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Updated: Jul 11, 2026

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
Published on: May 26, 2021
Water and electrolyte absorption and secretion in the small intestine
1Institution Digestive Diseases Research Centre, St. Bartholomew's and The Royal London School of Medicine and Dentistry, Start 1, 2, Newark Street, London E1 2AD, UK.
Gene-knockout mice reveal insights into epithelial transport. This review covers water and electrolyte transport mechanisms, neurotransmitters, and potential cholera therapies.
Area of Science:
- Physiology
- Molecular Biology
- Gastroenterology
Background:
- Epithelial transport is crucial for water and electrolyte balance.
- Specific transport proteins and membrane receptors mediate these processes.
- Understanding these mechanisms is key to treating fluid and electrolyte disorders.
Purpose of the Study:
- To review the role of gene-knockout mice in studying epithelial transport.
- To discuss the coupling of water transport to Na-glucose cotransport.
- To explore enteric neurotransmitters, nitric oxide, and uroguanylin in intestinal function.
Main Methods:
- Utilizing gene-knockout mouse models to investigate specific protein functions.
- Reviewing existing data on secondary active transport mechanisms.
- Analyzing the effects of neurotransmitters and experimental treatments on epithelial transport.
Main Results:
- Gene-knockout mice provide valuable insights into transport protein and receptor roles.
- Secondary coupling of water transport to Na-glucose cotransport is a significant mechanism.
- Nitric oxide and uroguanylin show potential in modulating intestinal secretion.
Conclusions:
- Gene-knockout models are powerful tools for understanding epithelial physiology.
- Enteric neurotransmitters and signaling molecules play complex roles in fluid and electrolyte homeostasis.
- Further research into uroguanylin and nitric oxide may yield novel therapeutic strategies for secretory diarrheas.
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