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Related Concept Videos

Patch Clamp01:18

Patch Clamp

Many fundamental cell functions such as muscle contraction and nerve transmission rely on the electrical signals produced by the movement of positively and negatively charged ions across the cell membrane. One competent method to record current flowing across the whole cell or single ion channel is the patch-clamp technique.
In this method, a glass micropipette containing electrolyte solution is tightly sealed against a small portion of the cell membrane. As a result, a patch of the cell...
Targets for Drug Action: Overview01:26

Targets for Drug Action: Overview

Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
Pharmacogenomics: Identification of New Drug Targets01:29

Pharmacogenomics: Identification of New Drug Targets

Advances in genomics have profoundly influenced drug discovery by increasing both the speed and accuracy of pharmaceutical development. Pharmacogenomics, which examines how genetic variation influences drug response, facilitates the identification of novel therapeutic targets and enables patient stratification for personalized treatment. These strategies contribute to improved drug efficacy, minimized adverse effects, and more efficient clinical trial design.Mapping genetic differences...
Tight Junctions01:29

Tight Junctions

Tight junctions are molecular seals between cells that prevent the leaking of fluids, ions, and other small solutes across cavities and compartments in multicellular organisms. They are mainly composed of claudin and occludin transmembrane proteins, and other proteins such as tricellulin and JAM (junctional adhesion molecule). All these proteins are 4-pass transmembrane proteins, except JAM, which is a single-pass transmembrane protein belonging to the immunoglobulin superfamily. The...
Drug Discovery: Overview01:26

Drug Discovery: Overview

Drug discovery is a multifaceted process involving extensive screening, testing, and optimization of lead compounds to identify potential new drugs for therapeutic use. It combines several approaches, including screening large numbers of natural products, chemical modification of known active molecules, identification of new drug targets, and rational design based on biological mechanisms and drug-receptor structure. These approaches are carried out in both academic research laboratories and...
Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.

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Related Experiment Video

Updated: Jun 3, 2026

Three-Dimensional Culture of Murine Colonic Crypts to Study Intestinal Stem Cell Function Ex Vivo
07:46

Three-Dimensional Culture of Murine Colonic Crypts to Study Intestinal Stem Cell Function Ex Vivo

Published on: October 11, 2022

Claudin as a target for drug development.

A Takahashi1, M Kondoh, H Suzuki

  • 1Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka, Japan.

Current Medicinal Chemistry
|April 7, 2011
PubMed
Summary
This summary is machine-generated.

Tight junctions (TJs) regulate cell barriers and are key targets for drug absorption. Claudins, crucial TJ components, offer promising avenues for developing new therapies for various conditions.

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Last Updated: Jun 3, 2026

Three-Dimensional Culture of Murine Colonic Crypts to Study Intestinal Stem Cell Function Ex Vivo
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In vivo and in vitro Studies of Adaptor-clathrin Interaction
17:14

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Published on: January 26, 2011

Area of Science:

  • Biochemistry
  • Cell Biology
  • Pharmacology

Background:

  • Tight junctions (TJs) are essential for epithelial and endothelial barrier functions.
  • TJ modulation has been used for drug absorption enhancement since the 1980s.
  • Recent discoveries identified TJ components like occludin and claudin, advancing TJ-based pharmaceutical therapy.

Purpose of the Study:

  • To review the role of claudins in TJ barrier function.
  • To explore claudin-based drug development strategies.
  • To highlight the therapeutic potential of targeting claudins.

Main Methods:

  • Literature review of studies on tight junctions and claudins.
  • Analysis of claudin's role in drug absorption, cancer, viral infections, and inflammation.
  • Discussion of claudin-based drug targets and future pharmaceutical applications.

Main Results:

  • Claudin expression is altered in cancer and during inflammation.
  • Claudins are implicated in hepatitis C virus entry.
  • Modulating claudin barriers can enhance drug absorption, particularly in the jejunum.

Conclusions:

  • Claudins are critical components of tight junctions with diverse physiological roles.
  • Claudins represent promising drug targets for pharmaceutical development.
  • Targeting claudins may lead to significant therapeutic breakthroughs.