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排序方式: 共有72条查询结果,搜索用时 15 毫秒
1.
Helmut Butzkueven 《Journal of clinical neuroscience》2013,20(2):312-313
The case report that is the subject of this Commentary describes a 27-year-old woman, who, 3 months after a devastating low cervical myelitis, underwent intrathecal mesenchymal stem cell (MSC) infusions. Six hours after the third infusion, she became unconscious, febrile and cerebral MRI showed acute bitemporal and left cerebellar lesions, consistent with an acute disseminated encephalomyelitis. It is likely that this is the first reported patient with neuroinflammatory exacerbation after MSC therapy. This case suggests that, in addition to their malignant potential, autologous MSC expanded in vitro can exhibit immune-activating properties leading to autoimmune exacerbation. 相似文献
2.
Ceruloplasmin gene‐deficient mice with experimental autoimmune encephalomyelitis show attenuated early disease evolution
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Melissa M. Gresle Katrin Schulz Anna Jonas Victoria M. Perreau Tania Cipriani Alan G. Baxter Socorro Miranda‐Hernandez Judith Field Vilija G. Jokubaitis Robert Cherny Irene Volitakis Samuel David Helmut Butzkueven 《Journal of neuroscience research》2014,92(6):732-742
We conducted a microarray study to identify genes that are differentially regulated in the spinal cords of mice with the inflammatory disease experimental autoimmune encephalomyelitis (EAE) relative to healthy mice. In total 181 genes with at least a two‐fold increase in expression were identified, and most of these genes were associated with immune function. Unexpectedly, ceruloplasmin (Cp), a ferroxidase that converts toxic ferrous iron to its nontoxic ferric form and also promotes the efflux of iron from astrocytes in the CNS, was shown to be highly upregulated (13.2‐fold increase) in EAE spinal cord. Expression of Cp protein is known to be increased in several neurological conditions, but the role of Cp regulation in CNS autoimmune disease is not known. To investigate this, we induced EAE in Cp gene knockout, heterozygous, and wild‐type mice. Cp knockout mice were found to have slower disease evolution than wild‐type mice (EAE days 13–17; P = 0.05). Interestingly, Cp knockout mice also exhibited a significant increase in the number of astrocytes with reactive morphology in early EAE compared with wild‐type mice at the same stage of disease. CNS iron levels were not increased with EAE in these mice. Based on these observations, we propose that an increase in Cp expression could contribute to tissue damage in early EAE. In addition, endogenous CP either directly or indirectly inhibits astrocyte reactivity during early disease, which could also worsen early disease evolution. © 2014 Wiley Periodicals, Inc. 相似文献
3.
Treatment of experimental autoimmune encephalomyelitis with antisense oligonucleotides against the low affinity neurotrophin receptor 总被引:2,自引:0,他引:2
Soilu-Hänninen M Epa R Shipham K Butzkueven H Bucci T Barrett G Bartlett PF Kilpatrick TJ 《Journal of neuroscience research》2000,59(6):712-721
Upregulated expression of the low-affinity neurotrophin receptor (p75) in the central nervous system (CNS) during experimental autoimmune encephalomyelitis (EAE) has recently been demonstrated. To investigate whether p75 plays a role in disease pathogenesis, we adopted a gene therapy approach, utilizing antisense oligonucleotides to downregulate p75 expression during EAE. Phosphorothioate antisense oligonucleotides (AS), nonsense oligonucleotides (NS) or phosphate buffered saline (PBS) were injected daily for 18 days after immunization of SJL/J (H-2s)-mice with myelin proteolipid protein (PLP) peptide 139-151. In the AS group, there was a statistically significant reduction in both the mean maximal disease score (1.85 in the AS, 2.94 in the NS and 2.75 in the PBS-groups, respectively, P < 0.025) and in the cumulative disease incidence ( approximately 60% in the AS group and approximately 90% in the control groups). Histological and immunohistochemical analysis showed reduced inflammation and demyelination, as well as reduced p75 expression at the blood-brain barrier (BBB) in the AS-treated mice in comparison with both control groups. There was no difference, however, in p75 expression on neural cells within the CNS between the three groups of mice. We conclude that p75 could play a proactive role in the pathogenesis of EAE and may exert its effect at the level of the BBB. 相似文献
4.
Roxburgh RH Seaman SR Masterman T Hensiek AE Sawcer SJ Vukusic S Achiti I Confavreux C Coustans M le Page E Edan G McDonnell GV Hawkins S Trojano M Liguori M Cocco E Marrosu MG Tesser F Leone MA Weber A Zipp F Miterski B Epplen JT Oturai A Sørensen PS Celius EG Lara NT Montalban X Villoslada P Silva AM Marta M Leite I Dubois B Rubio J Butzkueven H Kilpatrick T Mycko MP Selmaj KW Rio ME Sá M Salemi G Savettieri G Hillert J Compston DA 《Neurology》2005,64(7):1144-1151
5.
Wu Q Butzkueven H Gresle M Kirchhoff F Friedhuber A Yang Q Wang H Fang K Lei H Egan GF Kilpatrick TJ 《NeuroImage》2007,37(4):1138-1147
Diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) are widely used to investigate central nervous system (CNS) white matter structure and pathology. Changes in principal diffusivities parallel and perpendicular to nerve fibers or axonal tracts have been associated with axonal pathology and de/dysmyelination respectively. However, the ultra-structural properties and the pathological alterations of white matter responsible for diffusivity changes have not been fully elucidated. We examined the relationship between the directional diffusivities and ultra-structural properties in mouse optic nerve using healthy animals, and mice with optic neuritis (ON) that exhibited marked inflammatory changes and moderately severe axonal pathology. Progressive axonal degeneration in ON resulted in a 23% reduction of parallel diffusivity as detected by diffusion MRI (P<10(-5)), but no change in perpendicular diffusivity. Parallel diffusion changes were highly correlated with the total axolemmal cross-sectional area in the pre-chiasmal portion of the optic nerve (r=0.86, P<0.001). This study provides quantitative evidence that reduced parallel diffusivity in the optic nerve correlates significantly with axolemmal cross-sectional area reductions. MRI-based assessment of axonal degeneration in murine ON is feasible and potentially useful for monitoring of neuro-protective therapies in preclinical trials in animals. 相似文献
6.
Risk of early relapse following the switch from injectables to oral agents for multiple sclerosis
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T. Spelman L. Mekhael T. Burke H. Butzkueven S. Hodgkinson E. Havrdova D. Horakova P. Duquette G. Izquierdo F. Grand'Maison P. Grammond M. Barnett J. Lechner‐Scott R. Alroughani M. Trojano A. Lugaresi F. Granella E. Pucci S. Vucic the MSBase Study Group 《European journal of neurology》2016,23(4):729-736
7.
van der Mei IA Ponsonby AL Dwyer T Blizzard L Taylor BV Kilpatrick T Butzkueven H McMichael AJ 《Journal of neurology》2007,254(5):581-590
Abstract
Background
Adequate 25(OH)D levels are required to prevent adverse effects on bone health. Population-based data on factors associated
with 25(OH)D levels of people with MS have been lacking. Objectives To examine the prevalence and determinants of vitamin
D insufficiency in a population-based sample of MS cases and controls, and to compare 25(OH)D status between MS cases and
controls, taking into account case disability.
Methods
We conducted a population based case-control study in Tasmania, Australia (latitude 41–43°S) on 136 prevalent cases with MS
confirmed by magnetic resonance imaging and 272 community controls, matched on sex and year of birth. Measurements included
serum 25(OH)D, sun exposure, skin type, dietary vitamin D intake and disability including EDSS.
Results
A high prevalence of vitamin D insufficiency was found in MS cases and controls. Among MS cases, increasing disability was
strongly associated with lower levels of 25(OH)D and with reduced sun exposure. Cases with higher disability (EDSS > 3) were
more likely to have vitamin D insufficiency than controls (OR = 3.07 (1.37, 6.90) for 25(OH)D ≤ 40 nmol/l), but cases with
low disability were not (OR = 0.87 (0.41, 1.86)).
Conclusion
The strong associations between disability, sun exposure and vitamin D status indicate that reduced exposure to the sun, related
to higher disability, may contribute to the high prevalence of vitamin D insufficiency found in this population-based MS case
sample. Active detection of vitamin D insufficiency among people with MS and intervention to restore vitamin D status to adequate
levels should be considered as part of the clinical management of MS. 相似文献
8.
Validation of a novel biomarker for acute axonal injury in experimental autoimmune encephalomyelitis
Gresle MM Shaw G Jarrott B Alexandrou EN Friedhuber A Kilpatrick TJ Butzkueven H 《Journal of neuroscience research》2008,86(16):3548-3555
In multiple sclerosis, inflammatory axonal injury is a key pathological mechanism responsible for the development of progressive neurological dysfunction. The injured axon represents a therapeutic target in this disease; however, therapeutic trials of neuroprotective candidates will initially require preclinical testing in an animal model of inflammatory axonal injury and subsequently the development of a reliable paraclinical measure of axonal degeneration in humans. In the present study, we demonstrate the validity of serum phosphorylated neurofilament H (pNF-H) as a marker of axonal injury in murine experimental autoimmune encephalomyelitis (EAE). At the time of maximum disease severity (EAE day 22), the average serum pNF-H level reached 5.7 ng/ml, correlating significantly with the EAE paraplegia score (r = 0.75, P < 0.001). On average, 40% of axons in the spinal cord were lost in EAE, and serum pNF-H levels were highly correlated with axon loss (r = 0.8, P < 0.001). Axonal injury was a severe and acute event, insofar as serum pNF-H levels were not significantly elevated at early (EAE day 12) or late (EAE days 35 and 50) disease time points. Our results demonstrate that acute inflammatory axonal injury is a pathological feature of murine MOG(35-55) EAE, indicating that this model may mirror the acute pathological events in active multiple sclerosis lesions. Furthermore, we have validated the serum pNF-H assay as an unbiased measurement of axonal injury in EAE, facilitating rapid screening of potential neuroprotective therapies in this model. 相似文献
9.