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Related Experiment Video

Updated: Jan 20, 2026

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A Method to Prepare Claudin-Modulating Recombinant Proteins.

Keisuke Tachibana1, Masuo Kondoh2

  • 1Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan. nya@phs.osaka-u.ac.jp.

Methods in Molecular Biology (Clifton, N.J.)
|September 1, 2019
PubMed
Summary
This summary is machine-generated.

This study details using a non-cytotoxic part of Clostridium perfringens enterotoxin (C-CPE) to target claudins, which are key to epithelial tight junctions. This offers a novel strategy for modulating these junctions for drug delivery applications.

Keywords:
C-CPEClaudin binderDrug deliveryTight junctionTransepithelial/transendothelial electrical resistance

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Epithelial tight junctions control solute movement, making them crucial targets for drug delivery.
  • Claudins are essential structural proteins forming selective paracellular pathways within tight junctions.
  • Modulating tight junction integrity is vital for developing effective drug delivery strategies.

Purpose of the Study:

  • To provide a protocol for producing recombinant C-CPE proteins as claudin binders.
  • To establish methods for analyzing C-CPE binding affinity to claudins.
  • To outline a procedure for assessing the impact of C-CPE on tight junction integrity.

Main Methods:

  • Expression and purification of recombinant C-terminal Clostridium perfringens enterotoxin (C-CPE).
  • Assay development for quantifying C-CPE binding affinity to claudin receptors.
  • Experimental procedures to evaluate the modulation of epithelial tight junction integrity by C-CPE.

Main Results:

  • Successful expression and purification of recombinant C-CPE proteins.
  • Characterization of C-CPE binding affinity to claudins.
  • Demonstration of C-CPE's ability to modulate tight junction integrity.

Conclusions:

  • Recombinant C-CPE serves as a valuable tool for targeting claudins and modulating tight junctions.
  • The provided protocols facilitate the study and application of claudin binders in drug delivery.
  • This research advances strategies for leveraging tight junction modulation in therapeutic development.