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Auditory and vestibular phenotypes associated with GATA3 mutation.

Wade Wei-De Chien1, Jennifer W Leiding, Amy P Hsu

  • 1*National Institute on Deafness and Other Communication Disorders, and †National Institute on Allergy and Infectious Diseases, National Institutes of Health, Bethesda; and ‡Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, U.S.A.

Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [And] European Academy of Otology and Neurotology
|March 14, 2014
PubMed
Summary

Patients with GATA3 mutations experience early-onset sensorineural hearing loss (SNHL) and outer hair cell dysfunction. Vestibular function, however, remains normal in these individuals.

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Area of Science:

  • Genetics and Molecular Biology
  • Otolaryngology
  • Nephrology

Background:

  • GATA3 mutations are associated with a syndrome including hypoparathyroidism, hearing loss, and renal dysplasia.
  • Understanding the full spectrum of GATA3-related phenotypes is crucial for comprehensive patient management.

Observation:

  • A case series of six adult patients with confirmed heterozygous GATA3 mutations was studied.
  • All patients presented with the classic triad of GATA3 deficiency.
  • Auditory and vestibular function were assessed using audiometry, DPOAEs, ABRs, and rotational chair testing.

Findings:

  • All patients exhibited childhood-onset sensorineural hearing loss (SNHL) with a mean pure tone average of 67 dB HL.
  • Distortion product otoacoustic emissions (DPOAEs) were absent in all participants, indicating outer hair cell dysfunction.
  • Auditory brainstem responses (ABRs) were robust, showing no retrocochlear pathology. Vestibular testing was normal in all evaluated patients.

Implications:

  • GATA3 mutations lead to early-onset SNHL with specific cochlear dysfunction.
  • Genetic testing for GATA3 mutations should be considered in patients with this triad of symptoms.
  • Further research can explore genotype-phenotype correlations for GATA3 mutations and hearing loss.