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Docetaxel-loaded solid lipid nanoparticles suppress breast cancer cells growth with reduced myelosuppression toxicity

Authors Yuan Q, Han J, Cong WS, Ge Y, Ma DD, Dai ZX, Li YP, Bi XL

Received 10 July 2014

Accepted for publication 8 August 2014

Published 17 October 2014 Volume 2014:9(1) Pages 4829—4846

DOI https://doi.org/10.2147/IJN.S70919

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Thomas J Webster

Qing Yuan,1 Jing Han,1,2 Wenshu Cong,1 Ying Ge,3 Dandan Ma,1,3,4 Zhaoxia Dai,3,4 Yaping Li,5 Xiaolin Bi1,3,4

1CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 2School of Life Sciences, Anhui University, Hefei, 3Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, 4Graduate School, Dalian Medical University, Dalian, 5Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, People’s Republic of China

Abstract: Docetaxel is an adjuvant chemotherapy drug widely used to treat multiple solid tumors; however, its toxicity and side effects limit its clinical efficacy. Herein, docetaxel-loaded solid lipid nanoparticles (DSNs) were developed to reduce systemic toxicity of docetaxel while still keeping its anticancer activity. To evaluate its anticancer activity and toxicity, and to understand the molecular mechanisms of DSNs, different cellular, molecular, and whole genome transcription analysis approaches were utilized. The DSNs showed lower cytotoxicity compared with the commercial formulation of docetaxel (Taxotere®) and induced more apoptosis at 24 hours after treatment in vitro. DSNs can cause the treated cancer cells to arrest in the G2/M phase in a dose-dependent manner similar to Taxotere. They can also suppress tumor growth very effectively in a mice model with human xenograft breast cancer. Systemic analysis of gene expression profiles by microarray and subsequent verification experiments suggested that both DSNs and Taxotere regulate gene expression and gene function, including DNA replication, DNA damage response, cell proliferation, apoptosis, and cell cycle regulation. Some of these genes expressed differentially at the protein level although their messenger RNA expression level was similar under Taxotere and DSN treatment. Moreover, DSNs improved the main side effect of Taxotere by greatly lowering myelosuppression toxicity to bone marrow cells from mice. Taken together, these results expound the antitumor efficacy and the potential working mechanisms of DSNs in its anticancer activity and toxicity, which provide a theoretical foundation to develop and apply a more efficient docetaxel formulation to treat cancer patients.

Keywords: docetaxel, docetaxel-loaded solid lipid nanoparticles, breast cancer, toxicity

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