Showing 2 results for Conditioned Medium
F. Soltani, Dr. F. Amiri, Dr. M. Mohammadipour, M. Jalili, Dr. M. Habibi Roudkenar, Dr. M.a. Jalili,
Volume 12, Issue 4 (1-2016)
Abstract
Abstract
Background and Objectives
Mesenchymal Stem Cells (MSCs) are the ideal cell source for transplantation. But different stresses during MSCs in vitro expansion lead to decreased survival rate after transplantation. Therefore, applying practical strategies to enhance their viability in stressful microenvironment is quite necessary. This study aimed to survey effects of HIF-1&alpha-Nrf2-engineered-MSCs secretome on MSCs survival under different stress conditions.
Materials and Methods
|
Recombinant pcDNA3.1-Nrf2 and pcDNA3.1-HIF-1&alpha were transfected and co-transfected into umbilical cord MSCs (UC-MSCs) using FUGENE HD transfection reagent. After 72 hrs, expression of Nrf2 and HIF-1&alpha were verified by RT-PCR. Different cell groups were exposed to hypoxic, serum deprived and oxidative stress conditions. The HIF-1&alpha-Nrf2-engineered-MSCs secretome was harvested and concentrated. Then, UC-MSCs were cultured in presence of this secretome and their viability was assayed using trypan blue exclusion dye and WST-1 flowing by induction of the same stress conditions.
|
Results
HIF-1&alpha-Nrf2-engineered-MSCs expressed Nrf2 and HIF-1&alpha. HIF-1&alpha-Nrf2-engineered-MSCs indicated a higher survival rate (84.5 ± 5.5%) compared with the control group (55.3 ± 4%). Moreover, the survival rate of UC-MSCs cultured with HIF-1&alpha-Nrf2-engineered-MSCs secretome was 81.6 ± 6% and it was 57.9 ± 4.3% for the control group under the same stress conditions.
Conclusions
HIF-1&alpha-Nrf2-engineered-MSCs secretome protects MSCs against oxidative, serum deprived and hypoxic stress conditions.
F. Jaleh, F. Amiri, M. Dehghan Harati, Dr. M. Habibi Roudkenar, Dr. M.a. Jalili,
Volume 13, Issue 4 (12-2016)
Abstract
Abstract
Background and Objectives
The decrease in mesenchymal stem cells (MSCs) survival rate after transplantation is a major challenge in MSC-cell-therapy. Hence, it is promising to employ some proper strategies for addressing this problem. This study was conducted to assay the therapeutic effects of MSCs treated with Nrf2-manipulated-MSC conditioned medium in acute kidney injury (AKI)-induced animal models.
Materials and Methods
|
In an experimental study, recombinant plasmid pcDNA3.1-Nrf2 was transfected into bone marrow-derived MSCs and the resulted conditioned medium was harvested. The MSCs was cultivated with Nrf2-manipulated-derived conditioned medium. The conditioned medium-treated-MSCs were transplanted to AKI-induced rats (each group containing 10 rats) and the therapeutic potentialities of these MSCs were evaluated using biochemical and pathological methods.
|
Results
Fourteen days after MSCs transplantation, there was a significant difference in BUN decreasing in rat groups injected with conditioned medium-treated-MSCs (48 ± 3.5 mg/dL) in comparison with those injected with normal MSCs (100 ± 9.9 mg/dL) (p < 0.001). The number of observed casts (0.26) in kidney tissue sections of these rat groups were also less than (0.51) the groups transplanted with normal MSCS.
Conclusions
Cultivation of MSCs in the presence of Nrf2-manipulated-derived conditioned medium increase the therapeutic effects of these cells in AKI-induced models.
|
.jpg)
.png)
