PMID- 12590713 OWN - NLM STAT- MEDLINE DCOM- 20031106 LR - 20061115 IS - 1525-8165 (Print) IS - 1525-8165 (Linking) VI - 11 IP - 6 DP - 2002 Dec TI - Human mesenchymal stem cells are not of donor origin in patients with severe aplastic anemia who underwent sex-mismatched allogeneic bone marrow transplant. PG - 977-84 AB - Stromal defects are part of the etiology of severe aplastic anemia (SAA), and hematopoietic engraftment is poor in unrelated and mismatched transplant. Therefore, we wanted to find out whether human mesenchymal stem cells (MSC) are partly of donor origin in patients with SAA years after successful bone marrow transplant (BMT). Three SAA patients 3, 5, and 8 years after BMT (cyclophosphamide, ATG) with bone marrow from an HLA-identical sibling donor of the opposite sex were investigated. MSC were grown from patients' bone marrow aspirates according to Caplan et al. The number of MSC that were isolated from SAA bone marrow post transplant was about 10 times lower than in normal controls. Primary cultures of adherent MSC and passage-one cells were analyzed by dual-color interphase fluorescence in situ hybridization (FISH) analysis using centromere-specific DNA probes for X and Y chromosome. FISH did not show any clear evidence of donor cells in the adherent MSC: In all cases, less than 0.5% of nuclei showed a donor-type signal pattern that is well within assay limits. In a female patient, the absence of male donor cells was confirmed by sensitive and quantitative, Y chromosome-specific TaqMan PCR (QYCS-PCR). In contrast, Ficoll-separated hematopoietic cells from the same aspirates were greater than 90% of donor origin, as expected. In SAA, as previously found in patients with lysosomal and peroxisomal storage disease, bone marrow MSC remain host-derived despite successful hematopoietic engraftment years after allogeneic BMT. FAU - Stute, Norbert AU - Stute N AD - Bone Marrow Transplant Center, University Clinic Hamburg-Eppendorf, Hamburg, Germany. stute@uke.uni-hamburg.de FAU - Fehse, Boris AU - Fehse B FAU - Schroder, Jens AU - Schroder J FAU - Arps, Sonke AU - Arps S FAU - Adamietz, Peter AU - Adamietz P FAU - Held, Karsten R AU - Held KR FAU - Zander, Axel R AU - Zander AR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Hematother Stem Cell Res JT - Journal of hematotherapy & stem cell research JID - 100892915 SB - IM MH - Adult MH - Anemia, Aplastic/*pathology/therapy MH - Bone Marrow Cells/cytology MH - *Bone Marrow Transplantation MH - Cell Lineage MH - Female MH - Follow-Up Studies MH - Graft Survival MH - Hematopoiesis MH - Humans MH - Immunohistochemistry MH - In Situ Hybridization, Fluorescence MH - Male MH - Mesoderm/*cytology MH - Middle Aged MH - Stem Cells/*cytology MH - *Transplantation Chimera MH - Transplantation, Homologous EDAT- 2003/02/20 04:00 MHDA- 2003/11/07 05:00 CRDT- 2003/02/20 04:00 PHST- 2003/02/20 04:00 [pubmed] PHST- 2003/11/07 05:00 [medline] PHST- 2003/02/20 04:00 [entrez] AID - 10.1089/152581602321080646 [doi] PST - ppublish SO - J Hematother Stem Cell Res. 2002 Dec;11(6):977-84. doi: 10.1089/152581602321080646.