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Altered natural killer cell biology in C57BL/6 mice after leukemogenic split-dose irradiation. [/sup 137/Cs]

Journal Article · · J. Immunol.; (United States)
OSTI ID:6792678
Natural killer (NK) cell activity was examined in the spleens of C57BL/6 mice given leukemogenic split-dose irradiation. The radiation protocol resulted in severe depression of spontaneous NK cell activity; this activity was not fully restored after treatment with the interferon inducer poly I:C. In vitro mixing studies provided no evidence for active suppression in vivo as a mechanism for this decrease in activity. In addition, spontaneous activity was restored towards control levels after bone marrow transfusion from nonirradiated mice. The results are most compatible with the radiation-induced loss of a cell with normal NK activity from spleen and bone marrow after the split-dose radiation protocol. In addition, a population of cells able to competitively block normal NK cell lysis of YAC-1 tumor cells is found in the bone marrow, spleen, and thymus of the irradiated mice lacking NK cell activity.
Research Organization:
Tufts Univ. School of Medicine, Boston, MA
OSTI ID:
6792678
Journal Information:
J. Immunol.; (United States), Journal Name: J. Immunol.; (United States) Vol. 126:4; ISSN JOIMA
Country of Publication:
United States
Language:
English

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