Abstract
We show that the Cys(2) mutant enzyme or the N-terminal reaction center alone can reduce Se-containing substrates selenocystine and selenite with only slightly less activity than the wild-type enzyme, in stark contrast to when Trx is used as the substrate when the enzyme suffers a 175-550-fold reduc...
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PMID: 19366212
PDF is available here.
Abstract
GPX1 and TXNRD2 polymorphisms individually were not associated with the risk of gastric cancer. Gene-gene interaction of GPX1 and TXNRD2 polymorphisms decreased the risk of gastric cancer. Carrying the protective genotype might decrease the risk at 62% (OR = 0.38, 95% CI = 0.26-0.55, P < 0.001) as c...
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PMID: 19035188
PDF is available here.
Abstract
We present evidence that overexpression of mitochondrial-located thioredoxin 2 (Trx2) or thioredoxin reductase 2 (TrxR2) attenuated NO-evoked HIF-1alpha accumulation and transactivation of HIF-1 in HEK293 cells. In contrast, cytosolic-located thioredoxin 1 (Trx1) enhanced HIF-1alpha protein amount a...
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PMID: 18045551
PDF is available here.
Abstract
A novel "Keppler type" ruthenium(III) compound trans-[bis(2-amino 5-methylthiazole)tetrachlororuthenate(III)] 1, of potential interest as an anticancer agent, was designed, synthesized, and characterized. Its interactions with various proteins were analyzed, including the selenoenzyme thioredoxin re...
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PMID: 17975904
PDF is available here.
Abstract
We investigated the effect of their hemizygosity (+/-) alone and in combination with dietary Se on enzymatic activity in various tissues. To assess the overall health of the corresponding mice, the growth, viability and fertility of the different experimental groups were also compared. Se depletion...
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PMID: 17937623
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Abstract
We show that conditional Txnrd2 knockouts generated using CD4- and CD19Cre transgenic mice lack Txnrd2 expression in CD4-- and CD19-positive T- and B-lymphocytes, respectively. However, the development and differentiation of both cell types in thymus and bone marrow was not significantly impaired. I...
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PMID: 17937622
PDF is available here.
Abstract
These findings indicate that long-term E2 treatment improves CHF by antioxidative mechanisms that involve the upregulation of Trx and inhibition of Rac1-mediated attenuated nicotinamide adenine dinucleotide phosphate oxidase activity and apoptosis signal-regulating kinase 1 /c-Jun N-terminal kinase/...
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PMID: 17562954
PDF is available here.
Abstract
Mitochondrial thioredoxin (mtTrx) can be oxidized in response to inducers of oxidative stress; yet the functional consequences of the oxidation have not been determined. This study evaluated the redox status of mtTrx and its association to oxidant-induced apoptosis. Results showed that mtTrx was oxid...
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PMID: 17113580
PDF is available here.
Abstract
We examined the effects of caloric restriction (2 mo) on the expression of the cytosolic and mitochondrial thioredoxin system in skeletal muscle and heart of senescent and young rats. Mitochondrial thioredoxin reductase (TrxR2) is significantly reduced in aging skeletal and cardiac muscle and renorm...
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PMID: 16675629
PDF is available here.
Abstract
The effect of calcium ions has been studied on three different isoforms of thioredoxin reductase. The cytosolic (TrxR1), mitochondrial (TrxR2), and the Escherichia coli enzymes were examined and compared. In our condition, TrxR1 appears extremely sensitive to Ca2+ showing an IC50 of about 160 nM, wh...
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PMID: 16564501
PDF is available here.
Abstract
We report an alternative splicing variant of TrxR2 (TrxR2A), which displays a 3-bp deletion in the coding region and an insertion of 1228 bp in the 3'-UTR, between the stop codon and the SECIS element, of the TrxR2 cDNA. In order to determine the cellular function of TrxR2A, we established TrxR2A-in...
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PMID: 16298692
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Abstract
We present the structural data on a mitochondrial TrxR, TrxR2 (also known as TR3 and TxnRd2). Mouse TrxR2, in which the essential selenocysteine residue had been replaced with cysteine, was isolated as a FAD-containing holoenzyme and crystallized (2.6 A; R = 22.2%; R(free) = 27.6%). The addition of...
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PMID: 16217027
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Abstract
We have studied eight markers spanning COMT and including portions of the two immediately adjacent genes, thioredoxin reductase 2 and armadillo repeat deleted in velocardiofacial syndrome (ARVCF), using association testing in 136 schizophrenia families. We found nominal evidence for association of i...
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PMID: 15340358
PDF is available here.
Abstract
We generated a mouse strain with a conditionally targeted deletion of Txnrd1. We show here that the ubiquitous Cre-mediated inactivation of Txnrd1 leads to early embryonic lethality. Homozygous mutant embryos display severe growth retardation and fail to turn. In accordance with the observed growth...
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PMID: 15713651
PDF is available here.
Abstract
We report on the development and characterization of stably transfected human embryonic kidney 293 cells that overexpress enzymatically active selenocysteine-containing cytosolic TrxR1 or mitochondrial TrxR2. We demonstrate that the overexpression of selenium-containing TrxR1 results in lower expres...
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PMID: 15471857
PDF is available here.
Abstract
We found that several genes in the thioredoxin (Txn) pathway were rapidly modified after E2 treatment in the mouse uterus. Txn is a 12-kDa protein with multiple roles in the cell, including protection against oxidative stress and apoptosis, regulation of transcription factor activity, and regulation...
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PMID: 15345672
PDF is available here.
Marcus Conrad,
Cemile Jakupoglu,
Stéphanie G Moreno,
Stefanie Lippl,
Ana Banjac,
Manuela Schneider,
Heike Beck,
Antonis K Hatzopoulos,
Ursula Just,
Fred Sinowatz,
Wolfgang Schmahl,
Kenneth R Chien,
Wolfgang Wurst,
Georg W Bornkamm and
Markus Brielmeier
Abstract
We generated and characterized mice lacking functional mitochondrial thioredoxin reductase (TrxR2). Ubiquitous Cre-mediated inactivation of TrxR2 is associated with embryonic death at embryonic day 13. TrxR2(TrxR2(-/-)minus;/TrxR2(-/-)minus;) embryos are smaller and severely anemic and show increase...
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PMID: 15485910
PDF is available here.
Abstract
We investigated the effects of overexpression of TrxR2, Trx2, or both on mammalian cell responses to various apoptotic inducers. Stable transfectants of mouse Neuro2A cells were generated that overexpressed TrxR2 or an EGFP-TrxR2 fusion protein. EGFP-TrxR2 was enzymatically active and was localized...
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PMID: 15082714
PDF is available here.
Abstract
These results suggest that the SeCys residue of TrxR2 plays a critical role in cell survival by serving as an electron donor for Trx-II and subsequent peroxiredoxin-III, which is a primary line of defense against H(2)O(2) in mitochondria....
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PMID: 15178321
PDF is available here.
Abstract
We demonstrate that cytochrome c is a substrate for both TrxR1 and TrxR2. In addition, cells overexpressing TrxR2 are more resistant to impairment of complex III in the mitochondrial respiratory chain upon both antimycin A and myxothiazol treatments, suggesting a complex III bypassing function of Tr...
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PMID: 15110392
PDF is available here.
Abstract
We investigated genes differentially expressed between sexes or induced to express by estrogen in neonatal rat hypothalamus using DNA microarray analysis in combination with real-time RT-PCR. It was found that the levels of expression of the genes encoding glutamic acid decarboxylase 65 and coronin...
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PMID: 14967907
PDF is available here.
Abstract
We devised a novel assay that, combining the advantages of multiplex and real-time PCR, streamlines the quantitation of the actual mRNA copy numbers in whole-animal experiments. Quantitations reported establish differences among adult organs and embryonic stages, compare mRNA decay rates, explore th...
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PMID: 12954614
PDF is available here.
Abstract
We generated stable HeLa cell lines expressing a dominant negative form of TrxR2 (TrxR2DN) under the control of the tetracycline-off system. We observed that TrxR2DN-induced cells, following stimulation with EGF, produced more hydrogen peroxide than uninduced cells. The extent of protein tyrosine ph...
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PMID: 12705894
PDF is available here.