Origin of hematopoietic progenitor cells after bone marrow transplantation: analysis by means of a Y-chromosome specific DNA probe.
To characterize hematopoietic cells in mixed hematopoietic chimeras after allogeneic bone marrow transplantation (BMT), the authors examined the origin of progenies derived from hematopoietic progenitor cells of male recipients who received a marrow graft from female donors, by use of a Y-chromosome specific DNA (YDNA) probe in combination with an in vitro colony assay. Host-type hematopoietic cells were detected in cultured bone marrow mononuclear cells (BMMC) from 4 out of 6 patients studied, who were all in complete remission. In 2 patients of the mixed chimeras, the relative amount of host-derived YDNA from BMMC increased after methylcellulose cultures for 14 days. Analysis of individual colonies derived from granulocyte-macrophage colony forming units (CFU-GM) from these mixed chimeras, including 2 patients with chronic myelogenous leukemia (CML), revealed approximately 30% of total colonies were host-type, although no evidence for the existence of residual Ph1 positive cells was obtained by using polymerase chain reaction for detecting bcr-abl chimeric messenger RNA in the 2 CML patients. These findings provide direct evidence that considerable numbers of host-derived normal hematopoietic progenitors survive and persist for a long term in a certain population of marrow recipients, after BMT following supralethal radiochemotherapy.
Nakatsumi
T
T
Third Department of Medicine, Kanazawa University School of Medicine, Japan.
Nakao
S
S
Ohtaguro
M
M
Chujo
T
T
Tsuchiya
H
H
Niki
T
T
Shiobara
S
S
Mori
T
T
Nagai
K
K
Matsuda
T
T
D016026:Bone Marrow Transplantation; D002678:Chimera / Q000235:genetics; D002999:Clone Cells; D003114:Colony-Forming Units Assay; D015342:DNA Probes; D006801:Humans; D007938:Leukemia / Q000473:pathology; D012333:RNA, Messenger / Q000032:analysis; D013234:Stem Cells / Q000502:physiology*; D014998:Y Chromosome
D015342:DNA Probes; D012333:RNA, Messenger