-enhanced fear memory levels increased only slightly after mTBI. Our data show the lack of structural synaptic plasticity in Shank3 knockout mice that might explain at least in part the rigidity of behaviors, problems in adjusting to new situations and cognitive deficits seen in ASDs.
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Affiliation(s)
- Carolina Urrutia-Ruiz
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Daniel Rombach
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Silvia Cursano
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Susanne Gerlach-Arbeiter
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Michael Schoen
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Juergen Bockmann
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Maria Demestre
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
| | - Tobias M. Boeckers
- Institute for Anatomy and Cell Biology, Albert Einstein Allee 11, 89081 Ulm, Germany; (C.U.-R.); (D.R.); (S.C.); (S.G.-A.); (M.S.); (J.B.); (M.D.)
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Translational Biochemistry, 89081 Ulm, Germany
- Correspondence: ; Tel.: +49-731-5002-3220
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26
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Maren S. Unrelenting Fear Under Stress: Neural Circuits and Mechanisms for the Immediate Extinction Deficit. Front Syst Neurosci 2022; 16:888461. [PMID: 35520882 PMCID: PMC9062589 DOI: 10.3389/fnsys.2022.888461] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 03/22/2022] [Indexed: 11/13/2022] Open
Abstract
Therapeutic interventions for disorders of fear and anxiety rely on behavioral approaches that reduce pathological fear memories. For example, learning that threat-predictive stimuli are no longer associated with aversive outcomes is central to the extinction of conditioned fear responses. Unfortunately, fear memories are durable, long-lasting, and resistant to extinction, particularly under high levels of stress. This is illustrated by the "immediate extinction deficit," which is characterized by a poor long-term reduction of conditioned fear when extinction procedures are attempted within hours of fear conditioning. Here, I will review recent work that has provided new insight into the neural mechanisms underlying resistance to fear extinction. Emerging studies reveal that locus coeruleus norepinephrine modulates amygdala-prefrontal cortical circuits that are critical for extinction learning. These data suggest that stress-induced activation of brain neuromodulatory systems biases fear memory at the expense of extinction learning. Behavioral and pharmacological strategies to reduce stress in patients undergoing exposure therapy might improve therapeutic outcomes.
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Affiliation(s)
- Stephen Maren
- Department of Psychological and Brain Sciences, Institute for Neuroscience, Texas A&M University, College Station, TX, United States
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27
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Zieglgänsberger W, Brenneisen R, Berthele A, Wotjak CT, Bandelow B, Tölle TR, Lutz B. Chronic Pain and the Endocannabinoid System: Smart Lipids - A Novel Therapeutic Option? Med Cannabis Cannabinoids 2022; 5:61-75. [PMID: 35702403 PMCID: PMC9149512 DOI: 10.1159/000522432] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 01/21/2022] [Indexed: 08/05/2023] Open
Abstract
The development of a high-end cannabinoid-based therapy is the result of intense translational research, aiming to convert recent discoveries in the laboratory into better treatments for patients. Novel compounds and new regimes for drug treatment are emerging. Given that previously unreported signaling mechanisms for cannabinoids have been uncovered, clinical studies detailing their high therapeutic potential are mandatory. The advent of novel genomic, optogenetic, and viral tracing and imaging techniques will help to further detail therapeutically relevant functional and structural features. An evolutionarily highly conserved group of neuromodulatory lipids, their receptors, and anabolic and catabolic enzymes are involved in a remarkable variety of physiological and pathological processes and has been termed the endocannabinoid system (ECS). A large body of data has emerged in recent years, pointing to a crucial role of this system in the regulation of the behavioral domains of acquired fear, anxiety, and stress-coping. Besides neurons, also glia cells and components of the immune system can differentially fine-tune patterns of neuronal activity. Dysregulation of ECS signaling can lead to a lowering of stress resilience and increased incidence of psychiatric disorders. Chronic pain may be understood as a disease process evoked by fear-conditioned nociceptive input and appears as the dark side of neuronal plasticity. By taking a toll on every part of your life, this abnormal persistent memory of an aversive state can be more damaging than its initial experience. All strategies for the treatment of chronic pain conditions must consider stress-related comorbid conditions since cognitive factors such as beliefs, expectations, and prior experience (memory of pain) are key modulators of the perception of pain. The anxiolytic and anti-stress effects of medical cannabinoids can substantially modulate the efficacy and tolerability of therapeutic interventions and will help to pave the way to a successful multimodal therapy. Why some individuals are more susceptible to the effects of stress remains to be uncovered. The development of personalized prevention or treatment strategies for anxiety and depression related to chronic pain must also consider gender differences. An emotional basis of chronic pain opens a new horizon of opportunities for developing treatment strategies beyond the repeated sole use of acutely acting analgesics. A phase I trial to determine the pharmacokinetics, psychotropic effects, and safety profile of a novel nanoparticle-based cannabinoid spray for oromucosal delivery highlights a remarkable innovation in galenic technology and urges clinical studies further detailing the huge therapeutic potential of medical cannabis (Lorenzl et al.; this issue).
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Affiliation(s)
| | | | | | | | - Borwin Bandelow
- Department of Psychiatry and Psychotherapy, University Medical Center, Göttingen, Germany
| | | | - Beat Lutz
- Institute of Physiological Chemistry, University Medical Center Mainz, Mainz, Germany
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28
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Stress vulnerability shapes disruption of motor cortical neuroplasticity. Transl Psychiatry 2022; 12:91. [PMID: 35246507 PMCID: PMC8897461 DOI: 10.1038/s41398-022-01855-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 02/06/2022] [Accepted: 02/08/2022] [Indexed: 02/06/2023] Open
Abstract
Chronic stress is a major cause of neuropsychiatric conditions such as depression. Stress vulnerability varies individually in mice and humans, measured by behavioral changes. In contrast to affective symptoms, motor retardation as a consequence of stress is not well understood. We repeatedly imaged dendritic spines of the motor cortex in Thy1-GFP M mice before and after chronic social defeat stress. Susceptible and resilient phenotypes were discriminated by symptom load and their motor learning abilities were assessed by a gross and fine motor task. Stress phenotypes presented individual short- and long-term changes in the hypothalamic-pituitary-adrenal axis as well as distinct patterns of altered motor learning. Importantly, stress was generally accompanied by a marked reduction of spine density in the motor cortex and spine dynamics depended on the stress phenotype. We found astrogliosis and altered microglia morphology along with increased microglia-neuron interaction in the motor cortex of susceptible mice. In cerebrospinal fluid, proteomic fingerprints link the behavioral changes and structural alterations in the brain to neurodegenerative disorders and dysregulated synaptic homeostasis. Our work emphasizes the importance of synaptic integrity and the risk of neurodegeneration within depression as a threat to brain health.
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29
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Xu B, Zhang X, He Y, Liu C, Li L, Liu Q, Huang Y, Chen M, Ren B, Guo Y, Chen Y. The impacts of early-life adversity on striatal and hippocampal memory functions. Neuroscience 2022; 490:11-24. [DOI: 10.1016/j.neuroscience.2022.02.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 02/02/2022] [Accepted: 02/25/2022] [Indexed: 12/15/2022]
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30
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Yang J, Dong HQ, Liu YH, Ji MH, Zhang X, Dai HY, Sun ZC, Liu L, Zhou J, Sha HH, Qian YN, Li QG, Yao H, Li NN. Laparotomy-Induced Peripheral Inflammation Activates NR2B Receptors on the Brain Mast Cells and Results in Neuroinflammation in a Vagus Nerve-Dependent Manner. Front Cell Neurosci 2022; 16:771156. [PMID: 35221919 PMCID: PMC8866729 DOI: 10.3389/fncel.2022.771156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 01/13/2022] [Indexed: 11/13/2022] Open
Abstract
Background: The pathophysiological mechanisms underlying postoperative cognitive dysfunction (POCD) remain unclear over the years. Neuroinflammation caused by surgery has been recognized as an important element in the development of POCD. Many studies also suggest that the vagus nerve plays an important role in transmitting peripheral injury signals to the central nervous system (CNS) and the resultant neuroinflammation. Previously, we have demonstrated that brain mast cells (BMCs), as the “first responders”, play a vital role in neuroinflammation and POCD. However, how the vagus nerve communicates with BMCs in POCD has not yet been clarified. Methods: In the current study, we highlighted the role of the vagus nerve as a conduction highway in surgery-induced neuroinflammation for the first time. In our model, we tested if mice underwent unilateral cervical vagotomy (VGX) had less neuroinflammation compared to the shams after laparotomy (LP) at an early stage. To further investigate the roles of mast cells and glutamate in the process, we employed KitW-sh mice and primary bone marrow-derived MCs to verify the glutamate-NR2B axis on MCs once again. Results: Our results demonstrated that there were higher levels of glutamate and BMCs activation as early as 4 h after LP. Meanwhile, vagotomy could partially block the increases and reduce neuroinflammation caused by peripheral inflammation during the acute phase. Excitingly, inhibition of NR2B receptor and knockout of mast cells can attenuateneuroinflammation induced by glutamate. Conclusion: Taken together, our findings indicate that the vagus is a high-speed pathway in the transmission of peripheral inflammation to the CNS. Activation of BMCs triggered a neuroinflammatory cascade. Inhibition of NR2B receptor on BMCs can reduce glutamate-induced BMCs activation, neuroinflammation, and memory impairment, suggesting a novel treatment strategy for POCD.
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Affiliation(s)
- Jing Yang
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hong-Quan Dong
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yan-Hu Liu
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Mu-Huo Ji
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xun Zhang
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hong-Yu Dai
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zhao-Chu Sun
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lu Liu
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jian Zhou
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Huan-Huan Sha
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yan-Ning Qian
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Qing-Guo Li
- Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hao Yao
- Department of Anesthesiology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Cardiovascular Center, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Na-Na Li
- Department of Anesthesiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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31
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Rigoni D, Avalos MP, Boezio MJ, Guzmán AS, Calfa GD, Perassi EM, Pierotti SM, Bisbal M, Garcia-Keller C, Cancela LM, Bollati F. Stress-induced vulnerability to develop cocaine addiction depends on cofilin modulation. Neurobiol Stress 2021; 15:100349. [PMID: 34169122 PMCID: PMC8209265 DOI: 10.1016/j.ynstr.2021.100349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 12/24/2022] Open
Abstract
Actin dynamics in dendritic spines can be associated with the neurobiological mechanisms supporting the comorbidity between stress exposure and cocaine increase rewards. The actin cytoskeleton remodeling in the nucleus accumbens (NA) has been implicated in the expression of stress-induced cross-sensitization with cocaine. The present study evaluates the involvement of cofilin, a direct regulator of actin dynamics, in the impact of stress on vulnerability to cocaine addiction. We assess whether the neurobiological mechanisms that modulate repeated-cocaine administration also occur in a chronic restraint stress-induced cocaine self-administration model. We also determine if chronic stress induces alterations in dendritic spines through dysregulation of cofilin activity in the NA core. Here, we show that the inhibition of cofilin expression in the NA core using viral short-hairpin RNA is sufficient to prevent the cocaine sensitization induced by chronic stress. The reduced cofilin levels also impede a-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor surface expression enhancement and promote the reduction of head diameter in animals pre-exposed to stress after a cocaine challenge in the NA core. Moreover, downregulation of cofilin expression prevents facilitation of the acquisition of cocaine self-administration (SA) in male rats pre-exposed to chronic stress without modifying performance in sucrose SA. These findings reveal a novel, crucial role for cofilin in the neurobiological mechanisms underpinning the comorbidity between stress exposure and addiction-related disorders.
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Affiliation(s)
- Daiana Rigoni
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Maria P. Avalos
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Maria J. Boezio
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Andrea S. Guzmán
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Gaston D. Calfa
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Eduardo M. Perassi
- Instituto de Investigaciones en Fisicoquímica de Córdoba (INFIQC), Departamento de Química Teórica y Computacional, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Silvia M. Pierotti
- Cátedra de Bioestadística I y II (Departamento de Matemática), Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Avenida Velez Sarfield 161, (5000), Córdoba, Argentina
| | - Mariano Bisbal
- Instituto de Investigación Médica Mercedes y Martin Ferreyra, INIMEC-CONICET, Universidad Nacional de Córdoba, Friuli 2434, Colinas de Vélez Sarsfield (5016) Córdoba, Argentina
| | - Constanza Garcia-Keller
- Department of Neuroscience, Medical University of South Carolina, 173 Ashley Avenue, Charleston, SC, 29425, USA
| | - Liliana M. Cancela
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
| | - Flavia Bollati
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Haya de la Torre and Medina Allende, Ciudad Universitaria, (5000), Córdoba, Argentina
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Chaves T, Fazekas CL, Horváth K, Correia P, Szabó A, Török B, Bánrévi K, Zelena D. Stress Adaptation and the Brainstem with Focus on Corticotropin-Releasing Hormone. Int J Mol Sci 2021; 22:ijms22169090. [PMID: 34445795 PMCID: PMC8396605 DOI: 10.3390/ijms22169090] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 12/13/2022] Open
Abstract
Stress adaptation is of utmost importance for the maintenance of homeostasis and, therefore, of life itself. The prevalence of stress-related disorders is increasing, emphasizing the importance of exploratory research on stress adaptation. Two major regulatory pathways exist: the hypothalamic–pituitary–adrenocortical axis and the sympathetic adrenomedullary axis. They act in unison, ensured by the enormous bidirectional connection between their centers, the paraventricular nucleus of the hypothalamus (PVN), and the brainstem monoaminergic cell groups, respectively. PVN and especially their corticotropin-releasing hormone (CRH) producing neurons are considered to be the centrum of stress regulation. However, the brainstem seems to be equally important. Therefore, we aimed to summarize the present knowledge on the role of classical neurotransmitters of the brainstem (GABA, glutamate as well as serotonin, noradrenaline, adrenaline, and dopamine) in stress adaptation. Neuropeptides, including CRH, might be co-localized in the brainstem nuclei. Here we focused on CRH as its role in stress regulation is well-known and widely accepted and other CRH neurons scattered along the brain may also complement the function of the PVN. Although CRH-positive cells are present on some parts of the brainstem, sometimes even in comparable amounts as in the PVN, not much is known about their contribution to stress adaptation. Based on the role of the Barrington’s nucleus in micturition and the inferior olivary complex in the regulation of fine motoric—as the main CRH-containing brainstem areas—we might assume that these areas regulate stress-induced urination and locomotion, respectively. Further studies are necessary for the field.
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Affiliation(s)
- Tiago Chaves
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Csilla Lea Fazekas
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Krisztina Horváth
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Pedro Correia
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Adrienn Szabó
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Bibiána Török
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Janos Szentagothai School of Neurosciences, Semmelweis University, 1083 Budapest, Hungary
| | - Krisztina Bánrévi
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
| | - Dóra Zelena
- Laboratory of Behavioural and Stress Studies, Institute of Experimental Medicine, 1083 Budapest, Hungary; (T.C.); (C.L.F.); (K.H.); (P.C.); (A.S.); (B.T.); (K.B.)
- Centre for Neuroscience, Szentágothai Research Centre, Institute of Physiology, Medical School, University of Pécs, 7624 Pécs, Hungary
- Correspondence:
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Conley MI, Skalaban LJ, Rapuano KM, Gonzalez R, Laird AR, Dick AS, Sutherland MT, Watts R, Casey B. Altered hippocampal microstructure and function in children who experienced Hurricane Irma. Dev Psychobiol 2021; 63:864-877. [PMID: 33325561 PMCID: PMC8206237 DOI: 10.1002/dev.22071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 10/31/2020] [Accepted: 11/25/2020] [Indexed: 01/12/2023]
Abstract
Hurricane Irma was the most powerful Atlantic hurricane in recorded history, displacing 6 million and killing over 120 people in the state of Florida alone. Unpredictable disasters like Irma are associated with poor cognitive and health outcomes that can disproportionately impact children. This study examined the effects of Hurricane Irma on the hippocampus and memory processes previously related to unpredictable stress. We used an innovative application of an advanced diffusion-weighted imaging technique, restriction spectrum imaging (RSI), to characterize hippocampal microstructure (i.e., cell density) in 9- to 10-year-old children who were exposed to Hurricane Irma relative to a non-exposed control group (i.e., assessed the year before Hurricane Irma). We tested the hypotheses that the experience of Hurricane Irma would be associated with decreases in: (a) hippocampal cellularity (e.g., neurogenesis), based on known associations between unpredictable stress and hippocampal alterations; and (b) hippocampal-related memory function as indexed by delayed recall. We show an association between decreased hippocampal cellularity and delayed recall memory in children who experienced Hurricane Irma relative to those who did not. These findings suggest an important role of RSI for assessing subtle microstructural changes related to functionally significant changes in the developing brain in response to environmental events.
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Affiliation(s)
- May I. Conley
- Department of PsychologyYale UniversityNew HavenCTUSA
| | | | | | - Raul Gonzalez
- Department of PsychologyFlorida International UniversityMiamiFLUSA
| | - Angela R. Laird
- Department of PhysicsFlorida International UniversityMiamiFLUSA
| | | | | | - Richard Watts
- Department of PsychologyYale UniversityNew HavenCTUSA
| | - B.J. Casey
- Department of PsychologyYale UniversityNew HavenCTUSA
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Floriou-Servou A, von Ziegler L, Waag R, Schläppi C, Germain PL, Bohacek J. The Acute Stress Response in the Multiomic Era. Biol Psychiatry 2021; 89:1116-1126. [PMID: 33722387 DOI: 10.1016/j.biopsych.2020.12.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 12/13/2020] [Accepted: 12/30/2020] [Indexed: 12/18/2022]
Abstract
Studying the stress response is a major pillar of neuroscience research not only because stress is a daily reality but also because the exquisitely fine-tuned bodily changes triggered by stress are a neuroendocrinological marvel. While the genome-wide changes induced by chronic stress have been extensively studied, we know surprisingly little about the complex molecular cascades triggered by acute stressors, the building blocks of chronic stress. The acute stress (or fight-or-flight) response mobilizes organismal energy resources to meet situational demands. However, successful stress coping also requires the efficient termination of the stress response. Maladaptive coping-particularly in response to severe or repeated stressors-can lead to allostatic (over)load, causing wear and tear on tissues, exhaustion, and disease. We propose that deep molecular profiling of the changes triggered by acute stressors could provide molecular correlates for allostatic load and predict healthy or maladaptive stress responses. We present a theoretical framework to interpret multiomic data in light of energy homeostasis and activity-dependent gene regulation, and we review the signaling cascades and molecular changes rapidly induced by acute stress in different cell types in the brain. In addition, we review and reanalyze recent data from multiomic screens conducted mainly in the rodent hippocampus and amygdala after acute psychophysical stressors. We identify challenges surrounding experimental design and data analysis, and we highlight promising new research directions to better understand the stress response on a multiomic level.
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Affiliation(s)
- Amalia Floriou-Servou
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland
| | - Lukas von Ziegler
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland
| | - Rebecca Waag
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland
| | - Christa Schläppi
- Computational Neurogenomics, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland
| | - Pierre-Luc Germain
- Computational Neurogenomics, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland; Laboratory of Statistical Bioinformatics, Department for Molecular Life Sciences, University of Zürich, Zürich, Switzerland.
| | - Johannes Bohacek
- Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Department of Health Sciences and Technology, ETH Zürich, Switzerland; Neuroscience Center Zurich, ETH Zurich and University of Zurich, Zürich, Switzerland.
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Fariborzi M, Park SB, Ozgur A, Lur G. Sex-dependent long-term effects of prepubescent stress on the posterior parietal cortex. Neurobiol Stress 2021; 14:100295. [PMID: 33521171 PMCID: PMC7820135 DOI: 10.1016/j.ynstr.2021.100295] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/03/2021] [Accepted: 01/04/2021] [Indexed: 12/31/2022] Open
Abstract
Adolescence is a time of intense cortical development and a period of heightened sensitivity to insult. To determine how sex affects the short- and long-term outcomes of early-adolescent stress exposure, we subjected prepubescent (postnatal day 30) male and female mice to repeated multiple concurrent stressors (RMS). In the posterior parietal cortex (PPC), RMS caused the elimination of excitatory synapses in deeper layers while inhibitory synapse density was predominantly diminished in superficial layers. These short-term effects coincided with reduced visuo-spatial working memory and were similar in both sexes. The loss of excitatory synapses and impaired working memory persisted in males past a 30-day recovery period. In contrast, we observed a remarkable recovery of excitatory transmission and behavioral performance in females. Inhibitory synapse density recovered in both sexes. We have also observed a late onset anxiety phenotype in RMS exposed females that was absent in males. Overall, our results indicate that there are marked sex differences in the long-term effects of prepubescent stress on cortical synapses and behavior.
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Affiliation(s)
- Mona Fariborzi
- Department of Neurobiology and Behavior, University of California, 1215 McGaugh Hall, Irvine, CA, 92697, USA
| | - Soo Bin Park
- Department of Neurobiology and Behavior, University of California, 1215 McGaugh Hall, Irvine, CA, 92697, USA
| | - Ali Ozgur
- Department of Neurobiology and Behavior, University of California, 1215 McGaugh Hall, Irvine, CA, 92697, USA
| | - Gyorgy Lur
- Department of Neurobiology and Behavior, University of California, 1215 McGaugh Hall, Irvine, CA, 92697, USA
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36
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Zheng Y, Zhang YM, Tang ZS, Du JK, Guo DW, Xu YJ, Sheng H, Lu JQ, Ni X. Spatial learning and memory deficits induced by prenatal glucocorticoid exposure depend on hippocampal CRHR1 and CXCL5 signaling in rats. J Neuroinflammation 2021; 18:85. [PMID: 33810797 PMCID: PMC8019183 DOI: 10.1186/s12974-021-02129-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/12/2021] [Indexed: 11/13/2022] Open
Abstract
Background Prenatal synthetic glucocorticoid (sGC) exposure increases the susceptibility to cognitive and affective disorders in postnatal life. We previously demonstrated that prenatal sGC exposure results in an increase in corticotropin-releasing hormone (CRH) receptor type 1 (CRHR1) expression in the hippocampus of rats, and CRHR1 is involved in synapse formation via regulation of C-X-C chemokine ligand 5 (CXCL5) in hippocampus. We sought to investigate that the roles of CRHR1 and CXCL5 in learning and memory impairment caused by prenatal sGC exposure. Methods Pregnant rats were administered with saline or dexamethasone (DEX) from gestational day (GD) 14 to GD21. DEX offspring at 2-day old were treated with saline and CRHR1 antagonists (antalarmin and CP154526) for 7 days. Some DEX offspring received intra-hippocampal injection of AAV9 carrying CXCL5 gene. Spatial learning and memory was assessed by Morris water maze test. Immunofluorescence analysis was applied to show synapsin I and PSD95 signals in hippocampus. Synapsin I and PSD95 protein level and CXCL5 concentration were determined by western blotting and ELISA, respectively. Organotypic hippocampal slice cultures were used to investigate the effect of DEX on CXCL5 production in vitro. Results Both male and female DEX offspring displayed impairment of spatial learning and memory in adulthood. Synapsin I and PSD95 signals and CXCL5 levels were decreased in DEX offspring. DEX offspring with antalarmin and CP154526 treatment showed improved spatial learning and memory. Antalarmin and CP154526 treatment increased synapsin I and PSD95 signals and CXCL5 concentration in hippocampus. Bilaterally hippocampal injection of AAV9 carrying CXCL5 gene improved the spatial learning and memory and increased CXCL5 concentration and synapsin I and PSD95 levels in hippocampus. DEX dose-dependently suppressed CXCL5 production in cultured hippocammpal slices, which was prevented by antalarmin treatment. Conclusion CRHR1 and CXCL5 signaling in the hippocampus are involved in spatial learning and memory deficits caused by prenatal DEX exposure. CRHR1 activation contributes to decreased CXCL5 production in hippocampus induced by prenatal DEX treatment. Our study provides a molecular basis of prenatal GC exposure programming spatial learning and memory.
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Affiliation(s)
- You Zheng
- Department of Gynecology and Obstetrics and Research Center for Molecular Metabolomics, Xiangya Hospital Central South University, Changsha, 410008, China.,Department of Physiology, Navy Medical University, Shanghai, 200433, China.,Laboratory of Cell Engineering, Institute of Biotechnology, Beijing, 100071, China
| | - Yan-Min Zhang
- Department of Physiology, Navy Medical University, Shanghai, 200433, China.,School of Kinesiology, Shanghai University of Sport, Shanghai, 200438, China
| | - Zheng-Shan Tang
- Department of Gynecology and Obstetrics and Research Center for Molecular Metabolomics, Xiangya Hospital Central South University, Changsha, 410008, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital Central South University, Changsha, 410008, China
| | - Jian-Kui Du
- Department of Gynecology and Obstetrics and Research Center for Molecular Metabolomics, Xiangya Hospital Central South University, Changsha, 410008, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital Central South University, Changsha, 410008, China
| | - De-Wei Guo
- Department of Gynecology and Obstetrics and Research Center for Molecular Metabolomics, Xiangya Hospital Central South University, Changsha, 410008, China
| | - Yong-Jun Xu
- Department of Physiology, Navy Medical University, Shanghai, 200433, China
| | - Hui Sheng
- Department of Physiology, Navy Medical University, Shanghai, 200433, China
| | - Jian-Qiang Lu
- School of Kinesiology, Shanghai University of Sport, Shanghai, 200438, China
| | - Xin Ni
- Department of Gynecology and Obstetrics and Research Center for Molecular Metabolomics, Xiangya Hospital Central South University, Changsha, 410008, China. .,Department of Physiology, Navy Medical University, Shanghai, 200433, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital Central South University, Changsha, 410008, China.
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37
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Hokenson RE, Short AK, Chen Y, Pham AL, Adams ET, Bolton JL, Swarup V, Gall CM, Baram TZ. Unexpected Role of Physiological Estrogen in Acute Stress-Induced Memory Deficits. J Neurosci 2021; 41:648-662. [PMID: 33262247 PMCID: PMC7842761 DOI: 10.1523/jneurosci.2146-20.2020] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 11/16/2020] [Accepted: 11/18/2020] [Indexed: 11/22/2022] Open
Abstract
Stress may promote emotional and cognitive disturbances, which differ by sex. Adverse outcomes, including memory disturbances, are typically observed following chronic stress, but are now being recognized also after short events, including mass shootings, assault, or natural disasters, events that consist of concurrent multiple acute stresses (MAS). Prior work has established profound and enduring effects of MAS on memory in males. Here we examined the effects of MAS on female mice and probed the role of hormonal fluctuations during the estrous cycle on MAS-induced memory problems and the underlying brain network and cellular mechanisms. Female mice were impacted by MAS in an estrous cycle-dependent manner: MAS impaired hippocampus-dependent spatial memory in early-proestrous mice, characterized by high levels of estradiol, whereas memory of mice stressed during estrus (low estradiol) was spared. As spatial memory requires an intact dorsal hippocampal CA1, we examined synaptic integrity in mice stressed at different cycle phases and found a congruence of dendritic spine density and spatial memory deficits, with reduced spine density only in mice stressed during high estradiol cycle phases. Assessing MAS-induced activation of brain networks interconnected with hippocampus, we identified differential estrous cycle-dependent activation of memory- and stress-related regions, including the amygdala. Network analyses of the cross-correlation of fos expression among these regions uncovered functional connectivity that differentiated impaired mice from those not impaired by MAS. In conclusion, the estrous cycle modulates the impact of MAS on spatial memory, and fluctuating physiological levels of sex hormones may contribute to this effect.SIGNIFICANCE STATEMENT: Effects of stress on brain functions, including memory, are profound and sex-dependent. Acute stressors occurring simultaneously result in spatial memory impairments in males, but effects on females are unknown. Here we identified estrous cycle-dependent effects of such stresses on memory in females. Surprisingly, females with higher physiological estradiol experienced stress-induced memory impairment and a loss of underlying synapses. Memory- and stress-responsive brain regions interconnected with hippocampus were differentially activated across high and low estradiol mice, and predicted memory impairment. Thus, at functional, network, and cellular levels, physiological estradiol influences the effects of stress on memory in females, providing insight into mechanisms of prominent sex differences in stress-related memory disorders, such as post-traumatic stress disorder.
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Affiliation(s)
| | | | | | | | | | | | | | - Christine M Gall
- Departments of Anatomy and Neurobiology
- Neurobiology and Behavior
| | - Tallie Z Baram
- Departments of Anatomy and Neurobiology
- Pediatrics
- Neurology, University of California-Irvine, Irvine, California 92697
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38
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Developmental outcomes of early adverse care on amygdala functional connectivity in nonhuman primates. Dev Psychopathol 2021; 32:1579-1596. [PMID: 33427167 DOI: 10.1017/s0954579420001133] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Despite the strong link between childhood maltreatment and psychopathology, the underlying neurodevelopmental mechanisms are poorly understood and difficult to disentangle from heritable and prenatal factors. This study used a translational macaque model of infant maltreatment in which the adverse experience occurs in the first months of life, during intense maturation of amygdala circuits important for stress and emotional regulation. Thus, we examined the developmental impact of maltreatment on amygdala functional connectivity (FC) longitudinally, from infancy through the juvenile period. Using resting state functional magnetic resonance imaging (MRI) we performed amygdala-prefrontal cortex (PFC) region-of-interest and exploratory whole-brain amygdala FC analyses. The latter showed (a) developmental increases in amygdala FC with many regions, likely supporting increased processing of socioemotional-relevant stimuli with age; and (b) maltreatment effects on amygdala coupling with arousal and stress brain regions (locus coeruleus, laterodorsal tegmental area) that emerged with age. Maltreated juveniles showed weaker FC than controls, which was negatively associated with infant hair cortisol concentrations. Findings from the region-of-interest analysis also showed weaker amygdala FC with PFC regions in maltreated animals than controls since infancy, whereas bilateral amygdala FC was stronger in maltreated animals. These effects on amygdala FC development may underlie the poor behavioral outcomes associated with this adverse experience.
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39
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He Y, Xu B, Chen Y, Liu L, Xu L, Chen Y, Long D. Early-life adversity selectively interrupts the dendritic differentiation of dorsolateral striatal neurons in male mice. Brain Struct Funct 2021; 226:397-414. [PMID: 33386419 DOI: 10.1007/s00429-020-02183-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 11/24/2020] [Indexed: 01/04/2023]
Abstract
The effects of early-life adversity (ELA) on dendritic differentiation of striatal neurons were investigated in the dorsal striatum including the dorsomedial striatum and dorsolateral striatum (DMS and DLS, respectively). An animal model of ELA was created by changing the growth environment of newborn mouse pups by giving limited bedding and nesting materials from postnatal day 2 to day 9 (P2-P9). One week after the stress paradigm (P16), the dendritic branches and spines of striatal spiny neurons as well as the synapses represented by postsynaptic density protein-95 (PSD-95) in DMS and DLS were stereologically analyzed. Adverse experience in early life selectively affected the spiny neurons in DLS, leading to abundant proximal dendritic branches and an increased number of filopodia-like protrusions, but a reduced number of dendritic spines. The selective effects of stress on neurons in DLS were further identified by reduced expression of PSD-95, including a reduced optical density of PSD-95 immunoreactivity and fewer individual PSD-95 immunoreactive synapses in this region. Notably, stress in early life affected either D1 or D2 dopamine receptor-expressing DLS neurons. These findings suggest that adverse early-life experience delayed the maturation of dendritic spines on neurons in the dorsolateral striatum. Altered dendritic differentiation provoked by stress in early life may contribute critically to the formation of proper neuronal circuits in the dorsal striatum and, therefore, affect striatum-dependent habitual behavior and emotional function later in life.
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Affiliation(s)
- Yun He
- Department of Human Anatomy, School of Basic Medical Sciences, Yangtze University, Hubei, 434023, China
| | - Benke Xu
- Department of Human Anatomy, School of Basic Medical Sciences, Yangtze University, Hubei, 434023, China.,Jingzhou Central Hospital, The Second Clinical Medical College, Yangtze University, Hubei, 434020, China
| | - Yan Chen
- Department of Rehabilitation Medicine, The Second Affiliated Hospital, Guangzhou Medical University, Guangdong, 510260, China
| | - Lian Liu
- Department of Medical Function, School of Basic Medical Sciences, Yangtze University, Hubei, 434023, China
| | - Liping Xu
- Key Lab of Neuroscience, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Yuncai Chen
- Department of Pediatrics, University of California, Irvine, CA, 92697, USA.
| | - Dahong Long
- Key Lab of Neuroscience, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, 511436, China.
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40
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Alviña K, Jodeiri Farshbaf M, Mondal AK. Long term effects of stress on hippocampal function: Emphasis on early life stress paradigms and potential involvement of neuropeptide Y. J Neurosci Res 2021; 99:57-66. [PMID: 32162350 DOI: 10.1002/jnr.24614] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/06/2020] [Accepted: 02/27/2020] [Indexed: 01/06/2023]
Abstract
The brain is both central in orchestrating the response to stress, and, a very sensitive target when such response is not controlled. In fact, stress has long been associated with the onset and/or exacerbation of several neuropsychiatric disorders such as anxiety, depression, and drug addiction. The hippocampus is a key brain region involved in the response to stress, not only due to its anatomical connections with the hypothalamic-pituitary-adrenal axis but also as a major target of stress mediators. The hippocampal dentate gyrus (DG)-CA3 circuit, composed of DG granule cells axons (mossy fibers) synapsing onto CA3 pyramidal cells, plays an essential role in memory encoding and retrieval, functions that are vulnerable to stress. Although naturally excitatory, this circuit is under the inhibitory control of GABAergic interneurons that maintain the excitation/inhibition balance. One subgroup of such interneurons produces neuropeptide Y (NPY), which has emerged as a promising endogenous stress "resilience molecule" due to its anxiolytic and anti-epileptic properties. Here we examine existing evidence that reveals a potential role for hilar NPY+ interneurons in mediating stress-induced changes in hippocampal function. We will focus specifically on rodent models of early life stress (ELS), defined as adverse conditions during the early postnatal period that can have profound consequences for neurodevelopment. Collectively, these findings suggest that the long-lasting effects of ELS might stem from the loss of GABAergic NPY+ cells, which then can lead to reduced inhibition in the DG-CA3 pathway. Such change might then lead to hyperexcitability and concomitant hippocampal-dependent behavioral deficits.
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Affiliation(s)
- Karina Alviña
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
- Department of Neuroscience, University of Florida, Gainesville, FL, USA
| | | | - Amit Kumar Mondal
- Department of Biological Sciences, Texas Tech University, Lubbock, TX, USA
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41
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Cursano S, Battaglia CR, Urrutia-Ruiz C, Grabrucker S, Schön M, Bockmann J, Braumüller S, Radermacher P, Roselli F, Huber-Lang M, Boeckers TM. A CRHR1 antagonist prevents synaptic loss and memory deficits in a trauma-induced delirium-like syndrome. Mol Psychiatry 2021; 26:3778-3794. [PMID: 32051550 PMCID: PMC8550963 DOI: 10.1038/s41380-020-0659-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Revised: 01/10/2020] [Accepted: 01/20/2020] [Indexed: 12/15/2022]
Abstract
Older patients with severe physical trauma are at high risk of developing neuropsychiatric syndromes with global impairment of cognition, attention, and consciousness. We employed a thoracic trauma (TxT) mouse model and thoroughly analyzed age-dependent spatial and temporal posttraumatic alterations in the central nervous system. Up to 5 days after trauma, we observed a transient 50% decrease in the number of excitatory synapses specifically in hippocampal pyramidal neurons accompanied by alterations in attention and motor activity and disruption of contextual memory consolidation. In parallel, hippocampal corticotropin-releasing hormone (CRH) expression was highly upregulated, and brain-derived neurotrophic factor (BDNF) levels were significantly reduced. In vitro experiments revealed that CRH application induced neuronal autophagy with rapid lysosomal degradation of BDNF via the NF-κB pathway. The subsequent synaptic loss was rescued by BDNF as well as by specific NF-κB and CRH receptor 1 (CRHR1) antagonists. In vivo, the chronic application of a CRHR1 antagonist after TxT resulted in reversal of the observed histological, molecular, and behavioral alterations. The data suggest that neuropsychiatric syndromes (i.e., delirium) after peripheral trauma might be at least in part due to the activation of the hippocampal CRH/NF-κB/BDNF pathway, which results in a dramatic loss of synaptic contacts. The successful rescue by stress hormone receptor antagonists should encourage clinical trials focusing on trauma-induced delirium and/or other posttraumatic syndromes.
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Affiliation(s)
- Silvia Cursano
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany ,International Graduate School in Molecular Medicine, IGradU, 89081 Ulm, Germany
| | - Chiara R. Battaglia
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany ,International Graduate School in Molecular Medicine, IGradU, 89081 Ulm, Germany
| | - Carolina Urrutia-Ruiz
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Stefanie Grabrucker
- grid.10049.3c0000 0004 1936 9692Department of Biological Sciences, University of Limerick, Limerick, V94 PH61 Ireland
| | - Michael Schön
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Jürgen Bockmann
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Sonja Braumüller
- grid.6582.90000 0004 1936 9748Institute for Anesthesiological Pathophysiology, Ulm University, Helmholtzstr. 8/1, 89081 Ulm, Germany
| | - Peter Radermacher
- grid.6582.90000 0004 1936 9748Institute for Anesthesiological Pathophysiology, Ulm University, Helmholtzstr. 8/1, 89081 Ulm, Germany
| | - Francesco Roselli
- grid.6582.90000 0004 1936 9748Clinic for Neurology, Ulm University, 89081 Ulm, Germany
| | - Markus Huber-Lang
- grid.6582.90000 0004 1936 9748Institute of Clinical and Experimental Trauma-Immunology, Ulm University, 89081 Ulm, Germany
| | - Tobias M. Boeckers
- grid.6582.90000 0004 1936 9748Institute for Anatomy and Cell Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
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Lv Y, Chen P, Kuang L, Han Z, Solanki B, Zhou W, Tao F, Chen R, Yao Y. Role of corticotropin-releasing hormone in the impact of chronic stress during pregnancy on inducing depression in male offspring mice. Brain Res 2020; 1747:147029. [PMID: 32717275 DOI: 10.1016/j.brainres.2020.147029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 07/14/2020] [Accepted: 07/20/2020] [Indexed: 11/16/2022]
Affiliation(s)
- Yili Lv
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China
| | - Peng Chen
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China
| | - Liang Kuang
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China
| | - Zhenmin Han
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China
| | - Bhawna Solanki
- Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK
| | - Weiju Zhou
- Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK
| | - Fangbiao Tao
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Anhui Provincial Key Laboratory of Population Health & Aristogenics, Hefei, Anhui 230032, China
| | - Ruoling Chen
- Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK.
| | - Yuyou Yao
- School of Public Health, Anhui Medical University, Hefei, Anhui 230032, China; Faculty of Education, Health and Wellbeing, University of Wolverhampton, Wolverhampton WV1 1LY, UK; Anhui Provincial Key Laboratory of Population Health & Aristogenics, Hefei, Anhui 230032, China.
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He ZX, Song HF, Liu TY, Ma J, Xing ZK, Yin YY, Liu L, Zhang YN, Zhao YF, Yu HL, He XX, Guo WX, Zhu XJ. HuR in the Medial Prefrontal Cortex is Critical for Stress-Induced Synaptic Dysfunction and Depressive-Like Symptoms in Mice. Cereb Cortex 2020; 29:2737-2747. [PMID: 30843060 DOI: 10.1093/cercor/bhz036] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/05/2019] [Accepted: 02/12/2019] [Indexed: 12/16/2022] Open
Abstract
Chronic stress has been observed to increase the risk of developing depression and induce neuronal alterations of synaptic plasticity, yet the underlying molecular mechanisms remain unclear. Here, we found that the ubiquitously expressed RNA-binding protein HuR was up-regulated in the medial prefrontal cortex (mPFC) of mice following chronic stress. In adult mice, AAV-Cre-mediated knockout of HuR in the mPFC prevented anxiety-like and depression-like behaviors induced by chronic stress. HuR was also required for the stress-induced dendritic spine loss and synaptic transmission deficits. Moreover, HuRflox/flox;Nex-Cre mice, which induce HuR loss of function from embryonic development, exhibited enhanced synaptic functions. Notably, we ascertained RhoA signaling to be regulated by HuR and involved in the modulation of structural synaptic plasticity in response to chronic stress. Our results demonstrate HuR is a critical modulator for the regulation of stress-induced synaptic plasticity alterations and depression, providing a potential therapeutic target for the treatment of depressive disorders.
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Affiliation(s)
- Zi-Xuan He
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Hui-Fang Song
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Ting-Yu Liu
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Jun Ma
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Zhen-Kai Xing
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Yue-Yue Yin
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Lin Liu
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Yan-Ning Zhang
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Yi-Fei Zhao
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Hua-Li Yu
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Xiao-Xiao He
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Wei-Xiang Guo
- State Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Science, Beijing, China
| | - Xiao-Juan Zhu
- Key laboratory of Molecular Epigenetics Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
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Lyons CE, Bartolomucci A. Stress and Alzheimer's disease: A senescence link? Neurosci Biobehav Rev 2020; 115:285-298. [PMID: 32461080 PMCID: PMC7483955 DOI: 10.1016/j.neubiorev.2020.05.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 04/11/2020] [Accepted: 05/18/2020] [Indexed: 12/13/2022]
Abstract
Chronic stress has been shown to promote numerous aging-related diseases, and to accelerate the aging process itself. Of particular interest is the impact of stress on Alzheimer's disease (AD), the most prevalent form of dementia. The vast majority of AD cases have no known genetic cause, making it vital to identify the environmental factors involved in the onset and progression of the disease. Age is the greatest risk factor for AD, and measures of biological aging such as shorter telomere length, significantly increase likelihood for developing AD. Stress is also considered a crucial contributor to AD, as indicated by a formidable body of research, although the mechanisms underlying this association remain unclear. Here we review human and animal literature on the impact of stress on AD and discuss the mechanisms implicated in the interaction. In particular we will focus on the burgeoning body of research demonstrating that senescent cells, which accumulate with age and actively drive a number of aging-related diseases, may be a key mechanism through which stress drives AD.
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Affiliation(s)
- Carey E Lyons
- Department of Integrative Biology and Physiology, University of Minnesota, United States; Graduate Program in Neuroscience, University of Minnesota, United States.
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Demaestri C, Pan T, Critz M, Ofray D, Gallo M, Bath KG. Type of early life adversity confers differential, sex-dependent effects on early maturational milestones in mice. Horm Behav 2020; 124:104763. [PMID: 32407728 PMCID: PMC7487052 DOI: 10.1016/j.yhbeh.2020.104763] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 03/16/2020] [Accepted: 04/23/2020] [Indexed: 12/24/2022]
Abstract
Early life adversity (ELA) increases risk for negative health outcomes, with sex disparities in prevalence and form of ELA experienced and risk for neuropsychiatric pathology. ELA comes in many forms (e.g. parental neglect/loss, limited access to resources) but whether disparate forms of ELA have common effects on outcomes, and if males and females are equally affected, remains unknown. Epidemiological studies often fail to accurately account for differences in type, timing, and duration of adversity experienced. Rodent models allow precise control of many of these variables. However, differences in the form of ELA, species, strain, housing, and testing paradigms used may contribute to differences in outcomes leading to questions of whether differences are the result of the form of ELA or these other variables. Here, we directly compared two mouse models of ELA, maternal separation (MS) and limited bedding (LB) in males and females on development of the body, motor and visual milestones, stress physiology, and anxiety-like behavior. LB affected timing of early milestones, somatic growth, and stress physiology in both sexes, yet only females showed later anxiety-like behaviors. MS rearing affected males and females similarly in early milestone development, yet only males showed changes in stress physiology and anxiety-like outcomes. These studies provide a platform to directly compare MS and LB models within one lab. The current work advances our understanding of the unique features of ELA that shape early neurodevelopmental events and risk for later pathology, increasing the translational relevance of these ELA models.
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Affiliation(s)
- Camila Demaestri
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA
| | - Tracy Pan
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA
| | - Madalyn Critz
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA
| | - Dayshalis Ofray
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA
| | - Meghan Gallo
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA
| | - Kevin G Bath
- Department of Cognitive, Linguistic, and Psychological Sciences, 190 Thayer St., Box 1821, Brown University, Providence, RI 02912, USA.
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46
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Memory dysfunction and anxiety-like behavior in a mouse model of chronic sleep disorders. Biochem Biophys Res Commun 2020; 529:175-179. [DOI: 10.1016/j.bbrc.2020.05.218] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 05/31/2020] [Indexed: 01/12/2023]
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47
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Vasconcelos M, Stein DJ, Gallas-Lopes M, Landau L, de Almeida RMM. Corticotropin-releasing factor receptor signaling and modulation: implications for stress response and resilience. TRENDS IN PSYCHIATRY AND PSYCHOTHERAPY 2020; 42:195-206. [PMID: 32696892 DOI: 10.1590/2237-6089-2018-0027] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 09/25/2019] [Indexed: 11/22/2022]
Abstract
Introduction In addition to their role in regulation of the hypothalamic-pituitary-adrenal-axis, corticotropin-releasing factor (CRF) and its related peptides, the urocortins, are important mediators of physiological and pathophysiological processes of the central nervous, cardiovascular, gastrointestinal, immune, endocrine, reproductive, and skin systems. Altered regulation of CRF-mediated adaptive responses to various stressful stimuli disrupts healthy function and might confer vulnerability to several disorders, including depression and anxiety. Methodology This narrative review was conducted through search and analysis of studies retrieved from online databases using a snowball method. Results This review covers aspects beginning with the discovery of CRF, CRF binding protein and their actions via interaction with CRF receptors type 1 and type 2. These are surface plasma membrane receptors, activation of which is associated with conformational changes and interaction with a variety of G-proteins and signaling pathways. We also reviewed the pharmacology and mechanisms of the receptor signaling modulatory activity of these receptors. Conclusion This review compiles and presents knowledge regarding the CRFergic system, including CRF related peptides, CRF binding protein, and CRF receptors, as well as some evidence that is potentially indicative of the biological roles of these entities in several physiological and pathophysiological processes.
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Affiliation(s)
- Mailton Vasconcelos
- Instituto de Psicologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Dirson J Stein
- Hospital de Clínicas de Porto Alegre, UFRGS, Porto Alegre, RS, Brazil
| | - Matheus Gallas-Lopes
- Instituto de Psicologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Luane Landau
- Instituto de Psicologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Rosa Maria M de Almeida
- Instituto de Psicologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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48
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Craig E, Dillingham CM, Milczarek MM, Phillips HM, Davies M, Perry JC, Vann SD. Lack of change in CA1 dendritic spine density or clustering in rats following training on a radial-arm maze task. Wellcome Open Res 2020; 5:68. [PMID: 32500097 PMCID: PMC7236580 DOI: 10.12688/wellcomeopenres.15745.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2020] [Indexed: 11/20/2022] Open
Abstract
Background: Neuronal plasticity is thought to underlie learning and memory formation. The density of dendritic spines in the CA1 region of the hippocampus has been repeatedly linked to mnemonic processes. Both the number and spatial location of the spines, in terms of proximity to nearest neighbour, have been implicated in memory formation. To examine how spatial training impacts synaptic structure in the hippocampus, Lister-Hooded rats were trained on a hippocampal-dependent spatial task in the radial-arm maze. Methods: One group of rats were trained on a hippocampal-dependent spatial task in the radial arm maze. Two further control groups were included: a yoked group which received the same sensorimotor stimulation in the radial-maze but without a memory load, and home-cage controls. At the end of behavioural training, the brains underwent Golgi staining. Spines on CA1 pyramidal neuron dendrites were imaged and quantitatively assessed to provide measures of density and distance from nearest neighbour. Results: There was no difference across behavioural groups either in terms of spine density or in the clustering of dendritic spines. Conclusions: Spatial learning is not always accompanied by changes in either the density or clustering of dendritic spines on the basal arbour of CA1 pyramidal neurons when assessed using Golgi imaging.
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Affiliation(s)
- Emma Craig
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
| | | | | | | | - Moira Davies
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
| | - James C. Perry
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
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49
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Dendritic remodeling of D1 neurons by RhoA/Rho-kinase mediates depression-like behavior. Mol Psychiatry 2020; 25:1022-1034. [PMID: 30120419 PMCID: PMC6378138 DOI: 10.1038/s41380-018-0211-5] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 05/24/2018] [Accepted: 06/18/2018] [Indexed: 12/20/2022]
Abstract
Depression alters the structure and function of brain reward circuitry. Preclinical evidence suggests that medium spiny neurons (MSNs) in the nucleus accumbens (NAc) undergo structural plasticity; however, the molecular mechanism and behavioral significance is poorly understood. Here we report that atrophy of D1, but not D2 receptor containing MSNs is strongly associated with social avoidance in mice subject to social defeat stress. D1-MSN atrophy is caused by cell-type specific upregulation of the GTPase RhoA and its effector Rho-kinase. Pharmacologic and genetic reduction of activated RhoA prevents depressive outcomes to stress by preventing loss of D1-MSN dendritic arbor. Pharmacologic and genetic promotion of activated RhoA enhances depressive outcomes by reducing D1-MSN dendritic arbor and is sufficient to promote depressive-like behaviors in the absence of stress. Chronic treatment with Rho-kinase inhibitor Y-27632 after chronic social defeat stress reverses depression-like behaviors by restoring D1-MSN dendritic complexity. Taken together, our data indicate functional roles for RhoA and Rho-kinase in mediating depression-like behaviors via dendritic remodeling of NAc D1-MSNs and may prove a useful target for new depression therapeutics.
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50
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Craig E, Dillingham CM, Milczarek MM, Phillips HM, Davies M, Perry JC, Vann SD. Lack of change in CA1 dendritic spine density or clustering in rats following training on a radial-arm maze task. Wellcome Open Res 2020; 5:68. [PMID: 32500097 PMCID: PMC7236580 DOI: 10.12688/wellcomeopenres.15745.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2020] [Indexed: 03/29/2024] Open
Abstract
Background: Neuronal plasticity is thought to underlie learning and memory formation. The density of dendritic spines in the CA1 region of the hippocampus has been repeatedly linked to mnemonic processes. Both the number and spatial location of the spines, in terms of proximity to nearest neighbour, have been implicated in memory formation. To examine how spatial training impacts synaptic structure in the hippocampus, Lister-Hooded rats were trained on a hippocampal-dependent spatial task in the radial-arm maze. Methods: One group of rats were trained on a hippocampal-dependent spatial task in the radial arm maze. Two further control groups were included: a yoked group which received the same sensorimotor stimulation in the radial-maze but without a memory load, and home-cage controls. At the end of behavioural training, the brains underwent Golgi staining. Spines on CA1 pyramidal neuron dendrites were imaged and quantitatively assessed to provide measures of density and distance from nearest neighbour. Results: There was no difference across behavioural groups either in terms of spine density or in the clustering of dendritic spines. Conclusions: Spatial learning is not always accompanied by changes in either the density or clustering of dendritic spines on the basal arbour of CA1 pyramidal neurons when assessed using Golgi imaging.
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Affiliation(s)
- Emma Craig
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
| | | | | | | | - Moira Davies
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
| | - James C Perry
- School of Psychology, Cardiff University, Cardiff, CF10 3AT, UK
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