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  • 1
    ISSN: 1432-0533
    Keywords: Acridine Orange ; RNA ; Regeneration ; Denervation ; Fluorescent microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The Acridine Orange (AO) stain for muscle biopsies is particularly useful to identify regenerating and ongoing hypertrophic muscle fibers under fluorescent microscopy. This method was applied to muscle biopsies from 65 patients who suffered from various childhood neuromuscular disorders. While normal fibers showed dull green cytoplasm with small green-yellow nuclei, striking fluorescent fibers were observed in eight cases of congenital muscular dystrophy (CMD) and 12 cases of Duchenne muscular dystrophy (DMD); these fibers were characterized as follows: (1) small fibers with big oval or spherical nucleic which fluoresced strongly with a bright orange color; (2) fibers of various sizes and different degrees of orange fluorescence; and (3) opaque fibers with bright yellow cytoplasm. The small diameter fibers in Werdnig-Hoffmann (WH) disease, nemaline myopathy, and congenital fiber type dysproportion failed to show apparent AO-RNA fluorescence. Although all the atrophic fibers in Kugelberg-Welander (KW) disease showed a vague orange fluorescent color, this was obviously different from that of regenerating fibers seen in CMD and DMD. In addition to these findings, the hypertrophic fibers in a case of unclassified myopathy also showed moderate organe fluorescence around the entire periphery of the cytoplasm.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1459
    Keywords: Lipodystrophy ; Demyelination ; Free fatty acid ; Cholesterol ; Sphingolipid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Im Gehirn einer sogenannten „Membranolipodystrophie“ (ML) und in drei normalen Gehirnen wurden Neutrallipide und Sphingolipide vergleichend analysiert. Eine große Menge Frei-Fettsäure wurde beobachtet, aber Cholesterolester fand sich weder in der grauen noch in der weißen Substanz des ML-Gehirns. In der weißen Substanz des ML-Gehirns wurde eine geringe Abnahme des Cholesterins, der Cerebroside und auch Totallipide im Vergleich mit den normalen Gehirnen beobachtet. Es gab nicht eine bedeutsame Differenz zwischen ML und den normalen in der Komposition der Frei-und Sphingolipide-Fettsäure.
    Notes: Summary Lipids were extracted from brains of a patient with membranous lipodystrophy (ML) and three normal patients and the neutral lipid and sphingolipid constituents were investigated. The storage of a large amount of free fatty acid was observed in the ML brain, but no cholesterol ester was found. Total lipid, cholesterol and cerebroside contents were slightly decreased in the white matter of the ML brain. The compositions of free and sphingolipid fatty acids did not differ between ML and normal brains.
    Type of Medium: Electronic Resource
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