Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0026764 (multiple myeloma)
 36,148 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Total poly(A)-mRNA from polyribosomes of MOPC 21 mouse myeloma were investigated. Poly(A)-mRNA was released by two successive chromatography on oligo (dT)-cellulose. A 14S fraction of total poly(A)-mRNA was obtained and partially purified by sucrose gradient centrifigation followed by acrylamide gel electrophoresis. As estimated from the electrophoretic analysis, the 14S mRNA has three components, one of which appears to be 18S rRNA and two others--mRNAs with molecular weight of 5.2.10(5) and 3.8.10(5), respectively. Total poly(A)-mRNA and partially purified 14S mRNA were active when employed as a template in a reverse transcription and cell-free system from wheat germ. DNA complementary to the 14S mRNA was prepared with avian myeloblastosis virus RNA-dependent DNA polymerase. This cDNA was heterogeneous in size with the average size of about 800 nucleotides when analyzed by gel electrophoresis in 98% formamide. The maximal length was about 1100 nucleotides that consistent with full template length. About half of the translation product directed by the 14S mRNA migrated as mature L-chain Ig (upon polyacrylamide gel electrophoresis in sodium dodecylsulfate). The presented data suggested that 14S mRNA species contain mRNA L-chain Ig.
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PMID:[mRNA of mouse plasmacytoma. Reverse transcription and translation in cell-free systems]. 8 67

Polysomes producing IgGl(kappa) myeloma protein were specifically selected by an immunoprecipitation method, and immunoglobulin light chain mRNA was purified from the precipitated polysomes. The purified mRNA migrated predominantly as a single band and the molecular weight of this mRNA was calculated to be 410.000 by polyacrylamide gel electrophoresis in 98% formamide. A protein possessing a molecular weight of 25,000, which is the size of the light chain precursor, was synthesized as a major product of translation in a wheat germ cell-free system. DNA complementary to the mRNA (cDNA) was prepared with avian myeloblastosis virus RNA-dependent DNA polymerase. This cDNA had an average size of 8.3S as determined by sedimentation through an alkaline sucrose gradient. Using this cDNA, Crt 1/2 values of template RNA and RNA from various preparations were calculated from the results of molecular hybridization. The relative content of the mRNA increased 4,4-fold during the immunoprecipitation of polysomes.
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PMID:Purification of immunuglobulin light chain messenger RNA by immunoprecipitation from mouse myeloma tumor, MOPC-31C. 40 23

Immunoglobulin heavy chain mRNA was purified from immunoprecipitated polysomes derived from the mouse myeloma tumor, MOPC-31C. The purified mRNA migrated predominantly as a single band upon polyacrylamide gel electrophoresis in 98% formamide and the molecular weight of this mRNA was calculated to be 700,000. This mRNA was as active as the purified light chain mRNA when it was employed as a template in a cell-free protein synthesizing system from wheat germ. The translation product had a molecular weight of 55,000 daltons, and migrated slightly faster than mature heavy chain upon polyacrylamide gel electrophoresis in sodium dodecylsulfate. The protein synthesized by the direction of this mRNA was shown to yield tryptic peptides corresponding to those derived from the mature heavy chain protein except that one missing peptide was replaced by another additional peptide. DNA complementary to the mRNA was synthesized by RNA-dependent DNA polymerase from avian myeloblastosis virus. Hybridization kinetic analysis between the heavy chain mRNA and its complementary DNA indicated that the RNA was essentially homogenous with rabbit globin mRNA as a standard.
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PMID:Purification of immunoglobulin heavy chain messenger RNA by immunoprecipitation from the mouse myeloma tumor, MOPC-31C. 40 24

Ferritins are a group of isometric proteins having an important function in iron storage and metabolism and are found in high concentration in the liver, spleen and bone marrow. Acidic isoferritins are found in human fetal liver, primary mammary, gastric and pancreatic carcinomas, and are termed carcinofetal ferritins. Elevated levels of serum ferritin were found in patients with various malignant diseases such as Hodgkin's disease, chronic myeloblastic, granulocytic and lymphatic leukemias and myeloblastosis, in patients with breast cancer, multiple myeloma, malignant lymphoma, carcinoma of the gastro intestinal tract and germinal cell tumors of the testis. Recently a subpopulation of circulating T lymphocytes bearing surface ferritin was found in patients with breast cancer and untreated Hodgkin's disease. No such lymphocytes were demonstrated in normals or in patients with benign breast disease. The appearance of such subpopulation in the circulation is an early manifestation of the neoplastic disease, and its identification may provide a tool of potential diagnostic and prognostic importance in the management of Hodgkin's disease and breast cancer.
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PMID:The significance of ferritin in malignant diseases. 73 72

We investigated by molecular hybridization whether T cells contain RNA sequences homologous to RNA which codes for immunoglobulin kappa-chain (k-chain). A radioactive probe of complementary DNA (cDNA) was prepared by transcription of purified k-chain mRNA from mouse myeloma MOPC-41 with reverse transcriptase (RNA-dependent-DNA nucleotidyltransferase) from avian myeloblastosis virus. The cDNA probably corresponded only to the constant region and 3'-terminus of k-chain mRNA. Kappa-chain cDNA was found to hybridize efficiently with RNA from both thymus cells and an established culture of thymoma cells. The thymus and thymoma cells contained 99.8% and 100% theta-positive cells, respectively. Quantitatively the average thymus T cell (thymus derived lymphocyte) contained about one half as much k-chain mRNA as the average spleen B cell ("bursa" dependent lymphocyte), whereas the thymoma cells contained only 1/33 as much. Control hybridizations of k-chain cDNA with myeloma and liver RNA support the conclusion that T cells in the thymus and in the thymoma cell line synthesize k-chain mRNA-like molecules. The thermal stability of hybrids of k-chain cDNA with RNA from spleen, thymus, thymoma, and another k-chain producing myeloma tumor was lower than that with MOPC-41 RNA. This finding may be due to the existence of several slightly different ck genes in the mouse as suggested by various control experiments.
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PMID:Sequences related to immunoglobulin kappa chain messenger RNA in T cells. 82 Oct 55

Hybridomas were prepared by fusion of mouse myeloma cell line Sp2/0 with lymphocytes from mice immunized with avian myeloblastosis virus (AMV). The specificity of each monoclonal antibody was characterized by radioimmunoassay (RIA) using purified viral core proteins, immunoprecipitation of radioactively labeled virus (35S-methionine-labeled AMV, 125J-labeled AMV) and immunoblotting. One monoclonal antibody (IC11) which is of IgG1 subclass, and two other monoclonal antibodies (IF9 and IB8), both of IgG3 subclass, were directed against the p19 protein of AMV. The remaining eight monoclonal antibodies (most of them of IgM class) did not precipitate viral proteins under the experimental conditions used, except IIG12 hybridoma antibody which irregularly precipitated glycoprotein gp85. Since most of them (seven, including IIG12) gave positive reactions in RIA with antigenically unrelated influenza virus, these monoclonal antibodies were directed against virus components specified by chick cells (host cell antigen).
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PMID:Production and characterization of monoclonal antibodies against avian myeloblastosis virus. 631 35

Five hybridoma cell lines which secrete antibodies to avian leukosis/ sarcoma (ALV) group-specific (gs) antigens (gag gene products) have been established. The hybrid cells resulted from fusion of P3/X63-Ag8.653 myeloma cells with splenocytes of BALB/c mice which had been immunised with purified avian myeloblastosis virus (AMV). Screening of supernatant fluids was performed by an indirect double antibody sandwich enzyme-linked immunosorbent assay (IDAS-ELISA) and the immunoelectroblotting technique. Three hybrid clones secrete monoclonal antibodies (MCA) to 27,000 dalton polypeptides (p27) and two hybridomas produce monoclonal antibody directed to 19,000 dalton phosphoprotein (pp19). All five monoclonal antibodies belong to mouse immunoglobulin isotype IgG(1). MCAs directed to different ALV-p27 epitopes can replace polyclonal rabbit or hamster anti-gs sera in the DAS-ELISA in use for the detection of congenitally ALV-shedding hens. In albumen samples a 16- to 32-fold increase of sensitivity of ALV gs-antigen detection was obtained as compared to the DAS-ELISA employing polyclonal sera. Gs-antigens of a purified AMV preparation were detectable up to minimal concentrations of 13 pg/ml.
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PMID:Application of monoclonal antibodies in the avian leukosis virus GS-antigen ELISA. 1876 97