P-selectin Glycoprotein Ligand-1 Is the Major Counter-receptor for P-selectin on Stimulated T Cells and Is Widely Distributed in Non-functional Form on Many Lymphocytic Cells *

P-selectin Glycoprotein Ligand-1 Is the Major Counter-receptor for P-selectin on Stimulated T Cells and Is Widely Distributed in Non-functional Form on Many Lymphocytic Cells *
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P-选择素糖蛋白配体-1 是受刺激 T 细胞上 P-选择素的主要反受体,并以非功能形式广泛分布在许多淋巴细胞上 *

DOI:
10.1074/jbc.270.37.21966
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发表时间:
1995
期刊:
The Journal of Biological Chemistry
影响因子:
--
通讯作者:
D. Cumming
D. Cumming
中科院分区:
--
文献类型:
--
作者:
G. Vachino;X. Chang;G. Veldman;Ravindra Kumar;D. Sako;L. Fouser;M. Berndt;D. Cumming

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p -选择素糖蛋白配体-1 (PSGL-1)是髓细胞上p -选择素的高亲和力拮抗受体(Sako, D, Chang, X. J, Barone, K. M, Vachino, G., White, H. M, Shaw, G., Veldman, G. M., Bean, K. M., Ahern, T. J, Furie, B., Cumming, D. A., Larsen, G. R.(1993)细胞75,1179-1186)。本研究表明,PSGL-1也广泛分布于T淋巴细胞和B淋巴细胞肿瘤细胞系、静息外周血T细胞和B细胞,以及受刺激的外周血T细胞和肠上皮内淋巴细胞(IEL)细胞系上。然而,大多数psgl -1阳性的静息外周血淋巴细胞和淋巴样肿瘤细胞系不显示显著的p -选择素结合。相比之下,体外刺激的外周血T细胞和IEL细胞系强烈结合p -选择素,而PSGL-1是唯一介导这种结合的高亲和力拮抗受体。在体外刺激过程中,细胞表面PSGL-1的表达水平不随p -选择素结合的增加而改变。相反,据报道,在受刺激的T淋巴细胞系中,两种糖基转移酶的活性参与髓细胞中功能性PSGL-1的产生,其活性明显高于静息T淋巴细胞,这与激活依赖的翻译后事件有助于淋巴细胞功能性PSGL-1表达的假设一致。
P-selectin glycoprotein ligand-1 (PSGL-1) is the high affinity counter-receptor for P-selectin on myeloid cells (Sako, D., Chang, X. J., Barone, K. M., Vachino, G., White, H. M., Shaw, G., Veldman, G. M., Bean, K. M., Ahern, T. J., Furie, B., Cumming, D. A., and Larsen, G. R.(1993) Cell 75, 1179-1186). Here we demonstrate that PSGL-1 is also widely distributed on T- and B-lymphocytic tumor cell lines, resting peripheral blood T and B cells, and on stimulated peripheral blood T cell and intestinal intraepithelial lymphocyte (IEL) lines. However, the majority of PSGL-1-positive resting peripheral blood lymphocytic cells and lymphoid tumor cell lines do not display significant P-selectin binding. In contrast, in vitro stimulated peripheral blood T cell and IEL lines avidly bind P-selectin, and PSGL-1 is the sole high affinity counter-receptor mediating this binding. During the course of in vitro stimulation, cell surface expression levels of PSGL-1 do not change as P-selectin binding increases. Rather, the activities of two glycosyltransferases reportedly involved in the production of functional PSGL-1 in myeloid cells are substantially higher in the stimulated T-lymphocytic lines than in resting T lymphocytes, consistent with the hypothesis that activation-dependent post-translational events contribute to the expression of functional PSGL-1 on lymphocytes.
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来自人中性粒细胞的 P-选择素糖蛋白配体显示唾液酸化、岩藻糖基化、O-连接的聚-N-乙酰基乳糖胺。
DOI: --
发表时间: 1994
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发表时间: 1990
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