In vivo imaging of BM-DCs. In vivo imaging of Luc⁺ DC homing over time in FVB mice (A) and NOD mice (B) after intravenous injection, and in FVB mice after intraperitoneal injection (C). Scale represents the number of photons per second/per cm². (D) Annotation on the source of lights from Luc⁺ DCs after intravenous injection. (E) Quantitation of the signal emitted from Luc⁺ DCs in the spleen area (as delimited in panel D; mean ± SE, n value shown above each bar) after intravenous injection in FVB and NOD mice. Mice were imaged for 5 minutes under anesthesia.