miRNA-seq of human (>70 years old) plasma derived extracellular vesicle
Total RNA was extracted using Trizol reagent (Invitrogen, CA, USA) following the manufacturer's procedure. The total RNA quality and quantity were analysis of Bioanalyzer 2100 (Agilent, CA, USA) with RIN number >7.0. Approximately 1 ug of total RNA were used to prepare small RNA library according to protocol of TruSeq Small RNA Sample Prep Kits(Illumina, San Diego, USA). And then we performed the single-end sequencing 50bp on an Illumina Hiseq 2500