title: [Frequency of the development of RNA-rich reticulocytes in allogeneic bone marrow transplant recipients].
abstract: We measured appearance rates of RNA-rich reticulocytes in 8 patients undergoing allogeneic bone marrow transplantation, using a Sysmex R-1000 reticulocyte counter which utilizes laser flow cytometry. The changes in proportion of RNA-rich reticulocytes (high fluorescence ratio: HFR) and maturation index (MI: HFR + middle fluorescence ratio/low fluorescence ratio) were compared with those of WBC, neutrophil or reticulocyte counts. Engraftment was defined as an HFR of greater than or equal to 5% or a MI of greater than or equal to 15%. Engraftment was confirmed significantly earlier by HFR (13.5 +/- 2.4 days) and MI (13.1 +/- 2.9 days) than by neutrophils (17.1 +/- 3.2 days) or reticulocytes (20.4 +/- 6.2 days). The maturation of reticulocytes would be a useful indicator for engraftment or recovery from marrow aplasia in cases of bone marrow transplantation.
mesh_terms: D000293:Adolescent; D000328:Adult; D016026:Bone Marrow Transplantation / Q000502:physiology*; D002648:Child; D002675:Child, Preschool; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D007223:Infant; D008297:Male; D012313:RNA / Q000032:analysis*; D012156:Reticulocytes / Q000737:chemistry*
chemical_list: D012313:RNA