A model for light toxicity of cultured human retinal pigment epithelium

Timothy Olsen, Paul Sternberg, Robyn L. Reed, Dean P. Jones

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background: The effect of visible light on human retinal pigment epithelial (HRPE) cells has not been characterized under conditions that provide strict thermal control. Methods: HRPE cells were isolated and grown to confluence. Cells were exposed to light in an incubator in which the cell temperature was controlled in response to a temperature sensor maintained in the tissue culture medium. Cells were exposed: (A) for 24, 36, and 48 h; and using a 24-h exposure followed by 24 h darkness; (B) at varying intensities of light using neutral density filters; (C) under a yellow filter; and (D) with a 12-h on-off cyclic light. Results: (A) Light exposure of 36 and 48 h resulted in significant cytotoxicity, while the initial 24-h exposure did not induce subsequent cytotoxicity. (B) Light irradiance levels from 43 to 54 mW/cm2 were required to demonstrate cytotoxicity. (C) Use of a yellow filter did not eliminate the observed cytotoxicity. (D) Cyclic exposure did not result in significant cytotoxicity. Conclusion: This study establishes a model and basic parameters of light toxicity to HRPE cells in vitro using strict temperature control that may be used to evaluate photochemical injury to HRPE cells.

Original languageEnglish (US)
Pages (from-to)111-117
Number of pages7
JournalGraefe's Archive for Clinical and Experimental Ophthalmology
Volume235
Issue number2
DOIs
StatePublished - Feb 25 1997
Externally publishedYes

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Retinal Pigment Epithelium
Retinal Pigments
Light
Epithelial Cells
Temperature
Incubators
Darkness
Culture Media
Hot Temperature
Wounds and Injuries

ASJC Scopus subject areas

  • Ophthalmology

Cite this

A model for light toxicity of cultured human retinal pigment epithelium. / Olsen, Timothy; Sternberg, Paul; Reed, Robyn L.; Jones, Dean P.

In: Graefe's Archive for Clinical and Experimental Ophthalmology, Vol. 235, No. 2, 25.02.1997, p. 111-117.

Research output: Contribution to journalArticle

Olsen, Timothy ; Sternberg, Paul ; Reed, Robyn L. ; Jones, Dean P. / A model for light toxicity of cultured human retinal pigment epithelium. In: Graefe's Archive for Clinical and Experimental Ophthalmology. 1997 ; Vol. 235, No. 2. pp. 111-117.
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