title: Two-wheel drive-based DNA nanomachine and its sensing potential for highly sensitive analysis of cancer-related gene.
abstract: With the biological significance and important advances of nano-scale DNA devices, scientific activities have been directed toward developing molecular machinery. In this work, we present a novel two-wheel drive-based DNA nanomachine composed of one signaling recognition probe (SRP), one label-free recognition probe (LRP), and one driving primer (DP). Target DNA hybridization can activate LRP-based wheel driving by resorting to DP-mediated polymerization/nicking/displacement cycles. This in turn results in the accumulation of nicked strand 1 (NS1) that can initiate extended SRP-based wheel driving. As a result, the hairpin structure of SRP is stretched and pre-quenched fluorescence is restored. Meanwhile, lots of nicked strand 2 (NS2) are produced, which could hybridize perfectly with SRP and lead to further fluorescence amplification. It is worth noting that, because the nanomachine operation relies strongly on inputted target trigger, the unwanted background is completely eliminated. The detection limit of 1 pM and an excellent capability to recognize the single-base mutation were achieved. Significantly, the interrogating of target trigger extracted from cancer cells is already available, reflecting the potential for practical applications. As a proof-of-concept building, the unique analytical properties would significantly benefit the DNA nanomachines and reveal great promise in biochemical and biomedical studies.
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China.
authors.forename: Jianguo
authors.initials: J
authors.lastname: Xu
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China. Electronic address: wuzaisheng@163.com.
authors.forename: Zai-Sheng
authors.initials: ZS
authors.lastname: Wu
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China.
authors.forename: Zhenmeng
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China.
authors.forename: Hongling
authors.initials: H
authors.lastname: Li
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China.
authors.forename: Jingqing
authors.initials: J
authors.lastname: Le
authors.affiliation: Cancer Metastasis Alert and Prevention Center, Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fujian Provincial Key Laboratory of Cancer Metastasis Chemoprevention and Chemotherapy, Fuzhou University, Fuzhou, 350002, China. Electronic address: pharmlink@gmail.com.
authors.forename: Lee
authors.initials: L
authors.lastname: Jia
mesh_terms: D000072283:A549 Cells; D001483:Base Sequence; D015374:Biosensing Techniques / Q000379:methods*; D004247:DNA / Q000737:chemistry / Q000235:genetics*; D017931:DNA Primers / Q000737:chemistry / Q000235:genetics; D006801:Humans; D057230:Limit of Detection; D036103:Nanotechnology; D009369:Neoplasms / Q000235:genetics*; D009693:Nucleic Acid Hybridization; D017354:Point Mutation; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D017931:DNA Primers; D016159:Tumor Suppressor Protein p53; D004247:DNA
keywords: Cancer-related gene; DNA nanomachine; Signal amplification; Two-wheel drive