The radioprotective action on bone marrow CFU during immobilization of mice
article
Anesthesia and restraint without anesthesia during whole body X irradiation decrease the mortality from both the bone marrow and the intestinal syndromes (30 and 5 day mortality). The two types of immobilization decrease the radiosensitivity of the hemopoietic stem cells, as shown by an increased survival of hemopoietic stem cells in the marrow of immobilized mice. The hypoxic cell radiosensitizer Ro-07-0582 reversed the radioprotective effect during restraint without anesthesia, but not during pentobarbital anesthesia. This indicates that hypoxia of the femur bone marrow cannot explain the decreased radiosensitivity of the stem cells during pentobarbital anesthesia. Pentobarbital was also shown to inhibit the recruitment of resting femur bone marrow stem cells (G0-phase cells) into cycle following a sublethal dose of X-rays The relevance of these observations is discussed.
Chemicals/CAS: fentanyl, 437-38-7; fluanisone, 1480-19-9; misonidazole, 13551-87-6; pentobarbital, 57-33-0, 76-74-4; Butyrophenones; Cesium Radioisotopes; Fentanyl, 437-38-7; Pentobarbital, 76-74-4
Chemicals/CAS: fentanyl, 437-38-7; fluanisone, 1480-19-9; misonidazole, 13551-87-6; pentobarbital, 57-33-0, 76-74-4; Butyrophenones; Cesium Radioisotopes; Fentanyl, 437-38-7; Pentobarbital, 76-74-4
Topics
fentanylfluanisonemisonidazolepentobarbitalanesthesiabone marrowcolony forming unitepidemiologyhematopoietic cellhypoxiaimmobilizationintraperitoneal drug administrationmortalitymouseradiation protectionradiosensitivityradiotherapyrestrainttheoretical studyAnesthesia, GeneralAnimalButyrophenonesCell SurvivalCesium RadioisotopesDose-Response Relationship, RadiationFemaleFentanylGamma RaysHematopoietic Stem CellsImmobilizationMicePentobarbitalRadiation EffectsX-Rays
TNO Identifier
228016
ISSN
00337587
Source
Radiation Research, 66(2), pp. 326-336.
Pages
326-336
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