PMID- 11071665 OWN - NLM STAT- MEDLINE DCOM- 20010111 LR - 20210216 IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 96 IP - 10 DP - 2000 Nov 15 TI - Limited engraftment capacity of bone marrow-derived mesenchymal cells following T-cell-depleted hematopoietic stem cell transplantation. PG - 3637-43 AB - The engraftment capacity of bone marrow-derived mesenchymal cells was investigated in 41 patients who had received a sex-mismatched, T-cell-depleted allograft from human leukocyte antigen (HLA)-matched or -mismatched family donors. Polymerase chain reaction (PCR) analysis of the human androgen receptor (HUMARA) or the amelogenin genes was used to detect donor-derived mesenchymal cells. Only 14 marrow samples (34%) from 41 consenting patients generated a marrow stromal layer adequate for PCR analysis. Monocyte-macrophage contamination of marrow stromal layers was reduced below the levels of sensitivity of HUMARA and amelogenin assays (5% and 3%, respectively) by repeated trypsinizations and treatment with the leucyl-leucine (leu-leu) methyl ester. Patients who received allografts from 12 female donors were analyzed by means of the HUMARA assay, and in 5 of 12 cases a partial female origin of stromal cells was demonstrated. Two patients who received allografts from male donors were analyzed by amplifying the amelogenin gene, and in both cases a partial male origin of stromal cells was shown. Fluorescent in situ hybridization analysis using a Y probe confirmed the results of PCR analysis and demonstrated in 2 cases the existence of a mixed chimerism at the stromal cell level. There was no statistical difference detected between the dose of fibroblast progenitors (colony-forming unit-F [CFU-F]) infused to patients with donor- or host-derived stromal cells (1.18 +/- 0.13 x 10(4)/kg vs 1. 19 +/- 0.19 x 10(4)/kg; P >/=.97). In conclusion, marrow stromal progenitors reinfused in patients receiving a T-cell-depleted allograft have a limited capacity of reconstituting marrow mesenchymal cells. FAU - Cilloni, D AU - Cilloni D AD - Department of Hematology, University of Parma, Parma, Italy. FAU - Carlo-Stella, C AU - Carlo-Stella C FAU - Falzetti, F AU - Falzetti F FAU - Sammarelli, G AU - Sammarelli G FAU - Regazzi, E AU - Regazzi E FAU - Colla, S AU - Colla S FAU - Rizzoli, V AU - Rizzoli V FAU - Aversa, F AU - Aversa F FAU - Martelli, M F AU - Martelli MF FAU - Tabilio, A AU - Tabilio A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Blood JT - Blood JID - 7603509 SB - IM MH - Adult MH - Bone Marrow Cells/cytology MH - Cell Culture Techniques MH - Cell Division/genetics MH - Female MH - Graft Survival/*immunology MH - Hematopoiesis/genetics MH - Hematopoietic Stem Cell Transplantation/*methods/standards MH - Histocompatibility Testing MH - Humans MH - In Situ Hybridization, Fluorescence MH - *Lymphocyte Depletion MH - Male MH - Mesoderm/*cytology MH - Middle Aged MH - Myelodysplastic Syndromes/therapy MH - Myeloid Progenitor Cells MH - Polymerase Chain Reaction MH - Sex Factors MH - Stromal Cells/cytology MH - Tissue Donors MH - Transplantation Chimera/genetics MH - Transplantation, Homologous/methods EDAT- 2000/11/09 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/11/09 11:00 PHST- 2000/11/09 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/11/09 11:00 [entrez] AID - S0006-4971(20)48308-9 [pii] PST - ppublish SO - Blood. 2000 Nov 15;96(10):3637-43.