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Nuclear respiratory factor 1 overexpression attenuates anti-benzopyrene-7,8-diol-9,10-epoxide-induced S-phase arrest of bronchial epithelial cells.
- Source :
-
Molecular Medicine Reports . 2016, Vol. 13 Issue 5, p4372-4378. 7p. - Publication Year :
- 2016
-
Abstract
- Nuclear respiratory factor 1 (NRF-1) has important roles in the regulation of several key metabolic genes required for cellular growth and respiration. A previous study by our group indicated that NRF-1 is involved in mitochondrial dysfunction induced by the environmental pollutant benzo[a] pyrene in the 16HBE human bronchial epithelial cell line. In the present study, it was observed that its genotoxic metabolite, anti-benzopyrene-7,8-diol-9,10-epoxide (BPDE), triggered cell cycle arrest in S-phase in 16HBE cells by activating ataxia-telangiectasia (ATM)/checkpoint kinase (Chk)2 and ATM and Rad3 related (ATR)/Chk1 signaling pathways. NRF-1 expression was suppressed by BPDE after treatment for 6 h. Flow cytometric analysis revealed that NRF-1 overexpression attenuated cell cycle arrest in S-phase induced by BPDE. In line with this result, DNA-damage checkpoints were activated following NRF-1 overexpression, as demonstrated by increased phosphorylation of ATM, Chk2 and ?H2AX, but not ATR and Chk1, according to western blot analysis. It was therefore indicated that NRF-1 overexpression attenuated BPDE-induced S-phase arrest via the ATM/Chk2 signaling pathway. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17912997
- Volume :
- 13
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Molecular Medicine Reports
- Publication Type :
- Academic Journal
- Accession number :
- 114967835
- Full Text :
- https://doi.org/10.3892/mmr.2016.5065