Abstract:
:The engraftment of donor bone marrow (BM) cells in nonablated mice is inefficient. Niche availability has been thought to be the reason, and cytoablation with irradiation or cytotoxic agents is routinely used with the belief that this frees the preoccupied niches in recipients. In this study, donor cell redistribution and proliferation in ablated and nonablated mice were compared by implanting donor cells directly into the femur cavity of sedated mice. The redistribution of Lin(-) donor cells into BM was similar between ablated and nonablated mice. Poor engraftment in nonablated mice was shown to be the result of inefficient donor cell proliferation rather than because of a lack of space. Competitive repopulation assays demonstrated that the donor hematopoietic stem cells (HSCs) were present in nonirradiated recipients for at least 6 months after transplantation, but that they did not expand as did their counterparts in lethally irradiated mice. This study suggests that efficient bone marrow transplantation in nonablated recipients may be possible as a result of better understanding of HSC proliferative regulation and appropriate in vitro manipulation.
journal_name
Bloodjournal_title
Bloodauthors
Zhong JF,Zhan Y,Anderson WF,Zhao Ydoi
10.1182/blood-2002-04-1256subject
Has Abstractpub_date
2002-11-15 00:00:00pages
3521-6issue
10eissn
0006-4971issn
1528-0020pii
2002-04-1256journal_volume
100pub_type
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