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  • 1
    ISSN: 1432-1920
    Schlagwort(e): Key words Brain stem ; Olivary nuclei ; Ischaemia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We describe a patient with the “top of the basilar” syndrome, in whom MRI documented the appearance and regression of olivary hypertrophy.
    Materialart: Digitale Medien
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  • 2
    ISSN: 1432-1920
    Schlagwort(e): Brain stem ; Olivary nuclei ; Ischaemia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We describe a patient with the “top of the basilar” syndrome, in whom MRI documented the appearance and regression of olivary hypertrophy.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1432-0533
    Schlagwort(e): Key words p75NTR ; Nerve regeneration ; Spinal cord ; Dorsal root ganglia ; Sympathetic ganglia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Expression of low-affinity neurotrophin receptor (p75NTR) was immunohistochemically examined in the peripheral nerve trunks, dorsal root ganglia, sympathetic nerve ganglia and spinal cords in various human neurological diseases manifesting peripheral neuropathies. p75NTR was expressed in the nerves with axonal degeneration, and was also prominent in the nerves with newly regenerating axons. In contrast, axonal pathology tended to reduce the expression of p75NTR in the neuronal perikarya of the dorsal root genglion and sympathetic nerve ganglion neurons. In the ventral and lateral horn cells, the p75NTR immunoreactivity was not detected in the normal and diseased nerves except for amyloid polyneuropathy. These p75NTR expressions in the diseased human peripheral nervous tissues would be regulated by an underlying pathology-related process, and could play a role in peripheral nerve repair.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    ISSN: 1432-0533
    Schlagwort(e): Key words Advanced glycation end products ; Alzheimer’s disease ; Astrocytes ; Microglia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract    In the previous study [Takeda et al. (1996) Neurosci Lett 221: 17–21], we reported that the advanced glycation end products (AGEs) in the external space of neuronal perikarya (extraneuroperikaryal AGE deposits) were significantly abundant in the Alzheimer’s brain. In this study, we investigated the spatial relationship of the extraneuroperikaryal AGE (carbocymethyllysine and pentosidine) deposits in astrocytes and microglial cells in the Alzheimer’s disease brain using double immunolabelling for AGEs and astrocyte or microglial cell markers. Most of the extraneuroperikaryal AGE deposits were co-localized with glial fibrillary acidic protein-positive astrocytes. AGE deposit-bearing astrocytes also contained Gomori-positive granules. Furthermore, some of the extraneuroperikaryal AGE deposits were co-localized with microglial cells. These extraneuroperikaryal AGEs may activate astrocyte and microglia, and play a role in pathogenesis of Alzheimer’s disease.
    Materialart: Digitale Medien
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Acta neuropathologica 97 (1999), S. 253-259 
    ISSN: 1432-0533
    Schlagwort(e): Key words Aging ; Spinal canal ; Histology ; Spinal cord ; Syringomyelia
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract To elucidate the role of the human central canal on the physiology and pathogenesis of acquired syringomyelia, we analyzed the age-related morphologic changes in the normal human central canal of the spinal cord. The subjects included 158 autopsy cases ranging in age from 1 week postnatally to 116 years of age. Each segment of the whole spinal cords was investigated from the C3 to S3 levels. The microscopic pictures of the central canal were classified as patent or occluded at each level for each age decade. The patency rate under 1 year of age was 100% in almost all the segments, which markedly decreased in the second decade, and the canals were occluded in all the segments with advancing age. According to the longitudinal pattern of the central canal occlusion, 19 of 20 cases where the canals were patent in all segment levels were less than 10 years of age. Cases in which the canals were occluded in all segment levels appeared in the second decade, and their number increased gradually with advancing age. The occlusion of the central canal started at the T6 and L5 to S2 levels. We suggest that the central canal does not function after infancy because of its occlusion, and that it is not involved in the development of syringomyelia in adult patients.
    Materialart: Digitale Medien
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  • 6
    ISSN: 1432-0533
    Schlagwort(e): Key words X-linked recessive spinal and bulbar ; muscular atrophy ; Corticospinal tract ; Spinal ventral horn cells ; Alpha motor neuron ; Interneuron
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A quantitative study was performed on spinal cord lesions in seven patients with X-linked recessive spinal and bulbar muscular atrophy. The myelinated fiber density of the lateral corticospinal tracts at the T7 cord level was well preserved for both large and small myelinated fibers. On the other hand, neurons in the L4 ventral horn were markedly depleted; marked loss was noted of the large alpha and medium-sized gamma motor neurons located in the lateral and medial nuclei as well as the small neurons in the intermediate zones of the ventral horn. These results suggest that myelinated fiber density and fiber-size distribution in the corticospinal tract are well preserved and that neuronal loss in the ventral horns is not restricted to alpha and gamma motoneurons but also involves small interneurons.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1432-0533
    Schlagwort(e): Key words Spinal ventral horn ; Aging ; Interneuron ; Alpha motor neuron ; Morphometry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract A cytoarchitectonic study of spinal ventral horn cells was performed to identify age-related changes. The diameter distribution of ventral horn neurons of the fourth lumbar segment of the spinal cord and their size and topographical distributions were investigated in 14 autopsy cases. These cases represented patients of 18–100 years of age who had died of non-neurological diseases. The results indicate that small neurons widely distributed in the intermediate zone of the ventral horn significantly diminished with aging (P 〈 0.0005, r = –0.898), whereas medium-sized and large neurons located in the medial and lateral nuclei showed only a slight decrease with advancing age. The total number of neurons in the whole ventral horn was also noted to decrease significantly with aging (P 〈 0.0005, r = –0.899). While small neurons in the intermediate zone of the ventral horn are thought to be mostly interneurons, their physiological function still remains obscure in many respects. The findings of this study provide insight into age-related cell loss in terms of size and location.
    Materialart: Digitale Medien
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  • 8
    ISSN: 1432-0533
    Schlagwort(e): Key words Paraneoplastic sensory neuronopathy ; Hu antigen ; Multifocal lesion ; Tissue distribution
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We investigated the distribution of lesions and Hu antigen expression in two autopsied cases of anti-Hu antibody-positive paraneoplastic sensory neuronopathy (carcinomatous subacute sensory neuropathy). Pathological changes in both patients were limited to the primary sensory neurons, some of the sympathetic ganglia and hippocampal regions. The lesions showed a multifocal distribution that differed among the spinal segmental levels and in the individual dorsal root ganglia as well as in the nerve fascicles. Western blot analysis of the patients’ serum revealed that Hu antigens were extensively and widely expressed throughout the central nervous system, sensory and sympathetic ganglia and cancer cells, but not in the non-neural visceral tissues. Reverse transcriptase-polymerase chain reaction also showed that the Hu D, Hu C, Hel-N1 and Hel-N2 mRNAs were extensively and widely expressed through the neural tissues and cancer cells, but not in the visceral tissues. Thus, the distribution of antigen expression was very different from that of the lesions. Taken together with the distribution of lesions and Hu antigen expression, it is suggested that factors other than anti-Hu antibodies are also involved in the pathogenesis of this neuronopathy.
    Materialart: Digitale Medien
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  • 9
    ISSN: 1432-1203
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract The crossover breakpoints for Charcot-Marie-Tooth disease type 1A (CMT1A) and hereditary neuropathy with liability to pressure palsies (HNPP) are located in the CMT1A-REP repeat flanking a 1.5-Mb region of chromosome 17p11.2–12. The precise locations of the breakpoints are heterogeneous, and we analyzed the relative frequency distribution of breakpoints in 33 unrelated Japanese CMT1A and 3 unrelated HNPP families. The CMT1A-REP repeat region was divided into five regions, A, B, C, D and E, based on restriction site differences between the proximal and distal CMT1A-REP repeats. The frequency distribution of breakpoints within the CMT1A-REP repeat in the Japanese patients was 3% in region A, 78% in B/C and 19% in D, which is similar to that in Caucasian patients. This result also indicates that an 8-kb region defined by region B/C is a recombinational hotspot within the CMT1A-REP repeat in Japanese patients.
    Materialart: Digitale Medien
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  • 10
    ISSN: 1432-1459
    Schlagwort(e): Acute autonomic and sensory neuropathy ; Sensory ataxia ; Ganglioneuronopathy ; Neuron-specific enolase ; S-100b protein
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We evaluated the clinicopathophysiological features of three patients with acute autonomic and sensory neuropathy (AASN) who were followed for over 3 years. Signs of an autonomic disturbance including vomiting, anhidrosis, urinary disturbances, orthostatic hypotension and reduced coefficient of variation of the R-R interval on electrocardiography gradually improved about 1 year after onset. However, all three exhibited severe generalized sensory impairment for all modalities with the development of persistent sensory ataxia. No sensory nerve action potentials could be elicited and no somatosensory evoked potentials could be obtained. Sural nerve biopsy revealed severe axonopathy. In two patients, a high-intensity area was observed in the posterior column of the spinal cord on T2*-weighted axial magnetic resonance images. The level of neuron-specific enolase in cerebrospinal fluid was markedly elevated in two patients, indicating spinal nerve root or sensory neuron damage. Motor nerve function was well preserved in all patients. Our findings suggests that the major lesion in patients with AASN, particularly those with a sensory deficit, is present in the dorsal root ganglion neurons, that is there is a ganglioneuronopathy.
    Materialart: Digitale Medien
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