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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Anatomia, histologia, embryologia 26 (1997), S. 0 
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In the present study of nutrition control of Wistar white rats, the ultrastructure of cerebellar Purkinje cells was studied after chronic ethanol exposure and a subsequent period of prolonged abstinence: a qualitative investigation of the perikarya of Purkinje cells was performed in age-matched controls (group A) and rats alcohol-fed for 5 months and withdrawn from this diet for 3 months (group B). The results showed massive accumulation of small dense bodies as well as obvious deposition of lipofuscin in the Purkinje cells of group B. Furthermore, ring-shaped Golgi apparatus units, lamellar bodies and degenerative foci dispersed throughout the cytoplasm of the alcohol-treated animals referred to degeneration processes and neuronal cell death, the morphological characteristics and the aetiology of which are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A confocal laser scanning microscope (with a 543 nm laser) was used for imaging rat Purkinje cell dendritic spines at high 3-D resolution. In a nutritionally controlled study of the rat, 5 months of ethanol consumption was demonstrated to alter the spines of Purkinje cell dendrites in rat cerebellum. Intact spines showed significant elongation after ethanol exposure, whereas this neuromorphological alteration could not be detected in controls. Spine elongation could be regarded as compensative growth of spines in search of new synaptic contacts due to alcohol induced cell loss.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 328 (1985), S. 417-421 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1436-6215
    Keywords: Hippocampus ; CA1 pyramidal neurone ; spines ; ethanol ; thiamine ; Hippocampus ; CA1 Pyramidenzelle ; dendritische Dornen ; Ethanol ; Thiamin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung In einer 5monatigen Versuchsperiode wurden ethanolinduzierte Schäden an den dendritischen Dornen der CA1-Pyramidenzellen des Hippocampus männlicher Wistarratten auf morphologischer Ebene dokumentiert. Die zentralnervösen Alterationen spiegeln sich nach täglicher Ethanolapplikation mit dem Trinkwasser und Thiamingaben in Höhe der 3fachen alimentären Empfehlung (1,19 mg/100 g Futter) in einer signifikanten Dornenvergrößerung (gemessene Parameter: Dornenlänge und Durchmesser des Dornenkopfes) wider. Die Dornenhypertrophie ist als neuronaler Kompensationseffekt zu interpretieren, der als Folge eines alkoholbedingten Zelltodes auftritt: Überlebende Neurone protrahieren ihre Dornen auf der Suche nach neuen synaptischen Kontakten zur Erhaltung des ‚neuronalen Kreislaufs‘. Demgegenüber weisen die dendritischen Dornen alkoholbehandelter Tiere, denen gleichzeitig hochdosierte Thiamingaben (119 mg/100 g Futter) verabreicht wurden, normale Längen und Durchmesser ihrer Endköpfe auf. Möglicherweise kann Thiamin durch die Aufrechterhaltung des neuronalen Kohlenhydratstoffwechsels alkoholinduzierte Degenerationen am zentralen Nervensystem der Ratte verhindern.
    Notes: Summary The specific aim of this study was to evaluate whether high doses of thiamine can compensate or prevent alcohol-induced damages of rat hippocampus CA1 pyramids. Twenty weeks of ethanol consumption together with a dose of thiamine in the range of 1.19 mg/100 mg food induced significant enlargement (parameters measured were length of the whole spine and diameter of the end-bulb) of dendritic spines. Hypertrophy can be interpreted as a compensation process due to alcohol-induced cell death because viable spines are in search of new synaptic contacts. In contrast, dendritic spines of the alcohol group fed at the same time with a high dose of thiamine (119 mg/100 g food=megavitamintherapy) showed normal data concerning these parameters. From these results it may be concluded that a megavitamin therapy supports a neuron's carbohydrate metabolism and therefore could be able to prevent or reduce alcohol-induced damages of hippocampal CA1 pyramidal cells in rat central nervous system.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 39 (1977), S. 211-218 
    ISSN: 1432-0533
    Keywords: Thiamine deficiency ; Starvation ; Axonal degeneration ; Dying-back neuropathy ; Mitochondrial increase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Electron microscopic investigations on sciatic and plantar nerves of thiamine deficient and starved rats show a distally pronounced axonal degeneration. The changes are present in starved and thiamine deficient animals, but the deficient animals are more severely affected. The earliest alterations consist of an increase of mitochondria and a proliferation of vesicular elements of the endoplasmic reticulum. They are followed by loop formations of the axon membrane, clustering and disintegration of neurotubules and neurofilaments, axonal shrinkage and finally myelin disruption. The distal accentuation of the early changes indicates a dying-back mechanism of axonal degeneration.
    Type of Medium: Electronic Resource
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