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- Mattsson, Jonas, 1966, et al.
(author)
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Mixed chimaerism is common at the time of acute graft-versus-host disease and disease response in patients receiving non-myeloablative conditioning and allogeneic stem cell transplantation.
- 2001
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In: British journal of haematology. - : Wiley. - 0007-1048. ; 115:4, s. 935-44
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Journal article (peer-reviewed)abstract
- We report the clinical outcome and results of chimaerism analysis in various cell lineages of 30 patients given non-myeloablative conditioning, followed by allogeneic stem cell transplantation (SCT). The commonest diagnoses were chronic myelogenous leukaemia (n = 11) and solid tumours (n = 11). Twenty-one patients received SCT from human leucocyte antigen (HLA)-identical siblings and nine from matched unrelated donors. Median patient age was 53 (28-77) years. Four non-myeloablative protocols were used, including fludarabine (30 mg/m2 x 3-6), busulphan (4 mg/kg x 2), cyclophosphamide (Cy) (30 mg/kg/day x 2) or total body irradiation (2 Gy), and anti-thymocyte globulin. The patients were analysed by polymerase chain reaction (PCR) analysis of minisatellites on days 14, 21 and 28, then every other week up to 3 months and monthly thereafter. All samples were cell separated for T, B and myeloid cells using immunomagnetic beads. Eighteen patients were alive at a median follow-up of 11 (6-20) months. Acute graft-versus-host disease (GVHD) occurred in 22 patients. Eighteen of the 22 patients with acute GVHD showed mixed chimaerism (MC) in the T-cell fraction at the time of acute GVHD. However, all patients with acute GVHD showed donor chimaerism (DC) in the T-cell fraction median 76 (7-414) days after onset versus three out of eight patients without acute GVHD, P < 0.001]. Disease response was diagnosed in 15 patients, median 100 (37-531) days after SCT. At the time of disease response, six out of 15 patients showed MC in the T-cell fraction. In conclusion, mixed chimaerism in the T-cell fraction is common at the time of acute GVHD and disease response in patients conditioned with non-myeloablative therapy.
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- Omazic, B, et al.
(author)
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Reconstitution of the ig heavy chain CDR3 repertoire after allogeneic haematopoietic stem cell transplantation with myeloablative or reduced-intensity conditioning regimens
- 2005
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In: Scandinavian Journal of Immunology. - : Wiley. - 1365-3083 .- 0300-9475. ; 61:1, s. 72-81
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Journal article (peer-reviewed)abstract
- The objective of this study was to investigate B-lymphocyte reconstitution in patients undergoing allogeneic haematopoietic stem cell transplantation (HSCT) after myeloablative conditioning (MAC) or reduced-intensity conditioning (RIC) regimens. B-lymphocyte reconstitution was studied by monitoring the CDR3 repertoire with spectratyping. We demonstrate a delay in the recovery of the B-lymphocyte repertoire, measured by variation in size distribution of the immunoglobulin H CDR3 in patients conditioned with RIC compared to MAC. We found no general explanation for this finding, but when clinical data for each patient were studied in detail, we could identify a cause for the oligoclonality of the B-lymphocyte repertoire after HSCT with RIC for each of the patients. Older patients and donors, low cell dose at transplantation, relapse, graft-versus-host disease (GVHD) and its treatment as well as cytomegalovirus infection and its treatment are all possible causes for the restriction of the B-lymphocyte repertoire observed in this study. Taken together, reconstitution of the B-lymphocyte repertoire after HSCT is a process dependent on multiple factors and differs between patients. The conditioning regimen may be of importance, but data from this study suggest that individual factors and the various complications occurring after HSCT are more likely to determine the development of the B-lymphocyte repertoire.
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- Svahn, BM, et al.
(author)
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Home care during the pancytopenic phase after allogeneic hematopoietic stem cell transplantation is advantageous compared with hospital care
- 2002
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In: Blood. - : American Society of Hematology. - 0006-4971 .- 1528-0020. ; 100:13, s. 4317-4324
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Journal article (peer-reviewed)abstract
- After myeloablative treatment and allogeneic stem cell transplantation (SCT), patients are kept in isolation rooms in the hospital to prevent neutropenic infections. During a 3-year period, patients were given the option of treatment at home after SCT. Daily visits by an experienced nurse and daily phone calls from a physician from the unit were included in the protocol. We compared 36 patients who wished to be treated at home with 18 patients who chose hospital care (control group 1). A matched control group of 36 patients treated in the hospital served as control group 2. All home care patients had hematologic malignancies and 19 were in first remission or first chronic phase. Of the donors, 25 were unrelated. The patients spent a median of 16 days at home (range, 0-26 days). Before discharge to the outpatient clinic after SCT, patients spent a median of 4 days (range, 0-39 days) in the hospital. In the multivariate analysis, the home care patients were discharged earlier (relative risk [RR] 0.33, P = .03), had fewer days on total parenteral nutrition (RR 0.24, P < .01), less acute graft-versus-host disease (GVHD) grades II-IV (RR 0.25,P = .01), lower transplantation-related mortality rates (RR 0.22, P = .04), and lower costs (RR 0.37, P < .05), compared with the controls treated in the hospital. The 2-year survival rates were 70% in the home care group versus 51% and 57% (not significant) in the 2 control groups, respectively (P < .03). To conclude, home care after SCT is a novel and safe approach. This study found it to be advantageous, compared with hospital care.
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