Long-term residual radiation effect in the murine hematopoietic stem cell compartment

Journal Article · Tue Jan 01 00:00:00 EST 1985 · Ann. N.Y. Acad. Sci.; (United States)

DOI:https://doi.org/10.1111/j.1749-6632.1985.tb20829.x· OSTI ID:5675268

Wangenheim, K H; Peterson, H P; Huebner, G E.F.; Feinendegen, L E

For the measurement of long-term residual radiation effect in the murine hematopoietic system a test system was developed that quantifies the proliferation ability of progeny of spleen repopulating cells by the proliferation factor (PF). The PF expresses the ratios of 125IUdR incorporation in the recipient spleens at days 3 and 5 following cell transfusion, thus measuring the relative increase in number of proliferating cells. Following 500 rad whole-body gamma irradiation, PF recovered up to 6 months and remained thereafter, on the average, at 80% of control. Recovery of the number of 7-day CFU-S was similar to recovery of PF. Various studies were aimed at elucidating the reasons for reduction in PF. Loss of incorporated 125IUdR activity from spleens between days 3 and 5 after cell transfusion indicates loss of mature labeled cells. When the doubling time of proliferating cells of CFU-S progeny (td) is corrected for cell loss, td for control bone marrow approaches mitotic cycle time in normal bone marrow as was found elsewhere. Following 500 rad, both cell loss and td were initially increased and recovered in parallel with PF and number of CFU-S. Reduction of PF could be brought about by radiation-induced increase in transient CFU-S with the consequence of increased loss of mature cells between days 3 and 5. This possibility was excluded by the observation that 1 year after 500 rad the number of colonies per spleen did not decrease from day 7 to day 12 after cell transfusion, as was expected from a higher proportion of transient CFU-S, but increased more than in the controls. Measurement of these 12-day colonies showed a significantly reduced size. Average progeny from irradiated CFU-S, apparently, grow more slowly.

• OSTI ID: 5675268
• Journal Information: Ann. N.Y. Acad. Sci.; (United States), Journal Name: Ann. N.Y. Acad. Sci.; (United States)
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
HEMATOPOIETIC SYSTEM
DELAYED RADIATION EFFECTS
BIOLOGICAL RECOVERY
CELL CYCLE
CELL PROLIFERATION
CFU
GAMMA RADIATION
IODINE 125
LABELLED COMPOUNDS
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TRACER TECHNIQUES
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BETA DECAY RADIOISOTOPES
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BIOLOGICAL RADIATION EFFECTS
BODY
DAYS LIVING RADIOISOTOPES
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE RADIOISOTOPES
EXTERNAL IRRADIATION
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INTERMEDIATE MASS NUCLEI
IODINE ISOTOPES
IONIZING RADIATIONS
IRRADIATION
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NUCLEI
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ORGANS
PYRIMIDINES
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RADIATIONS
RADIOISOTOPES
RECOVERY
RIBOSIDES
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560152* - Radiation Effects on Animals- Animals