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Polymers in the Co-delivery of siRNA and Anticancer Drugs for the Treatment of Drug-resistant Cancers

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Abstract

Recently, co-delivery of siRNA and anticancer drugs has drawn much attention in the treatment of drug-resistant cancers. Drug resistance is exhibited by cancer cells, which limits the efficacy of chemotherapy. When siRNA and anticancer drugs are delivered into cancer cells simultaneously, the siRNA is expected to silence the genes related to drug resistance, decreasing the drug efflux pumps and activating the cell’s apoptosis pathways. In a timeframe following the release of siRNA, the accumulation of the co-delivered anti-cancer drug inside of the cancer cells will increase, resulting in promoted chemotherapeutic effects. Several classes of nanocarriers have been designed based on polymers for co-delivery, including surface-modified polymer nanoparticles (NPs), polymer micelles, dendrimers, polymer nanocapsules, polymer-modified liposomes, and polymer-modified silica and gold NPs. Compared with separate delivery, co-delivery showed significant advantages in the treatment of drug-resistant cancers. This review focuses on polymers in the co-delivery of siRNA and anticancer drugs, and summarizes key advances in the recent several years.

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Fig. 1
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Adapted with permission [63]. Copyright 2015, Elsevier

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Adapted with permission [65]. Copyright 2015, Elsevier

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Adapted with permission [76]. Copyright 2013, Elsevier

Fig. 5

Adapted with permission [86]. Copyright 2016, American Chemical Society

Fig. 6

Adapted with permission [87]. Copyright 2013, Royal Society of Chemistry

Fig. 7

Adapted with permission [88]. Copyright 2015, American Chemical Society

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Adapted with permission [100]. Copyright 2014, Elsevier

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Adapted with permission [109]. Copyright 2016, Nature Publishing Group

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Abbreviations

ABC:

ATP-binding cassette

Bcl-2:

B-cell lymphoma 2

BCRP:

Breast cancer resistance protein

CPLA:

Cationic polylactide

CPT:

Camptothecin

CS:

Chitosan

CSC:

Cancer stem cell

CyD:

Cyclodextrin

DDAB:

Dimethyldioctadecyl ammonium bromide

DEA:

Diethyldiamine

DOC:

Docetaxel

DOPE:

1,2-Dioleoyl-sn-glycero-3-phosphoethanolamine

DOX:

Doxorubicin

DSPE:

1,2-Distearoyl-sn-glycero-3-phosphoethanolamine

DTT:

14-Dithiothreitol

EpCAM:

Epithelial cell adhesion molecule

FA:

Folic acid

Fol:

Folate

Gem:

Gemcitabine

HepG2:

Hepatic G2 cells

HIF1 α:

Hypoxia-inducible factor 1α

HNP:

Hybrid nanoparticle

HPG:

Hyperbranched polyglycerol

HZ:

Hydrazone

LDL:

Low-density lipoprotein

LENP:

Lipid/ε-polylysine-coated nanoparticle

LND:

Lonidamine

LNP:

Lipid nanoparticle

MDR:

Multidrug resistance

MNP:

Magnetic nanoparticle

MRP1:

MDR-associated protein 1

N/P:

Nitrogenphosphate

NP:

Nanoparticle

NCP:

Nanoscale coordination polymer

NIR:

Near-infrared

NSC:

N-succinyl chitosan

OCN:

One-component nanomedicine

PAA:

Poly(acrylic acid)

PAMAM:

Poly(amidoamine)

PBLA:

Poly(β-benzyl l-aspartate)

PCB:

Polycarboxybetaine

PCL:

Polycaprolactone

PDHA:

Poly(dihydroxy acetone)

PDMA:

Poly(dimethyl acrylamide)

PDMAEMA:

Poly(dimethylaminoethyl methacrylate)

PDPA:

Poly[(2-diisopropylamino)ethyl methacrylate]

PE:

Polyethylene

PEG or PEO:

Poly(ethylene glycol)

PEI:

Polyethyleneimine

PGAH:

Poly(l-glutamic acid γ-hydrazide)

P-gp:

P-glycoprotein

PHD:

PEI-HZ-DOX

PKB:

Protein kinase B

PLGA:

Poly(lactic-co-glycolic acid)

PLL:

Poly-l-lysine

PLLD:

Poly(l-lysine) dendrimer

PLLeu:

Poly-l-leucine

PNC:

Polymer nanocapsules

PPF:

PEI-PEG-Folate

PTX:

Paclitaxel

RNAi:

RNA interference

siRNA:

Short interfering RNA

SSNP:

Supramolecular self-assembled NP

TEA:

Triethanolamine

TNF-α:

Tumor necrosis factor-α

VEGF:

Vascular endothelial growth factor

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Acknowledgements

The authors thank the US National Science Foundation for financial support (DMR-1206715, DMR-1609914). The authors also acknowledge the collaborations with all the coworkers.

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Correspondence to Chong Cheng.

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This article is part of the Topical Collection “Polymeric Gene Delivery Systems”; edited by Yiyun Cheng.

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Sun, H., Yarovoy, I., Capeling, M. et al. Polymers in the Co-delivery of siRNA and Anticancer Drugs for the Treatment of Drug-resistant Cancers. Top Curr Chem (Z) 375, 24 (2017). https://doi.org/10.1007/s41061-017-0113-z

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