1
|
Afari MNK, Lönnberg T. Base-Filling in Double-Helical Nucleic Acids. ChemistryOpen 2024; 13:e202400088. [PMID: 38709096 PMCID: PMC11467735 DOI: 10.1002/open.202400088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/10/2024] [Indexed: 05/07/2024] Open
Abstract
Base-filling, i. e., post-synthetic furnishing of an oligonucleotide scaffold with base moieties or their analogues, is an interesting alternative to the conventional approach of sequential coupling of building blocks (modified or otherwise). Reversible attachment of the base moieties is particularly attractive as it allows the use of dynamic combinatorial chemistry and usually leads to higher fidelity. This concept article summarizes the various backbones and coupling reactions used for base-filling over the past fifteen years, discusses the impact of base stacking and pairing on efficiency and fidelity and highlights potential and realized applications.
Collapse
Affiliation(s)
| | - Tuomas Lönnberg
- Department of ChemistryUniversity of TurkuHenrikinkatu 220500TurkuFinland
| |
Collapse
|
2
|
Detassis S, Precazzini F, Brentari I, Ruffilli R, Ress C, Maglione A, Pernagallo S, Denti MA. SA-ODG platform: a semi-automated and PCR-free method to analyse microRNAs in solid tissues. Analyst 2024; 149:3891-3899. [PMID: 38994789 DOI: 10.1039/d4an00783b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Over the past two decades, numerous techniques have been developed for analysing microRNAs in body fluids and tissues. However, these techniques still face technical challenges, particularly when compared to well-established techniques for proteins and metabolites. Recently, the ODG platform was introduced, which is an innovative technology that allows for the direct detection and quantification of microRNAs in liquid biopsies without requiring extraction or amplification. This study presents the implementation of the ODG platform within a semi-automated protocol to create the "SA-ODG" platform, enhancing the efficiency and precision of microRNA testing while reducing hands-on time required by laboratory staff. For the first time, the SA-ODG platform has been used to directly quantify microRNAs in solid tissues. The results demonstrate precise analysis of miR-122-5p in mouse liver tissues using SA-ODG. These developments represent a crucial step forward in advancing the field of extraction and amplification-free microRNA detection and quantification.
Collapse
Affiliation(s)
- S Detassis
- OPTOI SRL, Via Vienna 8, 38121, Trento, Italy.
| | - F Precazzini
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - I Brentari
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, 38123, Trento, Italy
| | - R Ruffilli
- OPTOI SRL, Via Vienna 8, 38121, Trento, Italy.
| | - C Ress
- OPTOI SRL, Via Vienna 8, 38121, Trento, Italy.
| | - A Maglione
- OPTOI SRL, Via Vienna 8, 38121, Trento, Italy.
| | - S Pernagallo
- DESTINA Genomica SL, Parque Tecnológico de la Salud (PTS), Avenida de la Innovación 1, 18016 Granada, Spain
| | - M A Denti
- Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, Via Sommarive 9, 38123, Trento, Italy
| |
Collapse
|
3
|
Xiong J, He Z, Wang L, Fan C, Chao J. DNA Origami-Enabled Gene Localization of Repetitive Sequences. J Am Chem Soc 2024; 146:6317-6325. [PMID: 38391280 DOI: 10.1021/jacs.4c00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Repetitive sequences, which make up over 50% of human DNA, have diverse applications in disease diagnosis, forensic identification, paternity testing, and population genetic analysis due to their crucial functions for gene regulation. However, representative detection technologies such as sequencing and fluorescence imaging suffer from time-consuming protocols, high cost, and inaccuracy of the position and order of repetitive sequences. Here, we develop a precise and cost-effective strategy that combines the high resolution of atomic force microscopy with the shape customizability of DNA origami for repetitive sequence-specific gene localization. "Tri-block" DNA structures were specifically designed to connect repetitive sequences to DNA origami tags, thereby revealing precise genetic information in terms of position and sequence for high-resolution and high-precision visualization of repetitive sequences. More importantly, we achieved the results of simultaneous detection of different DNA repetitive sequences on the gene template with a resolution of ∼6.5 nm (19 nt). This strategy is characterized by high efficiency, high precision, low operational complexity, and low labor/time costs, providing a powerful complement to sequencing technologies for gene localization of repetitive sequences.
Collapse
Affiliation(s)
- Jinxin Xiong
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Zhimei He
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Lianhui Wang
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, New Cornerstone Science Laboratory, Frontiers Science Center for Transformative Molecules, Zhangjiang Institute for Advanced Study and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
- Institute of Molecular Medicine, Shanghai Key Laboratory for Nucleic Acids Chemistry and Nanomedicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Jie Chao
- State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing 210023, China
| |
Collapse
|
4
|
Ni Y, Chen X, Ling C, Zhu Z, Yue Y, Wang J, He A, Liu R. Electrochemical peptide nucleic acid functionalized α-Fe 2O 3/Fe 3O 4 nanosheets for detection of CYP2C19*2 gene. Mikrochim Acta 2023; 190:189. [PMID: 37083854 DOI: 10.1007/s00604-023-05781-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 04/04/2023] [Indexed: 04/22/2023]
Abstract
The CYP2C19*2 gene carriers and non-carriers are closely related to the dosage of clopidogrel. To correctly guide the use of clopidogrel and promote individualized therapy, an ultra-sensitive electrochemical biosensor was developed for the detection of CYP2C19*2 gene. The heterogeneous α-Fe2O3/Fe3O4 nanosheets were prepared via the hydrothermal-calcination process, and the preparation parameters were optimized. The average diameter and thickness of the nanosheets were approximately 150 nm and 53 nm, respectively; and the saturation magnetization was 80.2 emu/g. The α-Fe2O3/Fe3O4@Au nanosheets were prepared by sodium borohydride reduction method, and self-assembled to the electrode surface with magnetic field. Ultra-sensitive detection of CYP2C19*2 gene was realized through the recognition ability of strong single base mismatching of peptide nucleic acid and signal amplification effect of magnetic α-Fe2O3/Fe3O4@Au nanosheets. Under optimal detection conditions, the current had a good linear correlation with the negative logarithm of CYP2C19*2 gene concentration in the range 1 pM-1 nM, and the detection limit was 0.64 pM (S/N = 3). Meanwhile, the electrochemical signals of target DNA and incomplete complementary DNA were detected. The constructed biosensor exhibited good selectivity, reproducibility, and stability, providing a promising strategy for the detection of other gene mutations by electrochemical biosensors.
Collapse
Affiliation(s)
- Yun Ni
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Xiu Chen
- The People's Hospital of Danyang, Affiliated Danyang Hospital of Nantong University, Zhenjiang, 212300, People's Republic of China
| | - Chen Ling
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Ziye Zhu
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Yao Yue
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Jie Wang
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China
| | - Aolin He
- Affiliated Kunshan Hospital, Jiangsu University, Suzhou, 215300, People's Republic of China.
| | - Ruijiang Liu
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, People's Republic of China.
| |
Collapse
|
5
|
SARS-CoV-2 viral RNA detection using the novel CoVradar device associated with the CoVreader smartphone app. Biosens Bioelectron 2023; 230:115268. [PMID: 37030262 PMCID: PMC10060197 DOI: 10.1016/j.bios.2023.115268] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 03/25/2023] [Indexed: 04/01/2023]
Abstract
The COVID-19 pandemic has highlighted the need for innovative approaches to its diagnosis. Here we present CoVradar, a novel and simple colorimetric method that combines nucleic acid analysis with dynamic chemical labeling (DCL) technology and the Spin-Tube device to detect SARS-CoV-2 RNA in saliva samples. The assay includes a fragmentation step to increase the number of RNA templates for analysis, using abasic peptide nucleic acid probes (DGL probes) immobilized to nylon membranes in a specific dot pattern to capture RNA fragments. Duplexes are formed by labeling complementary RNA fragments with biotinylated SMART bases, which act as templates for DCL. Signals are generated by recognizing biotin with streptavidin alkaline phosphatase and incubating with a chromogenic substrate to produce a blue precipitate. CoVradar results are analysed by CoVreader, a smartphone-based image processing system that can display and interpret the blotch pattern. CoVradar and CoVreader provide a unique molecular assay capable of detecting SARS-CoV-2 viral RNA without the need for extraction, preamplification, or prelabeling steps, offering advantages in terms of time (∼3 h/test), cost (∼€1/test manufacturing cost) and simplicity (does not require large equipment). This solution is also promising for the development of assays for other infectious diseases.
Collapse
|