Seyed Majid Jalalian Hosseini; Javad Baharara; Shahrbanoo Oryan; Mohammad Amin Kerachian
Abstract
Glutamine (Gln) is an essential amino acid with a wide range of cellular functions and is necessary for cell proliferation. It is usually added to the culture media in the form of L-glutamine, which is highly unstable and degrades in a temperature-dependent manner during the culture period. Although, ...
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Glutamine (Gln) is an essential amino acid with a wide range of cellular functions and is necessary for cell proliferation. It is usually added to the culture media in the form of L-glutamine, which is highly unstable and degrades in a temperature-dependent manner during the culture period. Although, Gln is beneficial for the cells, its degradation produces ammonia which is toxic and negatively affect cell culture. Pheochromocytoma cells (PC-12), originating from cancerous cells of the rat adrenal gland, are considered as a suitable model to study the differentiating effects of different factors. Previous studies showed the importance of Gln in the normal growth and differentiation of the cells. Alginate, is one of the biomaterials currently used as a natural scaffold for the induction of neuronal differentiation. In the present experimental research, the effect of stable and elevated levels of Gln on the growth and neuronal differentiation of PC-12 cells was compared under 2D- and 3D- (sodium alginate hydrogel beads) culture conditions. The cells’ viabilities were determined and compared between experimental groups using live/dead cell staining by Acridine orange/Propidium iodide (AO/PI), and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test. Furthermore, cells were stained using cresyl violet to detect neuronal Nissl bodies. The induction of differentiation was confirmed using immunocytochemical analysis of Nestin and β-tubulin III proteins and Cells’ nuclei were counterstained with 4′,6-diamidino-2-phenylindole (DAPI). Results showed that high concentration of Gln can induce neuronal differentiation in PC-12 cells under both 2D- and 3D- culture conditions and increases the expression of progenitor and mature neuronal markers Nestin and β-tubulin III, respectively.
ُSheida Shahraki; Hanieh Jalali; Kazem Parivar; Nasim Hayati Roudbari; Mohammad Nabiuni; Zahra Heidari
Abstract
Background: Amniotic membrane derived stem cells (AMSCs) have considerable advantages to use in regenerative medicine and their anti- inflammatory effects, growth factor secretion and differentiation potential make them suitable candidates for stem cell therapy of nervous system. The developing and neonatal ...
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Background: Amniotic membrane derived stem cells (AMSCs) have considerable advantages to use in regenerative medicine and their anti- inflammatory effects, growth factor secretion and differentiation potential make them suitable candidates for stem cell therapy of nervous system. The developing and neonatal brain contains a spectrum of growth factors to direct development of endogenous and donor cells. Using an in vitro model system, we investigated the plasticity and potential of mouse AMSCs to differentiate into neural cells in response to neonatal mice brain extracted medium.
Methods: Mouse amniotic membrane stem cells were isolated from embryos, cultured in presence of medium derived from neonatal mouse brain medium and immunohistochemistry and flow cytometry analyses were used to explore the neural differentiation of them.
Results: Isolated amnion membrane stem cells showed high rate of viability and proliferation and presented neural characters in the presence of neonatal brain extracted medium such morphological changes and Nestin and Map-2 expression.
Conclusion: In conclusion, results from this study showed that amnion membrane derives stem cells are potent stem cells to respond to environmental signals promoting them to neural fate.