Abstract:
:Human peripheral blood natural killer (NK) cells (CD56+, CD16+, CD3 epsilon- lymphocytes) express CD69 after their stimulation by interleukin-2 (IL-2) or interferon-alpha (IFN-alpha). This activation antigen represents a triggering surface molecule in NK cell clones as its stimulation triggers the cytolytic machinery of these cells. However, the mechanisms regulating the expression of CD69 in NK cells are unknown despite the functional relevance of CD69 in NK cell activation. Thus, we have analyzed the role of protein kinase C (PKC) and protein tyrosine kinases (PTK) in the expression of CD69 on purified NK cells activated by IL-2, IFN-alpha, anti Fc gamma RIII (CD16) monoclonal antibodies or by K562 target cells. We found that CD69 is induced on NK cells not only by IL-2 and IFN-alpha but also by activation of the CD16 pathway, the interaction with NK target cells and the direct activation of PKC by phorbol 12-myristate 13-acetate (PMA), indicating that CD69 induction is associated to different NK activation pathways. The treatment with the PKC inhibitor staurosporine abolished the induction of CD69 induced by PMA or K562. However, it did not significantly affect CD69 induction by IL-2, IFN-alpha or CD16 cross-linking. This demonstrates that whereas PKC can play a central role in the regulation of CD69 expression in some instances (response to K562 cells or PMA), it does not participate in others (response to IL-2, IFN-alpha or anti CD16 monoclonal antibodies). On the other hand genistein, a competitive inhibitor of PTK enzymes, blocked the expression of CD69 induced by activation of NK cells via IL-2 or IFN-alpha receptors, CD16 and K562 receptor(s), indicating that stimulation of PTK is a common step in the signal transduction events leading to the induction of CD69 antigens after the activation of NK cells via these receptors.
journal_name
Eur J Immunoljournal_title
European journal of immunologyauthors
Borrego F,Peña J,Solana Rdoi
10.1002/eji.1830230509subject
Has Abstractpub_date
1993-05-01 00:00:00pages
1039-43issue
5eissn
0014-2980issn
1521-4141journal_volume
23pub_type
杂志文章abstract::As shown recently, CD3+/TcR+ functional T lymphocytes can be derived in culture from embryonic liver cell precursors at a gestational age (6-8 weeks) preceding the colonization of the epithelial thymus. In this report, we analyzed the V beta repertoire of T lymphocytes derived from embryonic liver by applying a quanti...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830240949
更新日期:1994-09-01 00:00:00
abstract::CD4+CD25(hi)CD127(lo/-) regulatory T cells (Treg) have been implicated in the resolution of asthma-associated inflammation while the opposite role of CD4+ invariant NKT (iNKT) cells has been the subject of recent investigations. Studies here focused on mechanisms of interaction between CD4+ iNKT cells and Treg to furt...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200738082
更新日期:2008-07-01 00:00:00
abstract::CD4+ helper T lymphocytes and CD8+ killer T lymphocytes are both generated in the thymus from common precursor cells expressing CD4 and CD8. The development of immature CD4 CD8+ thymocytes into mature 'single-positive' T cells requires T cell antigen-receptor (TCR)-mediated positive selection signals. Although it is k...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830271231
更新日期:1997-12-01 00:00:00
abstract::A monoclonal antibody (12-15) reactive with the mouse CD2 was used to study the expression of the antigen in different lymphoid cell subsets. By two-color immunofluorescence using B or T cell-specific reagents and cell sorting in combination with biochemical analysis we provide evidence that the CD2 antigen is present...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830190826
更新日期:1989-08-01 00:00:00
abstract::Reactive oxygen species (ROS) are implicated in the modulation of diverse processes including immune responses. To evaluate the effects of metabolic ROS produced by mitochondria on B-cell function and development, we created transgenic (Tg) mice expressing a phosphorylation-defective mutant of succinate dehydrogenase ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201646342
更新日期:2017-02-01 00:00:00
abstract::Constitutive expression of CD25, the IL-2 receptor alpha-chain, defines a distinct population of CD4+ T cells (Treg) with suppressive activity in vitro and in vivo. IL-2 has been implicated in the generation and maintenance of Treg, however, a functional contribution of the IL-2 receptor during suppression is thus far...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200425274
更新日期:2004-09-01 00:00:00
abstract::Fourteen noncytotoxic human helper T cell clones were examined for autocrine proliferative responses and cytotoxicity to tumor cells after stimulation with 12-O-tetradecanoylphorbol 13-acetate (TPA) and ionomycin (Io). Although all clones responded to alloantigen, they could be divided into two groups based on their p...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830180729
更新日期:1988-07-01 00:00:00
abstract::Disseminated infections by the opportunistic yeast Cryptococcus neoformans are characterized by accumulation in tissues of glucuronoxylomannan (GXM), the major component of the capsular polysaccharide. We investigated binding, uptake, and disposal of GXM by peripheral blood neutrophils and monocytes, and the effect of...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200323388
更新日期:2003-04-01 00:00:00
abstract::In the past 15 years, it became clear that the symbiotic microbiota has an important impact on the development and regulation of the immune system. Consequently, it is incorrect to interpret a phenotype solely as a direct result of the genotype, without considering the impact of the microbiota. In fact, ignorance of t...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.202048615
更新日期:2020-06-01 00:00:00
abstract::An experimental model of adenosine deaminase deficiency was established on the human T cell line Jurkat by using 2'-deoxycoformycin, a strong specific inhibitor of the enzyme. When deoxyadenosine was added to the inhibited cells, the nucleotide profile was modified reproducing that found in lymphocytes from adenosine ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830200322
更新日期:1990-03-01 00:00:00
abstract::Spontaneous cytolytic activity of shark peripheral blood leukocytes is observed only during periods of decreased environmental temperature (less than 23 degrees C). The effector cell is adherent to glass and is phagocytic. Leukocytes tested during warmer periods (26-31 degrees C) exhibit no spontaneous activity; howev...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830130208
更新日期:1983-02-01 00:00:00
abstract::Antibodies against bacterial capsular polysaccharides play a critical protective role. Responses to these antigens can occur without the help or control of T cells and are associated with marginal zone (MZ) B cells. Capsular antigens are diverse and some cross-react with self-carbohydrate epitopes. This diversity may ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/immu.200310003
更新日期:2003-02-01 00:00:00
abstract::The poxvirus A39R protein is a member of the semaphorin family that binds to Plexin C1, a molecule expressed on neutrophils and dendritic cells (DC). We previously showed that binding of A39R to Plexin C1 induces local rearrangement of the actin cytoskeleton and inhibits integrin-mediated adhesion, leading to cell ret...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200425669
更新日期:2005-02-01 00:00:00
abstract::MHC class II molecules present peptides, derived largely from exogenous antigens, to CD4+ T cells. Complex-generation occurs mainly in the specialized late endosomal MHC class II-rich compartment (MIIC) vesicles of antigen-presenting cells (APC). Dendritic cells (DC) have been reported to store intact antigen in MIIC ...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/1521-4141(200211)32:11<3246::AID-IMMU3246>
更新日期:2002-11-01 00:00:00
abstract::The cloned human gamma 1 heavy chain gene (HIG1) was scarcely expressed in the stable transformants of a mouse fibroblast line, L cell or a T cell line, EL4, and no gamma 1 heavy chain was produced in these cells. Upon treatment with cycloheximide or other kinds of protein synthesis inhibitors, the transcription of HI...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830170906
更新日期:1987-09-01 00:00:00
abstract::In the homeostasis of the immune system regulatory cells play a major role. Removal of one group of regulatory cells, the CD25(+)CD4(+) T cells, leads to autoimmune manifestations in experimental animal models, and reintroduction of this population prevents disease. This study addresses the role of such regulatory T c...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/immu.200390024
更新日期:2003-01-01 00:00:00
abstract::Human plasmacytoid dendritic cells (PDC) are believed to link innate and adaptive immunity by producing type I interferon (IFN-I) and triggering adaptive T cell-mediated immunity. However, it remains elusive to which degree both PDC functions are linked. Here we show that CMV antigen targeted to PDC using a CD303 (blo...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200737552
更新日期:2008-07-01 00:00:00
abstract::The responses of a single cloned T cell line to three different class II major histocompatibility complex (MHC) ligands have been compared for avidity, determined by inhibition with anti-T cell receptor Fab fragments directed at two different receptor epitopes, and for ease of inhibition with anti-CD4 antibody. It has...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830190114
更新日期:1989-01-01 00:00:00
abstract::During mammalian pregnancy, one or more semiallogeneic fetuses gestate in direct contact with the maternal circulation and uterine tissue. However, a damaging maternal immune response is not normally provoked. We studied two possible mechanisms for this maternal-fetal tolerance, alone and in combination. First, we dir...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/(SICI)1521-4141(199811)28:11<3479::AID-IMM
更新日期:1998-11-01 00:00:00
abstract::Empty major histocompatibility complex (MHC) class I molecules present on the surface of RMA-S (26 degrees C) cells were loaded with the iodinated peptides APGNYPAL, FAPGNYPAL (SEV-9) and RGYVYQGL (VSV-8), respectively. The thermostability of these peptide-loaded MHC class I molecules was assessed using temperature gr...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830230847
更新日期:1993-08-01 00:00:00
abstract::The murine intestinal epithelium contains a heterogeneous population of intraepithelial leukocytes (IEL) most of which are granulated, Thy-1-CD5-CD8+. In order to assess the lineage relationship of this subgroup of IEL to peripheral T cells, we examined IEL in mice with the severe combined immunodeficiency (scid/scid)...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830200327
更新日期:1990-03-01 00:00:00
abstract::The development and the differentiation of CD8(+) T cells are dependent on IL-15. Here, we have studied the source and mechanism of how IL-15 modulates CD8(+) T cell-mediated Th1 immune responses by employing two delayed-type hypersensitivity (DTH) models. IL-15-deficient (IL-15(-/-)) mice or mice treated with soluble...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200324545
更新日期:2003-12-01 00:00:00
abstract::The covalent binding reaction of the third component of complement (C3) with rabbit IgG immune aggregates has been studied by enzymic digestion of C3b-IgG adducts. In these adducts C3b was radioactively labeled in the free thiol group generated during activation of the internal thioester of C3. Trypsin digestion of 14...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830240316
更新日期:1994-03-01 00:00:00
abstract::Follicular helper T (Tfh) cells provide crucial help to germinal center B (GCB) cells for proper antibody production, and a specialized subset of regulatory T cells, follicular regulatory T (Tfr) cells, modulate this process. However, Tfr-cell function in the GC is not well understood. Here, we define Tfr cells as a C...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.201546094
更新日期:2016-05-01 00:00:00
abstract::Acute and chronic airway inflammations caused by environmental agents including endotoxin represent an increasing health problem. Local TNF production may contribute to lung dysfunction and inflammation, although pulmonary neutrophil recruitment occurs in the absence of TNF. First, we demonstrate that membrane-bound T...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200636371
更新日期:2007-03-01 00:00:00
abstract::Although potentially autoreactive T cells are present even in healthy subjects, most individuals do not develop autoimmune disease. It has been well demonstrated that CD4+ CD25+ regulatory T cells play a significant role in controlling the expansion of autoreactive T cells in the periphery. However, some healthy indiv...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200636383
更新日期:2007-01-01 00:00:00
abstract::Restriction fragment length polymorphism has been compared between the Igh loci of C57BL/6 and MOLF/EI (Mus musculus molossinus) mice utilizing probes which detect the C gamma 2b gene and genes from nine VH-gene families. Distinct restriction site patterns were found for the CH genes and for VH families PC7183, Q52 an...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830170920
更新日期:1987-09-01 00:00:00
abstract::Activation of naive T cells is tightly controlled and depends on cognate interactions with professional antigen-presenting cells. We analyzed dependency on secondary lymphoid tissues for the activation of naive and memory CD4(+) and CD8(+) T cells following primary and secondary Listeria monocytogenes infection, respe...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.200737142
更新日期:2008-01-01 00:00:00
abstract::Previously we implicated c-Jun N-terminal kinase (JNK) as an element that is involved in signal integration during co-stimulation of T lymphocytes. This pathway has now been traced to an upper level, comprising MAPKK SEK1/MKK4/JNKK1 which, similarly to JNK, must receive input both from the TCR and CD28. A large portio...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/(SICI)1521-4141(199808)28:08<2320::AID-IMM
更新日期:1998-08-01 00:00:00
abstract::A large panel of T cell clones (TCC) specific for the recombinant form of Poa pratensis allergen (rKBG7.2 or Poa p9) were established from the peripheral blood of grass pollen-sensitive donor in the absence or presence of recombinant interferon-alpha (IFN-alpha) in bulk culture and their pattern of cytokine secretion,...
journal_title:European journal of immunology
pub_type: 杂志文章
doi:10.1002/eji.1830260328
更新日期:1996-03-01 00:00:00