Journal: Nano Convergence
Article Title: Tumor-specific biochemical nanoconversion of self-assembled peptide-conjugated paclitaxel-docetaxel-based nanoparticles
doi: 10.1186/s40580-025-00487-0
Figure Lengend Snippet: In vitro, cathepsin B cleavage, cellular toxicity and fluorescence imaging of (Ac)FRRF-DTX NPs. HPLC analysis of (Ac)FRRF-DTX NPs incubated without ( a ) or with ( b ) enzyme reaction buffer containing cathepsin B for different time points (0–72 h). ( c ) LC-MS analysis of PTXm during the cathepsin B cleavage experiment. ( d ) The assessment of cathepsin B activity levels in HDFa, Hep G2, CT26.wt, and A549 cell lines ( n = 3). ( e ) Evaluation of anticancer efficacy on Hep G2 cells treated with DTX, PTX, PTXm, (Ac)FRRF, (Ac)FRRF-DTX NPs and de-Boc-DTX ( n = 5 − 6). ( f ) Cellular uptake of RITC-PTX and RITC-(Ac)FRRF-DTX NPs in Hep G2 cells (Scale bar = 50 μm). ( g ) Data quantifying the fluorescence intensity over time of (Ac)FRRF-DTX NPs and PTX ( n = 3). ( h ) Fluorescent microscopy imaging observing cell death in Hep G2 cells treated with PTX, PTXm and (Ac)FRRF-DTX NPs (Scale bar = 50 μm). ( i ) Quantification of fluorescence intensity from nucleic acid staining using ImageJ software ( n = 5). ( j ) microtubule binding of PTX, PTXm and (Ac)FRRF-DTX NPs (Scale bar = 50 μm). ( k ) Quantification of fluorescence intensity from Microtubule Cytoskeleton Dye using ImageJ software ( n = 5). ( l ) Confocal images of (Ac)FRRF-DTX NPs (Scale bar = 10 μm). *p < 0.05, **p < 0.01 and ***p < 0.001
Article Snippet: The fluorescence intensity of RITC-(Ac)FRRF-DTX was measured and quantified using a precision fluorescence analyzer (FOBI, CELLGENTEK, Republic of Korea) at various time points after intravenous injection (0, 0.5, 1, 3, 6, 12, 24 and 48 h).
Techniques: In Vitro, Fluorescence, Imaging, Incubation, Liquid Chromatography with Mass Spectroscopy, Activity Assay, Microscopy, Staining, Software, Binding Assay