کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
3840113 | 1247889 | 2015 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Eltrombopag enhances platelet adhesion by upregulating the expression of glycoprotein VI in patients with chronic immune thrombocytopenic purpura
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کلمات کلیدی
MFIribosomal protein L19GPIIbFli1RPL19GPIIIaGPVIGPIb5-chloromethylfluorescein diacetateCMFDATPOvWFRT-PCRSmall interfering RNA - RNA تداخل کوچکsiRNA - siRNAhealthy adults - بزرگسالان سالمThrombopoietin - ترومبوپوتیینVon Willebrand factor - عامل فون ویلبراندmean fluorescence intensity - میانگین شدت فلورسانسITP - و غیره.real-time polymerase chain reaction - واکنش زنجیره ای پلیمراز واقعی در زمان واقعیImmune thrombocytopenic purpura - پالپور ترومبوسیتوپنی ایمنیSurface coverage - پوشش سطحglycoprotein VI - گلیکوپروتئین VI
موضوعات مرتبط
علوم پزشکی و سلامت
پزشکی و دندانپزشکی
پزشکی و دندانپزشکی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Eltrombopag, a thrombopoietin receptor agonist, has been approved for the treatment of patients with immune thrombocytopenia because of its abilities to enhance platelet production and reduce hemorrhage. Both platelet count and platelet adhesion are crucial to stop bleeding. Although eltrombopag is known to improve platelet counts, its effects on platelet adhesion are not yet known. This study aimed to assess the efficacy of eltrombopag on platelet production and platelet adhesive affinity. To evaluate the efficacy of low-dose eltrombopag (25 mg) for patients with chronic refractory immune thrombocytopenic purpura (ITP) and to determine the ex vivo platelet adhesion ability before and after treatment with eltrombopag, we conducted an open-label, multicenter study in which 25 Taiwanese patients with chronic ITP were enrolled. During the 6-month evaluation, the starting and maximum doses of eltrombopag were 25 and 50 mg, respectively, to maintain the platelet count of â¥50,000 per μL. Flow-based adhesion assay was used to detect the percentage of platelets adhering to immobilized von Willebrand factor-collagen on microslides. Of the enrolled patients, 48% achieved a platelet count of â¥50,000 per μL. Interestingly, 83% of all responders required 25 mg of eltrombopag daily to achieve the target platelet count. In addition, the percentage of bleeding patients was significantly reduced in both responders and nonresponders by 50% from the baseline level throughout the treatment period. The ex vivo platelet adhesion capacity was elevated after the 6-month eltrombopag treatment in both responders and nonresponders. Furthermore, glycoprotein VI (GPVI) expression was significantly upregulated after treatment with eltrombopag. Low-to-intermediate dose of eltrombopag showed good efficacy to expedite platelet production and augment platelet adhesion. These 2 factors might explain the efficacy of eltrombopag in ameliorating hemorrhage in patients with ITP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Translational Research - Volume 166, Issue 6, December 2015, Pages 750-761.e4
Journal: Translational Research - Volume 166, Issue 6, December 2015, Pages 750-761.e4
نویسندگان
Tzeon-Jye Chiou, Yi-Fang Chang, Ming-Chung Wang, Chen-Wei Kao, Hsuan-Yu Lin, Tsai-Yun Chen, Erh-Jung Hsueh, Yii-Jenq Lan, Yung-Chuan Sung, Sheng-Feng Lin, Li-Yuan Bai, Caleb G. Chen,