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Showing 3 results for Endothelial Cell

Meysam Ganjibakhsh, Masomeh Asadi, Vahid Nejati, Nowroz Delirezh, Farah Farokhi,
Volume 15, Issue 2 (6-2012)
Abstract

Background: Since researchers were able to produce dendritic cells (DCs) from peripheral blood monocytes, many scientists have been in search of discovering the best way of producing dendritic cells and optimizing the DCs maturation processes in vitro to treat some diseases. The aim of this study was to investigate the maturation of DCs for tumor immunotherapy. Materials and Methods: In this experimental study, DCs were produced in two stages. In the first stage, monocyte cells were converted to immature DCs by GM-CSF and IL-4. In the second stage, immature DCs were made mature in the presence of human umbilical vein endothelial cells and PHA -activated T lymphocytes conditioned media and maturation factors. Results: The produced DCs with appropriate phenotype, phagocytosis ability, and proliferation of T lymphocytes stimulation traits could secrete high levels of cytokines. Conclusion: Endothelial cells and T lymphocytes conditioned media can produce Th1 and DC1 in vitro. Therefore, DCs produced through this method are suitable for immunotherapy treatment applications and cancer treatment through treatment cells.
Homa Dadgarnia, Zahra Hajebrahimi,
Volume 19, Issue 2 (5-2016)
Abstract

Background: Endothelial cells are very sensitive to mechanical force including microgravity and the morphological and functional changes in them are believed to be at the basis of weightlessness-induced cardiovascular deconditioning. It has been shown that the proliferation, migration, and morphological differentiation of endothelial cells play critical roles in angiogenesis. So far, the influence of microgravity on the ability of endothelial cells to foster angiogenesis remains to be explored in detail. The aim of this study was to investigate the effect of microgravity condition on VEGFR-2 and CD34 genes expression in human umbilical vein endothelial cells (HUVEC) in angiogenesis.

Materials and Methods: In this study, HUVEC cells were purchased from Pastor Institute. We used a clinostat to simulate microgravity condition for 2, 24 and 72 hours. Real time PCR technique was used for gene expression analysis after extraction of RNA from cells.

Results:  Our results showed that microgravity for 72h leads to a significant increase (6 times compared with control group, p<0.001) in the VEGFR-2 gene expression. However, expression of CD34 did not change (p>0.05) with microgravity.

Conclusion: Based on the results, microgravity has positive effect on angiogenesis and can be used to generate vascules for cell therapy of ischemic diseases and atherosclerosis.


Sanaz Alizadeh, Naser Aghdami, Bagher Seyed Alipour,
Volume 20, Issue 1 (4-2017)
Abstract

Abstract

Background: Copper nanoparticles (Cu NPs) induced angiogenesis, has been adapted to respond the most important challenging in wound healing. But due to the toxicity of nanoparticles, the nontoxic concentrations is important. The aim of this study was to determine the concentration and size of copper nanoparticles for investigating the effect of its cytotoxicity on the endothelial cell.

Materials and Methods: In this study, we exposed Cu NPs (40nm) with concentrations of 1, 10, 100 μM and 1 ,10 mM to endothelial cells and evaluate its viability effect after 24, 48 and 72 hours, according to the MTS) Methy Thiazol Tetrazolium (assay. Its optical density was determined using an ELISA reader and then was recorded.

Results: The findings demonstrated that Cu NPs was significantly (p<0.05) cytotoxic in concentration higher than 100 μM and cell viability was significantly increased following 48 and 72 hours in all concentrations, so that, the most difference was seen in 100 µM concentration. The IC50 values of Cu NPs at incubation time 24, 48 and 72 hours were 31.44, 36.67 and 29.38 μM.

Conclusion: The results showed that different concentration of Cu NPs in the 48 and 72 hours didn’t cause any cytotoxicity effect, but it stimulated endothelial cell proliferation. Therefore, Cu NPs with dose and time dependent effect has been increased endothelial cell proliferation.



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