Removal of sodium from the solvent reduces retinal pigment epithelium toxicity caused by indocyanine green: Implications for macular hole surgery

J. D. Ho, Jui-Fang Tsai, S. N. Chen, H. C. Chen

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Backgrounds/aims: Staining of internal limiting membrane with indocyanine green (ICG) has been reported to be associated with postoperative atrophic retinal pigment epithelium (RPE) change. Here the authors examined whether removing sodium from the solvent reduces ICG induced RPE cytotoxicity. Methods: Human RPE cells were exposed to ICG (0.25 and 0.025 mg/ml) reconstituted with balanced salt solution (BSS) or Na+ free BSS. Light microscopy, trypan blue dye exclusion, acridine orange/ethidium bromide staining, and DNA electrophoresis were used to evaluate the cytotoxic effects of ICG. ICG uptake was measured by optical absorption at 790 nm. Results: Sodium removal reduced the ICG induced changes in cell morphology and improved the RPE cell viability. When RPE cells were incubated for 4 hours in 0.25 mg/ml ICG dissolved in BSS and sodium free BSS, 86.3% (SD 6.7%) and 2.4% (1.1%) of the cells were stained with trypan blue, respectively. After ICG treatment, RPE dies mainly through a necrotic mechanism. ICG uptake by RPE was also reduced with sodium removal. Conclusions: ICG induced cytotoxicity in cultured human RPE was reduced with removal of sodium from the solvent. This reconstitution method may provide a safer intravitreal use of ICG in macular hole surgery.

Original languageEnglish
Pages (from-to)556-559
Number of pages4
JournalBritish Journal of Ophthalmology
Volume88
Issue number4
DOIs
Publication statusPublished - Apr 2004

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Retinal Perforations
Indocyanine Green
Retinal Pigment Epithelium
Sodium
Salts
Trypan Blue
Staining and Labeling
Acridine Orange
Ethidium
Electrophoresis
Microscopy
Cell Survival
Coloring Agents

ASJC Scopus subject areas

  • Ophthalmology

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Removal of sodium from the solvent reduces retinal pigment epithelium toxicity caused by indocyanine green : Implications for macular hole surgery. / Ho, J. D.; Tsai, Jui-Fang; Chen, S. N.; Chen, H. C.

In: British Journal of Ophthalmology, Vol. 88, No. 4, 04.2004, p. 556-559.

Research output: Contribution to journalArticle

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