Figure 5.

Imaging of tumors derived from a single cell derived clone of P6C. (A) DsRed labeled P6C-OPG cells were sorted using FACS. P6C-OPG cells were transfected with the DsRed construct and analysed by FACS. The GFP/DsRed double positive cells were separated out for propagation in culture dishes. (B) GFP/DsRed double positive clones. The DsRed was stably expressed in a single cell derived from a P6C-OPG clone. Scale bars, 200 μm. (C) Xenograft tumors initiated from the DsRed labeled P6C-OPG holoclones in nude mice. Tumors were detected by whole body fluorescent imaging (in-vivo FX PRO, Carestream) and were shown by relative fluorescence intensity at d 0 and 30. (D) Immunohistochemistry of xenograft tumors. Tumors were fixed in paraffin, and CD44 and GFP antibodies were used to detect CD44 and Oct3/4 expression. Scale bars, 200 μm.