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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 45 (1979), S. 221-229 
    ISSN: 1432-0533
    Keywords: Mouse mutant Jimpy ; Optic nerve ; Lipid ultrastructure ; Phagolysosomes ; Phagocytes ; Histochemistry ; Freeze-etching ; Thin sections
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Optic nerves of the mouse mutant Jimpy and controls were studied in different developmental stages. The results cast some light on the nature and ultrastructure of intracellular lipids, which are a striking feature in the CNS of these affected mice. Light Microscopy. In the premyelination period the activity of acid phosphatase is quite similar in the lysosomes of both animal groups. A much higher increase of reaction product was found in Jimpy compared to controls during the advanced myelination stages. The normal glial cell arrangement in rows is absent in leucodystrophic animals. Electron Microscopy. Replicas of freeze-etched Jimpy optic nerves show lipid loaded cells exhibiting a plasma membrane different from that of astrocytes and oligodendrocytes, thus suggesting a relationship to phagocyting microglia. Furthermore, the rare myelin membranes are almost particle free. Three types of structurally different lipid inclusions could be observed. Most of the lipidic bodies are surrounded by a membrane studded with particles. The freeze-fractured morphology of the lipid inclusions was compared with the appearance in thin sections, incubated for acid phosphatase demonstration. Acid phosphatase reaction product within all three types of lipid containing vesicles indicate the lysosomal nature of these structures, which may represent myelin breakdown products and/or myelin precursors.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 155 (1996), S. 561-567 
    ISSN: 1432-1076
    Keywords: Glycogen deficiency ; Glycogen synthase ; Ketotic hypoglycaemia ; Corn (maize) starch ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Three children from two German families are described and the observations compared with the previously published three families comprising eight patients. The two index cases presented with morning fatigue, had ketotic hypoglycaemia when fasting which rapidly disappeared after eating, and hepatic glycogen deficiency and absent or very low hepatic glycogen synthase activity. Metabolic profiles comprising glucose, lactate, alanine, and ketones in blood were typical for hepatic glycogen synthase deficiency. Symptoms were rapidly relieved and chemical signs corrected by introducing frequent protein-rich meals and night-time feedings of suspensions of uncooked corn (maize) starch. The discovery of oligosymptomatic and asymptomatic siblings suggests that there are more persons with undiagnosed hepatic glycogen synthase deficiency.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1076
    Keywords: Eosinophil granulocytes ; GM1-gangliosidoses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract On routine smears of blood and bone marrow of four patients with GM1 gangliosidosis type I, eosinophil granulocytes were unusually pale and contained faintly stained, unevenly spaced granules some of which were larger than normal and had abnormal ultrastructural appearance. The anomaly may represent a hitherto overlooked but easily obtainable diagnostic marker.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 152 (1993), S. 592-594 
    ISSN: 1432-1076
    Keywords: Cornstarch ; Maize starch ; Persorption ; Glycogenosis type I
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sediments prepared from freshly voided urine of four patients with glycogenosis Ia, or leucine-sensitive hypoglycaemia, on oral cornstarch therapy contained starch granules, evidence for persorption i.e. the incorporation of undissolved starch particles. In these patients, amyluria was more marked than in untreated controls. While cornstarch therapy is successful and causes few side-effects, the possibility of late adverse reactions to persorbed starch should not be disregarded.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 155 (1996), S. 987-989 
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 134 (1980), S. 69-74 
    ISSN: 1432-1076
    Keywords: Achondrogenesis type I ; Ultrastructure ; Chondrocytes ; Cytoplasmic inclusions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The light- and electron-microscopic structure of articular and costal cartilage in a case of achondrogenesis type I has been described. The most characteristic ultrastructural change in the chondrocytes was conspicuous dilatation of the rough endoplasmatic reticulum (RER) which contained amorphous electronopaque material. This change in the RER was accompanied by marked hypertrophy of the Golgi apparatus; the matrix was basically unchanged.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 155 (1996), S. 561-567 
    ISSN: 1432-1076
    Keywords: Key words Glycogen deficiency ; Glycogen synthase ; Ketotic ; hypoglycaemia ; Corn (maize) ; starch ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Three children from two German families are described and the observations compared with the previously published three families comprising eight patients. The two index cases presented with morning fatigue, had ketotic hypoglycaemia when fasting which rapidly disappeared after eating, and hepatic glycogen deficiency and absent or very low hepatic glycogen synthase activity. Metabolic profiles comprising glucose, lactate, alanine, and ketones in blood were typical for hepatic glycogen synthase deficiency. Symptoms were rapidly relieved and chemical signs corrected by introducing frequent protein-rich meals and night-time feedings of suspensions of uncooked corn (maize) starch. The discovery of oligosymptomatic and asymptomatic siblings suggests that there are more persons with undiagnosed hepatic glycogen synthase deficiency. Conclusion Liver glycogen synthase deficiency is likely to be more common than is believed today. It should be sought in children who, before the first meal of the day, present with drowsiness, lack of attention, pallor, uncoordinated eye movements, disorientation or convulsions and who have hypoglycaemia and acetone in urine.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— A 17,000 g supernatant of mouse brain microsomes was subfractionated on a continuous sucrose gradient in order to localise ceramide galactosyltransferase (CGalt, EC 2.4.1.47) and cerebroside sulphotransferase (CST, EC 2.8.2.11), both enzymes involved in the synthesis of myelin lipids. The submicrosomal fractions were analysed for marker enzymes of myelin, plasma membranes, Golgi membranes, endoplasmic reticulum and lysosomes, and their protein distribution was studied. The results and EM studies give evidence that CGalT and CST are located in the Golgi membranes of the brain.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 241 (1973), S. 49-49 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The X-ray powder diffraction pattern of the isolated lung dust does not show any additional lines except those of quartz which can be traced in every human lung. A semiquantitative X-ray fluorescence analysis showed the presence of the following elements (in order of decreasing frequency): cerium, ...
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-1459
    Keywords: Gangliosidosis generalized ; Acid β-galactosidase deficiency ; Mental deterioration ; Dementia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Der Fall eines dreimonatigen Mädchens mit einer rasch progredienten psychomotorischen Retardation, einer Hepatomegalie, vacuolisierten Lymphocyten und nur geringgradigen Skeletveränderungen wird dargestellt. Die Ausscheidung von sauren Mucopolysacchariden war normal. An isolierten Leukocyten und in einer Leberbiopsie konnte ein Fehlen der sauren β-Galactosidase nachgewiesen werden. Die Diagnose einer generalisierten Gangliosidose mit fehlender Aktivität der β-Galactosidase konnte auch an kultivierten Fibroblasten bestätigt werden. Bei der Autopsie mit 16 Monaten wurde die Diagnose anhand von typischen Befunden histologischer, elektronenoptischer und biochemischer Untersuchungen der Organe bestätigt. Der angeborene β-Galactosidase-Mangel wurde bei den verschiedensten klinischen Krankheitsbildern gefunden, die von der generalisierten Gangliosidose mit schweren geistigen Defekten bis zu einem Morquio-ähnlichen Bild mit normaler Intelligenz reichen. Die Heterogeneität der klinischen Manifestationen beim β-Galactosidase-Mangel kann durch eine verschiedene Restaktivität des strukturmäßig veränderten Enzyms bezüglich seiner verschiedenen Substrate erklärt werden.
    Notes: Summary This report concerns a 3-month-old girl with rapidly progressive psychomotor retardation, hepatomegaly, vacuolated lymphocytes, minimal bone dysplasia and normal excretion of acid mucopolysaccharides. A deficiency of acid β-galactosidase was demonstrated in isolated leucocytes and in a liver biopsy. The diagnosis of generalized gangliosidosis due to deficiency of β-galactosidase was also based on the absence of the enzyme activity from cultured fibroblasts. The diagnosis was confirmed on autopsy at 16 months by typical histology, electron microscopy and biochemistry of the organs. β-galactosidase deficiency has been demonstrated in various clinical conditions ranging from generalized gangliosidosis with severe mental retardation to clinical pictures resembling Morquio's disease and normal intelligence. The heterogeneity of the clinical manifestations in β-galactosidase deficiency could be explained by different residual activities of a structurally mutated enzyme towards its various substrates.
    Type of Medium: Electronic Resource
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