Background: Umbilical cord blood (UCB) is an alternative source of hematopoietic stem cell transplantation (HSCT), used in Leukemia treatment. CD26+ cells, a fraction of CD34 positive cells, are a major population of UCB cells which negatively regulate the in vivo homing and engraftment of HSCs. CD26 is highly expressed in various cells such as HSCs, immune cells, fibroblasts, and epithelial ce...

background: umbilical cord blood (ucb) is an alternative source of hematopoietic stem cell transplantation (hsct), used in leukemia treatment. cd26+ cells, a fraction of cd34 positive cells, are a major population of ucb cells which negatively regulate the in vivo homing and engraftment of hscs. cd26 is highly expressed in various cells such as hscs, immune cells, fibroblasts, and epithelial ce...

objective: receptor activator of nuclear factor-kappa b ligand (rankl) appears to be an osteoclast-activating factor, bearing an important role in the pathogenesis of multiple myeloma. some studies demonstrated that u-266 myeloma cell line and primary myeloma cells expressed rank and rankl. it had been reported that the expression of myeloid and monocytoid markers was increased by co-culturing ...

stem cells are self-renewing and undifferentiated cell types that can be differentiate into functional cells. stem cells can be classified into two main types based on their source of origin: embryonic and adult stem cells. stem cells also classified based on the range of differentiation potentials into totipotent, pluripotent, multipotent, and unipotent. multipotent stem cells have the ability...

the complexity of multiple sclerosis (ms) and the incompetence of a large number of promise treatments in ms urge us to plan new and more effective therapeutic approaches that aim to suppress ongoing autoimmune responses and induction of local endogenous regeneration. emerging data propose that hematopoietic, mesenchymal and neural stem cells have the potential to restore self-tolerance, to pro...

introduction: umbilical cord blood (cb) has been identified as a rich source for hematopoietic stem cells (hscs), and has provided an alternative to bone marrow transplantation. the use of ex vivo expanded cells has been suggested as a possible means to accelerate the speed of engraftment in cord blood (cb) transplantation. the main aim of our study is to find the best culture media and conditi...

objective: nowadays, cord blood hematopoietic stem cells (hscs) are known as a valuable source for bone marrow transplantation but unfortunately their insufficient number is a limiting factor for using them in adult bone marrow transplantation. cord blood hcss expansion is an approach to overcome this problem, by inducing their self-renewal. tgf-b signaling pathway is a key inhibitory agent for...

chronic myeloid leukemia (cml) is a myeloproliferative disease of the hematopoietic stem cells, characterized by the presence of the philadelphia (ph) chromosome. although imatinib inhibits the bcr-abl kinase activity, clinical experiences confirm that imatinib may not target cml stem cells in vivo. the identification of signaling pathways responsible for the self-renewal properties of leukemic...

Introduction: Recognition of human leukocyte antigens (HLA) is of importance for hematopoietic stem cell transplantation. Any HLA-mismatches between the donor and recipient can cause graft rejection or other complications. In HLA-typing experiments, usage of HLA-known reference cells accompany with HLA-unknown samples is obligatory. Some international centers represent these cells with high e...