severe combined immunodeficiency is a true pediatric emergency; children with scid were the first patients with immunodeficiencies to be successfully transplanted with unrelated and t-cell-depleted, haploidentical bone marrow. the pattern of inheritance of scid is x-linked and autosomal recessive (ada def, jak3, rag1, rag2, il 7rα). in this case report, we describe a one-year-old boy with b+t- ...

introduction: in 1989, the first successful umbilical cord blood transplantations (ucbts) was reported in a boy with fanconi's anemia, using umbilical cord (ucb) of his hla matched sister. cord blood transplantation is a good substitute for bone marrow or peripheral blood transplantation especially for children and small body size adults. methods: between 1998 and 2007 ,14 children(10 boys and ...

introduction: human leukocyte antigen (hla) genes are the most polymorphic loci in the human genome. they predict the outcome of transplantation by detecting self from non-self antigens. the best use of hla typing is to find a hla-match donor for bmt candidate patients. evidence suggests that matching unrelated donors and recipients for hla-a, -b and -drb1 loci is a prediction for an improved o...

Cord blood hematopoietic stem cells are widely used as an alternative source for hematopoietic stem cells transplant. Increasing rate of patients who need hematopoietic stem cells transplant and many advantages of cord blood in comparison to bone marrow hematopoietic stem cells, have promoted banking of cord blood units. Cord blood banking requires accurate steps in donor selection, cord blood ...

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...

Background: Dendritic cells (DCs) are the most potent stimulators of primary T cell responses and play a key role in immune reactions after stem cell transplantation. Very little is known about the cord blood (CB) dendritic cells and their potential involvement in the low incidence and lower severity of acute graft-versus-host disease after CB transplantation.   Objectives: The aim of this stud...

cord blood hematopoietic stem cells are widely used as an alternative source for hematopoietic stem cells transplant. increasing rate of patients who need hematopoietic stem cells transplant and many advantages of cord blood in comparison to bone marrow hematopoietic stem cells, have promoted banking of cord blood units. cord blood banking requires accurate steps in donor selection, cord blood ...

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...