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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

840
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
840

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Related Experiment Video

Updated: Dec 3, 2025

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo
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Bioluminescence Methodology for Ion Channel Studies.

Paul A Wadsworth1,2, Aditya K Singh2, Nghi Nguyen3

  • 1Biochemistry and Molecular Biology Graduate Program, The University of Texas Medical Branch, Galveston, TX, USA.

Methods in Molecular Biology (Clifton, N.J.)
|October 29, 2020
PubMed
Summary

This study developed a novel assay to screen for drugs targeting ion channel protein interactions. The assay enables faster drug discovery for channelopathies by reconstituting protein complexes in cells.

Keywords:
Assay developmentAssay optimizationBioluminescenceHTSNav channelsPort-a-Patch

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • Ion channels are crucial for cellular functions and are key targets in drug discovery.
  • Reconstituting ion channel complexes in physiological conditions for screening is challenging.
  • Allosteric modulators offer precise control over channel function but require advanced screening methods.

Purpose of the Study:

  • To develop and optimize an in-cell assay for screening protein-protein interactions within ion channel complexes.
  • To enable high-throughput screening (HTS) for identifying modulators of ion channel function.
  • To facilitate rapid hit validation for drug discovery targeting channelopathies.

Main Methods:

  • Development of a split-luciferase complementation assay (LCA) to reconstitute Nav1.6 and FGF14 interactions.
  • Miniaturization and optimization of the LCA for 384-well plate HTS.
  • Integration with semi-automated planar patch-clamp electrophysiology for functional validation.

Main Results:

  • A robust, in-cell HTS platform for ion channel protein-protein interactions was established.
  • The optimized LCA allows for rapid estimation of hit potency and efficacy.
  • The platform supports drug repurposing and the development of novel therapeutic probes.

Conclusions:

  • The developed HTS platform provides a flexible and rapid method for early-phase drug discovery targeting ion channels.
  • This approach accelerates hypothesis generation and target selection for channelopathies.
  • The assay can be adapted for various ion channel complexes to explore signaling pathways and identify new therapeutic strategies.