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. 2009 Nov 25;4(11):e8035. doi: 10.1371/journal.pone.0008035

Figure 2. Luciferase activity correlates with in vivo stem cell activity.

Figure 2

(A) 1000 mammary epithelial cells of the indicated population were transplanted into mammary fat pads cleared of their endogenous epithelium and subsequent BLI intensity was quantified in individual mice over 12 weeks, normalized to the time of injection. (B) Representative BLI images (left panel) and alum carmine staining of mammary glands (right panel) 12 weeks after transplantation of various mammary epithelial cell populations into cleared fat pads. Luciferase activity was detected solely in mice receiving CD24+CD29hi MaSCs (P4) and not in mice receiving CD24+CD29lo (P5) and CD24 P6 cells (middle and lower panel). Mice with strong luciferase activity showed mammary gland reconstitution, based on alum carmine staining (arrow).