Inhibited Metastasis and Amplified Chemotherapeutic Effects by Epigene-Transfection Based on a Tumor-Targeting Nanoparticle
Received 29 January 2020
Accepted for publication 25 May 2020
Published 23 June 2020 Volume 2020:15 Pages 4483—4500
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 2
Editor who approved publication: Dr Mian Wang
Mengzhu Wang,1 Zhigang Wang,1 Bin Qiao,1 Jin Cao,1 Luya Quan,1 Yuanli Luo,1 Hanwen Qi,2 Xiaowen Zhong,1 Yubei He,1 Xianquan Zhang,1,3 Lan Hao1
1Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, People’s Republic of China; 2The A. Gary Anderson Graduate School of Management, University of California, Riverside, Riverside, CA, 92521, USA; 3Cardiothoracic Surgery Department, Chongqing Hygeia Cancer Hospital, Chongqing, 401331, People’s Republic of China
Correspondence: Lan Hao
Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, 1# Yixueyuan Road, Yuzhong District, Chongqing, People’s Republic of China
Tel +86 15823291038
Chongqing Hygeia Cancer Hospital, No. 222, Sixian Road, University Town, Shapingba District, Chongqing 401331, People’s Republic of China
Tel +86 13996286125
Purpose: Tumor metastasis and drug resistance have always been vital aspects to cancer mortality and prognosis. To compromise metastasis and drug resistance, a nanoparticle IPPD-PHF2 (IR780/PLGA-PEI(Dox)-PHF2) has been engineered to accomplish efficient targeted epigenotherapy forced by PHF2-induced MET (mesenchymal to epithelial transition).
Materials and Methods: IPPD-PHF2 nanoparticle was synthesized and characterized by several analytical techniques. The transfection efficiency of IPP-PHF2 (IR780/PLGA-PEI-PHF2) was compared with PP-PHF2 (PLGA-PEI-PHF2) in vitro by WB and in vivo by IHC, and the cytotoxicity of IPP was compared with Lipo2000 in vitro by CCK8 assay. The inhibition of cancer cell migration caused by PHF2-upregulation was tested by wound healing assay, and the enhanced chemotherapeutic sensitivity was detected by flow cytometry. Tumor-targeting property of IPPD-PHF2 was proved by fluorescent imaging in vivo with MDA-MB-231 tumor-bearing nude mice. Except for fluorescent imaging ability, considerable photoacoustic signals of IPPD-PHF2 at tumor sites were verified. The anti-tumor activity of IPPD-PHF2 was investigated using in vivo human breast cancer MDA-MB-231 cell models.
Results: Tumor-targeting nanoparticle IPPD-PHF2 had an average size of about 319.2 nm, a stable zeta potential at about 38 mV. The encapsulation efficiency of doxorubicin was around 39.28%, and the adsorption capacity of plasmids was about 64.804 μg/mg. Significant up-regulation of PHF2 induced MET and caused reduced migration as well as enhanced chemotherapeutic sensitivity. Either IPPD (IR780/PLGA-PEI(Dox)) or IPP-PHF2 (IR780/PLGA-PEI-PHF2) presented minor therapeutic effects, whereas IPPD-PHF2 specifically accumulated within tumors, showed extraordinary transfection efficiency specifically in tumor sites, acted as inhibitors of metastasis and proliferation, and presented good multimodality imaging potentials in vivo.
Conclusion: IPPD-PHF2 NPs is a promising tool to bring epigenotherapy into a more practical era, and the potential application of harm-free multimodality imaging guidance is of great value.
Keywords: targeted epigenotherapy, metastasis, drug resistance, multimodality imaging, breast cancer
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