Related Experiment Video

Updated: Aug 15, 2026

Trans-Tympanic Drug Delivery for the Treatment of Ototoxicity
09:52

Trans-Tympanic Drug Delivery for the Treatment of Ototoxicity

Published on: March 16, 2018

Ototoxicity: therapeutic opportunities

Leonard P Rybak1, Craig A Whitworth

  • 1Department of Surgery, Southern Illinois University, School of Medicine, P.O. Box 19653, Springfield, IL 62794-9653, USA. lrybak@siumed.edu

Drug Discovery Today
|October 11, 2005
PubMed

Insights

Aminoglycoside antibiotics and platinum chemotherapy cause hearing loss by damaging inner ear hair cells. Antioxidant strategies aim to protect against this ototoxicity, but drug delivery and efficacy remain challenges.

Area of Science:

  • Ototoxicity research
  • Pharmacology
  • Cell biology

Background:

  • Aminoglycoside antibiotics and platinum-based chemotherapy are crucial drugs with ototoxicity as a significant side effect.
  • These drugs damage cochlear hair cells, leading to permanent hearing loss.
  • Reactive oxygen species (ROS) are implicated in the cell-death pathways activated by these drugs.

Purpose of the Study:

  • To explore strategies for preventing drug-induced hearing loss (ototoxicity).
  • To investigate the role of reactive oxygen species in ototoxicity.
  • To evaluate antioxidant and anti-apoptotic approaches for inner ear protection.

Main Methods:

  • Review of existing literature on ototoxicity mechanisms.
  • Analysis of antioxidant and downstream apoptosis inhibition strategies.
  • Discussion of drug delivery challenges to the inner ear.

Main Results:

  • Ototoxicity is mediated by reactive oxygen species, triggering cell-death cascades.
  • Antioxidant administration offers upstream protection against ototoxicity.
  • Downstream interruption of apoptosis can prevent further cell death.

Conclusions:

  • Protecting the inner ear from ototoxicity requires addressing reactive oxygen species and cell-death pathways.
  • Effective drug delivery to the cochlea is critical for therapeutic success.
  • Balancing ototoxicity prevention with the efficacy of essential antibiotics and chemotherapeutics is a key challenge.

More Related Videos

The Mouse Round-window Approach for Ototoxic Agent Delivery: A Rapid and Reliable Technique for Inducing Cochlear Cell Degeneration12:21

The Mouse Round-window Approach for Ototoxic Agent Delivery: A Rapid and Reliable Technique for Inducing Cochlear Cell Degeneration

Published on: November 26, 2015

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection09:18

A Comparative Study of Drug Delivery Methods Targeted to the Mouse Inner Ear: Bullostomy Versus Transtympanic Injection

Published on: March 8, 2017

Related Concept Videos

Pharmaceutical Poisoning: Treatment Strategies01:26

Pharmaceutical Poisoning: Treatment Strategies

Treatment strategies for poisoning are a critical aspect of emergency medicine, focusing on preventing the absorption of toxins and enhancing their elimination. When a poisoning incident occurs, the first response is to halt exposure and decontaminate the patient, particularly through gastrointestinal (GI) methods if the poison was ingested.Gastrointestinal Decontamination Techniques:Activated charcoal is the cornerstone of GI decontamination. It works through adsorption, binding the toxin to...
Therapeutic Drug Monitoring: Overview and Classification01:16

Therapeutic Drug Monitoring: Overview and Classification

Therapeutic Drug Monitoring (TDM) is a clinical practice that measures specific drug levels in a patient's blood at designated intervals to ensure the drug concentration stays within a therapeutic range. This monitoring is crucial for optimizing individual dosage regimens, enhancing therapeutic efficacy, and minimizing drug-related toxicity. TDM is vital for drugs with narrow therapeutic windows, significant variability in pharmacokinetics, and a clear correlation between plasma levels and...
Drug Toxicity: Overview01:00

Drug Toxicity: Overview

Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...
Heart Failure Drugs: Inotropic Agents01:26

Heart Failure Drugs: Inotropic Agents

Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...
Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
Therapeutic Drug Monitoring: Affecting Factors01:29

Therapeutic Drug Monitoring: Affecting Factors

Therapeutic Drug Monitoring (TDM) is the clinical practice of measuring specific drug levels in a patient's blood or body tissues to manage and optimize therapy. TDM is crucial for drugs with narrow therapeutic windows, like warfarin and phenytoin, where incorrect doses can lead to treatment failure or severe side effects. This monitoring ensures the dosage administered is within a safe and effective range. The factors affecting therapeutic drug monitoring include:Patient-Specific Factors:a.