Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 60 (1982), S. 1303-1309 
    ISSN: 1432-1440
    Keywords: Chronic lymphocytic leukemia ; B1, B2 and T lymphocytes ; Reverse hemolytic plaque assay ; Immunoglobulin-secreting cells ; Chronisch lymphatische Leukämic ; B1, B2 und T Lymphocyten ; Indirekter Plaque Assay ; Immunglobulinsezernierende Zellen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mittels eines indirekten Protein A Plaque Assays wurden im peripheren Blut von 22 Patienten mit B1-CLL, einem Patienten mit B2-CLL und einem Patienten mit einer Suppressor-T-CLL die Lymphocyten bestimmt, die spontan bzw. nach Stimulation mit Pokeweed Mitogen Immunglobuline synthetisieren. Die Diagnosen wurden mit Hilfe der Cytologie und der Histologie sowie anhand von Markeruntersuchungen gestellt. Lymphocyten von Patienten mit B1- und B2-CLL waren weder spontan noch nach Pokeweed Mitogen-Stimulation in der Lage, Immunglobuline zu sezernieren. Im Falle der T-CLL war die Spontansekretion höchstwahrscheinlich durch die OKT 8 positive Leukämiepopulation supprimiert, da nach Kultivierung mit Pokeweed Mitogen eine normale Immunglobulin-Sekretion — verbunden mit einer Abnahme der OKT 8 positiven Zellen — festzustellen war. Ko-kulturexperimente mit frisch isolierten, ungetrennten Lymphocyten von Normalpersonen und Lymphocyten von Patienten waren nicht aussagekräftig, da isolierte normale B-Zellen allein schon eine sehr hohe Immunglobulinsekretionsrate aufwiesen. Dagegen erbrachten Ko-kulturexperimente mit Subpopulationen von B1-CLL Patienten den Beweis für einen wirklichen B-Zelldefekt, während die entsprechenden T-Lymphocyten als normale Helferzellen fungieren konnten.
    Notes: Summary Using a reverse hemolytic protein A plaque assay, spontaneous and pokeweed mitogen (PWM)-induced immunoglobulin (Ig) secretion was determined in peripheral blood from 22 patients with B1-chronic lymphocytic leukemia (CLL), one patient with B2-CLL, and one patient with suppressor T-CLL. Diagnoses were established by cytological and histological criteria as well as several marker analyses. Lymphocytes from B1- and B2-CLL patients were unable to secrete Ig either spontaneously or after PWM stimulation. In T-CLL lymphocytes, spontaneous Ig secretion was suppressed very probably by the OKT-8-positive leukemic population, since, after cultivation with PWM, a normal Ig secretion could be demonstrated which was paralleled by a decrease in the OKT-8-positive cells. Cocultivation experiments with freshly isolated, unseparated lymphocytes from normal subjects and lymphocytes from patients were of no informational value, since isolated normal B-cells alone already showed a high rate of Ig secretion. However, coculture experiments with separated subpopulations after PWM stimulation revealed an intrinsic B-cell defect in lymphocytes from B1-CLL patients, whereas their T-lymphocytes were found to be normal helper cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 61 (1983), S. 807-812 
    ISSN: 1432-1440
    Keywords: T-cell neoplasias ; Monoclonal antibodies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Surface marker studies were carried out on neoplastic cell samples (peripheral aspirates and skin biopsies) of 302 patients with non-Hodgkin lymphomas (221 patients) and acute lymphatic leukaemias (81 patients). In 11 patients with non-Hodgkin lymphomas (5%) and eight patients with acute lymphatic leukaemia (10%), the neoplastic cells possessed phenotypic characteristics of T cells. The investigations were carried out by means of an indirect immunofluorescence technique using a panel of monoclonal antibodies (OKT 3, 4, 6, 8, 9, 10; OKM 1; HNK 1 and VIL A 1). In addition, conventional markers (SIg, E-R 4°, E-R 37°, absorbed polyclonal rabbit antithymus and anti-TDT) were used. Our results, which show a pronounced phenotypic surface marker heterogeneity between the group of T-cell neoplasias, emphasize the diagnostic value of monoclonal antisera as compared to polyclonal reagents. Eleven different surface marker profiles were observed in the 19 patients investigated.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 59 (1981), S. 1101-1108 
    ISSN: 1432-1440
    Keywords: Multiple myeloma ; B-cell activation ; Reverse hemolytic plaque assay ; Immunoglobulinsecreting cells ; Multiples Myelom ; B-Zellaktivierung ; Indirekter Plaque Assay ; Immunglobulinsezernierende Zellen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die durch Pokeweed Mitogen induzierte Transformation von B Lymphozyten in Immunglobulin-sezernierende Zellen wurde bei 25 Patienten mit multiplem Myelom in einem indirekten Plaque Assay untersucht. Fünfzehn Patienten zeigten ein normales Verhalten bezüglich der Zahl der Immunglobulin-sezernierenden Zellen, während 10 Patienten eine erniedrigte B Zell Reaktivität aufwiesen, die nicht auf eine bei 15 Patienten angewandte Melphalan/Steroid Therapie bezogen werden konnte. Experimente mit Lymphozyten-Subpopulationen zeigten, daß die bei einigen Patienten fehlende Transformationsfähigkeit immer allein auf einem Defekt der B Zell-Population beruhte. In Ko-Kulturexperimenten mit Lymphozyten von Normalpersonen und von Patienten mit multiplem Myelom konnte in einem Fall eine zellvermittelte Suppression festgestellt werden, während humorale supprimierende Faktoren im Serum von Patienten mit der angewandten Technik des indirekten Plaque Assays nicht nachgewiesen werden konnten. Die Patienten ließen sich in 3 Gruppen einteilen: (a) Patienten mit einer normalen B Zellfunktion, (b) Patienten mit einer reversiblen, tumorabhängigen Suppression der B Zellreaktivität und (c) Patienten, bei denen die normale B Zellpopulation durch nicht reaktive Zellen ersetzt war.
    Notes: Summary The pokeweed-mitogen-induced transformation of B-lymphocytes into immunoglobulin-secreting cells was studied in vitro in 25 patients with multiple myeloma using a reverse hemolytic plaque assay. Fifteen patients showed a good response in generating immunoglobulin-secreting cells, whereas 10 patients showed a decreased B cell reactivity which was not due to intermittent melphalan/steroid therapy administered to 15 patients. Experiments with lymphocyte subpopulations demonstrated that the inability of some multiple-myeloma patients to generate immunoglobulin-secreting cells was always based on a defect in the B-cell subset. Co-culture experiments with lymphocytes from normal individuals and patients revealed a cell-mediated suppression in one case, whereas humoral suppressive factors in the patients' serum could not be observed using the reverse hemolytic plaque assay. Patients were classified into three groups: (a) patients with a normal B-cell function, (b) patients with a reversible, tumor-dependent suppression of B-cell reactivity and (c) patients in whom the normal B-cell population was replaced by non-reactive cells.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1432-1440
    Keywords: Multiple myeloma ; Benign monoclonal gammopathy ; Lymphocyte subsets ; Monoclonal antibodies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A panel of monoclonal antibodies that identify various antigens present on T and B cells was used to characterize circulating blood lymphocyte subsets in multiple myeloma [(MM) - 13 patients] and benign monoclonal gammopathy [(BMG) - 5 patients]. In MM and BMG an increase in B cell proportions (BA 1 positive cells) was observed, whereas T cells (Lyt 3 positive cells) were reduced compared to normal controls. However, with respect to the T cell subset distribution, a marked diversity between MM and BMG was noted. This may help to differentiate BMG from MM. In MM a relative decrease in inducer/helper T cells (OKT 4 positive cells) and increase in suppressor/cytotoxic T cells (OKT 8 positive cells) as well as in NK/K T cells (Leu 7 positive cells) was observed. On the other hand, in BMG the relative T cell subset distribution was comparable to those seen in normal subjects.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Analytical Biochemistry 11 (1965), S. 377-382 
    ISSN: 0003-2697
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0301-0104
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Inorganica Chimica Acta 124 (1986), S. 213-217 
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0020-1693
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 1432-2013
    Keywords: Mammalian Ventricular Myocardium ; Cholinergic Innervation ; Endogenous Acetylcholine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of endogenous acetylcholine (ACh) on the isometric force of contraction has been investigated on 40 papillary muscles of the cat right ventricle and on 20 strips of the chicken right ventricle. ACh was released from intramural cholinergic nerve endings by high voltage stimulation and simultaneous application of trains of stimuli during the absolute refractory period of the myocardium. In the pharmacologically untreated heart muscle the negative inotropic effect of sndogenous ACh was generally superimposed on the positive inotropic effect of simultaneously released catecholamines. During trains of high voltage stimuli, cat papillary muscles pretreated with reserpine showed a significant reduction in amplitude (average 19%) only if contractility had been increased by previous application of noradrenaline or isoprenaline. With guanethidine pretreatment high voltage stimulation reduced the amplitude significantly by 34%. In ventricular myocardium of chicken the negative inotropic effect of endogenous ACh was more impressive even in the absence of an increased contractility due to catecholamines. It is concluded from the following findings, that the negative inotropic substance is ACh: the negative inotropic effect was intensified by neostigmine and prevented by atropine; liquid, sampled from the bath during trains of high voltage stimuli was able to induce a contracture of frog rectus; under trains of high voltage stimuli the radio-activity in the perfusion liquid of preparations, pretreated with ratio-active ACh, was increased during the wash-out period. Moreover, the existence of cholinergic nerve fibers could be detected in cat papillary muscles as well as in chicken heart preparations by means of histochemical identification.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...