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Endothelial progenitor cell (EPC) recruitment and angiogenesis play crucial roles in aneurysm neck endothelialization, but the mechanisms of EPC recruitment and angiogenesis are still unclear. Recent studies have shown that long noncoding RNAs (lncRNAs) can regulate the function and differentiation of cells in various ways. LncRNA TUG1 is involved in liver cancer and glioma-mediated angiogenesis. The aim of this study was to investigate the role of lncRNA TUG1 in regulating EPC migration and differentiation. Overexpression and knockdown of lncRNA TUG1 with lentivirus, scratch assays, Transwell assays and tube formation assays using EPCs isolated from rat bone marrow showed that lncRNA TUG1 overexpression promoted EPC migration, invasion and differentiation. Moreover, ELISAs showed that lncRNA TUG1 overexpression increased VEGF expression. Bioinformatics prediction, luciferase assays, Western blots and RIP assays indicated that lncRNA TUG1 functions as a ceRNA (competing endogenous RNA) for miR-6321 and that miR-6321 inhibits EPC migration and differentiation through its target, ATF2. As a potential therapeutic target, lncRNA TUG1 may play a vital role in the pathogenesis of aneurysms.
This article was published in the following journal.
Name: Experimental cell research
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Cells derived from BONE MARROW that circulate in the adult bloodstream and possess the potential to proliferate and differentiate into mature ENDOTHELIAL CELLS.
Glycoproteins found on immature hematopoietic cells and endothelial cells. They are the only molecules to date whose expression within the blood system is restricted to a small number of progenitor cells in the bone marrow.
The cells in the erythroid series derived from MYELOID PROGENITOR CELLS or from the bi-potential MEGAKARYOCYTE-ERYTHROID PROGENITOR CELLS which eventually give rise to mature RED BLOOD CELLS. The erythroid progenitor cells develop in two phases: erythroid burst-forming units (BFU-E) followed by erythroid colony-forming units (CFU-E); BFU-E differentiate into CFU-E on stimulation by ERYTHROPOIETIN, and then further differentiate into ERYTHROBLASTS when stimulated by other factors.
A 200-230-kDa tyrosine kinase receptor for vascular endothelial growth factors found primarily in endothelial and hematopoietic cells and their precursors. VEGFR-2 is important for vascular and hematopoietic development, and mediates almost all endothelial cell responses to VEGF.
Proto-oncogene proteins fes are protein-tyrosine kinases with a central SH2 DOMAIN. It has been implicated in SIGNAL TRANSDUCTION PATHWAYS for CELL DIFFERENTIATION of a variety of cell types including MYELOID PROGENITOR CELLS. Fes proto-oncogene proteins also bind TUBULIN and promote MICROTUBULE assembly.
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