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.
journal_name
Br J Haematoljournal_title
British journal of haematologyauthors
Mattsson J,Uzunel M,Brune M,Hentschke P,Barkholt L,Stierner U,Aschan J,Ringdén Odoi
10.1046/j.1365-2141.2001.03174.xsubject
Has Abstractpub_date
2001-12-01 00:00:00pages
935-44issue
4eissn
0007-1048issn
1365-2141pii
3174journal_volume
115pub_type
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