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The role of regulated CFTR trafficking in epithelial secretion
- Source :
- American Journal of Physiology-Cell Physiology. 285:C1-C18
- Publication Year :
- 2003
- Publisher :
- American Physiological Society, 2003.
-
Abstract
- The focus of this review is the regulated trafficking of the cystic fibrosis transmembrane conductance regulator (CFTR) in distal compartments of the protein secretory pathway and the question of how changes in CFTR cellular distribution may impact on the functions of polarized epithelial cells. We summarize data concerning the cellular localization and activity of CFTR and attempt to synthesize often conflicting results from functional studies of regulated endocytosis and exocytosis in CFTR-expressing cells. In some instances, findings that are inconsistent with regulated CFTR trafficking may result from the use of overexpression systems or nonphysiological experimental conditions. Nevertheless, judging from data on other transporters, an appropriate cellular context is necessary to support regulated CFTR trafficking, even in epithelial cells. The discovery that disease mutations can influence CFTR trafficking in distal secretory and recycling compartments provides support for the concept that regulated CFTR recycling contributes to normal epithelial function, including the control of apical CFTR channel density and epithelial protein secretion. Finally, we propose molecular mechanisms for regulated CFTR endocytosis and exocytosis that are based on CFTR interactions with other proteins, particularly those whose primary function is membrane trafficking. These models provide testable hypotheses that may lead to elucidation of CFTR trafficking mechanisms and permit their experimental manipulation in polarized epithelial cells.
- Subjects :
- congenital, hereditary, and neonatal diseases and abnormalities
Membrane Traffic
Physiology
Cystic Fibrosis Transmembrane Conductance Regulator
Epithelial Cells
Cell Biology
respiratory system
Biology
digestive system diseases
Cystic fibrosis transmembrane conductance regulator
respiratory tract diseases
Epithelial secretion
Cell biology
Protein Transport
Secretory protein
Chloride channel
biology.protein
Animals
Humans
Secretory pathway
Subjects
Details
- ISSN :
- 15221563 and 03636143
- Volume :
- 285
- Database :
- OpenAIRE
- Journal :
- American Journal of Physiology-Cell Physiology
- Accession number :
- edsair.doi.dedup.....f4c662c9fb97a782fb00f6b2055f3da7