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Cytoplasmic thioredoxin reductase is essential for embryogenesis but dispensable for cardiac development.

Mol. Cell. Biol. 25, 1980-1988 (2005)
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Two distinct thioredoxin/thioredoxin reductase systems are present in the cytosol and the mitochondria of mammalian cells. Thioredoxins (Txn), the main substrates of thioredoxin reductases (Txnrd), are involved in numerous physiological processes, including cell-cell communication, redox metabolism, proliferation, and apoptosis. To investigate the individual contribution of mitochondrial (Txnrd2) and cytoplasmic (Txnrd1) thioredoxin reductases in vivo, 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 impairment in vivo, Txnrd1-deficient embryonic fibroblasts do not proliferate in vitro. In contrast, ex vivo-cultured embryonic Txnrd1-deficient cardiomyocytes are not affected, and mice with a heart-specific inactivation of Txnrd1 develop normally and appear healthy. Our results indicate that Txnrd1 plays an essential role during embryogenesis in most developing tissues except the heart.
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Publication type Article: Journal article
Document type Scientific Article
Language english
Publication Year 2005
HGF-reported in Year 2005
ISSN (print) / ISBN 0270-7306
e-ISSN 1098-5549
Quellenangaben Volume: 25, Issue: 5, Pages: 1980-1988 Article Number: , Supplement: ,
Publisher American Society for Microbiology (ASM)
Reviewing status Peer reviewed
POF-Topic(s) 30504 - Mechanisms of Genetic and Environmental Influences on Health and Disease
30201 - Metabolic Health
30204 - Cell Programming and Repair
30202 - Environmental Health
Research field(s) Immune Response and Infection
Genetics and Epidemiology
PSP Element(s) G-501400-006
G-500600-003
G-500500-001
G-500900-001
PubMed ID 15713651
Scopus ID 20044378664
Erfassungsdatum 2005-02-15