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

A combination of doxorubicin ('Adriamycin") and B.C.N.U. (1,3 di[2-chloroethyl]-1-nitrosourea) (30 mg/m2 of each intravenously every 3-4 weeks) was used to treat thirteen multiple-myeloma patients who did not respond or were in relapse after remission produced by alkylating-agent/prednisone therapy. All cases were staged according to total-body myeloma-cell number and followed quantitatively for response to therapy. Seven of the thirteen patients responded (54%). Two had complete clinical remissions and a greater than 75% reduction in tumour-cell mass lasting 12 and 16 months. Five others had partial remissions with lesser degrees of tumour-mass reduction and bone pain and improved haemoglobin and serum-albumin concentrations. Toxicity was limited to occasional myelo-suppression, mild alopecia, and nausea. The results indicate the usefulness of doxorubicin/B.C.N.U. for myeloma patients who have relapsed during previously effective alkylating-agent therapy.
 ...
PMID:Doxorubicin/B.C.N.U. chemotherapy for multiple myeloma in relapse. 5 35

Serum beta2-microglobulin levels were measured by radioimmunoassay in patients with various malignant neoplasms, ascitic patients, and also patients with definite or suspected hepatoma showing variable levels of serum alpha-fetoprotein. Elevated serum beta2-microglobulin levels greater than 2.5 mg/liter were found in various malignant neoplasms, especially in multiple myeloma (66.6%) and hepatoma (60.4%) The ascites/serum ratio of beta2-microglobulin levels in the patients with malignant ascites is significantly higher than in those with non-malignant ascites. However, ascites/serum ratios of total protein, IgG, albumin, creatinine levels were not significantly different between the two groups. Levels of serum beta2-microglobulin were correlated well with those of alpha-fetoprotein in the patients with definite or suspected hepatoma (r=0.72, P less than 0.001). From these results it was concluded that (1) high levels of serum beta2-microglobulin in these patients could be attributed to its hyperproduction by tumor cells or by the cells which had been infiltrated and activated, (2) it is useful to estimate the ascites/serum ratio of beta2-microglobulin levels in differentiating malignant from non-malignant ascites, and (3) it might suggest that a function of beta2-microglobulin is in some way related to that of alpha-fetoprotein, and the alpha-fetoprotein-synthesizing cells secrete a great deal of beta2-microglobulin, although its function remains unclear.
 ...
PMID:Beta2-microglobulin levels of serum and ascites in malignant diseases. 8 Mar 42

The data are presented concerning the qualitative changes in cattle immunoglobulin G with lymphoid leukosis. Protein peculiar to cattle leucosis is shown to be an immunoglobulin G subfraction which is washed out of the DEAE-cellulose column by 0.1 M of NaCl. Its molecular mass is 130,000 Daltons. The data of immunoelectrophoresis and ultracentrifugation show that it is homogeneous. The protein sedimentation constant is 7.2 S. The electrophoretic mobility is 0.18-0.19 of bull albumin mobility. The amino acid analysis of this protein shows that the content of methionine in it is more than 20% lower. This evidences for its similarity to protein characteristic of myeloma and Shvets leukosis in rats. This manifests similarly of proteins peculiar to different forms of malignant growth. This protein has common antigenic determinants with the protein peculiar to human malignant growth.
 ...
PMID:[Composition and properties of immunoglobulin G in cattle with lymphatic leukemia]. 8 55

Fusion of unfractionated human lymphocytes with mouse myeloma cells resulted in proliferating hybrid colonies, almost all producting human Ig. We examined whether this high frequency of Ig production was the result of selective formation of human B lymphocyte-mouse myeloma hybrids, rather than induction of Ig genes in T lymphocytes. Unfractionated peripheral lymphocytes and B lymphocytes from patients with the common variable form of agammaglobulinemia formed proliferating somatic cell hybrid colonies. In contrast, peripheral lymphocytes from a patient with agammaglobulinema who lacked B lymphocytes, as well as albumin gradient fractions of peripheral blood which do not contain B lymphocytes, failed to produce somatic cell hybrids with three different myeloma parent cell lines. B, T, and precursor lymphocytes all had Sendai virus receptors, as witnessed by viral agglutination. We conclude that fusion of human lymphocytes with mouse myeloma cells results in selective hybrid formation, rather than activation of Ig genes in disparate cell types. Only B lymphocyte-mouse myeloma heterokaryons form hybrid cells.
 ...
PMID:Human lymphocyte-mouse myeloma somatic cell hybrids: selective hybrid formation. 30 22

A patient with gamma A myeloma, hyperviscosity and an obstructive uropathy is described. Operation revealed a proteinaceous mass obstructing the right renal pelvis. Immunoprecipitin and immunofluorescent analysis of this mass and concentrated urine demonstrated the presence of gamma A myeloma protein, kappa light chains and albumin. This is the first description of an obstructive uropathy in multiple myeloma owing to a proteinaceous matrix containing paraprotein.
 ...
PMID:Gamma A myeloma with hyperviscosity and obstructive uropathy. 32 14

Dinitrophenyl-bovine albumin was coupled at room temperature to sheep red blood cells in a procedure which minimized spontaneous lysis and allowed the preparation of large batches and their use for at least 3 weeks. The modified erythrocytes were used as a substrate for detecting local hemolytic plaques in agar by myeloma MOPC 315 cells, which secrete a paraprotein IgA with high affinity for dinitrophenyl ligand. Conditions maximizing the number of plaques formed by a given number of tumor cells were found to include coupling the erythrocytes at 1 mg/ml dinitrophenyl-bovine albumin with a molar ratio of about 50, and incubation with an amino-to-carboxy cross-linking agent, 1-ethyl-3(3 dimethyl aminopropyl) carbodiimide, at 2 mg/ml for 50 min. The method thus developed was employed to measure cellular and antibody-dependent immune reactions against the MOPC 315 cells. The experimental results show comparisons of the plaque technique with other measurements of tumor cell injury. The nature of the assay, which requires only 500 cells per plating, and which tests the synthetic capacity of single cells, suggests its use in experiments which limit the number of target cells, and in immune reactions causing injury, but not necessarily lysis, of the target cells.
 ...
PMID:An improved plaque assay for mouse myeloma (MOPC 315) cells for use in studies of humoral and cell-mediated immunity. 33 26

A bone biopsy specimen from a patient with multiple myeloma showed numerous Gaucher-like cells scattered throughout a homogeneous background of plasma cells. Further studies using histochemical stains, immunofluorescence, and light and electron microscopy were carried out to further define these cells. Light microscopy of Wright-stained and hematoxylin and eosin-stained marrow preparations showed large, round cells with fibrillar appearing cytoplasm and eccentric, pyknotic nuclei. These cells were periodic acid-Schiff positive, resistant to diastase digestion. Electron microscopy demonstrated plasma cells containing crystals in membrane-bound vesicles. Also, large macrophages among these plasma cells contained similar crystals surrounded by a single limiting membrane. Immunofluorescence staining of thin sections of marrow with fluorescein-labelled specific antiserums showed fluorescence of these large cells. Strong immunofluorescence was seen with polyvalent kappa and gamma antiserums but not with anti-albumin or serums with anti-lambda, mu or alpha specificity. It appears that these large cells have the light microscopic and histochemical characteristics of true Gaucher cells but, when studied with immunofluorescence and electron microscopy, it appears that the pseudo-Gaucher cells of multiple myeloma are bone marrow macrophages engorged with immunoglobulin.
 ...
PMID:Pseudo-Gaucher cells in multiple myeloma. 38 Mar 39

Sera, purified myeloma proteins, and urinary proteins obtained from eight patients with igA multiple myeloma were studied by physical-chemical and immunochemical methods. In six patients whose serum viscosity was increased, the sedimentation constants of the principal component of myeloma proteins ranged from 9.1 to 10.2 S. In two patients with nearly normal serum viscosity, the sedimentation constants of these proteins were 6.2 and 7.2 S. IGA-albumin complexes were detected in most of the sera, but invarying amounts; no complexes of ig with amylase, secretory component, or alpha(1)-antitrypsin were observed. Studies on isolated myeloma proteins revealed that all igA proteisn from sera with increased viscosity represented true polymers, linked by disulfide bonds, rather than noncovalently associated aggregates; J chain was detecable by both alkaline-urea disc electrophoresis and immunoelectrophoresis with a monospecific anti-J chain serum. Increased serum viscosity was not related to the igA subclass, L chain type, or the carbohydrate compositions of individual igA myeloma proteins. The urine of five patients contained free light chains corresponding in type to the light chain of the particular igA myeloma protein. However, free J chain was not detected. The immunoelectrophoretic analysis for the presence of J chain in sera of myeloma patients may be used for early and simple detection of polymeric forms of myeloma proteins.
 ...
PMID:Properties of IgA myeloma proteins isolated rom sera of patients with the hyperviscosity syndrome. 40 74

An assessment of free and total calcium measurements was made in 691 patients with suspected hypercalcemia or disorders often associated with hypercalcemia. In 18.9% of the 1049 specimens analyzed from nine different patient groups, a different impression of hypercalcemia was obtained depending on whether the free or total calcium was considered. Analysis of the ratio of free to total calcium indicated that there are two main factors which influence the distribution of calcium in the serum of hypercalcemic patients: the concentrations of albumin and parathyroid hormone. A lowered albumin concentration accounted for the altered distribution of calcium in patients with malignancies and partially accounted for the altered distribution in patients postrenal transplantation. In patients with confirmed primary hyperparathyroidism a higher ratio of free to total calcium was found, which could not be explained by alterations in protein, albumin, pH, or CO2 content but was related to parathyroid hormone concentration. Free calcium appears to be a slightly better indicator of elevated calcium states than total calcium. Measurements of free calcium should be particularly useful in patients with altered albumin concentration, with multiple myeloma in whom a calcium-binding protein could be present, after renal transplantation, and with suspected hyperparathyroidism and normal or slightly elevated total calcium values.
 ...
PMID:Relationship of free and total calcium in hypercalcemic conditions. 42 92

Three electrophoretic techniques are usually available in the clinical laboratories for the qualitative investigation of urinary protein patterns: 1) acetate cellulose, 2) immuno-electrophoresis; and 3) SDS-polyacrylamide gel electrophoresis. Proteinuria (the excretion of proteins in excess of 150 mg/day or 100 microgram/min) usually signifies either increased permeability of the glomerular-capillary membrane of diminished tubular reabsorption. Since glomerular disease is associated with an increased clearance of albumin and higher molecular weight proteins, whereas tubular damage is associated with the predominant excretion of proteins of lower molecular weight than albumin, it seems logical to establish a classification of proteinuria according to the molecular weight of its constituents. One can thus basically distinguish 5 types of proteinurias: 1) physiological; 2) tubular; 3) selective glomerular; 4) non selective glomerular; and 5) mixed proteinurias. Additionally one must distinguish "myeloma proteinurias" where monoclonal complete or incomplete gamma-globulins are found in the urine. Clinically it may be useful to determine the qualitatively normal or pathologic character of a quantitatively normal proteinuria, especially in the following conditions: 1) for early diagnosis of nephropathy in patients, such as diabetics, which are particularly prone to suffer from renal complications; 2) to confirm the clinical cure or to predict the recurrence of renal diseases; and 3) in such situations as orthostatic, or myeloma proteinuria, or any elevation of the urinary protein output of unknown etiology.
 ...
PMID:Clinical relevance of different electrophoretic methods for the analysis of urinary proteins. 44 73


1 2 3 4 5 6 7 8 9 10 Next >>