Abstract:
:The induction of ornithine decarboxylase (ODC) activity in lymphocytes is associated with activation and the initiation of cellular proliferation. ODC is also an essential component in tumor promotion. Phorbol myristic acetate (PMA) is a mitogen for lymphocytes, but can also promote tumor formation. Tumor promotion is linked to the generation of free radicals induced by PMA. Modulation of intracellular glutathione is associated lymphocyte activation and in protection of cells from damage due to oxygen radicals. We examined the interaction between ODC activity and intracellular glutathione concentrations in EL4 murine lymphoblastoid cells. The intracellular glutathione concentration could be augmented in EL4 cells when cultured with the cysteine delivery agents 2-oxothiazolidine 4-carboxylate (OTC) and 2-mercaptoethanol (2-ME) and suppressed with the gamma-glutamylcysteine synthetase inhibitor buthionine sulfoximine (BSO). OTC and 2-ME suppressed ODC activity in fresh serum and PMA-activated EL4 cells. BSO had no effect on ODC activity of EL4 cells cultured in the presence of PMA. While both OTC and 2-ME augmented the total intracellular glutathione concentration, PMA enhanced only the level of oxidized glutathione. To determine if the mechanism by which PMA or fresh serum altered intracellular glutathione and ODC activity was through the generation of oxygen radicals, EL4 cells were cultured with free radical scavengers. The nonpermeant electron acceptor potassium ferricyanide, and the H2O2 scavenger catalase, lowered ODC activity in both serum-stimulated and PMA-activated EL4 cells. Similarly, incubation of EL4 cells with either potassium ferricyanide or catalase elevated intracellular glutathione concentrations. These data suggest that (a) modulation of intracellular glutathione in the EL4 lymphoblastoid cell line alters ODC activity induced by fresh serum and by the mitogen PMA; (b) activation of EL4 cells by PMA alone alters intracellular glutathione metabolism, which may be associated with its role as a mitogen in lymphocyte activation; and (c) the generation of free radicals in EL4 cells may play a positive role in cellular activation.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Fidelus RKdoi
10.1016/0008-8749(88)90015-9subject
Has Abstractpub_date
1988-04-15 00:00:00pages
175-82issue
1eissn
0008-8749issn
1090-2163pii
0008-8749(88)90015-9journal_volume
113pub_type
杂志文章abstract::Spontaneous rosette formation in humans is restricted to a subpopulation of the circulating T cells. We have previously shown that the interaction between lymphocytes and autologous red blood cells (auto-RBC) is not mediated by a self-recognition mechanism, since allogeneic (allo-) RBC bind to T cells through the same...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(85)90345-4
更新日期:1985-11-01 00:00:00
abstract::The Interferon-inducible gene IFI16, a member of the HIN200 family, is activated by oxidative stress and cell density, in addition to Interferons, and it is implicated in the regulation of endothelial cell proliferation and vessel formation in vitro. We have previously shown that IFI16 is required for proinflammatory ...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2009.02.007
更新日期:2009-01-01 00:00:00
abstract::In an attempt to better relate specific membrane characteristics of human adult and cord blood lymphocytes to specific functional activities, the phenotypic differences that exist in these two populations have been examined. Cord blood cells have considerably more spontaneous suppressor cell activity than adult cells....
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(83)90214-9
更新日期:1983-10-01 00:00:00
abstract::Modification of cytokine production by gender hormones has been postulated to affect disease susceptibility and outcome. Here we investigate the effect of gender and the menstrual cycle on production of cytokines. Mononuclear cells were isolated every week for 10 consecutive weeks from healthy pre-menopausal women and...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2008.04.013
更新日期:2008-02-01 00:00:00
abstract::Mice infected with murine acquired immunodeficiency syndrome (MAIDS) virus developed lymphoadenopathy and profound immunodeficiency. Concomitantly the expression of endogenous mammary tumor virus (MTV) mRNA increased significantly, especially for the 1.7-kb 3' open reading frame (ORF) mRNA encoding MTV superantigen. B...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1998.1326
更新日期:1998-08-01 00:00:00
abstract::The relay hypothesis [R. Nayak, S. Mitra-Kaushik, M.S. Shaila, Perpetuation of immunological memory: a relay hypothesis, Immunology 102 (2001) 387-395] was earlier proposed to explain perpetuation of immunological memory without requiring long lived memory cells or persisting antigen. This hypothesis envisaged cycles ...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2007.05.001
更新日期:2007-03-01 00:00:00
abstract::In this study we investigated whether T cells expressing high or low levels of CD62L were differentially susceptible to the T cell chemokine lymphotactin. We found that lymphotactin induced preferential migration of antigen-specific (CD62L(lo)) T cells over the nonspecific (CD62L(hi)) T cells in vitro and in vivo. The...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.2001.1790
更新日期:2001-05-01 00:00:00
abstract::Medicinal plants are considered immunomodulatory as they display various biological activities. There is no report addressing the anti-inflammatory effects of Daphne gnidium. In this study, we investigated the effects of D. gnidium ethyl acetate (EA) leaf extract on mice immune cell function in vitro. Production of pr...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2010.12.002
更新日期:2011-01-01 00:00:00
abstract::Soluble suppressor factors in the sera of cancer patients inhibit lectin-stimulated lymphocyte proliferation. These factors, derived from human material, preclude easy corroboration by other investigators. To gain a general understanding of soluble suppressor factors and to avoid the necessary restrictions of human ex...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(84)90389-7
更新日期:1984-07-01 00:00:00
abstract::This study examines cytotoxic mechanisms used by channel catfish peripheral blood-derived effector cells. Transmission electron microscopy (TEM), coupled with [(3)H]thymidine DNA fragmentation (JAM) and terminal deoxynucleotidyl nick-end labeling (TUNEL) assays, provided the first evidence that catfish peripheral bloo...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1999.1523
更新日期:1999-08-01 00:00:00
abstract::The aim of the study was to investigate the interaction between manLAM and DC-SIGN influencing DCs maturation and downstream immune response using small interfering RNA-expressing lentiviral vectors to specifically knockdown DC-SIGN. Our data indicated that DC-SIGN knockdown alone in DCs did not affect the maturation ...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2011.09.001
更新日期:2011-01-01 00:00:00
abstract::The cellular requirements for stimulating primed alloreactive T cells have been investigated. In vitro-primed secondary alloreactive cells, long-term lines, and Ly 1+2- noncytolytic clones which reacted with allo-H-2K, D, or Mls (M locus) antigens were tested. The data indicated that a specialized antigen-presenting c...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(85)90032-2
更新日期:1985-03-01 00:00:00
abstract::One of the auto-antigens aberrantly targeted in Multiple sclerosis is myelin basic protein (MBP). In this study, chronic progressive multiple sclerosis (CPMS) patients receiving the experimental drug MBP8298, on a compassionate care trial, were examined before and after high dose peptide treatment for their circulatin...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2012.11.004
更新日期:2012-11-01 00:00:00
abstract::A variant nonkiller (K-) T-cell clone derived from the MHC nonrestricted killer (K+) cell line TALL-103/2 (CD3/TCR gamma delta +) was studied to determine whether its lytic defects were at the tumor-binding or post-binding level. The two TALL-103/2 clones were found to display similar mRNA expression of TCR/CD3 comple...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1995.1212
更新日期:1995-10-15 00:00:00
abstract::Chronic allotype suppression was generated in M-1 (C mu), G-1 (C gamma) heterozygous B14 line chickens either by embryonal injection or by maternal transfer of anti-M-1b allotype antibodies. Using a sensitive radioimmunoassay to detect the suppressed IgM-1b, a striking disparity was observed between the degree of supp...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(84)90240-5
更新日期:1984-01-01 00:00:00
abstract::The proliferative responses of natural killer (NK) cells to 12-O-tetradecanoylphorbol-13-acetate (TPA), which directly activates protein kinase c(PKC), and to the Ca2+ ionophores A23817 and ionomycin, known to enhance the intracellular calcium, have been investigated. Highly purified large granular lymphocytes (LGL) w...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(88)90007-x
更新日期:1988-04-15 00:00:00
abstract::Alveolar macrophages are thought to play an important role in ongoing tissue breakdown and repair processes in the normal lung. The secretion and regulation of cathepsin D (important for the final breakdown of collagen) and fibronectin (involved in the healing process) in human peripheral blood monocytes (PBM) and pul...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(90)90320-q
更新日期:1990-04-01 00:00:00
abstract::Micromolar amounts of SV-IV, one of the major proteins secreted from the rat seminal vesicle epithelium, induce in vitro a marked release of a variety of cytokines (interferon-gamma, tumor necrosis factor-alpha, interleukin 6, and granulocyte-monocyte colony-stimulating factor) from human resting peripheral blood mono...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1996.0061
更新日期:1996-03-15 00:00:00
abstract::pp125FAK is a novel protein tyrosine kinase associated with focal adhesions. It has been shown that ligation of VLA beta 1 integrins on a number of cell types enhanced tyrosine phosphorylation and kinase activity of pp125FAK. Cellular transformation by retroviral oncogene products or mitogenic neuropeptides also resul...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1995.1002
更新日期:1995-03-01 00:00:00
abstract::The CD2 (T11) molecule belongs to a family of cell-surface glycoproteins that function as adhesion molecules in the immune system. Human CD2 is found exclusively on cells of the T lineage: peripheral T lymphocytes, NK cells, and thymocytes. CD2 binds specifically to the surface glycoprotein LFA-3. CD2/LFA-3 adhesion i...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1993.1133
更新日期:1993-06-01 00:00:00
abstract::Activated natural killer T (NKT) cells produce a broad range of cytokines, including IL-4 and IFN-gamma, that determine immunomodulatory functions in various animal models. In this report, we show that a well-known proinflammatory cytokine, IL-17 is also produced by a distinct population of NKT cells upon TCR stimulat...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2008.03.004
更新日期:2008-01-01 00:00:00
abstract::Recently, we reported that the CD5 protein can bind to the B cell antigen CD72. So far, no functional evidence has been given for this interaction. We used soluble native CD5 and two anti-CD72 monoclonal antibodies, JT3 and WL225, produced and characterized in our laboratory in order to investigate the role of CD5 in ...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1996.0218
更新日期:1996-08-25 00:00:00
abstract::Senescence is characterized by several alterations in the immune system. Such modifications can be found in lymphoid organs as well as in the cellular components of the immune system. Several reports have suggested that immune dysfunction can affect both T and B cells, but T cells have been shown to be more susceptibl...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2009.01.010
更新日期:2009-01-01 00:00:00
abstract::With old age (∼2y old), mice show substantial differences in B cell composition within the lymphoid tissues. In particular, a novel subset of IgM+ CD21/35lo/- CD23- mature B cells, the age-associated B cells or ABC, increases numerically and proportionately. This occurs at the expense of other B cell subsets, includin...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2017.04.008
更新日期:2017-11-01 00:00:00
abstract::We have analyzed the effect of cyclosporin-A (CsA) on the proliferative and cytotoxic responses induced by mixed-lymphocyte cultures (MLC-s) on low and high density T lymphocytes. Allogeneic stimulation had a different impact on the two subsets. Proliferative and cytotoxic responses were inversely correlated; i.e., hi...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(86)90100-0
更新日期:1986-12-01 00:00:00
abstract::Although it is well known that the CD3/T-cell receptor (TCR) complex modulates from the surface of T cells upon exposure to monoclonal antibodies (mAb) directed against it, the fate of bound mAb has not been yet elucidated. We therefore perform direct binding experiments of 125I-labeled mAb against CD3 or TCR to inves...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(88)90209-2
更新日期:1988-10-01 00:00:00
abstract::Macrophage migration inhibitory factor (MIF), a pro-inflammatory cytokine, played an important role in immune-mediated diseases. The promoter region of MIF, which had functional polymorphisms, controlled MIF expression. MIF polymorphism was associated with many inflammatory diseases. But the association of MIF polymor...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/j.cellimm.2013.04.013
更新日期:2013-04-01 00:00:00
abstract::Depletion of macrophages from human peripheral blood mononuclear cells (PBMC) caused a marked decrease in galactose oxidase and sodium periodate, but not a calcium ionophore, stimulated Interferon-gamma (IFN-gamma) production. Reconstitution of such depleted cultures with galactose oxidase treated macrophages, but not...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(85)90268-0
更新日期:1985-09-01 00:00:00
abstract::Peripheral blood lymphocytes (PBL) from patients with herpes simplex virus (HSV)-1 recurrences in the cornea only (Group I) exhibited reduced lysis of HSV-1-infected targets compared to PBL from patients with oral-facial and corneal HSV recurrences (Group II). The cytotoxic lymphocytes appeared to belong to a subpopul...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(84)90305-8
更新日期:1984-02-01 00:00:00
abstract::T cell hybridomas that are deathless upon TCR crosslinking were generated from lpr mice. The deathless hybridomas (1.4 and 5D5) expressed extremely low Fas even after anti-CD3 activation, whereas activation-induced cell death (AICD) was observed for Fas-expressing hybridomas. The deathless hybridomas were activated to...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1996.0039
更新日期:1996-02-01 00:00:00