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Trans-Tympanic Drug Delivery for the Treatment of Ototoxicity
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Aminoglycosides: therapeutics, ototoxicity and hypersensitivity of mitochondrial genetic origin

N M Torres-Ruíz1, O Granados, G Meza

  • 1Departamento Neuropatología Molecular, Instituto de Fisiologio Celular, UNAM.

Proceedings of the Western Pharmacology Society
|March 20, 2012
PubMed

Insights

Aminoglycoside antibiotics can cause hearing loss due to genetic mutations. Researchers developed a method to identify these mutations in Mexican patients, aiming to prevent ototoxicity and recommend alternative treatments.

Area of Science:

  • Pharmacogenomics
  • Ototoxicology
  • Molecular Biology

Background:

  • Aminoglycosides, like streptomycin, are vital for treating infections such as tuberculosis.
  • Ototoxicity, including hearing loss and balance issues, is a significant side effect of prolonged aminoglycoside use.
  • A specific mitochondrial 12S rRNA gene mutation predisposes individuals to sudden deafness from aminoglycosides.

Purpose of the Study:

  • To investigate the prevalence of aminoglycoside-associated ototoxicity-related genetic mutations in the Mexican population.
  • To develop a screening method for identifying at-risk individuals.
  • To enable personalized treatment recommendations to prevent aminoglycoside-induced ototoxicity.

Main Methods:

  • Analysis of mitochondrial 12S rRNA gene in Mexican individuals.
  • Liquid chromatography to detect streptidine metabolite in elder patients.
  • Development of a simple method for identifying the specific mitochondrial gene mutation.

Main Results:

  • Only one case of the relevant mitochondrial gene polymorphism was detected in over 60 Mexican individuals analyzed.
  • The identified polymorphism was found in a patient treated with streptomycin.
  • A simple method for identifying the mutation in a larger population was successfully developed.

Conclusions:

  • The prevalence of this specific ototoxicity-related mutation appears low in the studied Mexican population.
  • The developed screening method can facilitate the identification of individuals susceptible to aminoglycoside ototoxicity.
  • This research paves the way for personalized treatment strategies to mitigate hearing loss in susceptible patients.

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