چاپ صفحه |  صفحه نخست سامانه |  چکیده مقاله |  نویسندگان |  دانلود مقاله | دانشگاه علوم پزشکی تبریز |
| Human endothelial progenitor cells (EPCs) were isolated from cord blood samples and enriched by magnetic activated cell sorting method based on the CD133 marker. Cells were incubated with different doses of bacterial lipopolysaccharide, ranging from 2, 5, 10, 50, 100, 200, 250, 500, to 1000 µg/ml, for 48 h. The cell survival rate was determined by using MTT assay. To confirm activation of the toll-like receptor signaling pathway, PCR array analysis was performed. Protein levels of ERK1/2, p-ERK1/2, NF-ƙB and TRIF proteins were measured using western blotting. The content of TNF-α and lipoprotein lipase activity were analyzed by immunofluorescence imaging. Flow cytometric analysis of CD31 was performed to assess the maturation rate. Cell migration was studied by the Transwell migration assay. The expression of genes related to exosome biogenesis was measured using real-time PCR analysis. In vivo gel plug angiogenesis assay was done in nude mice. Lipopolysaccharide changed endothelial progenitor cells’ survival in a dose-dependent manner with maximum viable cells in groups treated with 2 µg/ml. PCR array analysis showed the activation of toll-like signaling pathways after exposure to LPS (p<0.05). Western blotting analysis indicated an induction of p-ERK1/2 and Erk1/2, NF-kB and TRIF in LPS-treated EPCs compared with the control (p<0.05). Immunofluorescence staining showed an elevation of TNF-α and lipoprotein lipase activity after lipopolysaccharide treatment (p<0.05). Lipopolysaccharide increased EPC migration and expression of exosome biogenesis-related genes (p<0.05). In vivo gel plug analysis revealed enhanced angiogenesis in cells exposed to bacterial lipopolysaccharide. Data highlighted the close relationship between the toll-like receptor signaling pathway and functional activity in EPCs. |
| نویسنده | نفر چندم مقاله |
|---|---|
| مرتضی حیدرزاده | اول |
| شیرین صابریان پور | سوم |
| مهدی احمدی | چهارم |
| مهدی حسن پور | پنجم |
| حسام سقائی باقری | ششم |
| مهدی طالبی | هشتم |
| مسعود دارابی امین | یازدهم |
| رضا رهبرقاضی | دوازدهم |
| نام فایل | تاریخ درج فایل | اندازه فایل | دانلود |
|---|---|---|---|
| Heidarzadeh2021_Article_ActivationOfToll-likeReceptorS.pdf | 1400/03/10 | 5104993 | دانلود |
