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For:
Zhang H
, Wu J, Yuan J, Li H, Zhang Y, Wu W, Chen W, Wang C, Meng S, Chen S, Huo M, He Y, Zhang C.
Ethaselen synergizes with oxaliplatin in tumor growth inhibition by inducing ROS production and inhibiting TrxR1 activity in gastric cancer.
J Exp Clin Cancer Res
2021;
40
:260. [PMID:
34412665
PMCID:
PMC8375208
DOI:
10.1186/s13046-021-02052-z
]
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Citation(s) in
RCA
: 2
]
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Impact Index Per Article: 0.7
]
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[Received: 11/04/2020]
[Accepted: 02/07/2021]
[Indexed: 12/23/2022]
Number
Cited by Other Article(s)
1
Wright DE
, Siddika T, Heinemann IU, O’Donoghue P. Delivery of the selenoprotein thioredoxin reductase 1 to mammalian cells.
Front Mol Biosci
2022;
9
:1031756. [PMID:
36304926
PMCID:
PMC9595596
DOI:
10.3389/fmolb.2022.1031756
]
[
Citation(s) in
RCA
: 2
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Impact Index Per Article: 1.0
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[Received: 08/30/2022]
[Accepted: 09/20/2022]
[Indexed: 11/13/2022]
Open
Abstract
Over-expression of genetically encoded thioredoxin reductase 1 (TrxR1) TrxR1 can be toxic to cells due to the formation of a truncated version of the enzyme. We developed a new mammalian cell-based model to investigate TrxR1 activity. Fusion of the HIV-derived cell penetrating peptide (TAT) enabled efficient cellular uptake of purified TrxR1 containing 21 genetically encoded amino acids, including selenocysteine. The TAT peptide did not significantly alter the catalytic activity of TrxR1
in vitro
. We monitored TrxR1-dependent redox activity in human cells using a TrxR1-specific red fluorescent live-cell reporter. Using programmed selenocysteine incorporation in
Escherichia coli
, our approach allowed efficient production of active recombinant human selenoprotein TrxR1 for delivery to the homologous context of the mammalian cell. The delivered TAT-TrxR1 showed robust activity in live cells and provided a novel platform to study TrxR1 biology in human cells.
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Grants
Natural Sciences and Engineering Research Council of Canada
Canadian Institutes of Health Research
Canada Research Chairs
Canada Foundation for Innovation
Ontario Ministry of Research and Innovation
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Affiliation(s)
David E. Wright
Tarana Siddika
Ilka U. Heinemann
Patrick O’Donoghue
*Correspondence: Patrick O’Donoghue,
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2
Selenium and tellurium in the development of novel small molecules and nanoparticles as cancer multidrug resistance reversal agents.
Drug Resist Updat
2022;
63
:100844. [DOI:
10.1016/j.drup.2022.100844
]
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Citation(s) in
RCA
: 3
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Impact Index Per Article: 1.5
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[Indexed: 02/07/2023]
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