Differential short‐term and long‐term repopulating ability of stem cell subsets in mice

Hematopoietic reconsitution after transplantation requires the presence of cells with early and late repopulating ability. To determine the contribution of relatively immature and mature hematopoietic progenitor cells in engraftment, we used a modified rhodamine staining procedure to purify populati...

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Published in:Stem cells (Dayton, Ohio) Ohio), 1997-01, Vol.15 (S2), p.47-53
Main Authors: Fibbe, Willem E., Zijlmans, J. Mark J. M., Willemze, Roel
Format: Article
Language:English
Subjects:
Animals
ATP-Binding Cassette, Sub-Family B, Member 1 - analysis
Colony-Stimulating Factors - pharmacology
Female
Fluorescent Dyes
Hematopoiesis - physiology
Hematopoietic Stem Cell Transplantation
Hematopoietic Stem Cells - chemistry
Hematopoietic Stem Cells - physiology
Male
Marrow repopulating ability
Mice
Mice, Inbred BALB C
Radiation Tolerance
Radioprotection
Rhodamine 123
Rhodamines
Stem cell mobilization
Stem cell transplantation
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Summary:Hematopoietic reconsitution after transplantation requires the presence of cells with early and late repopulating ability. To determine the contribution of relatively immature and mature hematopoietic progenitor cells in engraftment, we used a modified rhodamine staining procedure to purify populations of rhodamine 123 (Rho)bright, Rhodull and Rho− cells from mouse steady‐state bone marrow. Following transplantation of these subsets of stem cells in lethally irradiated mice, marrow repopulating cells were mainly present in the small fraction of Rho− cells, indicating that hematopoietic stem cells have a relatively high expression of P‐glycoprotein. Similar cell populations could be purified from cytokine‐mobilized blood following treatment with cyclophosphamide and G‐CSF. The Rho−cell population contained the majority of hematopoietic stem cells with in vivo marrow repopulating ability. In methylcellulose colony assays, the majority of the committed progenitor cells were present in Rhodull and Rhobright fractions. These results indicate that relatively primitive populations of hematopoietic stem cells that lack colony‐forming capacity in vitro mediate the early phase of engraftment following syngeneic stem cell transplantation. Stem Cells 1997; 15(suppl 1): 47–53
ISSN:1066-5099
1549-4918
DOI:10.1002/stem.5530150808