高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (6): 20220033.doi: 10.7503/cjcu20220033

• 分析化学 • 上一篇    下一篇

SERS纳米探针对电刺激过程中细胞内产生活性氧的检测

陈嘉敏1,2, 曲孝章1,2, 齐国华3, 徐蔚青1,2, 金永东3, 徐抒平1,2()   

  1. 1.吉林大学化学学院, 超分子结构与材料国家重点实验室,
    2.理论化学研究所, 长春 130012
    3.中国科学院长春应用化学研究所, 电分析化学国家重点实验室, 长春 130022
    4.吉林大学第一医院, 长春 130031
  • 收稿日期:2022-01-13 出版日期:2022-06-10 发布日期:2022-02-18
  • 通讯作者: 徐抒平 E-mail:xusp@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(21873039);2021年度应用光学国家重点实验室开放基金(SKLAO2021001A);吉林大学学科交叉融合创新项目(JLUXKJC2020106)

SERS Nanoprobe for the Detection of Reactive Oxygen Species in Cells Produced by Electrostimulus

CHEN Jiamin1,2, QU Xiaozhang1,2, QI Guohua3, XU Weiqing1,2, JIN Yongdong3, XU Shuping1,2()   

  1. 1.State Key Laboratory of Supramolecular Structure and Materials,College of Chemistry
    2.Institute of Theoretical Chemistry,Jilin University,Changchun 130012,China
    3.State Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    4.First Hospital of Jilin University,Changchun 130031,China
  • Received:2022-01-13 Online:2022-06-10 Published:2022-02-18
  • Contact: XU Shuping E-mail:xusp@jlu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21873039);the Open Project of State Key Laboratory of Applied Optics, China(SKLAO2021001A14);the Interdisciplinary Integration Innovation Project of Jilin University, China(JLUXKJC2020106)

摘要:

电刺激是用于细胞内紊乱电活动引起疾病的一类重要治疗方式. 在电刺激过程中是否会诱导细胞内活性氧(ROS)水平的改变, 以及常规抗氧化抑制药物与电刺激治疗同时运用带来的影响, 目前尚未有相关研究. 本文设计了一种具有较好生物相容性的金/银核壳纳米棒表面增强拉曼(SERS)活性探针, 用于电刺激过程中细胞内产生ROS的检测. 将该探针与细胞共孵育, 使其内化入细胞, 对细胞进行不同时间的电刺激, 利用拉曼光谱对SERS探针的信号进行检测. 实验结果表明, 随着电刺激时间的延长, SERS信号减弱, 说明细胞内产生ROS的量明显增加. 该传感机制是利用ROS能刻蚀金/银核壳纳米棒的银壳, 从而使其变薄引起SERS信号减弱. 抗坏血酸(AA)和谷胱甘肽(GSH)两种抗氧化抑制剂类药物与电刺激同时运用时, 可观察到它们会对电刺激过程产生的ROS有清除作用. 该研究发展了一类用于细胞内ROS检测的光谱方法, 也为异常的氧化应激和肿瘤治疗过程中的组合用药提供了建议.

关键词: 活性氧, 表面增强拉曼光谱, 电刺激, 原位检测

Abstract:

Electrostimulus(ES) is an important therapeutic method for diseases caused by abnormal intracellular electrical activity. Also, ES can induce apoptosis of cells, which is a potential tumor treatment method. At present, there are no relevant studies on the intracellular reactive oxygen species(ROS) levels produced in the process of ES, and what effects will be brought by the simultaneous implementation of conventional antioxidant inhibitor drugs and ES therapy. In this study, a kind of gold/silver core-shell nanorod-based surface-enhanced Raman(SERS)-active probe with good biocompatibility was designed for the detection of intracellular ROS generated during ES. The sensing mechanism realized the quantitative analysis of ROS based on the principle that ROS could etch the silver shell, leading to a decrease of the SERS signal of the SERS probe. The probe was co-incubated with cells and was internalized into cells. The cells were then electrically stimulated for different periods of time. Finally, the signal of the SERS probe was detected in vivo. The experimental results show that the SERS signal weakens with the extension of ES time, indicating that the amount of ROS produced in cells increases significantly. In addition, two antioxidation inhibitors, ascorbic acid(AA) and glutathione(GSH), were studied when combined with ES. It was observed that they could eliminate reactive oxygen species(ROS) produced by electrical stimulation. This study developed a new method for intracellular ROS detection and suggests a combination of drugs for abnormal oxidative stress and tumor therapy. Also, ES can induce apoptosis of cells, which is a potential tumor treatment method.

Key words: Reactive oxygen species, Surface-enhanced Raman spectroscopy, Electrostimulus, in situ Detection

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