Immunosuppressive therapies using calcineurin inhibitors, such as cyclosporine A, are associated with a higher incidence of squamous cell carcinoma formation in mice and humans. Calcineurin is believed to suppress tumorigenesis in part through Nfatc1, a transcription factor expressed primarily in hair follicle bulge stem cells in mice. However, mice overexpressing a constitutively active Nfatc1...

Multipotent stem cells with neural crest-like properties have been identified in the dermis of human skin. These neural crest stem cell (NCSC)-like cells display self-renewal capacity and differentiate into neural crest derivatives, including epidermal pigment-producing melanocytes. NCSC-like cells share many properties with aggressive melanoma cells, such as high migratory capabilities and exp...

introduction: stem cell biology has been the subject of much recent discussion. embryonic stem (es) cells, derived from the inner cell mass of the blastocyst stage of early mammalian embryos are expected to become a powerful tool in future regenerative medicine and developmental biology due to their capacity of self-renewal and pluripotency. in the present study, the ultrastructural development...

introduction: nowadays, spermatogonial stem cells (sscs) cultivation has been used by many researchers as an effective tool for infertility treatments. oxidative conditions can be effective on cell proliferation and differentiation of these cells. so, the aim of this study was to establish oxidative stress model for antioxidant activity of some drugs investigation during sscs in vitro culture. ...

bachgroun: hematopoietic stem cell derived from umbilical cord blood (ucb) has been used for regenerative medicine in hematological abnormalities. micrornas are important regulators of gene expression that control both physiological and pathological processes such as development of tissue and cancer. some studies have shown that mir-33, has a critical role in control of self-renewal cells. here...

background: mesenchymal stem cells (mscs) have been recently received increasing attention for cell-based therapy, especially in regenerative medicine. however, the low survival rate of these cells restricts their therapeutic applications. it is hypothesized that autophagy might play an important role in cellular homeostasis and survival. this study aims to investigate the regenerative potentia...

background: retinoic acid as one of the most important regulators for cell differentiation was examined in this study for differentiation of human umbilical mesenchymal cells (hucm). methods: after isolation, hucm were evaluated for mesenchymal stem cell properties by flow cytometry and alkaline phosphatase assay. also, doubling time of the cells and their differentiation potential into adipoge...

there are two main methods for preparing the puramatrix (pm) as a three-dimensional (3-d) scaffold for supporting the cells including surface plating and encapsulation. in the surface-plating procedure, the scaffold is created by adding an ionic agent such as medium to pm. after adjusting the ph by changing the medium, cells are seeded on top of the scaffold. in the encapsulation method, pm and...