Abstract
Drugs targeting aquaporins have broad potential clinical applications, including cancer, obesity, edema, glaucoma, skin diseases and others. The astrocyte water channel aquaporin-4 is a particularly compelling target because of its role of brain water movement, neuroexcitation and glia scarring, and because it is the target of pathogenic autoantibodies in the neuroinflammatory demyelinating disease neuromyelitis optica . There has been considerable interest in the identification of small molecule inhibitors of aquaporins, with various candidates emerging from testing of known ion transport inhibitors, as well as compound screening and computational chemistry. However, in general, the activity of reported aquaporin inhibitors has not been confirmed on retesting, which may be due to technical problems in water transport assays used in the original identification studies, and the challenges in modulating the activity of small, compact, pore-containing membrane proteins. We review here the state of the field of aquaporin-modulating small molecules and biologics, and the challenges and opportunities in moving forward.
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Acknowledgments
This work was supported by grants DK101373, DK35124, DK72517, EB00415, EY13574 and DK99803 from the National Institutes of Health, and grants from the Guthy-Jackson Charitable Foundation and the Cystic Fibrosis Foundation.
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Tradtrantip, L., Jin, BJ., Yao, X., Anderson, M.O., Verkman, A.S. (2017). Aquaporin-Targeted Therapeutics: State-of-the-Field. In: Yang, B. (eds) Aquaporins. Advances in Experimental Medicine and Biology, vol 969. Springer, Dordrecht. https://doi.org/10.1007/978-94-024-1057-0_16
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