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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Comparative Biochemistry and Physiology -- Part B: Biochemistry and 70 (1981), S. 775-778 
    ISSN: 0305-0491
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0022-4731
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0533
    Keywords: Humoral immune response ; Glioma antigens ; Ultrastructural localization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Several human cell lines (normal and neoplastic glia, cerebral metastases from adenocarcinoma, fibroblasts) were incubated with sera from patients with well and poorly differentiated glioma and with sera from healthy donors and then stained with PAP complex to define and localize the antibody reaction with cell surface antigens by means of electron microscopy. The sera of glioma patients proved to contain antibodies which bound the tumor-associated antigenic determinants on the cell membranes of gliomas and of cerebral metastases from adenocarcinoma in tissue cultures. Further, absorption testing of the reactive sera on normal brain, well-differentiated astrocytoma and cultured glioblastoma cells, together with cross-reactivity experiments suggests that at least two antigens or groups of antigens are expressed on the glioma cell surface: one shared by well and poorly differentiated glioma cells and the other by poorly differentiated glioma cells and the cells of cerebral metastases from adenocarcinoma.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1590-3478
    Keywords: Adult orthochromatic leukodystrophy ; brain biopsy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Vengono riportate le caratteristiche istopatologiche cerebrali “intra vitam” di una paziente che presentava una forma ad inizio tardivo di leucodistrofia ortocromatica. All'età di 38 anni la paziente iniziò a manifestare un progressivo decadimento mentale ed una sindrome pseudobulbare. L'albero genealogico mostrava una ereditarietà a trasmissione autosomica dominante. Alle immagini Tc risultava un'ampia ipodensità della sostanza bianca anteriore. Le indagini biochimiche evidenziavano solo un modesto incremento dei VLCFA e nessuna alterazione delle attività enzimatiche urinarie. I campioni bioptici corticali e subcorticali prelevati dal lobo frontale mostravano una perdita neuronale nella sostanza grigia, accumulo di materiale autofluorescente dentro i neuroni residui e materiale sudanofilo all'interno dei macrofagi e degli astrociti, risparmio degli assoni. La microscopia eletronica rivelava slaminazione e frammentazione della mielina e la presenza di corpi elettrondensi e materiale vescicoloso all'interno di oligodendro ed astrociti. Viene discussa la diagnosi differenziale tra le forme di leucodistrofia ortocromatica ad esordio tardivo, quindi tra la malattia di Lowenber-Hill e la forma pura di leucodistrofia ortocromatica con accumulo di pigmento nelle cellule gliali.
    Notes: Abstract We report the intra vitam histopathological findings on the brain of a female patient presenting an adult form of orthochromatic leukodystrophy. At 38 years of age the patient began to show progressive dementia and a pseudobulbar syndrome. The pedigree revealed an autosomal dominant pattern of inheritance. The CT scan showed a wide hypodensity of the anterior white matter. Biochemical investigations showed only a slight elevation of serum VLCFA and no alteration of urinary enzymatic activities. Cortical and subcortical biopsy specimens from the rught frontal lobe showed: neuronal loss in the gray matter, accumulation of autofluorescent material within residual neurons and sudanophilic material within macrophages and astrocytes, sparing of axons. Electron microscopy showed lamination and fragmentation of the myelin and the presence of electrondense bodies and vesicular material into oligodendrocytes and astrocytes. We discuss the differential diagnosis of OLD forms with adult onset, namely between Löwenberg-Hill disease and the pure form of OLD with pigmented glial cells.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0878
    Keywords: Photosensitization ; Nervous system ; Planaria ; Eosin ; Hematoporphyrin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Photosensitization phenomena may be induced in planarias by eosin and hematoporphyrin, and as a result, dopamine agonistic behavior (“screw-like” hyperkinesia) is set up in the animal. Histochemical, ultrastructural and pharmacological investigations have shown that this hyperkinesia is of postsynaptic origin in eosin photosensitization, and of pre-synaptic origin in hematoporphyrin photosensitization. The authors suggest an hypothesis to explain the different activity of the two photosensitizers, and discuss the validity of the experiment with regard to human porphyria.
    Type of Medium: Electronic Resource
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