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Polycystic kidney disease: novel insights into polycystin function
Lingfei Luo1, Sudipto Roy2, Li Li3
1Institute of Developmental Biology and Regenerative Medicine, Southwest University, Beibei, Chongqing, 400715, China.
Trends in Molecular Medicine
|February 22, 2023
Summary
Autosomal dominant polycystic kidney disease (ADPKD) is caused by mutations affecting polycystin proteins (PC1/2). Restoring PC function in cysts can reverse ADPKD, offering new therapeutic avenues.
Area of Science:
- Nephrology
- Genetics
- Cell Biology
Background:
- Autosomal dominant polycystic kidney disease (ADPKD) is a severe monogenic disorder.
- Mutations in PKD1 and PKD2 genes lead to polycystin 1 (PC1) and polycystin 2 (PC2) deficiency.
- PC1/2 proteins are crucial for regulating renal epithelial cell cilia function.
Purpose of the Study:
- To review recent research on polycystin function in ADPKD.
- To explore novel therapeutic strategies for ADPKD based on polycystin research.
- To understand the role of polycystins in suppressing cilia-dependent cyst activation (CDCA).
Main Methods:
- Review of recent scientific literature on ADPKD and polycystin function.
- Analysis of studies investigating the mechanism of PC1/2 in cilia.
- Examination of research demonstrating cyst reversal upon PC re-expression.
Main Results:
- PC1/2 normally inhibit the CDCA signal, maintaining renal lumen diameter.
- PC deficiency activates CDCA, promoting cystogenesis in ADPKD.
- Re-expression of PCs in existing cysts has shown potential to reverse PKD progression.
Conclusions:
- The function of PCs is akin to a 'counterbalance in cruise control' for kidney cyst regulation.
- Novel therapeutic targets for ADPKD are emerging from polycystin research.
- Future research directions hold promise for effective ADPKD treatments.
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