تخلیه آهن توسط دفروکسامین، سلولهای بنیادی مزانشیمی مشتق از مغز استخوان را در مقابل آپوپتوز ناشی از استرس اکسیداتیو محافظت می کند.

عنوان انگليسی

Iron depletion with deferoxamine protects bone marrow-derived mesenchymal stem cells against oxidative stress-induced apoptosis

خلاصه انگلیسی

Bone marrow`s mesenchymal stem cells (BM-MSCs) are multipotent cells with self-renewal properties making them an ideal candidate for regenerative medicine. Recently, numerous studies show that about more than 99% of transplanted cells are destroyed because of the stressful microenvironment. Meanwhile, in the target organs, iron overload can produce oxidative stress introducing it as the most important stress factor. This study was aimed at increasing of BM-MSCs viability against oxidative stress microenvironment using iron depletion by deferoxamine (DFO). Mesenchymal stem cells are isolated and characterized from rat`s bone marrow. Then, the sensitivity of BM-MSCs against H2O2 -induced oxidative stress was evaluated through half of the inhibitory concentration (IC50) estimation by using MTT assay. The maximum non-inhibitory concentration of DFO on BM-MSCs was determined. The next step was the comparison between DFO pre-treated BM-MSCs and untreated cells against H2O2-induced apoptosis. BM-MSCs were identified with morphologic and flowcytometry analysis. IC50 of H2O2 was determined as 0.55 mM at 4 hours. Also, the maximum non-inhibitory concentration of DFO was ascertained as 5µM at 48 hours. Our results demonstrated that pretreatment with DFO significantly potentiates BM-MSCs against H2O2-induced oxidative stress which confirmed by MTT assay, AO/EB double staining, DAPI staining, and activated caspase 3 quantification as well as western blot test. Expression of cleaved caspase 3 and pAKT/AKT ratio obviously demonstrated DFO can resist the cells against cytotoxicity. These findings may help to develop better stem cell culture medium for MSC-based cell therapy. Moreover, regulation of cell stress can be used in practical subjects.

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