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Tempka D, Tokarz P, Chmielewska K, Kluska M, Pietrzak J, Rygielska Ż, Virág L, Robaszkiewicz A. Downregulation of PARP1 transcription by CDK4/6 inhibitors sensitizes human lung cancer cells to anticancer drug-induced death by impairing OGG1-dependent base excision repair. Redox Biol 2017; 15:316-326. [PMID: 29306194 PMCID: PMC5975074 DOI: 10.1016/j.redox.2017.12.017] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 12/27/2017] [Accepted: 12/28/2017] [Indexed: 01/24/2023] Open
Abstract
Hallmarks of cancer cells include uncontrolled growth and rapid proliferation; thus, cyclin-dependent kinases are a therapeutic target for cancer treatment. Treating non-small lung cancer cells with sublethal concentrations of the CDK4/6 inhibitors, ribociclib (LEE011) and palbociclib (PD0332991), which are approved by the FDA for anticancer therapies, caused cell cycle arrest in the G1 phase and suppression of poly(ADP-ribose) polymerase 1 (PARP1) transcription by inducing recruitment of the RB1-E2F1-HDAC1-EZH2 repressive complex to the PARP1 promoter. Downregulation of PARP1 made cancer cells vulnerable to death triggered by the anticancer drugs (WP631 and etoposide) and H2O2. All agents brought about redox imbalance and DNA strand breaks. The lack of PARP1 and poly(ADP-ribosyl)ation impaired the 8-oxoguanine glycosylase (OGG1)-dependent base excision DNA repair pathway, which is critical for maintaining the viability of cells treated with CDK4/6 inhibitors during oxidative stress. Upon G1 arrest of PARP1 overexpressing cells, OGG1 formed an immunoprecipitable complex with PARP1. Similar to cells with downregulated PARP1 expression, inhibition of PARP1 or OGG1 in PARP1 overexpressing cells resulted in DNA damage and decreased viability. Thus, PARP1 and OGG1 act in the same regulatory pathway, and PARP1 activity is required for OGG1-mediated repair of oxidative DNA damage in G1-arrested cells. In conclusion, the action of CDK4/6 inhibitors is not limited to the inhibition of cell growth. CDK4/6 inhibitors also lead to accumulation of DNA damage by repressing PARP1 in oxidatively stressed cells. Thus, CDK4/6 inhibitors sensitize G1-arrested cells to anticancer drugs, since these cells require PARP1-OGG1 functional interaction for cell survival. CDK4/6 inhibitors arrest cell proliferation in G1 phase. iCDK4/6 sensitize cells to DNA damage-induced cell death by repressing PARP1. PARP1 is required for OGG1 activity upon growth inhibition. OGG1 repairs DNA damaged by WP631, etoposide, or H2O2 in G1-arrested cells.
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Affiliation(s)
- Dominika Tempka
- Department of General Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Paulina Tokarz
- Department of Molecular Genetics, Institute of Biochemistry, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Kinga Chmielewska
- Department of General Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Magdalena Kluska
- Department of Molecular Genetics, Institute of Biochemistry, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Julita Pietrzak
- Department of General Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - Żaneta Rygielska
- Department of General Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland
| | - László Virág
- Department of Medical Chemistry, Faculty of Medicine, University of Debrecen, Debrecen, Hungary; MTA-DE Cell Biology and Signaling Research Group, Debrecen, Hungary
| | - Agnieszka Robaszkiewicz
- Department of General Biophysics, Institute of Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland.
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Cividini F, Scott BT, Dai A, Han W, Suarez J, Diaz-Juarez J, Diemer T, Casteel DE, Dillmann WH. O-GlcNAcylation of 8-Oxoguanine DNA Glycosylase (Ogg1) Impairs Oxidative Mitochondrial DNA Lesion Repair in Diabetic Hearts. J Biol Chem 2016; 291:26515-26528. [PMID: 27816939 DOI: 10.1074/jbc.m116.754481] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/03/2016] [Indexed: 11/06/2022] Open
Abstract
mtDNA damage in cardiac myocytes resulting from increased oxidative stress is emerging as an important factor in the pathogenesis of diabetic cardiomyopathy. A prevalent lesion that occurs in mtDNA damage is the formation of 8-hydroxy-2'-deoxyguanosine (8-OHdG), which can cause mutations when not repaired properly by 8-oxoguanine DNA glycosylase (Ogg1). Although the mtDNA repair machinery has been described in cardiac myocytes, the regulation of this repair has been incompletely investigated. Here we report that the hearts of type 1 diabetic mice, despite having increased Ogg1 protein levels, had significantly lower Ogg1 activity than the hearts of control, non-type 1 diabetic mice. In diabetic hearts, we further observed increased levels of 8-OHdG and an increased amount of mtDNA damage. Interestingly, Ogg1 was found to be highly O-GlcNAcylated in diabetic mice compared with controls. In vitro experiments demonstrated that O-GlcNAcylation inhibits Ogg1 activity, which could explain the mtDNA lesion accumulation observed in vivo Reducing Ogg1 O-GlcNAcylation in vivo by introducing a dominant negative O-GlcNAc transferase mutant (F460A) restored Ogg1 enzymatic activity and, consequently, reduced 8-OHdG and mtDNA damage despite the adverse hyperglycemic milieu. Taken together, our results implicate hyperglycemia-induced O-GlcNAcylation of Ogg1 in increased mtDNA damage and, therefore, provide a new plausible biochemical mechanism for diabetic cardiomyopathy.
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Affiliation(s)
- Federico Cividini
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Brian T Scott
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Anzhi Dai
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Wenlong Han
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Jorge Suarez
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Julieta Diaz-Juarez
- the Department of Pharmacology, Instituto Nacional de Cardiología, Juan Badiano 41, Barrio Belisario Domínguez Secc XVI, 14080 Tlalpan, DF, Mexico
| | - Tanja Diemer
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Darren E Casteel
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
| | - Wolfgang H Dillmann
- From the Department of Medicine, University of California, San Diego, La Jolla, California 92093-0671 and
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Pan L, Zhu B, Hao W, Zeng X, Vlahopoulos SA, Hazra TK, Hegde ML, Radak Z, Bacsi A, Brasier AR, Ba X, Boldogh I. Oxidized Guanine Base Lesions Function in 8-Oxoguanine DNA Glycosylase-1-mediated Epigenetic Regulation of Nuclear Factor κB-driven Gene Expression. J Biol Chem 2016; 291:25553-25566. [PMID: 27756845 DOI: 10.1074/jbc.m116.751453] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/14/2016] [Indexed: 11/06/2022] Open
Abstract
A large percentage of redox-responsive gene promoters contain evolutionarily conserved guanine-rich clusters; guanines are the bases most susceptible to oxidative modification(s). Consequently, 7,8-dihydro-8-oxoguanine (8-oxoG) is one of the most abundant base lesions in promoters and is primarily repaired via the 8-oxoguanine DNA glycosylase-1 (OOG1)-initiated base excision repair pathway. In view of a prompt cellular response to oxidative challenge, we hypothesized that the 8-oxoG lesion and the cognate repair protein OGG1 are utilized in transcriptional gene activation. Here, we document TNFα-induced enrichment of both 8-oxoG and OGG1 in promoters of pro-inflammatory genes, which precedes interaction of NF-κB with its DNA-binding motif. OGG1 bound to 8-oxoG upstream from the NF-κB motif increased its DNA occupancy by promoting an on-rate of both homodimeric and heterodimeric forms of NF-κB. OGG1 depletion decreased both NF-κB binding and gene expression, whereas Nei-like glycosylase-1 and -2 had a marginal effect. These results are the first to document a novel paradigm wherein the DNA repair protein OGG1 bound to its substrate is coupled to DNA occupancy of NF-κB and functions in epigenetic regulation of gene expression.
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Affiliation(s)
- Lang Pan
- From the Departments of Microbiology and Immunology and.,the Key Laboratory of Molecular Epigenetics, Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China, and
| | - Bing Zhu
- From the Departments of Microbiology and Immunology and
| | - Wenjing Hao
- the Key Laboratory of Molecular Epigenetics, Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China, and
| | - Xianlu Zeng
- the Key Laboratory of Molecular Epigenetics, Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China, and
| | | | - Tapas K Hazra
- Medicine, and.,the Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas 77555
| | - Muralidhar L Hegde
- the Department of Radiation Oncology and Neurology, Methodist Research Institute, Houston, Texas 77030
| | - Zsolt Radak
- From the Departments of Microbiology and Immunology and
| | - Attila Bacsi
- From the Departments of Microbiology and Immunology and
| | - Allan R Brasier
- Medicine, and.,the Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas 77555
| | - Xueqing Ba
- From the Departments of Microbiology and Immunology and .,the Key Laboratory of Molecular Epigenetics, Ministry of Education, Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China, and
| | - Istvan Boldogh
- From the Departments of Microbiology and Immunology and .,the Sealy Center for Molecular Medicine, University of Texas Medical Branch, Galveston, Texas 77555
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Kaur S, Coulombe Y, Ramdzan ZM, Leduy L, Masson JY, Nepveu A. Special AT-rich Sequence-binding Protein 1 (SATB1) Functions as an Accessory Factor in Base Excision Repair. J Biol Chem 2016; 291:22769-22780. [PMID: 27590341 DOI: 10.1074/jbc.m116.735696] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/01/2016] [Indexed: 01/19/2023] Open
Abstract
Base excision repair is initiated by DNA glycosylases that recognize specific altered bases. DNA glycosylases for oxidized bases carry both a glycosylase activity that removes the faulty base and an apyrimidinic/apurinic lyase activity that introduces a single-strand DNA incision. In particular, the CUT domains within the CUX1 and CUX2 proteins were recently shown to interact with the 8-oxoguanine (8-oxoG) DNA glycosylase and stimulate its enzymatic activities. SATB1, which contains two CUT domains, was originally characterized as a T cell-specific genome organizer whose aberrant overexpression in breast cancer can promote tumor progression. Here we investigated the involvement of SATB1 in DNA repair. SATB1 knockdown caused a delay in DNA repair following exposure to H2O2, an increase in OGG1-sensitive oxidized bases within genomic DNA, and a decrease in 8-oxoG cleavage activity in cell extracts. In parallel, we observed an increase in phospho-CHK1 and γ-H2AX levels and a decrease in DNA synthesis. Conversely, ectopic expression of SATB1 accelerated DNA repair and reduced the levels of oxidized bases in genomic DNA. Moreover, an enhanced GFP-SATB1 fusion protein was rapidly recruited to laser microirradiation-induced DNA damage. Using purified proteins, we showed that SATB1 interacts directly with OGG1, increases its binding to 8-oxoG-containing DNA, promotes Schiff base formation, and stimulates its glycosylase and apyrimidinic/apurinic lyase enzymatic activities. Structure/function analysis demonstrated that CUT domains, but not the homeodomain, are responsible for the stimulation of OGG1. Together, these results identify another CUT domain protein that functions both as a transcription factor and an accessory factor in base excision repair.
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Affiliation(s)
- Simran Kaur
- From the Goodman Cancer Research Centre and.,Departments of Biochemistry
| | - Yan Coulombe
- the Genome Stability Laboratory, CHU de Québec Research Center, Québec City, Québec G1R 2J6, Canada, and.,the Department of Molecular Biology, Medical Biochemistry, and Pathology, Laval University Cancer Research Center, Québec City, Québec G1V 0A6, Canada
| | | | - Lam Leduy
- From the Goodman Cancer Research Centre and
| | - Jean-Yves Masson
- the Genome Stability Laboratory, CHU de Québec Research Center, Québec City, Québec G1R 2J6, Canada, and.,the Department of Molecular Biology, Medical Biochemistry, and Pathology, Laval University Cancer Research Center, Québec City, Québec G1V 0A6, Canada
| | - Alain Nepveu
- From the Goodman Cancer Research Centre and .,Departments of Biochemistry.,Oncology, and.,Medicine, McGill University, Montreal, Quebec H3A 1A3, Canada
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Cilli P, Minoprio A, Bossa C, Bignami M, Mazzei F. Formation and Repair of Mismatches Containing Ribonucleotides and Oxidized Bases at Repeated DNA Sequences. J Biol Chem 2015; 290:26259-69. [PMID: 26338705 PMCID: PMC4646274 DOI: 10.1074/jbc.m115.679209] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 09/02/2015] [Indexed: 11/06/2022] Open
Abstract
The cellular pool of ribonucleotide triphosphates (rNTPs) is higher than that of deoxyribonucleotide triphosphates. To ensure genome stability, DNA polymerases must discriminate against rNTPs and incorporated ribonucleotides must be removed by ribonucleotide excision repair (RER). We investigated DNA polymerase β (POL β) capacity to incorporate ribonucleotides into trinucleotide repeated DNA sequences and the efficiency of base excision repair (BER) and RER enzymes (OGG1, MUTYH, and RNase H2) when presented with an incorrect sugar and an oxidized base. POL β incorporated rAMP and rCMP opposite 7,8-dihydro-8-oxoguanine (8-oxodG) and extended both mispairs. In addition, POL β was able to insert and elongate an oxidized rGMP when paired with dA. We show that RNase H2 always preserves the capacity to remove a single ribonucleotide when paired to an oxidized base or to incise an oxidized ribonucleotide in a DNA duplex. In contrast, BER activity is affected by the presence of a ribonucleotide opposite an 8-oxodG. In particular, MUTYH activity on 8-oxodG:rA mispairs is fully inhibited, although its binding capacity is retained. This results in the reduction of RNase H2 incision capability of this substrate. Thus complex mispairs formed by an oxidized base and a ribonucleotide can compromise BER and RER in repeated sequences.
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Affiliation(s)
- Piera Cilli
- From the Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Roma and the Department of Science, University Roma Tre, 00154 Roma, Italy
| | - Anna Minoprio
- From the Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Roma and
| | - Cecilia Bossa
- From the Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Roma and
| | - Margherita Bignami
- From the Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Roma and
| | - Filomena Mazzei
- From the Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Roma and
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Pal R, Ramdzan ZM, Kaur S, Duquette PM, Marcotte R, Leduy L, Davoudi S, Lamarche-Vane N, Iulianella A, Nepveu A. CUX2 protein functions as an accessory factor in the repair of oxidative DNA damage. J Biol Chem 2015. [PMID: 26221032 DOI: 10.1074/jbc.m115.651042] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
CUX1 and CUX2 proteins are characterized by the presence of three highly similar regions called Cut repeats 1, 2, and 3. Although CUX1 is ubiquitously expressed, CUX2 plays an important role in the specification of neuronal cells and continues to be expressed in postmitotic neurons. Cut repeats from the CUX1 protein were recently shown to stimulate 8-oxoguanine DNA glycosylase 1 (OGG1), an enzyme that removes oxidized purines from DNA and introduces a single strand break through its apurinic/apyrimidinic lyase activity to initiate base excision repair. Here, we investigated whether CUX2 plays a similar role in the repair of oxidative DNA damage. Cux2 knockdown in embryonic cortical neurons increased levels of oxidative DNA damage. In vitro, Cut repeats from CUX2 increased the binding of OGG1 to 7,8-dihydro-8-oxoguanine-containing DNA and stimulated both the glycosylase and apurinic/apyrimidinic lyase activities of OGG1. Genetic inactivation in mouse embryo fibroblasts or CUX2 knockdown in HCC38 cells delayed DNA repair and increased DNA damage. Conversely, ectopic expression of Cut repeats from CUX2 accelerated DNA repair and reduced levels of oxidative DNA damage. These results demonstrate that CUX2 functions as an accessory factor that stimulates the repair of oxidative DNA damage. Neurons produce a high level of reactive oxygen species because of their dependence on aerobic oxidation of glucose as their source of energy. Our results suggest that the persistent expression of CUX2 in postmitotic neurons contributes to the maintenance of genome integrity through its stimulation of oxidative DNA damage repair.
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Affiliation(s)
| | | | - Simran Kaur
- From the Goodman Cancer Research Centre and Departments of Biochemistry
| | - Philippe M Duquette
- Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 1A3, Canada
| | - Richard Marcotte
- Princess Margaret Cancer Centre, University Health Network, Toronto M5G 1L7, Canada, and
| | - Lam Leduy
- From the Goodman Cancer Research Centre and
| | | | | | - Angelo Iulianella
- Department of Medical Neuroscience, Dalhousie University, Life Science Research Institute, Halifax B3H 4R2, Canada
| | - Alain Nepveu
- From the Goodman Cancer Research Centre and Departments of Biochemistry, Medicine, Oncology, and
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