Interleukin-1 administration before lethal irradiation and allogeneic bone marrow transplantation: Early transient increase of peripheral granulocytes and successful engraftment with accelerated leukocyte, erythrocyte, and platelet recovery

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Abstract

Administration of interleukin-1 beta (IL-1β) before a lethal irradiation with or without allogeneic bone marrow transplantation (BMT) protects greater than 90% of the irradiated mice. To approach the mechanisms responsible for the radioprotective effect of IL-1, we examined the effects of IL-1 pretreatrnent on engraftment and kinetics of peripheral blood, spleen, and marrow cell reconstitution after irradiation and BMT. Although the BMT was not necessary for the survival of the IL-1-pretreated lethally irradiated mice, allogeneic marrow did engraft in these mice as evaluated in the spleen and marrow 2 months after BMT. IL-1 pretreatrnent significantly accelerated hematopoietic recovery versus transplanted saline-treated controls with a pronounced enhancement of peripheral leukocyte, platelet, and erythrocyte recovery. Leukocyte recovery in IL-1-pretreated mice was unique in that IL-1 first induced an early transient (maximum at day 7) increase of peripheral granulocytes before accelerating leukocyte recovery after day 11. IL-1 pretreatment also significantly enhanced marrow cell recovery after allogeneic BMT with an eightfold increase in marrow cellularity from day 4 to 11 versus control transplanted mice. When lethal irradiation was not followed by allogeneic BMT, IL-1 pretreatment also affected the peripheral reconstitution of leukocytes, platelets, and erythrocytes. Interestingly, in the absence of BMT, IL-1 also induced an early circulation of peripheral granulocytes. Overall, our data demonstrate that a single administration of IL-1 before lethal irradiation and allogeneic BMT can induce an early transient increase of circulating granulocytes, followed by an accelerated multilineage recovery and long-term allogeneic engraftment. © 1993 by The American Society of Hematology.

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Tiberghien, P., Laithier, V., Mabed, M., Racadot, E., Reynolds, C. W., Angonin, R., … Hervé, P. (1993). Interleukin-1 administration before lethal irradiation and allogeneic bone marrow transplantation: Early transient increase of peripheral granulocytes and successful engraftment with accelerated leukocyte, erythrocyte, and platelet recovery. Blood, 81(7), 1933–1939. https://doi.org/10.1182/blood.v81.7.1933.bloodjournal8171933

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