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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 52 (1974), S. 238-245 
    ISSN: 1432-1440
    Keywords: Multiple Sclerosis ; lymphocyte transformation ; myelin basic protein ; auto-immune disease and immune status in M.S. ; vaccinia-antigen and chronic virus infection ; immunosuppression ; Multiple Sklerose ; Lymphocytentransformation ; basisches Markscheidenprotein ; Autoimmunisationsvorgänge und Immunstatus bei Multipler Sklerose ; Vaccinia-Antigen und chronische Virusinfektion ; Immunosuppression und Lymphocytentransformation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 40 Kranken mit Multipler Sklerose (M.S.) und verschiedenen Kontrollgruppen von insgesamt 55 Personen wird die Lymphocytentransformation (14C-2-Thymidininkorporation) durch eine Anzahl von Antigenen untersucht. — M.S.-Kranke haben eine signifikant erhöhte Transformationsrate durch basisches Markscheidenprotein. Es besteht eine Korrelation zum Prozeßstadium und zum Schweregrad der Erkrankung. Der Befund zeigt immunologische Vorgänge an, die auf den Untergang von Markscheidengewebe zurückgehen, ist aber nicht für M.S. spezifisch, denn er läßt sich auch bei Kranken mit akuten cerebralen Prozessen erheben. Mit dem Lymphocytentransformationstest kann der Nachweis einer Autoaggressionskrankheit für die M.S. nicht erbracht werden. — Die Transformationsraten durch PHA, Human-Gammaglobulin und Tuberkulin, sowie die Spontantransformation bei M.S.-Kranken entsprechen denen der Kontrollen. Vaccinia-Antigen führt zu einer signifikant erhöhten Lymphocytentransformationsrate bei M.S.-Kranken und bei frisch gegen Pocken geimpften Personen. Dieser Befund bedarf weiterer Abklärung als Hinweis auf eine mögliche chronische Virusinfektion bei M.S. — Durch eine Langzeitbehandlung mit Azathioprin kommt es für alle geprüften Antigene bei Kranken mit M.S. nicht zu einer signifikanten Erniedrigung der Transformationsraten.
    Notes: Summary Lymphocyte transformation (14C-2-thymidin incorporation) is tested with a number of antigens on 40 patients with Multiple Sclerosis (M.S.) and different control groups totalling 55 subjects. M.S. patients have a significantly increased transformation by myelin basic protein. The transformation indexes correlate with the stage and the degree of severity of M.S. The finding indicates immune reactions induced by the destruction of myelin. This is, however, non specific to M.S. alone, since this same finding arises also in patients with other acute cerebral diseases. The lymphocyte transformation cannot proof that M.S. is an autoimmune disease. — The transformation by PHA, human gamma-globulin and tuberculin, as well as the spontaneous transformation in M.S. patients matches those of the control groups. Vacciniaantigen leads to a significantly increased lymphocyte transformation in M.S. patients as well as in subjects recently inoculated against smallpox. This finding needs further clarification and points to a possible chronic virus infection in M.S. A prolonged therapy with Azathioprin does not significantly reduct the transformation for any tested antigen in M.S. patients.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1440
    Keywords: Acyl-neuramic acids ; Plasma ; T-lymphocyte ; Mammary carcinoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Increased sialic acid levels reflecting tumor burden are found on the surface of T-lymphocytes and in the plasma of patients with carcinoma of the mammary gland. The data of the determinations of sialic acid content and distribution on T-cells, using microanalytical methods such as HPLC and a colorimetric test, show that the total sialic acid content is increased by about 60% and that nearly 80–90% of the sialic acids consist of Nacetyl-9-O-acetyl-neuraminic acid, in comparison to the healthy controls (not containing O-acetylated neuraminic acid). Investigations on lymphocytes of malignant melanoma patients show similar changes of sialic acid content and distribution on the cell surface. Increased sialic acid levels are also found in the plasma of patients with cancer but no O-acetylated derivative can be found. Furthermore the examinations show that the separation of the T-lymphocytes from the total lymphocyte fraction is not required. Determination of sialic acids in the total lymphocyte fraction can be a simplification in carrying out further diagnostic investigations. A high level of sialic acids as “antirecognition factor” seems to be not only a marker of tumor cells but also an attribute of T-lymphocytes, involved in the defence against the malignoma (malignant melanoma, breast cancer). Considering the possible contribution of sialic acid to the immunoregulatory protective mechanism during the first stage of pregnancy, sialic acid content and distribution on T-cells of pregnant women are investigated. Both an increase and a change in the distribution of sialic acids can be excluded.
    Type of Medium: Electronic Resource
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