PMID: 6968725Apr 1, 1980Paper

The effect of low exposure-rate gamma irradiation on T and B lymphocyte function in the mouse

International Journal of Radiation Biology and Related Studies in Physics, Chemistry, and Medicine
C E McDermott, N Gengozian

Abstract

The effect of chronic irradiation on T and B cell numbers and function was studied in mice. Cobalt 60 gamma radiation at 6 R/hour reduced the numbers of anti-SRBC PFC in the spleen, with minimal levels recorded after total exposures of 1000-2000 R. Recovery was incomplete after 1000 R, reaching only 40-50 per cent of normal in four months and remaining at that level for the animal's lifetime. The long-term deficiency in PFC formation was not due to a quantitative lack of T or B cells since normal cell numbers were observed in the spleen 60-144 days after 1000 R. Adoptive transfer studies with combinations of bone marrow and thymus cells, or of splenic T and B cells, from normal and irradiated mice, revealed functional defects in both cell compartments during the first two months. Normal and near normal function of T and B cells occurred 100 days postirradiation, a time when the splenic in vivo response was still only 50 per cent of the controls. The latter observation suggests that the microenvironment of the chronically irradiated spleen alters factors regulating T and B cell interactions in response to a T-dependent antigen.

References

May 1, 1975·Cellular Immunology·P A Campbell, H R Cooper
Mar 1, 1974·European Journal of Immunology·R E AndersonJ F Miller
Feb 1, 1968·Proceedings of the Society for Experimental Biology and Medicine·H N ClamanJ C Selner
Apr 1, 1971·Proceedings of the National Academy of Sciences of the United States of America·J Kettman, R W Dutton
Mar 1, 1972·The Journal of Experimental Medicine·R E AndersonJ F Miller
Mar 31, 1964·Annals of the New York Academy of Sciences·J E TILL, E A MCCULLOCH
Apr 26, 1963·Science·N K Jerne, A A Nordin

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