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·药学研究·
靶头修饰对PEG-PCL胶束在人宫颈癌细胞内转运行为的影响
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杨金津 ,于清华 ,于凌波 ,张亚东 ,梁冬芹 ,孙钰钰 ,王慧云 ,崔亚男 (1.山东第二医科大学药学院,
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山东 潍坊 261053;2. 济宁医学院药学院,山东 日照 276826;3. 山东第一医科大学药学院,山东 泰安
271016)
中图分类号 R943 文献标志码 A 文章编号 1001-0408(2024)12-1431-06
DOI 10.6039/j.issn.1001-0408.2024.12.04
摘 要 目的 研究转铁蛋白靶向肽 T7(7pep)对聚乙二醇-聚己内酯(PEG-PCL)胶束在人宫颈癌 HeLa 细胞内转运行为的影响。
方法 以香豆素-6(C6)为荧光指示探针,通过薄膜分散法制备包载有 C6 的 PEG-PCL(PEG-PCL-C6)胶束以及靶头 7pep 修饰的
PEG-PCL(7pep-PEG-PCL-C6)胶束。比较两种胶束的粒径、多分散指数及外观形态;比较两种胶束被HeLa细胞实时摄取的情况
及其入胞后与早期内吞体(EE)、内吞循环室(ERC)、晚期内吞体(LE)的共定位情况。结果 PEG-PCL-C6和7pep-PEG-PCL-C6胶
束的平均粒径分别为(75.0±2.3)、(82.0±1.5)nm,多分散指数分别为0.17±0.20、0.17±0.32,外观均为规整的圆球形。7pep-PEG-
PCL-C6胶束的入胞速度和入胞量均明显快/多于PEG-PCL-C6胶束。7pep-PEG-PCL-C6胶束比PEG-PCL-C6胶束能够更快地进
入 EE,而入胞后 PEG-PCL-C6 胶束进入 ERC 的速率较 7pep-PEG-PCL-C6 胶束快,且 PEG-PCL-C6 胶束和 7pep-PEG-PCL-C6 胶束
在LE均有逐渐累积的趋势,但7pep-PEG-PCL-C6胶束入胞60 min时与LE的皮尔森系数、信号重叠比率、共定位比率均显著低于
入胞 30 min 时(P<0.05 或 P<0.01)。结论 靶头 7pep 修饰可提高 PEG-PCL-C6 胶束的入胞速率和入胞量,还可改变其胞内转运
行为。
关键词 转铁蛋白靶向肽T7;胶束;转铁蛋白受体;靶向递送系统;细胞转运
Effects of targeting modification on intracellular transportation of PEG-PCL micelles in human cervical
cancer cells
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YANG Jinjin ,YU Qinghua ,YU Lingbo ,ZHANG Yadong ,LIANG Dongqin ,SUN Yuyu ,WANG
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Huiyun ,CUI Yanan (1. School of Pharmacy, Shandong Second Medical University, Shandong Weifang
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261053, China;2. School of Pharmacy, Jining Medical University, Shandong Rizhao 276826, China;3. School
of Pharmacy, Shandong First Medical University, Shandong Tai’an 271016, China)
ABSTRACT OBJECTIVE To study the effects of transferrin-targeting peptide T7 (7pep) on intracellular transportation of
polyethylene glycol-polycaprolactone (PEG-PCL) micelles in human cervical cancer HeLa cells. METHODS Using coumarin-6
(C6) as fluorescent indicator probe, both coumarin-6 (C6)-loaded PEG-PCL (PEG-PCL-C6) micelles and 7pep-modified PEG-
PCL (7pep-PEG-PCL-C6) micelles were prepared by film-dispersion method. The particle size, polydispersity index and appearance
morphology were compared between two types of micelles; the real-time uptake of two types of micelles by HeLa cells was
compared, and the colocalization of two types of micelles with early endosomes (EE), endocytic recycling compartments (ERC)
and late endosomes (LE) after entry into the cells was observed. RESULTS The particle sizes of PEG-PCL-C6 and 7pep-PEG-PCL-
C6 micelles were(75.0±2.3)and(82.0±1.5)nm; the polymer dispersity indexes were 0.17±0.20 and 0.17±0.32, respectively,
with a regular spherical appearance. The colocalization results showed that entry speed and amount of 7pep-PEG-PCL-C6 micelles
were significantly faster/more than those of PEG-PCL-C6 micelles. 7pep-PEG-PCL-C6 micelles entered EE faster than PEG-PCL-C6
micelles, while PEG-PCL-C6 micelles entered ERC at a faster rate than 7pep-PEG-PCL-C6 micelles, and both PEG-PCL-C6
micelles and 7pep-PEG-PCL-C6 micelles tended to accumulate gradually in LE; Pearson coefficient, signal overlap ratio, and
colocalization ratio of 7pep-PEG-PCL-C6 micelles with LE were significantly lower 60 minutes after entering the cell than those 30
minutes after entering the cell (P<0.05 or P<0.01).
Δ 基金项目 国家自然科学基金项目(No.81903553);山东省自然
CONCLUSIONS Targeting 7pep modification can increase the
科学基金项目(No.ZR2017QH006);济宁医学院教育教学研究项目
entry speed and amount of PEG-PCL-C6 micelles, and also
(No.yb202223)
* 第一作者 硕 士 研 究 生 。 研 究 方 向 :药 剂 学 。 E-mail: alter their intracellular transportation behavior.
yangjinjin0328@163.com KEYWORDS transferrin-targeting peptide T7; micelle;
# 通信作者 副教授,硕士生导师,博士。研究方向:药物递送及机 transferrin receptor; targeting drug delivery system; cellular
制。E-mail:guancyn@sina.com transport
中国药房 2024年第35卷第12期 China Pharmacy 2024 Vol. 35 No. 12 · 1431 ·