In the 90s, the development of a novel single molecule technique based on nanopore sensing emerged. Preliminary improvements were based on the molecular or biological engineering of protein nanopores along with the use of nanotechnologies developed in the context of microelectronics. Since the last decade, the convergence between those two worlds has allowed for biomimetic approaches. In this respect, the combination of nanopores with aptamers, single-stranded oligonucleotides specifically selected towards molecular or cellular targets from an in vitro method, gained a lot of interest with potential applications for the single molecule detection and recognition in various domains like health, environment or security. The recent developments performed by combining nanopores and aptamers are highlighted in this review and some perspectives are drawn.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7472324 | PMC |
http://dx.doi.org/10.3390/s20164495 | DOI Listing |
Micromachines (Basel)
December 2024
Ames National Laboratory, Mechanical Engineering Department, Iowa State University, Ames, IA 50014, USA.
We report a low-cost, portable biosensor composed of an aptamer-functionalized nanoporous anodic aluminum oxide (NAAO) membrane and a commercial microcontroller chip-based impedance reader suitable for electrochemical impedance spectroscopy (EIS)-based sensing. The biosensor consists of two chambers separated by an aptamer-functionalized NAAO membrane, and the impedance reader is utilized to monitor transmembrane impedance changes. The biosensor is utilized to detect amodiaquine molecules using an amodiaquine-binding aptamer (OR7)-functionalized membrane.
View Article and Find Full Text PDFSmall
January 2025
Department of Chemistry, University of Missouri, Columbia, MO, 65211, USA.
Small molecules play important roles in a variety of biological processes such as metabolism, cell signaling and enzyme regulation, and can serve as valuable biomarkers for human diseases. Moreover, they are essential to drug discovery and development, and are important targets for environmental monitoring and food safety. Due to the size incompatibility, small molecule transport is difficult to be monitored with a nanopore.
View Article and Find Full Text PDFJ Agric Food Chem
January 2025
Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Conquering surface fouling of sensors caused by nonspecific adsorption and accumulation of foulants in a food matrix is of significance in accurate food safety analysis. Herein, an antifouling electrochemical aptasensor based on a Y-shaped peptide and nanoporous gold (NPG) for aflatoxin B1 detection in milk, tofu, and rice flour was proposed. The self-designed Y-shaped peptide involves an anchoring segment (-C), a support structure (-PPPP-), and an antifouling domain with two branches (-EK(KSRE)DER-) inspired by two bioactive peptides.
View Article and Find Full Text PDFTalanta
March 2025
School of Henan Industry and Trade Vocational College, Zhengzhou, Henan Province, 451191, China. Electronic address:
Acute myocardial infarction (AMI) is one of the top contributors to global disease mortality. AMI biomarkers, such as cardiac troponin I (cTnI), are often detected with enzyme-linked immunosorbent assay (ELISA) that suffers from several well-known drawbacks such as poor stability and slow and cumbersome operation. Therefore, it is necessary to develop a new analytical technique that can rapidly analyse and detect cTnI for early screening of AMI.
View Article and Find Full Text PDFFront Chem
November 2024
Guangxi Medical University Cancer Hospital, Nanning, China.
Disposable electrochemical biosensors with high sensitivity are very fit for point-of-care testing in clinical diagnosis. Herein, amino-functionalized, vertically ordered mesoporous silica films (NH-VMSF) attached to an electrochemically polarized screen-printed carbon electrode (p-SPCE) are prepared using a simple electrochemical method and then utilized to construct a gated electrochemical aptasensor for rapid and sensitive determination of carcinoembryonic antigen (CEA). After being treated with the electrochemical polarization procedure, p-SPCE has plentiful oxygen-containing groups and improved catalytic ability, which help promote the stability of NH-VMSF on SPCE without the use of an adhesive layer and simultaneously generate a highly electroactive sensing interface.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!