Embryonic Lethality in Mice Lacking Mismatch-Specific Thymine DNA Glycosylase Is Partially Prevented by DOPS, a Precursor of Noradrenaline
-
- Saito Yusuke
- Department of Cell Biology, Graduate School of Medicine, Tohoku University
-
- Ono Tetsuya
- Department of Cell Biology, Graduate School of Medicine, Tohoku University
-
- Takeda Naoki
- Center for Animal Resources and Development, Kumamoto University
-
- Nohmi Takehiko
- Division of Genetics and Mutagenesis, National Institute of Health Sciences
-
- Seki Masayuki
- Molecular Cell Biology Laboratory, Graduate School of Pharmaceutical Sciences, Tohoku University
-
- Enomoto Takemi
- Molecular Cell Biology Laboratory, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University
-
- Noda Tetsuo
- Genome Center, Japanese Foundation for Cancer Research
-
- Uehara Yoshihiko
- Department of Cell Biology, Graduate School of Medicine, Tohoku University
Search this article
Abstract
Thymine DNA glycosylase (TDG) is involved in the repair of G:T and G:U mismatches caused by hydrolytic deamination of 5-methylcytosine and cytosine, respectively. Recent studies have shown that TDG not only has G-T/U glycosylase activities but also acts in the maintaining proper epigenetic status. In order to investigate the function of TDG in vivo, mice lacking Tdg, Tdg (−/−), were generated. Tdg mutant mice died in utero by 11.5 days post coitum (dpc), although there were no significant differences in the spontaneous mutant frequencies between wild type and Tdg (−/−) embryos. On the other hand, the levels of noradrenaline in 10.5 dpc whole embryos, which is necessary for normal embryogenesis, were dramatically reduced in Tdg (−/−) embryos. Consequently, we tested the effect of D, L-threo-3, 4-dihydroxyphenylserine (DOPS), a synthetic precursor of noradrenaline, on the survival of the Tdg (−/−) embryos. DOPS was given to pregnant Tdg (+/−) mice from 6.5 dpc through drinking water. Most of the Tdg (−/−) embryos were alive at 11.5 dpc, and they were partially rescued up to 14.5 dpc by the administration of DOPS. In contrast, the administration of L-3, 4-dihydroxyphenylalanine (L-DOPA) had marginal effects on Tdg (−/−) embryonic lethality. No embryo was alive without DOPS beyond 11.5 dpc, suggesting that the lethality in (−/−) embryos is partially due to the reduction of noradrenaline. These results suggest that embryonic lethality in Tdg (−/−) embryos is due, in part, to the reduction of noradrenaline levels.
Journal
-
- The Tohoku Journal of Experimental Medicine
-
The Tohoku Journal of Experimental Medicine 226 (1), 75-83, 2012
Tohoku University Medical Press
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390282679220877696
-
- NII Article ID
- 10030196944
-
- NII Book ID
- AA00863920
-
- ISSN
- 13493329
- 00408727
-
- Text Lang
- en
-
- Data Source
-
- JaLC
- Crossref
- CiNii Articles
- KAKEN
-
- Abstract License Flag
- Disallowed