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Updated: Jul 12, 2025

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Published on: June 23, 2015
The genetic spectrum of polycystic kidney disease in children
Ayca Kocaaga1, Yesim Özdemir Atikel2, Mehtap Sak3
1Eskisehir City Hospital, Department of Medical Genetics - Eskişehir, Turkey.
Insights
This study identified novel genetic variants in Turkish children with polycystic kidney disease (PKD). These findings enhance the molecular understanding of PKD and aid in clinical diagnosis and prognosis.
Area of Science:
- Genetics
- Pediatrics
- Nephrology
Background:
- Polycystic kidney disease (PKD) encompasses autosomal dominant and recessive forms, caused by mutations in specific genes.
- Autosomal recessive PKD presents severely with enlarged kidneys and congenital hepatic fibrosis, linked to PKHD1 gene mutations.
- Autosomal dominant PKD involves mutations in polycystin-1 or polycystin-2.
Purpose of the Study:
- To investigate the genetic basis of polycystic kidney disease in Turkish children.
- To identify novel genetic variants associated with PKD in this pediatric cohort.
- To contribute to improved clinical diagnosis and prognosis of PKD through molecular characterization.
Main Methods:
- Retrospective evaluation of 28 children diagnosed with PKD between October 2020 and May 2022.
- Diagnosis confirmed via family history, ultrasound, and genetic analysis.
- Comprehensive genetic analysis of polycystin-1 and polycystin-2 genes.
Main Results:
- Genetic analysis revealed polycystin-1 variants in 13 patients and polycystin-2 variants in 7 patients.
- Eight novel pathogenic or likely pathogenic variants were identified among 18 total variants in polycystin-1 and polycystin-2.
- No variants were detected in the PKHD1 gene in any of the studied patients.
Conclusions:
- The study highlights the molecular genetic landscape of PKD in Turkish children.
- Novel genetic variations were identified, offering potential for enhanced clinical diagnosis and prognosis.
- Further research into these variants can refine understanding and management of pediatric PKD.
Objective:
Autosomal dominant polycystic kidney disease is an inherited kidney disorder with mutations in polycystin-1 or polycystin-2. Autosomal recessive polycystic kidney disease is a severe form of polycystic kidney disease that is characterized by enlarged kidneys and congenital hepatic fibrosis. Mutations at PKHD1 are responsible for all typical forms of autosomal recessive polycystic kidney disease.
Methods:
We evaluated the children diagnosed with polycystic kidney disease between October 2020 and May 2022. The diagnosis was established by family history, ultrasound findings, and/or genetic analysis. The demographic, clinical, and laboratory findings were evaluated retrospectively.
Results:
There were 28 children (male/female: 11:17) evaluated in this study. Genetic analysis was performed in all patients (polycystin-1 variants in 13, polycystin-2 variants in 7, and no variants in 8 patients). A total of 18 variants in polycystin-1 and polycystin-2 were identified and 9 (50%) of them were not reported before. A total of eight novel variants were identified as definite pathogenic or likely pathogenic mutations. There was no variant detected in the PKDH1 gene.
Conclusion:
Our results highlighted molecular features of Turkish children with polycystic kidney disease and demonstrated novel variations that can be utilized in clinical diagnosis and prognosis.
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