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Related Experiment Videos

Developmental ototoxicity

C M Henley1, L P Rybak

  • 1Baylor College of Medicine, Houston, Texas.

Otolaryngologic Clinics of North America
|October 1, 1993
PubMed
Summary
This summary is machine-generated.

Aminoglycoside antibiotics, crucial for bacterial infections, can cause ototoxicity, especially in developing infants. Further research is needed to understand the molecular mechanisms of this hypersensitivity.

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Area of Science:

  • Pharmacology
  • Toxicology
  • Oto-toxicology

Background:

  • Aminoglycoside antibiotics are vital for treating tuberculosis and Gram-negative bacterial infections, with over 2 million patients annually.
  • A significant drawback of aminoglycosides is their potential for ototoxicity (cochleotoxicity and vestibulotoxicity), nephrotoxicity, and neuromuscular blockade.
  • Ototoxicity can affect all patient groups, including adults, fetuses, and neonates.

Purpose of the Study:

  • To review the factors contributing to aminoglycoside-induced ototoxicity.
  • To highlight the heightened sensitivity of preterm infants and developing animals to aminoglycoside ototoxicity.
  • To discuss the ototoxic risks associated with combined aminoglycoside and loop diuretic therapy.

Main Methods:

  • Literature review of studies on aminoglycoside toxicity.

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  • Analysis of factors influencing ototoxicity, including age, dose, duration, genetics, and drug class.
  • Examination of developmental hypersensitivity in animal models and human neonates.

    • Main Results:

    • Preterm infants and experimental animals exhibit hypersensitivity to aminoglycoside ototoxicity during inner ear maturation.
    • Developing organisms show increased susceptibility to loop diuretics and a synergistic ototoxic effect when combined with aminoglycosides.
    • Ototoxicity is multifactorial, influenced by age, patient population, dosage, duration, genetics, and specific aminoglycoside used.

    Conclusions:

    • Aminoglycoside ototoxicity is a significant clinical concern across diverse patient populations.
    • Developmental hypersensitivity to aminoglycosides, particularly in neonates, warrants careful consideration.
    • The precise molecular mechanisms underlying developmental hypersensitivity to aminoglycosides remain undetermined and require further investigation.