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  • Amyloidosis  (3)
  • Acoustic startle response  (2)
  • Derived amyloidosis  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 399 (1983), S. 233-236 
    ISSN: 1432-2307
    Keywords: Amyloid ; Amyloidosis ; Lymph nodes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of a patient presenting with supraclavicular and cervical lymph node enlargement with demonstration of amyloid is presented. Histologic features are described. Amyloid deposition was not found in any other organ. Immunohistochemical typing with antisera raised against protein AA, Aλ, and Aκ showed a reaction only against Aλ. Thus, this case belongs to the immunoglobulin λ light chain-derived types that occur in many other parts of the body, particularly the respiratory tract.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 419 (1991), S. 349-353 
    ISSN: 1432-2307
    Keywords: Long-term haemodialysis ; β 2-Microglobulin ; Derived amyloidosis ; Caecal perforation ; Pathological hip fracture ; Immunohistochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 73-year-old man with chronic renal failure of undetermined aetiology had received haemodialysis for 12 years when he died of acute purulent peritonitis due to caecal perforation. Amyloid deposits detected in a cystic bone lesion in the left hip had caused a pathological fracture 17 days before death. At autopsy, extensive amyloid deposits were found in the osteoarticular system, in the cartilaginous surface and the capsular tissue of joints, ligaments, vertebral discs and bone. In addition, vascular amyloid deposits were diagnosed in the heart, kidneys, testes, lungs, skin and in the gastrointestinal tract. A special feature of this case were interstitial amyloid deposits forming a fine-meshed structure in the myocardium and plate-like deposits in the gastrointestinal tract. Immunohistochemically, all these deposits reacted strongly with antibody to humanβ 2-microglobulin but showed no reaction with antibodies to AA, Alambda, A-kappa and AF. The present case demonstrates that extra-osteoarticular manifestations of AB-amyloidosis can cause serious complications.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 412 (1987), S. 37-45 
    ISSN: 1432-2307
    Keywords: Amyloidosis ; Carpal tunnel syndrome ; Potassium permanganate ; Immunohistochemistry ; Immunoperoxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 140 biopsies from 108 patients afflicted with the carpal tunnel syndrome were studied, 27 of whom showed deposition of amyloid, in 6 of them to such an extent that the amyloid was considered significant in the pathogenesis of the carpal tunnel syndrome. Morphologically, vessels and ligaments were affected and especially the peritendinous structures. As it was always part of generalized amyloidosis, the amyloid in the carpal tunnel consisted immunohistologically of amyloid A in three cases (including one case with simultaneous amyloid deposition of the AA- and the AB-type), of amyloid Aϰ in one case, of amyloid of prealbumin origin in seventeen cases and of AB-amyloid in eight cases. We also described for the first time the manifestation of generalized senile amyloidosis (ASs) in the carpal tunnel. Deposition of amyloid ofβ-2-microglobulin type (AB) in the carpal tunnel was particularly frequent and massive.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1289
    Keywords: Schlüsselwörter Familiäre Amyloid Polyneuropathie ; Transthyretin ; Amyloidose ; Genetische Lebererkrankung ; Lebertransplantation ; Key words Familial Amyloid Polyneuropathy ; Transthyretin ; Amyloidosis ; Genetic liver disease ; Liver Transplantation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A 59-year old male of German origin noticed exercise-independent cardiac arrhythmia two years before admission. An alanine 47 transthyretin variant of Familial Amyloid Polyneuropathy with hypertrophic cardiomyopathy, peripheral sensory-motor polyneuropathy, I. degree AV heart block was diagnosed. To diminish production and deposition of mutant transthyretin and to prevent disease progression orthotopic liver transplantation was performed. Prior to transplant the patient complained of inappetence. Postoperatively, he received a chemically defined enteral nutrition regime that was discontinued after 30 months until return of appetite and weight gain indicated marked improvement. However, a duodenal biopsy still demonstrated amyloid deposits 24 months after transplantation. Echocardiographic findings remained unchanged. Neurologic examination showed an improvement of sensory-motor polyneuropathy with regression of electromyographic changes. Only traces of variant transthyretin were detectable in plasma samples taken 12 months after the operation. During the 3 year follow-up, no additional symptoms have occurred and progression of amyloidosis was prevented. Currently, orthotopic liver transplantation is the only specific treatment to prevent progression of familial amyloid polyneuropathy.
    Notes: Zusammenfassung Anläßlich der Abklärung von Herzrhythmusstörungen wurde bei einem 59-jährigen Patienten deutscher Herkunft eine Familiäre Amyloid Polyneuropathie (FAP) mit hypertropher Kardiomyopathie, beginnender peripherer Polyneuropathie, AV-Block I. Grades, intermittierend II. Grades Typ MOBITZ, und einer Aminosäuresubstitution von Glycin durch Alanin an Position 47 des Transthyretins (TTR Ala47) diagnostiziert. Um die weitere Bildung und Ablagerung des mutierten Transthyretins zu reduzieren und den Progreß der Erkrankung zumindest aufzuhalten, wurde die Indikation zur Lebertransplantation gestellt. Bei sonstiger Symptomfreiheit entwickelte der Patient bereits vor Transplantation eine progrediente Inappetenz. Postoperativ erhielt der Patient eine enteral-supportive Ernährung über Duodenalsonde für einen Zeitraum von 30 Monaten, bis sich der Appetit verbesserte und das Körpergewicht stabilisierte. In Biopsien der Duodenalschleimhaut ließ sich 24 Monate nach Transplantation weiterhin Amyloid nachweisen. Wie bereits vorTransplantation bestanden eine Verminderung von Magenperistaltik und Duodenalmotilität sowie eine hypertrophe Kardiomyopathie ohne wesentliche funktionelle Einschränkungen. Eine diskrete Verbesserung der sensomotorischen Polyneuropathie konnte anhand der Normalisierung elektromyographischer Veränderungen belegt werden. 12 Monate nach Transplantation waren nur noch Spuren der Transthyretinvariante (TTR Ala47) im Plasma zu finden. Während des bisherigen Beobachtungszeitraumes von mehr als 3 Jahren nach Transplantation sind keine neuen Symptome aufgetreten. Eine Progression der Erkrankung konnte eindeutig verhindert werden. Die orthotope Lebertransplantation ist gegenwärtig die einzige erfolgversprechende Therapieform, um eine Progression der Familiären Amyloid Polyneuropathie zu verhindern.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-3297
    Keywords: Acoustic startle response ; sensitization ; amygdala ; Roman high- and low-avoidance rats
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract To investigate the emotional reactions of two rat strains selectively bred for good and poor two-way avoidance acquisition (RHA/Verh and RLA/Verh), male animals of both strains were tested in an acoustic startle response test. They received 40 acoustic stimuli followed by 10 electric foot shocks and another 30 acoustic stimuli. RLA/Verh rats showed a significantly higher startle response compared to RHA/Verh animals, indicating a stronger emotional reaction to acoustic stimuli. In addition, the former showed a stronger response to foot shocks. Combined with earlier findings, we conclude that selection for two-way avoidance learning does not result in cognitive defects in the RLA/Verh strain but, rather, in stronger emotional reactions to fearful stimuli.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1573-3297
    Keywords: Acoustic startle response ; habituation ; sensitization ; fear ; genetic differences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract An increase in general responsiveness after aversive stimulation has provided a most widely accepted and well-understood sensitization paradigm. According to a second paradigm (based on the dual process theory of habituation and sensitization), not only additional aversive stimuli, but also the response-eliciting stimuli themselves, induce sensitization. To relate these two sensitization paradigms, we compared the course of startle response parameters during repetitive acoustic stimulation with the change in startle amplitude after electric footshocks in outbred Wistar and Sprague–Dawley rats. Compared to the Wistar rats used, the Sprague–Dawley rats showed a lower response decrement and a shortened latency during repetitive stimulation, both of which are indicators of increased sensitization by the startle-eliciting stimuli. In addition, the Sprague–Dawley rats also demonstrated a reduced increase in startle amplitude following footshock. This was postulated to be a consequence of the strong sensitization by startle-eliciting stimuli, which interferes with sensitization elicited by footshock. Because our Wistar and Sprague–Dawley rats did not differ in initial startle amplitude, but mainly in susceptibility to sensitization, further comparisons of these genetically different stocks of rats seem to be of potential value in studying differences in fear-motivated behavior.
    Type of Medium: Electronic Resource
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