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一种蛋白质组学方法揭示了在不同温度下储存后人类血小板蛋白组成的变化。

A proteomic approach reveals the variation in human platelet protein composition after storage at different temperatures.

机构信息

a Department of Blood Transfusion , Southwest Hospital, the Third Military Medical University , Chongqing , P.R. China.

出版信息

Platelets. 2019;30(3):403-412. doi: 10.1080/09537104.2018.1453060. Epub 2018 Mar 29.

Abstract

Cryopreservation can slow down the metabolism and decrease the risk of bacterial contamination. But, chilled platelets (PLTs) show a reduced period in circulation due to the rapid clearance by hepatic cells or spleen macrophages after transfusion. The deleterious changes that PLTs undergo are mainly considered the result of PLT protein variation. However, the basis for proteomic variation of stored PLTs remains poorly understood. Besides count, activation markers (CD62P and Annexin V), and aggregation, we used quantitative mass spectrometry to create the first comprehensive and quantitative human PLT proteome of samples stored at different temperatures (22°C, 10°C and -80°C). We found different conditions caused different platelet storage lesion (PSL). PLT count was decreased no matter at what temperature stored. PLTs viability at low temperature dropped by 21.78% and 11.21%, respectively, as compared 10.26% at room temperature, there were no significant differences between the storage methods. Membrane expression of CD62P gradually increased in all groups especially stored at 22°C up to 40% and 10°C up to 30%. However, exposure of PS on the PLT membrane was below 1% in every group. The PLT proteome showed there were 575 and 454 potential proteins identified by general iTRAQ analysis and phosphorylation iTRAQ a nalysis, respectively, among them, 33 common differentially expressed proteins caused by storage time and 44 caused by storage temperature Especially, membrane-bound proteins (such as FERMT3, STX4, MYL9 and TAGLN2) played key roles in PLT storage lesion. The pathways "Endocytosis", "Fc gamma R-mediated phagocytosis" and "Regulation of actin cytoskeleton" were affected predominantly by storage time. And the pathways "SNARE interactions in vesicular transport" and "Vasopressin-regulated water reabsorption" were affected by cold storage in our study. Proteomic results can help us to understand PLT biochemistry and physiology and thus unravel the mechanisms of PSL in time and space for more successful PLT transfusion therapy.

摘要

冷冻保存可以减缓新陈代谢速度,降低细菌污染的风险。但是,冷藏血小板(PLT)在输注后由于被肝实质细胞或脾巨噬细胞迅速清除,其循环时间会缩短。PLT 发生的有害变化主要被认为是 PLT 蛋白变异的结果。然而,储存 PLT 蛋白质组学变异的基础仍知之甚少。除了计数、激活标志物(CD62P 和 Annexin V)和聚集外,我们还使用定量质谱技术创建了不同温度(22°C、10°C 和-80°C)下储存的人 PLT 蛋白质组的第一个全面和定量图谱。我们发现不同的条件导致了不同的血小板储存损伤(PSL)。无论在什么温度下储存,PLT 计数都会减少。低温下 PLT 的存活率分别下降了 21.78%和 11.21%,而室温下仅下降了 10.26%,不同储存方式之间无显著差异。各组 CD62P 的膜表达均逐渐增加,尤其是在 22°C 组增加到 40%,在 10°C 组增加到 30%。然而,在每个组中,PLT 膜上 PS 的暴露都低于 1%。PLT 蛋白质组学显示,通过通用 iTRAQ 分析和磷酸化 iTRAQ 分析分别鉴定出 575 种和 454 种潜在蛋白质,其中 33 种由储存时间引起的差异表达蛋白和 44 种由储存温度引起的差异表达蛋白。特别是,膜结合蛋白(如 FERMT3、STX4、MYL9 和 TAGLN2)在 PLT 储存损伤中起关键作用。“内吞作用”、“FcγR 介导的吞噬作用”和“肌动蛋白细胞骨架的调节”途径主要受储存时间的影响。而在本研究中,“囊泡运输中的 SNARE 相互作用”和“加压素调节的水重吸收”途径受低温储存的影响。蛋白质组学结果可以帮助我们了解 PLT 的生化和生理学,从而及时揭示 PSL 在时间和空间上的机制,为更成功的 PLT 输血治疗提供帮助。

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