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Change of platelet activation markers using flow cytometry in patients with hematology/oncology disorders after transfusion.

机译:血液学/肿瘤学疾病患者输血后使用流式细胞仪检测血小板活化标志物的变化。

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摘要

In spite of the frequent need of platelet transfusions, there is limited information on the association of platelet activation markers, in transfused patients with hematology/oncology disorders, with platelet function using flow cytometry. The goal of this study was to evaluate the changes of PAC-1 binding and CD62P expression, with or without agonists in patients after transfusions. Twenty-eight whole blood samples were obtained from 24 patients admitted to the department of Hematology & Oncology and transfused with platelets; these samples were compared to 30 healthy controls. Whole blood samples, either with or without agonists, such as 20 microM adenosine diphosphate (ADP) or 100 microM thrombin receptor activating peptide (TRAP), were stained with the fluorescein conjugated monoclonal antibodies PAC-1 or CD62P. Then, the percent expression for each marker was analysed using flow cytometry. ADP and TRAP induced an increased percentage of CD62P expression and PAC-1 binding after platelet transfusions compared to the samples studied before transfusion, and these findings were lower than those of the healthy controls. However, the expression of platelets without the agonists was not significantly changed, despite the transfusions. Therefore, agonist-induced platelet activation markers, studied by flow cytometry, appear to be more useful for the evaluation of platelet function after transfusions than platelet activation markers without agonists.
机译:尽管经常需要输注血小板,但在血液学/肿瘤学紊乱的输血患者中,使用流式细胞仪检测血小板活化标志物与血小板功能之间的联系的信息有限。这项研究的目的是评估输注后有无激动剂的PAC-1结合和CD62P表达的变化。从血液和肿瘤科收治的24例患者中抽取了28份全血样品,并进行了血小板输注。将这些样品与30个健康对照进行比较。用荧光素偶联的单克隆抗体PAC-1或CD62P对有或没有激动剂(例如20 microM腺苷二磷酸(ADP)或100 microM凝血酶受体激活肽(TRAP))的全血样品进行染色。然后,使用流式细胞仪分析每种标记物的表达百分比。与输血前研究的样品相比,血小板输注后ADP和TRAP诱导了CD62P表达和PAC-1结合的百分比增加,这些发现低于健康对照组。然而,尽管进行了输注,但没有激动剂的血小板表达并没有明显改变。因此,通过流式细胞术研究的激动剂诱导的血小板活化标志物似乎比不含激动剂的血小板活化标志物更有助于输血后血小板功能的评估。

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