Phototoxicity of chlorpromazine on retinal pigment epithelial cells.

Abstract:

:As it is known that chlorpromazine (CPZ) can bind to melanins as well as cause ocular phototoxicity, we investigated the cytotoxic effects of UV-visible irradiation of melanotic and amelanotic retinal pigment epithelial (RPE) cells in the presence of CPZ. At low concentrations (5 micrograms/ml) of CPZ a photosensitization reaction took place which lysed the cells as measured by the release of 51Cr from cells labelled with chromium. At concentrations of CPZ less than 5 micrograms/ml, no significant cell lysis occurred when the cells were incubated at 37 degrees C in the dark. As the concentration of CPZ was increased to 25 micrograms/ml or more, high percentages of cells were lysed. When the melanotic RPE cells were exposed to different concentrations of CPZ and grown in culture, the cell growth (multiplication) diminished drastically with low concentrations (less than 2 micrograms/ml CPZ). Vitamin E decreased the cell lysis both in the dark and upon irradiation. Oxygen radical scavengers such as glutathione, B-carotene, mannitol, D-penicillamine as well as superoxide dismutase and catalase did not decrease cell lysis. The phototoxic effects of CPZ was found not to be due to stable photoproducts formed during irradiation of CPZ.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Persad S,Menon IA,Basu PK,Carre F

doi

10.3109/02713688809047014

subject

Has Abstract

pub_date

1988-01-01 00:00:00

pages

1-9

issue

1

eissn

0271-3683

issn

1460-2202

journal_volume

7

pub_type

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