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Related Experiment Video

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Monitoring Protein Adsorption with Solid-state Nanopores
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Selective protein detection with a dsLNA-functionalized nanopore.

Paola Fanzio1, Valentina Mussi2, Michele Menotta3

  • 1Department of Physics, University of Genoa, via Dodecaneso 33, 16146 Genova, Italy.

Biosensors & Bioelectronics
|September 15, 2014
PubMed
Summary
This summary is machine-generated.

Chemically functionalized nanopores can electrically detect Nuclear Factor-kappa B (NF-κB) proteins, crucial for diagnosing inflammation and disorders. This method shows promise for analyzing complex biological samples in diagnostics.

Keywords:
BiosensorFunctionalizationNF-κBNanoporeProtein detection

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Area of Science:

  • Nanopore technology
  • Biomolecule detection
  • Protein analysis

Background:

  • Nanopore technology has shifted focus from nucleic acids to protein and DNA-protein complex analysis.
  • Nuclear Factor-kappa B (NF-κB) proteins are implicated in various disorders and inflammation processes.
  • Accurate identification of NF-κB is vital for prognostic applications.

Purpose of the Study:

  • To demonstrate the use of chemically functionalized solid-state nanopores for recognizing Nuclear Factor-kappa B (NF-κB) proteins.
  • To electrically detect the specific interaction between NF-κB family protein p50 and dsLNA probes.
  • To assess the nanopore device's effectiveness in analyzing complex biological samples like whole cell extracts.

Main Methods:

  • Utilized chemically functionalized solid-state nanopores fabricated from SiN.
  • Covalently attached dsLNA probe molecules to the nanopore surface.
  • Electrically detected interactions between the p50 protein and dsLNA probes.
  • Compared results with non-interacting BSA protein and analyzed whole cell extracts.

Main Results:

  • Successfully detected specific interactions between the p50 protein and dsLNA probes.
  • Demonstrated selective detection by comparing with BSA protein.
  • Identified three distinct peaks in electrical event duration when analyzing whole cell extracts, corresponding to different NF-κB complexes.
  • Showcased the method's effectiveness for complex biological samples.

Conclusions:

  • The functionalized nanopore device exhibits high selectivity and versatility for bioanalytical applications.
  • This technology is applicable for advanced diagnostics, particularly in identifying NF-κB related biomarkers.
  • The method provides a sensitive platform for studying protein interactions and complex biological mixtures.