Regulation of CR3 (CD11b/CD18)-dependent natural killer (NK) cell cytotoxicity by tumour target cell MHC class I molecules.
Regulation of CR3 (CD11b/CD18)-dependent natural killer (NK) cell cytotoxicity by tumour target cell MHC class I molecules.
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肿瘤靶细胞 MHC I 类分子对 CR3 (CD11b/CD18) 依赖性自然杀伤 (NK) 细胞细胞毒性的调节。
DOI:
10.1046/j.1365-2249.1999.00800.x
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发表时间:
1999
影响因子:
4.6
通讯作者:
Ross,GD
中科院分区:
文献类型:
--
作者:
Vĕtvicka,V;Hanikýrová,M;Vĕtvicková,J;Ross,GD
Phagocyte and NK cell CR3 functions as both an adhesion molecule and an iC3b receptor mediating cytotoxic responses to microorganisms. Cytotoxic activation of iC3b receptor function requires ligation of both a CD11b I-domain site for iC3b and a lectin site located in the C-terminus of CD11b. Because tumours lack the CR3-binding polysaccharides of bacteria and fungi, iC3b-opsonized tumours do not stimulate CR3-dependent cytotoxicity. Previous studies showed that NK cells could be induced to kill iC3b-opsonized tumours with small soluble β-glucans that bound with high affinity to CR3, bypassing the absence of similar polysaccharides on tumour membranes. Because CR3 signalling requires several tyrosine phosphorylation events, it appeared possible that CR3-dependent killing of autologous tumour cells might be suppressed by NK cell inhibitory receptors for MHC class I (KIR and CD94/NKG2) whose action involves recruitment of SHP-1 and SHP-2 tyrosine phosphatases. In the current study, Epstein–Barr virus (EBV)-transformed B cells were used as targets following opsonization with iC3b. Soluble β-glucan primed CR3 for killing of iC3b-coated B cells, but autologous class I-bearing targets were 84% more resistant than class I-deficient Daudi cells. Blockade of target cell class I with a MoAb specific for a domain recognized by both KIR and CD94/NKG2 resulted in comparable killing of class I+B cells. By contrast, another MoAb to class II had no effect on cytotoxicity. These data suggest that NK cell recognition of class I suppresses CR3/tyrosine kinase-dependent cytotoxicity in the same way as it suppresses cytotoxicity mediated by other tyrosine kinase-linked receptors such as FcγRIIIA (CD16).
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影响因子:
4.3
作者:
E. Yefenof;G. Klein;K. Kvarnung
通讯作者:
K. Kvarnung
影响因子:
56.9
作者:
K. Irie;R. Irie;D. Morton
通讯作者:
D. Morton
DOI:
--
发表时间:
1980
期刊:
Clinical Immunology and Immunopathology
影响因子:
--
作者:
R. Schreiber;M. K. Pangburn;R. Medicus;H. Müller
通讯作者:
H. Müller
DOI:
--
发表时间:
1989
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Ohlen,C;Bejarano,MT;Gronberg,A;Torsteinsdottir,S;Franksson,L;Ljunggren,HG;Klein,E;Klein,G;Karre,K
通讯作者:
Karre,K
影响因子:
--
作者:
Lynda D. O'Rear;G. D. Ross
通讯作者:
G. D. Ross