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RNA-seq03:21

RNA-seq

RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases. 
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...

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Rapid, Multiplexed, and Enzyme-Free Nucleic Acid Detection Using Programmable Aptamer-Based RNA Switches.

Zhaoqing Yan1,2,3, Amit Eshed1,3, Anli A Tang4,5

  • 1Department of Biomedical Engineering, Boston University, Boston, MA, USA.

Chem
|July 22, 2024
PubMed
Summary

New aptaswitches offer rapid, enzyme-free detection of nucleic acids. These aptamer-based RNA switches provide a sensitive, low-cost diagnostic tool for infectious diseases, enabling results in minutes.

Keywords:
RNAaptamerdiagnosticisothermal amplificationmultiplexingrapidsensorswitch

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Synthetic Biology

Background:

  • Rapid, low-cost diagnostic technologies are essential for infectious disease control.
  • Existing methods often require enzymes or complex equipment, limiting accessibility.

Purpose of the Study:

  • To develop a novel class of aptamer-based RNA switches (aptaswitches) for nucleic acid detection.
  • To create a versatile, enzyme-free diagnostic platform with high sensitivity and speed.

Main Methods:

  • Designed aptaswitches to recognize target nucleic acids and trigger reporter aptamer folding.
  • Integrated aptaswitches with isothermal amplification for enhanced sensitivity.
  • Tested aptaswitch performance using clinical saliva samples for SARS-CoV-2 detection.

Main Results:

  • Aptaswitches provide intense fluorescent readouts without enzymes, with signals generated in as little as 5 minutes.
  • Detection limits reached 1 RNA copy/μL when coupled with isothermal amplification.
  • Multiplexed aptaswitch assays achieved 96.67% accuracy for SARS-CoV-2 detection in saliva within 30 minutes.

Conclusions:

  • Aptaswitches are versatile tools for sequence-specific nucleic acid detection.
  • This technology enables rapid, sensitive, and low-cost diagnostics for infectious diseases.
  • Aptaswitches are readily integrated into point-of-care diagnostic assays.