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Related Experiment Videos

Normal cochlear function in mdx and mdx(Cv3) Duchenne muscular dystrophy mouse models.

D A Pillers1, N M Duncan, S J Dwinnell

  • 1Department of Pediatrics, Oregon Child Health Research Center, Doernbecher Children's Hospital, Oregon Health Sciences University, Portland 97201-3042, USA. pillersd@ohsu.edu

The Laryngoscope
|August 12, 1999
PubMed
Summary

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This study found that mdx and mdx(Cv3) mice, models for muscular dystrophy, have normal hearing. Dystrophin and its isoforms do not appear critical for mouse hearing, contrary to previous suggestions.

Area of Science:

  • Neuroscience
  • Genetics
  • Auditory Science

Background:

  • Sensorineural hearing loss is linked to inherited muscular dystrophies.
  • Previous studies suggested dystrophin deficiency impacts hearing in mdx mice.

Purpose of the Study:

  • Confirm cochlear dysfunction in mdx mice.
  • Investigate the role of dystrophin isoforms in hearing.

Main Methods:

  • Auditory Brainstem Response (ABR) audiometry used in mdx, mdx(Cv3), and control mice.
  • Tested hearing thresholds at various frequencies (4-32 kHz) at 5 and 11 weeks.
  • Statistical analysis (ANOVA) compared group differences.

Main Results:

  • mdx and mdx(Cv3) mice showed normal ABR thresholds compared to controls.

Related Experiment Videos

  • No significant hearing impairment was detected in either mouse model.

    • Conclusions:

    • Dystrophin and its carboxyl terminus isoforms are not critical for normal hearing in mice.
    • Findings contradict previous research suggesting hearing deficits in mdx mice.