乙醇通过调节 microRNAs 和长非编码 RNA 诱导内皮细胞衍生的细胞外囊泡增强的血管生成生物活性。
Ethanol Induces Enhanced Vascularization Bioactivity of Endothelial Cell-Derived Extracellular Vesicles via Regulation of MicroRNAs and Long Non-Coding RNAs.
机构信息
Fischell Department of Bioengineering, University of Maryland, College Park, MD, 20742, United States.
Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland Medical Center, Balitmore, MD, 21201, USA.
出版信息
Sci Rep. 2017 Oct 23;7(1):13794. doi: 10.1038/s41598-017-14356-2.
Extracellular vesicles (EVs), such as exosomes, have been identified as regulators of vascular remodeling and have promise as therapeutics for vascularization applications. Towards development of EVs as therapeutics, it has been demonstrated that physiological stimuli of angiogenic phenotypes in EV-producing cells can enhance the potency of EVs for vascularization. The goal of this study was to assess whether ethanol, which induces angiogenic phenotypes in endothelial cells, could be employed to enhance endothelial-derived EV vascularization bioactivity. The results indicate that ethanol conditioning of endothelial cells increases the ability of endothelial EVs to induce a pro-vascularization response. This response is due in part to increased CD34 expression in recipient endothelial cells that may result from downregulation of microRNA-106b in EVs isolated from ethanol-conditioned producer endothelial cells. Further, ethanol-induced upregulation of long non-coding RNAs (lncRNAs) HOTAIR and MALAT1 in endothelial EVs was observed to play a significant role in mediating pro-angiogenic effects of these vesicles. Overall, these studies validate ethanol conditioning as a method to enhance the bioactivity of endothelial EVs via regulation of EV-associated microRNAs (miRNAs) and, especially, lncRNAs. Further, the results suggest that alcohol consumption may activate endothelial EVs towards a pro-vascularization phenotype, which could have implications for alcohol-induced tumor angiogenesis.
细胞外囊泡(EVs),如外泌体,已被鉴定为血管重塑的调节剂,并有望作为血管生成应用的治疗方法。为了将 EVs 开发为治疗方法,已经证明 EV 产生细胞中血管生成表型的生理刺激可以增强 EV 促进血管生成的效力。本研究的目的是评估乙醇(诱导内皮细胞血管生成表型)是否可用于增强内皮细胞来源的 EV 血管生成生物活性。结果表明,乙醇处理内皮细胞可增加内皮 EV 诱导血管生成反应的能力。这种反应部分归因于受体内皮细胞中 CD34 的表达增加,这可能是由于从乙醇处理的产生细胞中分离出的 EV 中 microRNA-106b 的下调所致。此外,还观察到乙醇诱导的内皮 EV 中长链非编码 RNA(lncRNA)HOTAIR 和 MALAT1 的上调在介导这些囊泡的促血管生成作用中发挥重要作用。总体而言,这些研究通过调节 EV 相关 microRNAs(miRNAs),特别是 lncRNAs,验证了乙醇处理作为增强内皮 EV 生物活性的方法。此外,研究结果表明,酒精摄入可能会使内皮 EV 向促血管生成表型激活,这可能对酒精诱导的肿瘤血管生成有影响。