Abstract:
:Human immunodeficiency virus binds to CD4 T lymphocytes by interaction between its envelope glycoprotein gp120 and the CD4 molecule. The latter is non-covalently associated with a src-related tyrosine kinase, p56lck. CD4 cross-linking increases the activity of p56lck, leading to phosphorylation of several cellular substrates. We report here that gp160/120 increases both the autophosphorylation of p56lck and its enzymatic activity (reflected by phosphorylation of an exogenous substrate) in normal T cells and the HUT78 CD4+ T cell line. This effect was detectable 5 min after activation and persisted for 40 min in normal T cells. It did not require gp120 cross-linking and was associated with phosphorylation of tyrosine residue on several proteins, as shown by phosphotyrosine Western blot analysis. The pattern of proteins phosphorylated on tyrosine residues in response to gp120 activation was distinct from that induced by anti-CD4 antibodies. p56lck activation required its association with CD4, since p56lck activity was not modified in HUT78 T cell lines expressing a truncated or mutated form of CD4 unable to associate with p56lck. Peptides mimicking residues 418 to 434 and 449 to 464 of HIV-1 Bru gp120, regions known to participate in gp120 binding to CD4, also increased p56lck activity and triggered phosphorylation of similar substrates. Taken together, these results show that gp160/120 and derived peptides can transiently increase p56lck activity without the need for CD4 cross-linking. This activation led to a specific pattern of tyrosine phosphorylation on cellular proteins that may be of significance in the biological effects of the gp120/CD4 interaction, e.g. syncytium formation and inhibition of T cell activation.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Hivroz C,Mazerolles F,Soula M,Fagard R,Graton S,Meloche S,Sekaly RP,Fischer Adoi
10.1002/eji.1830230303subject
Has Abstractpub_date
1993-03-01 00:00:00pages
600-7issue
3eissn
0014-2980issn
1521-4141journal_volume
23pub_type
杂志文章abstract::To study the control of immunoglobulin kappa light chain gene rearrangement, we generated transgenic mice carrying a germ-line human kappa minilocus (HK) containing the J kappa-proximal V gene, V kappa IV, the V-J intergenic region, the five J kappa segments and the C kappa gene. This construct includes the intronic, ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:
更新日期:1997-07-01 00:00:00
abstract::Activation of invariant natural killer T (iNKT) cells by treatment with their α-galactosyl ceramide ligand provides therapeutic benefits in several immune inflammatory settings. Given the artificial nature of this stimulation, the natural regulatory functions of iNKT remain uncertain. Addressing this issue in a mouse ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201040647
更新日期:2011-02-01 00:00:00
abstract::The IgG2a(b) heavy chain allopeptide determinant gamma2a(b) 436-451 (Kabat numbering) presented by the major histocompatibility complex (MHC) class II molecule I-Ad is recognized by T cells which cross-react with a corneal self antigen and with the UL6 protein of the herpes simplex virus which induce autoimmune kerati...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/(SICI)1521-4141(199901)29:01<189::AID-IMMU
更新日期:1999-01-01 00:00:00
abstract::The human immunodeficiency virus type 1 (HIV-1) induces a strong cytotoxic T lymphocyte (CTL) response in humans following infection. HIV-specific CTL can be detected directly in the blood and lungs of infected patients, and can be expanded in vitro by stimulation with autologous HIV-infected lymphoblasts. Furthermore...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830190904
更新日期:1989-09-01 00:00:00
abstract::IL-12 is a potent inducer of IFN-gamma production and drives the development of Th1 cells. Human polarized Th2 cells do not express the signaling beta2-subunit of the IL-12R and, therefore, do not signal in response to IL-12. The question was raised as to what extent the loss of the IL-12Rbeta2 chain in Th2 cells has ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/1521-4141(200104)31:4<1055::aid-immu1055>3
更新日期:2001-04-01 00:00:00
abstract::CD4 T cells play a central role as helper cells in adaptive immunity. Presentation of exogenous antigens in MHC class II by professional antigen-presenting cells is a crucial step in induction of specific CD4 T cells in adaptive immune responses. For efficient induction of immunity against intracellular threats such a...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201747152
更新日期:2018-10-01 00:00:00
abstract::Group 2 innate lymphoid cells (ILC2s) are innate effectors playing an important role in the defense against helminthic infections and in the pathogenesis of allergic inflammation. Cytokines have been identified as the major stimuli driving ILC2 activation and expansion. Conversely, it is unclear whether costimulatory ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201545635
更新日期:2015-10-01 00:00:00
abstract::Soluble TRAIL (sTRAIL) can be produced by myeloid-derived cells to kill cancer cells. Whether this mechanism is used by T cells, and if so, how sTRAIL production is regulated, remains unclear. Our previous studies showed that ex vivo expanded human γδ T cells express TRAIL and NK receptor group 2 (R2), member D (NKG2D...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201243150
更新日期:2013-12-01 00:00:00
abstract::After incorporation of 14C-labeled amino acids and/or of [3H]fucose during in vitro culture of the Thy-1.1-bearing, Fc receptor-positive T lymphoma, L-5187-Y, attempts were made to purify the Fc binding structure(s). Following solubilization of a crude membrane pellet using sodium deoxycholate, the 110 000 x g superna...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830070916
更新日期:1977-09-01 00:00:00
abstract::The simultaneous detection of Ig and theta on the surface of mouse lymphocytes permits the detection of four cell types (Ig-theta-, Ig-theta+, Ig+theta-, and Ig+theta+) which also have distinct electrophoretic profiles. All types are present in variable proportions in all lymphoid organs studied. Results obtained in c...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830050211
更新日期:1975-02-01 00:00:00
abstract::The interaction between activated T cells and eosinophils has been proposed to play an important role in the pathogenesis of allergic diseases. T cell-derived cytokines such as interleukin-5 and granulocyte/macrophage colony-stimulating factor inhibit eosinophil apoptosis and may therefore contribute to the developmen...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830260817
更新日期:1996-08-01 00:00:00
abstract::Peptides presented by MHC class I molecules are mostly derived from proteins synthesized by the antigen-presenting cell itself, while peptides presented by MHC class II molecules are predominantly from materials acquired by endocytosis. External antigens can also be presented by MHC class I molecules in a process refe...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201445156
更新日期:2015-02-01 00:00:00
abstract::The study of the immunology of schistosomiasis has allowed a clear understanding of the basic mechanisms of resistance, emphasizing the important role played by cellular and humoral factors. Whereas the production of polyclonal or monoclonal antibodies and the precise inventory of immune effector mechanisms in the rat...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830151205
更新日期:1985-12-01 00:00:00
abstract::The beta7 integrins alpha4beta7 and alphaEbeta7 play key roles in forming the gut-associated lymphoid tissue, and contribute to chronic inflammation. The alpha4beta7 integrin-mediated adhesion of activated lymphocytes is largely due to a transient increase in avidity from ligand-induced clustering of alpha4beta7 at th...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200535324
更新日期:2006-08-01 00:00:00
abstract::Alpha-galactosylceramide (alpha-GalCer) activates invariant (i)NKT cells, which in turn stimulate immunocompetent cells. Although activation of iNKT cells appears critical for regulation of immune responses, it remains elusive whether protection against intracellular bacteria can be induced by alpha-GalCer. Here, we s...
journal_title:European journal of immunology
pub_type: 杂志文章,收录出版
doi:10.1002/eji.200939594
更新日期:2010-05-01 00:00:00
abstract::The thymic architecture is normally compartmentalized into a central medulla surrounded by a peripheral cortical region. We investigated how compartmentalization of the thymic stroma is regulated using T cell receptor (TCR)-transgenic mouse models. Our studies show that the signals generated by TCR/peptide/major histo...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830270121
更新日期:1997-01-01 00:00:00
abstract::A number of applications of antibodies in diagnosis and therapy require multivalent reagents either because of the polymeric nature of the antigens or because biological activity depends on an effect on the formation of homodimeric species. Here, we report a procedure for mass screening of phage-derived monomeric anti...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830270307
更新日期:1997-03-01 00:00:00
abstract::B cells isolated from germinal centers (GC) of immune mice 2-5 days after antigen (Ag) challenge migrate in response to chemotactic signals, whereas GC B cells isolated at other times and resting B cells do not. Since B cells are in direct contact with follicular dendritic cells (FDC) in GC we reasoned that FDC might ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830250437
更新日期:1995-04-01 00:00:00
abstract::Exosomes from APC are nano-vesicles that can induce antigen-specific T cell responses and are presently explored as therapeutic tools in different clinical settings. Investigations of the capacity of exosomes to stimulate T cells in vitro have mostly been performed on T cell hybridomas, clones or lines. Whether exosom...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200535615
更新日期:2006-07-01 00:00:00
abstract::The induction of B cell tolerance to 2,4-dinitrophenyl conjugates of polysaccharide antigens (levan or dextran) was studied in mice primed with keyhole limpet hemocyanin (KLH) or 2,4,6-trinitrophenylated KLH. The relationship of the epitope density of the tolerogen with avidity of B cell receptors (as judged indirectl...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830060910
更新日期:1976-09-01 00:00:00
abstract::BALB/c and anti-IL-12-treated C3H mice infected with Leishmania major develop a Th2 cell response. However, in contrast to BALB/c mice, C3H mice treated transiently with an anti-IL-12 monoclonal antibody switch from a Th2 to a Th1 response and resolve their lesions once treatment is terminated. We report here that the...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/1521-4141(200007)30:7<2007::AID-IMMU2007>3
更新日期:2000-07-01 00:00:00
abstract::Immunodominant T cell epitopes from the autoantigen human cartilage glycoprotein 39 have previously been mapped in the context of HLA-DR*0401 and *0402, using mice expressing HLA-DR4 transgenes. We measured the dissociation rates of these epitopes from soluble recombinant DR*0401 and DR*0402 to assess the relationship...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/1521-4141(200203)32:3<662::AID-IMMU662>3.0
更新日期:2002-03-01 00:00:00
abstract::Mononuclear phagocytes and lymphocytes can both synthesize cytotoxins which kill certain tumor cell lines and recent evidence suggests that these cytotoxins may be identical. In this study, human monocyte cytotoxin and lymphoblastoid lymphotoxin have been critically compared in terms of specificity, physicochemical ch...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830150321
更新日期:1985-03-01 00:00:00
abstract::When cytotoxic titrations were made of rabbit anti-mouse brain and anti-Thy-1.2 sera against mouse lymphoid cells in the presence of sodium barbital or xylocaine, it was observed that a proportion of T cells were much more sensitive (50 x) than the remainder. This effect could be detected with ethidium or fluorescein ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830050408
更新日期:1975-04-01 00:00:00
abstract::The germ-line V gene segments encoding the subgroups A and G of the BALB/c V kappa 21 family were cloned and assigned to the previously described 30-kb cluster of the V kappa 21 family. Sequence comparison revealed close homology between the two gene segments at the DNA and the predicted amino acid sequence level, ind...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830191031
更新日期:1989-10-01 00:00:00
abstract::Cytotoxic T lymphocytes (CTL) and natural killer (NK) cells elaborate a cytolytic protein named perforin or cytolysin. It was widely held that, in vivo, high quantities of perforin are not present in resting lymphocytes and are usually produced only by activated lymphocytes found under pathological conditions. Until n...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830230907
更新日期:1993-09-01 00:00:00
abstract::The surface expression of given HLA class I alleles protects target cells from lysis mediated by natural killer (NK) clones specific for these (or related) alleles. We could define two groups of NK clones specifically recognizing either Cw4 and related C alleles ("group 1") or Cw3 and related C alleles ("group 2"), re...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830240434
更新日期:1994-04-01 00:00:00
abstract::Wiskott-Aldrich syndrome (WAS) is an X-linked disorder characterized by congenital thrombocytopenia and progressive deterioration of the immune function. Dendritic cells (DC) are key effectors in the induction of specific immunity and are highly specialized in antigen uptake and subsequent migration to draining lymph ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/1521-4141(200112)31:12<3413::aid-immu3413>
更新日期:2001-12-01 00:00:00
abstract::Injection of M-1 (Cmu), G-1 (Cgamma) heterozygous chickens on the day of hatch with anti-IgM-1 antiserum induced allotype suppression from which chickens recovered over a period of approximately 4 months. The suppression of the serum IgM-1 levels was matched by a decrease in the number of splenic and peripheral blood ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830110407
更新日期:1981-04-01 00:00:00
abstract::Although the role of interleukin 2 (IL 2) in mature T lymphocyte function is well documented, its effect on hematopoietic progenitor cells is less well characterized. Here we have used recombinant retroviruses to transduce and express a cDNA clone encoding the p55 component of the human IL 2 receptor (h-p55), in a mur...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830200317
更新日期:1990-03-01 00:00:00