A simple optical coherence tomography quantification method for choroidal neovascularization

Rania S. Sulaiman, Judith Quigley, Xiaoping Qi, Michael N. O'Hare, Maria B. Grant, Michael E. Boulton, Timothy Corson

Research output: Contribution to journalArticle

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Abstract

Purpose: Therapeutic efficacy is routinely assessed by measurement of lesion size using flatmounted choroids and confocal microscopy in the laser-induced choroidal neovascularization (L-CNV) rodent model. We investigated whether optical coherence tomography (OCT) quantification, using an ellipsoid volume measurement, was comparable to standard ex vivo evaluation methods for this model and whether this approach could be used to monitor treatment-related lesion changes. Methods: Bruch's membrane was ruptured by argon laser in the dilated eyes of C57BL/6J mice, followed by intravitreal injections of anti-VEGF164 or vehicle, or no injection. In vivo OCT images were acquired using Micron III or InVivoVue systems at 7, 10, and/or 14 days post-laser and neovascular lesion volume was calculated as an ellipsoid. Subsequently, lesion volume was compared to that calculated from confocal Z-stack images of agglutinin-stained choroidal flatmounts. Results: Ellipsoid volume measurement of orthogonal 2-dimensional OCT images obtained from different imaging systems correlated with ex vivo lesion volumes for L-CNV (Spearman's ρ=0.82, 0.75, and 0.82 at days 7, 10, and 14, respectively). Ellipsoid volume calculation allowed temporal monitoring and evaluation of CNV lesions in response to antivascular endothelial growth factor treatment. Conclusions: Ellipsoid volume measurements allow rapid, quantitative use of OCT for the assessment of CNV lesions in vivo. This novel method can be used with different OCT imaging systems with sensitivity to distinguish between treatment conditions. It may serve as a useful adjunct to the standard ex vivo confocal quantification, to assess therapeutic efficacy in preclinical models of CNV, and in models of other ocular diseases.

Original languageEnglish (US)
Pages (from-to)447-454
Number of pages8
JournalJournal of Ocular Pharmacology and Therapeutics
Volume31
Issue number8
DOIs
StatePublished - Oct 1 2015

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Choroidal Neovascularization
Optical Coherence Tomography
Lasers
Endothelial Growth Factors
Bruch Membrane
Therapeutics
Intravitreal Injections
Choroid
Eye Diseases
Agglutinins
Argon
Inbred C57BL Mouse
Confocal Microscopy
Rodentia
Injections

ASJC Scopus subject areas

  • Pharmacology (medical)
  • Ophthalmology
  • Pharmacology

Cite this

A simple optical coherence tomography quantification method for choroidal neovascularization. / Sulaiman, Rania S.; Quigley, Judith; Qi, Xiaoping; O'Hare, Michael N.; Grant, Maria B.; Boulton, Michael E.; Corson, Timothy.

In: Journal of Ocular Pharmacology and Therapeutics, Vol. 31, No. 8, 01.10.2015, p. 447-454.

Research output: Contribution to journalArticle

Sulaiman, Rania S. ; Quigley, Judith ; Qi, Xiaoping ; O'Hare, Michael N. ; Grant, Maria B. ; Boulton, Michael E. ; Corson, Timothy. / A simple optical coherence tomography quantification method for choroidal neovascularization. In: Journal of Ocular Pharmacology and Therapeutics. 2015 ; Vol. 31, No. 8. pp. 447-454.
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