Abstract:
:Cross-linking of BCR rapidly induces protection of B cells from Fas-mediated apoptosis, which has been assumed one of the important survival mechanisms of B cells during antigen stimulation. In the mouse B cell line A20, which is sensitive to Fas-mediated apoptosis, stimulation of BCR inhibited apoptosis induced via Fas upstream of caspase-8 activation with an associated rapid increase in the expression of both short and long forms of cellular caspase-8/FLICE-inhibitory protein (c-FLIP). The c-FLIP competitively inhibited the recruitment of caspase-8 to the death-inducing signaling complex (DISC), which took as long as 3h to form after the stimulation of Fas in A20 cells. Knockdown of c-FLIP by a short hairpin RNA-expressing method rendered BCR-stimulated A20 cells sensitive to Fas-mediated apoptosis. The BCR-induced rapid expression of c-FLIP was not affected by inactivation of NF-kappaB, but was inhibited by either treatment with a PI3K inhibitor, LY294002, or expression of a dominant negative PI3K p85 subunit, both of which suppressed phosphorylation of Akt and sensitized BCR-stimulated A20 cells to Fas-mediated apoptosis. Overexpression of constitutively active Akt was shown not only to up-regulate c-FLIP expression but also to render A20 cells resistant to Fas-mediated apoptosis. Moreover, treatment with LY294002 also suppressed BCR-induced up-regulation of c-FLIP expression in spleen B cells. Taken together, BCR-stimulation was shown to rapidly trigger a survival signal against simultaneously or ongoingly stimulated Fas-mediated apoptosis by promoting a PI3K/Akt signaling pathway-mediated up-regulation of c-FLIP expression.
journal_name
Immunol Lettjournal_title
Immunology lettersauthors
Moriyama H,Yonehara Sdoi
10.1016/j.imlet.2006.12.009subject
Has Abstractpub_date
2007-03-15 00:00:00pages
36-46issue
1eissn
0165-2478issn
1879-0542pii
S0165-2478(07)00005-3journal_volume
109pub_type
杂志文章abstract::The cellular source of murine LAIF detected by an indirect leukocyte adherence inhibition (LAI) assay using capillary tubes was investigated using non-inducing peritoneal cells (PC) from normal and spindle-cell sarcoma-bearing A/J mice. Cell populations containing greater than 95% T-cells, B-cells or macrophages were ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(81)90005-5
更新日期:1981-11-01 00:00:00
abstract::Peanut agglutinin (PNA), a D-galactose specific lectin, agglutinated 10-18% of lymphocytes isolated from tonsils of 3- to 6-yr-old children. PNA+ cells were found to be mainly B lymphocytes showing a 9.6 times higher specific activity of DNA polymerase alpha compared to the PNA- cells. The specific activity of deoxycy...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(87)90040-x
更新日期:1987-06-01 00:00:00
abstract::Interleukin-18 (IL-18) plays a central role in the immune response by acting on Th1 cell differentiation, cell-mediated cytotoxicity and inflammation. The role of IL-18 in cancers and inflammatory diseases is discussed in the light of our investigations on IL-18 synthesis in normal colonic mucosa, colonic cancer and C...
journal_title:Immunology letters
pub_type: 杂志文章,评审
doi:10.1016/s0165-2478(00)00285-6
更新日期:2000-12-01 00:00:00
abstract::Humans frequently produce serum IgM autoantibodies reactive with T-cell receptor beta chains at a determinant defined by peptides corresponding to the first complementarity determining region. It is likely that this determinant serves as a public idiotype involved in immunoregulation. Following screening of culture su...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(93)90010-y
更新日期:1993-11-01 00:00:00
abstract::Administration of human recombinant interleukin-2 (RIL-2) into congenitally athymic (nu/nu) mice carrying subcutaneous transplants of HeLa, HU 609T and T24B human carcinoma cells partially inhibited growth of the human tumor xenografts. In vitro activation of nu/nu spleen cells with human RIL-2 resulted in generation ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(87)90013-7
更新日期:1987-04-01 00:00:00
abstract::Heat-sensitive serum masking cofactor(s) of antiphospholipid antibody (aPL) in normal human sera (NHS) are specifically inactivated at 56 degrees C. The degree of binding in ELISA by unmasked aPL in NHS was equivalent to that in non-heated, aPL-reactive autoimmune SLE sera. Previously "negative" SLE sera also reacted ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(90)90189-w
更新日期:1990-01-01 00:00:00
abstract::The previously called "hemoglobinase" Sm32 molecule of the adult worm of Schistosoma mansoni was chemically synthesized in 22 polymeric peptides based on the t-boc strategy. Their immunogenicity was evaluated in rabbits to which a mixture of five to six peptides of 20 amino acids long were given in three doses with Fr...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(03)00086-5
更新日期:2003-09-08 00:00:00
abstract::Administration of opioids that bind to the classical mu opioid receptor has been shown to lead to unintended alterations in immune function. Traditionally, altered immune function has been investigated with circulating immune cells. Effects of mu agonists on intestinal epithelial immune function have not been describe...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(02)00198-0
更新日期:2002-12-03 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2013.05.005
更新日期:2013-05-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2016.08.010
更新日期:2016-10-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章,评审
doi:10.1016/j.imlet.2013.07.004
更新日期:2013-06-01 00:00:00
abstract::Immunoselection screening methods were developed for the detection of the free heavy chain determinants of biological fluids. The optimal sensitivity range of the electrosyneresis and electroimmunoassay type methods lies between 400 ng and 2 micrograms/ml and between 3 micrograms and 1 mg/ml for immunoglobulins. The s...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(84)90080-4
更新日期:1984-01-01 00:00:00
abstract::Aging is associated to dysfunctional changes in the immune system, a process termed immunosenescence. Elderly individuals usually present chronic low level inflammation, likely as the consequence of continued exposure to antigens combined with poor immune function, increases in production of pro-inflammatory cytokines...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2014.06.015
更新日期:2014-11-01 00:00:00
abstract::Much evidence indicates that atherosclerotic lesions are largely of an inflammatory nature. Activated macrophages and macrophage-derived foam cells laden with cholesterol esters are a major constituent of these lesions and can influence lesion formation via several potential mechanisms. One such mechanism is Fcgamma r...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(01)00217-6
更新日期:2001-07-02 00:00:00
abstract::Experimental systemic lupus erythematosus (SLE), similar to that observed after immunization with the human anti-DNA mAb 16/6 Id+, could be induced in mice by injection of 16/6 Id specific T-cell lines. The above T-cell lines were exclusively CD4+ CD8- and the majority of cells expressed the Vbeta8 T-cell receptor (TC...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(97)00156-9
更新日期:1998-05-01 00:00:00
abstract::Recently, a newly identified human HERV-K18 like endogenous retrovirus (IDDMK(1,2)22) has been associated to the etiology of type I diabetes (IDDM). Although the exact mechanism remains unclear, it was postulated that the 3' end ORF product of the env gene of IDDMK(1,2)22 would trigger a V beta 7-specific human T cell...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(01)00340-6
更新日期:2002-04-01 00:00:00
abstract::Leukaemic blood lymphocytes from patients with B prolymphocytic leukaemia express the common acute lymphoblastic leukaemia antigen (CALLA). The in vitro incubation of prolymphocytes with leucocyte conditioned medium produced the acquisition of plasma cell morphology, of intracytoplasmic immunoglobulins and the simulta...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(85)90005-7
更新日期:1985-01-01 00:00:00
abstract::It has been shown that engraftment of human peripheral blood lymphocytes (PBL) from Epstein-Barr virus (EBV) seropositive donors in C.B-17/SCID mice is associated with a high incidence of human B cell tumors. More recently, we described a new approach enabling engraftment of human PBL in normal strains of mice or rats...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(96)02497-2
更新日期:1996-03-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2008.03.001
更新日期:2008-06-15 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(98)00014-5
更新日期:1998-04-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2009.06.002
更新日期:2009-08-15 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(87)90093-9
更新日期:1987-01-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/s0165-2478(01)00194-8
更新日期:2001-05-01 00:00:00
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journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(86)90048-9
更新日期:1986-09-01 00:00:00
abstract::To study the mechanism(s) responsible for the appearance of Epstein-Barr virus (EBV)-induced anti-histone autoantibodies, peripheral blood B lymphocytes from healthy donors were infected with EBV and the resulting lymphoblastoid cell lines were tested for secretion of antibodies reacting with histones. It was found th...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(94)90169-4
更新日期:1994-03-01 00:00:00
abstract::Recombinant and pure "natural" IL-1 and IL-2 were compared with the muramyl dipeptide (MDP) component of Freund's adjuvant for their capacity to enhance the humoral immune response against foot-and-mouth disease (FMD) virus antigen. Using a dose of this antigen which alone did not give a detectable immune response, an...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(92)90008-c
更新日期:1992-01-01 00:00:00
abstract:BACKGROUND:Omalizumab therapy was found to be safe and effective as an add-on therapy for patients with poorly controlled severe asthma. Although several studies over the last decade have demonstrated its efficacy in other Immunoglobulin E related diseases, its use in such conditions is off-label. OBJECTIVE:This study...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2020.08.002
更新日期:2020-11-01 00:00:00
abstract::In a previous study we have shown that, in response to electrical stimulation, there is a substantial release of noradrenaline (NA) from the sympathetic nerve terminals of the rat thymus which is of axonal, vesicular origin. In the present study neurochemical evidence was obtained that the release of NA is subject to ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(95)00085-j
更新日期:1995-07-01 00:00:00
abstract::Oral vaccine responsiveness is often lower in children from less developed countries. Childhood malnutrition may be associated with poor immune response to oral vaccines. The present study was designed to investigate whether protein energy malnutrition (PEM) impairs B cell immunity and ultimately reduces oral vaccine ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/j.imlet.2017.08.025
更新日期:2017-10-01 00:00:00
abstract::Work done in our laboratories, using a murine model, indicates that suppression of host immune responses might be due to secretion of soluble factors by tumor cells. The H238 cells (BALB/c embryonic fibroblasts transformed by UV-inactivated herpes simplex virus Type 2) exhibit progressive tumor growth with subsequent ...
journal_title:Immunology letters
pub_type: 杂志文章
doi:10.1016/0165-2478(91)90087-q
更新日期:1991-09-01 00:00:00