Coated-platelets retain amyloid precursor protein on their surface.

Coated-platelets retain amyloid precursor protein on their surface.
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包被的血小板在其表面保留淀粉样前体蛋白。

DOI:
10.1080/09537100500181913
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发表时间:
2006
期刊:
Platelets.
影响因子:
--
通讯作者:
Dale,GeorgeL
Dale,GeorgeL
中科院分区:
--
文献类型:
--
作者:
Prodan,CalinI;Szasz,Robert;Vincent,AndreaS;Ross,ElliottD;Dale,GeorgeL

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包被血小板是由胶原和凝血酶双激动剂激活产生的一种血小板亚群,其特征是几种促凝剂α颗粒蛋白在细胞表面有很强的滞留。在这份报告中,我们证明了与单一激动剂激活的血小板中APP的切割不同,包被的血小板也在其表面保留了全长淀粉样前体蛋白(APP)。此外,蛋白质印迹分析表明,APP在包被血小板合成过程中发生了衍生化反应。我们随后测量了阿尔茨海默病(AD)患者的包被血小板生成量。2 2例AD患者外周血小板膜含量分布较广,但受损程度最轻的AD患者外周血中外周血小板膜水平明显高于老年对照组(41.0 ± 9.9vs.28.7 ± 11.4%; ± 1SD;p= 0.017)。这些发现表明,包被的血小板可能是早期AD患者APP异常处理的一种模式。
Coated-Platelets are a subset of platelets produced by dual-agonist activation with collagen plus thrombin and are characterized by strong retention of several procoagulant, α-granule proteins on the cell surface. In this report we demonstrate that coated-platelets also retain full-length amyloid precursor protein (APP) on their surface in contrast to the cleavage of APP in platelets activated with a single agonist. In addition, western blot analysis indicated that APP is derivatized during coated-platelet synthesis. We subsequently measured coated-platelet production in patients with Alzheimer's disease (AD). Twenty-two AD patients showed a wide distribution of coated-platelet values; however the least impaired AD patients produced coated-platelets at a level significantly above that of aged controls (41.0 ± 9.9 vs. 28.7 ± 11.4%; mean ± 1SD;p= 0.017). These findings suggest that coated-platelets may be a model of aberrant APP processing in early AD patients.
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