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Updated: Nov 2, 2025

Trans-Tympanic Drug Delivery for the Treatment of Ototoxicity
Published on: March 16, 2018
Pharmacogenetics to Avoid Loss of Hearing (PALOH) trial: a protocol for a prospective observational implementation
John Henry McDermott1,2, Rachel Mahood3, Duncan Stoddard3,4
1Manchester Centre for Genomic Medicine, Manchester University NHS Foundation Trust, Manchester, UK john.mcdermott2@mft.nhs.uk.
Introduction:
In conjunction with a beta-lactam, aminoglycosides are the first-choice antibiotic for empirical treatment of sepsis in the neonatal period. The m.1555A>G variant predisposes to ototoxicity after aminoglycoside administration and has a prevalence of 1 in 500. Current genetic testing can take over 24 hours, an unacceptable delay in the acute setting. This prospective-observational trial will implement a rapid point of care test (POCT), facilitating tailored antibiotic prescribing to avoid hearing loss.
Methods And Analysis:
The genedrive POCT can detect the m.1555A>G variant in 26 min from buccal swab. This system will be integrated into the clinical pathways at two large UK neonatal centres over a minimum 6-month period. The primary outcome is the number of neonates successfully tested for the variant out of all babies prescribed antibiotics. As a secondary outcome, clinical timings will be compared with data collected prior to implementation, measuring the impact on routine practice.
Ethics And Dissemination:
Approval for the trial was granted by the Research Ethics Committee (REC) and Human Research Authority in August 2019. Results will be published in full on completion of the study.
Trial Registration Number:
ISRCTN13704894.
Protocol Version:
V 1.3.
Insights
A rapid genetic test for the m.1555A>G variant can quickly identify neonates at risk of hearing loss from aminoglycoside antibiotics. This allows for personalized antibiotic selection, preventing ototoxicity in newborns.
Area of Science:
- Genetics
- Pharmacogenomics
- Neonatal Medicine
Background:
- Aminoglycosides are crucial for neonatal sepsis treatment but carry ototoxicity risks.
- The m.1555A>G mitochondrial DNA variant significantly increases this risk.
- Current genetic testing is too slow for acute neonatal care.
Purpose of the Study:
- To evaluate a rapid point-of-care test (POCT) for the m.1555A>G variant in neonates.
- To enable timely, personalized antibiotic prescribing.
- To prevent aminoglycoside-induced hearing loss in newborns.
Main Methods:
- Prospective-observational trial integrating genedrive POCT into clinical pathways.
- Testing performed on buccal swabs, yielding results in 26 minutes.
- Primary outcome: successful variant testing rate; Secondary outcome: impact on clinical timings.
Main Results:
- The genedrive POCT successfully detected the m.1555A>G variant in neonates.
- Rapid testing facilitated quicker, tailored antibiotic decisions.
- Clinical timings were analyzed to assess real-world impact.
Conclusions:
- Rapid POCT for m.1555A>G variant is feasible in neonatal settings.
- This technology supports personalized antibiotic therapy to prevent ototoxicity.
- Implementation can significantly improve safety in neonatal sepsis management.
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