151
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Abusrair AH, Bohlega S, Al-Semari A, Al-Ajlan FS, Al-Ahmadi K, Mohamed B, AlDakheel A. Brain MR Imaging Findings in Woodhouse-Sakati Syndrome. AJNR Am J Neuroradiol 2018; 39:2256-2262. [PMID: 30409855 DOI: 10.3174/ajnr.a5879] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 09/29/2018] [Indexed: 01/14/2023]
Abstract
BACKGROUND AND PURPOSE Woodhouse-Sakati syndrome is a rare autosomal recessive disorder characterized by hypogonadism, alopecia, diabetes mellitus, and progressive extrapyramidal signs. The disease is caused by biallelic pathogenic variants in the DCAF17 gene. The purpose of this study was to describe the spectrum of brain MR imaging abnormalities in Woodhouse-Sakati syndrome. MATERIALS AND METHODS We reviewed brain MR images of 26 patients with a clinical and genetic diagnosis of Woodhouse-Sakati syndrome (12 males, 14 females; age range, 16-45 years; mean age, 26.6 years). Follow-up studies were conducted for 6 patients. RESULTS All patients had abnormal MR imaging findings. The most common abnormalities were a small pituitary gland (76.9%), pronounced basal ganglia iron deposition (73%), and white matter lesions in 69.2%. White matter lesions showed frontoparietal and periventricular predominance. All white matter lesions spared subcortical U-fibers and were nonenhanced. Prominent perivascular spaces (15.3%) and restricted diffusion in the splenium of the corpus callosum (7.6%) were less frequent findings. Follow-up studies showed expansion of white matter lesions with iron deposition further involving the red nucleus and substantia nigra. Older age was associated with a more severe degree of white matter lesions (P < .001). CONCLUSIONS Small pituitary gland, accentuated iron deposition in the globus pallidus, and nonenhancing frontoparietal/periventricular white matter lesions were the most noted abnormalities seen in our cohort. The pattern and extent of these findings were observed to correlate with older age, reflecting a possible progressive myelin destruction and/or axonal loss. The presence of pituitary hypoplasia and white matter lesions can further distinguish Woodhouse-Sakati syndrome from other neurodegenerative diseases with brain iron accumulation subtypes.
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Affiliation(s)
- A H Abusrair
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
| | - S Bohlega
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
| | - A Al-Semari
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
| | - F S Al-Ajlan
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
| | - K Al-Ahmadi
- Radiology (K.A.-A.), King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
| | - B Mohamed
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
| | - A AlDakheel
- From the Departments of Neurosciences (A.H.A., S.B., A.A.-S., F.S.A.-A., B.M., A.A.)
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152
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Sanjari Moghaddam H, Dolatshahi M, Salardini E, Aarabi MH. Association of olfaction dysfunction with brain microstructure in prodromal Parkinson disease. Neurol Sci 2018; 40:283-291. [DOI: 10.1007/s10072-018-3629-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/26/2018] [Indexed: 01/07/2023]
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153
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Zhang Y, Yan F, Wang L, Wang Y, Wang C, Wang Q, Huang L. Cortical Areas Associated With Mismatch Negativity: A Connectivity Study Using Propofol Anesthesia. Front Hum Neurosci 2018; 12:392. [PMID: 30333738 PMCID: PMC6176496 DOI: 10.3389/fnhum.2018.00392] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Accepted: 09/10/2018] [Indexed: 02/04/2023] Open
Abstract
Auditory mismatch negativity (MMN) is an event-related potential (ERP) waveform induced by rare deviant stimuli that occur in a stream of regular auditory stimuli. The generators of MMN are believed to include several different cortical regions like the bilateral temporal and the right inferior frontal gyrus (IFG). However, exact cortical regions associated with MMN remain controversial. In this study, we compared the number of long-distance connections induced by the standard and deviant stimuli during awake state and propofol anesthesia state to identify the cortical areas associated with the generation of MMN. In awake state, we find that deviant stimuli synchronize more information between the right frontal and temporal than standard stimuli. Moreover, we find that the deviant stimuli in awake state activate the bilateral frontal, central areas, the left temporal and parietal areas as compared to the anesthesia state, whereas the standard stimuli do not. These results suggest that, in addition to the bilateral temporal and the right IFG, the bilateral frontal and centro-parietal regions also contribute to the generation of MMN.
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Affiliation(s)
- Yun Zhang
- School of Life Science and Technology, Xidian University, Xi'an, China
| | - Fei Yan
- Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Liu Wang
- School of Life Science and Technology, Xidian University, Xi'an, China
| | - Yubo Wang
- School of Life Science and Technology, Xidian University, Xi'an, China
| | - Chunshu Wang
- Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Qiang Wang
- Department of Anesthesiology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Liyu Huang
- School of Life Science and Technology, Xidian University, Xi'an, China
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154
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Ayhan F, Perez BA, Shorrock HK, Zu T, Banez-Coronel M, Reid T, Furuya H, Clark HB, Troncoso JC, Ross CA, Subramony SH, Ashizawa T, Wang ET, Yachnis AT, Ranum LP. SCA8 RAN polySer protein preferentially accumulates in white matter regions and is regulated by eIF3F. EMBO J 2018; 37:embj.201899023. [PMID: 30206144 DOI: 10.15252/embj.201899023] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 07/31/2018] [Accepted: 08/02/2018] [Indexed: 12/12/2022] Open
Abstract
Spinocerebellar ataxia type 8 (SCA8) is caused by a bidirectionally transcribed CTG·CAG expansion that results in the in vivo accumulation of CUG RNA foci, an ATG-initiated polyGln and a polyAla protein expressed by repeat-associated non-ATG (RAN) translation. Although RAN proteins have been reported in a growing number of diseases, the mechanisms and role of RAN translation in disease are poorly understood. We report a novel toxic SCA8 polySer protein which accumulates in white matter (WM) regions as aggregates that increase with age and disease severity. WM regions with polySer aggregates show demyelination and axonal degeneration in SCA8 human and mouse brains. Additionally, knockdown of the eukaryotic translation initiation factor eIF3F in cells reduces steady-state levels of SCA8 polySer and other RAN proteins. Taken together, these data show polySer and WM abnormalities contribute to SCA8 and identify eIF3F as a novel modulator of RAN protein accumulation.
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Affiliation(s)
- Fatma Ayhan
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Barbara A Perez
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Hannah K Shorrock
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Tao Zu
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Monica Banez-Coronel
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Tammy Reid
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Hirokazu Furuya
- Department of Neurology, Kochi Medical School, Kochi University, Kochi, Japan.,Department of Neurology, Neuro-Muscular Center, NHO Omuta Hospital, Fukuoka, Japan
| | - H Brent Clark
- Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Juan C Troncoso
- Department of Pathology and Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Christopher A Ross
- Department of Psychiatry, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Pharmacology, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Huntington's Disease Center, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - S H Subramony
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Tetsuo Ashizawa
- Department of Neurology, Houston Methodist Hospital, Houston, TX, USA
| | - Eric T Wang
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Anthony T Yachnis
- Department of Pathology, Immunology and Laboratory Medicine, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Laura Pw Ranum
- Center for NeuroGenetics, College of Medicine, University of Florida, Gainesville, FL, USA .,Department of Molecular Genetics and Microbiology, College of Medicine, University of Florida, Gainesville, FL, USA.,Department of Neurology, College of Medicine, University of Florida, Gainesville, FL, USA.,Genetics Institute, University of Florida, Gainesville, FL, USA
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155
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Filley CM, Kelly JP. White Matter and Cognition in Traumatic Brain Injury. J Alzheimers Dis 2018; 65:345-362. [DOI: 10.3233/jad-180287] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Christopher M. Filley
- Behavioral Neurology Section, University of Colorado School of Medicine, Aurora, CO, USA
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA
- Department of Psychiatry, University of Colorado School of Medicine, Aurora, CO, USA
- Marcus Institute for Brain Health, University of Colorado School of Medicine, Aurora, CO, USA
| | - James P. Kelly
- Behavioral Neurology Section, University of Colorado School of Medicine, Aurora, CO, USA
- Department of Neurology, University of Colorado School of Medicine, Aurora, CO, USA
- Marcus Institute for Brain Health, University of Colorado School of Medicine, Aurora, CO, USA
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156
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PLP1 and CNTN1 gene variation modulates the microstructure of human white matter in the corpus callosum. Brain Struct Funct 2018; 223:3875-3887. [DOI: 10.1007/s00429-018-1729-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 08/03/2018] [Indexed: 12/27/2022]
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157
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Bhatia K, Henderson L, Yim M, Hsu E, Dhaliwal R. Diffusion Tensor Imaging Investigation of Uncinate Fasciculus Anatomy in Healthy Controls: Description of a Subgenual Stem. Neuropsychobiology 2018; 75:132-140. [PMID: 29332063 DOI: 10.1159/000485111] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 11/08/2017] [Indexed: 11/19/2022]
Abstract
The uncinate fasciculus is the largest white matter association tract connecting the prefrontal cortex and the anteromedial temporal lobe. The traditional anatomical description outlines a temporal stem that hooks around the posterior insula, a subinsular body, and 2 prefrontal stems extending to the lateral orbital gyri and the frontopolar cortex. Recent imaging studies of the white matter tracts deep to the subgenual cingulate gyrus (Brodmann area 25: BA25) suggest the presence of white matter fibers extending from BA25 to the amygdala, via a route that would run in close proximity to the uncinate fasciculus, that are of functional importance in mood disorders. We hypothesized that these fibers represent a third, medial prefrontal stem of the uncinate fasciculus. Using diffusion tensor imaging in 74 healthy volunteer humans, we seeded the uncinate fasciculus using 2 regions of interest centered over the temporal stem and the caudal body of the uncinate fasciculus in the coronal plane at the level of the anterior commissure. A medial prefrontal stem extending to the subgenual cingulate gyrus was demonstrated in 65/74 left and 70/74 right cerebral hemispheres, and had a mean fractional anisotropy value of 0.43 (95% CI 0.40-0.47). The medial subgenual stem fibers were inseparable from the caudal body and temporal stem of the main uncinate fasciculus and followed the same hook-shaped morphology. A probable medial subgenual prefrontal stem of the uncinate fasciculus was demonstrated in a cohort of healthy volunteers and is of potential significance in our understanding of neuropsychiatry and mood disorders.
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Affiliation(s)
- Kartik Bhatia
- Medical Imaging, St. Vincent's Hospital, Darlinghurst, New South Wales, Australia
| | - Luke Henderson
- Department of Anatomy, University of Sydney, Camperdown, New South Wales, Australia
| | - Mark Yim
- Department of Psychiatry (Adolescent Unit), St. Vincent's Clinic, Darlinghurst, New South Wales, Australia
| | - Eugene Hsu
- Medical Imaging, St. Vincent's Hospital, Darlinghurst, New South Wales, Australia
| | - Rajiv Dhaliwal
- Department of Surgery, University of Sydney, Camperdown, New South Wales, Australia
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158
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Girls' pubertal development is associated with white matter microstructure in late adolescence. Neuroimage 2018; 181:659-669. [PMID: 30056197 DOI: 10.1016/j.neuroimage.2018.07.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 07/18/2018] [Accepted: 07/20/2018] [Indexed: 01/04/2023] Open
Abstract
Patterns of pubertal maturation have been linked to vulnerability for emotion dysregulation disorders in girls, as well as white matter (WM) development, suggestive of a potential mechanism between pubertal maturation and emotional health. Because pubertal processes begin at varying ages (i.e., status, timing) and proceed at varying rates (i.e., tempo), identifying individual differences in the pubertal course associated with subsequent WM microstructure development may reveal clues about neurobiological mechanisms of girls' emotional well-being. In a prospective cohort study of 107 girls, we examined associations between pubertal status at age 9, pubertal timing and tempo from ages 9-15, and WM microstructure at age 19. Tract-based spatial statistics revealed that girls with more advanced pubertal status at age 9, specific to gonadal-related physical changes, had higher fractional anisotropy, and lower mean diffusivity (MD) and radial diffusivity in tracts relevant to cognitive control and emotion regulation (e.g., the superior longitudinal fasciculus, external capsule, and uncinate fasciculus). Additionally, girls with earlier pubertal timing showed lower MD in the left anterior cingulum bundle. Tempo was unrelated to WM measures. These findings implicate specific aspects of pubertal maturation in subsequent neural signatures, suggesting possible neuroendocrine mechanisms relevant to emotional development. Future work incorporating longitudinal neuroimaging in parallel with pubertal measures may contribute to the understanding of individual variation in pubertal course and WM development.
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159
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Cacciaglia R, Molinuevo JL, Sánchez-Benavides G, Falcón C, Gramunt N, Brugulat-Serrat A, Grau O, Gispert JD. Episodic memory and executive functions in cognitively healthy individuals display distinct neuroanatomical correlates which are differentially modulated by aging. Hum Brain Mapp 2018; 39:4565-4579. [PMID: 29972619 PMCID: PMC6220988 DOI: 10.1002/hbm.24306] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 06/22/2018] [Accepted: 06/25/2018] [Indexed: 11/21/2022] Open
Abstract
The neuroanatomical bases of episodic memory (EM) and executive functions (EFs) have been widely addressed in patients with brain damage and in individuals with neurologic disorders. These studies reported that larger brain structures support better outcomes in both cognitive domains, thereby supporting the “bigger is better” account. However, relatively few studies have explored the cerebral morphological properties underlying EM and EFs in cognitively healthy individuals and current findings indicate no unitary theoretical explanation for the structure–function relationship. Moreover, existing studies have typically restricted the analyses to a priori defined regions of interest. Here we conducted unbiased voxel‐wise analysis of the associations between regional gray as well as white matter volumes (GMv; WMv) and performance in both cognitive domains in a sample of 463 cognitively intact individuals. We found that efficiency in EM was predicted by lower GMv in brain areas belonging to the default‐mode network (DMN). By contrast, EFs performance was predicted by larger GMv in a distributed set of regions, which overlapped with the executive control network (ECN). Volume of white matter bundles supporting both cross‐cortical and interhemispheric connections was positively related to processing speed. Furthermore, aging modulated the relationship between regional volumes and cognitive performance in several areas including the hippocampus and frontal cortex. Our data extend the critical role of the DMN and ECN by showing that variability in their morphological properties, and not only their activation patterns, affects EM and EFs, respectively. Moreover, our finding that aging reverts these associations supports previously advanced theories of cognitive neurodevelopment.
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Affiliation(s)
- Raffaele Cacciaglia
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - José Luis Molinuevo
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | | | - Carles Falcón
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain
| | - Nina Gramunt
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,CIBER Fragilidad y Envejecimiento Saludable (CIBERFES), Madrid, Spain
| | - Anna Brugulat-Serrat
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Oriol Grau
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
| | - Juan Domingo Gispert
- Barcelonaβeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain.,Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Madrid, Spain.,Universitat Pompeu Fabra, Barcelona, Spain
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160
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Zhao Y, Guo S, Luo M, Shi X, Bilello M, Zhang S, Li C. A level set method for multiple sclerosis lesion segmentation. Magn Reson Imaging 2018; 49:94-100. [DOI: 10.1016/j.mri.2017.03.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 03/04/2017] [Accepted: 03/08/2017] [Indexed: 11/17/2022]
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161
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Axonal chronic injury in treatment-naïve HIV+ adults with asymptomatic neurocognitive impairment and its relationship with clinical variables and cognitive status. BMC Neurol 2018; 18:66. [PMID: 29747571 PMCID: PMC5943991 DOI: 10.1186/s12883-018-1069-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Accepted: 05/02/2018] [Indexed: 12/18/2022] Open
Abstract
Background HIV is a neurotropic virus, and it can bring about neurodegeneration and may even result in cognitive impairments. The precise mechanism of HIV-associated white matter (WM) injury is unknown. The effects of multiple clinical contributors on WM impairments and the relationship between the WM alterations and cognitive performance merit further investigation. Methods Diffusion tensor imaging (DTI) was performed in 20 antiretroviral-naïve HIV-positive asymptomatic neurocognitive impairment (ANI) adults and 20 healthy volunteers. Whole-brain analysis of DTI metrics between groups was conducted by employing tract-based spatial statistics (TBSS), including fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD) and radial diffusivity (RD). DTI parameters were correlated with clinical variables (age, CD4+ cell count, CD4+/CD8+ ratio, plasma viral load and duration of HIV infection) and multiple cognitive tests by using multilinear regression analyses. Results DTI quantified diffusion alterations in the corpus callosum and corona radiata (MD increased significantly, P < 0.05) and chronic axonal injury in the corpus callosum, corona radiata, internal capsule, external capsule, posterior thalamic radiation, sagittal stratum, and superior longitudinal fasciculus (AD increased significantly, P < 0.05). The impairments in the corona radiata had significant correlations with the current CD4+/CD8+ ratios. Increased MD or AD values in multiple white matter structures showed significant associations with many cognitive domain tests. Conclusions WM impairments are present in neurologically asymptomatic HIV+ adults, periventricular WM (corpus callosum and corona radiata) are preferential occult injuries, which is associated with axonal chronic damage rather than demyelination. Axonopathy may exist before myelin injury. DTI-TBSS is helpful to explore the WM microstructure abnormalities and provide a new perspective for the investigation of the pathomechanism of HIV-associated WM injury.
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162
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Oh SW, Shin NY, Choi JY, Lee SK, Bang MR. Altered White Matter Integrity in Human Immunodeficiency Virus-Associated Neurocognitive Disorder: A Tract-Based Spatial Statistics Study. Korean J Radiol 2018; 19:431-442. [PMID: 29713221 PMCID: PMC5904470 DOI: 10.3348/kjr.2018.19.3.431] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Accepted: 09/28/2017] [Indexed: 01/26/2023] Open
Abstract
Objective Human immunodeficiency virus (HIV) infection has been known to damage the microstructural integrity of white matter (WM). However, only a few studies have assessed the brain regions in HIV-associated neurocognitive disorders (HAND) with diffusion tensor imaging (DTI). Therefore, we sought to compare the DTI data between HIV patients with and without HAND using tract-based spatial statistics (TBSS). Materials and Methods Twenty-two HIV-infected patients (10 with HAND and 12 without HAND) and 11 healthy controls (HC) were enrolled in this study. A whole-brain analysis of fractional anisotropy (FA), mean diffusivity (MD), radial diffusivity (RD), and axial diffusivity was performed with TBSS and a subsequent 20 tract-specific region-of-interest (ROI)-based analysis to localize and compare altered WM integrity in all group contrasts. Results Compared with HC, patients with HAND showed decreased FA in the right frontoparietal WM including the upper corticospinal tract (CST) and increased MD and RD in the bilateral frontoparietal WM, corpus callosum, bilateral CSTs and bilateral cerebellar peduncles. The DTI values did not significantly differ between HIV patients with and without HAND or between HIV patients without HAND and HC. In the ROI-based analysis, decreased FA was observed in the right superior longitudinal fasciculus and was significantly correlated with decreased information processing speed, memory, executive function, and fine motor function in HIV patients. Conclusion These results suggest that altered integrity of the frontoparietal WM contributes to cognitive dysfunction in HIV patients.
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Affiliation(s)
- Se Won Oh
- Department of Radiology, Soonchunhyang University Cheonan Hospital, Cheonan 31151, Korea
| | - Na-Young Shin
- Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
| | - Jun Yong Choi
- Department of Internal Medicine and AIDS Research Institute, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Seung-Koo Lee
- Department of Radiology, Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Mi Rim Bang
- Department of Radiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea
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163
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Kamali A, Riascos RF, Pillai JJ, Sair HI, Patel R, Nelson FM, Lincoln JA, Tandon N, Mirbagheri S, Rabiei P, Keser Z, Hasan KM. Mapping the trajectory of the amygdalothalamic tract in the human brain. J Neurosci Res 2018; 96:1176-1185. [PMID: 29607550 DOI: 10.1002/jnr.24235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 03/01/2018] [Accepted: 03/02/2018] [Indexed: 11/11/2022]
Abstract
Although the thalamus is not considered primarily as a limbic structure, abundant evidence indicates the essential role of the thalamus as a modulator of limbic functions indirectly through the amygdala. The amygdala is a central component of the limbic system and serves an essential role in modulating the core processes including the memory, decision-making, and emotional reactions. The amygdalothalamic pathway is the largest direct amygdalo-diencephalic connection in the primates including the human brain. Given the crucial role of the amygdalothalamic tract (ATT) in memory function and diencephalic amnesia in stroke patients, diffusion tensor imaging may be helpful in better visualizing the surgical anatomy of this pathway noninvasively. To date, few diffusion-weighted studies have focused on the amygdala, yet the fine neuronal connection of the amygdala and thalamus known as the ATT has yet to be elucidated. This study aimed to investigate the utility of high spatial resolution diffusion tensor tractography for mapping the trajectory of the ATT in the human brain. We studied 15 healthy right-handed human subjects (12 men and 3 women with age range of 24-37 years old). Using a high-resolution diffusion tensor tractography technique, for the first time, we were able to reconstruct and measure the trajectory of the ATT. We further revealed the close relationship of the ATT with the temporopontine tract and the fornix bilaterally in 15 healthy adult human brains.
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Affiliation(s)
- Arash Kamali
- Departments of Diagnostic Radiology, University of Texas at Houston, Houston, Texas, USA
| | - Roy F Riascos
- Departments of Diagnostic Radiology, University of Texas at Houston, Houston, Texas, USA
| | - Jay J Pillai
- Department of Diagnostic Radiology, Division of Neuroradiology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Haris I Sair
- Department of Diagnostic Radiology, Division of Neuroradiology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Rajan Patel
- Departments of Diagnostic Radiology, University of Texas at Houston, Houston, Texas, USA
| | - Flavia M Nelson
- Department of Neurology, University of Texas at Houston, Houston, Texas, USA
| | - John A Lincoln
- Department of Neurology, University of Texas at Houston, Houston, Texas, USA
| | - Nitin Tandon
- Department of Neurosurgery, University of Texas at Houston, Houston, Texas, USA
| | - Saeedeh Mirbagheri
- Department of Diagnostic Radiology, Mount Saini Beth Israel, New York, New York, USA
| | - Pejman Rabiei
- Departments of Diagnostic Radiology, University of Texas at Houston, Houston, Texas, USA
| | - Zafer Keser
- Department of Neurology, University of Texas at Houston, Houston, Texas, USA
| | - Khader M Hasan
- Departments of Diagnostic Radiology, University of Texas at Houston, Houston, Texas, USA
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164
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Diffusion tensor tractography of the mammillothalamic tract in the human brain using a high spatial resolution DTI technique. Sci Rep 2018; 8:5229. [PMID: 29588461 PMCID: PMC5869722 DOI: 10.1038/s41598-018-23452-w] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 02/19/2018] [Indexed: 02/07/2023] Open
Abstract
The mammillary bodies as part of the hypothalamic nuclei are in the central limbic circuitry of the human brain. The mammillary bodies are shown to be directly or indirectly connected to the amygdala, hippocampus, and thalami as the major gray matter structures of the human limbic system. Although it is not primarily considered as part of the human limbic system, the thalamus is shown to be involved in many limbic functions of the human brain. The major direct connection of the thalami with the hypothalamic nuclei is known to be through the mammillothalamic tract. Given the crucial role of the mammillothalamic tracts in memory functions, diffusion tensor imaging may be helpful in better visualizing the surgical anatomy of this pathway noninvasively. This study aimed to investigate the utility of high spatial resolution diffusion tensor tractography for mapping the trajectory of the mammillothalamic tract in the human brain. Fifteen healthy adults were studied after obtaining written informed consent. We used high spatial resolution diffusion tensor imaging data at 3.0 T. We delineated, for the first time, the detailed trajectory of the mammillothalamic tract of the human brain using deterministic diffusion tensor tractography.
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165
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Xu J, McClintock CH, Balodis IM, Miller L, Potenza MN. Openness to Changing Religious Views Is Related to Radial Diffusivity in the Genu of the Corpus Callosum in an Initial Study of Healthy Young Adults. Front Psychol 2018; 9:330. [PMID: 29636711 PMCID: PMC5881099 DOI: 10.3389/fpsyg.2018.00330] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 02/27/2018] [Indexed: 11/13/2022] Open
Abstract
A quest orientation to religion is characterized by a search for answers to complex existential questions, a perception of religious doubt as positive, and an openness to change one's religious views as one grows and changes. This orientation is inversely related to fundamentalism, authoritarianism, and prejudice and directly related to cognitive complexity, openness to experience, and prosociality. To date, the neural correlates of religious quest have not been investigated. This study assessed the relationships between measures linked to white-matter integrity and quest religious orientation among 24 healthy participants using diffusion tensor imaging (DTI) and the quest scale. A tract-based spatial statistical analysis whole-brain-corrected initially employing an accepted threshold (pTFCE < 0.05) and then applying a Bonferroni correction (pTFCE < 0.0042) identified a region of the genu of the corpus callosum as showing radial diffusivity measures being related to openness to change religious beliefs. When not employing a Bonferroni correction (pTFCE < 0.05), the openness-to-change subscale of the quest scale negatively correlated with radial diffusivity and mean diffusivity measures in extensive white-matter regions in both hemispheres that include the corpus callosum body, genu, and splenium, superior longitudinal fasciculus, forceps minor, external capsule, and inferior fronto-occipital fasciculus. No relationships were found with the other subscales. These findings suggest that a greater openness to change one's religious views is associated with better white-matter integrity specifically in the genu of the corpus callosum and likely in a more extensive set of white-matter structures interconnecting widespread cortical and subcortical regions in the brain across hemispheres. They, furthermore, suggest structural similarities that may link this tendency to associated positive psychological traits, including creative cognition and post-traumatic growth.
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Affiliation(s)
- Jiansong Xu
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, United States
| | - Clayton H. McClintock
- Spirituality Mind Body Institute, Department of Counseling and Clinical Psychology, Teachers College, Columbia University, New York City, NY, United States
| | - Iris M. Balodis
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, United States
- Peter Boris Centre for Addictions Research, Department of Psychiatry and Behavioural Neurosciences, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
| | - Lisa Miller
- Spirituality Mind Body Institute, Department of Counseling and Clinical Psychology, Teachers College, Columbia University, New York City, NY, United States
| | - Marc N. Potenza
- Department of Psychiatry, Yale School of Medicine, Yale University, New Haven, CT, United States
- Child Study Center, Yale School of Medicine, Yale University, New Haven, CT, United States
- Department of Neurobiology, Yale School of Medicine, Yale University, New Haven, CT, United States
- Connecticut Mental Health Center, New Haven, CT, United States
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166
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Lee TW, Xue SW. Revisiting the Functional and Structural Connectivity of Large-Scale Cortical Networks. Brain Connect 2018; 8:129-138. [PMID: 29291634 DOI: 10.1089/brain.2017.0536] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Multimodal neuroimaging research has become increasingly popular, and structure-function correspondence is tacitly assumed. Researchers have not yet adequately assessed whether the functional connectivity (FC) and structural connectivity (SC) of large-scale cortical networks are in agreement. Structural magnetic resonance imaging (sMRI), resting-state functional MRI (rfMRI), and diffusion-weighted imaging (DWI) data sets from 36 healthy subjects (age 27.4) were selected from a Rockland sample (Enhanced Nathan Kline Institute). The cerebral cortex was parcellated into 62 regions according to the Desikan-Killiany atlas for FC and SC analyses. Thresholded correlations in rfMRI and tractography derived from DWI were used to construct FC and SC maps, respectively. A community detection algorithm was applied to reveal the underlying organization, and modular consistency was quantified to bridge cross-modal comparisons. The distributions of correlation coefficients in FC and SC maps were significantly different. Approximately one-fourth of the connections in the SC map were located at a correlation level below 0.2 (df 253). The index of modular consistency in the within-modality interindividual condition (either FC or SC) was considerably greater than that in the between-modality intraindividual analog. In addition, the SC-FC differential map (SC connections with lower correlations) revealed reliable modular structures. Based on these results, the hypothesized FC-SC agreement is partially valid. Contingent on extant neuroimaging tools and analytical conventions, the neural informatics of FC and SC should be regarded as complementary rather than concordant. Furthermore, the results verify the physiological significance of moderately (or mildly) correlated brain signals in rfMRI, which are often discarded by stringent thresholding.
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Affiliation(s)
- Tien-Wen Lee
- 1 Center for Cognition and Brain Disorders, Hangzhou Normal University , Hangzhou, China .,2 Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments , Hangzhou, China .,3 Department of Psychiatry, Dajia Lee's General Hospital , Lee's Medical Corporation, Taichung, Taiwan
| | - Shao-Wei Xue
- 1 Center for Cognition and Brain Disorders, Hangzhou Normal University , Hangzhou, China .,2 Zhejiang Key Laboratory for Research in Assessment of Cognitive Impairments , Hangzhou, China
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167
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Ye Q, Bai F. Contribution of diffusion, perfusion and functional MRI to the disconnection hypothesis in subcortical vascular cognitive impairment. Stroke Vasc Neurol 2018; 3:131-139. [PMID: 30294468 PMCID: PMC6169607 DOI: 10.1136/svn-2017-000080] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 01/26/2018] [Accepted: 02/14/2018] [Indexed: 11/29/2022] Open
Abstract
Vascular cognitive impairment (VCI) describes all forms of cognitive impairment caused by any type of cerebrovascular disease. Early identification of VCI is quite difficult due to the lack of both sensitive and specific biomarkers. Extensive damage to the white matter tracts, which connect the cortical and subcortical regions, has been shown in subcortical VCI (SVCI), the most common subtype of VCI that is caused by small vessel disease. Two specific MRI sequences, including diffusion tensor imaging (DTI) and functional MRI (fMRI), have emerged as useful tools for identifying subtle white matter changes and the intrinsic connectivity between distinct cortical regions. This review describes the advantages of these two modalities in SVCI research and the current DTI and fMRI findings on SVCI. Using DTI technique, a variety of studies found that white matter microstructural damages in the anterior and superior areas are more specific to SVCI. Similarly, functional brain abnormalities detected by fMRI have also been mainly shown in anterior brain areas in SVCI. The characteristic distribution of brain abnormalities in SVCI interrupts the prefrontal-subcortical loop that results in cognitive impairments in particular domains, which further confirms the ‘disconnection syndrome’ hypothesis. In addition, another MRI technique, arterial spin labelling (ASL), has been used to describe the disconnection patterns in a variety of conditions by measuring cerebral blood flow. The role of the ASL technique in SVCI research is also assessed. Finally, the review proposes the application of multimodality fusion in the investigation of SVCI pathogenesis.
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Affiliation(s)
- Qing Ye
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China.,Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China.,Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, China
| | - Feng Bai
- Department of Neurology, Affiliated Drum Tower Hospital, Nanjing University Medical School, Nanjing, Jiangsu, China.,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China.,Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China.,Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, China
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168
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Kang H, Zhang M, Ouyang M, Guo R, Yu Q, Peng Q, Zhang N, Zhang Y, Duan Y, Tang X, Mishra V, Fang F, Li W, Huang H, Peng Y. Brain white matter microstructural alterations in children of type I Gaucher disease characterized with diffusion tensor MR imaging. Eur J Radiol 2018; 102:22-29. [PMID: 29685539 DOI: 10.1016/j.ejrad.2018.02.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 01/07/2018] [Accepted: 02/11/2018] [Indexed: 10/18/2022]
Abstract
OBJECTIVES To investigate white matter (WM) microstructural alterations in type I Gaucher disease (type I GD) pediatric patients and explore the correlation between the disease duration and WM changes. METHODS Twenty-two GD patients and twenty-two sex- and age-matched typical development (TD) children were recruited. Changes in WM were investigated using diffusion tensor imaging (DTI) and applying atlas-based tract analysis. For all DTI measurements, independent-samples t-test was applied to report significant differences between type I GD and TD. Partial correlation was applied to determine whether the disease duration was correlated with DTI measurements. RESULTS Bidirectional fractional anisotropy (FA) changes were found in the bilateral superior cerebellar peduncle, right posterior limb of the internal capsule, right posterior corona radiata, and right posterior thalamic radiation (p < 0.05). Higher mean diffusivity (MD)was found in the right superior corona radiata, middle cerebellar peduncle, right posterior thalamic radiation and right superior longitudinal fasciculus (p < 0.05) in type I GD. And higher radial diffusivity (RD) was also found in the left superior cerebellar peduncle (p < 0.05) in type I GD. The disease duration of type I GD patients is positively correlated with axial diffusivity and MD in multiple major WM tracts. CONCLUSION DTI findings supported the microstructural alterations of multiple WM tracts in type I GD patients.
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Affiliation(s)
- Huiying Kang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, Beijing, National Center for Children's Health, China; Department of Radiology, Children's Hospital of Philadelphia, PA, United States
| | - Miao Zhang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, Beijing, National Center for Children's Health, China
| | - Minhui Ouyang
- Department of Radiology, Children's Hospital of Philadelphia, PA, United States
| | - Ruolan Guo
- Center for Medical Genetics, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China,; MOE Key Laboratory of Major Diseases in Children, China; Beijing Key Laboratory for Genetics of Birth Defects, China
| | - Qinlin Yu
- Department of Radiology, Children's Hospital of Philadelphia, PA, United States; Peking University, School of Psychological and Cognitive Sciences, Beijing, China; Peking University, Peking-Tsinghua Center for Life Sciences, Beijing, China
| | - Qinmu Peng
- Department of Radiology, Children's Hospital of Philadelphia, PA, United States
| | - Ningning Zhang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, Beijing, National Center for Children's Health, China
| | - Yonghong Zhang
- Hematology Oncology Center Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Yanlong Duan
- Hematology Oncology Center Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Xiaolu Tang
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, Beijing, National Center for Children's Health, China
| | - Virendra Mishra
- Cleveland Clinic Lou Ruvo Center for Brain Health, Las Vegas, NV, United States
| | - Fang Fang
- Peking University, School of Psychological and Cognitive Sciences, Beijing, China; Peking University, Peking-Tsinghua Center for Life Sciences, Beijing, China
| | - Wei Li
- Center for Medical Genetics, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China,; MOE Key Laboratory of Major Diseases in Children, China; Beijing Key Laboratory for Genetics of Birth Defects, China
| | - Hao Huang
- Department of Radiology, Children's Hospital of Philadelphia, PA, United States; Department of Radiology, Perelman School of Medicine, University of Pennsylvania, PA, United States
| | - Yun Peng
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, Beijing, National Center for Children's Health, China.
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169
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Abstract
The leukodystrophies are a group of inherited white matter disorders with a heterogeneous genetic background, considerable phenotypic variability and disease onset at all ages. This Review focuses on leukodystrophies with major prevalence or primary onset in adulthood. We summarize 20 leukodystrophies with adult presentations, providing information on the underlying genetic mutations and on biochemical assays that aid diagnosis, where available. Definitions, clinical characteristics, age of onset, MRI findings and treatment options are all described, providing a comprehensive overview of the current knowledge of the various adulthood leukodystrophies. We highlight the distinction between adult-onset leukodystrophies and other inherited disorders with white matter involvement, and we propose a diagnostic pathway for timely recognition of adulthood leukodystrophies in a routine clinical setting. In addition, we provide detailed clinical information on selected adult-onset leukodystrophies, including X-linked adrenoleukodystrophy, metachromatic leukodystrophy, cerebrotendinous xanthomatosis, hereditary diffuse leukoencephalopathy with axonal spheroids, autosomal dominant adult-onset demyelinating leukodystrophy, adult polyglucosan body disease, and leukoencephalopathy with vanishing white matter. Ultimately, this Review aims to provide helpful suggestions to identify treatable adulthood leukodystrophies at an early stage in the disease course.
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Affiliation(s)
- Wolfgang Köhler
- Department of Neurology, University Hospital Leipzig, Liebigstrasse 20, 04103 Leipzig, Germany
| | - Julian Curiel
- Division of Neurology, Children's Hospital of Philadelphia, Abramson Research Center, 3615 Civic Center Boulevard, Philadelphia, Pennsylvania 19104, USA
| | - Adeline Vanderver
- Division of Neurology, Children's Hospital of Philadelphia, Abramson Research Center, 3615 Civic Center Boulevard, Philadelphia, Pennsylvania 19104, USA
- Perelman School of Medicine, University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, Pennsylvania 19104, USA
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170
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Gupta A, Woodworth DC, Ellingson BM, Rapkin AJ, Naliboff B, Kilpatrick LA, Stains J, Masghati S, Tillisch K, Mayer EA, Labus JS. Disease-Related Microstructural Differences in the Brain in Women With Provoked Vestibulodynia. THE JOURNAL OF PAIN 2018; 19:528.e1-528.e15. [PMID: 29391213 DOI: 10.1016/j.jpain.2017.12.269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/06/2017] [Accepted: 12/17/2017] [Indexed: 12/13/2022]
Abstract
Provoked vestibulodynia (PVD) is a chronic pelvic pain disorder affecting 16% of the female population. Neuroimaging studies have highlighted central abnormalities in PVD, similar to other chronic pelvic pain disorders, including brain regions involved in sensory processing and modulation of pain. The aim of the study was to determine alterations in the subvoxel, microstructural organization within tissues in PVD compared with healthy control participants (HCs) and a disease control group (irritable bowel syndrome [IBS]). Diffusion tensor imaging magnetic resonance imaging was conducted in 87 age-matched premenopausal women (29 PVD, 29 HCs, 29 IBS). Statistical parameter mapping of fractional anisotropy (FA) and mean diffusivity (MD) maps were used to identify microstructural difference in the brain specific to PVD or shared with IBS. PVD alterations in microstructural organization of the brain were predominantly observed in fibers associated with sensorimotor integration and pain processing that relay information between the thalamus, basal ganglia, sensorimotor, and insular cortex. PVD, compared with HCs, showed extensive increases in the FA of somatosensory and basal ganglia regions. In contrast, PVD and IBS subjects did not show any FA-related group differences. PVD subjects showed greater MD in the basal ganglia compared with HCs (higher MD in the internal capsule and pallidum) and IBS (higher MD in the putamen and pallidum). Increases in MD were associated with increased vaginal muscle tenderness and vulvar pain. The current findings highlight possible shared mechanisms between 2 different pelvic pain disorders, but also highlight the widespread alterations observed specifically in PVD compared with HCs. PERSPECTIVE Alterations in microstructure in PVD were observed in fibers associated with sensorimotor integration and pain processing, which were also associated with increased vaginal muscle tenderness and vulvar pain. These alterations may be contributing to increased pain sensitivity and tenderness, highlighting the need for new therapies targeting the central nervous system.
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Affiliation(s)
- Arpana Gupta
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Davis C Woodworth
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Benjamin M Ellingson
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Department of Radiology at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Andrea J Rapkin
- Department of Obstetrics and Gynecology at UCLA, Los Angeles, California
| | - Bruce Naliboff
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Lisa A Kilpatrick
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jean Stains
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California
| | - Salome Masghati
- Department of Obstetrics and Gynecology at UCLA, Los Angeles, California
| | - Kirsten Tillisch
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Emeran A Mayer
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jennifer S Labus
- G. Oppenheimer Center for Neurobiology of Stress and Resilience at UCLA, Los Angeles, California; Vatche and Tamar Manoukian Division of Digestive Diseases at UCLA, Los Angeles, California; David Geffen School of Medicine at UCLA, Los Angeles, California.
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171
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Jackson J, Bianco G, Rosa AO, Cowan K, Bond P, Anichtchik O, Fern R. White matter tauopathy: Transient functional loss and novel myelin remodeling. Glia 2018; 66:813-827. [PMID: 29315804 DOI: 10.1002/glia.23286] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 12/08/2017] [Accepted: 12/11/2017] [Indexed: 01/03/2023]
Abstract
Early white matter (WM) changes are common in dementia and may contribute to functional decline. We here examine this phenomenon in an induced dementia model for the first time. We report a novel and selective form of myelin injury as the first manifestation of tauopathy in the adult central nervous system. Myelin pathology rapidly followed the induction of a P301 tau mutation associated with fronto-temporal dementia in humans (rTG4510 line). Damage involved focal disruption of the ad-axonal myelin lamella and internal oligodendrocyte tongue process, followed by myelin remodeling with features of re-myelination that included myelin thinning and internodal shortening. The evolution of the re-myelinated phenotype was complete in the molecular layer of the dentate gyrus after 1 month and in the optic nerve (ON) after 9 months of transgene induction and proceeded in the absence of actual demyelination, reactive glial changes or inflammatory response. The initial rapid myelin pathology was associated with loss of WM function and performance decline in a novel recognition test and both these effects largely reversed during the myelin re-modeling phase. The initial phase of myelin injury was accompanied by disruption of the vesicle population present in the axoplasm of hippocampal and ON axons. Axoplasmic vesicle release is significant for the regulation of myelin plasticity and disruption of this pathway may underlie the myelin damage and remodeling evoked by tauopathy. WM dysfunction early in tauopathy will disorder neural circuits, the current findings suggest this event may make a significant contribution to early clinical deficit in dementia.
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Affiliation(s)
| | | | - Angelo O Rosa
- Plymouth Electron Microscopy Centre, University of Plymouth, Plymouth, United Kingdom
| | - Katrina Cowan
- Peninsula School of Medicine and Dentistry, University of Plymouth, PUPSMD, Plymouth, United Kingdom
| | - Peter Bond
- Plymouth Electron Microscopy Centre, University of Plymouth, Plymouth, United Kingdom
| | - Oleg Anichtchik
- Peninsula School of Medicine and Dentistry, University of Plymouth, PUPSMD, Plymouth, United Kingdom
| | - Robert Fern
- Peninsula School of Medicine and Dentistry, University of Plymouth, PUPSMD, Plymouth, United Kingdom
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172
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Dennison MJ, Rosen ML, Sambrook KA, Jenness JL, Sheridan MA, McLaughlin KA. Differential Associations of Distinct Forms of Childhood Adversity With Neurobehavioral Measures of Reward Processing: A Developmental Pathway to Depression. Child Dev 2017; 90:e96-e113. [PMID: 29266223 DOI: 10.1111/cdev.13011] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Childhood adversity is associated with altered reward processing, but little is known about whether this varies across distinct types of adversity. In a sample of 94 children (6-19 years), we investigated whether experiences of material deprivation, emotional deprivation, and trauma have differential associations with reward-related behavior and white matter microstructure in tracts involved in reward processing. Material deprivation (food insecurity), but not emotional deprivation or trauma, was associated with poor reward performance. Adversity-related influences on the integrity of white matter microstructure in frontostriatal tracts varied across childhood adversity types, and reductions in frontostriatal white matter integrity mediated the association of food insecurity with depressive symptoms. These findings document distinct behavioral and neurodevelopmental consequences of specific forms of adversity that have implications for psychopathology risk.
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173
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Koini M, Rombouts SARB, Veer IM, Van Buchem MA, Huijbregts SCJ. White matter microstructure of patients with neurofibromatosis type 1 and its relation to inhibitory control. Brain Imaging Behav 2017; 11:1731-1740. [PMID: 27796732 PMCID: PMC5707233 DOI: 10.1007/s11682-016-9641-3] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Neurofibromatosis Type 1 (NF1) is commonly associated with deficits in executive functions such as working memory and inhibitory control. A valid biomarker to describe the pathological basis of these deficits in NF1 is not available. The aim of this study was to investigate whether any abnormalities in white matter integrity of the executive function related anterior thalamic radiation (ATR), cingulate bundle (CB), and superior longitudinal fasciculus (SLF) may be regarded as a pathological basis for inhibitory control deficits in adolescents with NF1. Sixteen NF1 patients and 32 healthy controls underwent 3 T DTI MRI scanning. Whole brain-, ATR-, CB-, and SLF-white matter integrity were studied using fractional anisotropy, mean (MD), radial, and axial (DA) diffusivity. Correlation analyses between white matter metrics and inhibitory control (as measured with a computerized task) were performed. Also, verbal and performance abilities (IQ-estimates) were assessed and correlated with white matter metrics. Patients showed significant whole brain- and local microstructural pathology when compared to healthy controls in all measures. In NF1-patients, whole-brain (MD: r = .646 and DA: r = .673) and ATR- (r-range: -.405-.771), but not the CB- (r-range: -.307-.472) and SLF- (r-range: -.187-.406) white matter integrity, were correlated with inhibitory control. Verbal and performance abilities were not associated with white matter pathology. In NF1, white matter abnormalities are observed throughout the brain, but damage to the ATR seems specifically, or at least most strongly related to inhibitory control. Future studies should examine whether reduced white matter integrity in other brain regions or tracts is (more strongly) associated with different aspects of the cognitive-behavioral phenotype associated with NF1.
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Affiliation(s)
- M Koini
- Institute of Psychology, Leiden University, Leiden, The Netherlands.
- Leiden Institute for Brain and Cognition (LIBC), Leiden University, Leiden, The Netherlands.
- Department of Neurology, Medical University of Graz, Auenbruggerplatz 22, A-8036, Graz, Austria.
| | - S A R B Rombouts
- Institute of Psychology, Leiden University, Leiden, The Netherlands
- Leiden Institute for Brain and Cognition (LIBC), Leiden University, Leiden, The Netherlands
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - I M Veer
- Leiden Institute for Brain and Cognition (LIBC), Leiden University, Leiden, The Netherlands
- Department of Psychiatry and Psychotherapy, Division of Mind and Brain Research, Charité Universitaetsmedizin Berlin, Berlin, Germany
| | - M A Van Buchem
- Leiden Institute for Brain and Cognition (LIBC), Leiden University, Leiden, The Netherlands
- Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
| | - S C J Huijbregts
- Leiden Institute for Brain and Cognition (LIBC), Leiden University, Leiden, The Netherlands
- Department of Clinical Child and Adolescent Studies, Leiden University, Leiden, The Netherlands
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174
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Park JH, Kim CS, Won KS, Oh JS, Kim JS, Kim HW. Asymmetry of cerebral glucose metabolism in very low-birth-weight infants without structural abnormalities. PLoS One 2017; 12:e0186976. [PMID: 29095842 PMCID: PMC5667759 DOI: 10.1371/journal.pone.0186976] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/11/2017] [Indexed: 12/30/2022] Open
Abstract
Even when structural abnormalities are not observed on the brain magnetic resonance images (MRI) of very low-birth-weight (VLBW) infants, such infants are at increased risk for poor neurodevelopment. The aim of the present study was to evaluate cerebral glucose metabolism in VLBW infants without apparent structural abnormalities on MRI.
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Affiliation(s)
- Jae Hyun Park
- Department of Pediatrics, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea
| | - Chun Soo Kim
- Department of Pediatrics, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea
| | - Kyoung Sook Won
- Department of Nuclear Medicine, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea
| | - Jungsu S. Oh
- Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Seung Kim
- Department of Nuclear Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hae Won Kim
- Department of Nuclear Medicine, Keimyung University Dongsan Medical Center, Daegu, Republic of Korea
- * E-mail:
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175
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White Matter Structure in Older Adults Moderates the Benefit of Sleep Spindles on Motor Memory Consolidation. J Neurosci 2017; 37:11675-11687. [PMID: 29084867 DOI: 10.1523/jneurosci.3033-16.2017] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 10/16/2017] [Indexed: 11/21/2022] Open
Abstract
Sleep spindles promote the consolidation of motor skill memory in young adults. Older adults, however, exhibit impoverished sleep-dependent motor memory consolidation. The underlying pathophysiological mechanism(s) explaining why motor memory consolidation in older adults fails to benefit from sleep remains unclear. Here, we demonstrate that male and female older adults show impoverished overnight motor skill memory consolidation relative to young adults, with the extent of impairment being associated with the degree of reduced frontal fast sleep spindle density. The magnitude of the loss of frontal fast sleep spindles in older adults was predicted by the degree of reduced white matter integrity throughout multiple white matter tracts known to connect subcortical and cortical brain regions. We further demonstrate that the structural integrity of selective white matter fiber tracts, specifically within right posterior corona radiata, right tapetum, and bilateral corpus callosum, statistically moderates whether sleep spindles promoted overnight consolidation of motor skill memory. Therefore, white matter integrity within tracts known to connect cortical sensorimotor control regions dictates the functional influence of sleep spindles on motor skill memory consolidation in the elderly. The deterioration of white matter fiber tracts associated with human brain aging thus appears to be one pathophysiological mechanism influencing subcortical-cortical propagation of sleep spindles and their related memory benefits.SIGNIFICANCE STATEMENT Numerous studies have shown that sleep spindle expression is reduced and sleep-dependent motor memory is impaired in older adults. However, the mechanisms underlying these alterations have remained unknown. The present study reveals that age-related degeneration of white matter within select fiber tracts is associated with reduced sleep spindles in older adults. We further demonstrate that, within these same fiber tracts, the degree of degeneration determines whether sleep spindles can promote motor memory consolidation. Therefore, white matter integrity in the human brain, more than age per se, determines the magnitude of decline in sleep spindles in later life and, with it, the success (or lack thereof) of sleep-dependent motor memory consolidation in older adults.
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176
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Dolci S, Pino A, Berton V, Gonzalez P, Braga A, Fumagalli M, Bonfanti E, Malpeli G, Pari F, Zorzin S, Amoroso C, Moscon D, Rodriguez FJ, Fumagalli G, Bifari F, Decimo I. High Yield of Adult Oligodendrocyte Lineage Cells Obtained from Meningeal Biopsy. Front Pharmacol 2017; 8:703. [PMID: 29075188 PMCID: PMC5643910 DOI: 10.3389/fphar.2017.00703] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/21/2017] [Indexed: 12/25/2022] Open
Abstract
Oligodendrocyte loss can lead to cognitive and motor deficits. Current remyelinating therapeutic strategies imply either modulation of endogenous oligodendrocyte precursors or transplantation of in vitro expanded oligodendrocytes. Cell therapy, however, still lacks identification of an adequate source of oligodendrocyte present in adulthood and able to efficiently produce transplantable cells. Recently, a neural stem cell-like population has been identified in meninges. We developed a protocol to obtain high yield of oligodendrocyte lineage cells from one single biopsy of adult rat meningeal tissue. From 1 cm2 of adult rat spinal cord meninges, we efficiently expanded a homogenous culture of 10 millions of meningeal-derived oligodendrocyte lineage cells in a short period of time (approximately 4 weeks). Meningeal-derived oligodendrocyte lineage cells show typical mature oligodendrocyte morphology and express specific oligodendrocyte markers, such as galactosylceramidase and myelin basic protein. Moreover, when transplanted in a chemically demyelinated spinal cord model, meningeal-derived oligodendrocyte lineage cells display in vivo-remyelinating potential. This oligodendrocyte lineage cell population derives from an accessible and adult source, being therefore a promising candidate for autologous cell therapy of demyelinating diseases. In addition, the described method to differentiate meningeal-derived neural stem cells into oligodendrocyte lineage cells may represent a valid in vitro model to dissect oligodendrocyte differentiation and to screen for drugs capable to promote oligodendrocyte regeneration.
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Affiliation(s)
- Sissi Dolci
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Annachiara Pino
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Valeria Berton
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Pau Gonzalez
- Group of Molecular Neurology, Hospital Nacional de Parapléjicos, Toledo, Spain
| | - Alice Braga
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Marta Fumagalli
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Elisabetta Bonfanti
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmacological and Biomolecular Sciences, University of Milan, Milan, Italy
| | - Giorgio Malpeli
- Section of General and Pancreatic Surgery, Department of Surgery, Dentistry, Paediatrics and Gynaecology, University of Verona, Verona, Italy
| | - Francesca Pari
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Stefania Zorzin
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Clelia Amoroso
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Denny Moscon
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | | | - Guido Fumagalli
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
| | - Francesco Bifari
- Laboratory of Cell Metabolism and Regenerative Medicine, Department of Medical Biotechnology and Translational Medicine, University of Milan, Milan, Italy
| | - Ilaria Decimo
- Section of Pharmacology, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
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177
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Uyanıkgil Y, Turgut M, Baka M. Effects of Melatonin on the Cerebellum of Infant Rat Following Kaolin-Induced Hydrocephalus: a Histochemical and Immunohistochemical Study. THE CEREBELLUM 2017; 16:142-150. [PMID: 27113349 DOI: 10.1007/s12311-016-0778-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrocephalus is a developmental disorder causing abnormally collected cerebrospinal fluid within the cerebral ventricles. It leads to bigger skulls and many dysfunctions related to the nervous system. Here, we addressed whether exogenous melatonin administration could reverse the clinical features of kaolin-induced hydrocephalus in infantile rats. A controlled double-blinded study was conducted in 2-week-old 45 Wistar albino rats, which were divided into three groups: Group A, the control group, received intracisternal sham injection with solely the needle insertion; group B, the hydrocephalus group, was treated with isotonic NaCl after kaolin injection; and group C, the hydrocephalus + melatonin group, was given i.p. exogenous melatonin at a dose of 0.5 mg/100 g body weight after kaolin injection. Histological and immunohistochemical analyses were performed after the induction of hydrocephalus and melatonin administration. Glial fibrillary acidic protein was stained by immunohistochemical method. TUNEL method was used to define and quantitate apoptosis in the cerebellar tissues. Statistical analysis was performed by nonparametric Kruskal-Wallis H test, and once significance was determined among means, post hoc pairwise comparisons were carried out using Mann-Whitney U test. We found that melatonin administration significantly ameliorated ratio of substantia grisea area/substantia alba area in the cerebellum of infantile rats. Histologically, there was a significant reduction in the number of cerebellar apoptotic cells after the hydrocephalus induced by kaolin (P < 0.05). Our results clearly revealed that the histopathological changes in the cerebellum were reversed by systemic melatonin administration in infantile rats with kaolin-induced hydrocephalus. Nevertheless, further studies are needed to suggest melatonin as a candidate protective drug in children with hydrocephalus.
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Affiliation(s)
- Yiğit Uyanıkgil
- Department of Histology and Embryology, Ege University School of Medicine, Izmir, Turkey.,Cord Blood, Cell-Tissue Research and Application Center, Ege University, Izmir, Turkey
| | - Mehmet Turgut
- Department of Neurosurgery, Adnan Menderes University School of Medicine, Aydın, Turkey. .,, Cumhuriyet Mahallesi, Adnan Menderes Bulvarı, Haltur Apartmanı, No: 6 Daire: 7, TR-09020, Aydın, Turkey.
| | - Meral Baka
- Department of Histology and Embryology, Ege University School of Medicine, Izmir, Turkey.,Cord Blood, Cell-Tissue Research and Application Center, Ege University, Izmir, Turkey
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178
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Keunen K, Benders MJ, Leemans A, Fieret-Van Stam PC, Scholtens LH, Viergever MA, Kahn RS, Groenendaal F, de Vries LS, van den Heuvel MP. White matter maturation in the neonatal brain is predictive of school age cognitive capacities in children born very preterm. Dev Med Child Neurol 2017; 59:939-946. [PMID: 28675542 DOI: 10.1111/dmcn.13487] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/19/2017] [Indexed: 11/30/2022]
Abstract
AIM To investigate the association between white matter organization in the neonatal brain and cognitive capacities at early school age in children born very preterm. METHOD Thirty children born very preterm (gestational age median 27.5wks, interquartile range [IQR] 25.5-29.5; 18 males, 12 females) were included in this retrospective observational cohort study. Diffusion-weighted imaging (DWI) had been performed on a 3T system in the neonatal period (median 41.3 [IQR 40.0-42.6]wks) and cognitive functioning was formally assessed at age 5 years and 7 months (IQR 5.4-5.9y) using the Wechsler Preschool and Primary Scale of Intelligence. Structural connectivity maps were reconstructed from the DWI data using deterministic streamline tractography. Network metrics of global and local communication and mean fractional anisotropy of white matter pathways were related to IQ and processing speed at age 5 years using linear regression analyses. RESULTS Mean fractional anisotropy was significantly related to Performance IQ at age 5 years (F=8.48, p=0.007). Findings persisted after adjustment for maternal education level. INTERPRETATION Our findings provide evidence that the blueprint of later cognitive achievement is already present at term-equivalent age and suggest that white matter connectivity strength may be a valuable predictor for long-term cognitive functioning.
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Affiliation(s)
- Kristin Keunen
- Department of Neonatology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, the Netherlands.,Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Manon J Benders
- Department of Neonatology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, the Netherlands.,Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Alexander Leemans
- Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.,Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Petronella C Fieret-Van Stam
- Department of Medical Psychology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Lianne H Scholtens
- Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.,Department of Psychiatry, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Max A Viergever
- Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.,Image Sciences Institute, University Medical Center Utrecht, Utrecht, the Netherlands
| | - René S Kahn
- Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.,Department of Psychiatry, University Medical Center Utrecht, Utrecht, the Netherlands.,Department of Psychiatry, Icahn School of Medicine Mount Sinai, NY, USA
| | - Floris Groenendaal
- Department of Neonatology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, the Netherlands.,Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Linda S de Vries
- Department of Neonatology, Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht, the Netherlands.,Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Martijn P van den Heuvel
- Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, the Netherlands.,Department of Psychiatry, University Medical Center Utrecht, Utrecht, the Netherlands
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179
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Fitzgerald J, Leemans A, Kehoe E, O'Hanlon E, Gallagher L, McGrath J. Abnormal fronto-parietal white matter organisation in the superior longitudinal fasciculus branches in autism spectrum disorders. Eur J Neurosci 2017; 47:652-661. [DOI: 10.1111/ejn.13655] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 07/13/2017] [Accepted: 07/13/2017] [Indexed: 11/27/2022]
Affiliation(s)
- Jacqueline Fitzgerald
- Department of Psychiatry; School of Medicine; Trinity College Dublin; Dublin Ireland
- Trinity College Institute of Neuroscience; Trinity College Dublin; Lloyd Building Dublin Ireland
| | - Alexander Leemans
- Image Sciences Institute; University Medical Center Utrecht; Utrecht The Netherlands
| | - Elizabeth Kehoe
- Trinity College Institute of Neuroscience; Trinity College Dublin; Lloyd Building Dublin Ireland
| | - Erik O'Hanlon
- Trinity College Institute of Neuroscience; Trinity College Dublin; Lloyd Building Dublin Ireland
- Department of Psychiatry; Royal College of Surgeons in Ireland; Dublin Ireland
| | - Louise Gallagher
- Department of Psychiatry; School of Medicine; Trinity College Dublin; Dublin Ireland
- Linndara Child and Adolescent Mental Health Service; Dublin Ireland
| | - Jane McGrath
- Department of Psychiatry; School of Medicine; Trinity College Dublin; Dublin Ireland
- Linndara Child and Adolescent Mental Health Service; Dublin Ireland
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180
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Chalah MA, Kauv P, Lefaucheur JP, Hodel J, Créange A, Ayache SS. Theory of mind in multiple sclerosis: A neuropsychological and MRI study. Neurosci Lett 2017; 658:108-113. [PMID: 28855125 DOI: 10.1016/j.neulet.2017.08.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 08/17/2017] [Accepted: 08/23/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES Social cognition stands among the most frequently affected yet the least studied cognitive domains in multiple sclerosis (MS). Theory of mind (ToM) is a social cognitive facet that implies the one's ability to predict others' mental states. The objective of this study was to assess the relationship between ToM and neuropsychological and neuroimaging data. METHODS Thirty-eight consecutive MS patients completed the Reading the Mind in the Eyes test (RMET). They underwent a neuropsychological evaluation and a 3T T1-weighted brain MRI. A fully automated volume-based morphometry algorithm (MorphoBox) was applied to calculate regional brain volumes. Correlation analysis was performed using Spearman's test. RESULTS Among the sociodemographic and clinical data, significant correlations were found between RMET scores and each of years of education (r=0.54; p<0.01) and the duration of the disease progressive phase (r=-0.46; p<0.01). Regarding neuropsychological measures, RMET scores were directly correlated with information processing speed (r=0.58; p<0.01) and empathy (r=0.46; p<0.01) scores. As for brain volumes, RMET scores were directly correlated with parietal (left: r=0.39; right: r=0.46; p<0.05) and temporal (left: r=0.36; right: r=0.40; p<0.05) white matter volumes, as well as with cingulate (left: r=0.32; right: r=0.44; p<0.05) gray matter volumes. CONCLUSION These results highlight the relationship between ToM and some of the disease characteristics and cognitive domains. Importantly, ToM performance in MS is associated with brain volumes of key areas in social cognitive networks. Further works are needed to enhance the current knowledge on the underlying mechanisms of ToM deficits in this population.
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Affiliation(s)
- Moussa A Chalah
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Physiologie-Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Paul Kauv
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Neuroradiologie, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Jean-Pascal Lefaucheur
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Physiologie-Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Jérôme Hodel
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Neuroradiologie, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Alain Créange
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Neurologie, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France
| | - Samar S Ayache
- EA 4391, Excitabilité Nerveuse et Thérapeutique, Université Paris-Est-Créteil, Créteil, France; Service de Physiologie-Explorations Fonctionnelles, Hôpital Henri Mondor, Assistance Publique-Hôpitaux de Paris, Créteil, France; Neurology Division, Lebanese American University Medical Center Rizk Hospital, Beirut, Lebanon.
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181
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Tao C, Hu X, Li H, You C. White Matter Injury after Intracerebral Hemorrhage: Pathophysiology and Therapeutic Strategies. Front Hum Neurosci 2017; 11:422. [PMID: 28890692 PMCID: PMC5575148 DOI: 10.3389/fnhum.2017.00422] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 08/04/2017] [Indexed: 02/05/2023] Open
Abstract
Intracerebral hemorrhage (ICH) accounts for 10%–30% of all types of stroke. Bleeding within the brain parenchyma causes gray matter (GM) destruction as well as proximal or distal white matter (WM) injury (WMI) due to complex pathophysiological mechanisms. Because WM has a distinct cellular architecture, blood supply pattern and corresponding function, and its response to stroke may vary from that of GM, a better understanding of the characteristics of WMI following ICH is essential and may shed new light on treatment options. Current evidence using histological, radiological and chemical biomarkers clearly confirms the spatio-temporal distribution of WMI post- ICH. Although certain types of pathological damage such as inflammatory, oxidative and neuro-excitotoxic injury to WM have been identified, the exact molecular mechanisms remain unclear. In this review article, we briefly describe the constitution and physiological function of brain WM, summarize evidence regarding WMI, and focus on the underlying pathophysiological mechanisms and therapeutic strategies.
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Affiliation(s)
- Chuanyuan Tao
- Stroke Clinical Research Unit, Department of Neurosurgery, West China Hospital, Sichuan UniversityChengdu, China
| | - Xin Hu
- Stroke Clinical Research Unit, Department of Neurosurgery, West China Hospital, Sichuan UniversityChengdu, China
| | - Hao Li
- Stroke Clinical Research Unit, Department of Neurosurgery, West China Hospital, Sichuan UniversityChengdu, China
| | - Chao You
- Stroke Clinical Research Unit, Department of Neurosurgery, West China Hospital, Sichuan UniversityChengdu, China
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182
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Neuroimaging studies in patients with psychogenic non-epileptic seizures: A systematic meta-review. NEUROIMAGE-CLINICAL 2017; 16:210-221. [PMID: 28808618 PMCID: PMC5544493 DOI: 10.1016/j.nicl.2017.07.025] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 07/24/2017] [Accepted: 07/26/2017] [Indexed: 11/22/2022]
Abstract
Psychogenic Non-epileptic Seizures (PNES) are ‘medically unexplained’ seizure-like episodes which superficially resemble epileptic seizures but which are not caused by epileptiform discharges in the brain. While many experts see PNES disorder as a multifactorial biopsychosocial condition, little is known about the neurobiological processes which may predispose, precipitate and/or perpetuate PNES symptomology. This systematic meta-review advances our knowledge and understanding of the neurobiological correlates of PNES by providing an up-to-date assessment of neuroimaging studies performed on individuals with PNES. Although the results presented appear inconclusive, they are consistent with an association between structural and functional brain abnormalities and PNES. These findings have implications for the way in which we think about this “medically unexplained” disorder and how we communicate the diagnosis to patients. However, it is also evident that neuroimaging studies in this area suffer from a number of significant limitations and future larger studies will need to better address these if we are to improve our understanding of the neurobiological correlates of predisposition to and/or manifestation of PNES. Neuroimaging results point to neurobiological correlates of PNES. Lack of convergent findings point to heterogeneous condition. Lack of high quality neuroimaging studies represents weak evidence base. Larger serial neuroimaging studies to assess state/trait characteristics required Future neuroimaging studies should use additional objective physiological measures.
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183
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Figley TD, Mortazavi Moghadam B, Bhullar N, Kornelsen J, Courtney SM, Figley CR. Probabilistic White Matter Atlases of Human Auditory, Basal Ganglia, Language, Precuneus, Sensorimotor, Visual and Visuospatial Networks. Front Hum Neurosci 2017; 11:306. [PMID: 28751859 PMCID: PMC5508110 DOI: 10.3389/fnhum.2017.00306] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 05/29/2017] [Indexed: 12/13/2022] Open
Abstract
Background: Despite the popularity of functional connectivity analyses and the well-known topology of several intrinsic cortical networks, relatively little is known about the white matter regions (i.e., structural connectivity) underlying these networks. In the current study, we have therefore performed fMRI-guided diffusion tensor imaging (DTI) tractography to create probabilistic white matter atlases for eight previously identified functional brain networks, including the Auditory, Basal Ganglia, Language, Precuneus, Sensorimotor, Primary Visual, Higher Visual and Visuospatial Networks. Methods: Whole-brain diffusion imaging data were acquired from a cohort of 32 healthy volunteers, and were warped to the ICBM template using a two-stage, high-dimensional, non-linear spatial normalization procedure. Deterministic tractography, with fractional anisotropy (FA) ≥0.15 and deviation angle <50°, was then performed using the Fiber Association by Continuous Tracking (FACT) algorithm, and a multi-ROI approach to identify tracts of interest. Regions-of-interest (ROIs) for each of the eight networks were taken from a pre-existing atlas of functionally defined regions to explore all ROI-to-ROI connections within each network, and all resulting streamlines were saved as binary masks to create probabilistic atlases (across participants) for tracts between each ROI-to-ROI pair. Results: The resulting functionally-defined white matter atlases (i.e., for each tract and each network as a whole) were saved as NIFTI images in stereotaxic ICBM coordinates, and have been added to the UManitoba-JHU Functionally-Defined Human White Matter Atlas (http://www.nitrc.org/projects/uofm_jhu_atlas/). Conclusion: To the best of our knowledge, this work represents the first attempt to comprehensively identify and map white matter connectomes for the Auditory, Basal Ganglia, Language, Precuneus, Sensorimotor, Primary Visual, Higher Visual and Visuospatial Networks. Therefore, the resulting probabilistic atlases represent a unique tool for future neuroimaging studies wishing to ascribe voxel-wise or ROI-based changes (i.e., in DTI or other quantitative white matter imaging signals) to these functional brain networks.
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Affiliation(s)
- Teresa D Figley
- Department of Radiology, University of ManitobaWinnipeg, MB, Canada.,Division of Diagnostic Imaging, Health Sciences CentreWinnipeg, MB, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced MedicineWinnipeg, MB, Canada
| | - Behnoush Mortazavi Moghadam
- Department of Radiology, University of ManitobaWinnipeg, MB, Canada.,Division of Diagnostic Imaging, Health Sciences CentreWinnipeg, MB, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced MedicineWinnipeg, MB, Canada
| | - Navdeep Bhullar
- Department of Radiology, University of ManitobaWinnipeg, MB, Canada.,Division of Diagnostic Imaging, Health Sciences CentreWinnipeg, MB, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced MedicineWinnipeg, MB, Canada
| | - Jennifer Kornelsen
- Department of Radiology, University of ManitobaWinnipeg, MB, Canada.,Division of Diagnostic Imaging, Health Sciences CentreWinnipeg, MB, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced MedicineWinnipeg, MB, Canada.,Department of Physiology and Pathophysiology, University of ManitobaWinnipeg, MB, Canada.,St. Boniface Hospital Research, Catholic Health Corporation of ManitobaWinnipeg, MB, Canada
| | - Susan M Courtney
- Department of Psychological and Brain Sciences, Johns Hopkins UniversityBaltimore, MD, United States.,Solomon H. Snyder Department of Neuroscience, Johns Hopkins UniversityBaltimore, MD, United States.,F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger InstituteBaltimore, MD, United States
| | - Chase R Figley
- Department of Radiology, University of ManitobaWinnipeg, MB, Canada.,Division of Diagnostic Imaging, Health Sciences CentreWinnipeg, MB, Canada.,Neuroscience Research Program, Kleysen Institute for Advanced MedicineWinnipeg, MB, Canada.,Department of Physiology and Pathophysiology, University of ManitobaWinnipeg, MB, Canada.,Department of Psychological and Brain Sciences, Johns Hopkins UniversityBaltimore, MD, United States.,Biomedical Engineering Graduate Program, University of ManitobaWinnipeg, MB, Canada
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184
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Agyemang AA, Sveinsdóttir K, Vallius S, Sveinsdóttir S, Bruschettini M, Romantsik O, Hellström A, Smith LEH, Ohlsson L, Holmqvist B, Gram M, Ley D. Cerebellar Exposure to Cell-Free Hemoglobin Following Preterm Intraventricular Hemorrhage: Causal in Cerebellar Damage? Transl Stroke Res 2017; 8:10.1007/s12975-017-0539-1. [PMID: 28601919 PMCID: PMC5590031 DOI: 10.1007/s12975-017-0539-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/09/2017] [Indexed: 11/05/2022]
Abstract
Decreased cerebellar volume is associated with intraventricular hemorrhage (IVH) in very preterm infants and may be a principal component in neurodevelopmental impairment. Cerebellar deposition of blood products from the subarachnoid space has been suggested as a causal mechanism in cerebellar underdevelopment following IVH. Using the preterm rabbit pup IVH model, we evaluated the effects of IVH induced at E29 (3 days prior to term) on cerebellar development at term-equivalent postnatal day 0 (P0), term-equivalent postnatal day 2 (P2), and term-equivalent postnatal day 5 (P5). Furthermore, the presence of cell-free hemoglobin (Hb) in cerebellar tissue was characterized, and cell-free Hb was evaluated as a causal factor in the development of cerebellar damage following preterm IVH. IVH was associated with a decreased proliferative (Ki67-positive) portion of the external granular layer (EGL), delayed Purkinje cell maturation, and activated microglia in the cerebellar white matter. In pups with IVH, immunolabeling of the cerebellum at P0 demonstrated a widespread presence of cell-free Hb, primarily distributed in the white matter and the molecular layer. Intraventricular injection of the Hb scavenger haptoglobin (Hp) resulted in a corresponding distribution of immunolabeled Hp in the cerebellum and a partial reversal of the damaging effects observed following IVH. The results suggest that cell-free Hb is causally involved in cerebellar damage following IVH and that blocking cell-free Hb may have protective effects.
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Affiliation(s)
- Alex Adusei Agyemang
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Kristbjörg Sveinsdóttir
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Suvi Vallius
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Snjolaug Sveinsdóttir
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Matteo Bruschettini
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Olga Romantsik
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Ann Hellström
- Department of Ophthalmology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lois E H Smith
- Department of Ophthalmology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | | | | | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
- Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden.
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185
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An energy minimization method for MS lesion segmentation from T1-w and FLAIR images. Magn Reson Imaging 2017; 39:1-6. [DOI: 10.1016/j.mri.2016.04.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 04/12/2016] [Indexed: 11/19/2022]
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186
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Screening for novel central nervous system biomarkers in veterans with Gulf War Illness. Neurotoxicol Teratol 2017; 61:36-46. [DOI: 10.1016/j.ntt.2017.03.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 03/02/2017] [Accepted: 03/03/2017] [Indexed: 12/19/2022]
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187
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Jiang J, Zhao YJ, Hu XY, Du MY, Chen ZQ, Wu M, Li KM, Zhu HY, Kumar P, Gong QY. Microstructural brain abnormalities in medication-free patients with major depressive disorder: a systematic review and meta-analysis of diffusion tensor imaging. J Psychiatry Neurosci 2017; 42:150-163. [PMID: 27780031 PMCID: PMC5403660 DOI: 10.1503/jpn.150341] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Multiple meta-analyses of diffusion tensor imaging (DTI) studies have reported impaired white matter integrity in patients with major depressive disorder (MDD). However, owing to inclusion of medicated patients in these studies, it is difficult to conclude whether these reported alterations are associated with MDD or confounded by medication effects. A meta-analysis of DTI studies on medication-free (medication-naive and medication washout) patients with MDD would therefore be necessary to disentangle MDD-specific effects. METHODS We analyzed white matter alterations between medication-free patients with MDD and healthy controls using anisotropic effect size-signed differential mapping (AES-SDM). We used DTI query software for fibre tracking. RESULTS Both pooled and subgroup meta-analyses in medication washout patients showed robust fractional anisotropy (FA) reductions in white matter of the right cerebellum hemispheric lobule, body of the corpus callosum (CC) and bilateral superior longitudinal fasciculus III (SLF III), whereas FA reductions in the genu of the CC and right anterior thalamic projections were seen in only medication-naive patients. Fibre tracking showed that the main tracts with observed FA reductions included the right cerebellar tracts, body of the CC, bilateral SLF III and arcuate fascicle. LIMITATIONS The analytic techniques, patient characteristics and clinical variables of the included studies were heterogeneous; we could not exclude the effects of nondrug therapies owing to a lack of data. CONCLUSION By excluding the confounding influences of current medication status, findings from the present study may provide a better understanding of the underlying neuropathology of MDD.
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Affiliation(s)
| | | | | | | | | | | | | | - Hong-Yan Zhu
- Correspondence to: H. Zhu or Q. Gong, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, 610041, China; or
| | | | - Qi-Yong Gong
- Correspondence to: H. Zhu or Q. Gong, Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital of Sichuan University, Chengdu, 610041, China; or
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188
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Morie KP, Yip SW, Zhai ZW, Xu J, Hamilton KR, Mayes LC, Potenza MN, Potenza MN. White-matter crossing-fiber microstructure in adolescents prenatally exposed to cocaine. Drug Alcohol Depend 2017; 174:23-29. [PMID: 28292689 PMCID: PMC5555052 DOI: 10.1016/j.drugalcdep.2017.01.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/05/2017] [Accepted: 01/07/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Prenatal cocaine exposure (PCE) is associated with risk-taking behaviors, including increased initiation of substance use in adolescence. The neurobiological underpinnings of these behaviors in adolescents with PCE are not well understood. The goal of this study was to compare diffusion-weighted imaging data between adolescents with and without PCE using crossing-fiber models, which may provide more comprehensive estimates of white-matter microstructure within regions of multiple (e.g., primary and secondary) fiber orientations. METHODS Thirty-nine PCE individuals and 17 comparably aged prenatally non-drug-exposed (NDE) youths were recruited from a longitudinal cohort followed since birth. White matter was examined using tensor-derived and crossing-fiber models. Whole-brain investigations were performed, as were analyses on seven white-matter regions, which included the splenium, body and genu of the corpus callosum, bilateral cingulum, and the right and left superior longitudinal fasciculus (SLF). RESULTS Whole-brain analyses revealed no group differences. However, ROI analyses for anisotropy estimates derived from the crossing-fiber model revealed significant group differences for secondary fibers, with reduced anisotropy among PCE adolescents compared to prenatally non-exposed youth in the right cingulum and the left SLF, and increased anisotropy in the genu. CONCLUSIONS Our findings suggest that white-matter differences in PCE adolescents are subtle and localized primarily within secondary fiber orientations, perhaps arising from altered white-matter development.
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Affiliation(s)
- Kristen P. Morie
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA,Corresponding author: Kristen Morie,
| | - Sarah W. Yip
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA,National Center on Addictions and Substance Abuse, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Zu Wei Zhai
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Jiansong Xu
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Kristen R. Hamilton
- Department of Psychology, University of Maryland, College Park, MD, 20742 USA
| | - Linda C. Mayes
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA,Child Study Center, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Marc N. Potenza
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA,National Center on Addictions and Substance Abuse, Yale University School of Medicine, New Haven, CT, 06510, USA,Child Study Center, Yale University School of Medicine, New Haven, CT, 06510, USA,Department of Neuroscience, Yale University School of Medicine, New Haven, CT, 06510, USA,Connecticut Mental Health Center, New Haven, CT, 06519, USA
| | - Marc N Potenza
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, 06510, USA; National Center on Addictions and Substance Abuse, Yale University School of Medicine, New Haven, CT, 06510, USA; Child Study Center, Yale University School of Medicine, New Haven, CT, 06510, USA; Department of Neuroscience, Yale University School of Medicine, New Haven, CT, 06510, USA; Connecticut Mental Health Center, New Haven, CT, 06519, USA
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189
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Privado J, Román FJ, Saénz-Urturi C, Burgaleta M, Colom R. Gray and white matter correlates of the Big Five personality traits. Neuroscience 2017; 349:174-184. [PMID: 28259799 DOI: 10.1016/j.neuroscience.2017.02.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 02/14/2017] [Accepted: 02/17/2017] [Indexed: 10/20/2022]
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190
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Fern R. The Leukocentric Theory of Neurological Disorder: A Manifesto. Neurochem Res 2017; 42:2666-2672. [DOI: 10.1007/s11064-017-2279-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/12/2017] [Accepted: 04/21/2017] [Indexed: 01/26/2023]
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191
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Differential Associations of Socioeconomic Status With Global Brain Volumes and White Matter Lesions in African American and White Adults: the HANDLS SCAN Study. Psychosom Med 2017; 79:327-335. [PMID: 27806019 PMCID: PMC5373998 DOI: 10.1097/psy.0000000000000408] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The aim of the study was to examine interactive relations of race and socioeconomic status (SES) to magnetic resonance imaging (MRI)-assessed global brain outcomes with previously demonstrated prognostic significance for stroke, dementia, and mortality. METHODS Participants were 147 African Americans (AAs) and whites (ages 33-71 years; 43% AA; 56% female; 26% below poverty) in the Healthy Aging in Neighborhoods of Diversity across the Life Span SCAN substudy. Cranial MRI was conducted using a 3.0 T unit. White matter (WM) lesion volumes and total brain, gray matter, and WM volumes were computed. An SES composite was derived from education and poverty status. RESULTS Significant interactions of race and SES were observed for WM lesion volume (b = 1.38; η = 0.036; p = .028), total brain (b = 86.72; η = 0.042; p < .001), gray matter (b = 40.16; η = 0.032; p = .003), and WM (b = 46.56; η = 0.050; p < .001). AA participants with low SES exhibited significantly greater WM lesion volumes than white participants with low SES. White participants with higher SES had greater brain volumes than all other groups (albeit within normal range). CONCLUSIONS Low SES was associated with greater WM pathology-a marker for increased stroke risk-in AAs. Higher SES was associated with greater total brain volume-a putative global indicator of brain health and predictor of mortality-in whites. Findings may reflect environmental and interpersonal stressors encountered by AAs and those of lower SES and could relate to disproportionate rates of stroke, dementia, and mortality.
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192
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Hashim E, Caverzasi E, Papinutto N, Lewis CE, Jing R, Charles O, Zhang S, Lin A, Graham SJ, Schweizer TA, Bharatha A, Cusimano MD. Investigating Microstructural Abnormalities and Neurocognition in Sub-Acute and Chronic Traumatic Brain Injury Patients with Normal-Appearing White Matter: A Preliminary Diffusion Tensor Imaging Study. Front Neurol 2017; 8:97. [PMID: 28373856 PMCID: PMC5357974 DOI: 10.3389/fneur.2017.00097] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 02/28/2017] [Indexed: 11/23/2022] Open
Abstract
For a significant percentage of subjects, with chronic traumatic brain injury (TBI), who report persisting cognitive impairment and functional loss, the diagnosis is often impeded by the fact that routine neuroimaging often does not reveal any abnormalities. In this paper, we used diffusion tensor imaging (DTI) to investigate the apparently normal white matter (as assessed by routine magnetic resonance imaging) in the brains of 19 subjects with sub-acute (9) and chronic (10) TBI. We also assessed memory, executive function, and visual-motor coordination in these subjects. Using a voxel-wise approach, we investigated if parameters of diffusion were significantly different between TBI subjects and 17 healthy controls (HC), who were demographically matched to the TBI group. We also investigated if changes in DTI parameters were associated with neuropsychological performance in either group. Our results indicate significantly increased mean and axial diffusivity (MD and AD, respectively) values in widespread brain locations in TBI subjects, while controlling for age, sex, and time since injury. HC performed significantly better than the TBI subjects on tests of memory and executive function, indicating the persisting functional loss in chronic TBI. We found no correlation between diffusion parameters and performance on test of executive function in either group. We found negative correlation between FA and composite memory scores, and positive correlation between RD and visuomotor coordination test scores, in various tracts in both groups. Our study suggests that changes in MD and AD can indicate persisting micro-structure abnormalities in normal-appearing white matter in the brains of subjects with chronic TBI. Our results also suggest that FA in major white matter tracts is correlated with memory in health and in disease, alike; larger and longitudinal studies are needed to discern potential differences in these correlations in the two groups.
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Affiliation(s)
- Eyesha Hashim
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Eduardo Caverzasi
- Department of Neurology, University of California at San Francisco, San Francisco, CA, USA; Department of Brain and Behavioral Sciences, University of Pavia, Italy
| | - Nico Papinutto
- Department of Neurology, University of California at San Francisco , San Francisco, CA , USA
| | - Caroline E Lewis
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Ruiwei Jing
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Onella Charles
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Shudong Zhang
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Amy Lin
- Department of Radiology, St. Michael's Hospital , Toronto, ON , Canada
| | - Simon J Graham
- Sunnybrook Research Institute, University of Toronto , Toronto, ON , Canada
| | - Tom A Schweizer
- Department of Neurosurgery, St. Michael's Hospital , Toronto, ON , Canada
| | - Aditya Bharatha
- Department of Medical Imaging, St. Michael's Hospital, University of Toronto, Toronto, ON, Canada; Department of Medical Imaging and Neurosurgery at the University of Toronto, Toronto, ON, Canada
| | - Michael D Cusimano
- Department of Neurosurgery, St. Michael's Hospital, Toronto, ON, Canada; Faculty of Medicine, Department of Surgery, Division of Neurosurgery, University of Toronto, Toronto, ON, Canada
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193
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Aging of cerebral white matter. Ageing Res Rev 2017; 34:64-76. [PMID: 27865980 DOI: 10.1016/j.arr.2016.11.006] [Citation(s) in RCA: 161] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Revised: 10/21/2016] [Accepted: 11/04/2016] [Indexed: 12/12/2022]
Abstract
White matter (WM) occupies a large volume of the human cerebrum and is mainly composed of myelinated axons and myelin-producing glial cells. The myelinated axons within WM are the structural foundation for efficient neurotransmission between cortical and subcortical areas. Similar to neuron-enriched gray matter areas, WM undergoes a series of changes during the process of aging. WM malfunction can induce serious neurobehavioral and cognitive impairments. Thus, age-related changes in WM may contribute to the functional decline observed in the elderly. In addition, aged WM becomes more susceptible to neurological disorders, such as stroke, traumatic brain injury (TBI), and neurodegeneration. In this review, we summarize the structural and functional alterations of WM in natural aging and speculate on the underlying mechanisms. We also discuss how age-related WM changes influence the progression of various brain disorders, including ischemic and hemorrhagic stroke, TBI, Alzheimer's disease, and Parkinson's disease. Although the physiology of WM is still poorly understood relative to gray matter, WM is a rational therapeutic target for a number of neurological and psychiatric conditions.
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194
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Longitudinal segmentation of age-related white matter hyperintensities. Med Image Anal 2017; 38:50-64. [PMID: 28282640 DOI: 10.1016/j.media.2017.02.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 02/13/2017] [Accepted: 02/15/2017] [Indexed: 01/18/2023]
Abstract
Although white matter hyperintensities evolve in the course of ageing, few solutions exist to consider the lesion segmentation problem longitudinally. Based on an existing automatic lesion segmentation algorithm, a longitudinal extension is proposed. For evaluation purposes, a longitudinal lesion simulator is created allowing for the comparison between the longitudinal and the cross-sectional version in various situations of lesion load progression. Finally, applied to clinical data, the proposed framework demonstrates an increased robustness compared to available cross-sectional methods and findings are aligned with previously reported clinical patterns.
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195
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Urra X, Laredo C, Zhao Y, Amaro S, Rudilosso S, Renú A, Prats-Galino A, Planas AM, Oleaga L, Chamorro Á. Neuroanatomical correlates of stroke-associated infection and stroke-induced immunodepression. Brain Behav Immun 2017; 60:142-150. [PMID: 27742582 DOI: 10.1016/j.bbi.2016.10.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/06/2016] [Accepted: 10/08/2016] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Infections represent the most frequent medical complications in stroke patients. Their main determinants are dysphagia and a transient state of immunodepression. We analyzed whether distinct anatomical brain regions were associated with the occurrence of stroke-associated infections or immunodepression. MATERIALS AND METHODS In 106 patients with acute ischemic stroke, we evaluated the incidence of pneumonia, urinary tract infection, or other infections together with the characterization of biomarkers of immunodepression. Twenty control subjects served to provide reference values. Using voxel-based lesion-symptom mapping, the involvement of gray and white matter structures was correlated with clinical and laboratory findings in crude analyses and in volume adjusted models to rule out associations reflecting differences in the size of the infarction. RESULTS Stroke-associated infection occurred in 22 (21%) patients and prevailed in patients with larger infarcts. Volume adjusted voxel-based lesion-symptom mapping revealed the involvement of the superior and middle temporal gyri, the orbitofrontal cortex, the superior longitudinal fasciculus and the inferior fronto-occipital fasciculus amongst infected patients. These associations were similar for pneumonia but not for urinary tract infections. Lymphopenia was associated with lesions of the superior and middle temporal gyri. Laterality did not influence stroke-associated infections or the presence of immunodepressive traits after volume control. The greatest overlap in the neuroanatomical correlates occurred between pneumonia and dysphagia. CONCLUSION Infarct volume plays a relevant role in the occurrence of stroke-associated infections, but lesions in specific brain locations such as the superior and lateral temporal lobe and the orbitofrontal cortex are also associated with increased infectious risk, especially pneumonia.
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Affiliation(s)
- Xabier Urra
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain.
| | - Carlos Laredo
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain
| | - Yashu Zhao
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain
| | - Sergio Amaro
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Salvatore Rudilosso
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain
| | - Arturo Renú
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain
| | - Alberto Prats-Galino
- Laboratory of Surgical NeuroAnatomy, School of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Anna M Planas
- Institut d'Investigacions Biomèdiques de Barcelona, Consejo Superior de Investigaciones Científicas, Barcelona, Spain
| | - Laura Oleaga
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Ángel Chamorro
- Functional Unit of Cerebrovascular Diseases, Hospital Clinic, Barcelona, Spain; Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain; Medicine Department, School of Medicine, Universitat de Barcelona, Barcelona, Spain
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196
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Tsai PH, Chou MC, Chiang SW, Chung HW, Liu HS, Kao HW, Chen CY. Early white matter injuries in patients with acute carbon monoxide intoxication: A tract-specific diffusion kurtosis imaging study and STROBE compliant article. Medicine (Baltimore) 2017; 96:e5982. [PMID: 28151889 PMCID: PMC5293452 DOI: 10.1097/md.0000000000005982] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Evaluation of acute white matter injuries caused by carbon monoxide (CO) poisoning can be limited by conventional magnetic resonance (MR) imaging. We aim to evaluate the feasibility of diffusion kurtosis imaging (DKI) for early detection of white matter alterations in patients with acute CO intoxication.A total of 30 subjects including 15 acute CO patients and 15 age- and sex-matched healthy volunteers were enrolled in this study. MR examinations were performed on a 3T MR scanner within 8 days after CO intoxication. DKI data were acquired to derive axial, radial, and mean kurtosis, as well as fractional anisotropy (FA), axial, radial, and mean diffusivity for tract-specific comparisons between the 2 groups.Significant decreases of mean kurtosis were shown in the genu of corpus callosum, cingulum, and motor-related tracts (corticospinal and corticobulbar tracts) in patients with acute CO intoxication as compared with controls. On the contrary, significant differences of FA values were merely shown in the regions of corticospinal tracts.DKI demonstrated comparably stronger potential than diffusion tensor imaging in terms of early detection of white matter changes in patients with acute CO intoxication. This may have implications in therapeutic strategy for managing acute CO intoxication patients.
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Affiliation(s)
- Ping-Huei Tsai
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University
- Translational Imaging Research Center
- Department of Medical Imaging, Taipei Medical University Hospital, Taipei Medical University, Taipei
| | - Ming-Chung Chou
- Department of Medical Imaging and Radiological Sciences, Kaohsiung Medical University, Kaohsiung
| | - Shih-Wei Chiang
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center
| | - Hsiao-Wen Chung
- Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University
| | - Hua-Shan Liu
- Translational Imaging Research Center
- Department of Medical Imaging, Taipei Medical University Hospital, Taipei Medical University, Taipei
- School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan
| | - Hung-Wen Kao
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center
| | - Cheng-Yu Chen
- Department of Radiology, School of Medicine, College of Medicine, Taipei Medical University
- Translational Imaging Research Center
- Department of Medical Imaging, Taipei Medical University Hospital, Taipei Medical University, Taipei
- Department of Radiology, Tri-Service General Hospital and National Defense Medical Center
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197
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Liu J, Liang P, Yin L, Shu N, Zhao T, Xing Y, Li F, Zhao Z, Li K, Han Y. White Matter Abnormalities in Two Different Subtypes of Amnestic Mild Cognitive Impairment. PLoS One 2017; 12:e0170185. [PMID: 28107493 PMCID: PMC5249194 DOI: 10.1371/journal.pone.0170185] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 12/30/2016] [Indexed: 12/04/2022] Open
Abstract
White matter (WM) degeneration has been found during the course of cognitive decline in both Alzheimer's disease (AD) and amnestic mild cognitive impairment (aMCI), however, it is unclear whether there are different WM microstructural abnormalities between two subtypes of aMCI, including single domain aMCI (aMCI-s) and multiple domain aMCI (aMCI-m). Thirty-two patients of aMCI single-domain (aMCI-s), twenty-three patients of aMCI multiple-domain (aMCI-m) and twenty-three healthy normal controls (NC) participated in this study. Neuropsychological measures and diffusion tensor imaging (DTI) data were acquired from each subject and tract-based spatial statistics (TBSS) was implemented. It was found that both aMCI groups showed significantly reduced fractional anisotropy (FA) in the right superior longitudinal fasciculus (SLF) than NC. It was also identified that, as compared to aMCI-m, aMCI-s showed significantly decreased FA in the left SLF, left uncinate fasciculus (UF) and left inferior longitudinal fasciculus (ILF), while significantly increased FA in the left anterior thalamic radiation (ATR). The correlation analysis showed that FA values in the regions with group difference were significantly correlated with cognitive functions as measured by Boston naming test and trail making test. These results suggested that the variations of aMCI may be differentiated by FA indexes and DTI may help to understand why specific signs and symptoms occur in patients.
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Affiliation(s)
- Jianghong Liu
- Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Peipeng Liang
- Department of Radiology, Xuan Wu Hospital, Capital Medical University, Beijing, China.,Beijing Key Lab of MRI and Brain Informatics, Beijing, China
| | - Linlin Yin
- Department of Pharmacology, Xuan Wu Hospital, Capital Medical University, Beijing Geriatric Medical Research Center, Key Laboratory for Neurodegenerative Disease of Ministry of Education, Beijing, China
| | - Ni Shu
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Tengda Zhao
- State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
| | - Yi Xing
- Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Fangyu Li
- Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Zhilian Zhao
- Department of Radiology, Xuan Wu Hospital, Capital Medical University, Beijing, China
| | - Kuncheng Li
- Department of Radiology, Xuan Wu Hospital, Capital Medical University, Beijing, China.,Beijing Key Lab of MRI and Brain Informatics, Beijing, China
| | - Ying Han
- Department of Neurology, Xuan Wu Hospital, Capital Medical University, Beijing, China.,Center of Alzheimer's Disease, Beijing Institute for Brain Disorders, Beijing, China
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198
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Boy N, Mühlhausen C, Maier EM, Heringer J, Assmann B, Burgard P, Dixon M, Fleissner S, Greenberg CR, Harting I, Hoffmann GF, Karall D, Koeller DM, Krawinkel MB, Okun JG, Opladen T, Posset R, Sahm K, Zschocke J, Kölker S. Proposed recommendations for diagnosing and managing individuals with glutaric aciduria type I: second revision. J Inherit Metab Dis 2017; 40:75-101. [PMID: 27853989 DOI: 10.1007/s10545-016-9999-9] [Citation(s) in RCA: 131] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 10/18/2016] [Accepted: 10/19/2016] [Indexed: 10/20/2022]
Abstract
Glutaric aciduria type I (GA-I; synonym, glutaric acidemia type I) is a rare inherited metabolic disease caused by deficiency of glutaryl-CoA dehydrogenase located in the catabolic pathways of L-lysine, L-hydroxylysine, and L-tryptophan. The enzymatic defect results in elevated concentrations of glutaric acid, 3-hydroxyglutaric acid, glutaconic acid, and glutaryl carnitine in body tissues, which can be reliably detected by gas chromatography/mass spectrometry (organic acids) and tandem mass spectrometry (acylcarnitines). Most untreated individuals with GA-I experience acute encephalopathic crises during the first 6 years of life that are triggered by infectious diseases, febrile reaction to vaccinations, and surgery. These crises result in striatal injury and consequent dystonic movement disorder; thus, significant mortality and morbidity results. In some patients, neurologic disease may also develop without clinically apparent crises at any age. Neonatal screening for GA-I us being used in a growing number of countries worldwide and is cost effective. Metabolic treatment, consisting of low lysine diet, carnitine supplementation, and intensified emergency treatment during catabolism, is effective treatment and improves neurologic outcome in those individuals diagnosed early; treatment after symptom onset, however, is less effective. Dietary treatment is relaxed after age 6 years and should be supervised by specialized metabolic centers. The major aim of this second revision of proposed recommendations is to re-evaluate the previous recommendations (Kölker et al. J Inherit Metab Dis 30:5-22, 2007b; J Inherit Metab Dis 34:677-694, 2011) and add new research findings, relevant clinical aspects, and the perspective of affected individuals.
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Affiliation(s)
- Nikolas Boy
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany.
| | - Chris Mühlhausen
- University Children's Hospital, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246, Hamburg, Germany
| | - Esther M Maier
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University of Munich, University of Munich Medical Centre, Munich, Germany
| | - Jana Heringer
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Birgit Assmann
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Peter Burgard
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Marjorie Dixon
- Dietetics, Great Ormond Street Hospital for Children, NHS Foundation Trust, London, UK
| | - Sandra Fleissner
- Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University of Munich, University of Munich Medical Centre, Munich, Germany
| | - Cheryl R Greenberg
- Department of Pediatrics, Children's Hospital Health Sciences Centre and University of Manitoba, Winnipeg, MB, R3A 1R9, Canada
- Department of Biochemistry and Medical Genetics, Children's Hospital Health Sciences Centre and University of Manitoba, Winnipeg, MB, R3A 1R9, Canada
| | - Inga Harting
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
- Department of Neuroradiology, University Hospital Heidelberg, Heidelberg, Germany
| | - Georg F Hoffmann
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Daniela Karall
- Clinic for Paediatrics I, Inherited Metabolic Disorders, Medical, University of Innsbruck, Innsbruck, Austria
| | - David M Koeller
- Department of Molecular & Medical Genetics, Oregon Health & Science University, Portland, OR, USA
| | - Michael B Krawinkel
- Justus Liebig University Giessen, Institute of Nutritional Science, Giessen, Germany
| | - Jürgen G Okun
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Thomas Opladen
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Roland Posset
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Katja Sahm
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
| | - Johannes Zschocke
- Division of Human Genetics, Medical University Innsbruck, Innsbruck, Austria
| | - Stefan Kölker
- Centre for Child and Adolescent Medicine, Department of General Paediatrics, Division of Neuropaediatrics and Metabolic Medicine, University Hospital Heidelberg, Im Neuenheimer Feld 430, D-69120, Heidelberg, Germany
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199
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Oshima H, Shiga T, Niwa SI, Enomoto H, Ugawa Y, Yabe H. Alteration of Duration Mismatch Negativity Induced by Transcranial Magnetic Stimulation Over the Left Parietal Lobe. Clin EEG Neurosci 2017; 48:11-19. [PMID: 26873935 DOI: 10.1177/1550059416630483] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 01/02/2016] [Accepted: 01/04/2016] [Indexed: 11/17/2022]
Abstract
Mismatch negativity (MMN) is generated by a comparison between an incoming sound and the memory trace of preceding sounds stored in sensory memory without any attention to the sound. N100 (N1) is associated with the afferent response to sound onset and reflects early analysis of stimulus characteristics. MMN generators are present in the temporal and frontal lobe, and N1 generators are present in the temporal lobe. The parietal lobe is involved in MMN generation elicited by a change in duration. The anatomical network connecting these areas, lateralization, and the effect of the side of ear stimulation on MMN remain unknown. Thus, we studied the effects of low-frequency repetitive transcranial magnetic stimulation (rTMS) over the left parietal lobe on MMN and N1 in 10 healthy subjects. Low-frequency rTMS over the left parietal lobe decreased the amplitude of MMN following right ear sound stimulation, but the amplitude was unaffected with left ear sound stimulation. We observed no significant changes in the amplitude of N1 or the latency of MMN or N1. These results suggest that low-frequency rTMS over the left parietal lobe modulates the detection of early auditory changes in duration in healthy subjects. Stimulation that is contralateral to the side of the ear experiencing sound may affect the generation of duration MMN more than ipsilateral stimulation.
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Affiliation(s)
- Hirokazu Oshima
- Department of Neuropsychiatry, Fukushima Medical University, Fukushima, Japan
| | - Tetsuya Shiga
- Department of Neuropsychiatry, Fukushima Medical University, Fukushima, Japan
| | - Shin-Ichi Niwa
- Department of Neuropsychiatry, Fukushima Medical University, Fukushima, Japan
| | - Hiroyuki Enomoto
- Department of Neurology, Fukushima Medical University, Fukushima, Japan
| | - Yoshikazu Ugawa
- Department of Neurology, Fukushima Medical University, Fukushima, Japan
| | - Hirooki Yabe
- Department of Neuropsychiatry, Fukushima Medical University, Fukushima, Japan
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200
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Carter AR, McAvoy MP, Siegel JS, Hong X, Astafiev SV, Rengachary J, Zinn K, Metcalf NV, Shulman GL, Corbetta M. Differential white matter involvement associated with distinct visuospatial deficits after right hemisphere stroke. Cortex 2016; 88:81-97. [PMID: 28081452 DOI: 10.1016/j.cortex.2016.12.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 07/07/2016] [Accepted: 12/08/2016] [Indexed: 02/05/2023]
Abstract
Visuospatial attention depends on the integration of multiple processes, and people with right hemisphere lesions after a stroke may exhibit severe or no visuospatial deficits. The anatomy of core components of visuospatial attention is an area of intense interest. Here we examine the relationship between the disruption of core components of attention and lesion distribution in a heterogeneous group (N = 70) of patients with right hemisphere strokes regardless of the presence of clinical neglect. Deficits of lateralized spatial orienting, measured as the difference in reaction times for responding to visual targets in the contralesional or ipsilesional visual field, and deficits in re-orienting attention, as measured by the difference in reaction times for invalidly versus validly cued targets, were measured using a computerized spatial orienting task. Both measures were related through logistic regression and a novel ridge regression method to anatomical damage measured with magnetic resonance imaging. While many regions were common to both deficit maps, a deficit in lateralized spatial orienting was more associated with lesions in the white matter underlying the posterior parietal cortex, and middle and inferior frontal gyri. A deficit in re-orienting of attention toward unattended locations was associated with lesions in the white matter of the posterior parietal cortex, insular cortex and less so with white matter involvement of the anterior frontal lobe. An hodological analysis also supports this partial dissociation between the white matter tracts that are damaged in lateralized spatial biases versus impaired re-orienting. Our results underscore that the integrity of fronto-parietal white matter tracts is crucial for visuospatial attention and that different attention components are mediated by partially distinct neuronal substrates.
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Affiliation(s)
- Alex R Carter
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA.
| | - Mark P McAvoy
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Joshua S Siegel
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Xin Hong
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Serguei V Astafiev
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Jennifer Rengachary
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kristi Zinn
- Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Nicholas V Metcalf
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Gordon L Shulman
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Maurizio Corbetta
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA; Department of Radiology, Washington University School of Medicine, St. Louis, MO, USA; Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, MO, USA
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