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Zhao S, Goewey Ruiz JA, Sebastian M, Kidane D. Defective DNA polymerase beta invoke a cytosolic DNA mediated inflammatory response. Front Immunol 2022; 13:1039009. [PMID: 36624848 PMCID: PMC9823925 DOI: 10.3389/fimmu.2022.1039009] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
Base excision repair (BER) has evolved to maintain the genomic integrity of DNA following endogenous and exogenous agent induced DNA base damage. In contrast, aberrant BER induces genomic instability, promotes malignant transformation and can even trigger cancer development. Previously, we have shown that deoxyribo-5'-phosphate (dRP) lyase deficient DNA polymerase beta (POLB) causes replication associated genomic instability and sensitivity to both endogenous and exogenous DNA damaging agents. Specifically, it has been established that this loss of dRP lyase function promotes inflammation associated gastric cancer. However, the way that aberrant POLB impacts the immune signaling and inflammatory responses is still unknown. Here we show that a dRP lyase deficient variant of POLB (Leu22Pro, or L22P) increases mitotic dysfunction associated genomic instability, which eventually leads to a cytosolic DNA mediated inflammatory response. Furthermore, poly(ADP-ribose) polymerase 1 inhibition exacerbates chromosomal instability and enhances the cytosolic DNA mediated inflammatory response. Our results suggest that POLB plays a significant role in modulating inflammatory signaling, and they provide a mechanistic basis for future potential cancer immunotherapies.
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Affiliation(s)
- Shengyuan Zhao
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, United States
| | - Julia A. Goewey Ruiz
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, United States
| | - Manu Sebastian
- Dept. of Veterinary Medicine & Surgery, University of Texas (UT) MD Anderson Cancer Center, Houston, TX, United States
- Dept. of Translational Molecular Pathology, University of Texas (UT) MD Anderson Cancer Center, Houston, TX, United States
| | - Dawit Kidane
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, Austin, TX, United States
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2
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Nicy V, Das M, Gurusubramanian G, Mondal P, Roy VK. Treatment of copper nanoparticles (CuNPs) for two spermatogenic cycles impairs testicular activity via down-regulating steroid receptors and inhibition of germ cell proliferation in a mice model. Nanotoxicology 2022; 16:658-678. [PMID: 36256793 DOI: 10.1080/17435390.2022.2133647] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Although copper is an indispensable trace metal for biological functions, its excess exposure causes hazardous effects on health. Copper in the form of nanoparticles (CuNPs) is widely used at present and therefore, the living organism is at continuous risk of its adverse effect. The prolonged treatment of CuNPs has not been evaluated yet on the male reproductive system. To demonstrate the combined adverse effects and the mechanism of copper nanoparticles (CuNPs), three doses of CuNPs, 10, 100 and 200 mg/kg were orally given to mice for 70 days. The present study demonstrated that CuNPs decreased the sperm quality parameters, male circulating hormones, induces testicular damages, increased oxidative stress, apoptosis, decreases antioxidant enzymes, germ cell proliferation, and increases the expression of 8-oxoguanine DNA glycosylase-1 (OGG1), apelin receptor (APJ) as well. CuNPs also down-regulated the expression of AR and Erα in the testis. These results suggest that CuNPs manifested their adverse effect on testis via modulating steroid and cytokine (apelin) receptors. The adverse effect of testis was most pronounced at the highest dose (200 mg/kg) of CuNPs, however, other doses show a less toxic effect on various parameters. In conclusion, results indicated that CuNPs may impair spermatogenesis via oxidative stress-mediated DNA damage and germ cell apoptosis at high doses.
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Affiliation(s)
- Vanrohlu Nicy
- Department of Zoology, Mizoram University, Aizawl, Mizoram, India
| | - Milirani Das
- Department of Zoology, Mizoram University, Aizawl, Mizoram, India
| | | | - Pradip Mondal
- Department of Zoology, Netaji Mahavidyalaya, Hooghly, West Bengal, India
| | - Vikas Kumar Roy
- Department of Zoology, Mizoram University, Aizawl, Mizoram, India
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3
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Hao W, Wang J, Zhang Y, Wang C, Xia L, Zhang W, Zafar M, Kang JY, Wang R, Ali Bohio A, Pan L, Zeng X, Wei M, Boldogh I, Ba X. Enzymatically inactive OGG1 binds to DNA and steers base excision repair toward gene transcription. FASEB J 2020; 34:7427-7441. [PMID: 32378256 PMCID: PMC7318607 DOI: 10.1096/fj.201902243r] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 11/19/2019] [Accepted: 03/17/2020] [Indexed: 12/11/2022]
Abstract
8‐Oxoguanine DNA glycosylase1 (OGG1)‐initiated base excision repair (BER) is the primary pathway to remove the pre‐mutagenic 8‐oxo‐7,8‐dihydroguanine (8‐oxoG) from DNA. Recent studies documented 8‐oxoG serves as an epigenetic‐like mark and OGG1 modulates gene expression in oxidatively stressed cells. For this new role of OGG1, two distinct mechanisms have been proposed: one is coupled to base excision, while the other only requires substrate binding of OGG1––both resulting in conformational adjustment in the adjacent DNA sequences providing access for transcription factors to their cis‐elements. The present study aimed to examine if BER activity of OGG1 is required for pro‐inflammatory gene expression. To this end, Ogg1/OGG1 knockout/depleted cells were transfected with constructs expressing wild‐type (wt) and repair‐deficient mutants of OGG1. OGG1's promoter enrichment, oxidative state, and gene expression were examined. Results showed that TNFα exposure increased levels of oxidatively modified cysteine(s) of wt OGG1 without impairing its association with promoter and facilitated gene expression. The excision deficient K249Q mutant was even a more potent activator of gene expression; whereas, mutant OGG1 with impaired substrate recognition/binding was not. These data suggested the interaction of OGG1 with its substrate at regulatory regions followed by conformational adjustment in the adjacent DNA is the primary mode to modulate inflammatory gene expression.
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Affiliation(s)
- Wenjing Hao
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Jing Wang
- Department of Respiratory Medicine, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Yuanhang Zhang
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Chenxin Wang
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Lan Xia
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Wenhe Zhang
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Muhammad Zafar
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Ju-Yong Kang
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,Faculty of Life Science, Kim Il Sung University, Pyongyang, DPRK
| | - Ruoxi Wang
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China.,Key Laboratory of Animal Resistance Biology of Shandong Province, Institute of Biomedical Sciences, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Ameer Ali Bohio
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Lang Pan
- School of Life Science, Northeast Normal University, Changchun, China.,Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Xianlu Zeng
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Min Wei
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX, USA
| | - Xueqing Ba
- Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, China.,School of Life Science, Northeast Normal University, Changchun, China
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Pan L, Wang H, Luo J, Zeng J, Pi J, Liu H, Liu C, Ba X, Qu X, Xiang Y, Boldogh I, Qin X. Epigenetic regulation of TIMP1 expression by 8-oxoguanine DNA glycosylase-1 binding to DNA:RNA hybrid. FASEB J 2019; 33:14159-14170. [PMID: 31652414 DOI: 10.1096/fj.201900993rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
8-Oxoguanine DNA glycosylase-1 (OGG1)-initiated base excision repair pathway is primarily responsible for 7, 8-dihydro-8-oxoguanine (8-oxoG) removal from DNA. Recent studies, however, have shown that 8-oxoG in gene regulatory elements may serve as an epigenetic mark, and OGG1 has distinct functions in modulating gene expression. Genome-wide mapping of oxidative stress-induced OGG1 enrichment within introns was documented, but its significance has not yet been fully characterized. Here, we explored whether OGG1 recruited to intron 1 of tissue inhibitor of metalloproteinase-1 (TIMP1) gene and modulated its expression. Using chromatin and DNA:RNA hybrid immunoprecipitation assays, we report recruitment of OGG1 to the DNA:RNA hybrid in intron 1, where it increases nascent RNA but lowers mRNA levels in O3-exposed human airway epithelial cells and mouse lungs. Decrease in TIMP1 expression is alleviated by antioxidant administration, small interfering RNA depletion, or inhibition of OGG1 binding to its genomic substrate. In vitro studies revealed direct interaction between OGG1 and 8-oxoG containing DNA:RNA hybrid, without excision of its substrate. Inhibition of OGG1 binding to DNA:RNA hybrid translated into an increase in TIMP1 expression and a decrease in oxidant-induced lung inflammatory responses as well as airway remodeling. Data documented here reveal a novel molecular link between OGG1 at damaged sites and transcription dynamics that may contribute to oxidative stress-induced cellular and tissue responses.-Pan, L., Wang, H., Luo, J., Zeng, J., Pi, J., Liu, H., Liu, C., Ba, X., Qu, X., Xiang, Y., Boldogh, I., Qin, X. Epigenetic regulation of TIMP1 expression by 8-oxoguanine DNA glycosylase-1 binding to DNA:RNA hybrid.
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Affiliation(s)
- Lang Pan
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Hui Wang
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Jinhua Luo
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Ji Zeng
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Jiao Pi
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Huijun Liu
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Chi Liu
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Xueqing Ba
- The Key Laboratory of Molecular Epigenetics, Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun, China
| | - Xiangping Qu
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Yang Xiang
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
| | - Istvan Boldogh
- Department of Microbiology and Immunology, School of Medicine, The University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | - Xiaoqun Qin
- Department of Physiology, School of Basic Medicine, Xiangya Medical School, Central South University, Changsha, China
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5
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Cross-examination of Oxidative Stress-induced DNA Glycosylase OGG1, a Mediator of Innate Inflammation. Transplantation 2019; 103:1071-1073. [PMID: 31246929 DOI: 10.1097/tp.0000000000002638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Hao W, Qi T, Pan L, Wang R, Zhu B, Aguilera-Aguirre L, Radak Z, Hazra TK, Vlahopoulos SA, Bacsi A, Brasier AR, Ba X, Boldogh I. Effects of the stimuli-dependent enrichment of 8-oxoguanine DNA glycosylase1 on chromatinized DNA. Redox Biol 2018; 18:43-53. [PMID: 29940424 PMCID: PMC6019822 DOI: 10.1016/j.redox.2018.06.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 12/16/2022] Open
Abstract
8-Oxoguanine DNA glycosylase 1 (OGG1) initiates the base excision repair pathway by removing one of the most abundant DNA lesions, 8-oxo-7,8-dihydroguanine (8-oxoG). Recent data showed that 8-oxoG not only is a pro-mutagenic genomic base lesion, but also functions as an epigenetic mark and that consequently OGG1 acquire distinct roles in modulation of gene expression. In support, lack of functional OGG1 in Ogg1-/- mice led to an altered expression of genes including those responsible for the aberrant innate and adaptive immune responses and susceptibility to metabolic disorders. Therefore, the present study examined stimulus-driven OGG1-DNA interactions at whole genome level using chromatin immunoprecipitation (ChIP)-coupled sequencing, and the roles of OGG1 enriched on the genome were validated by molecular and system-level approaches. Results showed that signaling levels of cellular ROS generated by TNFα, induced enrichment of OGG1 at specific sites of chromatinized DNA, primarily in the regulatory regions of genes. OGG1-ChIP-ed genes are associated with important cellular and biological processes and OGG1 enrichment was limited to a time scale required for immediate cellular responses. Prevention of OGG1-DNA interactions by siRNA depletion led to modulation of NF-κB's DNA occupancy and differential expression of genes. Taken together these data show TNFα-ROS-driven enrichment of OGG1 at gene regulatory regions in the chromatinized DNA, which is a prerequisite to modulation of gene expression for prompt cellular responses to oxidant stress.
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Affiliation(s)
- Wenjing Hao
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Tianyang Qi
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Lang Pan
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Ruoxi Wang
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Internal Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Bing Zhu
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Leopoldo Aguilera-Aguirre
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Zsolt Radak
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Tapas K Hazra
- Internal Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Spiros A Vlahopoulos
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Attila Bacsi
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Allan R Brasier
- Internal Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Xueqing Ba
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA.
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Ba X, Boldogh I. 8-Oxoguanine DNA glycosylase 1: Beyond repair of the oxidatively modified base lesions. Redox Biol 2017; 14:669-678. [PMID: 29175754 PMCID: PMC5975208 DOI: 10.1016/j.redox.2017.11.008] [Citation(s) in RCA: 160] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/08/2017] [Accepted: 11/08/2017] [Indexed: 12/11/2022] Open
Abstract
Oxidative stress and the resulting damage to genomic DNA are inevitable consequences of endogenous physiological processes, and they are amplified by cellular responses to environmental exposures. One of the most frequent reactions of reactive oxygen species with DNA is the oxidation of guanine to pre-mutagenic 8-oxo-7,8-dihydroguanine (8-oxoG). Despite the vulnerability of guanine to oxidation, vertebrate genes are primarily embedded in GC-rich genomic regions, and over 72% of the promoters of human genes belong to a class with a high GC content. In the promoter, 8-oxoG may serve as an epigenetic mark, and when complexed with the oxidatively inactivated repair enzyme 8-oxoguanine DNA glycosylase 1, provide a platform for the coordination of the initial steps of DNA repair and the assembly of the transcriptional machinery to launch the prompt and preferential expression of redox-regulated genes. Deviations/variations from this artful coordination may be the etiological links between guanine oxidation and various cellular pathologies and diseases during ageing processes.
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Affiliation(s)
- Xueqing Ba
- The Key Laboratory of Molecular Epigenetics of Ministry of Education, Northeast Normal University, Changchun, Jilin 130024, China; School of Life Science, Northeast Normal University, Changchun, Jilin 130024, China.
| | - Istvan Boldogh
- Department of Microbiology and Immunology, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA; Sealy Center for Molecular Medicine, University of Texas Medical Branch at Galveston, Galveston, TX 77555, USA.
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