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Changes in dendritic arborization related to the estrous cycle in pyramidal neurons of layer V of the motor cortex. J Chem Neuroanat 2021; 119:102042. [PMID: 34800658 DOI: 10.1016/j.jchemneu.2021.102042] [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: 03/19/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 11/22/2022]
Abstract
Many studies on neuronal plasticity have been conducted in the hippocampus and sensory cortices. In female rats in the estrus phase, when there is a low concentration of estradiol in the blood, there is a reduction in the dendritic spine density of CA1 neurons, while an increase in dendritic spines has been observed during metestrus, when progesterone levels are high. In comparison with the hippocampus, less information is known about dendritic remodeling of the motor cortex. Thus, the objective of the present study was to evaluate the neuronal morphology of pyramidal cells of layer V of the motor cortex in each phase of the estrous cycle. For this, we used Long-Evans strain rats and formed 4 experimental groups according to the phase of the estrous cycle at the moment of sacrifice: proestrus, estrus, metestrus, or diestrus. All animals were gently monitored regarding the expression of one estrous cycle in order to determine the regularity of the cycle. We obtained the brains in order to evaluate the neuronal morphology of neurons of layer V of the primary motor cortex following the Golgi-Cox method and Sholl analysis. Our results show that the dendritic arborization of neurons of rats sacrificed in the metestrus phase is reduced compared to the other phases of the estrous cycle. However, we did not find changes in dendritic spine density between experimental groups. When comparing our results with previous data, we can suggest that estrogens and progesterone differentially promote plasticity events in pyramidal neurons between different brain regions.
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Picó-Pérez M, Moreira PS, de Melo Ferreira V, Radua J, Mataix-Cols D, Sousa N, Soriano-Mas C, Morgado P. Modality-specific overlaps in brain structure and function in obsessive-compulsive disorder: Multimodal meta-analysis of case-control MRI studies. Neurosci Biobehav Rev 2020; 112:83-94. [PMID: 32006553 DOI: 10.1016/j.neubiorev.2020.01.033] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 01/03/2020] [Accepted: 01/27/2020] [Indexed: 10/25/2022]
Abstract
Neuroimaging research has shown that patients with obsessive-compulsive disorder (OCD) may present brain structural and functional alterations, but the results across imaging modalities and task paradigms are difficult to reconcile. Are the same brain systems that are structurally different in OCD patients also involved in executive function and emotional processing? To answer this, we conducted separate meta-analyses of voxel-based morphometry studies, executive function functional magnetic resonance imaging (fMRI) studies, and emotional processing fMRI studies. Next, with a multimodal approach (conjunction analysis), we identified the common alterations across meta-analyses. Patients presented increased gray matter volume and hyperactivation in the putamen, but the putamen subregions affected differed depending on the psychological process. Left posterior/dorsal putamen showed hyperactivation during executive processing tasks, while predominantly right anterior/ventral putamen showed hyperactivation during emotional processing tasks. Interestingly, age was significantly associated with increased right putamen volume. Finally, the left dorsolateral prefrontal cortex was hyperactive in both functional domains. Our findings highlight task-specific correlates of brain structure and function in OCD and help integrate a growing literature.
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Affiliation(s)
- Maria Picó-Pérez
- Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Pedro Silva Moreira
- Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Vanessa de Melo Ferreira
- Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joaquim Radua
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain; Centre for Psychiatric Research and Education, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Psychosis Studies, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; Mental Health Research Networking Center (CIBERSAM), Barcelona, Spain
| | - David Mataix-Cols
- Centre for Psychiatric Research and Education, Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal; Clinical Academic Center - Braga, Braga, Portugal
| | - Carles Soriano-Mas
- Mental Health Research Networking Center (CIBERSAM), Barcelona, Spain; Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Spain; Department of Psychobiology and Methodology of Health Sciences, Universitat Autònoma de Barcelona, Spain.
| | - Pedro Morgado
- Life and Health Sciences Research Institute (ICVS), University of Minho, Braga, Portugal; ICVS/3B's, PT Government Associate Laboratory, Braga/Guimarães, Portugal; Clinical Academic Center - Braga, Braga, Portugal.
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Villanueva Espino LA, Silva Gómez AB, Bravo Durán DA. Cognitive training increases dendritic arborization in the dorsal hippocampal CA1 and CA3 neurons of female and male Long–Evans rats. Synapse 2019; 74:e22140. [DOI: 10.1002/syn.22140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/04/2019] [Accepted: 10/09/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Luis Alberto Villanueva Espino
- Laboratorio de Neurofisiología Experimental Facultad de Ciencias Biológicas Benemérita Universidad Autónoma de Puebla Puebla Mexico
| | - Adriana Berenice Silva Gómez
- Laboratorio de Neurofisiología Experimental Facultad de Ciencias Biológicas Benemérita Universidad Autónoma de Puebla Puebla Mexico
| | - Dolores Adriana Bravo Durán
- Laboratorio de Neurofisiología Experimental Facultad de Ciencias Biológicas Benemérita Universidad Autónoma de Puebla Puebla Mexico
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Lin WC, Chen HL, Hsu TW, Hsu CC, Huang YC, Tsai NW, Lu CH. Correlation between Dopamine Transporter Degradation and Striatocortical Network Alteration in Parkinson's Disease. Front Neurol 2017; 8:323. [PMID: 28769862 PMCID: PMC5511968 DOI: 10.3389/fneur.2017.00323] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 06/21/2017] [Indexed: 11/13/2022] Open
Abstract
The association between dopamine neuron loss and functional change in the striatocortical network was analyzed in 31 patients with Parkinson's disease (PD) [mean disease duration 4.03 ± 4.20 years; Hoehn and Yahr (HY) stage 2.2 ± 1.2] and 37 age-matched normal control subjects. We performed 99mTc-TRODAT-1 SPECT/CT imaging to detect neuron losses and resting-state functional magnetic resonance imaging to detect functional changes. Mean striatal dopamine transporter binding ratios were determined by region of interest analysis. The functional connectivity correlation coefficient (fc-cc) was determined in six striatal subregions, and interactions between these binding ratios and the striatocortical fc-cc values were analyzed. The PD patients had significant functional network alterations in all striatal subregions. Lower striatal dopamine transporter binding correlated significantly with lower fc-cc values in the superior medial frontal (SMF) lobe and superior frontal lobe and higher fc-cc values in the cerebellum and parahippocampus. The difference in fc-cc between the ventral inferior striatum and SMF lobe was significantly correlated with increased disease duration (r = -0.533, P = 0.004), higher HY stage (r = -0.431, P = 0.020), and lower activities of daily living score (r = 0.369, P = 0.049). The correlation of frontostriatal network changes with clinical manifestations suggests that fc-cc may serve as a surrogate marker of disease progression.
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Affiliation(s)
- Wei-Che Lin
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Hsiu-Ling Chen
- Department of Diagnostic Radiology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Tun-Wei Hsu
- Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Chien-Chin Hsu
- Department of Nuclear Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Yung-Cheng Huang
- Department of Nuclear Medicine, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Nai-Wen Tsai
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Cheng-Hsien Lu
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Cano M, Martínez-Zalacaín I, Bernabéu-Sanz Á, Contreras-Rodríguez O, Hernández-Ribas R, Via E, de Arriba-Arnau A, Gálvez V, Urretavizcaya M, Pujol J, Menchón JM, Cardoner N, Soriano-Mas C. Brain volumetric and metabolic correlates of electroconvulsive therapy for treatment-resistant depression: a longitudinal neuroimaging study. Transl Psychiatry 2017; 7:e1023. [PMID: 28170003 PMCID: PMC5438019 DOI: 10.1038/tp.2016.267] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 10/12/2016] [Accepted: 11/13/2016] [Indexed: 02/08/2023] Open
Abstract
Recent research suggests that neuroplastic and neuroinflammatory changes may account for the mode of action of electroconvulsive therapy (ECT), although extant data do not allow for a clear disambiguation between these two hypotheses. Multimodal neuroimaging approaches (for example, combining structural and metabolic information) may help in clarifying this issue. Here we aimed to assess longitudinal changes in (i) regional gray matter (GM) volumes and (ii) hippocampal metabolite concentrations throughout an acute course of bitemporal ECT, as well as (iii) to determine the association between imaging changes and clinical improvement. We assessed 12 patients with treatment-resistant depression (TRD) at four time points (pre-treatment, after the first ECT session, after the ninth ECT session and 15 days after ECT course completion) and 10 healthy participants at two time points, 5 weeks apart. Patients with TRD showed bilateral medial temporal lobe (MTL) and perigenual anterior cingulate cortex volume increases. Left MTL volume increase was associated with (i) a hippocampal N-acetylaspartate concentration decrease, (ii) a hippocampal Glutamate+Glutamine concentration increase and (iii) significant clinical improvement. The observed findings are, in part, compatible with both neuroplastic and neuroinflammatory changes induced by ECT. We postulate that such phenomena may be interrelated, therefore reconciling the neuroplasticity and neuroinflammatory hypotheses of ECT action.
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Affiliation(s)
- M Cano
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Department of Clinical Sciences, School of Medicine, University of Barcelona, Barcelona, Spain
| | - I Martínez-Zalacaín
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain
| | - Á Bernabéu-Sanz
- Magnetic Resonance Department, Inscanner SL, Alicante, Spain
| | - O Contreras-Rodríguez
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Carlos III Health Institute, CIBERSAM, Madrid, Spain
| | - R Hernández-Ribas
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Department of Clinical Sciences, School of Medicine, University of Barcelona, Barcelona, Spain,Carlos III Health Institute, CIBERSAM, Madrid, Spain
| | - E Via
- Mental Health Department, Parc Taulí Sabadell, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - A de Arriba-Arnau
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain
| | - V Gálvez
- School of Psychiatry, University of New South Wales (UNSW) and Black Dog Institute, Randwick, Sydney, NSW, Australia
| | - M Urretavizcaya
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Department of Clinical Sciences, School of Medicine, University of Barcelona, Barcelona, Spain,Carlos III Health Institute, CIBERSAM, Madrid, Spain
| | - J Pujol
- Carlos III Health Institute, CIBERSAM, Madrid, Spain,MRI Research Unit, Radiology Department, Hospital del Mar, Barcelona, Spain
| | - J M Menchón
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Department of Clinical Sciences, School of Medicine, University of Barcelona, Barcelona, Spain,Carlos III Health Institute, CIBERSAM, Madrid, Spain,Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Feixa Llarga s/n, Hospitalet de Llobregat, 08907 Barcelona, Spain E-mail:
| | - N Cardoner
- Mental Health Department, Parc Taulí Sabadell, Universitat Autònoma de Barcelona, Barcelona, Spain,Mental Health Department, Parc Taulí Sabadell, Universitat Autònoma de Barcelona, Parc Taulí 1, Sabadell, 08208 Barcelona, Spain. E-mail:
| | - C Soriano-Mas
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, Barcelona, Spain,Carlos III Health Institute, CIBERSAM, Madrid, Spain,Department of Psychobiology and Methodology in Health Sciences, Universitat Autònoma de Barcelona, Barcelona, Spain
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Schaefers ATU, Teuchert-Noodt G. Developmental neuroplasticity and the origin of neurodegenerative diseases. World J Biol Psychiatry 2016; 17:587-599. [PMID: 23705632 DOI: 10.3109/15622975.2013.797104] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVES Neurodegenerative diseases like Alzheimer's and Parkinson's Disease, marked by characteristic protein aggregations, are more and more accepted to be synaptic disorders and to arise from a combination of genetic and environmental factors. In this review we propose our concept that neuroplasticity might constitute a link between early life challenges and neurodegeneration. METHODS After introducing the general principles of neuroplasticity, we show how adverse environmental stimuli during development impact adult neuroplasticity and might lead to neurodegenerative processes. RESULTS There are significant overlaps between neurodevelopmental and neurodegenerative processes. Proteins that represent hallmarks of neurodegeneration are involved in plastic processes under physiological conditions. Brain regions - particularly the hippocampus - that retain life-long plastic capacities are the key targets of neurodegeneration. Neuroplasticity is highest in young age making the brain more susceptible to external influences than later in life. Impacts during critical periods have life-long consequences on neuroplasticity and structural self-organization and are known to be common risk factors for neurodegenerative diseases. CONCLUSIONS Several lines of evidence support a link between developmental neuroplasticity and neurodegenerative processes later in life. A deeper insight into these processes is necessary to design strategies to mitigate or even prevent neurodegenerative pathologies.
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Real E, Subirà M, Alonso P, Segalàs C, Labad J, Orfila C, López-Solà C, Martínez-Zalacaín I, Via E, Cardoner N, Jiménez-Murcia S, Soriano-Mas C, Menchón JM. Brain structural correlates of obsessive-compulsive disorder with and without preceding stressful life events. World J Biol Psychiatry 2016; 17:366-77. [PMID: 26784523 DOI: 10.3109/15622975.2016.1142606] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Objectives There is growing evidence supporting a role for stressful life events (SLEs) at obsessive-compulsive disorder (OCD) onset, but neurobiological correlates of such effect are not known. We evaluated regional grey matter (GM) changes associated with the presence/absence of SLEs at OCD onset. Methods One hundred and twenty-four OCD patients and 112 healthy controls were recruited. Patients were split into two groups according to the presence (n = 56) or absence (n = 68) of SLEs at disorder's onset. A structural magnetic resonance image was acquired for each participant and pre-processed with Statistical Parametric Mapping software (SPM8) to obtain a volume-modulated GM map. Between-group differences in sociodemographic, clinical and whole-brain regional GM volumes were assessed. Results SLEs were associated with female sex, later age at disorder's onset, more contamination/cleaning and less hoarding symptoms. In comparison with controls, patients without SLEs showed GM volume increases in bilateral dorsal putamen and the central tegmental tract of the brainstem. By contrast, patients with SLEs showed specific GM volume increases in the right anterior cerebellum. Conclusions Our findings support the idea that neuroanatomical alterations of OCD patients partially depend on the presence of SLEs at disorder's onset.
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Affiliation(s)
- E Real
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain
| | - M Subirà
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain ;,c Department of Clinical Sciences, School of Medicine , University of Barcelona , Barcelona , Spain
| | - P Alonso
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain ;,c Department of Clinical Sciences, School of Medicine , University of Barcelona , Barcelona , Spain
| | - C Segalàs
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain
| | - J Labad
- d Mental Health Department , Corporació Sanitària Parc Taulí , Sabadell , Spain ;,e Department of Psychiatry and Forensic Medicine , Universitat Autònoma De Barcelona , Barcelona , Spain
| | - C Orfila
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain
| | - C López-Solà
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain ;,c Department of Clinical Sciences, School of Medicine , University of Barcelona , Barcelona , Spain
| | - I Martínez-Zalacaín
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain
| | - E Via
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,c Department of Clinical Sciences, School of Medicine , University of Barcelona , Barcelona , Spain
| | - N Cardoner
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,d Mental Health Department , Corporació Sanitària Parc Taulí , Sabadell , Spain ;,e Department of Psychiatry and Forensic Medicine , Universitat Autònoma De Barcelona , Barcelona , Spain
| | - S Jiménez-Murcia
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,f Centro de Investigación Biomédica en Red-Fisiopatología de la Obesidad y Nutrición (CIBERobn) , Carlos III Health Institute , Madrid , Spain
| | - C Soriano-Mas
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain ;,g Department of Psychobiology and Methodology in Health Sciences , Universitat Autònoma de Barcelona , Barcelona , Spain
| | - J M Menchón
- a Psychiatry Department , Bellvitge University Hospital, Bellvitge Biomedical Research Institute (IDIBELL) , Barcelona , Spain ;,b Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM) , Carlos III Health Institute , Spain ;,c Department of Clinical Sciences, School of Medicine , University of Barcelona , Barcelona , Spain
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Chou KH, Lin WC, Lee PL, Tsai NW, Huang YC, Chen HL, Cheng KY, Chen PC, Wang HC, Lin TK, Li SH, Lin WM, Lu CH, Lin CP. Structural covariance networks of striatum subdivision in patients with Parkinson's disease. Hum Brain Mapp 2014; 36:1567-84. [PMID: 25594281 DOI: 10.1002/hbm.22724] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 11/24/2014] [Accepted: 12/08/2014] [Indexed: 01/09/2023] Open
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder associated with the striatum. Previous studies indicated that subdivisions of the striatum with distinct functional connectivity profiles contribute to different pathogeneses in PD. Segregated structural covariance (SC) pattern between the striatum and neocortex observed in healthy subjects, however, remain unknown in PD. The purpose of this study is to map and compare the subregional striatal SC network organization between 30 healthy controls and 48 PD patients and to investigate their association with the disease severity. The striatal SC network was statistically inferred by correlating the mean gray matter (GM) volume of six striatal subdivisions (including the bilateral dorsal caudate, superior ventral striatum, inferior ventral striatum, dorsal caudal putamen, dorsal rostral putamen, and ventral rostral putamen) with the entire neocortical GM volume in voxel-wise manner. The PD patients revealed marked atrophy in the striatum, cerebellum, and extra-striatum neocortices. As predicted, segregated striatal SC network patterns were observed in both groups. This suggests that in PD, pathological processes occurring in the striatum affect the same striato-cortical networks that covary with the striatum in healthy brains. The PD patients further demonstrated atypical striatal SC patterns between the caudate, parahippocampus temporal cortices, and cerebellum, which corresponded to dopaminergic associated network. The areas with significant group differences in SC were further associated with disease severity. Our findings support previous studies indicating that PD is associated with altered striato-cortical networks, and suggest that structural changes in the striatum may result in a cascade of alterations in multiple neocortices.
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Affiliation(s)
- Kun-Hsien Chou
- Institute of Neuroscience, National Yang-Ming University, Taipei, Taiwan; Brain Research Center, National Yang-Ming University, Taipei, Taiwan
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Protective effects of Ginkgo biloba extract EGb 761 against noise trauma-induced hearing loss and tinnitus development. Neural Plast 2014; 2014:427298. [PMID: 25028612 PMCID: PMC4083883 DOI: 10.1155/2014/427298] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/25/2014] [Accepted: 04/29/2014] [Indexed: 01/16/2023] Open
Abstract
Noise-induced hearing loss (NIHL) and resulting comorbidities like subjective tinnitus are common diseases in modern societies. A substance shown to be effective against NIHL in an animal model is the Ginkgo biloba extract EGb 761. Further effects of the extract on the cellular and systemic levels of the nervous system make it a promising candidate not only for protection against NIHL but also for its secondary comorbidities like tinnitus. Following an earlier study we here tested the potential effectiveness of prophylactic EGb 761 treatment against NIHL and tinnitus development in the Mongolian gerbil. We monitored the effects of EGb 761 and noise trauma-induced changes on signal processing within the auditory system by means of behavioral and electrophysiological approaches. We found significantly reduced NIHL and tinnitus development upon EGb 761 application, compared to vehicle treated animals. These protective effects of EGb 761 were correlated with changes in auditory processing, both at peripheral and central levels. We propose a model with two main effects of EGb 761 on auditory processing, first, an increase of auditory brainstem activity leading to an increased thalamic input to the primary auditory cortex (AI) and second, an asymmetric effect on lateral inhibition in AI.
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Structural covariance of the neostriatum with regional gray matter volumes. Brain Struct Funct 2012; 218:697-709. [DOI: 10.1007/s00429-012-0422-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 04/24/2012] [Indexed: 10/28/2022]
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Synaptic remodeling in the dentate gyrus, CA3, CA1, subiculum, and entorhinal cortex of mice: effects of deprived rearing and voluntary running. Neural Plast 2010; 2010:870573. [PMID: 20508828 PMCID: PMC2876250 DOI: 10.1155/2010/870573] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Revised: 03/06/2010] [Accepted: 03/07/2010] [Indexed: 11/17/2022] Open
Abstract
Hippocampal cell proliferation is strongly increased and synaptic turnover decreased after rearing under social and physical deprivation in gerbils (Meriones unguiculatus). We examined if a similar epigenetic effect of rearing environment on adult neuroplastic responses can be found in mice (Mus musculus). We examined synaptic turnover rates in the dentate gyrus, CA3, CA1, subiculum, and entorhinal cortex. No direct effects of deprived rearing on rates of synaptic turnover were found in any of the studied regions. However, adult wheel running had the effect of leveling layer-specific differences in synaptic remodeling in the dentate gyrus, CA3, and CA1, but not in the entorhinal cortex and subiculum of animals of both rearing treatments. Epigenetic effects during juvenile development affected adult neural plasticity in mice, but seemed to be less pronounced than in gerbils.
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