FIG. 1.

Impaired homing following exposure to ionizing radiation (IR) is time dependent. (A) Schematic of the experimental procedure. Mice were irradiated or not at the dose of 8 Gy and left untreated for 2 or 5 days after which homing was determined. (B) Absolute number of PKH26⁺ bone marrow cells present in the femurs of mice at 2 and 5 days post their exposure (+) or not (−) to IR. (C) Same as in B except that the number of PKH26⁺ bone marrow cells is expressed in proportion to the number of nucleated cell present in the femur at the time of sacrifice. n=6–20, each symbol representing an individual mouse. Student t tests *P<0.05 are shown.