Fig. 4.
STAT3 shRNA knockdown decreases BTSC sphere growth. (A) Transduction of BTSCs with lentiviruses expressing 2 different shRNA sequences targeted against STAT3 dramatically reduced the levels of STAT3 protein after 6 days compared with nontargeting shRNA or untransduced control BTSCs. (B and C) STAT3 shRNA cultures generated significantly fewer spheres compared with corresponding nontargeting shRNA or untransduced control BTSCs (P < .05, Tukey's multiple comparison test). Abbreviation: n.s., nonsignificant.