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Graft-versus-host disease (GvHD) is an inflammatory disease that is unique to allogeneic transplantation. It is an attack by the "new" bone marrow's immune cells against the recipient's tissues. This can occur even if the donor and recipient are HLA-identical because the immune system can still recognize other differences between their tissues.
Hematopoietic stem cell transplantation (HSCT) is the transplantation of multipotent hematopoietic stem cells, usually derived from bone marrow, peripheral blood, or umbilical cord blood. [16] [17] [13] It may be autologous (the patient's own stem cells are used), allogeneic (the stem cells come from a donor) or syngeneic (from an identical twin).
Haematopoietic stem cell transplantation (HSCT) is the transplantation of multipotent haematopoietic stem cells, usually derived from bone marrow, peripheral blood, or umbilical cord blood. [ 10 ] [ 11 ] [ 12 ] It may be autologous (the patient's own stem cells are used), allogeneic (the stem cells come from a donor) or syngeneic (from an ...
One difference between these cell types, despite the similarity in function, is that CAR cells may be found in both endosteal and perivascular niches, while nestin-positive MSCs are found exclusively in the perivascular niche. Both ECs and adipocytes have been suggested to influence HSC activity in the bone marrow.
A bone marrow harvest in progress The preferred sites for the procedure. In a bone marrow transplant, hematopoietic stem cells are removed from a person and infused into another person or into the same person at a later time . If the donor and recipient are compatible, these infused cells will then travel to the bone marrow and initiate blood ...
The administered hematopoietic stem cells then migrate to the recipient's bone marrow, through a process known as stem cell homing, where the transplanted cells override the previous bone marrow. This allows the bone marrow to recover, proliferate and continue producing healthy blood cells. [citation needed] The transplantation may be ...
The four main types of tissue transplantation are xenotransplantation, allotransplantation, isotransplantation and autotransplantation, while the common tissues transplanted include skin, bone, corneal and vessel grafts. [3] Tissue transplantation comes with risks and complications, including immune rejection and viral infections.
Bone marrow is extracted from the donor's pelvic bones while the donor is under general or local anesthesia. PBSCs are collected from the donor's blood after five or six days of taking a drug that causes hematopoietic cells in the bone marrow to move into the circulating blood. In both cases, recovery is usually swift and donors typically have ...
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