高等学校化学学报 ›› 2023, Vol. 44 ›› Issue (2): 20220563.doi: 10.7503/cjcu20220563

• 分析化学 • 上一篇    下一篇

框架核酸高通量检测芯片

宋璐1,2,3, 张舒阳3, 王丽华1, 左小磊3, 李敏3()   

  1. 1.中国科学院上海应用物理研究所物理生物学实验室, 中国科学院界面物理与技术重点实验室, 上海 201800
    2.中国科学院大学, 北京 100049
    3.上海交通大学医学院分子医学研究院, 上海市核酸化学与纳米医学重点实验室, 上海 200127
  • 收稿日期:2022-08-23 出版日期:2023-02-10 发布日期:2022-10-13
  • 通讯作者: 李敏 E-mail:limin2021@sjtu.edu.cn
  • 作者简介:第一联系人:共同第一作者.
  • 基金资助:
    国家重点研发计划项目(2021YFF1200300);国家自然科学基金(21904086)

High-throughput Biological Microarrays Based on Framework Nucleic Acids

SONG Lu1,2,3, ZHANG Shuyang3, WANG Lihua1, ZUO Xiaolei3, LI Min3()   

  1. 1.Division of Physical Biology,CAS Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Institute of Molecular Medicine,Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine,School of Medicine,Shanghai Jiao Tong University,Shanghai 200127,China
  • Received:2022-08-23 Online:2023-02-10 Published:2022-10-13
  • Contact: LI Min E-mail:limin2021@sjtu.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2021YFF1200300);the National Natural Science Foundation of China(21904086)

摘要:

构建了一种基于框架核酸的高通量生物检测芯片. 利用超微量移液自动化平台, 将包含框架核酸探针的液滴按照预设命令固定至生物芯片微阵列上, 在探针捕获核酸靶标后利用集成的基因芯片扫描仪对芯片进行成像, 通过分析荧光强度定量化分析靶标浓度. 结果表明, 此框架核酸芯片能够实现框架核酸探针的高通量制备, 24 h即可制备具有15万个点的微阵列, 且点间距离的相对偏差W≤10%、 荧光强度的变异系数CV=3.30%, 具有较高的稳定性, 远高于国家标准. 此外, 该芯片具备高灵敏度、 可寻址的高通量生物分析能力, 对核酸靶标的检测限可达100 pmol/L. 随着多种探针技术的发展, 生物检测微阵列技术在高通量生物分析领域展示出巨大的潜力.

关键词: 高通量检测, 框架核酸, 核酸靶标, 生物微阵列芯片

Abstract:

A high-throughput biological microarray based on framework nucleic acid(FNA) was constructed. Using an automated ultra-micro pipetting platform, the droplets containing FNAs-based probes were fabricated onto the glass substrates according to the pre-defined commands. After the targets were captured by the probes, the micro- arrays were scanned by the integrated gene chip scanner, the results of which could be further used for the quantifi- cation of target concentration. It was found that the FNA probes could be prepared with high throughput on the bio- logical microarrays, and the microarrays with 150000 spots can be prepared within 24 h. Moreover, the relative deviation(W) of distance between the points is less than 10%, and the coefficient of variation(CV) of fluorescence intensity is 3.30%. The properties of each spot on the microarrays were stable, which is much higher than the national standard. Additionally, we demonstrated that the FNA-based microarray possessed high addressability, high sen- sitivity and high-throughput capabilities. The limit of detection for nucleic acid target was down to 100 pmol/L. With the progress of various probe technologies, the microarray platform shows great potential for bioanalysis.

Key words: High-throughput detection, Framework nucleic acid, Nucleic acid target, Biological microarray

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