At 4 h and 1, 3, 4 and 7 days after WBI, mice were humanely euthanized for whole blood, serum and tissue collection as described in previous reports [18 (
link)]. The mice were deeply anesthetized prior to collecting whole blood through a cardiac blood draw and confirmatory cervical dislocation was performed while the animal was still anesthetized in accordance with the approved IACUC protocol. The blood was immediately divided into two tubes. The samples in EDTA tubes were used for peripheral blood cell counts by a clinical hematology analyzer (
Bayer Advia 120, Bayer, Tarrytown, NY) at the AFRRI Veterinary Sciences Department facility, and samples in BD Microtainer Gold tubes were left unmoved on racks. Following 30 min coagulation at room temperature, sera were well separated from the gel by 10 min-centrifugation at 10,000×
g, collected and stored at −80 °C for later study. After blood collection and euthanasia were completed for an individual mouse, tissues were collected. BM cells were collected from mouse femurs and humeri. After erythrocytes were lysed with
lysis buffer (Qiagen GmbH, Hilden, Germany), total BM myeloid cells were collected for further use. Mouse spleens were excised, rinsed with phosphate buffered saline (PBS), and snap-frozen in liquid nitrogen, then stored at −80 °C for further use.
Li X.H., Ha C.T, & Xiao M. (2016). MicroRNA-30 inhibits antiapoptotic factor Mcl-1 in mouse and human hematopoietic cells after radiation exposure. Apoptosis, 21, 708-720.