Abstract
This study was designed to compare two different modalities of TBI which are currently used in clinical practice. The same dose of 750 cGy was given to CBA mice either in a single dose at a low dose rate (4 cGy min-1) (STBI) or in a fractionated regimen (six fractions of 125 cGy three times a day) at a higher dose rate (25 cGy min-1) (FTBI). After TBI completion we simultaneously studied the in vivo radiation response of bone marrow cells, two murine bone marrow clonogenic cells (CFU-S and GM-CFC) and peripheral blood lymphocytes and granulocytes for a period of 1 month. The percentage of spleen erythrocytic and granulocytic colonies was also determined. No significant differences were observed between the two groups in the first 48 hours after irradiation except in bone marrow cell numbers, probably due to differences in the overall treatment time between the two TBI schedules. After the first 48 hours the repopulation patterns of the different cells were very similar in both groups. These findings suggest that the different dose rates and fractionation used in this study caused similar radiation damage to the murine haemopoietic system. Moreover, no significant repopulation occurred during the longer overall treatment time of the fractionated regimen. These preliminary results must be corroborated with a larger range of doses before any firm conclusion can be drawn.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 24 print issues and online access
$259.00 per year
only $10.79 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Girinski, T., Socie, G., Cosset, J. et al. Similar effects on murine haemopoietic compartment of low dose rate single dose and high dose rate fractionated total body irradiation. Preliminary results after a unique dose of 750 cGy. Br J Cancer 61, 797–800 (1990). https://doi.org/10.1038/bjc.1990.180
Issue Date:
DOI: https://doi.org/10.1038/bjc.1990.180