來源 南京醫科大學附屬淮安第一醫院
化療仍然是目前腫瘤治療的重要手段之一,隨著腫瘤藥物研究的深入,抗腫瘤納米藥物在腫瘤綜合治療中的應用日漸成熟。納米藥物可在提升化療藥物腫瘤分布的同時有效減輕化療毒副作用,成為腫瘤靶向治療的主要策略之一。
近日,南京醫科大學附屬淮安第一醫院中心實驗室腫瘤納米藥物課題組在抗腫瘤納米脂質體藥物研究中取得重要進展。實驗室人員以天然蛋黃中的脂質為基礎製備了可有效遞送化療藥物、核酸製劑等的納米藥物載體(Egg yolk lipid-derived nanovectors, EYLNs)。該載體粒徑約 50 nm,可高效內化腫瘤細胞;因該載體脂質來源天然,不會產生機體毒性。更為重要的是,小鼠腫瘤模型顯示,EYLNs 載體良好的實體瘤的高通透性和滯留效應(EPR 效應)顯著增強了化療藥物(Doxorubicin)在腫瘤組織中的分布,進而實現對小鼠乳腺癌及肝癌的有效抑制作用。同時,主動靶向修飾(如葉酸)可進一步促進納米藥物在腫瘤組織中的分布。
綜上,該天然蛋黃脂質抗腫瘤納米載體不僅毒性小、載藥量高,更為關鍵優勢是具有良好的實體瘤高通透性和滯留效應,具有極大的臨床轉化應用前景。該成果以「Nanovector Assembled from Natural Egg Yolk Lipids for Tumor-Targeted Delivery of Therapeutics」為題發表在 ACS Applied Materials & Interfaces 雜誌上(2020,12,7:7984-7994. 期刊影響因子:8.45,SCI 材料一區)。論文共同第一作者為南京醫科大學附屬淮安第一醫院羅超教授、碩士研究生唐樁、雋雅麗,通訊作者為南京醫科大學附屬淮安第一醫院王其龍教授、高勇教授及張莉教授。
論文信息
【標題】Nanovector Assembled from Natural Egg Yolk Lipids for Tumor-Targeted Delivery of Therapeutics
【作者】Zhuang Tang, Chao Luo, Yali Jun, Mengchu Yao, Mengyan Zhang, Kang He, Luhao Jin, Jianshe Ma, Song Chen, SuAn Sun, Mingyue Tao, Lianshu Ding, Xiaoyang Sun, Xiaofei Chen, Li Zhang*, Yong Gao*, Qi-long Wang*
【期刊】ACS Applied Materials & Interfaces
【日期】19 February 2020
【DOI】10.1021/acsami.9b22293
【連結】
https://pubs.acs.org/doi/full/10.1021/acsami.9b22293
【摘要】Nanomedicine uses nanotechnology-based strategies for precision tumor therapy, including passive and ligand-mediated active tumor targeting by nanocarriers. However, the possible biotoxicity of chemosynthetic nanovectors limits their clinical applications. A novel natural egg yolk lipid nanovector (EYLN) was developed for effective loading and delivery of therapeutic agents. Lipids were extracted from egg yolks and reassembled into nanosized particles. EYLNs』 stability, cellular uptake, toxicity, and delivery capacity for therapeutic agents were evaluated in vitro. The systemic toxicity and biodistribution of EYLNs were analyzed in normal mice, and the therapeutic effects of doxorubicin (Dox)-loaded EYLNs were evaluated in mouse breast cancer and hepatoma models. EYLNs had a particle size of 40 nm and a surface ζ-potential of 45 mV and were effectively internalized by tumor cells, without showing toxicity and side effects in vitro and in vivo. Importantly, their excellent permeability and retention effect significantly enhanced the distribution of EYLNs at tumor sites, and EYLN-Dox effectively inhibited the tumor growth in both mouse models. Targeted modification with folic acid further promoted vector-mediated drug distribution in tumors. This study demonstrates that lipids with specific proportions in the egg yolk can be used to construct natural drug vectors, providing a new strategy for nano-oncology research.