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Tumor uptake of siRNA in different formulations. (a) Fluorescence signal of cy3-labeled siRNA in HT-1080 tumor observed by confocal microscopy. (b) Tissue distribution of FITC-siRNA in different formulations. Data = mean ± SD, n = 3. *P < 0.05 compared with free siRNA. ARA: LPD-PEG-ARA; c-myc: c-myc siRNA; Control: control siRNA; NGR: LPD-PEG-NGR.
