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How Does ADPKD Severity Differ Between Family Members?

Klement C Yeung1, Elise Fryml2, Matthew B Lanktree3,4,5,6

  • 1Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.

Kidney International Reports
|May 6, 2024
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Summary
This summary is machine-generated.

Autosomal dominant polycystic kidney disease (ADPKD) severity varies within families due to genetic background, environmental factors like diet and smoking, and comorbid conditions. Addressing these modifiable factors is crucial for managing ADPKD.

Keywords:
ADPKDgeneticsincomplete penetranceintrafamilial discordancepolycystic kidney diseasevariable expressivity

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Area of Science:

  • Nephrology
  • Genetics
  • Internal Medicine

Background:

  • Autosomal dominant polycystic kidney disease (ADPKD) is a common genetic disorder characterized by kidney cyst formation.
  • While a causal variant is shared among affected family members, significant variability in disease severity exists within families.
  • Understanding factors contributing to this discordance is essential for personalized patient management.

Purpose of the Study:

  • To review and synthesize the known contributors to intrafamilial phenotypic variability in ADPKD.
  • To highlight the roles of genetic background, environmental exposures, and comorbid conditions in ADPKD severity.

Main Methods:

  • This is a narrative review based on existing literature.
  • Key factors influencing ADPKD phenotype variability were identified and discussed.

Main Results:

  • Within-family ADPKD severity discordance is influenced by genetic factors (biallelic/digenic inheritance, genetic background) and non-genetic factors.
  • Environmental exposures (diet, smoking, alcohol, salt, protein intake) significantly impact disease progression.
  • Comorbid conditions such as obesity, diabetes, hypertension, and other kidney diseases exacerbate ADPKD severity.

Conclusions:

  • Phenotypic variability in ADPKD among family members is multifactorial.
  • Many contributing factors are modifiable and treatable, emphasizing the need for awareness and intervention by healthcare providers and patients.
  • Addressing these factors can potentially improve ADPKD management and outcomes.