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  • Title: Serum stem cell growth factor for monitoring hematopoietic recovery following stem cell transplantation.
    Author: Ito C, Sato H, Ando K, Watanabe S, Yoshiba F, Kishi K, Furuya A, Shitara K, Sugimoto S, Kohno H, Hiraoka A, Hotta T.
    Journal: Bone Marrow Transplant; 2003 Aug; 32(4):391-8. PubMed ID: 12900775.
    Abstract:
    Stem cell growth factor (SCGF) is a novel cytokine for primitive hematopoietic progenitor cells. Although it has burst-promoting activity and granulocyte/macrophage colony-promoting activity in vitro, its significance in hematopoiesis in vivo has not been elucidated. In this study, we have established enzyme-linked immunosorbent assay (ELISA) to quantify human SCGF and measured serum cytokines in normal volunteers and 27 patients undergoing stem cell transplantation (SCT), including six autologous and 21 allogeneic transplants. SCGF levels gradually increased after SCT regardless of graft-versus-host disease or type of transplant. The maximum level of SCGF was observed during the rapid granulocyte recovery phase in patients subjected to an autologous transplantation, and during the granulocyte stabilization phase in allogeneic patients. SCGF levels in PBSCT patients began to rise earlier than in BMT patients. Two patients with no increment of SCGF after SCT showed delayed engraftment. The source of SCGF was further analyzed by RT-PCR and we found that SCGF was highly expressed in bone marrow (BM) CD34(+) and CD34(-)CD33(+) cells, but not in BM CD34(-)CD33(-) cells, BM stromal cells and peripheral blood cells. The cell population expressing SCGF in BM possess the colony-forming cell activity. Therefore, serum SCGF can be an indicator of hematopoietic recovery following SCT.
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