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Zeng Y, Li J, Guo W, Luo W, Liu X, He R, Hu Z, Duan L, Xia C, Luo D. AKR1B10 protects against UVC-induced DNA damage in breast cancer cells. Acta Biochim Biophys Sin (Shanghai) 2021; 53:726-738. [PMID: 33913495 DOI: 10.1093/abbs/gmab045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Indexed: 11/13/2022] Open
Abstract
The cellular response to DNA damage is crucial for maintaining the integrity and stability of molecular structure. To maintain genome stability, DNA-damaged cells should be arrested so that mutations can be repaired before replication. Although several key components required for this arrest have been discovered, the majority of the pathways are still unclear. Through a number of assays, including cell viability, colony formation, and apotheosis assay, we found that AKR1B10 protected cells from UVC-induced DNA damage. Surprisingly, UVC-induced γH2AX foci and DNA double-strand breaks in the AKR1B10-overexpressing cells were ∼4-5 folds lower than those in the control group. The expression levels of AKR1B10, p53, chk1, chk2, nuclear factor (NF)-κB, and p65 showed dynamic changes in response to UVC irradiation. Our results suggested that AKR1B10 is involved in the pathway of cell cycle checkpoint and NF-κB in DNA damage. Taken together, our results suggest that AKR1B10 is involved in the repair of the DNA double-strand break, which provides a new insight into the role of AKR1B10 in DNA damage repair and indicates a new trail in tumorigenesis and cancer drug resistance.
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Affiliation(s)
- Yuanqing Zeng
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
- Department of Clinical Laboratory, Zhuhai Hospital, Guangdong Hospital of Traditional Chinese Medicine, Zhuhai 519015, China
| | - Jia Li
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Wangyuan Guo
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Weihao Luo
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Xiangting Liu
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Rongzhang He
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Zheng Hu
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Lili Duan
- Translational Medicine Institute, The First People’s Hospital of Chenzhou, University of South China, Chenzhou 423000, China
| | - Chenglai Xia
- Affiliated Foshan Maternity & Child Healthcare Hospital, Southern Medical University, Foshan 528000, China
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 520150, China
| | - Dixian Luo
- Department of Laboratory Medicine, Huazhong University of Science and Technology Union Shenzhen Hospital (Nanshan Hospital), Shenzhen 518000, China
- Center for Laboratory and Pathology, National & Local Joint Engineering Laboratory for High-through Molecular Diagnosis Technology, The First People’s Hospital of Chenzhou, Southern Medical University, Chenzhou 423000, China
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Kim MJ, Johnson WA. ROS-mediated activation of Drosophila larval nociceptor neurons by UVC irradiation. BMC Neurosci 2014; 15:14. [PMID: 24433322 PMCID: PMC3898224 DOI: 10.1186/1471-2202-15-14] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 01/09/2014] [Indexed: 11/24/2022] Open
Abstract
Background The complex Drosophila larval peripheral nervous system, capable of monitoring sensory input from the external environment, includes a family of multiple dendritic (md) neurons with extensive dendritic arbors tiling the inner surface of the larval body wall. The class IV multiple dendritic (mdIV) neurons are the most complex with dendritic nerve endings forming direct intimate contacts with epithelial cells of the larval body wall. Functioning as polymodal mechanonociceptors with the ability to respond to both noxious mechanical stimulation and noxious heat, the mdIV neurons are also activated by nanomolar levels of the endogenous reactive oxygen species (ROS), H2O2. Although often associated with tissue damage related to oxidative stress, endogenous ROS have also been shown to function as signaling molecules at lower concentrations. The overall role of ROS in sensory signaling is poorly understood but the acutely sensitive response of mdIV neurons to ROS-mediated activation is consistent with a routine role in the regulation of mdIV neuronal activity. Larvae respond to short wavelength ultraviolet (UVC) light with an immediate and visual system-independent writhing and twisting of the body previously described as a nociceptive response. Molecular and cellular mechanisms mediating this response and potential relationships with ROS generation are not well understood. We have used the UVC-induced writhing response as a model for investigation of the proposed link between endogenous ROS production and mdIV neuron function in the larval body wall. Results Transgenic inactivation of mdIV neurons caused a strong suppression of UVC-induced writhing behavior consistent with a key role for the mdIV neurons as mediators of the behavioral response. Direct imaging of ROS-activated fluorescence showed that UVC irradiation caused a significant increase in endogenous ROS levels in the larval body wall and transgenic overexpression of antioxidant enzymes strongly suppressed the UVC-induced writhing response. Direct electrophysiological recordings demonstrated that UVC irradiation also increased neuronal activity of the mdIV neurons. Conclusions Results obtained using UVC irradiation to induce ROS generation provide evidence that UVC-induced writhing behavior is mediated by endogenous production of ROS capable of activating mdIV mechanonociceptors in the larval body wall.
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Affiliation(s)
| | - Wayne A Johnson
- Department of Molecular Physiology and Biophysics, University of Iowa, Roy J, and Lucille A, Carver College of Medicine, Iowa City, IA 52242, USA.
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Bereczki O, Ujfaludi Z, Pardi N, Nagy Z, Tora L, Boros IM, Balint E. TATA binding protein associated factor 3 (TAF3) interacts with p53 and inhibits its function. BMC Mol Biol 2008; 9:57. [PMID: 18549481 PMCID: PMC2441632 DOI: 10.1186/1471-2199-9-57] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2007] [Accepted: 06/12/2008] [Indexed: 01/16/2023] Open
Abstract
Background The tumour suppressor protein p53 is a sequence specific DNA-binding transcription regulator, which exerts its versatile roles in genome protection and apoptosis by affecting the expression of a large number of genes. In an attempt to obtain a better understanding of the mechanisms by which p53 transcription function is regulated, we studied p53 interactions. Results We identified BIP2 (Bric-à-brac interacting protein 2), the fly homolog of TAF3, a histone fold and a plant homeodomain containing subunit of TFIID, as an interacting partner of Drosophila melanogaster p53 (Dmp53). We detected physical interaction between the C terminus of Dmp53 and the central region of TAF3 both in yeast two hybrid assays and in vitro. Interestingly, DmTAF3 can also interact with human p53, and mammalian TAF3 can bind to both Dmp53 and human p53. This evolutionarily conserved interaction is functionally significant, since elevated TAF3 expression severely and selectively inhibits transcription activation by p53 in human cell lines, and it decreases the level of the p53 protein as well. Conclusion We identified TAF3 as an evolutionarily conserved negative regulator of p53 transcription activation function.
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Affiliation(s)
- Orsolya Bereczki
- Department of Biochemistry and Molecular Biology, University of Szeged, Szeged, Hungary.
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