<p>Preparation, Characterization, and Pharmacokinetic Study of a Novel Long-Acting Targeted Paclitaxel Liposome with Antitumor Activity</p>

• DOI: 10.2147/ijn.s228715
• Publication Date: 2020-01-23T17:24:12Z
• Authors: Bing Han; Yue Yang; Jinglin Chen; Huan Tang; Yuxin Sun; Zheng Zhang; Zeng Wang; Yan Li; Yao Li; Xue Luan; Qianwen Li; Zhihui Ren; Xiaowei Zhou; Dengli Cong; Zhiyi Liu; Qin Meng; Fei Sun; Jin Pei
• Keywords: 0301 basic medicine; Medicine (General); Paclitaxel; Breast Neoplasms; targeted drug delivery; paclitaxel; 03 medical and health sciences; breast cancer; R5-920; Drug Delivery Systems; International Journal of Nanomedicine; Cell Line, Tumor; Toxicity Tests, Acute; Animals; Humans; long-acting liposomes; Original Research; Mice, Inbred BALB C; Mice, Inbred ICR; estrogen receptors; Antineoplastic Agents, Phytogenic; Xenograft Model Antitumor Assays; 3. Good health; Liposomes; MCF-7 Cells; Female; Half-Life

Breast cancer is the leading cause of cancer death in women. Chemotherapy to inhibit the proliferation of cancer cells is considered to be the most important therapeutic strategy. The development of long-circulating PEG and targeting liposomes is a major advance in drug delivery. However, the techniques used in liposome preparation mainly involve conventional liposomes, which have a short half-life, high concentrations in the liver and spleen reticuloendothelial system, and no active targeting.Four kinds of paclitaxel liposomes were prepared and characterized by various analytical techniques. The long-term targeting effect of liposomes was verified by fluorescence detection methods in vivo and in vitro. Pharmacokinetic and acute toxicity tests were conducted in ICR mice to evaluate the safety of different paclitaxel preparations. The antitumor activity of ES-SSL-PTX was investigated in detail using in vitro and in vivo human breast cancer MCF-7 cell models.ER-targeting liposomes had a particle size of 137.93±1.22 nm and an acceptable encapsulation efficiency of 88.07±1.25%. The liposome preparation is best stored at 4°C, and is stable for up to 48 hrs. Cytotoxicity test on MCF-7 cells demonstrated the stronger cytotoxic activity of liposomes in comparison to free paclitaxel. We used the near-infrared fluorescence imaging technique to confirm that ES-SSL-PTX was effectively targeted and could quickly and specifically identify the tumor site. Pharmacokinetics and acute toxicity in vivo experiments were carried out. The results showed that ES-SSL-PTX could significantly prolong the half-life of the drug, increase its circulation time in vivo, improve its bioavailability and reduce its toxicity and side effects. ES-SSL-PTX can significantly improve the pharmacokinetic properties of paclitaxel, avoid allergic reaction of the original solvent, increase antitumor efficacy and reduce drug toxicity and side effects.ES-SSL-PTX has great potential for improving the treatment of breast cancer, thereby improving patient prognosis and quality of life.