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Query: UMLS:C0026764 (multiple myeloma)
 36,148 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A cell hybrid has been selected from fusion of a mouse myeloma and rat spleen cells immunized against mouse lymphoma cells that produces monoclonal antibody against the mouse lymphocyte surface glycoprotein, T200. Antibody binding assays employing the monoclonal antibody show that there are about 50,000-100,000 molecules of T200 glycoprotein on mouse thymocytes and that similar antigens are present on spleen and bone marrow but not detected on nonlymphoid tissues. Examination of the labeled molecules precipitated from detergent extracts of spleen cells and thymocytes iodinated by the lactoperoxidase technique by SDS-PAGE confirm that there are structural differences between the antigens found on B and T lymphocytes. The B-cell glycoprotein consists of at least one component of apparent mol wt 220,000 on SDS-PAGE, while the T-cell glycoprotein has an apparent mol wt of about 190,000.
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PMID:Interspecies spleen-myeloma hybrid producing monoclonal antibodies against mouse lymphocyte surface glycoprotein, T200. 7 61

Human and mouse lymphocytes were surface-labeled by lactoperoxidase-catalyzed iodination, or by galactose oxidase oxidation followed by reduction with tritiated sodium borohydride. The labeled cells were lysed with Nonidet P-40. Proteins binding to Helix pomatia A hemagglutinin (HP) were isolated by affinity chromatography on HP-Sepharose and analyzed by sodium dodecyl sulfate polyacrylamide gel electrophoresis and autoradiography. A major cell surface glycoprotein (apparent mol. wt. 150 000, using reducing conditions) on human lymphocytes was responsible for almost all binding of HP. This protein was present on normal and malignant thymus-derived lymphocytes, e.g. thymocytes, blood T cells and T leukemia cell lines. It was also found on chronic lymphocytic leukemia cells, one null cell leukemia line, one unidentified leukemia line, one lymphoblastoid cell line of B origin and on one stem cell lymphoma line. In contrast, this protein was not found on various B cells at different steps of differentiation, e.g. four B lymphoma lines or one myeloma line. It was also absent from a histiocytic leukemia line. However, two of the four B lymphoma lines and the myeloma line had another HP-binding surface glycoprotein (mol. wt. 200 000) instead of the 150 000 protein. Studies of mouse lymphocytes similarly showed that thymus-derived lymphocytes (normal and malignant) but not normal adult B cells expressed a major HP-binding surface glycoprotein of apparent mol. wt. 130 000 (reducing conditions).
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PMID:Helix pomatia A hemagglutinin: selectivity of binding to lymphocyte surface glycoproteins on T cells and certain B cells. 30 19

Leukaemias which complicate myeloma under treatment are usually acute non-lymphocytic leukaemias. We report here a case of acute leukaemia with lymphoblastic features occurring 30 months after diagnosis of myeloma. The exceptional character of this association lead us to refine the cytological diagnosis by studying surface markers and ultrastructural cytochemistry. Because of the absence of T or B markers, and the absence of peroxidase activity in the nuclear envelope, the endoplasmic reticulum, and the Golgi apparatus of blastic cells, we conclude that this leukaemia is "null" lymphoblastic.
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PMID:[Acute leukaemia with lymphoblastic features occurring during myeloma (author's transl)]. 31 28

Anti-peroxidase antibody (Ab)-secreting hybrids have been produced by fusion of peroxidase (PO)-immunized mouse lymph node cells and immunoglobulin (Ig)-secreting P3-X63-Ag8 (X63) myeloma cells. Identification of Ab-secreting hybrids can be performed as early as day 5 after cell fusion by the hemolytic plaque assay. Immediately after identification, hybrids were directly isolated, by means of a micropipette, into Terasaki microchambers containing nutrient medium and a thymocyte filler layer. The yield of secreting hybrids is improved by using this procedure. All the cells of the PO 772 C2 clone show the same ultrastructural pattern and immunocytological properties; they are proplasmocytes, as are the parental X63 cells; they present intracisternae Ab and show no Ig or Fc receptors at the cell surface. Over 90% of viable PO 772 C2 cells form specific plaques. Isoelectric focusing and sodium dodecyl sulfate polyacrylamide gel electrophoresis show that the cells of this clone secrete Ab; the secreted Ig are formed with chi and gamma 1 chains from the parental X63 cells and specific L and H chains from the lymphoid parent. These biological investigations demonstrate the relative stability of the PO 772 C2 clone secreting anti-peroxidase antibody.
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PMID:Anti-peroxidase antibody-secreting hybrid lines. I. Identification, cloning and cell characterization. 37 90

Two different methods, immunofluorescence and lactoperoxidase-catalysed radioiodination, were used to investigate mIg on two different myeloma cell lines. The data indicate that, even though both techniques are highly sensitive, different results can be obtained in the same cell line depending on the technique employed.
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PMID:Membrane immunoglobulin on mouse myeloma cells: discrepancies in the detection of membrane IG by two different methods. 76 90

A human-mouse hybridoma has been produced by fusion of Hashimoto thyroid lymphocytes with the mouse myeloma line X63-Ag8.653. The cloned hybridoma secreted 2.5 micrograms per 10(6) cells per day of an IgG kappa thyroid peroxidase (TPO) autoantibody (2G4) with high affinity (2.5 x 10(9) molar-1) and specificity for human TPO. 2G4 did not react with lactoperoxidase, horseradish peroxidase or human myeloperoxidase or with porcine TPO or with human thyroglobulin. Plastic tubes coated with 2G4 bound about 50% of 125I-labelled human TPO added and the binding was inhibited by IgGs prepared from 18/18 TPO autoantibody-positive sera. This indicated that all 18 sera contained autoantibodies which recognised the same (or closely related) epitope as 2G4. Plastic tubes coated with IgGs from different TPO autoantibody-positive patient sera also bound 125I-labelled TPO but inhibition by 2G4 in this system was not complete. This suggested that the sera contained at least 2 types of TPO autoantibodies, with only one type of autoantibody reactive with the same epitope as 2G4.
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PMID:Production and characterisation of a human monoclonal thyroid peroxidase autoantibody. 128 77

To simplify the labor-intensive process of making hybridomas, we fused popliteal lymph node cells, used an autoclavable serum-free culture medium throughout, and cloned hybridomas with human blood cell feeders. To make the best possible use of the serum-free medium, we adapted mouse myeloma cells to it. Using as little as 0.2 ml of human blood per culture plate, we successfully cloned hybridomas and established a hybrid cell line producing anti-peroxidase antibody. Our protocol affords a considerable saving on time, labor, and cost, and hopefully will encourage the forensic scientist to undertake the production of monoclonal antibodies.
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PMID:Efficient methods for production of monoclonal antibodies for forensic applications. 130 46

A case of leukemic multiple myeloma with IgG-lambda type, which plasma cells in the peripheral blood and the bone marrow had large vacuolar inclusions is reported. A 67-year-old male was admitted because of bone pain. A diagnosis of leukemic multiple myeloma of IgG-lambda type was established, based on Bence Jones proteinuria (1.5 g/day), marked plasmacytosis in peripheral blood (63%) and bone marrow (90%), serum M-component (IgG-lambda type, 6.0 g/dl) and multiple osteolytic lesions. Most plasma cells in the bone marrow as well as in the blood had vacuolar inclusions in the cytoplasm which were 1-8 microns across and were negative with PAS and myeloperoxidase staining. Acid phosphatase reaction was distributed densely around vacuolar inclusions and sparsely within them in the form of fine granules. Ultrastructurally, most of the vacuolar inclusions were electron-lucent cytoplasmic spaces, encircled in a distinct limiting membrane, in which inner microvesicles were distributed diffusely. A few vacuoles showed fibrillary structures. These findings suggested that the lysosomal system might play a major role in the vacuolation of these plasma cells.
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PMID:[Vacuolar inclusions with multivesicular structure in leukemic multiple myeloma]. 132 2

A hybrid hybridoma (quadroma), secreting antibodies with double specificity to alpha-endorphin (alpha-EP) and horseradish peroxidase (HRP), has been produced. The bispecific antibodies constituted about 28-29% of all immunologically active IgG, produced by quadroma. The quadroma was isolated by fusion of two mouse hybridomas (anti-HRP and anti-alpha-EP) with distinct phenotypes: double mutant AMDR/HAT(S), and wild type (AMDS/HATR). A novel strategy for the construction of a double-mutant was applied, based on the use of an actinomycin D-resistant (AMDR) mouse myeloma for initiation of one of the parental hybridomas.
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PMID:Construction of a quadroma to alpha-endorphin/horseradish peroxidase using an actinomycin D-resistant mouse myeloma cell line. 135 18

Peripheral blood mononuclear cells (PBMC) from 13 healthy hepatitis B vaccines were transformed with the Epstein-Barr virus (EBV) and lymphoblastoid cell lines (LCL) producing antibodies to hepatitis B surface antigen (anti-HBs antibodies). Seven LCL and two clones secreting human anti-HBs monoclonal antibody were generated and their antibodies purified. One clone was fused with a mouse myeloma and the antibody from a cloned anti-HBs secreting heterohybridoma purified. One of the 10 purified human anti-HBs antibodies was characterized as IgG4, the remainder were IgG1. The antibodies had either kappa or lambda light chains. Five of the antibodies which were conjugated to horseradish peroxidase recognised the "a" group determinants.
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PMID:Development and characterization of human anti-HBs antibodies. 137 11


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