Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (2): 20220563.doi: 10.7503/cjcu20220563

• Analytical Chemistry • Previous Articles     Next Articles

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)

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

CLC Number: 

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