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ADPKD-Causing Missense Variants in Polycystin-1 Disrupt Cell Surface Localization or Polycystin Channel Function

Ha, K.; Loeb, G. B.; Park, M.; Pinedo, A.; Park, C. H.; Brandes, N.; Ritu, F.; Ye, C. J.; Reiter, J. F.; Delling, M.

2023-12-07 cell biology Community evaluation
10.1101/2023.12.04.570035 bioRxiv
Show abstract

Autosomal dominant polycystic kidney disease (ADPKD) is the leading monogenic cause of kidney failure and affects millions of people worldwide. Despite the prevalence of this monogenic disorder, our limited mechanistic understanding of ADPKD has hindered therapeutic development. Here, we successfully developed bioassays that functionally classify missense variants in polycystin-1 (PC1). Strikingly, ADPKD pathogenic missense variants cluster into two major categories: 1) those that disrupt polycystin cell surface localization or 2) those that attenuate polycystin ion channel activity. We found that polycystin channels with defective surface localization could be rescued with a small molecule. We propose that small-molecule-based strategies to improve polycystin cell surface localization and channel function will be effective therapies for ADPKD patients.

Published in Journal of the American Society of Nephrology (predicted rank #1) · training set

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