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Corpus callosum development

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https://www.readbyqxmd.com/read/29320530/the-amyloid-precursor-protein-derivative-app96-110-is-efficacious-following-intravenous-administration-after-traumatic-brain-injury
#1
Stephanie L Plummer, Frances Corrigan, Emma Thornton, Joshua A Woenig, Robert Vink, Roberto Cappai, Corinna Van Den Heuvel
Following traumatic brain injury (TBI) neurological damage is ongoing through a complex cascade of primary and secondary injury events in the ensuing minutes, days and weeks. The delayed nature of secondary injury provides a valuable window of opportunity to limit the consequences with a timely treatment. Recently, the amyloid precursor protein (APP) and its derivative APP96-110 have shown encouraging neuroprotective activity following TBI following an intracerebroventricular administration. Nevertheless, its broader clinical utility would be enhanced by an intravenous (IV) administration...
2018: PloS One
https://www.readbyqxmd.com/read/29315514/cytotoxic-edema-at-onset-in-west-syndrome-of-unknown-etiology-a-longitudinal-diffusion-tensor-imaging-study
#2
Chikako Ogawa, Hiroyuki Kidokoro, Tatsuya Fukasawa, Hiroyuki Yamamoto, Naoko Ishihara, Yuji Ito, Yoko Sakaguchi, Yu Okai, Atsuko Ohno, Tomohiko Nakata, Yoshiteru Azuma, Ayako Hattori, Tetsuo Kubota, Takeshi Tsuji, Akihiro Hirakawa, Hisashi Kawai, Jun Natsume
OBJECTIVE: To clarify longitudinal changes in white matter microstructures from the onset of disease in patients with West syndrome (WS) of unknown etiology. METHODS: Diffusion tensor imaging (DTI) was prospectively performed at onset and at 12 and 24 months old in 17 children with WS of unknown etiology. DTI was analyzed using tract-based spatial statistics (TBSS) and tract-specific analysis (TSA) of 13 fiber tracts, and fractional anisotropy (FA) and mean diffusivity (MD) were compared with those of 42 age-matched controls...
January 8, 2018: Epilepsia
https://www.readbyqxmd.com/read/29285982/effects-of-veliparib-on-microglial-activation-and-functional-outcomes-following-traumatic-brain-injury-in-the-rat-and-pig
#3
Karen Irvine, Robin Bishop, Seok Joon Won, Jianguo Xu, Katherine Hamel, Valerie Coppes, Pardeep Singh, Andrew Sondag, Eric Rome, Jayinee Basu, Giordano Santos, S Scott Panter, Raymond Swanson
The inflammation response induced by brain trauma can impair recovery. This response requires several hours to fully develop, and thus provides a clinically relevant therapeutic window of opportunity. Poly(ADP-ribose) polymerase inhibitors suppress inflammatory responses, including brain microglial activation. Here we evaluated delayed treatment with veliparib, a poly(ADP-ribose) polymerase inhibitor currently in clinical trials as a cancer therapeutic, in rats and pigs subjected to controlled cortical impact (CCI)...
December 29, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29279026/cortical-visual-connections-via-the-corpus-callosum-are-asymmetrical-in-human-infantile-esotropia
#4
Marcel P M Ten Tusscher, Anne Cees Houtman, Johan De Mey, Peter Van Schuerbeek
PURPOSE: Besides chiasmal hemidecussation, interhemispheric connections are likely important in human binocularity. The corpus callosum (CC) is the major fiber bundle in the mammalian brain which mostly connects homologous cortical areas in the two hemispheres. Visual interhemispheric connections were found abnormal in strabismic cats. No studies have investigated these pathways in humans with infantile strabismus. METHODS: Diffusion tensor imaging was used in four subjects with infantile esotropia (IE) and nine control subjects with normal binocularity, in order to study interhemispheric fibers in the CC connecting the right and left primary visual cortical areas...
December 26, 2017: Strabismus
https://www.readbyqxmd.com/read/29277719/miniature-pig-model-of-human-adolescent-brain-white-matter-development
#5
Meghann C Ryan, Paul Sherman, Laura M Rowland, S Andrea Wijtenburg, Ashley Acheson, Els Fieremans, Jelle Veraart, Dmitry Novikov, L Elliot Hong, John Sladky, P Dana Peralta, Peter Kochunov, Stephen A McGuire
BACKGROUND: Neuroscience research in brain development and disorders can benefit from an in vivo animal model that portrays normal white matter (WM) development trajectories and has a sufficiently large cerebrum for imaging with human MRI scanners and protocols. NEW METHOD: Twelve three-month-old Sinclair™ miniature pigs (Sus scrofa domestica) were longitudinally evaluated during adolescent development using advanced diffusion weighted imaging (DWI) focused on cerebral WM...
December 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29260614/neuroimaging-findings-in-pallister-killian-syndrome
#6
Emil Jernstedt Barkovich, Tarannum Musvee Lateef, Matthew T Whitehead
Pallister-Killian syndrome (PKS) is a rare chromosomal duplication disorder caused by additional copies of the short arm of chromosome 12 (12p). Clinically PKS is characterized by craniofacial dysmorphism with neonatal frontotemporal alopecia, hypertelorism, and low-set ears as well as kyphoscoliosis, severe intellectual disability, epilepsy, and abnormal muscle tone. Comprehensive high-resolution brain MR findings of PKS in childhood have not been previously illustrated in the medical literature. We present detailed neuroimaging findings from a child with PKS and thoroughly review previously reported structural brain abnormalities in this patient population...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/29249344/computational-methods-for-corpus-callosum-segmentation-on-mri-a-systematic-literature-review
#7
REVIEW
G S Cover, W G Herrera, M P Bento, S Appenzeller, L Rittner
BACKGROUND AND OBJECTIVE: The corpus callosum (CC) is the largest white matter structure in the brain and has a significant role in central nervous system diseases. Its volume correlates with the severity and/or extent of neurodegenerative disease. Even though the CC's role has been extensively studied over the last decades, and different algorithms and methods have been published regarding CC segmentation and parcellation, no reviews or surveys covering such developments have been reported so far...
February 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29244803/changes-in-brain-morphology-and-microstructure-in-relation-to-early-brain-activity-in-extremely-preterm-infants
#8
Maria Luisa Tataranno, Nathalie H P Claessens, Pim Moeskops, Mona C Toet, Karina J Kersbergen, Giuseppe Buonocore, Ivana Išgum, Alexander Leemans, Serena Counsell, Floris Groenendaal, Linda S de Vries, Manon J N L Benders
OBJECTIVE: To investigate the relation of early brain activity with structural (growth of the cortex and cerebellum) and white matter microstructural brain development. METHODS: 33 preterm neonates (gestational age 26±1 weeks) without major brain abnormalities were continuously monitored with electroencephalography (EEG) during the first 48 h of life. Rate of spontaneous activity transients per minute (SAT rate) and interSAT interval (ISI) in seconds per minute were calculated...
December 15, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29239330/expression-of-ng2-and-platelet-derived-growth-factor-receptor-alpha-in-the-developing-neonatal-rat-brain
#9
Ping Li, Heng-Xi Li, Hong-Yan Jiang, Lie Zhu, Hai-Ying Wu, Jin-Tao Li, Jiang-Hua Lai
Platelet-derived growth factor receptor alpha (PDGFRα) is a marker of oligodendrocyte precursor cells in the central nervous system. NG2 is also considered a marker of oligodendrocyte precursor cells. However, whether there are differences in the distribution and morphology of oligodendrocyte precursor cells labeled by NG2 or PDGFRα in the developing neonatal rat brain remains unclear. In this study, by immunohistochemical staining, NG2 positive (NG2+) cells were ubiquitous in the molecular layer, external pyramidal layer, internal pyramidal layer, and polymorphic layer of the cerebral cortex, and corpus callosum, external capsule, piriform cortex, and medial septal nucleus...
November 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29232635/symptom-recovery-and-relationship-to-structure-of-corpus-callosum-in-individuals-with-an-at-risk-mental-state
#10
Naoyuki Katagiri, Christos Pantelis, Takahiro Nemoto, Naohisa Tsujino, Junichi Saito, Masaaki Hori, Taiju Yamaguchi, Tomoyuki Funatogawa, Masafumi Mizuno
Previous studies have revealed that changes in sub-threshold psychotic symptoms observed in individuals with an 'at risk mental state' (ARMS) are associated with biological changes in the corpus callosum (CC). To elucidate the biological background for resilience against transition to psychosis, we investigated the relationship between CC structural changes and recovery of sub-threshold psychotic symptom in subjects with ARMS who did not develop psychosis (ARMS-N). Sixteen healthy controls and 42 ARMS (37 ARMS-N) subjects participated this study...
November 29, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/29229580/detecting-white-matter-activity-using-conventional-3-tesla-fmri-an-evaluation-of-standard-field-strength-and-hemodynamic-response-function
#11
Matthew J Courtemanche, Carolyn J Sparrey, Xiaowei Song, Alex MacKay, Ryan C N D'Arcy
Detection of functional magnetic resonance imaging (fMRI) activation in white matter has been increasingly reported despite historically being controversial. Much of the development work to-date has used high-field 4 T MRI and specialized pulse sequences. In the current study, we utilized conventional 3 T MRI and a commonly applied gradient-echo-planar imaging sequence to evaluate white matter (WM) fMRI sensitivity within a common framework. Functional WM activity was replicated in target regions of interest within the corpus callosum, at the group and individual levels...
December 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/29228390/altered-brain-morphology-after-focal-radiation-reveals-impact-of-off-target-effects-implications-for-white-matter-development-and-neurogenesis
#12
Kiran G Beera, Yu-Qing Li, Jun Dazai, James Stewart, Shannon Egan, Mashal Ahmed, C Shun Wong, David A Jaffray, Brian J Nieman
Background: Children with brain tumors treated with cranial radiation therapy (RT) often exhibit cognitive late effects, commonly associated with reduced white matter (WM) volume and decreased neurogenesis. The impact of radiation damage in particular regions or tissues on brain development as a whole has not been elucidated. Methods: We delivered whole-brain or focal radiation (8 Gy single dose) to infant mice. Focal treatments targeted white matter (anterior commissure), neuronal (olfactory bulbs), or neurogenic (subventricular zone) regions...
November 2, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/29226520/a-novel-homozygous-slc25a1-mutation-with-impaired-mitochondrial-complex-v-possible-phenotypic-expansion
#13
Idan Cohen, Orna Staretz-Chacham, Ohad Wormser, Yonatan Perez, Ann Saada, Rotem Kadir, Ohad S Birk
SLC25A1 mutations are associated with combined D,L-2-hydroxyglutaric aciduria (DL- 2HGA; OMIM #615182), characterized by muscular hypotonia, severe neurodevelopmental dysfunction and intractable seizures. SLC25A1 encodes the mitochondrial citrate carrier (CIC), which mediates efflux of the mitochondrial tricarboxylic acid (TCA) cycle intermediates citrate and isocitrate in exchange for cytosolic malate. Only a single family with an SLC25A1 mutation has been described in which mitochondrial respiratory chain dysfunction was documented, specifically in complex IV...
December 11, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/29222831/a-review-of-structural-brain-abnormalities-in-pallister-killian-syndrome
#14
Cathryn Poulton, Gareth Baynam, Clarissa Yates, Hamid Alinejad-Rokny, Simon Williams, Helen Wright, Karen J Woodward, Soruba Sivamoorthy, Joanne Peverall, Peter Shipman, David Ravine, John Beilby, Julian Ik-Tsen Heng
BACKGROUND: Pallister-Killian syndrome (PKS) is a rare multisystem developmental syndrome usually caused by mosaic tetrasomy of chromosome 12p that is known to be associated with neurological defects. METHODS: We describe two patients with PKS, one of whom has bilateral perisylvian polymicrogyria (PMG), the other with macrocephaly, enlarged lateral ventricles and hypogenesis of the corpus callosum. We have also summarized the current literature describing brain abnormalities in PKS...
December 9, 2017: Molecular Genetics & Genomic Medicine
https://www.readbyqxmd.com/read/29216635/deficits-in-docosahexaenoic-acid-accrual-during-adolescence-reduce-rat-forebrain-white-matter-microstructural-integrity-an-in-vivo-diffusion-tensor-imaging-study
#15
Robert K McNamara, Jennifer D Schurdak, Ruth H Asch, Bart D Peters, Diana M Lindquist
Neuropsychiatric disorders that frequently initially emerge during adolescence are associated with deficits in the omega-3 (n-3) fatty acid docosahexaenoic acid (DHA), elevated proinflammatory signaling, and regional reductions in white matter integrity (WMI). This study determined the effects of altering brain DHA accrual during adolescence on WMI in the rat brain by diffusion tensor imaging (DTI), and investigated the potential mediating role of proinflammatory signaling. During periadolescent development, male rats were fed a diet deficient in n-3 fatty acids (DEF, n = 20), a fish oil-fortified diet containing preformed DHA (FO, n = 20), or a control diet (CON, n = 20)...
December 8, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/29212949/early-pridopidine-treatment-improves-behavioral-and-transcriptional-deficits-in-yac128-huntington-disease-mice
#16
Marta Garcia-Miralles, Michal Geva, Jing Ying Tan, Nur Amirah Binte Mohammad Yusof, Yoonjeong Cha, Rebecca Kusko, Liang Juin Tan, Xiaohong Xu, Iris Grossman, Aric Orbach, Michael R Hayden, Mahmoud A Pouladi
Pridopidine is currently under clinical development for Huntington disease (HD), with on-going studies to better characterize its therapeutic benefit and mode of action. Pridopidine was administered either prior to the appearance of disease phenotypes or in advanced stages of disease in the YAC128 mouse model of HD. In the early treatment cohort, animals received 0, 10, or 30 mg/kg pridopidine for a period of 10.5 months. In the late treatment cohort, animals were treated for 8 weeks with 0 mg/kg or an escalating dose of pridopidine (10 to 30 mg/kg over 3 weeks)...
December 7, 2017: JCI Insight
https://www.readbyqxmd.com/read/29209266/current-opportunities-for-clinical-monitoring-of-axonal-pathology-in-traumatic-brain-injury
#17
REVIEW
Parmenion P Tsitsopoulos, Sami Abu Hamdeh, Niklas Marklund
Traumatic brain injury (TBI) is a multidimensional and highly complex disease commonly resulting in widespread injury to axons, due to rapid inertial acceleration/deceleration forces transmitted to the brain during impact. Axonal injury leads to brain network dysfunction, significantly contributing to cognitive and functional impairments frequently observed in TBI survivors. Diffuse axonal injury (DAI) is a clinical entity suggested by impaired level of consciousness and coma on clinical examination and characterized by widespread injury to the hemispheric white matter tracts, the corpus callosum and the brain stem...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29201279/mapping-age-effects-along-fiber-tracts-in-young-adults
#18
Emily L Dennis, Faisal Rashid, Josh Faskowitz, Yan Jin, Katie L McMahon, Greig I de Zubicaray, Nicholas G Martin, Ian B Hickie, Margaret J Wright, Neda Jahanshad, Paul M Thompson
Brain development is a protracted and dynamic process. Many studies have charted the trajectory of white matter development, but here we sought to map these effects in greater detail, based on a large set of fiber tracts automatically extracted from HARDI (high angular resolution diffusion imaging) at 4 tesla. We used autoMATE (automated multi-atlas tract extraction) to extract diffusivity measures along 18 of the brain's major fiber bundles in 667 young adults, aged 18-30. We examined linear and non-linear age effects on diffusivity measures, pointwise along tracts...
2017: Proceedings of the IEEE International Symposium on Biomedical Imaging: from Nano to Macro
https://www.readbyqxmd.com/read/29200540/a-functional-varying-coefficient-single-index-model-for-functional-response-data
#19
Jialiang Li, Chao Huang, Hongtu Zhu
Motivated by the analysis of imaging data, we propose a novel functional varying-coefficient single index model (FVCSIM) to carry out the regression analysis of functional response data on a set of covariates of interest. FVCSIM represents a new extension of varying-coefficient single index models for scalar responses collected from cross-sectional and longitudinal studies. An efficient estimation procedure is developed to iteratively estimate varying coefficient functions, link functions, index parameter vectors, and the covariance function of individual functions...
2017: Journal of the American Statistical Association
https://www.readbyqxmd.com/read/29199884/congenital-cavitary-optic-disc-anomaly-and-axenfeld-s-anomaly-in-wolf-hirschhorn-syndrome-a-case-report-and-review-of-the-literature
#20
Mohsin H Ali, Nathalie F Azar, Vinay Aakalu, Felix Y Chau, Javaneh Abbasian, Pete Setabutr, Irene H Maumenee
BACKGROUND: Wolf-Hirschhorn syndrome is a rare genetic syndrome caused by a heterozygous deletion on chromosome 4p16.3 and is characterized by a "Greek warrior helmet" facies, hypotonia, developmental delay, seizures, structural central nervous system defects, intrauterine growth restriction, sketelal anomalies, cardiac defects, abnormal tooth development, and hearing loss. A variety of ocular manifestations may occur in up to 40% of patients. MATERIALS/METHODS: We report the genetic testing results, systemic findings, and complete ophthalmologic examination findings in a patient with Wolf-Hirschhorn syndrome, including external photography, RetCam3 (Clarity Medical Systems, Pleasonton, CA) goniography, and fundus photography...
December 4, 2017: Ophthalmic Genetics
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