Platelets were isolated and purified via density centrifugation and immune depletion of CD45+ cells using human CD45 MicroBeads reagent (Miltenyi Biotec GmbH, Bergisch Gladbach, Germany) according to manufacturer’s instructions. [15 (link),16 (link)]. At last, a MACS® bead separation system (Miltenyi Biotec GmbH) was used to collect leukocyte-depleted platelets with purity >99.99%. Platelet RNA was extracted RNA with AG RNAex pro (Accurate Biotechnology (Hunan) Co., Ltd., Changsha, China). An Agilent Bioanalyzer was used for RNA quality control.
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