Role of the DNA repair glycosylase OGG1 in the activation of murine splenocytes
OGG1 (8-oxoguanine-DNA glycosylase) is the major DNA repair glycosylase removing the premutagenic DNA base modification 8-oxo-7,8-dihydroguanine (8-oxoG) from the genome of mammalian cells. In addition, there is accumulating evidence that OGG1 and its substrate 8-oxoG might function in the regulatio...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2017
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| In: |
DNA repair
Year: 2017, Jahrgang: 58, Pages: 13-20 |
| ISSN: | 1568-7856 |
| DOI: | 10.1016/j.dnarep.2017.08.005 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1016/j.dnarep.2017.08.005 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1568786417301817 
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| Verfasserangaben: | Marco Seifermann, Alexander Ulges, Tobias Bopp, Svetlana Melcea, Andrea Schäfer, Sugako Oka, Yusaku Nakabeppu, Arne Klungland, Christof Niehrs, Bernd Epe |
MARC
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| 245 | 1 | 0 | |a Role of the DNA repair glycosylase OGG1 in the activation of murine splenocytes |c Marco Seifermann, Alexander Ulges, Tobias Bopp, Svetlana Melcea, Andrea Schäfer, Sugako Oka, Yusaku Nakabeppu, Arne Klungland, Christof Niehrs, Bernd Epe |
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| 520 | |a OGG1 (8-oxoguanine-DNA glycosylase) is the major DNA repair glycosylase removing the premutagenic DNA base modification 8-oxo-7,8-dihydroguanine (8-oxoG) from the genome of mammalian cells. In addition, there is accumulating evidence that OGG1 and its substrate 8-oxoG might function in the regulation of certain genes, which could account for an attenuated immune response observed in Ogg1−/− mice in several settings. Indications for at least two different mechanisms have been obtained. Thus, OGG1 could either act as an ancillary transcription factor cooperating with the lysine-specific demethylase LSD1 or as an activator of small GTPases. Here, we analysed the activation by lipopolysaccaride (LPS) of primary splenocytes obtained from two different Ogg1−/− mouse strains. We found that the induction of TNF-α expression was reduced in splenocytes (in particular macrophages) of both Ogg1−/− strains. Notably, an inhibitor of LSD1, OG-L002, reduced the induction of TNF-α mRNA in splenocytes from wild-type mice to the level observed in splenocytes from Ogg1−/− mice and had no influence in the latter cells. In contrast, inhibitors of the MAP kinases p38 and JNK as well as the antioxidant N-acetylcysteine attenuated the LPS-stimulated TNF-α expression both in the absence and presence of OGG1. The free base 8-oxo-7,8-dihydroguanine had no influence on the TNF-α expression in the splenocytes. The data demonstrate that OGG1 plays a role in an LSD1-dependent pathway of LPS-induced macrophage activation in mice. | ||
| 650 | 4 | |a Base excision repair | |
| 650 | 4 | |a LSD1/KDM1A | |
| 650 | 4 | |a OGG1 | |
| 650 | 4 | |a Oxidatively generated DNA damage | |
| 650 | 4 | |a Regulation of transcription | |
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