Journal
CURRENT PHARMACEUTICAL DESIGN
Volume 12, Issue 18, Pages 2235-2247Publisher
BENTHAM SCIENCE PUBL LTD
DOI: 10.2174/138161206777585148
Keywords
cystic fibrosis; CFTR; chloride channel; high-throughput screening; drug discovery; diarrhea; inhibitor; polycystic kidney disease
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Funding
- NEI NIH HHS [EY13574] Funding Source: Medline
- NHLBI NIH HHS [HL59198, HL73856] Funding Source: Medline
- NIBIB NIH HHS [EB00415] Funding Source: Medline
- NIDDK NIH HHS [DK35124, DK72517] Funding Source: Medline
- NATIONAL EYE INSTITUTE [R01EY013574] Funding Source: NIH RePORTER
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R01HL059198, R01HL073856] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [R01EB000415, R37EB000415] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK035124, R37DK035124, P30DK072517] Funding Source: NIH RePORTER
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The Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) is a cAMP-activated chloride channel expressed in epithelia in the lung, intestine, pancreas, testis and other tissues, where it facilitates transepithelial fluid transport. In the intestine CFTR provides the major route for chloride secretion in certain diarrheas. Mutations in CFTR cause the hereditary disease cystic fibrosis, where chronic lung infection and deterioration in lung function cause early death, CFTR is a well-validated targeted for development of inhibitors for therapy of secretory diarrheas and activators for therapy in cystic fibrosis. Our lab has identified and optimized small molecule inhibitors of CFTR, as well as activators of Delta F508-CFTR, the most common mutant CFTR causing cystic fibrosis. High-throughput screening of small molecule collections utilizing a cell-based fluorescence assay of halide transport yielded thiazolidinone' and glycine hydrazide CFTR inhibitors that block enterotoxin-mediated secretory diarrhea in rodent models, including a class of non-absorbable inhibitors that target the CFTR pore at its external entrance. Benzothiophene, phenylglycine and sulfonamide potentiators were identified that correct the defective gating of Delta F508-CFTR chloride channels, and other small molecules that correct its defective cellular processing. Small molecule modulators of CFTR function may be useful in the treatment of cystic fibrosis, secretory diarrhea and polycystic kidney disease.
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