Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0024141 (systemic lupus erythematosus)
 44,322 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Luminol-dependent chemiluminescence of whole blood (whole blood CL) was developed to estimate the phagocytic function of granulocytes and the serum opsonin activity simultaneously. Whole blood (0.1 ml) was examined directly and results were obtained within 20 minutes. Phagocytic function of granulocytes can be estimated from the peak CL of whole blood and the number of granulocytes in a specimen, and the opsonin activity from the amount of time the peak CL is shown after the addition of nonopsonized CL inducer (nonopsonized zymosan). Subsequently, whole blood CL was measured to evaluate phagocytic functions in children with disease. Patients with chronic granulomatous disease showed no CL, and one of their mothers (1/3) showed low CL, suggesting she is a carrier. Two patients with hypocomplementemia (SLE and chronic nephritis) showed low serum opsonin activity, and phagocytic function of their granulocytes was enhanced. In cord blood and newborn infants serum opsonin activity was low, and phagocytic function of granulocytes was slightly decreased in cord blood but not in newborn infants. Patients with systemic bacterial infections showed an increased phagocytic function of granulocytes. Anti-cancer drugs decreased serum opsonin activity in children with leukemia or lymphoma. The children treated with L-asparaginase had very low opsonin activity, suggesting the drug inhibits complement synthesis. The measurement of whole blood CL was useful for monitering the phagocytic functions of blood after granulocyte transfusion.
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PMID:[Chemiluminescence of whole blood--analysis of the kinetics and application of clinical examination of phagocytic functions of whole blood from various type of diseases]. 355 74

Optimum conditions were established for the assay of cold lymphocytotoxic antibodies (cLCTA) in serum from patients with systemic lupus erythematosus (SLE). The optimum temperature of the incubation step with complement was 15 degrees C. For target cells incubated with dextran a significantly higher percentage of damaged cells (p less than 0.005), a faster rate of cell damage (p less than 0.001) and a requirement for less complement was observed than for target cells not incubated with dextran. Under optimum conditions in the cytotoxicity assay, 62% of SLE sera damaged more than 60% of the target cells, whereas 73% of the sera from control donors damaged less than 20% of the target cells. In multiple serum samples obtained during follow-up of 30 patients with SLE, the serum cytotoxic activity or titer of cLCTA fluctuated and did not relate to clinical symptoms of disease activity. In sera obtained during active disease the cytotoxic activity was related to the anti-dsDNA antibody level and with levels of circulating immune complexes measured by the Raji cell assay and the indirect granulocyte phagocytosis test. We found no restricted reactivity of cLCTA against phenotypically distinct T-lymphocyte subpopulations with different immunoregulatory functions. The reactivity pattern of cLCTA towards the various T-lymphocyte subpopulations was not related to disease activity. We conclude that cLCTA in patients with SLE represent an epiphenomenon, being the result of a hyperreactive B-cell system rather than the cause of the disease.
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PMID:Cold lymphocytotoxic antibodies in systemic lupus erythematosus. 633 85

Occurrence of autoantibodies against nuclear material was compared in groups of patients with rheumatoid arthritis (RA n = 22), systemic lupus erythematosus (SLE n = 24), osteoarthrosis (OA n = 25), and chronic schistosomiasis mansoni (CSM n = 28). Anti-ds DNA antibody was detected by an ammonium sulphate precipitation radioimmunoassay antibodies against extractable nuclear antigen (ENA) were detected and differentiated in RNAse-resistant and RNAse-sensitive components (Sm and RNP antigens) with an ELISA technique. IgG organ-non-specific and granulocyte-specific antinuclear antibodies (ANA) were detected by immunofluorescence technique with quantitative titration of positive reactions and determination of complement-fixing properties. The results in groups of patients with SLE, RA and OA were of confirmative nature and supported that the different methods detect different systems of autoantibodies and nuclear autoantigens. In CSM it was demonstrated that 23 of 28 cases had positive reactions to the RNAse-resistant part of ENA (the Sm-antigen), a significant difference from the three other groups of patients (P less than 0.001). The antibody was in all cases of IgM class, in seven cases also of IgA class. Antibodies against nuclear material in CSM are probably a consequence of heavy disturbance of the immune system in this chronic infection with great permanent antigen load. It is a matter of discussion, whether production of these antibodies is induced by nuclear material from the host or from the parasite.
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PMID:Antibodies against nuclear components in schistosomiasis. Results compared to values in patients with rheumatoid arthritis, systemic lupus erythematosus, and osteoarthrosis. 636 27

We have investigated the use of 111Indium granulocyte scanning, which would be expected to identify areas of perivascular or generalized neutrophil infiltration, in patients with collagen-vascular diseases suffering from either gastrointestinal symptoms (diarrhea or abdominal pain in 15 patients) or otherwise unexplained fever (six patients). Among patients with gastrointestinal symptoms, seven of 15 had positive scans suggesting large or small bowel involvement--three of three patients with Behcet's syndrome, four of five with vasculitis, no patient in six with systemic lupus erythematosus, and no patient with Churg-Strauss syndrome. Among patients without gastrointestinal symptoms, only one patient with polyarteritis nodosa had a positive scan, showing both large and small intestinal involvement. White cell scanning offers a noninvasive, readily tolerated technique for identifying inflammatory involvement of the intestine in patients with collagen-vascular disorders. Gastrointestinal involvement is rare in the absence of symptoms; and among symptomatic patients, inflammatory involvement of the gut is more likely to be found in patients with vasculitis or Behcet's.
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PMID:Noninvasive investigation of the gastrointestinal tract in collagen-vascular disease. 650 10

Reticuloendothelial system (RES) Fc receptor-mediated immune clearance was measured in 18 patients with systemic lupus erythematosus (SLE). Only two patients, with major disease activity, had a prolonged T 1/2 of the blood disappearance curve of injected IgG coated red cells in comparison to 22 healthy controls. Circulating immune complexes (CIC) were studied with three methods: PEG precipitation, C1q-ELISA and the indirect granulocyte phagocytosis test (IGFT). The T 1/2 of the blood disappearance curve related significantly to the IGFT (r = 0.55, P less than 0.05) and not to the PEG and C1q-ELISA test. Although HLA-DR3 phenotype frequency was significantly increased in our SLE population (P less than 0.05), it was not related to Fc receptor function. Similarly, HLA-DR2 phenotype was not related to RES Fc receptor function. These data do not support the concept that a genetic HLA linked defect in reticuloendothelial Fc receptor function is a primary cause of SLE, predisposing the inflicted individual to immune complex deposition. However, Fc receptor-mediated immune clearance seems to be related to disease activity itself and to levels of CIC.
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PMID:Reticuloendothelial Fc receptor function in SLE patients. I. Primary HLA linked defect or acquired dysfunction secondary to disease activity? 658 55

The pathogenesis of granulopoietic failure in systemic lupus erythematosus (SLE) was studied. In 16 Japanese women with SLE, a decreased number of granulocyte/monocyte progenitor cells (CFU-C) in the bone marrow was demonstrated, and the number of CFU-C correlated significantly with the peripheral blood granulocyte/monocyte count. The peripheral and bone marrow T lymphocytes suppressed the colony formation of autologous or allogeneic bone marrow CFU-C. These findings suggest that the decreased marrow CFU-C may be due to suppression by T lymphocytes, an event that may play an important role in the pathogenesis of granulopoietic failure in SLE.
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PMID:Granulopoiesis in systemic lupus erythematosus. 660 85

We applied a radiolabeled antiglobulin test to a study of patients with a variety of neutropenic disorders. After defining the nature of the interaction of radiolabeled anti-IgG with the neutrophil, we studied 16 patients with neutropenia of uncertain etiology and adequate bone marrow granulocyte precursors. Twelve of these 16 patients had increased neutrophil-associated IgG (PMN-IgG). Patients with the highest levels of PMN-IgG had the lowest neutrophil counts. The majority of patients with neutropenia and increased PMN-IgG had an underlying immunologic disorder that included immune thrombocytopenic purpura in 5 patients and autoimmune hemolytic anemia in 1 patient. In some patients, elevated PMN-IgG preceded other evidence for immunologic disease. The direct antiglobulin test helped to distinguish neutropenic patients with increased PMN-IgG both from patients with neutropenia due to a known nonimmune disorder and from nonneutropenic patients with rheumatoid arthritis or systemic lupus erythematosis. Each of four patients with increased neutrophil-associated IgG treated with systemic corticosteroids responded clinically with an associated fall in neutrophil IgG and a rise in the circulating neutrophil count. The radiolabeled antiglobulin test appears useful in defining a subpopulation of patients with neutropenia due to an underlying immunologic disorder.
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PMID:Granulocyte-associated IgG in neutropenic disorders. 697 94

We have previously shown that complement (C) activated plasma causes granulocyte (PMN) aggregation in vitro and that C5a is responsible. The C-induced aggregation of PMNs treated with cytochalasin-B (CB) is markedly enhanced and irreversible, and the magnitude of the response is proportional to the log (concentration of activated plasma), allowing use of this technique to detect C5a and hence C-activation. To compare the sensitivity of granulocyte aggregometry to that of more standard methods of detecting C-activation, we produced graded C-activation in vitro by treating fresh serum with varying amounts of zymosan. Aggregometry was the most sensitive index of C-activation, detecting C-activation, produced by 0.02 mg zymosan/ml of serum--1/10 that required to produce C-activation detectable by C3 immunoelectrophoresis (the next most sensitive technique). Granulocyte aggregometry may also be used to detect in vivo C-activation. We have found aggregating activity in plasmas from patients with systemic lupus erythematosus, immune vasculitis, transfusion reactions, and other conditions associated with in vivo C-activation, but not in the plasmas of normal subjects.
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PMID:Granulocyte aggregometry: a sensitive technique for the detection of C5a and complement activation. 699 Oct 24

The inhibiting activity of serum on haematopoiesis has been described in patients with SLE. To explore further the features of serum inhibitor, we first examined the suppression of granulocytic and erythroid colony formation in vitro by serum from patients with SLE using methylcellulose culture. The potent inhibiting activity was demonstrated in six of 20 patients. All of these six patients were associated with leukocytopenia and/or anaemia. Five of 10 sera from patients with active SLE suppressed the colony formation of both burst-forming units of erythrocyte (BFU-E) and colony-forming units of granulocyte/macrophage (CFU-GM), and one serum suppressed BFU-E only. IgG fraction isolated from sera with inhibiting activity suppressed colony formation without complement involvement. The elimination of monocytes and lymphocytes from target mononuclear cells did not affect the suppression by the IgG fractions. The suppressive effect was completely eliminated after incubation of the IgG fractions with progenitor-enriched mononuclear cells. Flow cytometric analysis showed these IgG bound to CD34+ haematopoietic progenitor cells, but not to CD33+ cells. These data suggest that (i) the inhibitor of colony formation in serum was observed in IgG fraction; (ii) its suppressive effect on colony formation was mediated by neither monocytes and lymphocytes nor complements; and (iii) IgG fraction could bind to primitive haematopoietic progenitor cells and suppress the growth of these cells. Thus, IgG autoantibodies to primitive haematopoietic progenitor cells are demonstrated to be present in the sera of a significant proportion of active SLE patients with anaemia and leukocytopenia and to suppress the progenitor cell growth.
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PMID:Suppression of haematopoiesis by IgG autoantibodies from patients with systemic lupus erythematosus (SLE). 753 26

The expression of adhesion molecule Leukocyte Function Antigen-1 (LFA-1) on peripheral blood leukocytes was evaluated (using a monoclonal antibody anti CD11a/LFA-1) in 52 spondylarthropathies (SA) (35 HLA B27 positive), 12 healthy patients, 24 active rheumatoid arthritis (RA) and 12 systemic lupus (SLE) patients. LFA-1 expression on lymphocytes was similar in the different groups of patients, but LFA-1 expression on granulocytes was higher in SA than in controls (p < 0.05) or in RA or SLE. Fluorescence intensity of anti LFA-1 staining on SA granulocytes correlated with serum IgA levels. There was no difference between HLA B27 positive/negative, biologically inflammatory (CRP > 21 mg/l)/non inflammatory SA patients. This study seems to confirm the granulocyte and IgA involvement in immunopathogenesis of spondylarthropathies.
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PMID:[Leukocyte expression of the LFA-1 adhesion molecule in spondylarthropathies]. 800 Mar 97


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