Journal: Oncotarget
Article Title: Efficient delivery of small interfering RNAs targeting particular mRNAs into pancreatic cancer cells inhibits invasiveness and metastasis of pancreatic tumors
doi: 10.18632/oncotarget.26880
Figure Lengend Snippet: ( A ) Ex vivo images of the PDAC tumors excised from the S2-013 tumor-bearing mice after intravenous injection of Alexa 647-labeled scrambled control siRNA-FA-PEG-COL nanoparticles (Scr), Alexa 647-labeled CCDC88A siRNA-FA-PEG-COL nanoparticles (siCCDC88A), and Alexa 647-labeled WASF2 siRNA-FA-PEG-COL nanoparticles (siWASF2) via the tail vein. The peritoneal dissemination nodule and mouse heart were excised from the S2-013 tumor-bearing mice after intravenous injection of Alexa 647-labeled scrambled control siRNA-FA-PEG-COL nanoparticles. Fluorescence intensity of the Alexa 647-labeled nanoparticles was measured 24 h after intravenous injection to the mouse model. ( B ) The S2-013 tumor-bearing mice were fixed by perfusion 24 h after intravenous injection of Alexa 647-labeled scrambled control siRNA-FA-PEG-COL nanoparticles (Scr) or Alexa 647-labeled target siRNA-FA-PEG-COL nanoparticles against CCDC88A (siCCDC88A) and WASF2 (siWASF2) via the tail vein. Frozen sections of S2-013-derived PDAC tumor tissues were immunocytochemically stained with antibodies corresponding to the target siRNAs (green). Nanoparticles were indicated by red. Representative confocal immunofluorescence microscopic images are shown. Arrows, tumor cells showing suppression of the target proteins by the siRNA-FA-PEG-COL nanoparticles. Arrows, the target siRNA-FA-PEG-COL nanoparticle transfected tumor cells that suppress CCDC88A or WASF2. Arrowheads, the scrambled control siRNA-FA-PEG-COL nanoparticle transfected tumor cells that express CCDC88A and WASF2. Blue, DAPI staining. Scale bars, 10 μm.
Article Snippet: The human PDAC cell line S2-013, which is a subline of SUIT-2, the human PDAC cell line PANC-1, and HPNE immortalized normal pancreatic epithelial cells were maintained in Dulbecco’s modified Eagle’s medium (Gibco-BRL, Carlsbad, CA, USA) containing 10% fetal calf serum as published previously [ ].
Techniques: Ex Vivo, Injection, Labeling, Control, Fluorescence, Derivative Assay, Staining, Immunofluorescence, Transfection