Proteomic analyses identify a potential mechanism by which extracellular vesicles aggravate ischemic stroke

Publication date: Available online 7 June 2019Source: Life SciencesAuthor(s): Xintong Wang, Jiaoqi Wang, Xiaohua Shi, Chengliang Pan, Hongyu Liu, Yue Dong, Rui Dong, Jing Mang, Zhongxin XuAbstractAimsExtracellular vesicles (EVs) are vital for information exchange between donor and recipient cells. When cells are stressed (e.g., by oxygen glucose deprivation, OGD), the complex information carried by the EVs is altered by the donor cells. Here, we aimed to analyze the proteomic differences between EVs derived from OGD-damaged cells and EVs derived from undamaged cells to explore the potential mechanisms by which EVs aggravate ischemic stroke (IS).Main methodsEVs released by rat adrenal gland PC12 cells subjected to 0, 3, 6, or 12 h of OGD were isolated. The proteins from the EVs secreted by each of the OGD groups were profiled using liquid chromatography-tandem mass spectroscopy (LC-MS/MS). We predicted the functions, pathways, and interactions of the differentially expressed proteins using Gene Ontology (GO), KEGG pathways, and STRING. We used parallel reaction monitoring (PRM) to validate our results.Key findingsWe identified several differentially expressed proteins in the OGD groups as compared to the controls: 170 proteins in the 3 h OGD EVs, 44 proteins in the 6 h OGD EVs, and 77 proteins in the 12 h OGD EVs (fold-change ≥1.5; p ≤ 0.05). These proteins were associated with oxidative stress, carbohydrate metabolism, protein synthesis and degradation, and th...
Source: Life Sciences - Category: Biology Source Type: research