Hyperoxia and thyroxine treatment and the relationships between reactive oxygen species generation, mitochondrial membrane potential, and cardiolipin in human lens epithelial cell cultures.

Abstract:

:Thyroxine-treated human lens epithelial cells, HLE B-3, were grown in either a normoxic or hyperoxic atmosphere as a first step in identifying factors related to their increased viability. Reactive oxygen species, ROS, and the apparent mitochondrial membrane potential, Delta Psi(m), were measured using fluorescent probes. ROS were significantly higher in HLE B-3 cells grown in a hyperoxic atmosphere for both thyroxine-treated and untreated samples. However, treatment with thyroxine produced 40% lower ROS levels than untreated cells. A mitochondrial uncoupler concomitantly reduced ROS generation. In cells that were grown in a hyperoxic atmosphere, the Delta Psi(m) was significantly higher for samples treated with thyroxine compared to those that were untreated. ROS generation correlated inversely with the apparent Delta Psi(m) and the amount of cardiolipin, and correlated with the amount of lipid oxidation products. These correlations were valid whether cardiolipin and the Delta Psi(m) were decreased as a result of oxygen or increased as a result of thyroxine treatment. Therapies that protect mitochondria from damage and reduce damaging ROS generation may potentially ameliorate the effects of oxidation that occur in aging tissues and in diseases such as cataract.

journal_name

Curr Eye Res

journal_title

Current eye research

authors

Huang L,Yappert MC,Jumblatt MM,Borchman D

doi

10.1080/02713680802167554

subject

Has Abstract

pub_date

2008-07-01 00:00:00

pages

575-86

issue

7

eissn

0271-3683

issn

1460-2202

pii

794711862

journal_volume

33

pub_type

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