Protective elevations of glutathione and metallothionein in cadmium-exposed mesangial cells.

Abstract:

:Exposure of cultured rat mesangial cells to CdCl2 caused a dose- and time-dependent increase in intracellular glutathione that was significant at 0.5 microM and maximal at 1 microM Cd2+. The effect depended on glutathione synthesis and was masked by inhibiting synthesis with buthionine sulfoximine. The cells responded to slightly higher concentrations of Cd with a marked decrease in DNA synthesis, and reversible depletion of glutathione enhanced this sensitivity. Pre-induction of the thiol-rich protein metallothionein with ZnCl2 afforded a degree of protection to the glutathione-depleted cells. We conclude that the Cd-dependent elevation of glutathione in these cells may be protective at concentrations of Cd that can arise during acute environmental and occupational exposures.

journal_name

Toxicology

journal_title

Toxicology

authors

Chin TA,Templeton DM

doi

10.1016/0300-483x(93)90145-i

subject

Has Abstract

pub_date

1993-01-29 00:00:00

pages

145-56

issue

1-2

eissn

0300-483X

issn

1879-3185

pii

0300-483X(93)90145-I

journal_volume

77

pub_type

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