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- Title
Biodegradable nanocarriers for small interfering ribonucleic acid (siRNA) co-delivery strategy increase the chemosensitivity of pancreatic cancer cells to gemcitabine.
- Authors
Yang, Chengbin; Chan, Kok; Lin, Wen-Jen; Soehartono, Alana; Lin, Guimiao; Toh, Huiting; Yoon, Ho; Chen, Chih-Kuang; Yong, Ken-Tye
- Abstract
Ribonucleic acid (RNA) interference (RNAi) therapies are promising cancer treatment modalities that can specifically target abnormal proto-oncogenes, thus improving the therapeutic effect. For the treatment of pancreatic cancer, targeting one mutant proto-oncogene by RNAi usually does not yield the desired therapeutic efficiency. Both K-ras gene mutations and Notch1 overexpression are common symptoms in pancreatic cancer patients, and play a crucial role in pancreatic cancer cell drug resistance. In this study, biodegradable charged polyester-based vectors (BCPVs) were synthesized for the co-delivery of K-ras and Notch1 small interfering ribonucleic acid (siRNA) into MiaPaCa-2 cells (pancreatic cancer cell line) to overcome drug resistance to gemcitabine (GEM), a first-line chemotherapeutic drug used in the clinic. BCPVs could effectively absorb negative siRNA to form a capsule-like structure, prevent siRNA from nuclease digestion in the serum, and promote effective siRNA cell internalization and endosomal escape. Through K-ras and Notch1 gene silencing in MiaPaCa-2 cells, BCPV-siRNA-siRNA nanocomplexes effectively reversed the epithelia-mesenchymal transition (EMT) in MiaPaCa-2 cells, thereby greatly enhancing the sensitivity of MiaPaCa-2 cells to GEM. MiaPaCa-2 cell proliferation, migration, and invasion were effectively inhibited, and cell apoptosis was also significantly enhanced by the synergistic antitumor effect of BCPV-siRNA-siRNA nanocomplexes and GEM. These results suggest that this combination RNAi therapy can be used to improve cancer cell sensitivity to chemotherapeutic drugs. Specifically, this newly developed strategy has a great potential for treating pancreatic cancer.
- Publication
Nano Research, 2017, Vol 10, Issue 9, p3049
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-017-1521-7