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Updated: Jul 13, 2026
07:35
Use of Ultra-high Field MRI in Small Rodent Models of Polycystic Kidney Disease for In Vivo Phenotyping and Drug Monitoring
Published on: June 23, 2015
A new conceptual framework for PKD1 in ADPKD; integrating DNA structures and inflammation
Leslyn A Hanakahi1, Tara Subrahmanyan2, Gregory B Vanden Heuvel2
1Department of Pharmaceutical Sciences, Retzky College of Pharmacy, University of Illinois Chicago, Rockford, IL, 61107, USA.
BMC Nephrology
|July 11, 2026
Summary
Autosomal dominant polycystic kidney disease (ADPKD) arises from PKD1 gene mutations. Guanine-rich sequences in human PKD1 increase mutation risk, potentially interacting with inflammation to drive cyst formation.
Area of Science:
- Genetics and Molecular Biology
- Nephrology
- Genomic Instability
Background:
- Autosomal dominant polycystic kidney disease (ADPKD) is characterized by renal cyst development.
- The PKD1 gene, encoding polycystin-1, is frequently disrupted in ADPKD.
- Mechanisms underlying recurrent somatic mutations in PKD1 are not fully understood.
Purpose of the Study:
- Investigate sequence- and structure-dependent mechanisms promoting somatic PKD1 inactivation.
- Explore why human PKD1 is susceptible to mutation compared to rodent orthologs.
- Integrate genetic susceptibility with the renal microenvironment in ADPKD pathogenesis.
Main Methods:
- Analysis of guanine-rich sequence architecture in human PKD1.
- Review of evidence linking DNA damage, secondary structures (G-quadruplexes), and replication/repair interference.
- Synthesis of mutagenesis principles with ADPKD cyst initiation mechanisms.
Main Results:
- Human PKD1 possesses guanine-rich tracts distinct from rodent Pkd1.
- These tracts are prone to oxidative damage and can form G-quadruplex DNA.
- Oxidized guanines and G-quadruplexes can impede DNA replication and repair, increasing mutation risk.
Conclusions:
- Intrinsic mutational susceptibility of the human PKD1 locus contributes to ADPKD.
- Interaction between sequence-dependent mutagenesis and inflammatory renal microenvironments may drive somatic second-hit events.
- Understanding these mechanisms offers insights into cyst initiation in ADPKD.
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