Abstract:
:Human peripheral blood T cells lysed autologous or allogeneic monocytes, but not polymorphonuclear cells (PMN) or lymphocytes, in the presence of anti-CD3 (OKT3 (IgG2a) or anti-Leu 4 (IgG1)) monoclonal antibody (mAb). Other mAbs such as OKT4 (IgG2b), OKT8 (IgG2a), OKT11 (IgG2a), and OKM1 (IgG2a) did not mediate lysis of monocytes. Lysis of monocytes also did not occur in the presence of F(ab')2 fragments of OKT3 mAb. OKT3 mAb and control murine IgG2a mAb, but not F(ab')2 fragments of OKT3 mAb, were bound to the monocyte cell surface. Purified human IgG1 and IgG3 myeloma proteins, polyclonal human IgG, or Con A inhibited anti-CD3-dependent T-cell cytotoxicity against monocytes when added to the 4-hr 51Cr-release assay. Pretreatment of monocytes with an irrelevant murine IgG2a mAb also inhibited OKT3 mAb (IgG2a)-dependent lysis of these cells, but did not affect anti-Leu 4 mAb (IgG1)-dependent lysis, suggesting that two different Fc receptors were involved. These results strongly suggest that Fc IgG receptors on monocytes are a critical structure for anti-CD3-dependent cytotoxicity. Lysis of monocytes was accompanied by interleukin-1 (IL-1) production, which was detected in supernatants from 4-hr cultures of T cells and monocytes in the presence of the OKT3 mAb. Both anti-CD3-dependent lysis of monocytes and IL-1 production were severely decreased after treatment of T cells with either OKT3 or OKT8 mAb plus complement, but were not affected significantly by treatment with the OKT4 mAb plus complement. Purified CD8+ cells, prepared using the cell sorter, exhibited significant levels of anti-CD3-dependent monocyte lysis (greater than 10%). In contrast, purified CD4+ cells did not exhibit significant levels of anti-CD3-dependent cytotoxicity (less than 10%). Production of high concentrations of IL-1 was observed in cultures of purified CD8+ cells and monocytes in the presence of anti-CD3 mAb. Only low concentrations of IL-1 were detected in cultures of purified CD4+ cells, monocytes, and OKT3 mAb. These results suggest that CD8+ cells are primarily responsible for lysis of monocytes, which is associated with IL-1 production. It appears that anti-CD3 mAb brings CD8+ T cells and monocytes into close proximity by binding to the CD3 antigen on T cells and to the Fc IgG receptor on monocytes. This interaction results in lysis of monocytes primarily by CD8+ cells, after bypassing any antigen recognition requirements that may be otherwise needed. Lysis of monocytes appears to be associated with IL-1 release.
journal_name
Cell Immunoljournal_title
Cellular immunologyauthors
Itoh K,Balch CM,Trial J,Platsoucas CDdoi
10.1016/0008-8749(88)90320-6subject
Has Abstractpub_date
1988-07-01 00:00:00pages
257-71issue
2eissn
0008-8749issn
1090-2163pii
0008-8749(88)90320-6journal_volume
114pub_type
杂志文章abstract::We have previously reported that antibody secretion by B.22 hybridoma cells can be suppressed in an MHC-restricted manner, by idiotype-specific T cells. It was shown that T cells of both helper and suppressor phenotypes are involved, and that the suppression is mediated by soluble factors. In the present paper, we hav...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(89)90288-8
更新日期:1989-10-15 00:00:00
abstract::A fibroblastoid cell line TSt-4 was established from fetal thymus tissue of C57BL/6 mice. When fetal thymus (FT) cells or CD4-8- (DN) cells of adult thymuses were cultured on the monolayer of TSt-4, a considerable proportion of lymphocytes expressed CD4 or both CD4 and CD8 within 1 day, and the CD4+CD8- cells were mai...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(92)90299-5
更新日期:1992-07-01 00:00:00
abstract::Inhibition of DPP IV has been shown to abrogate the stress-related increase in murine abortions and a concomitant increase in gamma-interferon. The aim of the present study was to investigate a potential impact of the DPP IV inhibitor Isoleucine Cyanopyrrolidide on the expression of surface antigens involved in T-cell...
journal_title:Cellular immunology
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更新日期:2002-12-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(84)90309-5
更新日期:1984-02-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1996.0123
更新日期:1996-05-01 00:00:00
abstract::Interleukin 4 (IL-4)-induced IgE production by normal peripheral blood mononuclear cells (PBMC) and E- cells (PBMC partially depleted of T cells) was significantly enhanced by leukotriene B4(LTB4) in a dose-dependent manner, whereas LTB4 by itself was not effective for IgE production. The potentiating effect of LTB4 w...
journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1994.1158
更新日期:1994-06-01 00:00:00
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doi:10.1016/0008-8749(90)90201-2
更新日期:1990-08-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1999.1581
更新日期:1999-11-25 00:00:00
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更新日期:2016-02-01 00:00:00
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journal_title:Cellular immunology
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更新日期:2012-01-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(86)90314-x
更新日期:1986-04-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(83)90372-6
更新日期:1983-03-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1997.1121
更新日期:1997-05-25 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1006/cimm.1998.1379
更新日期:1998-11-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(89)90380-8
更新日期:1989-02-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(90)90227-i
更新日期:1990-09-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
doi:10.1016/0008-8749(91)90267-f
更新日期:1991-06-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
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更新日期:1998-06-15 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
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更新日期:1988-10-15 00:00:00
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更新日期:1983-09-01 00:00:00
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journal_title:Cellular immunology
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更新日期:2004-11-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
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更新日期:1989-12-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
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更新日期:1996-12-15 00:00:00
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journal_title:Cellular immunology
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更新日期:2008-01-01 00:00:00
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更新日期:1987-05-01 00:00:00
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journal_title:Cellular immunology
pub_type: 杂志文章
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更新日期:1994-03-01 00:00:00
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doi:10.1016/j.cellimm.2006.06.009
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abstract:PURPOSE:We aim to evaluate the effects of atorvastatin on the expression of Toll-like receptor (TLR4) protein and mRNA, and to explore their effects on TLR4-dependent downstream signaling in human monocytic leukemia (THP-1) cells. METHODS:TLR4 protein and mRNA expression, levels of NF-κB protein, and expression of TNF...
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更新日期:2012-09-01 00:00:00