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. 2019 Nov 1;14:8543–8560. doi: 10.2147/IJN.S219820

Figure 1.

Figure 1

Characterization of nanoparticles and the iRGD peptide.

Notes: (A) Nanoparticles exhibited opalescence and Tyndall effect compared to that observed for deionized water. (B) PLGA-PTX exhibited an average particle size of 147.5±9.5 nm with a narrow size distribution (PDI<0.1). (C) Nanoparticles were spherical in shape and possessed smooth surfaces as shown in the transmission electron microscopy image (scale bar = 200 nm). (D) Changes in PLGA-PTX particle size at different storage times in PBS and PVA at 4°C. (E) PLGA-PTX exhibited a sustained release in pH 6.4 and pH 7.4 PBS containing 0.1% Tween-80. (F) The disulfide bond of iRGD was determined in the absence (non-reducing) or presence (reducing) of DTT by mass spectrometry.

Abbreviations: PLGA, poly lactic-co-glycolic acid; PTX, paclitaxel; PLGA-PTX, paclitaxel-loaded PLGA; PDI, polydispersity index; PBS, phosphate buffer saline. DTT, dithiothreitol.