title: [Origin of mesenchymal stem cells in bone marrow of patients after allogeneic stem cell transplantation].
abstract: The aim of this study was to investigate the origin of bone marrow-derived mesenchymal cells in 34 patients who had received a sex-mismatched hematopoietic stem cells transplant (HSCT). The mesenchymal stem cells (MSC) from 34 patients were collected for test. The different passage MSC of patients were analyzed by flow cytometry (FCM) to reveal the cell surface antigen expression. The polymerase chain reaction (PCR) analysis of the amelogenin (AMEL) genes was used to detect donor cells from host cells. The cultured MSC were stained by fluorescence in situ hybridization (FISH) probes for chromosomes X (Xp11.1-Xq11.1) and Y (Yq12) to distinguish donor cells from host cells. The results indicated that 31 out of 34 cases showed the confluent stroma and 24 out of these 31 cases were successfully passaged for more than 5 generations which could be used for PCR and FISH analysis. According to FCM results the number of CD14+CD45+ cells, which was regarded as monocyte/macrophage from the cultured MSC (passage 5) was less than 0.04%. In PCR assay, the marrow-derived MSC from the passage 5 were found to be of host origin. FISH assay demonstrated that marrow-derived MSC from the passage 5 were found to be of host origin up to 100%. It is concluded that the origin of MSC in bone marrow of patients after allogeneic stem cell transplantation was confirmed to be derived still from the recipients their own.
authors.affiliation: People's Hospital, Institute of Hematology, Peking University, Beijing 100044, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: Kai-Yan
authors.initials: KY
authors.lastname: Liu
authors.forename: Dao-Pei
authors.initials: DP
authors.lastname: Lu
mesh_terms: D000293:Adolescent; D000328:Adult; D001854:Bone Marrow Cells / Q000473:pathology; D002478:Cells, Cultured; D041321:Chromosomes, Human, X / Q000235:genetics; D041322:Chromosomes, Human, Y / Q000235:genetics; D005260:Female; D019337:Hematologic Neoplasms / Q000628:therapy; D018380:Hematopoietic Stem Cell Transplantation; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D017493:Leukocyte Common Antigens / Q000032:analysis; D018950:Lipopolysaccharide Receptors / Q000032:analysis; D008297:Male; D059630:Mesenchymal Stem Cells / Q000473:pathology*; D008875:Middle Aged; D036102:Peripheral Blood Stem Cell Transplantation; D019172:Transplantation Conditioning; D014184:Transplantation, Homologous
chemical_list: D018950:Lipopolysaccharide Receptors; D017493:Leukocyte Common Antigens