Exposure of platelet fibrinogen receptors by a monoclonal antibody to CD9 antigen.

Exposure of platelet fibrinogen receptors by a monoclonal antibody to CD9 antigen.
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CD9 抗原单克隆抗体暴露血小板纤维蛋白原受体。

DOI:
10.1182/blood.v72.1.224.224
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发表时间:
1988
期刊:
影响因子:
20.3
通讯作者:
Yuzuru Kobayashi
Yuzuru Kobayashi
中科院分区:
医学1区
文献类型:
--
作者:
T. Hato;K. Ikeda;Masaki Yasukawa;A. Watanabe;Yuzuru Kobayashi

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我们发现,CD 9抗原的单克隆抗体,PMA 2,诱导纤维蛋白原结合血小板,并检查了这一机制。通过其与24,000-道尔顿蛋白的免疫印迹反应性、与血小板和常见急性淋巴细胞白血病(ALL)细胞的反应性以及与称为CD 9抗体的ALB 6抗体的竞争性结合,证实了PMA 2识别CD 9抗原。在饱和时,PMA 2结合到每个血小板的大约46,000个位点。125 I-纤维蛋白原与血小板的结合以PMA 2浓度依赖性方式发生,并被EDTA或抗糖蛋白(GP)IIb-IIIa单克隆抗体阻断。PMA 2刺激的血小板引起ATP分泌和血栓素B2合成在非搅拌条件下。使用磷酸肌酸/肌酸磷酸激酶(CP/CPK)和阿司匹林研究了分泌的ADP和血栓素在纤维蛋白原结合和随后的血小板聚集中的作用。单独使用CP/CPK或阿司匹林可将纤维蛋白原结合率降低至20%至30%;然而,这种结合率足以支持完全的血小板聚集。CP/CPK和阿司匹林联合治疗可消除纤维蛋白原的结合和聚集。这些结果表明,IgG分子与CD 9抗原的结合通过分泌的ADP和血栓烷两者暴露纤维蛋白原受体,并且两者中的任一者可以暴露受体至足以使血小板聚集的程度。
We found that a monoclonal antibody to CD9 antigen, PMA2, induces fibrinogen binding to platelets and examined the mechanism for this. That PMA2 recognized the CD9 antigen was confirmed by its immunoblot-reactivity with a 24,000-dalton protein, reactivity with platelets and common acute lymphoblastic leukemia (ALL) cells, and competitive binding with the ALB6 antibody known as the CD9 antibody. At saturation, PMA2 bound to approximately 46,000 sites per platelet. The binding of 125I-fibrinogen to platelets occurred in a PMA2 concentration-dependent manner and was blocked by EDTA or an anti-glycoprotein (GP)IIb-IIIa monoclonal antibody. PMA2-stimulated platelets caused ATP secretion and thromboxane B2 synthesis under non-stirred conditions. The role of secreted ADP and thromboxane in fibrinogen-binding and subsequent platelet aggregation was studied using creatine phosphate/creatine phosphokinase (CP/CPK) and aspirin. CP/CPK or aspirin alone reduced fibrinogen binding to 20% to 30%; however, this binding was sufficient to support full platelet aggregation. Combined treatment with CP/CPK and aspirin abolished fibrinogen binding and aggregation. These results demonstrate that the binding of IgG molecules to the CD9 antigen exposes fibrinogen receptors through both secreted ADP and thromboxane and that either one of both can expose the receptors to an extent sufficient to aggregate platelets.
前列腺素内过氧化物类似物的血小板聚集和纤维蛋白原受体的暴露。
DOI: --
发表时间: 1983
期刊: Blood
影响因子: 20.3
作者:
Morinelli,TA;Niewiarowski,S;Kornecki,E;Figures,WR;Wachtfogel,Y;Colman,RW
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发表时间: 1987-01
期刊: The Journal of biological chemistry
影响因子: --
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发表时间: 1983
期刊: Blood
影响因子: 20.3
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通讯作者: G. Minno;P. Thiagarajan;B. Perussia;J. Martínez;S. Shapiro;G. Trinchieri;S. Murphy
DOI: --
发表时间: 1986
期刊: Blood
影响因子: 20.3
作者:
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肾上腺素以及肾上腺素和 ADP 的组合诱导人血小板上的纤维蛋白原受体。
DOI: --
发表时间: 1980
期刊: The Journal of biological chemistry
影响因子: --
作者:
Plow,EF;Marguerie,GA
通讯作者: Marguerie,GA