Kunzelmann, Karl and Centeio, Raquel and Ousingsawat, Jiraporn and Talbi, Khaoula and Seidler, Ursula and Schreiber, Rainer (2023) SLC26A9 in airways and intestine: secretion or absorption? CHANNELS, 17 (1): 2186434. ISSN 1933-6950, 1933-6969
Full text not available from this repository. (Request a copy)Abstract
SLC26A9 is one out of 11 proteins that belong to the SLC26A family of anion transporters. Apart from expression in the gastrointestinal tract, SLC26A9 is also found in the respiratory system, in male tissues and in the skin. SLC26A9 has gained attention because of its modifier role in the gastrointestinal manifestation of cystic fibrosis (CF). SLC26A9 appears to have an impact on the extent of intestinal obstruction caused by meconium ileus. SLC26A9 supports duodenal bicarbonate secretion, but was assumed to provide a basal Cl- secretory pathway in airways. However, recent results show that basal airway Cl- secretion is due to cystic fibrosis conductance regulator (CFTR), while SLC26A9 may rather secrete HCO3-, thereby maintaining proper airway surface liquid (ASL) pH. Moreover, SLC26A9 does not secrete but probably supports reabsorption of fluid particularly in the alveolar space, which explains early death by neonatal distress in Slc26a9-knockout animals. While the novel SLC26A9 inhibitor S9-A13 helped to unmask the role of SLC26A9 in the airways, it also provided evidence for an additional role in acid secretion by gastric parietal cells. Here we discuss recent data on the function of SLC26A9 in airways and gut, and how S9-A13 may be useful in unraveling the physiological role of SLC26A9.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TRANSMEMBRANE CONDUCTANCE REGULATOR; CYSTIC-FIBROSIS GENE; SUBMUCOSAL GLANDS; ANION TRANSPORTERS; CHLORIDE SECRETION; CL-/HCO3-EXCHANGE; CFTR EXPRESSION; CELLS; BICARBONATE; MEMBRANE; Anoctamin; SLC26A9; epithelial transport; cystic fibrosis; asthma; inflammatory airway disease |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Physiologie > Prof. Dr. Karl Kunzelmann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Mar 2024 12:24 |
| Last Modified: | 05 Mar 2024 12:24 |
| URI: | https://pred.uni-regensburg.de/id/eprint/59325 |
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