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Alport syndrome: clinical update

D C Wester1, C L Atkin, M C Gregory

  • 1Department of Otolaryngology, Naval Medical Center San Diego, California 92134-5000.

Journal of the American Academy of Audiology
|January 1, 1995
PubMed
Summary

This review focuses on genetic and clinical aspects of sensorineural hearing loss in X-linked Alport syndrome (AS) types III and IV. It highlights key findings and future research directions in auditory genetics for AS patients.

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Area of Science:

  • Genetics
  • Otolaryngology
  • Medical Research

Background:

  • Alport syndrome (AS) is a genetic disorder affecting collagen, often leading to kidney disease, hearing loss, and eye abnormalities.
  • X-linked Alport syndrome (XLAS) is the most common form, with specific types (III and IV) linked to distinct clinical presentations.

Purpose of the Study:

  • To review the genetic and clinical issues associated with sensorineural hearing loss in type III and type IV X-linked Alport syndrome.
  • To consolidate current knowledge on the pathophysiology, diagnosis, and management of hearing impairment in AS.
  • To identify gaps and suggest future directions for auditory-genetic research in Alport syndrome.

Main Methods:

  • Comprehensive literature review of studies on Alport syndrome, focusing on genetic and clinical aspects of hearing loss.
  • Analysis of prevalence, medical comorbidities, genetic mutations, and audiologic and vestibular findings.
  • Examination of the pathophysiology of hearing loss in type III AS and age- and phenotype-specific normative data.

Main Results:

  • Sensorineural hearing loss is a significant clinical manifestation in type III and type IV X-linked Alport syndrome.
  • Genetic mutations in COL4A5 are primarily responsible for XLAS, influencing the severity and type of hearing loss.
  • Audiologic and vestibular findings vary based on genotype and disease progression, necessitating tailored monitoring.

Conclusions:

  • Understanding the genetic underpinnings of sensorineural hearing loss in AS is crucial for effective management.
  • Further research is needed to elucidate the precise mechanisms of auditory dysfunction and develop targeted therapies.
  • Longitudinal studies with age- and phenotype-specific data are essential for improving auditory care in Alport syndrome patients.

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