Abstract:
:We have shown previously that IgG2a anti-Thy-1 MoAb (ER4G) induces apoptosis of rat mesangial cells (GMC) in vitro. Since the classical complement pathway plays an essential role in Thy-1 nephritis, we analysed whether C1q, a subunit of the first component of complement, enhances the ER4G-mediated apoptosis of rat GMC. Two different subclasses of anti-Thy-1 MoAb, ER4G (IgG2a) and ER14 (IgG1), were used. It was established that ER4G binds C1q efficiently, while ER14 reacts poorly with C1q. For the experiments of apoptosis, quiescent rat GMC were exposed for 1 h at 37 degrees C to a fixed concentration of anti-Thy-1 MoAb and incubated further for 16 h at 37 degrees C in the presence or absence of C1q. GMC exposed to medium (M-GMC) followed by incubation of the cells with medium alone was used as controls. Apoptosis was assessed by morphological studies and quantitative analysis on FACS using FITC-annexin V (the annexin V methods) or bicolour FACS analysis using FITC-annexin V and propidium iodide (the annexin V/PI method). With the annexin V method, M-GMC revealed 9.4 +/- 1.4% apoptosis. C1q had only marginal effects on apoptosis of M-GMC. GMC exposed to ER4G (ER4G-GMC) and further incubated with medium in the absence of C1q resulted in 25.7 +/- 5.7% apoptosis (P < 0.01 relative to control). Incubation of ER4G-GMC together with 100 microg/ml of C1q significantly increased GMC-apoptosis up to 39.4 +/- 4.9% (P < 0.01 relative to ER4G-GMC incubated in the absence of C1q). This enhancing effect of C1q on apoptosis of ER4G-GMC was time- and dose-dependent. In contrast, C1q did not significantly alter the apoptosis of either GMC exposed to ER14 (ER14-GMC) or to F(ab')2-ER4G (F(ab')2-ER4G-GMC), while ER14-GMC or F(ab')2-ER4G-GMC incubated with medium resulted in significant apoptosis compared with control. These results were supported by morphological studies and bicolour FACS analyses in time course experiments using the annexin V/PI method. The effect of C1q is dependent on the presence of intact C1q-containing globular heads and does not occur with collagen-like fragments of C1q. Furthermore, incubation of ER4G-GMC with anti-mouse K-chain antibodies also increased ER4G-mediated GMC-apoptosis. These results indicate for the first time that C1q enhances antibody-mediated apoptosis of rat GMC in vitro, presumably by its binding to ER4G and probably by additional cross-linking of Thy-1 on the surface of GMC.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Sato T,van Dixhoorn MG,Heemskerk E,van Es LA,Daha MRdoi
10.1046/j.1365-2249.1997.4741372.xsubject
Has Abstractpub_date
1997-09-01 00:00:00pages
510-7issue
3eissn
0009-9104issn
1365-2249journal_volume
109pub_type
杂志文章abstract::The anti-lymphocyte autoantibody response to irradiated lethal Plasmodium berghei malaria parasites in normal mice was significantly reduced when recipients were pre-treated with splenic T cells from mice recovered from a non-lethal Plasmodium yoelii infection. Suppression was specific for the autoantibody and did not...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1983-10-01 00:00:00
abstract::Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immunodeficiency disease, characterized by low levels of circulating immunoglobulins and recurrent bacterial infections, particularly of the respiratory tract. T cell dysfunction is often present, and lymphoproliferative and autoimmune di...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2006.03086.x
更新日期:2006-06-01 00:00:00
abstract::The binding of anti-DNA antibodies to the endothelial cell is mediated through DNA, which forms a bridge between the immunoglobulin and the plasma membrane. We have shown that 32P-labelled DNA bound to the plasma membrane of human umbilical vein endothelial cells (HUVEC) by a saturable process, which could be competit...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1993.tb03363.x
更新日期:1993-01-01 00:00:00
abstract::Bullous pemphigoid is a blistering skin disease characterized by autoantibodies against the NC16a domain of bullous pemphigoid 180. This study was performed to characterize and map the fine specificity of T cell responses to NC16a. Peripheral blood mononuclear cells (PBMC) from a total of 28 bullous pemphigoid patient...
journal_title:Clinical and experimental immunology
pub_type: 临床试验,杂志文章
doi:10.1111/cei.12566
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abstract::Experimental autoimmune hepatitis (EAH) is an animal model for autoimmune hepatitis. The disease is T cell-mediated and runs a subacute course, with maximal disease activity around week four after disease induction and a slow ensuing recovery. The aim of the present study was to investigate the immunoregulatory mechan...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1993.tb05995.x
更新日期:1993-10-01 00:00:00
abstract::Granulocyte colony-stimulating factor (G-CSF) administration in vivo has been shown to improve the defence mechanisms against infection by different microbes. Here we evaluated a possible protective role of this molecule in a mouse model of mycobacterial infection. The administration of recombinant G-CSF promoted an e...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2001.01552.x
更新日期:2001-05-01 00:00:00
abstract::A hybridoma (FMC4) has been derived which secretes antibody showing selective reaction with human B lymphocytes, monocytes and some null lymphocytes. Few, if any, T lymphocytes in normal blood are stained, although stimulation of lymphocytes with PHA leads to an increase in the proportion of cells reacting with the hy...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1980-06-01 00:00:00
abstract::The kinetics and effects of in vivo spontaneous apoptosis and activation-induced cell death (AICD) upon CD4+ and CD8+ lymphocyte subsets and CD4 naive cell numbers were studied in HIV+ subjects with CD4 pretreatment values > 200/mm3, who were subsequently treated for 48 weeks with HAART alone or in combination with si...
journal_title:Clinical and experimental immunology
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-04-01 00:00:00
abstract::A proportion of human monocytes form long needles of fibrin on their surfaces when they are briefly exposed to human plasma. A number of coagulation factor deficient plasmas (II, V, VII, VIII, von Willebrand, IX, X, XI and XII) were tested for their ability to promote formation of this fibrin. Monocytes failed to make...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1983-09-01 00:00:00
abstract::Intraperitoneal infection of mice with mycobacteria induces the persistent mobilization of neutrophils to the infected peritoneal cavities. The recruitment of the neutrophils was mediated by the immune system since it was enhanced by immunization and reduced in T cell-deficient nude and SCID mice. Anti-mitotic treatme...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1992.tb06889.x
更新日期:1992-07-01 00:00:00
abstract::Plasmacytoid dendritic cells (pDCs) are of crucial importance in immune regulation and response to microbial factors. In multiple sclerosis (MS), pDCs from peripheral blood showed an immature phenotype, but its role in susceptibility to MS is not determined. Because infectious diseases are established triggers of exac...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2009.03964.x
更新日期:2009-09-01 00:00:00
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1986-02-01 00:00:00
abstract::The human immune response to the 10-kD M. tuberculosis protein was studied by a competition ELISA using monoclonal antibody (MoAb) SA-12. Twenty-five per cent of the sera from 20 patients with tuberculosis and none from 21 control subjects inhibited binding of SA-12 to the 10-kD antigen. To characterize the antigenic ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1991.tb05765.x
更新日期:1991-10-01 00:00:00
abstract::We have demonstrated that mannose-binding lectin (MBL) recognizes various slow-growing, pathogenic mycobacteria [Mycobacterium tuberculosis (MTB), M. bovis, M. kansasii, M. gordonae] as well as non-pathogenic M. smegmatis. Recognition resulted in activation of the lectin pathway (LP) of complement and an enhancement o...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/cei.12416
更新日期:2014-11-01 00:00:00
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journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2005.02792.x
更新日期:2005-05-01 00:00:00
abstract::One of the hallmarks of coeliac disease, both active and treated, is an increased number and proportion of gamma/delta intraepithelial T lymphocytes in the small intestinal mucosa, and an increased number of gamma/delta T cells in the small intestinal mucosa of coeliac disease patients has been associated with the inh...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.1997.d01-887.x
更新日期:1997-01-01 00:00:00
abstract::We have reported previously that the LAD-4 monoclonal antibody (mAb) directed against a fibronectin receptor (FNR) on RL-male-1 T lymphoma cells in BALB/c mice partially inhibited their migration to the liver. In the present study, we examined the mechanism by which another anti-FNR mAb, LAD-1, exerts its antitumourig...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2005.02809.x
更新日期:2005-07-01 00:00:00
abstract::In normal subjects, factor B and C3b inactivator (KAF) levels were linearly related (r = 0-71); factor B levels in subjects with low normal levels of KAF were significantly lower than in those with high normal levels of KAF. This relationship is postulated to be the result of modulation by the level of KAF of the avai...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1977-04-01 00:00:00
abstract::Neutrophils maintain immune homeostasis by engulfing apoptotic cells and debris. We describe the rapid activation of neutrophils after engulfing hemoglobin (Hb)-activated platelets, which are abundant in the circulation of hemolytic patients. Neutrophils from healthy individuals after engulfing Hb-activated platelets ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/cei.13310
更新日期:2019-08-01 00:00:00
abstract::IgE rheumatoid factor activity was found to be significantly elevated (P less than 0.01) using an ELISA assay when paired synovial fluid and sera from 13 patients with active RA were compared to ten control samples. Synovial fluid IgE RF activity was higher than predicted by diffusion alone in 7/11 (64%) of the RA syn...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1988-02-01 00:00:00
abstract::Using the natural killer (NK) sensitive K562 cell line, enhanced NK cell cytotoxicity was demonstrable early in the course of acute hepatitis B while normal values were obtained in patients studied during convalescence. No evidence of enhanced NK activity was instead obtained in the course of acute non-A, non-B hepati...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1986-04-01 00:00:00
abstract::The relationship between allergic airway inflammation and pneumococcal pneumonia is not well understood. We assessed susceptibility to experimental pneumococcal pneumonia in mice with and without allergic airway inflammation. Susceptibility to pneumococcal pneumonia was evaluated by challenging mice with a bioluminesc...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2009.03925.x
更新日期:2009-06-01 00:00:00
abstract::Increasing evidence has demonstrated that the immune system closely interacts with other physiological systems, whose communications are mediated by circulating cytokines and hormones. The aim of our study was to test whether the number and cytolytic activity of NK cells in a group of relatively healthy Italian nonage...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.1999.00855.x
更新日期:1999-04-01 00:00:00
abstract::The hydrodynamic (gel filtration and sedimentation) properties of an isolated monoclonal IgM-K cryoglobulin (McE.) and five non-cryoglobulin cold-soluble proteins, as well as their constituent monomeric subunits and (Fc)5mu and Fabmu fragments, are compared under both native and partially denaturing conditions. It is ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1978-01-01 00:00:00
abstract::Incubation with thymosin fraction 5, (TMS F5 at 300 micrograms/ml) a partially purified thymic factor, reduced the steroid binding activity of human infant thymocytes from 9.6 +/- 2.1 fmole/ml to 5.0 +/- 2.0 fmole/ml. The glucocorticoid receptor activity in normal infant thymocytes was found to be 2,146 +/- 726 (s.d.)...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1984-02-01 00:00:00
abstract::T cells of C57BL/6J (B6) mice activated in vitro against the K and D determinants of the H-2d haplotype, and expanded in tissue culture in the presence of interleukin 2, were capable of rapidly killing lethally irradiated BALB/c recipients when injected intravenously. Mice given 10(6), 10(7) and 10(8) such T cells sur...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1982-12-01 00:00:00
abstract::Mixed cryoglobulinaemia (MC) is a disorder characterized by the presence of large amounts of cryoprecipitating IgM-IgG complexes. An immune complex glomerulonephritis develops in one third of all patients, but its occurrence does not seem related to the amount of cryoglobulins in the sera, nor to their complement-fixi...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1994.tb06560.x
更新日期:1994-05-01 00:00:00
abstract::Lung cancer is strongly associated with cigarette smoking. More than 20 lung carcinogens have been identified in cigarette smoke and one of the most abundant is 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK). We hypothesized that NNK modulates alveolar macrophage (AM) mediator production, thus contributing to ca...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2003.02142.x
更新日期:2003-05-01 00:00:00
abstract::Intestinal epithelial cell (IEC)-derived cytokines, such as stem cell factor (SCF), interleukin (IL)-7 and IL-15 are known to be required for the development of intestinal intraepithelial lymphocytes (IELs). A newly described cytokine, IL-18, has also been shown to be produced by intestinal epithelial cells. To demons...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2004.02431.x
更新日期:2004-05-01 00:00:00
abstract::The requirement for specificity of antibody-dependent inhibition or killing of intracellular Toxoplasma gondii trophozoites by normal mouse peritoneal macrophages was evaluated in vitro using light microscopy and autoradiography. Anti-toxoplasma antibody in the presence of 'accessory factor' rendered extracellular T. ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00