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Nair VD, Ge Y. Alterations of miRNAs reveal a dysregulated molecular regulatory network in Parkinson's disease striatum. Neurosci Lett 2016; 629:99-104. [PMID: 27369327 DOI: 10.1016/j.neulet.2016.06.061] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 06/27/2016] [Accepted: 06/28/2016] [Indexed: 12/12/2022]
Abstract
Molecular adaptations in the striatum mediated by dopamine (DA) denervation and/or levodopa (L-dopa) treatments have been implicated in the motor deficits found in Parkinson's disease (PD). Alterations in inflammatory response mechanisms and glutamatergic neurotransmission are reported to play important roles in mediating these changes. However, the mechanisms mediating the molecular adaptations in the striatum are not well understood. Small non-coding microRNAs (miRNAs) influence numerous biological processes including the development and maintenance of striatal neurons by regulating gene expression post-transcriptionally. To investigate miRNA function in human PD striatum, we examined the global expression of miRNAs in postmortem putamen (putamen along with caudate forms the striatum) tissues obtained from PD patients and neurologically normal controls using Nanostring miRNA assays. We found that 6 miRNAs were significantly (p≤0.05) upregulated and 7 miRNAs were downregulated in PD putamen when compared with control. The differential expression (DE) of the 4 highest scoring miRNAs was further confirmed by reverse transcription polymerase chain reaction. Ingenuity pathway analysis demonstrated that these miRNAs are enriched in the processes of inflammatory responses. We found that the expression of DE miRNAs in PD putamen negatively correlates with the expression of gene transcripts implicated in inflammatory response with p53 and NF-kB as central signaling molecules. Taken together, our results suggest that in PD striatum, the DE miRNAs are associated with the oxidative stress pathway. This mechanism may contribute to the molecular adaptations and related motor complications found in PD.
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Affiliation(s)
- Venugopalan D Nair
- Department of Neurology and Center for Translational Systems Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Yongchao Ge
- Department of Neurology and Center for Translational Systems Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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Takeuchi R, Tada M, Shiga A, Toyoshima Y, Konno T, Sato T, Nozaki H, Kato T, Horie M, Shimizu H, Takebayashi H, Onodera O, Nishizawa M, Kakita A, Takahashi H. Heterogeneity of cerebral TDP-43 pathology in sporadic amyotrophic lateral sclerosis: Evidence for clinico-pathologic subtypes. Acta Neuropathol Commun 2016; 4:61. [PMID: 27338935 PMCID: PMC4918136 DOI: 10.1186/s40478-016-0335-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 06/11/2016] [Indexed: 12/11/2022] Open
Abstract
Frontotemporal lobar degeneration (FTLD) and amyotrophic lateral sclerosis (ALS) are types of major TDP-43 (43-kDa TAR DNA-binding protein) proteinopathy. Cortical TDP-43 pathology has been analyzed in detail in cases of FTLD-TDP, but is still unclear in cases of ALS. We attempted to clarify the cortical and subcortical TDP-43 pathology in Japanese cases of sporadic ALS (n = 96) using an antibody specific to phosphorylated TDP-43 (pTDP-43). The cases were divided into two groups: those without pTDP-43-positive neuronal cytoplasmic inclusions in the hippocampal dentate granule cells (Type 1, n = 63), and those with such inclusions (Type 2, n = 33). Furthermore, the Type 2 cases were divided into two subgroups based on semi-quantitative estimation of pTDP-43-positive dystrophic neurites (DNs) in the temporal neocortex: Type 2a (accompanied by no or few DNs, n = 22) and Type 2b (accompanied by abundant DNs, n = 11). Clinico-pathologic analysis revealed that cognitive impairment was a feature in patients with Type 2a and Type 2b, but not in those with Type 1, and that importantly, Type 2b is a distinct subtype characterized by a poor prognosis despite the less severe loss of lower motor neurons, the unusual subcortical dendrospinal pTDP-43 pathology, and more prominent glial involvement in cortical pTDP-43 pathology than other two groups. Considering the patient survival time and severity of motor neuron loss in each group, transition from Type 1 to Type 2, or from Type 2a to Type 2b during the disease course appeared unlikely. Therefore, each of these three groups was regarded as an independent subtype.
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103
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Lu Y, Liang H, Han D, Mo Y, Li Z, Cheng Y, Xu X, Shen Z, Tan C, Zhao W, Zhu Y, Sun X. The volumetric and shape changes of the putamen and thalamus in first episode, untreated major depressive disorder. Neuroimage Clin 2016; 11:658-666. [PMID: 27222797 PMCID: PMC4873692 DOI: 10.1016/j.nicl.2016.04.008] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/26/2016] [Accepted: 04/13/2016] [Indexed: 12/23/2022]
Abstract
Previous MRI studies confirmed abnormalities in the limbic-cortical-striatal-pallidal-thalamic (LCSPT) network or limbic-cortico-striatal-thalamic-cortical (LCSTC) circuits in patients with major depressive disorder (MDD), but few studies have investigated the subcortical structural abnormalities. Therefore, we sought to determine whether focal subcortical grey matter (GM) changes might be present in MDD at an early stage. We recruited 30 first episode, untreated patients with major depressive disorder (MDD) and 26 healthy control subjects. Voxel-based morphometry was used to evaluate cortical grey matter changes, and automated volumetric and shape analyses were used to assess volume and shape changes of the subcortical GM structures, respectively. In addition, probabilistic tractography methods were used to demonstrate the relationship between the subcortical and the cortical GM. Compared to healthy controls, MDD patients had significant volume reductions in the bilateral putamen and left thalamus (FWE-corrected, p < 0.05). Meanwhile, the vertex-based shape analysis showed regionally contracted areas on the dorsolateral and ventromedial aspects of the bilateral putamen, and on the dorsal and ventral aspects of left thalamus in MDD patients (FWE-corrected, p < 0.05). Additionally, a negative correlation was found between local atrophy in the dorsal aspects of the left thalamus and clinical variables representing severity. Furthermore, probabilistic tractography demonstrated that the area of shape deformation of the bilateral putamen and left thalamus have connections with the frontal and temporal lobes, which were found to be related to major depression. Our results suggested that structural abnormalities in the putamen and thalamus might be present in the early stages of MDD, which support the role of subcortical structure in the pathophysiology of MDD. Meanwhile, the present study showed that these subcortical structural abnormalities might be the potential trait markers of MDD. Structural abnormalities in putamen and thalamus might be the potential trait marker of MDD at the early stage. The abnormality of LCSTC circuits, or LCSPT circuit, may contribute to the pathophysiology of MDD. The shape analysis is more sensitive to subtle structural changes than volumetric and VBM analysis.
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Affiliation(s)
- Yi Lu
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Hongmin Liang
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Dan Han
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yin Mo
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Zongfang Li
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yuqi Cheng
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Xiufeng Xu
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Zonglin Shen
- Department of Psychiatry, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Chunyan Tan
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Wei Zhao
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Yun Zhu
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China
| | - Xuejin Sun
- Department of Medical Imaging, The First Affiliated Hospital, Kunming Medical University, Kunming, Yunnan, China.
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104
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Cui LB, Liu K, Li C, Wang LX, Guo F, Tian P, Wu YJ, Guo L, Liu WM, Xi YB, Wang HN, Yin H. Putamen-related regional and network functional deficits in first-episode schizophrenia with auditory verbal hallucinations. Schizophr Res 2016; 173:13-22. [PMID: 26995674 DOI: 10.1016/j.schres.2016.02.039] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 11/27/2015] [Accepted: 02/29/2016] [Indexed: 10/22/2022]
Abstract
OBJECTIVE Auditory verbal hallucinations (AVHs) are one of the cardinal symptoms of schizophrenia (SZ). Cerebral dysfunction may represent pathophysiological underpinnings behind AVHs in SZ. However, regional and network functional deficits for AVHs in SZ remain to be identified. METHODS Seventeen medication-naïve first-episode SZ patients with AVHs, 15 without AVHs, and 19 healthy controls (HCs) were studied using resting-state functional magnetic resonance imaging. We compared the amplitude of low-frequency fluctuation (ALFF) and regional homogeneity (ReHo) among these subjects. Areas with both ALFF and ReHo alterations were used as seeds in functional connectivity (FC) analysis. Then we performed correlation analysis between image measures and symptoms and receiver operating characteristic analysis. RESULTS One-way analysis of variance showed significant differences of ALFF and ReHo in the bilateral putamen, thereby being used as seeds. SZ patients with AVHs showed decreased ALFF in the left putamen, increased ReHo in the right dorsolateral prefrontal cortex (DLPFC), and increased right putamen-seeded FC with the left DLPFC and Broca's area relative to those without AVHs. Furthermore, the increased strength of the connectivity between the right putamen and left Broca's area correlated with the severity of SZ symptoms. Both patient groups demonstrated hypoconnectivity within frontal/parietal/temporal cortico-striatal-cerebellar networks compared with HCs. CONCLUSION AVHs in SZ may be caused by abnormal regional function in the putamen and prefrontal cortex, as well as hyperconnectivity between them. The putamen-related regional and network functional deficits may reflect imbalance in neuromodulation of AVHs in SZ. Furthermore, dysconnectivity within cortico-striatal-cerebellar networks might subserve the pathogenesis of SZ.
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Affiliation(s)
- Long-Biao Cui
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Kang Liu
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Chen Li
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Liu-Xian Wang
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Fan Guo
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Ping Tian
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yu-Jing Wu
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Li Guo
- Department of Psychiatry, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Wen-Ming Liu
- Department of Psychiatry, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yi-Bin Xi
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Hua-Ning Wang
- Department of Psychiatry, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
| | - Hong Yin
- Department of Radiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, China.
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105
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Kubota Y, Sato W, Kochiyama T, Uono S, Yoshimura S, Sawada R, Sakihama M, Toichi M. Putamen volume correlates with obsessive compulsive characteristics in healthy population. Psychiatry Res Neuroimaging 2016; 249:97-104. [PMID: 26849956 DOI: 10.1016/j.pscychresns.2016.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 01/09/2016] [Accepted: 01/14/2016] [Indexed: 12/16/2022]
Abstract
Obsessions and compulsions (OCs) are frequent in healthy subjects; however neural backgrounds of the subclinical OCs were largely unknown. Results from recent studies suggested involvement of the putamen in the OC traits. To investigate this issue, 49 healthy subjects were assessed using structural magnetic resonance imaging (MRI) and the Maudsley Obsessive Compulsive Inventory (MOCI). Anatomical delineation on MRI yielded the global volume and local shape of the putamen. Other striatal structures (the caudate nucleus and globus pallidus) were also examined for exploratory purpose. The relationship between volume/shape of each structures and MOCI measure was analyzed, with sex, age, state anxiety, trait anxiety, and full-scale Intelligence Quotient regressed out. The volume analysis revealed a positive relationship between the MOCI total score and the bilateral putamen volumes. The shape analysis demonstrated associations between the higher MOCI total score and hypertrophy of the anterior putamen in both hemispheres. The present study firstly revealed that the volume changes of the putamen correlated with the manifestation of subclinical OC traits. The dysfunctional cortico-anterior striatum networks seemed to be one of the neuronal subsystems underlying the subclinical OC traits.
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Affiliation(s)
- Yasutaka Kubota
- Health and Medical Services Center, Shiga University, Shiga, Japan.
| | - Wataru Sato
- The Organization for Promoting Developmental Disorder Research, Kyoto, Japan; The Hakubi Project, Primate Research Institute, Kyoto University, Aichi, Japan
| | - Takanori Kochiyama
- The Hakubi Project, Primate Research Institute, Kyoto University, Aichi, Japan
| | - Shota Uono
- Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Sayaka Yoshimura
- Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Reiko Sawada
- The Hakubi Project, Primate Research Institute, Kyoto University, Aichi, Japan
| | | | - Motomi Toichi
- The Organization for Promoting Developmental Disorder Research, Kyoto, Japan; Faculty of Human Health Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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106
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Park J, Joo JJ, Ahn BJ, Kwon KY. Serial MRI findings in a case of the Parkinson variant of multiple system atrophy: Clinical usefulness of diffusion-weighted imaging at B1000 in early stages of the disease. J Neurol Sci 2016; 362:136-8. [PMID: 26944134 DOI: 10.1016/j.jns.2016.01.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 12/17/2015] [Accepted: 01/12/2016] [Indexed: 11/19/2022]
Affiliation(s)
- Jisang Park
- Department of Radiology, Soonchunhyang University Gumi Hospital, Soonchunhyang University School of Medicine, Republic of Korea
| | - Jae Jeong Joo
- Department of Neurology, Soonchunhyang University Gumi Hospital, Soonchunhyang University School of Medicine, Republic of Korea
| | - Byoung June Ahn
- Department of Neurology, Soonchunhyang University Gumi Hospital, Soonchunhyang University School of Medicine, Republic of Korea
| | - Kyum-Yil Kwon
- Department of Neurology, Soonchunhyang University Gumi Hospital, Soonchunhyang University School of Medicine, Republic of Korea.
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107
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Hilbert K, Pine DS, Muehlhan M, Lueken U, Steudte-Schmiedgen S, Beesdo-Baum K. Gray and white matter volume abnormalities in generalized anxiety disorder by categorical and dimensional characterization. Psychiatry Res 2015; 234:314-20. [PMID: 26490569 PMCID: PMC5103633 DOI: 10.1016/j.pscychresns.2015.10.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 09/24/2015] [Accepted: 10/08/2015] [Indexed: 12/26/2022]
Abstract
Increasing efforts have been made to investigate the underlying pathophysiology of generalized anxiety disorder (GAD), but only limited consistent information is available on gray (GM) and white matter (WM) volume changes in affected adults. Additionally, few studies employed dimensional approaches to GAD pathology. This study compares structural brain imaging data from n=19 GAD subjects and n=24 healthy comparison (HC) subjects, all medication-free and matched on age, sex and education. Separate categorical and dimensional models were employed using voxel-based morphometry for GM and WM. Significantly higher GM volumes were found in GAD subjects mainly in basal ganglia structures and less consistently in the superior temporal pole. For WM, GAD subjects showed significantly lower volumes in the dlPFC. Largely consistent findings in dimensional and categorical models point toward these structural alterations being reliable and of importance for GAD. While lower volume in the dlPFC could reflect impaired emotional processing and control over worry in GAD, basal ganglia alterations may be linked to disturbed gain and loss anticipation as implicated in previous functional GAD studies. As perturbations in anticipation processes are central to GAD, these areas may warrant greater attention in future studies.
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Affiliation(s)
- Kevin Hilbert
- Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany; Neuroimaging Center, Technische Universität Dresden, Dresden, Germany; Behavioral Epidemiology, Technische Universität Dresden, Dresden, Germany.
| | - Daniel S Pine
- Mood and Anxiety Disorders Program, National Institute of Mental Health (NIMH), Bethesda, MD, USA
| | - Markus Muehlhan
- Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany; Neuroimaging Center, Technische Universität Dresden, Dresden, Germany
| | - Ulrike Lueken
- Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany; Neuroimaging Center, Technische Universität Dresden, Dresden, Germany; Department of Psychiatry, Psychosomatics, and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | | | - Katja Beesdo-Baum
- Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany; Neuroimaging Center, Technische Universität Dresden, Dresden, Germany; Behavioral Epidemiology, Technische Universität Dresden, Dresden, Germany
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108
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Sapara A, ffytche DH, Cooke MA, Williams SC, Kumari V. Is it me? Verbal self-monitoring neural network and clinical insight in schizophrenia. Psychiatry Res 2015; 234:328-35. [PMID: 26549744 PMCID: PMC4834462 DOI: 10.1016/j.pscychresns.2015.10.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 01/12/2023]
Abstract
Self-monitoring, defined as the ability to distinguish between self-generated stimuli from other-generated ones, is known to be impaired in schizophrenia. This impairment has been theorised as the basis for many of the core psychotic symptoms, in particular, poor clinical insight. This study aimed to investigate verbal self-monitoring related neural substrates of preserved and poor clinical insight in schizophrenia. It involved 40 stable schizophrenia outpatients, 20 with preserved and 20 with poor insight, and 20 healthy participants. All participants underwent functional magnetic resonance imaging with brain coverage covering key areas in the self-monitoring network during a verbal self-monitoring task. Healthy participants showed higher performance accuracy and greater thalamic activity than both preserved and poor insight patient groups. Preserved insight patients showed higher activity in the putamen extending into the caudate, insula and inferior frontal gyrus, compared to poor insight patients, and in the anterior cingulate and medial frontal gyrus, compared to healthy participants. Poor insight patients did not show greater activity in any brain area compared to preserved insight patients or healthy participants. Future studies may pursue therapeutic avenues, such as meta-cognitive therapies to promote self-monitoring or targeted stimulation of relevant brain areas, as means of enhancing insight in schizophrenia.
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Affiliation(s)
- Adegboyega Sapara
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Dominic H. ffytche
- Department of Old Age Psychiatry and Department of Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Michael A. Cooke
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Steven C.R. Williams
- Department of Neuroimaging Sciences, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
| | - Veena Kumari
- Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, UK; NIHR Biomedical Research Centre for Mental Health, South London and Maudsley NHS Foundation Trust, London, UK.
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109
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Hong SB, Lee TY, Kwak YB, Kim SN, Kwon JS. Baseline putamen volume as a predictor of positive symptom reduction in patients at clinical high risk for psychosis: A preliminary study. Schizophr Res 2015; 169:178-185. [PMID: 26527246 DOI: 10.1016/j.schres.2015.10.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 10/13/2015] [Accepted: 10/20/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVES Illness course in individuals at clinical high risk (CHR) status for psychosis is heterogeneous, which limits effective treatment for all CHR subgroups. Baseline predictors of positive symptom trajectory in the CHR group will reduce such limitations. We singled out the putamen, thought to be involved in the generation of the key schizophrenia symptoms early in the course of disease, as a potential predictor of positive symptom trajectory in CHR patients. METHOD We recruited 45 CHR patients and 29 age- and gender-matched healthy controls (HC). The CHR group was divided into patients with positive symptom reduction (CHR-R) and patients without positive symptom reduction (CHR-NR) at 6 months. Comparisons were made between the baseline putamen volumes of CHR-R, CHR-NR and HC groups. The relationship between baseline putamen volumes and clinical measures was investigated. RESULTS Left putamen volumes of CHR-R patients were significantly smaller than those of HCs (p=0.002) and of CHR-NR patients (p=0.024). CHR-R patients had significantly reduced leftward laterality compared to HCs (p=0.007). In the CHR-R group, bilateral putamen volumes were correlated with positive symptom severity at baseline (r=-0.552, p=0.001) and at 6 months (r=-0.360, p=0.043), and predicted positive symptom score change in 6 months at a trend level (p=0.092). CONCLUSION Smaller left putamen volumes in CHR-R patients, and the correlation between positive symptom severity and putamen volumes suggest that putamen volume is a possible risk-stratifier and predictor of clinical course in the CHR population.
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Affiliation(s)
- Sang Bin Hong
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Tae Young Lee
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea; Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea.
| | - Yoo Bin Kwak
- Department of Brain & Cognitive Sciences, Seoul National University College of National Sciences, Seoul, Republic of Korea
| | - Sung Nyun Kim
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jun Soo Kwon
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea; Medical Research Center, Seoul National University College of Medicine, Seoul, Republic of Korea; Department of Brain & Cognitive Sciences, Seoul National University College of National Sciences, Seoul, Republic of Korea
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110
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Emsley R, Asmal L, du Plessis S, Chiliza B, Kidd M, Carr J, Vink M. Dorsal striatal volumes in never-treated patients with first-episode schizophrenia before and during acute treatment. Schizophr Res 2015; 169:89-94. [PMID: 26441006 DOI: 10.1016/j.schres.2015.09.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 09/06/2015] [Accepted: 09/08/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND Studies of pre-and post-treatment striatal volume in schizophrenia have reported conflicting results. MATERIALS AND METHODS We assessed dorsal striatal (caudate and putamen) volumes bilaterally in 22 never-treated, non-substance-abusing patients with first-episode schizophrenia or schizophreniform disorder and 23 healthy controls matched for age, sex and educational status. Patients received either risperidone or flupenthixol long acting injection and were compared by structural MRI with controls at weeks 0, 4 and 13. T1-weighted data on a 3T MRI scanner were obtained and images were reconstructed using FreeSurfer. Treatment outcome was assessed by changes in psychopathology, insight, functionality, cognitive performance and motor symptoms. RESULTS Caudate, but not putamen volumes was significantly larger in patients bilaterally at baseline (P=0.01). Linear mixed effects repeated measures found no significant group × time interactions for any of the regions. Caudate volume was not significantly associated with improvements in psychotic symptoms. Also, the findings of a regression model were inconsistent insofar as larger caudate volume was associated with less improvement in depression scores, greater improvement in functionality and greater improvement in verbal learning but less improvement in reasoning and problem solving (left caudate) and composite cognitive score (right caudate). CONCLUSIONS The increased caudate volumes prior to treatment are contrary to previous reports in never-treated patients with first-episode schizophrenia, and together with our failure to demonstrate volume changes related to acute treatment, call into question previous proposals that enlarged caudate volume is a consequence of antipsychotic treatment.
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Affiliation(s)
- Robin Emsley
- Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa.
| | - Laila Asmal
- Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Stéfan du Plessis
- Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Bonginkosi Chiliza
- Department of Psychiatry, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Martin Kidd
- Centre for Statistical Consultation, Stellenbosch University, South Africa
| | - Jonathan Carr
- Division of Neurology, Faculty of Medicine and Health Sciences, Stellenbosch University, South Africa
| | - Matthijs Vink
- Department of Psychiatry, University Medical Centre Utrecht, The Netherlands
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111
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Simioni AC, Dagher A, Fellows LK. Compensatory striatal-cerebellar connectivity in mild-moderate Parkinson's disease. Neuroimage Clin 2015; 10:54-62. [PMID: 26702396 PMCID: PMC4669533 DOI: 10.1016/j.nicl.2015.11.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 11/05/2015] [Accepted: 11/10/2015] [Indexed: 11/29/2022]
Abstract
Dopamine depletion in the putamen is associated with altered motor network functional connectivity in people with Parkinson's disease (PD), but the functional significance of these changes remains unclear, attributed to either pathological or compensatory mechanisms in different studies. Here, we examined the effects of PD on dorsal caudal putamen functional connectivity, off and on dopamine replacement therapy (DRT), using resting state fMRI. Motor performance was assessed with the Purdue pegboard task. Twenty-one patients with mild–moderate Parkinson's disease were studied twice, once after an overnight DRT washout and once after the administration of a standard dose of levodopa (Sinemet), and compared to 20 demographically-matched healthy control participants. PD patients off DRT showed increased putamen functional connectivity with both the cerebellum (lobule V) and primary motor cortex (M1), relative to healthy controls. Greater putamen–cerebellar functional connectivity was significantly correlated with better motor performance, whereas greater putamen–M1 functional connectivity was predictive of poorer motor performance. The administration of levodopa improved motor performance in the PD group, as expected, and reduced putamen–cerebellar connectivity to levels comparable to the healthy control group. The strength of putamen–cerebellar functional connectivity continued to predict motor performance in the PD group while on levodopa. These findings argue that increased putamen–M1 functional connectivity reflects a pathological change, deleterious to motor performance. In contrast, increased putamen–cerebellar connectivity reflects a compensatory mechanism. We examined the functional significance of altered motor networks in Parkinson's. Patients showed greater putamen–cerebellar and –motor cortex connectivity. Greater putamen–cerebellar connectivity correlated with better motor performance. Greater putamen–motor cortex connectivity correlated with worse motor performance. l-Dopa normalized putamen–cerebellar connectivity and improved motor performance.
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Affiliation(s)
- Alison C Simioni
- Montreal Neurological Institute, McGill University, 3801 University Street, Rm 276, Montreal, QC H3A 2B4, Canada
| | - Alain Dagher
- Montreal Neurological Institute, McGill University, 3801 University Street, Rm 276, Montreal, QC H3A 2B4, Canada
| | - Lesley K Fellows
- Montreal Neurological Institute, McGill University, 3801 University Street, Rm 276, Montreal, QC H3A 2B4, Canada
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112
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Luz M, Mohr E, Fibiger HC. GDNF-induced cerebellar toxicity: A brief review. Neurotoxicology 2016; 52:46-56. [PMID: 26535469 DOI: 10.1016/j.neuro.2015.10.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/22/2015] [Accepted: 10/24/2015] [Indexed: 12/19/2022]
Abstract
Recombinant-methionyl human glial cell line-derived neurotrophic factor (GDNF) is known for its neurorestorative and neuroprotective effects in rodent and primate models of Parkinson's disease (PD). When administered locally into the putamen of Parkinsonian subjects, early clinical studies showed its potential promise as a disease-modifying agent. However, the development of GDNF for the treatment of PD has been significantly clouded by findings of cerebellar toxicity after continuous intraputamenal high-dose administration in a 6-month treatment/3-month recovery toxicology study in rhesus monkeys. Specifically, multifocal cerebellar Purkinje cell loss affecting 1-21% of the cerebellar cortex was observed in 4 of 15 (26.7%; 95% confidence interval [CI]: 10.5-52.4%) animals treated at the highest dose level tested (3000μg/month). No cerebellar toxicity was observed at lower doses (450 and 900μg/month) in the same study, or at similar or higher doses (up to 10,000μg/month) in subchronic or chronic toxicology studies testing intermittent intracerebroventricular administration. While seemingly associated with the use of GDNF, the pathogenesis of the cerebellar lesions has not been fully understood to date. This review integrates available information to evaluate potential pathogenic mechanisms and provide a consolidated assessment of the findings. While other explanations are considered, the existing evidence is most consistent with the hypothesis that leakage of GDNF into cerebrospinal fluid during chronic infusions into the putamen down-regulates GDNF receptors on Purkinje cells, and that subsequent acute withdrawal of GDNF generates the observed lesions. The implications of these findings for clinical studies with GDNF are discussed.
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113
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Abstract
Prior research has suggested benefits of aerobic physical activity (PA) on cognition and brain volumes in HIV uninfected (HIV-) individuals, however, few studies have explored the relationships between PA and brain integrity (cognition and structural brain volumes) in HIV-infected (HIV+) individuals. Seventy HIV+ individuals underwent neuropsychological testing, structural neuroimaging, laboratory tests, and completed a PA questionnaire, recalling participation in walking, running, and jogging activities over the last year. A PA engagement score of weekly metabolic equivalent (MET) hr of activity was calculated using a compendium of PAs. HIV+ individuals were classified as physically active (any energy expended above resting expenditure, n=22) or sedentary (n=48). Comparisons of neuropsychological performance, grouped by executive and motor domains, and brain volumes were completed between groups. Physically active and sedentary HIV+ individuals had similar demographic and laboratory values, but the active group had higher education (14.0 vs. 12.6 years, p=.034). Physically active HIV+ individuals performed better on executive (p=.040, unadjusted; p=.043, adjusted) but not motor function (p=.17). In addition, among the physically active group the amount of physical activity (METs) positively correlated with executive (Pearson's r=0.45, p=0.035) but not motor (r=0.21; p=.35) performance. In adjusted analyses the physically active HIV+ individuals had larger putamen volumes (p=.019). A positive relationship exists between PA and brain integrity in HIV+ individuals. Results from the present study emphasize the importance to conduct longitudinal interventional investigation to determine if PA improves brain integrity in HIV+ individuals.
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Mizuno K, Takiguchi S, Yamazaki M, Asano M, Kato S, Kuriyama K, Watanabe Y, Sadato N, Tomoda A. Impaired neural reward processing in children and adolescents with reactive attachment disorder: A pilot study. Asian J Psychiatr 2015; 17:89-93. [PMID: 26310381 DOI: 10.1016/j.ajp.2015.08.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 08/08/2015] [Indexed: 11/17/2022]
Abstract
Reactive attachment disorder (RAD) is characterized by markedly disturbed and developmentally inappropriate social relatedness due to parental maltreatment. RAD patients often display a high number of comorbid attention deficit/hyperactivity disorder (ADHD) symptoms, and certain RAD symptoms are difficult to discriminate from ADHD. One of the core characteristics of ADHD is a decrease in neural reward processing due to dopamine dysfunction. The aim of the present study was to determine whether the brain activity involved in reward processing in RAD patients is impaired in comparison with ADHD patients and typically developed controls. Five RAD patients, 17 typically developed (TD) controls and 17 ADHD patients aged 10-16 years performed tasks with high and low monetary reward while undergoing functional magnetic resonance imaging. ADHD patients were tested before and after 3 months treatment with osmotic release oral system-methylphenidate. Before treatment, ADHD patients showed that striatal and thalamus activities only in the tasks with low monetary reward were lower than TD controls. RAD patients showed decrease in activity of the caudate, putamen and thalamus during both the high and low monetary reward conditions in comparison with all the other groups. In RAD patients, the activity of the putamen was associated with the severity of posttraumatic stress and overt dissociation. Reward sensitivity was markedly decreased in children and adolescents with RAD, as evidenced by a diminished neural response during reward perception. This suggests that dopaminergic dysfunction exists in these patients, and may inform future dopaminergic treatment strategies for RAD.
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Affiliation(s)
- Kei Mizuno
- Pathophysiological and Health Science Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Hyogo, Japan; Department of Medical Science on Fatigue, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City 545-8585, Osaka, Japan.
| | - Shinichiro Takiguchi
- Research Center for Child Mental Development, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho 910-1193, Fukui, Japan.
| | - Mika Yamazaki
- Research Center for Child Mental Development, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho 910-1193, Fukui, Japan.
| | - Mizuki Asano
- Research Center for Child Mental Development, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho 910-1193, Fukui, Japan.
| | - Shiho Kato
- Department of Child Psychiatry, Aichi Children's Health and Medical Center, 1-2 Osakada, Moriokacho, Obu 474-8710, Aichi, Japan.
| | - Kikuko Kuriyama
- Department of Child Psychiatry, Aichi Children's Health and Medical Center, 1-2 Osakada, Moriokacho, Obu 474-8710, Aichi, Japan.
| | - Yasuyoshi Watanabe
- Pathophysiological and Health Science Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Hyogo, Japan; Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka City 545-8585, Osaka, Japan.
| | - Norihiro Sadato
- Division of Cerebral Integration, Department of Cerebral Research, National Institute for Physiological Sciences, 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Aichi, Japan.
| | - Akemi Tomoda
- Research Center for Child Mental Development, University of Fukui, 23-3 Matsuoka-Shimoaizuki, Eiheiji-cho 910-1193, Fukui, Japan.
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115
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du Plessis S, Vink M, Joska JA, Koutsilieri E, Bagadia A, Stein DJ, Emsley R. HIV Infection Is Associated with Impaired Striatal Function during Inhibition with Normal Cortical Functioning on Functional MRI. J Int Neuropsychol Soc 2015; 21:722-31. [PMID: 26435417 DOI: 10.1017/S1355617715000971] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The aim of the present study was to investigate the effect of HIV infection on cortical and subcortical regions of the frontal-striatal system involved in the inhibition of voluntary movement. Functional MRI (fMRI) studies suggest that human immunodeficiency virus (HIV) infection is associated with frontostriatal dysfunction. While frontostriatal systems play a key role in behavioral inhibition, there are to our knowledge no fMRI studies investigating the potential impact of HIV on systems involved during the inhibition of voluntary movement. A total of 17 combined antiretroviral therapy (cART) naïve HIV+ participants as well as 18 age, gender, ethnic, education matched healthy controls performed a modified version of the stop-signal paradigm. This paradigm assessed behavior as well as functional brain activity associated with motor execution, reactive inhibition (outright stopping) and proactive inhibition (anticipatory response slowing before stopping). HIV+ participants showed significantly slower responses during motor execution compared to healthy controls, whereas they had normal proactive response slowing. Putamen hypoactivation was evident in the HIV+ participants based on successful stopping, indicating subcortical dysfunction during reactive inhibition. HIV+ participants showed normal cortical functioning during proactive inhibition. Our data provide evidence that HIV infection is associated with subcortical dysfunction during reactive inhibition, accompanied by relatively normal higher cortical functioning during proactive inhibition. This suggests that HIV infection may primarily involve basic striatal-mediated control processes in cART naïve participants.
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Schneider JS, Cambi F, Gollomp SM, Kuwabara H, Brašić JR, Leiby B, Sendek S, Wong DF. GM1 ganglioside in Parkinson's disease: Pilot study of effects on dopamine transporter binding. J Neurol Sci 2015; 356:118-23. [PMID: 26099170 PMCID: PMC4545312 DOI: 10.1016/j.jns.2015.06.028] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2015] [Revised: 05/26/2015] [Accepted: 06/14/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE GM1 ganglioside has been suggested as a treatment for Parkinson's disease (PD), potentially having symptomatic and disease modifying effects. The current pilot imaging study was performed to examine effects of GM1 on dopamine transporter binding, as a surrogate measure of disease progression, studied longitudinally. METHODS Positron emission tomography (PET) imaging data were obtained from a subset of subjects enrolled in a delayed start clinical trial of GM1 in PD [1]: 15 Early-start (ES) subjects, 14 Delayed-start (DS) subjects, and 11 Comparison (standard-of-care) subjects. Treatment subjects were studied over a 2.5 year period while Comparison subjects were studied over 2 years. Dynamic PET scans were performed over 90 min following injection of [(11)C]methylphenidate. Regional values of binding potential (BPND) were analyzed for several striatal volumes of interest. RESULTS Clinical results for this subset of subjects were similar to those previously reported for the larger study group. ES subjects showed early symptomatic improvement and slow symptom progression over the study period. DS and Comparison subjects were initially on the same symptom progression trajectory but diverged once DS subjects received GM1 treatment. Imaging results showed significant slowing of BPND loss in several striatal regions in GM1-treated subjects and in some cases, an increased BPND in some striatal regions was detected after GM1 use. INTERPRETATION Results of this pilot imaging study provide additional data to suggest a potential disease modifying effect of GM1 on PD. These results need to be confirmed in a larger number of subjects.
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Affiliation(s)
- Jay S Schneider
- Department of Pathology, Anatomy and Cell Biology and Parkinson's Disease Research Unit, Thomas Jefferson University, Philadelphia, PA 19107, United States.
| | - Franca Cambi
- Dept. of Neurology, University of Pittsburgh School of Medicine and Pittsburgh VAMC, Pittsburgh, PA 15213, United States
| | - Stephen M Gollomp
- Division of Neurology, Lankenau Medical Center, Wynnewood, PA 19096, United States
| | - Hiroto Kuwabara
- Division of Nuclear Medicine, Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins School of Medicine, Baltimore, MD 21287, United States
| | - James R Brašić
- Division of Nuclear Medicine, Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins School of Medicine, Baltimore, MD 21287, United States
| | - Benjamin Leiby
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA 19107, United States
| | - Stephanie Sendek
- Department of Pathology, Anatomy and Cell Biology and Parkinson's Disease Research Unit, Thomas Jefferson University, Philadelphia, PA 19107, United States
| | - Dean F Wong
- Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States; Department of Psychiatry and Behavior Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States; Solomon Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
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117
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Fuentes D, Rzezak P, Pereira FR, Malloy-Diniz LF, Santos LC, Duran FLS, Barreiros MA, Castro CC, Busatto GF, Tavares H, Gorenstein C. Mapping brain volumetric abnormalities in never-treated pathological gamblers. Psychiatry Res 2015; 232:208-13. [PMID: 25952288 DOI: 10.1016/j.pscychresns.2015.04.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 03/17/2015] [Accepted: 04/02/2015] [Indexed: 01/17/2023]
Abstract
Several magnetic resonance imaging (MRI) studies to date have investigated brain abnormalities in association with the diagnosis of pathological gambling (PG), but very few of these have specifically searched for brain volume differences between PG patients and healthy volunteers (HV). To investigate brain volume differences between PG patients and HV, 30 male never-treated PG patients (DSM-IV-TR criteria) and 30 closely matched HV without history of psychiatric disorders in the past 2 years underwent structural magnetic resonance imaging with a 1.5-T instrument. Using Freesurfer software, we performed an exploratory whole-brain voxelwise volume comparison between the PG group and the HV group, with false-discovery rate correction for multiple comparisons (p < 0.05). Using a more flexible statistical threshold (p < 0.01, uncorrected for multiple comparisons), we also measured absolute and regional volumes of several brain structures separately. The voxelwise analysis showed no clusters of significant regional differences between the PG and HV groups. The additional analyses of absolute and regional brain volumes showed increased absolute global gray matter volumes in PG patients relative to the HV group, as well as relatively decreased volumes specifically in the left putamen, right thalamus and right hippocampus (corrected for total gray matter). Our findings indicate that structural brain abnormalities may contribute to the functional changes associated with the symptoms of PG, and they highlight the relevance of the brain reward system to the pathophysiology of this disorder.
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Affiliation(s)
- Daniel Fuentes
- Psychology & Neuropsychology Unit, Institute of Psychiatry, Clinical Hospital, Medical School, University of São Paulo (IPq-HCFMUSP), Integrated Laboratories of Neuropsychology (LINEU), São Paulo, Brazil
| | - Patricia Rzezak
- Department of Psychiatry, HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil
| | - Fabricio R Pereira
- Department of Psychiatry, HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil
| | - Leandro F Malloy-Diniz
- Department of Mental Health, School of Medicine, Federal University of Minas Gerais-UFMG, LINEU, Brazil
| | - Luciana C Santos
- Department of Psychiatry, HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil
| | - Fábio L S Duran
- Department of Psychiatry, HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil
| | | | | | - Geraldo F Busatto
- Department of Psychiatry, HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil.
| | | | - Clarice Gorenstein
- Department of Pharmacology, Institute of Biomedical Sciences USP, Laboratory of Psychopharmacology-LIM-23, IPq-HCFMUSP, Brazil; Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), University of São Paulo, São Paulo, Brazil
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118
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Moffett K, Crosson B, Spence JS, Case K, Levy I, Gopinath K, Shah P, Goyal A, Fang Y, Briggs RW, Hart J, Moore A, Haley RW. Word-finding impairment in veterans of the 1991 Persian Gulf War. Brain Cogn 2015; 98:65-73. [PMID: 26114921 DOI: 10.1016/j.bandc.2015.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2014] [Revised: 04/15/2015] [Accepted: 05/27/2015] [Indexed: 11/25/2022]
Abstract
Approximately one quarter of 1991 Persian Gulf War Veterans experience cognitive and physiological sequelae that continue to be unexplained by known medical or psychological conditions. Difficulty coming up with words and names, familiar before the war, is a hallmark of the illness. Three Gulf War Syndrome subtypes have been identified and linked to specific war-time chemical exposures. The most functionally impaired veterans belong to the Gulf War Syndrome 2 (Syndrome 2) group, for which subcortical damage due to toxic nerve gas exposure is the suspected cause. Subcortical damage is often associated with specific complex language impairments, and Syndrome 2 veterans have demonstrated poorer vocabulary relative to controls. 11 Syndrome 1, 16 Syndrome 2, 9 Syndrome 3, and 14 age-matched veteran controls from the Seabees Naval Construction Battalion were compared across three measures of complex language. Additionally, functional magnetic resonance imaging (fMRI) was collected during a covert category generation task, and whole-brain functional activity was compared between groups. Results demonstrated that Syndrome 2 veterans performed significantly worse on letter and category fluency relative to Syndrome 1 veterans and controls. They also exhibited reduced activity in the thalamus, putamen, and amygdala, and increased activity in the right hippocampus relative to controls. Syndrome 1 and Syndrome 3 groups tended to show similar, although smaller, differences than the Syndrome 2 group. Hence, these results further demonstrate specific impairments in complex language as well as subcortical and hippocampal involvement in Syndrome 2 veterans. Further research is required to determine the extent of language impairments in this population and the significance of altered neurologic activity in the aforementioned brain regions with the purpose of better characterizing the Gulf War Syndromes.
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Affiliation(s)
- Kristin Moffett
- Department of Clinical and Health Psychology, University of Florida, 1225 Center Drive, Room 3151, Gainesville, FL 32611, USA.
| | - Bruce Crosson
- Department of Veterans Affairs Rehabilitation Research and Development, Brain Rehabilitation Research Center of Excellence, Malcolm Randall VA Medical Center, 1601 S.W. Archer Road, Gainesville, FL 32608-1197, USA; Department of Veterans Affairs Rehabilitation Research and Development, Center of Excellence for Visual and Neurocognitive Rehabilitation, 1670 Clairmont Rd., Decatur, GA 30033, USA; Departments of Neurology and Radiology, Emory University, 101 Woodruff Circle, Suite 6000, Atlanta, GA 30322, USA; Department of Psychology, Georgia State University, PO Box 5010, Atlanta, GA 303025010, USA.
| | - Jeffrey S Spence
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Kimberly Case
- Department of Clinical and Health Psychology, University of Florida, 1225 Center Drive, Room 3151, Gainesville, FL 32611, USA.
| | - Ilana Levy
- Department of Clinical and Health Psychology, University of Florida, 1225 Center Drive, Room 3151, Gainesville, FL 32611, USA.
| | - Kaundinya Gopinath
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Parina Shah
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Aman Goyal
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Yan Fang
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Richard W Briggs
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA; Department of Physics & Astronomy, Georgia State University, Atlanta, GA 30302-5060, USA.
| | - John Hart
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
| | - Anna Moore
- Center for Rehabilitation Medicine, Emory University, 101 Woodruff Circle, Suite 6000, Atlanta, GA 30322, USA.
| | - Robert W Haley
- Departments of Internal Medicine (Epidemiology Division) and Radiology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd., Dallas, TX 75390-8874, USA.
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Zimmermann H, Rolfsnes HO, Montag S, Wilting J, Droby A, Reuter E, Gawehn J, Zipp F, Gröger A. Putaminal alteration in multiple sclerosis patients with spinal cord lesions. J Neural Transm (Vienna) 2015; 122:1465-73. [PMID: 25971605 DOI: 10.1007/s00702-015-1406-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Accepted: 05/04/2015] [Indexed: 10/23/2022]
Abstract
Typical multiple sclerosis (MS) lesions occur in the brain as well as in the spinal cord. However, two extreme magnetic resonance imaging phenotypes appear occasionally: those with predominantly spinal cord lesions (MS + SL) and those with cerebral lesions and no detectable spinal lesions (MS + CL). We assessed whether morphological differences can be found between these two extreme phenotypes. We examined 19 patients with MS + SL, 18 with MS + CL and 20 controls. All subjects were examined using magnetic resonance imaging, including anatomical and diffusion tensor imaging sequences. Voxel-based morphologic and regions of interest-based analyses and tract-based spatial statistics were performed. Patients also underwent neuropsychological testing. Demographic, clinical and neuropsychological characteristics did not differ between MS + SL and MS + CL patients. Patients with MS + SL showed significantly larger putamen volumes than those with MS + CL which correlated negatively with disability. Compared to controls, only MS + CL revealed clear cortical and deep gray matter atrophy, which correlated with cerebral lesion volume. Additionally, extensive white matter microstructural damage was found only in MS + CL compared to MS + SL and controls in the tract-based spatial statistics. Higher putamen volumes in MS + SL could suggest compensatory mechanisms in this area responsible for motor control. Widely reduced fractional anisotropy values in MS + CL were caused by higher cerebral lesion volume and thus presumably stronger demyelination, which subsequently leads to higher global gray matter atrophy.
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120
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Martín-Flores N, Romaní-Aumedes J, Rué L, Canal M, Sanders P, Straccia M, Allen ND, Alberch J, Canals JM, Pérez-Navarro E, Malagelada C. RTP801 Is Involved in Mutant Huntingtin-Induced Cell Death. Mol Neurobiol 2015; 53:2857-2868. [PMID: 25876513 DOI: 10.1007/s12035-015-9166-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 03/30/2015] [Indexed: 01/16/2023]
Abstract
RTP801 expression is induced by cellular stress and has a pro-apoptotic function in non-proliferating differentiated cells such as neurons. In several neurodegenerative disorders, including Parkinson's disease and Alzheimer's disease, elevated levels of RTP801 have been observed, which suggests a role for RTP801 in neuronal death. Neuronal death is also a pathological hallmark in Huntington's disease (HD), an inherited neurodegenerative disorder caused by a CAG repeat expansion in the huntingtin gene. Currently, the exact mechanisms underlying mutant huntingtin (mhtt)-induced toxicity are still unclear. Here, we investigated whether RTP801 is involved in (mhtt)-induced cell death. Ectopic exon-1 mhtt elevated RTP801 mRNA and protein levels in nerve growth factor (NGF)-differentiated PC12 cells and in rat primary cortical neurons. In neuronal PC12 cells, mhtt also contributed to RTP801 protein elevation by reducing its proteasomal degradation rate, in addition to promoting RTP801 gene expression. Interestingly, silencing RTP801 expression with short hairpin RNAs (shRNAs) blocked mhtt-induced cell death in NGF-differentiated PC12 cells. However, RTP801 protein levels were not altered in the striatum of Hdh(Q7/Q111) and R6/1 mice, two HD models that display motor deficits but not neuronal death. Importantly, RTP801 protein levels were elevated in both neural telencephalic progenitors differentiated from HD patient-derived induced pluripotent stem cells and in the putamen and cerebellum of human HD postmortem brains. Taken together, our results suggest that RTP801 is a novel downstream effector of mhtt-induced toxicity and that it may be relevant to the human disease.
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Affiliation(s)
- Núria Martín-Flores
- Department of Pathological Anatomy, Pharmacology and Microbiology, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain
| | - Joan Romaní-Aumedes
- Department of Pathological Anatomy, Pharmacology and Microbiology, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain
| | - Laura Rué
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Mercè Canal
- Department of Pathological Anatomy, Pharmacology and Microbiology, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain
| | - Phil Sanders
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Marco Straccia
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Nicholas D Allen
- Divisions of Pathophysiology & Repair and Neuroscience, School of Biosciences, Cardiff University, Cardiff, CF10 3AX, UK
| | - Jordi Alberch
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Josep M Canals
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain.,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Esther Pérez-Navarro
- Department of Cell Biology, Immunology and Neurosciences, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain. .,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036, Barcelona, Catalonia, Spain. .,Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain.
| | - Cristina Malagelada
- Department of Pathological Anatomy, Pharmacology and Microbiology, Faculty of Medicine, University of Barcelona, Casanova 143, 08036, Barcelona, Catalonia, Spain.
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121
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Yang Y, Narr KL, Baker LA, Joshi SH, Jahanshad N, Raine A, Thompson PM. Frontal and striatal alterations associated with psychopathic traits in adolescents. Psychiatry Res 2015; 231:333-40. [PMID: 25676553 DOI: 10.1016/j.pscychresns.2015.01.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/15/2014] [Accepted: 01/16/2015] [Indexed: 11/21/2022]
Abstract
Neuroimaging research has demonstrated a range of structural deficits in adults with psychopathy, but little is known about structural correlates of psychopathic tendencies in adolescents. Here we examined structural magnetic resonance imaging (sMRI) data obtained from 14-year-old adolescents (n=108) using tensor-based morphometry (TBM) to isolate global and localized differences in brain tissue volumes associated with psychopathic traits in this otherwise healthy developmental population. We found that greater levels of psychopathic traits were correlated with increased brain tissue volumes in the left putamen, left ansa peduncularis, right superiomedial prefrontal cortex, left inferior frontal cortex, right orbitofrontal cortex, and right medial temporal regions and reduced brain tissues volumes in the right middle frontal cortex, left superior parietal lobule, and left inferior parietal lobule. Post hoc analyses of parcellated regional volumes also showed putamen enlargements to correlate with increased psychopathic traits. Consistent with earlier studies, findings suggest poor decision-making and emotional dysregulation associated with psychopathy may be due, in part, to structural anomalies in frontal and temporal regions whereas striatal structural variations may contribute to sensation-seeking and reward-driven behavior in psychopathic individuals. Future studies will help clarify how disturbances in brain maturational processes might lead to the developmental trajectory from psychopathic tendencies in adolescents to adult psychopathy.
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122
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Goldstein DS, Sullivan P, Holmes C, Kopin IJ, Sharabi Y, Mash DC. Decreased vesicular storage and aldehyde dehydrogenase activity in multiple system atrophy. Parkinsonism Relat Disord 2015; 21:567-72. [PMID: 25829070 DOI: 10.1016/j.parkreldis.2015.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 02/28/2015] [Accepted: 03/05/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Parkinson disease (PD) and multiple system atrophy (MSA) share some neuropathologic features (nigrostriatal dopaminergic lesion, alpha-synuclein deposition) but not others (Lewy bodies in PD, glial cytoplasmic inclusions in MSA). In PD evidence has accrued for a vesicular storage defect and decreased aldehyde dehydrogenase (ALDH) activity in residual dopaminergic terminals, resulting in accumulation of the toxic dopamine (DA) metabolite 3,4-dihydroxyphenylacetaldehyde (DOPAL). In this study we asked whether MSA entails a similar abnormal neurochemical pattern. METHODS DA and its main neuronal metabolite 3,4-dihydroxyphenylacetic acid (DOPAC), norepinephrine (NE) and its main neuronal metabolite 3,4-dihydroxyphenylglycol (DHPG), the catecholamine precursor DOPA, and DOPAL were measured in striatal and frontal cortical tissue from patients with pathologically proven end-stage MSA (N = 15), sporadic PD (N = 17), and control subjects (N = 18). RESULTS Compared to the control group, the MSA and PD groups had similarly decreased putamen DA (by 96% and 93%, p < 0.0001), DOPAC (97% and 95%, p < 0.0001), NE (91% and 74%, p < 0.0001), and DHPG (81% and 74%, p < 0.0001). In the MSA and PD groups, ratios of DOPAL:DA were 2.3 and 3.5 times control and DHPG:NE 3.1 and 2.6 times control, while DOPAC:DOPAL ratios were decreased by 61% and 74%. In both diseases cortical NE and DHPG were decreased, while DA and DOPAC were not. CONCLUSIONS MSA and PD entail a catecholamine metabolic profile indicating impaired vesicular storage, decreased ALDH activity, and DOPAL buildup, which might be part of a common pathway in catecholamine neuronal death. Targeting this pathway by interfering with catecholaldehyde production or effects constitutes a novel treatment approach.
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Affiliation(s)
- David S Goldstein
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA.
| | - Patricia Sullivan
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA
| | - Courtney Holmes
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA
| | - Irwin J Kopin
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA
| | - Yehonatan Sharabi
- Department of Internal Medicine, Chaim Sheba Medical Center, Tel-HaShomer, and Sackler Faculty of Medicine, Tel-Aviv University, Israel
| | - Deborah C Mash
- Department of Neurology, Miller School of Medicine, University of Miami, Miami, FL, USA
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123
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Smith RC, O'Bryan LM, Mitchell PJ, Leung D, Ghanem M, Wilson JM, Hanson JC, Sossick S, Cooper J, Huang L, Merchant KM, Lu J, O'Neill MJ. Increased brain bio-distribution and chemical stability and decreased immunogenicity of an engineered variant of GDNF. Exp Neurol 2015; 267:165-76. [PMID: 25771799 DOI: 10.1016/j.expneurol.2015.03.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Revised: 02/05/2015] [Accepted: 03/06/2015] [Indexed: 01/22/2023]
Abstract
Several lines of evidence indicate that Glial cell line-derived neurotrophic factor (GDNF) is a trophic factor for dopaminergic neurons. Direct parenchymal administration of GDNF is robustly neuroprotective and neurorestorative in multiple neurotoxin-based animal models (rat and non-human primate (NHP)) of Parkinson's Disease (PD), suggesting its potential as a therapeutic agent. Although small, open-label clinical trials of intra-putamenal administration of bacteria-derived, full length, wild type GDNF (GDNFwt) were efficacious in improving standardized behavioral scores, a double-blinded, randomized controlled trial failed to do so. We hypothesize that the lack of clinical efficacy of GDNFwt in the larger randomized trial was due to poor bio-distribution in the putamen and/or poor chemical stability while in the delivery device for prolonged time periods at 37°C. The development of neutralizing antibodies in some patients may also have been a contributing factor. GDNFv is an engineered form of GDNFwt, expressed and purified from mammalian cells, designed to overcome these limitations, including removal of the N-terminal heparin-binding domain to improve its diffusivity in brain parenchyma by reducing its binding to extracellular matrix (ECM), and key amino acid substitutions to improve chemical stability. Intra-striatal administration of a single injection of GDNFv in the rat produced significantly greater brain distribution than GDNFwt, consistent with reduced binding to ECM. Using liquid chromatography/mass spectrometry (LS/MS) methods GDNFv was shown to have improved chemical stability compared to GDNFwt when stored at 37°C for 4weeks. In addition, GDNFv resulted in lower predicted clinical immunogenicity compared to GDNFwt, as demonstrated by reduced CD4+ T cell proliferation and reduced IL-2-induced secretion in peripheral blood mononucleated cells collected from volunteers representing the world's major histocompatibility complex (MHC) haplotypes. GDNFv was demonstrated to be pharmacologically equivalent to GDNFwt in the key parameters in vitro of GFRα1 receptor binding, c-Ret phosphorylation, neurite outgrowth, and in vivo in its ability to increase dopamine turnover (DA). GDNFv protected dopamine nerve terminals and neurons in a 6-hydroxy-dopamine (6-OHDA) rat model. In summary, we empirically demonstrate the superior properties of GDNFv compared to GDNFwt through enhanced bio-distribution and chemical stability concurrently with decreased predicted clinical immunogenicity while maintaining pharmacological and neurotrophic activity. These data indicate that GDNFv is an improved version of GDNF suitable for clinical assessment as a targeted regenerative therapy for PD.
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Affiliation(s)
- Rosamund C Smith
- Eli Lilly & Co., Biotechnology Discovery Research, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Linda M O'Bryan
- Eli Lilly & Co., Biotechnology Discovery Research, Lilly Corporate Center, Indianapolis, IN 46285, USA. o'
| | - Pamela J Mitchell
- Eli Lilly & Co., Biotechnology Discovery Research, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Donmienne Leung
- Eli Lilly & Co., Lilly Biotechnology Center, 10300 Campus Point Dr, Suite 200, San Diego, CA 92121, USA.
| | - Mahmoud Ghanem
- Eli Lilly & Co., Biotechnology Discovery Research, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Jonathan M Wilson
- Eli Lilly & Co., Tailored Therapeutics, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Jeff C Hanson
- Eli Lilly & Co., Information Technology, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Sandra Sossick
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK.
| | - Jane Cooper
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK.
| | - Lihua Huang
- Eli Lilly & Co., Bioproduct Research and Development, Indianapolis, IN 46285, USA.
| | - Kalpana M Merchant
- Eli Lilly & Co., Tailored Therapeutics, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Jirong Lu
- Eli Lilly & Co., Biotechnology Discovery Research, Lilly Corporate Center, Indianapolis, IN 46285, USA.
| | - Michael J O'Neill
- Eli Lilly & Co. Ltd, Erl Wood Manor, Windlesham, Surrey GU20 6PH, UK.
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124
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Lin X, Shi M, Masilamoni JG, Dator R, Movius J, Aro P, Smith Y, Zhang J. Proteomic profiling in MPTP monkey model for early Parkinson disease biomarker discovery. Biochim Biophys Acta 2015; 1854:779-87. [PMID: 25617661 DOI: 10.1016/j.bbapap.2015.01.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2014] [Revised: 01/09/2015] [Accepted: 01/16/2015] [Indexed: 01/02/2023]
Abstract
Identification of reliable and robust biomarkers is crucial to enable early diagnosis of Parkinson disease (PD) and monitoring disease progression. While imperfect, the slow, chronic 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced non-human primate animal model system of parkinsonism is an abundant source of pre-motor or early stage PD biomarker discovery. Here, we present a study of a MPTP rhesus monkey model of PD that utilizes complementary quantitative iTRAQ-based proteomic, glycoproteomics and phosphoproteomics approaches. We compared the glycoprotein, non-glycoprotein, and phosphoprotein profiles in the putamen of asymptomatic and symptomatic MPTP-treated monkeys as well as saline injected controls. We identified 86 glycoproteins, 163 non-glycoproteins, and 71 phosphoproteins differentially expressed in the MPTP-treated groups. Functional analysis of the data sets inferred the biological processes and pathways that link to neurodegeneration in PD and related disorders. Several potential biomarkers identified in this study have already been translated for their usefulness in PD diagnosis in human subjects and further validation investigations are currently under way. In addition to providing potential early PD biomarkers, this comprehensive quantitative proteomic study may also shed insights regarding the mechanisms underlying early PD development. This article is part of a Special Issue entitled: Neuroproteomics: Applications in neuroscience and neurology.
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Affiliation(s)
- Xiangmin Lin
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA; School of Life Sciences, Fujian Agricultural and Forestry University, Fuzhou, Fujian, China
| | - Min Shi
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA
| | | | - Romel Dator
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA
| | - James Movius
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA
| | - Patrick Aro
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA
| | - Yoland Smith
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA; Department of Neurology, Emory University, Atlanta, GA, USA
| | - Jing Zhang
- Department of Pathology, University of Washington School of Medicine, Seattle, WA, USA.
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125
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Hong SB, Harrison BJ, Dandash O, Choi EJ, Kim SC, Kim HH, Shim DH, Kim CD, Kim JW, Yi SH. A selective involvement of putamen functional connectivity in youth with internet gaming disorder. Brain Res 2014; 1602:85-95. [PMID: 25553620 DOI: 10.1016/j.brainres.2014.12.042] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 12/05/2014] [Accepted: 12/20/2014] [Indexed: 01/07/2023]
Abstract
Brain cortico-striatal circuits have consistently been implicated in the pathology of addiction related disorders. We applied a reliable seed-based analysis of the resting-state brain activity to comprehensively delineate the subdivisions of striatal functional connectivity implicated in internet gaming disorder. Among twelve right-handed male adolescents with internet gaming disorder and 11 right-handed and gender-matched healthy controls, we examined group differences in the functional connectivity of dorsal and ventral subdivisions of the caudate nucleus and putamen, as well as the association of these connectivity indices with behavioral measures of internet use. Adolescents with internet gaming disorder showed significantly reduced dorsal putamen functional connectivity with the posterior insula-parietal operculum. More time spent playing online games predicted significantly greater functional connectivity between the dorsal putamen and bilateral primary somatosensory cortices in adolescents with internet gaming disorder, and significantly lower functional connectivity between the dorsal putamen and bilateral sensorimotor cortices in healthy controls. The dorsal putamen functional connectivity was significantly and specifically different in adolescents with internet gaming disorder. The findings suggest a possible biomarker of internet gaming disorder.
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Affiliation(s)
- Soon-Beom Hong
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, University of Melbourne and Melbourne Health, Parkville, Victoria, Australia; Florey Institute of Neuroscience and Mental Health, Parkville, Victoria, Australia; Division of Child and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ben J Harrison
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, University of Melbourne and Melbourne Health, Parkville, Victoria, Australia
| | - Orwa Dandash
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, University of Melbourne and Melbourne Health, Parkville, Victoria, Australia
| | - Eun-Jung Choi
- Department of Child Development and Family Studies, College of Human Ecology, Seoul National University, Seoul, Republic of Korea
| | - Seong-Chan Kim
- Seoul-Top Psychiatric Clinic, Gyeonggi, Republic of Korea
| | - Ho-Hyun Kim
- Interdisciplinary Program (Early Childhood Education Major), College of Education, Seoul National University, Seoul, Republic of Korea
| | - Do-Hyun Shim
- Department of Child Development and Family Studies, College of Human Ecology, Seoul National University, Seoul, Republic of Korea
| | - Chang-Dai Kim
- Department of Education (Educational Counseling Major), College of Education, Seoul National University, Seoul, Republic of Korea
| | - Jae-Won Kim
- Division of Child and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea
| | - Soon-Hyung Yi
- Department of Child Development and Family Studies, College of Human Ecology, Seoul National University, Seoul, Republic of Korea.
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126
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Desbordes G, Li A, Loggia ML, Kim J, Schalock PC, Lerner E, Tran TN, Ring J, Rosen BR, Kaptchuk TJ, Pfab F, Napadow V. Evoked itch perception is associated with changes in functional brain connectivity. Neuroimage Clin 2014; 7:213-21. [PMID: 25610783 PMCID: PMC4300003 DOI: 10.1016/j.nicl.2014.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/28/2014] [Accepted: 12/01/2014] [Indexed: 02/07/2023]
Abstract
Chronic itch, a highly debilitating condition, has received relatively little attention in the neuroimaging literature. Recent studies suggest that brain regions supporting itch in chronic itch patients encompass sensorimotor and salience networks, and corticostriatal circuits involved in motor preparation for scratching. However, how these different brain areas interact with one another in the context of itch is still unknown. We acquired BOLD fMRI scans in 14 atopic dermatitis patients to investigate resting-state functional connectivity before and after allergen-induced itch exacerbated the clinical itch perception in these patients. A seed-based analysis revealed decreased functional connectivity from baseline resting state to the evoked-itch state between several itch-related brain regions, particularly the insular and cingulate cortices and basal ganglia, where decreased connectivity was significantly correlated with increased levels of perceived itch. In contrast, evoked itch increased connectivity between key nodes of the frontoparietal control network (superior parietal lobule and dorsolateral prefrontal cortex), where higher increase in connectivity was correlated with a lesser increase in perceived itch, suggesting that greater interaction between nodes of this executive attention network serves to limit itch sensation via enhanced top-down regulation. Overall, our results provide the first evidence of itch-dependent changes in functional connectivity across multiple brain regions. Atopic dermatitis patients were subjected to allergen-induced itch. Evoked itch reduced functional connectivity between itch-related brain regions. Evoked itch increased functional connectivity within frontoparietal control network. The above changes in functional connectivity correlated with perceived itch level. Itch sensation may be top-down regulated by frontoparietal control network.
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Key Words
- AD, atopic dermatitis
- ASL, arterial spin labeling
- Atopic dermatitis
- BA, Brodmann area
- BOLD, blood-oxygen-level dependent
- DMN, default mode network
- ECG, electrocardiography
- Eczema
- GLM, general linear model
- ITCH, evoked itch resting-state scan
- Insula
- L, left
- MNI, Montreal Neurological Institute
- MR, magnetic resonance
- PCC, posterior cingulate cortex
- PET, positron emission tomography
- PMC, premotor cortex
- Pruritus
- Putamen
- R, right
- REST, baseline resting-state scan
- S1/M1, primary sensorimotor cortex
- SCORAD, SCORing atopic dermatitis scale
- SPL, Superior parietal lobule
- VAS, visual analog scale
- aMCC, anterior mid-cingulate cortex
- dlPFC, dorsolateral prefrontal cortex
- fMRI, functional magnetic resonance imaging
- fcMRI, functional connectivity magnetic resonance imaging
- pMCC, posterior mid-cingulate cortex
- vlPFC, ventrolateral prefrontal cortex.
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Affiliation(s)
- Gaëlle Desbordes
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ang Li
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Marco L Loggia
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jieun Kim
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Peter C Schalock
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ethan Lerner
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Thanh N Tran
- Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Johannes Ring
- Department of Dermatology and Allergy, Technische Universität München, Munich, Germany
| | - Bruce R Rosen
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Ted J Kaptchuk
- Department of Internal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Florian Pfab
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA ; Department of Dermatology and Allergy, Technische Universität München, Munich, Germany ; Department of Prevention and Sports Medicine, Technische Universität München, Munich, Germany
| | - Vitaly Napadow
- Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA ; Department of Radiology, Logan College of Chiropractic, Chesterfield, MO, USA ; Department of Biomedical Engineering, Kyunghee University, Yongin, Korea
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127
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Farré D, Muñoz A, Moreno E, Reyes-Resina I, Canet-Pons J, Dopeso-Reyes IG, Rico AJ, Lluís C, Mallol J, Navarro G, Canela EI, Cortés A, Labandeira-García JL, Casadó V, Lanciego JL, Franco R. Stronger Dopamine D1 Receptor-Mediated Neurotransmission in Dyskinesia. Mol Neurobiol 2014; 52:1408-1420. [PMID: 25344317 DOI: 10.1007/s12035-014-8936-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Accepted: 10/09/2014] [Indexed: 11/26/2022]
Abstract
Radioligand binding assays to rat striatal dopamine D1 receptors showed that brain lateralization of the dopaminergic system were not due to changes in expression but in agonist affinity. D1 receptor-mediated striatal imbalance resulted from a significantly higher agonist affinity in the left striatum. D1 receptors heteromerize with dopamine D3 receptors, which are considered therapeutic targets for dyskinesia in parkinsonian patients. Expression of both D3 and D1-D3 receptor heteromers were increased in samples from 6-hydroxy-dopamine-hemilesioned rats rendered dyskinetic by treatment with 3, 4-dihydroxyphenyl-L-alanine (L-DOPA). Similar findings were obtained using striatal samples from primates. Radioligand binding studies in the presence of a D3 agonist led in dyskinetic, but not in lesioned or L-DOPA-treated rats, to a higher dopamine sensitivity. Upon D3-receptor activation, the affinity of agonists for binding to the right striatal D1 receptor increased. Excess dopamine coming from L-DOPA medication likely activates D3 receptors thus making right and left striatal D1 receptors equally responsive to dopamine. These results show that dyskinesia occurs concurrently with a right/left striatal balance in D1 receptor-mediated neurotransmission.
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MESH Headings
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology
- Animals
- Caudate Nucleus/drug effects
- Caudate Nucleus/physiopathology
- Corpus Striatum/drug effects
- Corpus Striatum/physiopathology
- Dimerization
- Dominance, Cerebral/drug effects
- Dopamine/metabolism
- Dopamine Agonists/pharmacology
- Dyskinesia, Drug-Induced/etiology
- Dyskinesia, Drug-Induced/physiopathology
- Gene Expression Regulation/drug effects
- Levodopa/pharmacology
- Levodopa/toxicity
- Macaca fascicularis
- Male
- Oxidopamine/toxicity
- Parkinsonian Disorders/chemically induced
- Parkinsonian Disorders/physiopathology
- Putamen/drug effects
- Putamen/physiopathology
- Radioligand Assay
- Rats
- Rats, Wistar
- Receptors, Dopamine D1/agonists
- Receptors, Dopamine D1/biosynthesis
- Receptors, Dopamine D1/genetics
- Receptors, Dopamine D1/physiology
- Receptors, Dopamine D3/biosynthesis
- Receptors, Dopamine D3/genetics
- Receptors, Dopamine D3/physiology
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Affiliation(s)
- Daniel Farré
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Ana Muñoz
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Santiago de Compostela, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Estefanía Moreno
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Irene Reyes-Resina
- Neuroscience Department, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
| | - Júlia Canet-Pons
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
| | - Iria G Dopeso-Reyes
- Neuroscience Department, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Alberto J Rico
- Neuroscience Department, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Carme Lluís
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Josefa Mallol
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Gemma Navarro
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Enric I Canela
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Antonio Cortés
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - José L Labandeira-García
- Laboratory of Neuroanatomy and Experimental Neurology, Department of Morphological Sciences, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Santiago de Compostela, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Vicent Casadó
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - José L Lanciego
- Neuroscience Department, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Rafael Franco
- Department of Biochemistry and Molecular Biology, Faculty of Biology, Universitat de Barcelona, Diagonal 645, Prevosti Building, 08028, Barcelona, Spain.
- Neuroscience Department, Center for Applied Medical Research (CIMA), University of Navarra, Pamplona, Spain.
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain.
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128
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Okoshi Y, Hayashi M, Kanda S, Yamamoto T. An autopsy case of microencephaly, bizarre putaminal lesion, and cerebellar atrophy with heart and liver diseases. Brain Dev 2014; 36:707-10. [PMID: 24491944 DOI: 10.1016/j.braindev.2013.11.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 11/25/2013] [Accepted: 11/29/2013] [Indexed: 10/25/2022]
Abstract
We reported a 64-year-old autopsy case, showing a unique combination of disorders in visceral organs and brain. She had developmental delay, microencephaly, and facial dysmorphism. She developed sick sinus syndrome and liver cirrhosis. There were no abnormalities in laboratory tests for congenital metabolic errors or anomaly syndromes, including activities of lysosomal enzymes, isoelectric focusing of serum transferrin or array comparative genomic hybridization. She died of cardiorespiratory failure. At autopsy she showed liver cirrhosis and mesangial proliferation. The brain weighed 710 g. Bizarre putaminal changes were found, in which the size of area of putamen in coronal sections was small, aberrant fiber running was increased, and immunoreactivity for tyrosine hydroxylase was reduced. Loss of Purkinje cells was found throughout the cerebellar cortex. She had unreported combination of developmental delay, facial dysmorphism, small brain, bizarre putaminal lesion, cerebellar atrophy, cardiac disease, liver cirrhosis and renal disease. Although the exact cause of disease still remains to be investigated, it will be a clue for the establishment of new disease entity to accumulate subjects having the similar phenotype.
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Affiliation(s)
- Yumi Okoshi
- Department of Brain Development and Neural Regeneration, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan; Department of Pediatrics, Tokyo Metropolitan Fuchu Medical Center for the Disabled, Tokyo, Japan
| | - Masaharu Hayashi
- Department of Brain Development and Neural Regeneration, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.
| | - Sachiko Kanda
- Department of Developmental Medical Sciences, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toshiyuki Yamamoto
- Tokyo Women's Medical University, Institute for Integrated Medical Sciences, Tokyo, Japan
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129
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Villar-Menéndez I, Porta S, Buira SP, Pereira-Veiga T, Díaz-Sánchez S, Albasanz JL, Ferrer I, Martín M, Barrachina M. Increased striatal adenosine A2A receptor levels is an early event in Parkinson's disease-related pathology and it is potentially regulated by miR-34b. Neurobiol Dis 2014; 69:206-14. [PMID: 24892887 DOI: 10.1016/j.nbd.2014.05.030] [Citation(s) in RCA: 85] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/01/2014] [Accepted: 05/22/2014] [Indexed: 12/20/2022] Open
Abstract
Adenosine A2A receptor (A2AR) is a G-protein coupled receptor that stimulates adenylyl cyclase activity. In the brain, A2ARs are found highly enriched in striatal GABAergic medium spiny neurons, related to the control of voluntary movement. Pharmacological modulation of A2ARs is particularly useful in Parkinson's disease (PD) due to their property of antagonizing dopamine D2 receptor activity. Increases in A2AR levels have been described in PD patients showing an important loss of dopaminergic denervation markers, but no data have been reported about A2AR levels in incidental PD brains. In the present report, we show that increased A2ARs protein levels were also detected in the putamen of incidental PD cases (Braak PD stages 1-2) with respect to age-matched controls. By contrast, A2ARs mRNA levels remained unchanged, suggesting that posttranslational mechanisms could be involved in the regulation of A2ARs. It has been described how miR-34b/c downregulation is an early event in PD cases. We found that miR-34b levels are also significantly reduced in the putamen of incidental PD cases and along disease progression. Given that 3'UTR of A2AR contains a predicted target site for miR-34b, the potential role of this miRNA in protein A2AR levels was assessed. In vitro studies revealed that endogenous A2AR protein levels increased when miR-34b function was blocked using a specific anti-miR-34b. Moreover, using a luciferase reporter assay with point mutations in a miR-34b predicted binding site within the 3'UTR region of A2AR mRNA abolished the effect of the miRNA using a miR-34b mimic. In addition, we showed a reduced percentage of DNA methylation in the 5'UTR region of ADORA2A in advanced PD cases. Overall, these findings reveal that increased A2AR protein levels occur in asymptomatic PD patients and provide new insights into the molecular mechanisms underlying A2AR expression levels along the progression of this neurodegenerative disease.
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130
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Sandman CA, Head K, Muftuler LT, Su L, Buss C, Davis EP. Shape of the basal ganglia in preadolescent children is associated with cognitive performance. Neuroimage 2014; 99:93-102. [PMID: 24844741 DOI: 10.1016/j.neuroimage.2014.05.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Revised: 05/08/2014] [Accepted: 05/10/2014] [Indexed: 10/25/2022] Open
Abstract
Current studies support the belief that high levels of performance and intellectual abilities are associated with increased brain size or volume. With few exceptions, this conclusion is restricted to studies of post-adolescent subjects and to cerebral cortex. There is evidence that "bigger is better" may not pertain to children and further, that there are areas of the brain in which larger structures are associated with cognitive deficits. In 50 preadolescent children (21 girls) a structural survey of the brain (VBM) was conducted to determine and locate areas in which gray matter volume was associated with poor cognitive performance. Only increased gray matter volume in particular areas of the basal ganglia and specifically the putamen was significantly associated with poor performance on tests of memory, response speed and a general marker and subtests of intelligence. Based on the VBM findings, volumetric analysis of basal ganglia structures was performed using FSL/FIRST. However, no significant changes in total volume of putamen or other basal ganglia structures were detected with this analysis. The disagreement between measures of localized gray matter differences and volumetric analysis suggested that there might be local regional deformity rather than widespread volumetric changes of the putamen. Surface analysis with FSL/FIRST demonstrated that bilateral outward deformation of the putamen, but especially the left, was associated with poor performance on several cognitive tests. Expansion of the globus pallidus and caudate nucleus also was associated with poor performance. Moreover a significant association was detected between a reliable test of language-free intelligence and topographically distinct outward and inward deformation of the putamen. Expansion and contraction of the putamen as a predictor of intelligence may explain why this association was not observed with measures of total volume. These results suggest that deformity is a sensitive measure of function, and that distortion of the basal ganglia may be a neurophenotype for risk of developmental impairment.
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Affiliation(s)
- Curt A Sandman
- Early Human and Lifespan Development Program, Department of Psychiatry and Human Behavior, University of California Irvine, USA.
| | - Kevin Head
- Early Human and Lifespan Development Program, Department of Psychiatry and Human Behavior, University of California Irvine, USA
| | | | - Lydia Su
- Department of Radiological Sciences, University of California Irvine, USA
| | - Claudia Buss
- Early Human and Lifespan Development Program, Department of Psychiatry and Human Behavior, University of California Irvine, USA; Department of Pediatrics, University of California Irvine, USA; Institut für Medizinische Psychologie, Charité Centrum für Human- und Gesundheitswissenschaften, Charité Universitätsmedizin, Germany
| | - Elysia Poggi Davis
- Early Human and Lifespan Development Program, Department of Psychiatry and Human Behavior, University of California Irvine, USA; Department of Psychology, University of Denver, USA
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131
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Sako W, Murakami N, Izumi Y, Kaji R. The difference in putamen volume between MSA and PD: evidence from a meta-analysis. Parkinsonism Relat Disord 2014; 20:873-7. [PMID: 24844749 DOI: 10.1016/j.parkreldis.2014.04.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/18/2014] [Accepted: 04/29/2014] [Indexed: 11/17/2022]
Abstract
BACKGROUND The accurate and non-invasive tool for differential diagnosis between multiple system atrophy (MSA) and Parkinson's disease (PD) is needed at the early stage of disease for clinical trials of disease modifying therapy. PET is helpful, but the availability is limited. MRI is considered to be more available and potential method instead of PET. We aimed to investigate the effect of MSA and PD on putamen volume using a meta-analysis approach. METHODS A computer literature search yielded 6 eligible studies. Putamen volume was expressed as the standardized mean difference between MSA and PD patients. Moreover, subgroup analyses planed to be performed in order to identify factors which contributed to heterogeneity if included studies were not homogeneous. The proportion of variation due to heterogeneity was computed and expressed as I(2). RESULTS Six studies, comprising a sample size of 84 MSA and 180 PD, were included in this meta-analysis. The overall effect indicated that putamen volume in MSA was significantly more reduced than that in PD with heterogeneous studies (P = 0.0004, 6 studies, n = 264, I(2) = 87%). A subgroup analysis revealed that the category of "Hoehn-Yahr stage of PD" showed a significant subgroup difference with a significant subgroup summary effect (subgroup difference: P = 0.003). CONCLUSIONS Our findings based on group-level analysis suggested that volumetry of the putamen could be useful for differential diagnosis between MSA and PD at the early stage of disease, and also help to enroll more accurate disease group for disease modifying study in future.
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Affiliation(s)
- Wataru Sako
- Department of Clinical Neuroscience, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan; Center for Neurosciences, The Feinstein Institute for Medical Research, Manhasset, NY, USA.
| | - Nagahisa Murakami
- Department of Clinical Neuroscience, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Yuishin Izumi
- Department of Clinical Neuroscience, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Ryuji Kaji
- Department of Clinical Neuroscience, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
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132
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Villar-Menéndez I, Díaz-Sánchez S, Blanch M, Albasanz JL, Pereira-Veiga T, Monje A, Planchat LM, Ferrer I, Martín M, Barrachina M. Reduced striatal adenosine A2A receptor levels define a molecular subgroup in schizophrenia. J Psychiatr Res 2014; 51:49-59. [PMID: 24433848 DOI: 10.1016/j.jpsychires.2013.12.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 11/13/2013] [Accepted: 12/20/2013] [Indexed: 01/02/2023]
Abstract
Schizophrenia (SZ) is a mental disorder of unknown origin. Some scientific evidence seems to indicate that SZ is not a single disease entity, since there are patient groups with clear symptomatic, course and biomarker differences. SZ is characterized by a hyperdopaminergic state related to high dopamine D2 receptor activity. It has also been proposed that there is a hypoadenosynergic state. Adenosine is a nucleoside widely distributed in the organism with neuromodulative and neuroprotective activity in the central nervous system. In the brain, the most abundant adenosine receptors are A1R and A2AR. In the present report, we characterize the presence of both receptors in human postmortem putamens of patients suffering SZ with real time TaqMan PCR, western blotting and radioligand binding assay. We show that A1R levels remain unchanged with respect to age-matched controls, whereas nearly fifty percent of patients have reduced A2AR, at the transcriptional and translational levels. Moreover, we describe how DNA methylation plays a role in the pathological A2AR levels with the bisulfite-sequencing technique. In fact, an increase in 5-methylcytosine percentage in the 5' UTR region of ADORA2A was found in those SZ patients with reduced A2AR levels. Interestingly, there was a relationship between the A2A/β-actin ratio and motor disturbances as assessed with some items of the PANSS, AIMS and SAS scales. Therefore, there may be a subgroup of SZ patients with reduced striatal A2AR levels accompanied by an altered motor phenotype.
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Affiliation(s)
- Izaskun Villar-Menéndez
- Institute of Neuropathology, Bellvitge University Hospital-ICS, [Bellvitge Biomedical Research Institute-] IDIBELL, L'Hospitalet de Llobregat, Spain
| | - Sara Díaz-Sánchez
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencia y Tecnologías Químicas, Centro Regional de Investigaciones Biomédicas (CRIB), Universidad de Castilla-La Mancha, Ciudad Real, Spain; Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Medicina de Ciudad Real, CRIB, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | - Marta Blanch
- Institute of Neuropathology, Bellvitge University Hospital-ICS, [Bellvitge Biomedical Research Institute-] IDIBELL, L'Hospitalet de Llobregat, Spain
| | - José Luis Albasanz
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencia y Tecnologías Químicas, Centro Regional de Investigaciones Biomédicas (CRIB), Universidad de Castilla-La Mancha, Ciudad Real, Spain; Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Medicina de Ciudad Real, CRIB, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | - Thais Pereira-Veiga
- Institute of Neuropathology, Bellvitge University Hospital-ICS, [Bellvitge Biomedical Research Institute-] IDIBELL, L'Hospitalet de Llobregat, Spain
| | - Alfonso Monje
- Banc de Teixits Neurològics-Parc Sanitari Sant Joan de Déu, CIBERSAM, Sant Boi de Llobregat, Spain
| | - Luis Maria Planchat
- Banc de Teixits Neurològics-Parc Sanitari Sant Joan de Déu, CIBERSAM, Sant Boi de Llobregat, Spain
| | - Isidre Ferrer
- Institute of Neuropathology, Bellvitge University Hospital-ICS, [Bellvitge Biomedical Research Institute-] IDIBELL, L'Hospitalet de Llobregat, Spain; Departament de Patologia i Terapèutica Experimental, Universitat de Barcelona, L'Hospitalet de Llobregat, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, CIBERNED, Spain
| | - Mairena Martín
- Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencia y Tecnologías Químicas, Centro Regional de Investigaciones Biomédicas (CRIB), Universidad de Castilla-La Mancha, Ciudad Real, Spain; Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Medicina de Ciudad Real, CRIB, Universidad de Castilla-La Mancha, Ciudad Real, Spain
| | - Marta Barrachina
- Institute of Neuropathology, Bellvitge University Hospital-ICS, [Bellvitge Biomedical Research Institute-] IDIBELL, L'Hospitalet de Llobregat, Spain; Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, CIBERNED, Spain.
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133
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Lim IAL, Li X, Jones CK, Farrell JAD, Vikram DS, van Zijl PCM. Quantitative magnetic susceptibility mapping without phase unwrapping using WASSR. Neuroimage 2014; 86:265-79. [PMID: 24113625 PMCID: PMC3947267 DOI: 10.1016/j.neuroimage.2013.09.072] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 09/03/2013] [Accepted: 09/28/2013] [Indexed: 01/06/2023] Open
Abstract
The magnetic susceptibility of tissue within and around an image voxel affects the magnetic field and thus the local frequency in that voxel. Recently, it has been shown that spatial maps of frequency can be used to quantify local susceptibility if the contributions of surrounding tissue can be deconvolved. Currently, such quantitative susceptibility mapping (QSM) methods employ gradient recalled echo (GRE) imaging to measure spatial differences in the signal phase evolution as a function of echo time, from which frequencies can be deduced. Analysis of these phase images, however, is complicated by phase wraps, despite the availability and usage of various phase unwrapping algorithms. In addition, lengthy high-resolution GRE scanning often heats the magnet bore, causing the magnetic field to drift over several Hertz, which is on the order of the frequency differences between tissues. Here, we explore the feasibility of applying the WAter Saturation Shift Referencing (WASSR) method for 3D whole brain susceptibility imaging. WASSR uses direct saturation of water protons as a function of frequency irradiation offset to generate frequency maps without phase wraps, which can be combined with any image or spectroscopy acquisition. By utilizing a series of fast short-echo-time direct saturation images with multiple radiofrequency offsets, a frequency correction for field drift can be applied based on the individual image phases. Regions of interest were delineated with an automated atlas-based method, and the average magnetic susceptibilities calculated from frequency maps obtained from WASSR correlated well with those from the phase-based multi-echo GRE approach at 3T.
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Affiliation(s)
- Issel Anne L Lim
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA; Department of Biomedical Engineering, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.
| | - Xu Li
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Craig K Jones
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Jonathan A D Farrell
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Deepti S Vikram
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Peter C M van Zijl
- The Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD, USA; F.M. Kirby Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA.
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Doyle-Thomas KA, Card D, Soorya LV, Wang AT, Fan J, Anagnostou E. Metabolic mapping of deep brain structures and associations with symptomatology in autism spectrum disorders. Res Autism Spectr Disord 2014; 8:44-51. [PMID: 24459534 PMCID: PMC3897261 DOI: 10.1016/j.rasd.2013.10.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Structural neuroimaging studies in autism report atypical volume in deep brain structures which are related to symptomatology. Little is known about metabolic changes in these regions, and how they vary with age and sex, and/or relate to clinical behaviors. Using magnetic resonance spectroscopy we measured N-acetylaspartate, choline, creatine, myoinositol and glutamate in the caudate, putamen, and thalamus of 20 children with autism and 16 typically developing controls (7-18 years). Relative to controls, individuals with autism had elevated glutamate/creatine in the putamen. In addition, both groups showed age-related increases in glutamate in this region. Boys, relative to girls had increased choline/creatine in the thalamus. Lastly, there were correlations between glutamate, choline, and myoinositol in all three regions, and behavioral scores in the ASD group. These findings suggest changes in deep gray matter neurochemistry, which are sensitive to diagnosis, age and sex, and are associated with behavioral differences.
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Affiliation(s)
- Krissy A.R. Doyle-Thomas
- Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, University of Toronto, 150 Kilgour Road, Toronto, Ontario, Canada M4G 1R8
| | - Dallas Card
- Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Canada M5G 1X8
- Neurosciences & Mental Health Program, Research Institute, Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, Canada M5G 1X8
| | - Latha V. Soorya
- Departments of Psychiatry and Neuroscience, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - A. Ting Wang
- Departments of Psychiatry and Neuroscience, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029-6574, USA
| | - Jin Fan
- Departments of Psychiatry and Neuroscience, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029-6574, USA
- Department of Psychology, Queens College, City University of New York, 65-30 Kissena Boulevard, Queens, NY 11367-1597, USA
| | - Evdokia Anagnostou
- Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, University of Toronto, 150 Kilgour Road, Toronto, Ontario, Canada M4G 1R8
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135
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Bonaventura J, Rico AJ, Moreno E, Sierra S, Sánchez M, Luquin N, Farré D, Müller CE, Martínez-Pinilla E, Cortés A, Mallol J, Armentero MT, Pinna A, Canela EI, Lluís C, McCormick PJ, Lanciego JL, Casadó V, Franco R. L-DOPA-treatment in primates disrupts the expression of A(2A) adenosine-CB(1) cannabinoid-D(2) dopamine receptor heteromers in the caudate nucleus. Neuropharmacology 2014; 79:90-100. [PMID: 24230991 DOI: 10.1016/j.neuropharm.2013.10.036] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 10/21/2013] [Accepted: 10/23/2013] [Indexed: 11/21/2022]
Abstract
The molecular basis of priming for L-DOPA-induced dyskinesias in Parkinson's disease (PD), which depends on the indirect pathway of motor control, is not known. In rodents, the indirect pathway contains striatopallidal GABAergic neurons that express heterotrimers composed of A(2A) adenosine, CB(1) cannabinoid and D(2) dopamine receptors that regulate dopaminergic neurotransmission. The present study was designed to investigate the expression of these heteromers in the striatum of a primate model of Parkinson's disease and to determine whether their expression and pharmacological properties are altered upon L-DOPA treatment. By using the recently developed in situ proximity ligation assay and by identification of a biochemical fingerprint, we discovered a regional distribution of A(2A)/CB(1) /D(2) receptor heteromers that predicts differential D(2)-mediated neurotransmission in the caudate-putamen of Macaca fascicularis. Whereas heteromers were abundant in the caudate nucleus of both naïve and MPTP-treated monkeys, L-DOPA treatment blunted the biochemical fingerprint and led to weak heteromer expression. These findings constitute the first evidence of altered receptor heteromer expression in pathological conditions and suggest that drugs targeting A(2A)-CB(1) -D(2) receptor heteromers may be successful to either normalize basal ganglia output or prevent L-DOPA-induced side effects.
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136
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Zorrilla EP, Koob GF. Amygdalostriatal projections in the neurocircuitry for motivation: a neuroanatomical thread through the career of Ann Kelley. Neurosci Biobehav Rev 2013; 37:1932-45. [PMID: 23220696 PMCID: PMC3838492 DOI: 10.1016/j.neubiorev.2012.11.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 11/28/2012] [Indexed: 01/25/2023]
Abstract
In MacLean's triune brain, the amygdala putatively subserves motivated behavior by modulating the "reptilian" basal ganglia. Accordingly, Ann Kelley, with Domesick and Nauta, influentially showed that amygdalostriatal projections are much more extensive than were appreciated. They highlighted that amygdalar projections to the rostral ventromedial striatum converged with projections from the ventral tegmental area and cingulate cortex, forming a "limbic striatum". Caudal of the anterior commissure, the entire striatum receives afferents from deep basal nuclei of the amygdala. Orthologous topographic projections subsequently were observed in fish, amphibians, and reptiles. Subsequent functional studies linked acquired value to action via this neuroanatomical substrate. From Dr. Kelley's work evolved insights into components of the distributed, interconnected network that subserves motivated behavior, including the nucleus accumbens shell and core and the striatal-like extended amygdala macrostructure. These heuristic frameworks provide a neuroanatomical basis for adaptively translating motivation into behavior. The ancient amygdala-to-striatum pathways remain a current functional thread not only for stimulus-response valuation, but also for the psychopathological plasticity that underlies addiction-related memory, craving and relapse.
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Affiliation(s)
- Eric P Zorrilla
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037, USA.
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137
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Sterling NW, Du G, Lewis MM, Dimaio C, Kong L, Eslinger PJ, Styner M, Huang X. Striatal shape in Parkinson's disease. Neurobiol Aging 2013; 34:2510-6. [PMID: 23820588 PMCID: PMC3742686 DOI: 10.1016/j.neurobiolaging.2013.05.017] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 05/04/2013] [Accepted: 05/23/2013] [Indexed: 12/16/2022]
Abstract
Parkinson's disease (PD) is marked pathologically by nigrostriatal dopaminergic terminal loss. Histopathological and in vivo labeling studies demonstrate that this loss occurs most extensively in the caudal putamen and caudate head. Previous structural studies have suggested reduced striatal volume and atrophy of the caudate head in PD subjects. The spatial distribution of atrophy in the putamen, however, has not been characterized. We aimed to delineate the specific locations of atrophy in both of these striatal structures. T1- and T2-weighted brain MR (3T) images were obtained from 40 PD and 40 control subjects having no dementia and similar age and gender distributions. Shape analysis was performed using doubly segmented regions of interest. Compared to controls, PD subjects had lower putamen (p = 0.0003) and caudate (p = 0.0003) volumes. Surface contraction magnitudes were greatest on the caudal putamen (p ≤ 0.005) and head and dorsal body of the caudate (p ≤ 0.005). This spatial distribution of striatal atrophy is consistent with the known pattern of dopamine depletion in PD and may reflect global consequences of known cellular remodeling phenomena.
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Affiliation(s)
- Nicholas W. Sterling
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Public Health Sciences, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Guangwei Du
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Mechelle M. Lewis
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Pharmacology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Christopher Dimaio
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Lan Kong
- Department of Public Health Sciences, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Paul J. Eslinger
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Public Health Sciences, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Radiology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
| | - Martin Styner
- Department of Computer Science, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Xuemei Huang
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Pharmacology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Radiology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Neurosurgery, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
- Department of Kinesiology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey PA 17033, USA
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138
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Abstract
It is known that schizophrenia patients are behaviorally supersensitive to dopamine-like drugs (amphetamine, methylphenidate). There is evidence for an increased release of dopamine, a slight increase of dopamine D2 receptors and an increase of dopamine D2High receptors in schizophrenia, all possibly explaining the clinical supersensitivity to dopamine. The elevation in apparent D2High receptors in vivo in schizophrenia matches the elevation in D2High receptors in many animal models of psychosis. The increased amounts of D2High receptors in psychotic-like behavior in animals may result from a loss of control of D2 by various factors. These factors include the rate of phosphorylation and desensitization of D2 receptors by kinases, the attachment of arrestin to D2 receptors, internalization of D2 receptors, the rate of receptor de-phosphorylation, formation of D2 receptor dimers, and GTP regulation by various GTPases. While at present there are no statistically significant associations of any of these controlling factors and their genes with schizophrenia, investigation of D2High receptors in schizophrenia will require a new radioligand in order to selectively label D2High receptors in vivo in patients. Finally, haloperidol reduces the number of D2High receptors that are elevated by amphetamine, indicating that this therapeutic effect may occur clinically.
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Affiliation(s)
- Philip Seeman
- Department of Pharmacology, University of Toronto, 260 Heath Street, West, unit 605, Toronto, Ontario M5P 3L6, Canada; Department of Psychiatry, University of Toronto, 260 Heath Street, West, unit 605, Toronto, Ontario, M5P 3L6, Canada.
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139
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Abstract
Schizophrenia patients are behaviorally supersensitive to dopamine-like drugs such as amphetamine or methylphenidate, meaning that patients respond to such drugs with increased psychotic symptoms, as compared to control subjects. A basis of such supersensitivity may be an increased pre-synaptic release of dopamine or a post-synaptic elevation of D2 receptors or of D2High receptors in active stages of schizophrenia. While the pre-synaptic release of dopamine is normal in stable patients with schizophrenia, brain imaging studies find that D2 receptors are increased by an average of 5.8% in antipsychotic-free schizophrenia patients. It is possible that the behavioral supersensitivity may stem from more D2High receptors in schizophrenia. Although the antipsychotic/dopamine D2 receptor can exist in vitro in a state of high affinity for dopamine (as D2High), or in a state of low affinity for dopamine (as D2Low), there is no clear evidence that D2High states can be selectively labeled or stably exist in vivo. Nevertheless, two studies revealed an 80% increase in apparent D2High receptors in schizophrenia patients after reducing endogenous dopamine. The elevation in apparent D2High receptors in vivo in schizophrenia matches the elevation in D2High receptors in vitro in animal models of psychosis, including dopamine-supersensitive animals pretreated with amphetamine, marijuana, or phencyclidine, or animals with gene knockouts in various neurotransmitter pathways, including those for glutamate receptors. The elevation of D2High receptors in vitro and the increased apparent D2High receptors in vivo is consistent with behavioral dopamine supersensitivity in schizophrenia patients.
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Affiliation(s)
- Philip Seeman
- Department of Psychiatry, University of Toronto, 260 Heath Street, West, Unit 605, Toronto, Ont., Canada M5P 3L6; Department of Pharmacology, University of Toronto, 260 Heath Street, West, Unit 605, Toronto, Ont., Canada M5P 3L6.
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140
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van Wingen GA, van den Brink W, Veltman DJ, Schmaal L, Dom G, Booij J, Crunelle CL. Reduced striatal brain volumes in non-medicated adult ADHD patients with comorbid cocaine dependence. Drug Alcohol Depend 2013; 131:198-203. [PMID: 23726981 DOI: 10.1016/j.drugalcdep.2013.05.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 03/20/2013] [Accepted: 05/02/2013] [Indexed: 01/07/2023]
Abstract
BACKGROUND Adult attention deficit/hyperactivity disorder (ADHD) is highly comorbid with other psychiatric disorders, including substance use disorders (SUD). Patients with ADHD and SUD comorbidity respond less well to pharmacological treatment (e.g., methylphenidate), have more severe ADHD symptoms, and are generally more impulsive than ADHD patients without SUD. However, little is known about structural brain abnormalities that may differentiate ADHD patients with and without comorbid SUD. METHODS We compared regional grey matter volumes of 10 non-medicated male ADHD patients with comorbid cocaine dependence, 14 non-medicated male ADHD patients without cocaine dependence and 15 healthy control participants matched for age and premorbid intellectual functioning, using voxel-based morphometry (VBM) using both a whole-brain analysis and a priori ROI analysis based on the existing ADHD VBM literature. RESULTS In a whole brain analysis, ADHD patients with and without cocaine dependence showed smaller volumes in the right putamen and cerebellum compared to healthy controls. In addition, ADHD patients without cocaine dependence showed larger volumes in the midbrain and in the precentral gyrus compared to healthy control participants and larger volumes in the occipital cortex compared to ADHD patients with comorbid cocaine dependence. A direct comparison using the a priori defined ROI approach showed that ADHD patients with cocaine dependence had smaller putamen volumes than ADHD patients without cocaine dependence. CONCLUSIONS ADHD patients with cocaine dependence show more profound grey matter volume reductions in the striatum compared to ADHD patients without cocaine dependence. Possible implications for treatment are discussed.
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141
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Lim IAL, Faria AV, Li X, Hsu JTC, Airan RD, Mori S, van Zijl PCM. Human brain atlas for automated region of interest selection in quantitative susceptibility mapping: application to determine iron content in deep gray matter structures. Neuroimage 2013; 82:449-69. [PMID: 23769915 DOI: 10.1016/j.neuroimage.2013.05.127] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 05/30/2013] [Accepted: 05/31/2013] [Indexed: 10/26/2022] Open
Abstract
The purpose of this paper is to extend the single-subject Eve atlas from Johns Hopkins University, which currently contains diffusion tensor and T1-weighted anatomical maps, by including contrast based on quantitative susceptibility mapping. The new atlas combines a "deep gray matter parcellation map" (DGMPM) derived from a single-subject quantitative susceptibility map with the previously established "white matter parcellation map" (WMPM) from the same subject's T1-weighted and diffusion tensor imaging data into an MNI coordinate map named the "Everything Parcellation Map in Eve Space," also known as the "EvePM." It allows automated segmentation of gray matter and white matter structures. Quantitative susceptibility maps from five healthy male volunteers (30 to 33 years of age) were coregistered to the Eve Atlas with AIR and Large Deformation Diffeomorphic Metric Mapping (LDDMM), and the transformation matrices were applied to the EvePM to produce automated parcellation in subject space. Parcellation accuracy was measured with a kappa analysis for the left and right structures of six deep gray matter regions. For multi-orientation QSM images, the Kappa statistic was 0.85 between automated and manual segmentation, with the inter-rater reproducibility Kappa being 0.89 for the human raters, suggesting "almost perfect" agreement between all segmentation methods. Segmentation seemed slightly more difficult for human raters on single-orientation QSM images, with the Kappa statistic being 0.88 between automated and manual segmentation, and 0.85 and 0.86 between human raters. Overall, this atlas provides a time-efficient tool for automated coregistration and segmentation of quantitative susceptibility data to analyze many regions of interest. These data were used to establish a baseline for normal magnetic susceptibility measurements for over 60 brain structures of 30- to 33-year-old males. Correlating the average susceptibility with age-based iron concentrations in gray matter structures measured by Hallgren and Sourander (1958) allowed interpolation of the average iron concentration of several deep gray matter regions delineated in the EvePM.
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Affiliation(s)
- Issel Anne L Lim
- Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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142
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Hasan KM, Ali H, Shad MU. Atlas-based and DTI-guided quantification of human brain cerebral blood flow: feasibility, quality assurance, spatial heterogeneity and age effects. Magn Reson Imaging 2013; 31:1445-52. [PMID: 23731534 DOI: 10.1016/j.mri.2013.04.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 04/27/2013] [Indexed: 12/28/2022]
Abstract
Accurate and noninvasive quantification of regional cerebral blood perfusion (CBF) of the human brain tissue would advance the study of the complex interplay between human brain structure and function, in both health and disease. Despite the plethora of works on CBF in gray matter, a detailed quantitative white matter perfusion atlas has not been presented on healthy adults using the International Consortium for Brain Mapping atlases. In this study, we present a host of assurance measures such as temporal stability, spatial heterogeneity and age effects of regional and global CBF in selected deep, cortical gray matter and white matter tracts identified and quantified using diffusion tensor imaging (DTI). We utilized whole brain high-resolution DTI combined with arterial spin labeling to quantify regional CBF on 15 healthy adults aged 23.2-57.1years. We present total brain and regional CBF, corresponding volume, mean diffusivity and fractional anisotropy spatial heterogeneity, and dependence on age as additional quality assurance measures to compare with published trends using both MRI and nuclear medicine methods. Total CBF showed a steady decrease with age in gray matter (r=-0.58; P=.03), whereas total CBF of white matter did not significantly change with age (r=0.11; P=.7). This quantitative report offers a preliminary baseline of CBF, volume and DTI measurements for the design of future multicenter and clinical studies utilizing noninvasive perfusion and DT-MRI.
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Affiliation(s)
- Khader M Hasan
- Medical School, Department of Diagnostic and Interventional Imaging, The University of Texas Health Science Center, Houston, TX 77030, USA.
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143
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Argyropoulos GP, Tremblay P, Small SL. The neostriatum and response selection in overt sentence production: an fMRI study. Neuroimage 2013; 82:53-60. [PMID: 23721723 DOI: 10.1016/j.neuroimage.2013.05.064] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/09/2013] [Accepted: 05/16/2013] [Indexed: 11/21/2022] Open
Abstract
A number of premotor and prefrontal brain areas have been recently shown to play a significant role in response selection in overt sentence production. These areas are anatomically connected to the basal ganglia, a set of subcortical structures that has been traditionally involved in response selection across behavioral domains. The putamen and the caudate, the two major inputs to the basal ganglia, have been shown to undertake motor- as well as non-motor-related selection operations in language processing. Here we investigate the role of these basal ganglia structures in sentence repetition and generation in healthy adults. Although sentence generation is known to activate prefrontal and premotor cortical areas that reciprocally connect with these two neostriatal structures, their specific contributions are not known. We present evidence suggesting that that the putamen undertakes articulation-related aspects across tasks, while the caudate selectively supports selection processes in sentence generation.
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144
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Abstract
The hallmark of Parkinson's disease is on-going degeneration of dopaminergic neurons in the substantia nigra, which may be due to various etiologies. Various approaches to alleviate symptoms are available, such as life-long pharmacological intervention, deep brain stimulation, and transplantation of dopaminergic neuron-containing fetal tissue. However, each of these approaches has a disadvantage. Several studies have shown that various kinds of stem cells, induced pluripotent stem cells, and other cells can differentiate into dopaminergic neurons and may be promising for treating Parkinson's disease in the future. Therefore, this review addresses those cells in terms of their prospects in cell therapy for Parkinson's disease. In addition, the need for safety and efficacy studies, various cell delivery modes and sites, and possible side effects will be discussed.
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145
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Lee JH, Baik SK. Putaminal hypointensity in the parkinsonian variant of multiple system atrophy: simple visual assessment using susceptibility-weighted imaging. J Mov Disord 2011; 4:60-3. [PMID: 24868396 PMCID: PMC4027686 DOI: 10.14802/jmd.11012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Accepted: 10/11/2011] [Indexed: 01/14/2023] Open
Abstract
Background and Purpose Susceptibility-weighted imaging (SWI) has been shown to be superior in its ability to demonstrate brain mineralization than other conventional MR imaging. The goal of our study was therefore to assess the frequency and extent of putaminal hypointensity in parkinsonian variant MSA using SWI. Methods 11 patients with multiple system atrophy-parkinsonian type (MSA-p), 30 patients with Parkinson’s disease (PD), and age matched 30 controls were investigated using 3 Tesla MRI. The pattern of putaminal hypointensity was measured using a visual grading scale and scored from 0 to 3. Results Hemi- or bilateral putaminal hypointensity (a score of ≥ 2) and hyperintense rim were recognized in 81.8% and 54.5% of 11 MSA-p, respectively. The scores of putaminal hypointensity of MSA-p were significantly higher than other groups (p < 0.001), a score of ≥ 2 differentiated MSA-p from other groups. And all five patients with early disease stage also showed these characteristic findings. Conclusions SWI appears to be useful for depicting putaminal hypointensity even in early stage of MSA-p. This finding suggests that iron deposition associated putaminal degeneration can occur early in the disease process.
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Affiliation(s)
- Jae-Hyeok Lee
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Seung-Kug Baik
- Department of Diagnostic Radiology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, Korea
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146
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Shin HY, Kang SY, Yang JH, Kim HS, Lee MS, Sohn YH. Use of the Putamen/Caudate Volume Ratio for Early Differentiation between Parkinsonian Variant of Multiple System Atrophy and Parkinson Disease. J Clin Neurol 2007; 3:79-81. [PMID: 19513295 PMCID: PMC2686861 DOI: 10.3988/jcn.2007.3.2.79] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2006] [Accepted: 05/25/2007] [Indexed: 11/17/2022] Open
Abstract
Background and purpose Neuropathological studies have demonstrated that multiple system atrophy (MSA) produces selective atrophy of the putamen with sparing of the caudate nucleus, while both structures are spared in idiopathic Parkinson's disease (PD). In this study we evaluated the clinical efficacy of using putaminal atrophy in brain MRI to differentiate MSA and PD. Methods We measured the putamen/caudate volume ratio on brain MRI in 24 patients with MSA and 21 patients with PD. Two clinicians who were blinded to the patients' diagnoses and to each other's assessments measured the volume ratio using a computer program. Results The measured volume ratios of the two investigators were highly correlated (r=0.72, p<0.0001). The volume ratio was significantly lower in MSA (1.29±0.28) than PD (1.91±0.29, p<0.0001). Setting an arbitrary cutoff ratio of 1.6 resulted in about 90% of patients with MSA falling into the group with a lower ratio, whereas more than 80% of patients with PD belonged to the other group. Conclusions The present results demonstrate that putaminal atrophy in MSA as measured on brain MRI represents an effective tool for differentiating MSA from PD.
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Affiliation(s)
- Ha Y Shin
- Department of Neurology and Brain Research Institute, Seoul, Korea
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147
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Abstract
Neuropsychologic data suggest an important role for the caudate nucleus (CN) in behavioral impairments in Huntington's disease (HD). These include abnormalities in executive function, egocentric visuospatial representations, communication, and retrieval of declarative memories, changes in personality, and psychiatric disturbances. Animal paradigms of CN lesions support a role for the CN in some of these behaviors. Current theories of basal ganglia function add explanatory value to the role of the CN in these behaviors. A disconnection of the caudate from limbic structures, including the amygdala may account for many nonmotor behaviors observed in HD.
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Affiliation(s)
- D H Jacobs
- Department of Neurology, University of Kansas School of Medicine, Kansas City, Kansas, USA
| | - S J Huber
- Department of Neurology, University of Kansas School of Medicine, Kansas City, Kansas, USA
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