Radiobiological properties of human hematopoietic and stromal marrow cells
- 2 January 1989
- journal article
- review article
- Published by Oxford University Press (OUP) in The International Journal of Cell Cloning
- Vol. 7 (4), 203-212
- https://doi.org/10.1002/stem.5530070402
Abstract
Effective hematopoiesis requires the presence of normal hematopoietic progenitors and a supporting microenvironment. Impairment of one of these marrow compartments will result in marrow failure. Total body irradiation (TBI) followed by bone marrow transplantation (BMT) is becoming an established modality in the treatment of malignant hematopoietic disorders. The objectives of irradiation are to ablate host marrow and immunocompetent cells as well as to eradicate neoplastic cells. Although leukemic cells are thought to have the same radiobiological characteristics as their normal counterparts, it has been proposed recently that some leukemic cells may possess a substantial capacity to repair sublethal radiation damage. Thus, radiation administered at different dose rates or fractions might differ in its ability to ablate malignant cells and consequently affect the relapse rate in the post‐transplant period. Different modes of irradiation can also affect the proliferative capacity and the hematopoietic supportive function of the marrow microenvironment. Bone marrow ablation must be accomplished with the least possible damage to other tissues. Impairment of the proliferative capacity of the marrow microenvironment or its hematopoietic supportive function can result in graft failure in the post‐transplant period. In this review, we discuss the radiobiological characteristics of normal hematopoietic, leukemic and stromal cells and their relevance to bone marrow transplantation.Keywords
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