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  • Paired helical filaments  (2)
  • ‘Purkinje cell degeneration’ (pcd)  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Neurofibrillary tangles in Niemann-Pick disease type C (1995)
    Springer
    Acta neuropathologica 89 (1995), S. 227-238 
    Details
    ISSN: 1432-0533
    Keywords: Neuronal storage disease ; Cholesterol metabolism ; Tau ; Paired helical filaments ; Lysosomal disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Niemann-Pick disease type C (NPC) is an autosomal recessive disease, belonging to a clinically heterogeneous group of lipid storage diseases, distinguished by a unique error in cellular trafficking of exogenous cholesterol, associated with lysosomal accumulation of unesterified cholesterol. Unlike Niemann-Pick disease types A and B, there is no primary genetic defect in sphingomyelinase in NPC. During the routine neuropathological study of NPC patients, we found neurofibrillary tangles (NFT) in a series of cases with a slowly progressive chronic course. These were not associated with β-amyloid deposits. The NFT were most frequent in the orbital gyrus, cingulate gyrus and entorhinal region of the cerebral cortex, but were also frequently found in the basal ganglia, thalamus and hypothalamus. In one of the most severely affected case, the NFT were even found in the neurons in the inferior olivary nucleus and in the spinal cord. The NFT were immunostained with Alz 50, and cosisted of paired helical filaments. The distribution of the neurons bearing the NFT was generally similar to that of the swollen storage neurons, and storage neurons often contained NFT in their perikarya and/or in the meganeurites. However, neurons with NFT could be noted without swollen perikarya. The coexistence of neuronal storage and NFT in NPC without amyloid deposits suggests that perturbed cholesterol metabolism and/or lysosomal membrane trafficking may play a role in the formation of NFT, and that amyloid deposits are not necessarily the prerequisite for NFT formation. The results of our study also suggest that NFT formation may be a rather nonspecific cellular reaction of neurons to certain slowly progressive metabolic perturbations of an as yet undefined nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309338
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Transplantation of cerebellar anlagen to hosts with genetic cerebellocortical atrophy (1987)
    Springer
    Anatomy and embryology 176 (1987), S. 145-154 
    Details
    ISSN: 1432-0568
    Keywords: Neurological mutant mice ; ‘Purkinje cell degeneration’ (pcd) ; Weaver ; Neural transplants ; Cerebellum ; Light microscopy ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Embryonic cerebellar grafts from genetically normal donors were implanted into the cerebellomedullary cistern of adult ‘Purkinje cell degeneration’ (pcd) and weaver mutant mice, which are respectively characterized by the selective loss of Purkinje and granule cells. Grafts placed into both mutant recipients exhibited a layered cellular organization reminiscent of the normal cerebellar cortex. Molecular, Purkinje, and granule cell layers were identifiable. Grafted Purkinje cells displayed characteristic cytological features, such as hypolemmal cisterns in association with mitochondria in the perikaryon, and lamellar structures in their axons. The cytological features of granule cell somata in the grafts appeared similar to those of mature granule cells. Electron microscopic examination of the molecular layer of the grafts revealed the presence of parallel fibers, which were not oriented in a parallel fashion; axon terminals of such fibers were often presynaptic to dendritic spines. The number of parallel fibers was markedly reduced in grafts implanted into both mutants compared to the normal cerebellar cortex; however, this phenomenon is commonly seen in cerebellum in tissue culture and in cerebellar transplants into normal hosts. It is concluded, therefore, that the environment of the mutant hosts does not affect the survival of Purkinje or granule cells and that transplantation of solid cerebellar grafts in the neurological mutants studied does not seem to pose any apparent limitations beyond those inherent to the process of cerebellar growth and differentiation outside its normal environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310047
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Neurofibrillary tangles in Niemann-Pick disease type C (1995)
    Springer
    Acta neuropathologica 89 (1995), S. 227-238 
    Details
    ISSN: 1432-0533
    Keywords: Key words Neuronal storage disease ; Cholesterol ; metabolism ; Tau ; Paired helical filaments ; Lysosomal disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Niemann-Pick disease type C (NPC) is an autosomal recessive disease, belonging to a clinically heterogeneous group of lipid storage diseases, distinguished by a unique error in cellular trafficking of exogenous cholesterol, associated with lysosomal accumulation of unesterified cholesterol. Unlike Niemann-Pick disease types A and B, there is no primary genetic defect in sphingomyelinase in NPC. During the routine neuropathological study of NPC patients, we found neurofibrillary tangles (NFT) in a series of cases with a slowly progressive chronic course. These were not associated with β-amyloid deposits. The NFT were most frequent in the orbital gyrus, cingulate gyrus and entorhinal region of the cerebral cortex, but were also frequently found in the basal ganglia, thalamus and hypothalamus. In one of the most severely affected case, the NFT were even found in the neurons in the inferior olivary nucleus and in the spinal cord. The NFT were immunostained with Alz 50, and consisted of paired helical filaments. The distribution of the neurons bearing the NFT was generally similar to that of the swollen storage neurons, and storage neurons often contained NFT in their perikarya and/or in the meganeurites. However, neurons with NFT could be noted without swollen perikarya. The coexistence of neuronal storage and NFT in NPC without amyloid deposits suggests that perturbed cholesterol metabolism and/or lysosomal membrane trafficking may play a role in the formation of NFT, and that amyloid deposits are not necessarily the prerequisite for NFT formation. The results of our study also suggest that NFT formation may be a rather nonspecific cellular reaction of neurons to certain slowly progressive metabolic perturbations of an as yet undefined nature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309338
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Serotonin fiber innervation of cerebellar cell suspensions intraparenchymally grafted to the cerebellum ofpcd mutant mice (1992)
    Springer
    Neurochemical research 17 (1992), S. 475-482 
    Details
    ISSN: 1573-6903
    Keywords: Cerebellar graft ; mouse, neurological mutant ; ‘Purkinje cell degeneration’ (pcd) ; serotonin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract One aspect of integration of implanted neurons into the neuronal circuitry of a defective host brain is the re-establishment of a host-to-graft afferent innervation. We addressed this issue by using the adult cerebellum of ‘Purkinje cell degeneration’ (pcd) mutant mice, which lack virtually all Purkinje cells after postnatal day (P) 45. Purkinje cells constitute one of the cerebellar cell types being innervated by axons of raphé serotonin (5-HT) neurons. In normal mice, 5-HT-immunoreactive fibers are distributed to all cerebellar folia. Following Purkinje cell loss inpcd mice, cerebellar 5-HT-immunoreactive fibers persist. Cerebellar cell suspensions were prepared from embryonic day (E) 11–13 normal mouse embryos and were intraparenchymally grafted into the cerebellum ofpcd mutants either directly or after pre-treatment with 5, 7-dihydroxytryptamine (5,7-DHT) to selectively remove 5-HT cells of donor origin. The state of Purkinje cells and 5-HT axons was monitored in alternate sections by 28-kDa Ca2+-binding protein (CaBP) and 5-HT immunocytochemistry, respectively. Serotonin-immunoreactive axons were seen in the grafts from 5 to 32 days after transplantation. In some of the grafts which had not been pre-treated with 5,7-DHT, a small number of 5-HT-immunoreactive cell bodies was found, indicating that part of the 5-HT fiber innervation of the graft could actually derive from donor cells. On the other hand, in grafts pre-treated with 5,7-DHT, no 5-HT cell bodies were seen in the grafted cerebellum; 5-HT fibre innervation of the grafts occurred, but it appeared to be slightly less robust compared to situations of co-grafted 5-HT cell bodies. These findings suggest that host 5-HT fibers are able to provide afferent innervation to donor cerebellar tissue; the presence of co-grafted 5-HT cells may augment such an innervation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00969895
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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