Comparison of aptamer signaling mechanisms reveals disparities in sensor response and strategies to eliminate false signals

O Alkhamis, J Canoura, C Willis, L Wang… - Journal of the …, 2023 - ACS Publications
Aptamers are nucleic acid-based affinity reagents that have been incorporated into a variety
of molecular sensor formats. However, many aptamer sensors exhibit insufficient sensitivity …

High-throughput quantitative binding analysis of DNA aptamers using exonucleases

J Canoura, O Alkhamis, Y Liu, C Willis… - Nucleic Acids …, 2023 - academic.oup.com
Aptamers are nucleic acid bioreceptors that have been used in various applications
including medical diagnostics and as therapeutic agents. Identifying the most optimal …

Using distal-site mutations and allosteric inhibition to tune, extend, and narrow the useful dynamic range of aptamer-based sensors

A Porchetta, A Vallée-Bélisle, KW Plaxco… - Journal of the American …, 2012 - ACS Publications
Here we demonstrate multiple, complementary approaches by which to tune, extend, or
narrow the dynamic range of aptamer-based sensors. Specifically, we employ both distal …

Engineering signaling aptamers that rely on kinetic rather than equilibrium competition

Y Du, SJ Zhen, B Li, M Byrom, YS Jiang… - Analytical …, 2016 - ACS Publications
During the past decade, aptasensors have largely been designed on the basis of the notion
that ligand-modulated equilibration between aptamer conformations could be exploited for …

Structure-switching signaling aptamers

R Nutiu, Y Li - Journal of the American Chemical Society, 2003 - ACS Publications
Aptamers are single-stranded nucleic acids with defined tertiary structures for selective
binding to target molecules. Aptamers are also able to bind a complementary DNA …

Facile conversion of aptamers into sensors using a 2 '-ribose-linked fluorophore

EJ Merino, KM Weeks - Journal of the American Chemical Society, 2005 - ACS Publications
In vitro selection can be used to identify nucleic acid receptors, called aptamers, that bind
diverse small molecule targets. Aptamers therefore represent an attractive platform for …

Aptamer modules as sensors and detectors

M Famulok, G Mayer - Accounts of chemical research, 2011 - ACS Publications
Aptamers comprise a range of molecular recognition scaffolds that can be engineered to
bind to a legion of different proteins and other targets with excellent specificity and affinity …

Systematically Modulating Aptamer Affinity and Specificity by Guanosine-to-Inosine Substitution

BA Manuel, SA Sterling, AA Sanford… - Analytical …, 2022 - ACS Publications
Aptamers are widely used in small molecule detection applications due to their specificity,
stability, and cost effectiveness. One key challenge in utilizing aptamers in sensors is …

Tuning biosensor cross-reactivity using aptamer mixtures

Y Liu, H Yu, O Alkhamis, J Moliver, Y Xiao - Analytical chemistry, 2020 - ACS Publications
It is challenging to tune the response of biosensors to a set of ligands, for example, cross-
reactivity to a given target family while maintaining high specificity against interferents, due …

Aptamer-based molecular recognition for biosensor development

J Zhou, MR Battig, Y Wang - Analytical and bioanalytical chemistry, 2010 - Springer
Nucleic acid aptamers are an emerging class of synthetic ligands and have recently
attracted significant attention in numerous fields. One is in biosensor development. In …