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Review

Intelligent polymeric micelles for multidrug co-delivery and cancer therapy

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Pages 1476-1487 | Received 22 Jan 2019, Accepted 18 Mar 2019, Published online: 09 May 2019

Figures & data

Table 1. Examples of intelligent polymeric micelles for multidrug co-delivery and cancer therapy.

Figure 1. (a) Passive targeting of PMs. PMs selectively were trapped in the tumour tissue through the incomplete vasculature around tumours and appropriate particle size. On the contrary, the free drug diffuses into the tumour tissue by free diffusion and then spreads from the tumour tissue to the other tissue. (b) Active targeting of PMs. PMs selectively bind to various receptors overexpressing the surface of a cancer cell by modified the corresponding ligand on its surface.

Figure 1. (a) Passive targeting of PMs. PMs selectively were trapped in the tumour tissue through the incomplete vasculature around tumours and appropriate particle size. On the contrary, the free drug diffuses into the tumour tissue by free diffusion and then spreads from the tumour tissue to the other tissue. (b) Active targeting of PMs. PMs selectively bind to various receptors overexpressing the surface of a cancer cell by modified the corresponding ligand on its surface.

Figure 2. Schematic illustrations for intracellular activation and delivery of cisplatin prodrug and siRNA co-loaded pH-responsive micelles. The micelles were degraded inside acidic late endosome/lysosome due to protonation of PDPA segment induction the transition of hydrophobic core from hydrophobic to hydrophilic. Simultaneously, endosome/lysosome rupture releases the Pt(IV)-OC prodrug and siRNA through the “proton sponge effect" and strong haemolytic activity of the micelles.

Figure 2. Schematic illustrations for intracellular activation and delivery of cisplatin prodrug and siRNA co-loaded pH-responsive micelles. The micelles were degraded inside acidic late endosome/lysosome due to protonation of PDPA segment induction the transition of hydrophobic core from hydrophobic to hydrophilic. Simultaneously, endosome/lysosome rupture releases the Pt(IV)-OC prodrug and siRNA through the “proton sponge effect" and strong haemolytic activity of the micelles.