Long-Term Effect of Whole-Body X-Irradiation on Cell-Mediated Immune Reaction in Mice

Age-related change in immunological activity was examined at 10 to 91 weeks following whole-body irradiation by determining the specific anti-tumor cell-mediated immunity in host mice induced and/or enhanced by local irradiation to transplanted tumor. Median survival time of the non-irradiated C3H/H...

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Bibliographic Details
Published in:JOURNAL OF RADIATION RESEARCH 1989, Vol.30 (3), p.226-237
Main Authors: Norimura, T, Tsuchiya, T
Format: Article
Language:English
Subjects:
Aging - immunology
Animals
Female
Immunity, Cellular - radiation effects
Mice
Mice, Inbred C3H
Neoplasm Transplantation
Neoplasms, Experimental - immunology
Time Factors
Whole-Body Irradiation
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Summary:Age-related change in immunological activity was examined at 10 to 91 weeks following whole-body irradiation by determining the specific anti-tumor cell-mediated immunity in host mice induced and/or enhanced by local irradiation to transplanted tumor. Median survival time of the non-irradiated C3H/He female mice was 98.6 weeks while the median life-span of the mice exposed to two and four Gy of 250kVp X-rays at the age of 10-12 weeks was shortened by 14.9 and 23.4 weeks, respectively. The rate of tumor reduction within two weeks after local irradiation to tumor and the growth inhibitory activity of spleen cells from tumor irradiated mice were reduced in a dose-dependent manner when assessed 10 weeks after whole-body irradiation, but recovered to the near-complete level of the non-irradiated controls within a few months, then gradually decreased with normal aging. These results suggest that the age-dependent decline of this immunological activity appears earlier in the irradiated mice as a result of whole-body X-irradiation at a young age, suggesting accelerated aging of the immune system.
ISSN:0449-3060
1349-9157
DOI:10.1269/jrr.30.226