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Updated: Jan 11, 2026

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Published on: April 4, 2018
De novo PKD1 splicing and missense variants in two familial ADPKD: Molecular characterization and genetic counseling
Juan Zhu1, Zi-Yan Xu2, Hong-Ping Yu2
1Department of Traditional Chinese Medicine and Nephrology and Neurology, Shengli Clinical Medical College of Fujian Medical University, Fuzhou University Affiliated Provincial Hospital, Fujian University of Traditional Chinese Medicine, Fuzhou, China; Affiliated Second People's Hospital, Fujian University of Traditional Chinese Medicine, Fuzhou, China.
Abstract:
This study identifies two pedigrees with autosomal dominant polycystic kidney disease (ADPKD) caused by de novo PKD1 variants. Proband A carried a heterozygous splicing variant (c.9202-16G > A), presenting with bilateral renal cysts. The miniGENE assay confirmed this variant causes aberrant splicing with a 60-base excision, leading to a frameshift and a predicted truncated protein. Proband B carried a missense variant (c.2180 T > C; p.Leu727Pro), presenting with polycystic kidney and liver disease. Structural modeling revealed this variant severely disrupts local secondary structure and a critical spatial interaction, compromising protein stability. Functional analyses demonstrate that both de novo variants are pathogenic through distinct mechanisms, implicating aberrant splicing and structural disruption in ADPKD etiology.
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