Emerging Electrophysiological Technologies for Assessing Ocular Toxicity in Laboratory Animals

James N.Ver Hoeve, Robert J. Munger, Christopher J. Murphy, T. Michael Nork

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The previous chapter on emerging imaging technologies emphasized new or improved devices that, for the most part, provide anatomic information about the living eye. In this chapter, we will review electrophysiological measures of ocular function. Functional assessment can often confirm and strengthen the anatomical findings. For example, in establishing early hydroxychloroquine (Plaquenil®) toxicity in humans, spectral domain optical coherence tomography (sdOCT) and multifocal electroretinography (mfERG) are frequently used together. Sometimes imaging can provide the most sensitive toxicologic test, such as may be the case for vitreous fluorophotometry and fluorescein angiography in detecting subtle breakdown of the blood-retinal barrier. At other times, functional measures may be the most sensitive. An example from clinical medicine is retinitis pigmentosa, which, early on, may produce only vague subjective symptoms in patients with normal appearing fundi but show a markedly reduced full-field ERG (ffERG). Since the animals used in preclinical toxicologic testing cannot communicate their visual symptoms, a combination of anatomic and functional measures is needed to definitively rule out injury to the visual system.

Original languageEnglish (US)
Title of host publicationMolecular and Integrative Toxicology
PublisherSpringer Science+Business Media B.V.
Pages123-157
Number of pages35
DOIs
StatePublished - 2013

Publication series

NameMolecular and Integrative Toxicology
ISSN (Print)2168-4219
ISSN (Electronic)2168-4235

Keywords

  • Flash Visual Evoke Potential
  • Optic Nerve Hypoplasia
  • Pattern Visual Evoke Potential
  • Retinal Function
  • Visual Evoke Potential

ASJC Scopus subject areas

  • Immunology and Allergy
  • Pharmacology (medical)
  • Drug Discovery
  • Toxicology

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