Affiliation:
1. Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College Chengdu Sichuan China
2. Department of Laboratory The First Affiliated Hospital of Chengdu Medical College Chengdu Sichuan China
Abstract
AbstractBackground and ObjectivesAged red blood cell (RBC) transfusions in lung cancer patients are often related to cancer recurrence and shorter lifespans. Extracellular vesicles (EVs) accumulated in stored RBC suspensions may be one of the important influential factors. This study aims to investigate how EVs derived from RBC suspensions affect the progress of lung cancer through the most enriched microRNAs (miRNAs) previously reported in our research.Study Design and MethodsEVs derived from stored RBC suspensions in Weeks 1, 3 and 5 were harvested via ultracentrifugation. Lung adenocarcinoma H1975 cells were co‐cultured with EVs and transfected with miR1246 and miR150‐3p mimics to evaluate alterations in their proliferation, invasion and migration abilities in vitro. Proteomics and bioinformatics were performed to predict the signalling pathway related to invasion and migration of H1975, which were verified by western blotting (WB) and flow cytometry.ResultsEVs derived from stored RBC suspensions in Weeks 3 and 5 could significantly enhance the invasion and migration ability of H1975 cells and also increase the expression of miR1246 and miR150‐3p. After transfection with miR1246 and miR150‐3p mimics, invasion, migration and proliferation of H1975 cells were obviously enhanced. Proteomics analysis demonstrated that EVs co‐cultivation and miRNA transfection groups were both enriched in cell adhesion molecules. WB and cytometry indicated that integrin beta‐1 (ITGB1) and Rap1b were increased.ConclusionsEVs derived from stored RBC suspensions can enhance invasion and migration ability of lung cancer cells via the most accumulated miR1246 and miR150‐3p, which may increase the expression of ITGB1 through Rap1 signalling pathway.