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Related Experiment Videos

The usher syndromes.

B J Keats1, D P Corey

  • 1Department of Biometry and Genetics, LSU Medical Center, New Orleans, LA 70112, USA. biombjk@lsumc.edu

American Journal of Medical Genetics
|March 7, 2000
PubMed
Summary
This summary is machine-generated.

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Mutations in MYO7A and USH2A genes cause Usher syndrome (USH), a genetic disorder affecting hearing and vision. Research into these genes and others advances understanding and potential therapies for USH.

Area of Science:

  • Genetics
  • Ophthalmology
  • Otolaryngology

Background:

  • Usher syndrome (USH) is a clinically heterogeneous autosomal recessive disorder characterized by hearing and visual impairment.
  • Mutations in MYO7A and USH2A genes are known causes of USH, with varying phenotypes.
  • Different subtypes of USH (USH1, USH2, USH3) present with distinct audiological, vestibular, and ophthalmological features.

Purpose of the Study:

  • To review the genetic basis of Usher syndrome, focusing on mutations in MYO7A and USH2A.
  • To describe the clinical heterogeneity and phenotypic variability associated with these gene mutations.
  • To highlight the ongoing research into USH genes and their potential for therapeutic development.

Main Methods:

  • Review of genetic mutations and their correlation with clinical phenotypes in Usher syndrome.

Related Experiment Videos

  • Analysis of gene mapping data for identified and unidentified Usher syndrome genes.
  • Utilizing the shaker-1 (sh1) mouse model for functional studies of myosin-VIIa.

    • Main Results:

    • Mutations in MYO7A cause USH1, nonsyndromic hearing impairment, and rare USH3 phenotypes.
    • USH2A mutations are associated with USH2 and atypical Usher syndrome presentations.
    • MYO7A and USH2A genes are located on chromosomes 11q13 and 1q41, respectively, with other USH genes mapped to various chromosomal locations.

    Conclusions:

    • Understanding the function of myosin-VIIa and USH2A protein is crucial for deciphering Usher syndrome pathogenesis.
    • Further research into all identified and unidentified USH genes is essential for comprehensive understanding.
    • Advances in studying these genes hold promise for developing effective therapies for Usher syndrome.