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Nasal Potential Difference to Quantify Trans-epithelial Ion Transport in Mice
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Nasal potential difference to detect Na+ channel dysfunction in acute lung injury
R Mac Sweeney1, H Fischer, D F McAuley
1Respiratory Medicine Research Programme, Centre for Infection and Immunity, Queen’s University, Belfast, Northern Ireland.
American Journal of Physiology. Lung Cellular and Molecular Physiology
|November 30, 2010
Summary
Nasal potential difference (NPD) measurements reveal respiratory ion channel dysfunction in high-altitude pulmonary edema and neonatal respiratory distress syndrome. This technique may identify acute lung injury patients needing targeted therapy for Na(+) channel function.
Area of Science:
- Pulmonary medicine
- Physiology
- Medical diagnostics
Background:
- Pulmonary fluid clearance relies on ion transport via respiratory epithelial channels.
- Dysfunction of these ion channels is implicated in high-altitude pulmonary edema (HAPE) and neonatal respiratory distress syndrome (RDS).
- Nasal potential difference (NPD) measures in vivo ion channel function.
Purpose of the Study:
- To investigate the utility of NPD measurements in understanding respiratory ion channel function in pulmonary disorders.
- To explore the potential of NPD for diagnosing and guiding therapy in conditions like HAPE, RDS, and acute lung injury (ALI).
Main Methods:
- Utilizing nasal potential difference (NPD) measurements.
- Analyzing ion channel function in respiratory epithelia.
- Correlating NPD findings with clinical conditions such as HAPE, RDS, and ALI.
Main Results:
- NPD measurements in HAPE and RDS patients indicate impaired respiratory epithelial Na(+) channel function.
- Evidence suggests both inherent and acquired ion channel dysfunction in these conditions.
- NPD may identify ALI patients with specific ion channel phenotypes.
Conclusions:
- Nasal potential difference is a valuable tool for assessing respiratory epithelial ion channel function in vivo.
- Ion channel dysfunction is a key factor in the pathophysiology of HAPE, RDS, and potentially ALI.
- NPD has the potential to guide targeted therapeutic strategies for pulmonary fluid disorders.
