Zinc induces catalase expression in cultured fetal human retinal pigment epithelial cells

Publisher Website
Google Scholar
Abstract
PURPOSE. We have previously shown that an experimental, low-zinc environment decreased catalase activity in cultured human fetal retinal pigment epithelial (RPE) cells. The purpose of this study was to investigate the effect of zinc supplementation on catalase expression in cultured human fetal RPE cells. METHODS. Confluent fetal RPE cells incubated in Coon's modified Ham's F12 (CMF-12) were treated (18 h) with zinc chloride (ZnCl 2) (15, 30, or 100 µM) to assess changes in catalase enzyme activity or for 6 h to assess the induction of catalase mRNA by Northern analysis and in situ hybridization. RPE cells were also treated with 30 µM ZnCl 2 for 2, 6, 24, 48 and 72 h to assess the time course of changes in catalase enzyme activity, changes in mRNA levels and status of the Sp1 transcription factor. RESULTS. Catalase activity was increased above control by the addition of 15, 30 and 100 µM ZnCl 2. Catalase gene expression was induced by 30 µM zinc in 6 h, but decreased to non-treated control levels by 24 h....

This publication has 26 references indexed in Scilit: