Fig. 3From: Polyethylenimine-based theranostic nanoplatform for glioma-targeting single-photon emission computed tomography imaging and anticancer drug deliveryConfocal microscopic images of C6 cells treated with mPEI-CTX/DOX, mPEI-CTX, free DOX, and PBS for 24 h. The DOX concentration used was 5 μg/mLBack to article page