Bone marrow transplantation was performed as described previous.60 (link) In brief, WT mice at 6 weeks of age underwent whole-body gamma irradiation with 137Cs using a Gammacell 40 irradiator (MDS Nordion, Ontario, Canada). A lead shield was used to protect the head and eyes from radiation. A dose of 8.5 Gy (850 rads) was used to ablate the marrow. Within 24 h after irradiation, mice received bone marrow transplant from 6-week-old GFP transgenic mice through tail vein as a 200 μl cell suspension containing 0.7–1.0 × 107 cells. 6 weeks later, mice were subjected to IR.
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