Variation in metallothionein gene expression is associated with adaptation to copper in the earthworm Dendrobaena octaedra

2013 ◽  
Vol 157 (2) ◽  
pp. 220-226 ◽  
Author(s):  
Karina Vincents Fisker ◽  
Martin Holmstrup ◽  
Jesper Givskov Sørensen
Keyword(s):  
Gene Expression ◽  
Metallothionein Gene ◽  
Dendrobaena Octaedra

scholarly journals Endotoxin induction of murine metallothionein gene expression.

1990 ◽  
Vol 265 (25) ◽  
pp. 15267-15274 ◽  
Author(s):  
S.K. De ◽  
M.T. McMaster ◽  
G.K. Andrews
Keyword(s):  
Gene Expression ◽  
Metallothionein Gene

Role of heat shock transcription factor in yeast metallothionein gene expression

1991 ◽  
Vol 11 (7) ◽  
pp. 3676-3681
Author(s):  
W M Yang ◽  
W Gahl ◽  
D Hamer
Keyword(s):  
Gene Expression ◽  
Transcription Factor ◽  
Heat Shock ◽  
Gene Transcription ◽  
Heat Shock Factor ◽  
Heat Shock Transcription Factor ◽  
Wild Type ◽  
Promoter Sequences ◽  
Metallothionein Gene ◽  
Upstream Promoter

The induction of Saccharomyces cerevisiae metallothionein gene transcription by Cu and Ag is mediated by the ACE1 transcription factor. In an effort to detect additional stimuli and factors that regulate metallothionein gene transcription, we isolated a Cu-resistant suppressor mutant of an ACE1 deletion strain. Even in the absence of metals, the suppressor mutant exhibited high basal levels of metallothionein gene transcription that required upstream promoter sequences. The suppressor gene was cloned, and its predicted product was shown to correspond to yeast heat shock transcription factor with a single-amino-acid substitution in the DNA-binding domain. The mutant heat shock factor bound strongly to metallothionein gene upstream promoter sequences, whereas wild-type heat shock factor interacted weakly with the same region. Heat treatment led to a slight but reproducible induction of metallothionein gene expression in both wild-type and suppressor strains, and Cd induced transcription in the mutant strain. These studies provide evidence for multiple pathways of metallothionein gene transcriptional regulation in S. cerevisiae.

scholarly journals Physiological, Diurnal and Stress-Related Variability of Cadmium-Metallothionein Gene Expression in Land Snails

PLoS ONE ◽  
2016 ◽  
Vol 11 (3) ◽  
pp. e0150442 ◽  
Author(s):  
Veronika Pedrini-Martha ◽  
Michael Niederwanger ◽  
Renate Kopp ◽  
Raimund Schnegg ◽  
Reinhard Dallinger
Keyword(s):  
Gene Expression ◽  
Land Snails ◽  
Metallothionein Gene

Spatiotemporal changes in metallothionein gene expression during embryogenesis in the wall lizard Podarcis sicula

2010 ◽  
Vol 313A (7) ◽  
pp. 410-420 ◽  
Author(s):  
Palma Simoniello ◽  
Chiara Maria Motta ◽  
Rosaria Scudiero ◽  
Francesca Trinchella ◽  
Silvana Filosa
Keyword(s):  
Gene Expression ◽  
Podarcis Sicula ◽  
Metallothionein Gene ◽  
Spatiotemporal Changes

Cell-specific metallothionein gene expression in mouse decidua and placentae

Development ◽  
1989 ◽  
Vol 107 (3) ◽  
pp. 611-621 ◽  
Author(s):  
S.K. De ◽  
M.T. McMaster ◽  
S.K. Dey ◽  
G.K. Andrews
Keyword(s):  
Gene Expression ◽  
In Situ Hybridization ◽  
Embryo Implantation ◽  
Normal Pregnancy ◽  
Mrna Levels ◽  
Metallothionein Gene ◽  
Visceral Yolk Sac ◽  
Rna In Situ Hybridization ◽  
Low Levels

Oligodeoxyribonucleotide excess solution hybridization, Northern blot and in situ hybridization were used to analyze metallothionein gene expression in mouse decidua and placentae during gestation. Metallothionein (MT) -I and -II mRNA levels were constitutively elevated, 11- and 13-fold, respectively, relative to the adult liver, in the deciduum (D8), and decreased coordinately about 6-fold during the period of development when the deciduum is replaced by the developing placenta (D10-16). Coincident with this decline, levels of MT mRNA increased dramatically in the visceral yolk sac endoderm. In situ hybridization established that MT-I mRNA was present at low levels in the uterine luminal epithelium (D4), but was elevated at the site of embryo implantation exclusively in the primary decidual zone by D5, and then in the secondary decidual zone (D6-8). Although low levels of MT mRNA were detected in total placental RNA, in situ hybridization revealed constitutively high levels in the outer placental spongiotrophoblasts. Analysis of pulse-labeled proteins from decidua and placentae established that these tissues are active in the synthesis of MT. The constitutively high levels of MT mRNA in decidua were only slightly elevated following injection of cadmium (Cd) and/or zinc (Zn), whereas in placentae they increased several-fold. MT mRNA levels were equally high in decidua and experimentally induced deciduomata (D8) which establishes that decidual MT gene expression is not dependent on the presence of the embryo or some embryo-derived factor. Although the functional role of MT during development is speculative, these results establish the concept that, from the time of implantation to late in gestation, the mouse embryo is surrounded by cells, interposed between the maternal and embryonic environments, which actively express the MT genes. This suggests that MT plays an important role in the establishment and maintenance of normal pregnancy.

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