Abstract:
:Regulatory B (Breg ) cells are characterized by various membrane markers and the secretion of different inhibitory cytokines. A new subset of Breg cells was identified as CD5hi Fas-ligand (FasL)hi . Their main reported role is to suppress anti-viral and anti-tumour immune responses, and, hence they have been dubbed 'killer' B cells. In this study, we aim to assess the role of these cells in chronic hepatitis C virus (HCV) infection, and determine if they contribute to the increased viral load and persistence of HCV and its related autoimmunity. (i) FasL expression on CD5hi B cells is increased significantly in HCV-infected patients compared to healthy individuals [28·06 ± 6·71 mean fluorescence intensity (MFI) ± standard error of the mean (s.e.m.), median = 27·9 versus 10·87 ± 3·97 MFI ± s.e.m., median = 10·3, respectively, P < 0·0001]. (ii) Killer B cells from HCV patients increased autologous CD4+ T cell apoptosis compared to the apoptosis in healthy individuals [39·17% ± 7·18% mean ± standard deviation (s.d.), median = 39·6 versus 25·92 ± 8·65%, mean ± s.d., median = 24·1%, P < 0·0001, respectively]. A similar increase was observed in CD8+ T cell apoptosis (54·67 ± 15·49% mean ± s.d., median = 57·3 versus 21·07% ± 7·4%, mean ± s.d., median = 20%, P = 0·0006, respectively). (iii) By neutralizing FasL with monoclonal anti-FasL antibodies, we have shown that the induction of apoptosis by killer B cells is FasL-dependent. (iv) Increased expression of FasL on CD5hi B cells is correlated positively with an increased viral load and the presence of anti-nuclear antibodies and rheumatoid factor in HCV. This is the first study in which killer B cells have been suggested to play a pathogenic role in HCV. They seem to be involved in HCV's ability to escape efficient immune responses.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Eiza N,Zuckerman E,Carlebach M,Rainis T,Goldberg Y,Vadasz Zdoi
10.1111/cei.13139subject
Has Abstractpub_date
2018-08-01 00:00:00pages
183-193issue
2eissn
0009-9104issn
1365-2249journal_volume
193pub_type
杂志文章abstract::Two facts support the definition of idiopathic thrombocytopenic purpura (ITP) as an immune disorder. First, antibodies against platelets, which often appear after a viral infection, provoke the increased elimination of these cells. Viral disease may change the complex immune response of the host at different levels. I...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章,评审
doi:
更新日期:1994-07-01 00:00:00
abstract::Atopic disorders are caused by disregulated activation of T helper 2 (Th2) cells that produce IL-4 and IL-5. Because the presence of IL-4 potently augments the differentiation of naive T cells into Th2 cells, it is important to seek the cell population which provides IL-4 for naive T cells. Recently, a unique subpopul...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2000.01157.x
更新日期:2000-03-01 00:00:00
abstract::Here we describe the presence of IgG antibodies, in the sera of patients presenting with insulin-dependent diabetes mellitus (IDDM), that react in Western blots with a 60-kD protein (Mr 60K) from rat hepatic microsomal extracts. Sera from 60 IDDM patients were screened and 31.6% were positive for the Mr 60K band. This...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2000.01366.x
更新日期:2000-11-01 00:00:00
abstract::An attempt was made to correlate lymphocyte subset abnormalities with the development of experimental autoimmune thyroiditis (EAIT) in thymectomized and irradiated rats of five inbred strains. The peripheral blood subpopulations were analysed using the fluorescence-activated cell sorter (FACS-IV). A significant lympho...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1987-02-01 00:00:00
abstract::The influence of human seminal plasma (SP) and whole semen (S) on the expression of natural cytotoxicity by human peripheral blood mononuclear cells (PBMNC) was examined. Marked suppression of natural cytotoxicity against K562 targets was observed when effectors were pre-treated for 1 h with SP or S diluted up to 1:40...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1986-03-01 00:00:00
abstract::Serum activity of the adenosine deaminase (ADA) isozyme, ADA2, has been reported to be elevated during various disease states. Macrophages have been suggested as the cellular source of extracellular ADA activity because they are one of the only cell types in which intracellular ADA2 activity has been measured, but ext...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2004.02591.x
更新日期:2004-10-01 00:00:00
abstract::CFA is an inflammatory condition of the lungs resulting in scarring, pulmonary failure and death. The etiology of the disease is unknown, but the pathogenesis is believed to involve a persistent immunological reaction to unidentified antigen in the lung resulting in tissue damage. Recent advances in our understanding ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1995.tb03131.x
更新日期:1995-09-01 00:00:00
abstract::Hybridization of peripheral blood lymphocytes from patients with rheumatoid arthritis has yielded 14 monoclonal antibodies which react with cultured human epithelial cells. Immunofluorescence staining identifies at last five different types of antibody. Solid phase immunosorbent assays show a variety of cross-reaction...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1985-09-01 00:00:00
abstract::We have studied immunological, serological and clinical abnormalities in 264 HIV-positive and HIV-negative drug abusers. Ninety percent of the 264 drug addicts (mean age 26 +/- 0.8 years) were found to have HIV antibodies and there was a significant increase (P less than 0.01) in the frequency of HIV antibody positivi...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1988-05-01 00:00:00
abstract::Acute coronary syndromes (ACS) are associated with inflammation resulting from monocyte activation. We sought for differences in the production of pro- and anti-inflammatory cytokines by monocytes from patients with ACS. C-reactive protein (CRP) and neopterin were measured in 22 patients with acute coronary syndromes,...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2004.02602.x
更新日期:2004-11-01 00:00:00
abstract::Complement C6 has a common charge polymorphism designated A and B with gene frequencies of 0.65 and 0.35. The probable molecular basis for this is a Glu (C6A) for Ala (C6B) substitution at amino acid position 98, and is detected by digestion with the restriction enzyme Dde I of a polymerase chain reaction (PCR)-amplif...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1994.tb06536.x
更新日期:1994-02-01 00:00:00
abstract::Cutaneous T-cell lymphoma (CTCL) is a clonally derived, skin invasive malignancy of CD4+ cells with the phenotype of mature helper T cells. We previously demonstrated that the leukaemic form of CTCL (Sézary), is characterized by prominent immunological defects including depressed cell-mediated immunity. We also demons...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章,评审
doi:
更新日期:1997-01-01 00:00:00
abstract::Estimation of the concentration of C9, C-reactive protein (CRP) and alpha1-antitrypsin in forty sera from patients with Behcet's syndrome and recurrent oral ulcers showed significantly increased amounts of C9 and CRP in Behcet's syndrome. The concentration of C9 was also significantly raised in recurrent oral ulcerati...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1976-07-01 00:00:00
abstract::Anti-endothelial cell antibodies (AECA) have been frequently detected in systemic vasculitis, which affects blood vessels of various sizes. To understand the pathogenic roles of AECA in systemic vasculitis, we attempted to identify target antigens for AECA comprehensively by a proteomic approach. Proteins extracted fr...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2010.04218.x
更新日期:2010-09-01 00:00:00
abstract::The humoral immune response, especially IgG and IgA, is considered to be protective in the pathogenesis of periodontal disease, but the precise mechanisms are still unknown. Immunoglobulins arriving at the periodontal lesion are from both systemic and local tissue sources. In order to understand better the local immun...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.1999.00819.x
更新日期:1999-03-01 00:00:00
abstract::Anti-CD2 MoAbs have previously been shown to induce tolerance and to block B cell differentiation, T cell and monocyte activation. Since these immune functions are important in joint inflammation, we asked whether administration of the anti-CD2 MoAb OX34 has a beneficial effect on established rat adjuvant arthritis, a...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.1997.4881385.x
更新日期:1997-10-01 00:00:00
abstract::Connective tissue growth factor (CTGF) plays a role in the fibrotic process of systemic sclerosis (SSc). Because hypoxia is associated with fibrosis in several profibrogenic conditions, we investigated whether CTGF expression in SSc fibroblasts is regulated by hypoxia. Dermal fibroblasts from patients with SSc and hea...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.2006.03199.x
更新日期:2006-11-01 00:00:00
abstract::A method for the isolation of complement-fixing immune complexes from human serum and the separation of antigen from antibody is described. In order to isolate the complexes, we used soluble bovine conglutinin in a three-step procedure: (1) serum containing immune complexes is reacted with conglutinin in the presence ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1981-10-01 00:00:00
abstract::Monoclonal antibodies anti-Ly 1, anti-Ly 2 and GK1.5 were applied to determine phenotypes of T cells within granulomas formed as a result of infection of mice with the facultative intracellular bacterium Listeria monocytogenes. Early in granuloma formation, equal numbers of Ly 1+, Ly 2+ and L3T4+ cells were found, T c...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1985-06-01 00:00:00
abstract::Low concentrations of protease and trypsin reduced the electrophoretic mobility (EPM) of thymocytes; with higher concentrations it was normal or above. Differences in membrane structure of thymocytes, T and B cells was found as B cells showed no reduction while T cells gave intermediate values. Further the reduction w...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1975-10-01 00:00:00
abstract::Humans immunized intramuscularly with one dose of tetanus toxoid exhibited IgG, and in some cases IgA antibody, in their bile as well as serum. Both isotypes appeared in bile transiently with titres declining after about day 10 for both classes. These kinetics resembled those of the serum IgA response but were markedl...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1989-08-01 00:00:00
abstract::The recent report that anti-gp120 antibodies can be induced by allogeneic stimuli in experimental animals in the absence of HIV, has focused attention on the structural similarities between gp120 and MHC. Here we report that some HIV+ individuals develop antibodies which similarly react with the gp120 HIV sequence (aa...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1992.tb07923.x
更新日期:1992-11-01 00:00:00
abstract::The T cell response to different Leishmania donovani antigens was investigated using peripheral blood mononuclear cells (PBMC) from Kenyans cured of visceral leishmaniasis and non-exposed Danes. Crude promastigote and amastigote antigens both induced proliferation and interferon-gamma (IFN-gamma) production in PBMC fr...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/j.1365-2249.1994.tb06044.x
更新日期:1994-06-01 00:00:00
abstract::Binding of lymphocytes to human umbilical vein endothelial cells (EC) was quantitated by measuring adhesion of 51Cr labelled lymphocytes to endothelial cell monolayers and rosette formation between lymphocytes and EC in suspension. Mitogen stimulated human peripheral blood mononuclear cell culture supernatants and mix...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1985-12-01 00:00:00
abstract::A previously unrecognized autoantibody, detected by immunofluorescence, reacted with all human organs but gave negative results on tissues from rat, mouse, rabbit, guinea-pig, calf and chicken. From its predilection for mitochondria-rich cells (oncocytes) and its selective absorption with human but not animal mitochon...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1977-06-01 00:00:00
abstract::A method enabling direct enumeration of mouse T and B cells from cytocentrifuged cell smears is described. The acid alpha-naphthyl acetate esterase (ANAE) staining was used as marker for T cells. The distribution of the ANAE marker-carrying lymphocytes closely followed the percentual distribution of T cells in spleen ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1976-12-01 00:00:00
abstract::There is growing speculation about the meaning of reported imbalances in subpopulations of T lymphocytes in patients with chronic lymphocytic leukaemia (CLL). This study compared two techniques for producing T cell enriched subpopulations from both patients with CLL and normal individuals and the effects of these tech...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:
更新日期:1983-11-01 00:00:00
abstract::The proliferative response of preparations of whole PBMC populations from 20 healthy individuals and 28 multiple sclerosis (MS) patients to purified protein derivative (PPD) and myelin basic protein (MBP) was monitored in a kinetic assay over a period of up to 10 days. PPD produced a classical secondary response in bo...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1046/j.1365-2249.2001.01507.x
更新日期:2001-05-01 00:00:00
abstract::In this review the authors discuss the evidence for T helper type 17 (Th17) cells as pathogenic T cells in autoimmunity. Studies with cytokine-deficient mice or blocking of interleukin (IL)-17, IL-21 and IL-22 have resulted in a conflicting data set. Although in the experimental autoimmune encephalomyelitis model the ...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2249.2009.04039.x
更新日期:2010-02-01 00:00:00
abstract::It has always been known that anti-tissue transglutaminase 2 (anti-TG2) antibodies are produced in the small intestine. Their serum titres correlate with mucosal damage degree and decrease on a gluten-free diet (GFD). We aimed to correlate intestinal anti-TG2 antibodies levels with degree of mucosal damage and GFD dur...
journal_title:Clinical and experimental immunology
pub_type: 杂志文章
doi:10.1111/cei.12366
更新日期:2014-09-01 00:00:00