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Wang L, Zhang H, Wang C, Xu Y, Su J, Wang X, Liu X, Feng D, Wang L, Zuo X, Shi J, Ge Z, Fan C, Mi X. Poly-adenine-mediated spherical nucleic acids for strand displacement-based DNA/RNA detection. Biosens Bioelectron 2018; 127:85-91. [PMID: 30594078 DOI: 10.1016/j.bios.2018.12.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 11/29/2018] [Accepted: 12/05/2018] [Indexed: 01/08/2023]
Abstract
DNA-gold nanoparticles (AuNPs) conjugate is one of the most versatile bionanomaterials for biomedical and clinical diagnosis. However, to finely tune the hybridization ability and precisely control the orientation and conformation of surface-tethered oligonucleotides on AuNPs remains a hurdle. In this work, we developed a poly adenine-mediated spherical nucleic acid (polyA-mediated SNA) strategy by assembling di-block DNA probes on gold nanoparticles (AuNPs) to spatially control interdistance and hybridization ability of oligonucleotides on AuNPs. By modulating length of poly A bound on the SNA with different degrees of constructing, we presented significant improved biosensing performance including high hybridization efficiency, and expanded dynamic range of analytes with more sensitive detection limit. Furthermore, this polyA design could facilitate the programmable detection for DNA in serum environment and simultaneous multicolor detection of three different microRNAs associated with pancreatic carcinoma. The demonstration of the link between modulation of SNA assembly strategy and biodetection capability will increase the development of high performance diagnostic tools for translational biomedicine.
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Affiliation(s)
- Lu Wang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Huan Zhang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Chenguang Wang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Yi Xu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Jing Su
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Xiao Wang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Xinxin Liu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Dezhi Feng
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China
| | - Lihua Wang
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Xiaolei Zuo
- School of Chemistry and Chemical Engineering, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jiye Shi
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Zhilei Ge
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; School of Chemistry and Chemical Engineering, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Chunhai Fan
- Division of Physical Biology & Bioimaging Center, Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; School of Chemistry and Chemical Engineering, Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xianqiang Mi
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201220, China.
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Zou L, Ling L. Ultrasensitive Detection of HIV DNA with Polymerase Chain Reaction-Dynamic Light Scattering. Anal Chem 2018; 90:13373-13377. [PMID: 30345744 DOI: 10.1021/acs.analchem.8b03052] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Early diagnosis of HIV biomarkers or genes is the key to reducing acquired immunodeficiency syndrome (AIDS) mortality. In our work, we developed a novel polymerase chain reaction-dynamic light scattering (PCR-DLS) assay for one-step sensitive detection of HIV DNA based on the average-diameter change of gold nanoparticles (AuNPs). This is the first PCR assay that makes use of the DLS technique as a signal read-out, with the particle size measured by DLS increasing with the concentration of target DNA. With the help of the AuNP probes, this PCR-DLS assay can effectively improve the specificity of PCR reactions, which can greatly increase the detection sensitivity, with a detection limit of 1.8 aM (S/N = 3). In addition, the proposed strategy was successfully used to analyze target DNA in human serum samples, indicating that the PCR-DLS assay has a promising potential application for rapid and early clinical diagnosis of HIV infection.
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Affiliation(s)
- Li Zou
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , PR China.,School of Pharmacy , Guangdong Pharmaceutical University , Guangzhou 510006 , PR China
| | - Liansheng Ling
- School of Chemistry , Sun Yat-Sen University , Guangzhou 510275 , PR China
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