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Self-Powered FEN1 Biosensor Based on Accelerated CRISPR/Cas Trans-Cleavage around Porous FeO Nanoparticles. | LitMetric

AI Article Synopsis

  • Flap endonuclease 1 (FEN1) is crucial for genome integrity, and this research introduces a novel biosensor for its detection using electrochemistry.
  • The biosensor utilizes porous FeO nanoparticles that hold single-strand DNA probes, allowing for the electrochemical measurement of FEN1 activity when cleaved by a specially designed DNA probe.
  • The high sensitivity of the biosensor, enhanced by nanoparticle use and CRISPR/Cas technology, shows promise for early disease diagnosis and screening potential FEN1 inhibitors in drug discovery.

Article Abstract

Flap endonuclease 1 (FEN1) is a structure-specific endonuclease that plays a critical role in the maintenance of genome integrity. In this work, we demonstrate a novel self-powered electrochemical FEN1 biosensor for potential applications in molecular diagnosis. Porous FeO nanoparticles are first prepared, and single-strand DNA probes are absorbed on the surface of the nanoparticles. Thus, electrochemical species of [Fe(CN)] can be encapsulated inside the porous nanoparticles with the molecular gate of negatively charged DNA. On the other hand, a dumbbell structured DNA probe with 5' flap is designed. FEN1 is able to cleave the flap and activate the CRISPR/Cas system for the digestion of single-stranded DNA around FeO nanoparticles. As a result, the leakage of [Fe(CN)] contributes to an enhanced electrochemical response, which can be used to reveal the level of FEN1. The high sensitivity of this biosensor is due to the application of porous nanomaterials and Mn accelerated CRISPR/Cas cleavage. It succeeds in detection of biological samples and screening of FEN1 inhibitors. Therefore, this proposed method has potential applications in the early diagnosis of diseases and drug discovery.

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Source
http://dx.doi.org/10.1021/acsami.4c14192DOI Listing

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