Related Experiment Video
Updated: May 19, 2026
Guinea Pig Round Window Membrane Explantation for Ex Vivo Studies
Published on: February 23, 2024
Ototoxicity of cisplatin administered to guinea pigs via the round window membrane
Abstract:
Animal models of ototoxicity represent an elementary tool in otolaryngologic research. Such models are usually created via the consecutive injection of ototoxic drugs or the co-administration of ethacrynic acid and low-dose ototoxic drugs. Injection via the round window membrane (RWM) is one approach that allows for local drug delivery into the inner ear. In this study, 47 guinea pigs received an injection of varying doses of cisplatin via the RWM, and data concerning the animals' auditory brainstem responses, hair cells, and spiral ganglion neurons were analyzed. Our results indicate the high efficiency and generally small reaction of the subjects, suggesting that the application of cisplatin via the RWM is an effective animal model for ototoxicity research.
Insights
Cisplatin delivered via the round window membrane (RWM) effectively models ototoxicity in guinea pigs. This method offers an efficient approach for inner ear drug delivery research.
Area of Science:
- Otolaryngology
- Neuroscience
- Pharmacology
Background:
- Animal models are crucial for studying ototoxicity in the inner ear.
- Current models often involve systemic drug administration or complex co-administration protocols.
- Local drug delivery via the round window membrane (RWM) offers a targeted approach.
Discussion:
- This study evaluated cisplatin delivery through the RWM in 47 guinea pigs.
- Auditory brainstem responses, hair cell counts, and spiral ganglion neuron survival were analyzed.
- Results demonstrate the efficacy of RWM cisplatin injection for ototoxicity modeling.
Key Insights:
- Round window membrane (RWM) injection of cisplatin is an efficient method for inducing ototoxicity.
- This localized delivery minimizes systemic exposure and animal distress.
- The model effectively impacts auditory function and sensory structures.
Outlook:
- This refined animal model facilitates further research into ototoxic mechanisms.
- It supports the development of protective strategies against hearing loss.
- Further studies can explore varying cisplatin concentrations and delivery durations.
