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Related Experiment Videos

[Auditory brainstem responses in group A xeroderma pigmentosum].

J Sugimoto1, J Kohyama, M Shimohira

  • 1Department of Pediatrics, Faculty of Medicine, Tokyo Medical and Dental University.

No to Hattatsu = Brain and Development
|June 4, 1999
PubMed
Summary

Xeroderma pigmentosum group A (A-XP) patients exhibit progressive hearing loss, with auditory brainstem response abnormalities becoming apparent after age 4 and undetectable by age 10. Peripheral nerve involvement may precede central nervous system damage in A-XP.

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Area of Science:

  • Genetics and Molecular Biology
  • Neuroscience
  • Audiology

Context:

  • Xeroderma pigmentosum (XP) is a DNA repair disorder with 8 complementation groups.
  • Group A (A-XP) presents severe neurological impairment, including progressive hearing loss.
  • Chronological changes in hearing loss in A-XP patients are not well-documented.

Purpose:

  • To investigate the developmental trajectory of audiological abnormalities in Japanese children with A-XP.
  • To characterize auditory brainstem response (ABR) changes in relation to age in A-XP patients.

Summary:

  • Auditory brainstem evoked responses (ABRs) were recorded in 20 Japanese children with A-XP, all carrying common homozygous intron 3 splicing mutations.
  • ABR abnormalities became evident after 4 years of age, with no detectable ABRs by 10 years.

Related Experiment Videos

  • Peripheral nerve pathways may be affected earlier than central pathways involved in ABR generation in A-XP.

    • Impact:

    • This study provides crucial insights into the audiological progression of A-XP.
    • Findings highlight the importance of early audiological monitoring in A-XP patients.
    • The results suggest a potential link between peripheral nerve degeneration and central auditory pathway dysfunction in A-XP.