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Serum outperforms plasma in small extracellular vesicle microRNA biomarker studies of adenocarcinoma of the esophagus

引用

World Journal of Gastroenterology 2020年第20期26卷 2570-2583页

作者： Karen Chiam George C Mayne Tingting Wang David I Watson Tanya S Irvine Tim Bright Lorelle T Smith Imogen A Ball Joanne M Bowen Dorothy M Keefe Sarah K Thompson Damian J Hussey Discipline of Surgery College of Medicine and Public HealthFlinders University of South AustraliaAdelaideSA 5042Australia Flinders Health and Medical Research Institute Cancer Program College of Medicine and Public HealthFlinders UniversityAdelaideSA 5042Australia Discipline of Surgery The University of AdelaideAdelaideSA 5005Australia Adelaide Medical School The University of AdelaideAdelaideSA 5005Australia Faculty of Health Sciences The University of AdelaideAdelaideSA 5005Australia

BACKGROUND Circulating microRNAs(miRNAs)are potential biomarkers for many ***,they can originate from non-disease specific sources,such as blood cells,and compromise the investigations for miRNA *** small extracellular vesicles(sEVs)have been suggested to provide a purer source of circulating miRNAs for biomarkers discovery,the most suitable blood sample for sEV miRNA biomarker studies has not been *** To compare the mi RNA profiles between matched serum and plasma s EV preparations to determine their suitability for biomarker *** Matched serum and plasma samples were obtained from 10 healthy controls and10 patients with esophageal adenocarcinoma.s EV isolates were prepared from serum and plasma using Exo Quick TM and quantified using Nano *** was extracted from s EV preparations with the mi RNeasy Serum/Plasma kit and profiled using the Taqman Openarray q *** overall mi RNA content and theexpression of specific mi RNAs of reported vesicular and non-vesicular origins were compared between serum and plasma s EV *** diagnostic performance of a previously identified multi-mi RNA biomarker panel for esophageal adenocarcinoma was also *** The overall mi RNA content was higher in plasma s EV preparations(480 mi RNAs)and contained 97.5%of the mi RNAs found in the serum s EV preparations(412 mi RNAs).The expression of commonly expressed mi RNAs was highly correlated(Spearman’s R=0.87,P<0.0001)between the plasma and serum s EV preparations,but was consistently higher in the plasma s EV *** blood-cell mi RNAs(hsa-mi R-223-3 p,hsa-mi R-451 a,mi R-19 b-3 p,hsa-mi R-17-5 p,hsa-mi R-30 b-5 p,hsa-mi R-106 a-5 p,hsa-mi R-150-5 p and hsa-mi R-92 a-3 p)were expressed at 2.7 to 9.6 fold higher levels in the plasma s EV preparations compared to serum s EV preparations(P<0.05).In plasma s EV preparations,the percentage of protein-associated mi RNAs expressed at relatively higher levels(Ct

关键词： Biomarkers Exosomes Extracellular vesicles Circulating microRNA MicroRNAs Plasma Serum Blood cells Real-time polymerase chain reaction adenocarcinoma of esophagus

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