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Titov RA, Minina VI, Torgunakova AV, Buslaev VY, Voronina EN, Prosekov AY, Titov VA, Glushkov AN. Studying the Role of DNA Repair Gene Polymorphism in Formation of Predisposition to Lung Cancer Development in Women. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422020132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Micronuclei Formation upon Radioiodine Therapy for Well-Differentiated Thyroid Cancer: The Influence of DNA Repair Genes Variants. Genes (Basel) 2020; 11:genes11091083. [PMID: 32957448 PMCID: PMC7565468 DOI: 10.3390/genes11091083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/07/2020] [Accepted: 09/15/2020] [Indexed: 12/13/2022] Open
Abstract
Radioiodine therapy with 131I remains the mainstay of standard treatment for well-differentiated thyroid cancer (DTC). Prognosis is good but concern exists that 131I-emitted ionizing radiation may induce double-strand breaks in extra-thyroidal tissues, increasing the risk of secondary malignancies. We, therefore, sought to evaluate the induction and 2-year persistence of micronuclei (MN) in lymphocytes from 26 131I-treated DTC patients and the potential impact of nine homologous recombination (HR), non-homologous end-joining (NHEJ), and mismatch repair (MMR) polymorphisms on MN levels. MN frequency was determined by the cytokinesis-blocked micronucleus assay while genotyping was performed through pre-designed TaqMan® Assays or conventional PCR-restriction fragment length polymorphism (RFLP). MN levels increased significantly one month after therapy and remained persistently higher than baseline for 2 years. A marked reduction in lymphocyte proliferation capacity was also apparent 2 years after therapy. MLH1 rs1799977 was associated with MN frequency (absolute or net variation) one month after therapy, in two independent groups. Significant associations were also observed for MSH3 rs26279, MSH4 rs5745325, NBN rs1805794, and tumor histotype. Overall, our results suggest that 131I therapy may pose a long-term challenge to cells other than thyrocytes and that the individual genetic profile may influence 131I sensitivity, hence its risk-benefit ratio. Further studies are warranted to confirm the potential utility of these single nucleotide polymorphisms (SNPs) as radiogenomic biomarkers in the personalization of radioiodine therapy.
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Hosseini SM, Mohammadiasl J, Talaiezadeh A, Alidadi R, Bijanzadeh M. Influence of Two DNA Repair Pathway Polymorphisms in Colorectal Cancer Risk in Southwest Iran. Asian Pac J Cancer Prev 2020; 21:1919-1924. [PMID: 32711416 PMCID: PMC7573413 DOI: 10.31557/apjcp.2020.21.7.1919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Indexed: 11/25/2022] Open
Abstract
Objective: X-ray cross-complementing group 1 (XRCC1) and 8 Oxo guanine DNA-glycosylase 1 (OGG1) genes are implicated in the repair of single-stranded breaks (SSBRs) and base excision repair (BER) pathways. Common polymorphisms in DNA repair genes are supposed to decrease the capability of DNA repair and cause genetic instability. This study was designed to investigate the association between XRCC1 (rs25487) and OGG1 (rs1052133) polymorphisms and susceptibility to colorectal cancer (CRC) in the Ahvaz city, south-west Iran. Methods: This case- control study comprised 150 patients and 150 controls that were selected from 2 educational hospitals in Ahvaz. They were matched for age and gender, and their genotyping was carried out by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Results: Our results indicate that the frequency of the Gln (A) allele of XRCC1 (rs25487) is significantly higher in colorectal cancer patients, compare to controls (p = 0.01, OR: 1.54, 95% CI 1.9–13.3). Significant increased risk of cancer was observed in XRCC1 (rs25487) genotypes (p = 0.001 OR: 5.3, 95% CI 1.9–14.2 for Gln / Gln), while no association was found between OGG1 (rs1052133) and colorectal cancer risk (p = 0.6). Conclusion: Our study suggests that XRCC1 (rs25487) polymorphism might be associated with an increasing risk of CRC in Ahvaz. It also demonstrates positive correlation between the XRCC1 (rs25487) genotypes and demographic characteristics, such as smoking and increased age in patients and control groups.
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Affiliation(s)
- Seyed Mohammad Hosseini
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Javad Mohammadiasl
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Abdulhasan Talaiezadeh
- Cancer, Environmental and Petroleum Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of General Surgery, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Rahim Alidadi
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mahdi Bijanzadeh
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Cancer, Environmental and Petroleum Pollutants Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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4
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Oxidative Damage in Sporadic Colorectal Cancer: Molecular Mapping of Base Excision Repair Glycosylases in Colorectal Cancer Patients. Int J Mol Sci 2020; 21:ijms21072473. [PMID: 32252452 PMCID: PMC7177219 DOI: 10.3390/ijms21072473] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 12/12/2022] Open
Abstract
Oxidative stress with subsequent premutagenic oxidative DNA damage has been implicated in colorectal carcinogenesis. The repair of oxidative DNA damage is initiated by lesion-specific DNA glycosylases (hOGG1, NTH1, MUTYH). The direct evidence of the role of oxidative DNA damage and its repair is proven by hereditary syndromes (MUTYH-associated polyposis, NTHL1-associated tumor syndrome), where germline mutations cause loss-of-function in glycosylases of base excision repair, thus enabling the accumulation of oxidative DNA damage and leading to the adenoma-colorectal cancer transition. Unrepaired oxidative DNA damage often results in G:C>T:A mutations in tumor suppressor genes and proto-oncogenes and widespread occurrence of chromosomal copy-neutral loss of heterozygosity. However, the situation is more complicated in complex and heterogeneous disease, such as sporadic colorectal cancer. Here we summarized our current knowledge of the role of oxidative DNA damage and its repair on the onset, prognosis and treatment of sporadic colorectal cancer. Molecular and histological tumor heterogeneity was considered. Our study has also suggested an additional important source of oxidative DNA damage due to intestinal dysbiosis. The roles of base excision repair glycosylases (hOGG1, MUTYH) in tumor and adjacent mucosa tissues of colorectal cancer patients, particularly in the interplay with other factors (especially microenvironment), deserve further attention. Base excision repair characteristics determined in colorectal cancer tissues reflect, rather, a disease prognosis. Finally, we discuss the role of DNA repair in the treatment of colon cancer, since acquired or inherited defects in DNA repair pathways can be effectively used in therapy.
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5
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Chen H, Wang H, Liu J, Cheng Q, Chen X, Ye F. Association of the MUTYH Gln324His (CAG/CAC) variant with cervical carcinoma and HR-HPV infection in a Chinese population. Medicine (Baltimore) 2019; 98:e15359. [PMID: 31027119 PMCID: PMC6831372 DOI: 10.1097/md.0000000000015359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This study was performed to investigate the relationship between the MUTYH Gln324His (CAG/CAC) genotype and risk of cervical squamous cell carcinoma (CSCC) in a case-control setting. Mismatch amplification-polymerase chain reaction (MA-PCR) was applied to detect the polymorphism in 400 CSCC, 400 CIN III and 1200 control participants. The homozygous His324His (CAC/CAC) genotype of MUTYH was associated with significantly increased risk of CIN III (OR = 1.94) and CSCC (OR = 3.83). Increased risk of CIN III (OR = 1.34) and CSCC (OR = 1.97) was additionally observed with the heterozygous CAG/CAC genotype. Overall, individuals in both CAC/CAC and CAG/CAC genotype groups were at higher risk of cervical carcinoma (CINIII (OR = 1.46) and CSCC (OR = 2.34)). Within the HR-HPV infection-positive group, CAC/CAC and CAG/CAC genotypes were significantly enriched in relation to CIN III and CSCC. Moreover, we observed a positive correlation between the proportion of homozygous CAC/CAC MUTYH genotype and malignant prognostic factors of CSCC, such as cell differentiation grade and lymph node metastasis. These findings clearly highlight associations between the MUTYH Gln324His (CAG/CAC) polymorphism and susceptibility to CSCC, HR-HPV infection and specific prognostic factors, supporting the utility of this variant as an early indicator for patients at high risk of cervical carcinoma.
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Affiliation(s)
- Huaizeng Chen
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University
| | - Hanzhi Wang
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University
| | - Jia Liu
- Department of Obstetrics and Gynecology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, PR China
| | - Qi Cheng
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University
| | - Xiaojing Chen
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University
| | - Feng Ye
- Women's Reproductive Health Key Laboratory of Zhejiang Province, Women's Hospital, School of Medicine, Zhejiang University
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6
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Manuguerra S, Espinosa Ruiz C, Santulli A, Messina CM. Sub-lethal Doses of Polybrominated Diphenyl Ethers, in Vitro, Promote Oxidative Stress and Modulate Molecular Markers Related to Cell Cycle, Antioxidant Balance and Cellular Energy Management. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16040588. [PMID: 30781636 PMCID: PMC6406823 DOI: 10.3390/ijerph16040588] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 01/08/2023]
Abstract
In the present study, we evaluated the effects of different concentrations of the polybrominated diphenyl ethers (PBDEs) BDE-209, BDE-47 and BDE-99, on the vitality and oxidative stress of a HS-68 human cell culture exposed to the compounds for three days. The results showed that for this exposure time, only the highest concentrations produced a significant vitality reduction and oxidative stress induction (p < 0.05), measured as reactive oxygen species (ROS). Subsequently, in order to verify the effects of sub-lethal doses, cells were exposed for a longer time and data collected, after 12 and 20 days, to study ROS production and some molecular markers related to cell cycle and stress (p53, pRB, PARP, c-Jun and c-Fos), antioxidant status and proliferation (ERK, c-Jun and c-Fos), energy balance (NRF2, AMPK, HIF). Most of the biomarkers were influenced by the treatments, indicating that sub-lethal doses of PBDEs, for longer time, can enhance the production of ROS, altering the energetic metabolism, cell cycle and antioxidant balance, determining possible negative effects on the cell proliferation equilibrium.
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Affiliation(s)
- Simona Manuguerra
- Department of Earth and Sea Science, Laboratory of Marine Biochemistry and Ecotoxicology, University of Palermo, Via Barlotta 4, 91100 Trapani, Italy.
| | - Cristóbal Espinosa Ruiz
- Department of Earth and Sea Science, Laboratory of Marine Biochemistry and Ecotoxicology, University of Palermo, Via Barlotta 4, 91100 Trapani, Italy.
| | - Andrea Santulli
- Department of Earth and Sea Science, Laboratory of Marine Biochemistry and Ecotoxicology, University of Palermo, Via Barlotta 4, 91100 Trapani, Italy.
- Marine Biology Institute, Consorzio Universitario della Provincia di Trapani, Via Barlotta 4, 91100 Trapani, Italy.
| | - Concetta Maria Messina
- Department of Earth and Sea Science, Laboratory of Marine Biochemistry and Ecotoxicology, University of Palermo, Via Barlotta 4, 91100 Trapani, Italy.
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7
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Vodicka P, Musak L, Vodickova L, Vodenkova S, Catalano C, Kroupa M, Naccarati A, Polivkova Z, Vymetalkova V, Försti A, Hemminki K. Genetic variation of acquired structural chromosomal aberrations. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 836:13-21. [PMID: 30389156 DOI: 10.1016/j.mrgentox.2018.05.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/24/2018] [Accepted: 05/10/2018] [Indexed: 12/21/2022]
Abstract
Human malignancies are often hallmarked with genomic instability, which itself is also considered a causative event in malignant transformation. Genomic instability may manifest itself as genetic changes in the nucleotide sequence of DNA, or as structural or numerical changes of chromosomes. Unrepaired or insufficiently repaired DNA double-strand breaks, as well as telomere shortening, are important contributors in the formation of structural chromosomal aberrations (CAs). In the present review, we discuss potential mechanisms behind the formation of CAs and their relation to cancer. Based on our own studies, we also illustrate how inherited genetic variation may modify the frequency and types of CAs occurring in humans. Recently, we published a series of studies on variations in genes relevant to maintaining genomic integrity, such as those encoding xenobiotic-metabolising enzymes, DNA repair, the tumour suppressor TP53, the spindle assembly checkpoint, and cyclin D1 (CCND1). While individually genetic variation in these genes exerted small modulating effects, in interactions they were associated with CA frequencies in peripheral blood lymphocytes of healthy volunteers. Moreover, we observed opposite associations between the CCND1 splice site polymorphism rs9344 G870A and the frequency of CAs compared to their association with translocation t(11,14). We discuss the functional consequences of the CCND1 gene in interplay with DNA damage response and DNA repair during malignant transformation. Our review summarizes existing evidence that gene variations in relevant cellular pathways modulate the frequency of CAs, predominantly in a complex interaction. More functional/mechanistic studies elucidating these observations are required. Several questions emerge, such as the role of CAs in malignancies with respect to a particular phenotype and heterogeneity, the formation of CAs during the process of malignant transformation, and the formation of CAs in individual types of lymphocytes in relation to the immune response.
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Affiliation(s)
- Pavel Vodicka
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, Prague, 12800, Czech Republic; Faculty of Medicine and Biomedical Center in Pilsen, Charles University, Pilsen, 30605, Czech Republic.
| | - Ludovit Musak
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine, Martin, 03601, Slovakia
| | - Ludmila Vodickova
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, Prague, 12800, Czech Republic; Faculty of Medicine and Biomedical Center in Pilsen, Charles University, Pilsen, 30605, Czech Republic
| | - Sona Vodenkova
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, Prague, 12800, Czech Republic; Department of Medical Genetics, Third Faculty of Medicine, Charles University, Prague, 10000, Czech Republic
| | - Calogerina Catalano
- Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, D69120, Germany
| | - Michal Kroupa
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Faculty of Medicine and Biomedical Center in Pilsen, Charles University, Pilsen, 30605, Czech Republic
| | - Alessio Naccarati
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Italian Institute for Genomic Medicine (IIGM), Torino, 10126, Italy
| | - Zdena Polivkova
- Department of Medical Genetics, Third Faculty of Medicine, Charles University, Prague, 10000, Czech Republic
| | - Veronika Vymetalkova
- Department of Molecular Biology of Cancer, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, 14220, Czech Republic; Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University, Prague, 12800, Czech Republic; Faculty of Medicine and Biomedical Center in Pilsen, Charles University, Pilsen, 30605, Czech Republic
| | - Asta Försti
- Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, D69120, Germany; Center for Primary Health Care Research, Lund University, Malmö, 214 28, Sweden
| | - Kari Hemminki
- Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, D69120, Germany; Center for Primary Health Care Research, Lund University, Malmö, 214 28, Sweden
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8
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Gotoh N, Saitoh T, Takahashi N, Kasamatsu T, Minato Y, Lobna A, Oda T, Hoshino T, Sakura T, Shimizu H, Takizawa M, Handa H, Yokohama A, Tsukamoto N, Murakami H. Association between OGG1 S326C CC genotype and elevated relapse risk in acute myeloid leukemia. Int J Hematol 2018; 108:246-253. [PMID: 29737460 DOI: 10.1007/s12185-018-2464-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 04/24/2018] [Accepted: 04/25/2018] [Indexed: 11/28/2022]
Abstract
Recent studies have shown that tumors of relapsed acute myeloid leukemia (AML) present additional genetic mutations compared to the primary tumors. The base excision repair (BER) pathway corrects oxidatively damaged mutagenic bases and plays an important role in maintaining genetic stability. The purpose of the present study was to investigate the relationship between BER functional polymorphisms and AML relapse. We focused on five major polymorphisms: OGG1 S326C, MUTYH Q324H, APE1 D148E, XRCC1 R194W, and XRCC1 R399Q. Ninety-four adults with AML who achieved first complete remission were recruited. Genotyping was performed with the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. The OGG1 S326C CC genotype (associated with lower OGG1 activity) was observed more frequently in patients with AML relapse [28.9 vs. 8.9%, odds ratio (OR) = 4.10, 95% confidence interval (CI) = 1.35-12.70, P = 0.01]. Patients with the CC genotype exhibited shorter relapse-free survival (RFS). Moreover, the TCGA database suggested that low OGG1 expression in AML cells is associated with a higher frequency of mutations. The present findings suggest that the OGG1 S326C polymorphism increased the probability of AML relapse and may be useful as a prognostic factor for AML relapse risk.
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Affiliation(s)
- Nanami Gotoh
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan
| | - Takayuki Saitoh
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan.
| | - Noriyuki Takahashi
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan
| | - Tetsuhiro Kasamatsu
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan
| | - Yusuke Minato
- Department of Virology and Preventive Medicine, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Alkebsi Lobna
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan
| | - Tsukasa Oda
- Laboratory of Molecular Genetics, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Takumi Hoshino
- Leukemia Research Center, Saiseikai Maebashi Hospital, Gunma, Japan
| | - Toru Sakura
- Leukemia Research Center, Saiseikai Maebashi Hospital, Gunma, Japan
| | | | - Makiko Takizawa
- Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Hiroshi Handa
- Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma, Japan
| | - Akihiko Yokohama
- Division of Blood Transfusion Service, Gunma University Hospital, Gunma, Japan
| | | | - Hirokazu Murakami
- Graduate School of Health Sciences, Gunma University, 3-39-22 Showa-machi, Maebashi, Gunma, 371-8514, Japan
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9
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Dutto I, Scalera C, Prosperi E. CREBBP and p300 lysine acetyl transferases in the DNA damage response. Cell Mol Life Sci 2018; 75:1325-1338. [PMID: 29170789 PMCID: PMC11105205 DOI: 10.1007/s00018-017-2717-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 11/16/2017] [Accepted: 11/20/2017] [Indexed: 12/21/2022]
Abstract
The CREB-binding protein (CREBBP, or in short CBP) and p300 are lysine (K) acetyl transferases (KAT) belonging to the KAT3 family of proteins known to modify histones, as well as non-histone proteins, thereby regulating chromatin accessibility and transcription. Previous studies have indicated a tumor suppressor function for these enzymes. Recently, they have been found to acetylate key factors involved in DNA replication, and in different DNA repair processes, such as base excision repair, nucleotide excision repair, and non-homologous end joining. The growing list of CBP/p300 substrates now includes factors involved in DNA damage signaling, and in other pathways of the DNA damage response (DDR). This review will focus on the role of CBP and p300 in the acetylation of DDR proteins, and will discuss how this post-translational modification influences their functions at different levels, including catalytic activity, DNA binding, nuclear localization, and protein turnover. In addition, we will exemplify how these functions may be necessary to efficiently coordinate the spatio-temporal response to DNA damage. CBP and p300 may contribute to genome stability by fine-tuning the functions of DNA damage signaling and DNA repair factors, thereby expanding their role as tumor suppressors.
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Affiliation(s)
- Ilaria Dutto
- Istituto di Genetica Molecolare del CNR, Via Abbiategrasso 207, 27100, Pavia, Italy
- IRB, Carrer Baldiri Reixac 10, 08028, Barcelona, Spain
| | - Claudia Scalera
- Istituto di Genetica Molecolare del CNR, Via Abbiategrasso 207, 27100, Pavia, Italy
| | - Ennio Prosperi
- Istituto di Genetica Molecolare del CNR, Via Abbiategrasso 207, 27100, Pavia, Italy.
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10
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Yang B, Fung A, Pac-Soo C, Ma D. Vascular surgery-related organ injury and protective strategies: update and future prospects. Br J Anaesth 2016; 117:ii32-ii43. [DOI: 10.1093/bja/aew211] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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11
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Soares JP, Silva AI, Silva AM, Almeida V, Teixeira JP, Matos M, Gaivão I, Mota MP. Effects of physical exercise training in DNA damage and repair activity in humans with different genetic polymorphisms of hOGG1 (Ser326Cys). Cell Biochem Funct 2015; 33:519-24. [PMID: 26592168 DOI: 10.1002/cbf.3134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 07/20/2015] [Accepted: 08/10/2015] [Indexed: 01/06/2023]
Abstract
The main purpose of this pilot study was to investigate the possible influence of genetic polymorphisms of the hOGG1 (Ser326Cys) gene in DNA damage and repair activity by 8-oxoguanine DNA glycosylase 1 (OGG1 enzyme) in response to 16 weeks of combined physical exercise training. Thirty-two healthy Caucasian men (40-74 years old) were enrolled in this study. All the subjects were submitted to a training of 16 weeks of combined physical exercise. The subjects with Ser/Ser genotype were considered as wild-type group (WTG), and Ser/Cys and Cys/Cys genotype were analysed together as mutant group (MG). We used comet assay in conjunction with formamidopyrimidine DNA glycoslyase (FPG) to analyse both strand breaks and FPG-sensitive sites. DNA repair activity were also analysed with the comet assay technique. Our results showed no differences between DNA damage (both strand breaks and FPG-sensitive sites) and repair activity (OGG1) between genotype groups (in the pre-training condition). Regarding the possible influence of genotype in the response to 16 weeks of physical exercise training, the results revealed a decrease in DNA strand breaks in both groups, a decrease in FPG-sensitive sites and an increase in total antioxidant capacity in the WTG, but no changes were found in MG. No significant changes in DNA repair activity was observed in both genotype groups with physical exercise training. This preliminary study suggests the possibility of different responses in DNA damage to the physical exercise training, considering the hOGG1 Ser326Cys polymorphism.
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Affiliation(s)
- Jorge Pinto Soares
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Research Center in Sports Sciences, Health and Human Development, CIDESD, UTAD, Vila Real, Portugal
| | - Ana Inês Silva
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
| | - Amélia M Silva
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Centre for Research and Technology of Agro-Environmental and Biological Sciences, CITAB, UTAD, Vila Real, Portugal
| | - Vanessa Almeida
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Research Center in Sports Sciences, Health and Human Development, CIDESD, UTAD, Vila Real, Portugal
| | - João Paulo Teixeira
- Department of Environment Health, Portuguese National Institute of Health, Rua Alexandre Herculano 321, Porto 4000-055, Portugal
| | - Manuela Matos
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Centre of Agricultural Genomics and Biotechnology, CGBA, UTAD, Vila Real, Portugal
| | - Isabel Gaivão
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Animal and Veterinary Research Centre, CECAV, UTAD, Vila Real, Portugal
| | - Maria Paula Mota
- University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.,Research Center in Sports Sciences, Health and Human Development, CIDESD, UTAD, Vila Real, Portugal
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12
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Vodicka P, Musak L, Frank C, Kazimirova A, Vymetalkova V, Barancokova M, Smolkova B, Dzupinkova Z, Jiraskova K, Vodenkova S, Kroupa M, Osina O, Naccarati A, Palitti F, Försti A, Dusinska M, Vodickova L, Hemminki K. Interactions of DNA repair gene variants modulate chromosomal aberrations in healthy subjects. Carcinogenesis 2015; 36:1299-306. [DOI: 10.1093/carcin/bgv127] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 08/20/2015] [Indexed: 11/14/2022] Open
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13
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Environmental carcinogens and mutational pathways in atherosclerosis. Int J Hyg Environ Health 2015; 218:293-312. [DOI: 10.1016/j.ijheh.2015.01.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 01/26/2015] [Accepted: 01/29/2015] [Indexed: 02/07/2023]
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14
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Ischaemic conditioning strategies reduce ischaemia/reperfusion-induced organ injury. Br J Anaesth 2015; 114:204-16. [DOI: 10.1093/bja/aeu302] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
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15
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Khadzhieva MB, Lutcenko NN, Volodin IV, Morozova KV, Salnikova LE. Association of oxidative stress-related genes with idiopathic recurrent miscarriage. Free Radic Res 2014; 48:534-41. [DOI: 10.3109/10715762.2014.891735] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Abstract
SIGNIFICANCE Human apurinic/apyrimidinic endonuclease 1 (APE1, also known as REF-1) was isolated based on its ability to cleave at AP sites in DNA or activate the DNA binding activity of certain transcription factors. We review herein topics related to this multi-functional DNA repair and stress-response protein. RECENT ADVANCES APE1 displays homology to Escherichia coli exonuclease III and is a member of the divalent metal-dependent α/β fold-containing phosphoesterase superfamily of enzymes. APE1 has acquired distinct active site and loop elements that dictate substrate selectivity, and a unique N-terminus which at minimum imparts nuclear targeting and interaction specificity. Additional activities ascribed to APE1 include 3'-5' exonuclease, 3'-repair diesterase, nucleotide incision repair, damaged or site-specific RNA cleavage, and multiple transcription regulatory roles. CRITICAL ISSUES APE1 is essential for mouse embryogenesis and contributes to cell viability in a genetic background-dependent manner. Haploinsufficient APE1(+/-) mice exhibit reduced survival, increased cancer formation, and cellular/tissue hyper-sensitivity to oxidative stress, supporting the notion that impaired APE1 function associates with disease susceptibility. Although abnormal APE1 expression/localization has been seen in cancer and neuropathologies, and impaired-function variants have been described, a causal link between an APE1 defect and human disease remains elusive. FUTURE DIRECTIONS Ongoing efforts aim at delineating the biological role(s) of the different APE1 activities, as well as the regulatory mechanisms for its intra-cellular distribution and participation in diverse molecular pathways. The determination of whether APE1 defects contribute to human disease, particularly pathologies that involve oxidative stress, and whether APE1 small-molecule regulators have clinical utility, is central to future investigations.
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Affiliation(s)
- Mengxia Li
- Intramural Research Program, Laboratory of Molecular Gerontology, National Institute on Aging, National Institutes of Health , Baltimore, Maryland
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17
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Simonelli V, Camerini S, Mazzei F, Van Loon B, Allione A, D'Errico M, Barone F, Minoprio A, Ricceri F, Guarrera S, Russo A, Dalhus B, Crescenzi M, Hübscher U, Bjørås M, Matullo G, Dogliotti E. Genotype-phenotype analysis of S326C OGG1 polymorphism: a risk factor for oxidative pathologies. Free Radic Biol Med 2013; 63:401-9. [PMID: 23726996 DOI: 10.1016/j.freeradbiomed.2013.05.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2013] [Revised: 05/07/2013] [Accepted: 05/21/2013] [Indexed: 12/18/2022]
Abstract
8-Oxoguanine DNA glycosylase (OGG) activity was measured by an in vitro assay in lymphocytes of healthy volunteers genotyped for various OGG1 polymorphisms. Only homozygous carriers of the polymorphic C326 allele showed a significantly lower OGG activity compared to the homozygous S326 genotype. The purified S326C OGG1 showed a decreased ability to complete the repair synthesis step in a base excision repair reaction reconstituted in vitro. The propensity of this variant to dimerize as well as its catalytic impairment were shown to be enhanced under oxidizing conditions. Mass spectrometry revealed that the extra cysteine of the variant protein is involved in disulfide bonds compatible with significant conformational changes and/or dimerization. We propose that the S326C OGG1 catalytic impairment and its susceptibility to dimerization and disulfide bond formation in an oxidizing environment all concur to decrease repair capacity. Consequently, the C326 homozygous carriers may be at increased risk of oxidative pathologies.
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Affiliation(s)
- Valeria Simonelli
- Department of Environment and Primary Prevention, Istituto Superiore di Sanità, 00161 Rome, Italy
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18
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Allione A, Guarrera S, Russo A, Ricceri F, Purohit R, Pagnani A, Rosa F, Polidoro S, Voglino F, Matullo G. Inter-individual variation in nucleotide excision repair pathway is modulated by non-synonymous polymorphisms in ERCC4 and MBD4 genes. Mutat Res 2013; 751-752:49-54. [PMID: 24004570 DOI: 10.1016/j.mrfmmm.2013.08.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 08/21/2013] [Accepted: 08/23/2013] [Indexed: 02/08/2023]
Abstract
Inter-individual differences in DNA repair capacity (DRC) may lead to genome instability and, consequently, modulate individual cancer risk. Among the different DNA repair pathways, nucleotide excision repair (NER) is one of the most versatile, as it can eliminate a wide range of helix-distorting DNA lesions caused by ultraviolet light irradiation and chemical mutagens. We performed a genotype-phenotype correlation study in 122 healthy subjects in order to assess if any associations exist between phenotypic profiles of NER and DNA repair gene single nucleotide polymorphisms (SNPs). Individuals were genotyped for 768 SNPs with a custom Illumina Golden Gate Assay, and peripheral blood mononuclear cells (PBMCs) of the same subjects were tested for a NER comet assay to measure DRC after challenging cells by benzo(a)pyrene diolepoxide (BPDE). We observed a large inter-individual variability of NER capacity, with women showing a statistically significant lower DRC (mean ± SD: 6.68 ± 4.76; p = 0.004) than men (mean ± SD: 8.89 ± 5.20). Moreover, DRC was significantly lower in individuals carrying a variant allele for the ERCC4 rs1800124 non-synonymous SNP (nsSNP) (p = 0.006) and significantly higher in subjects with the variant allele of MBD4 rs2005618 SNP (p = 0.008), in linkage disequilibrium (r(2) = 0.908) with rs10342 nsSNP. Traditional in silico docking approaches on protein-DNA and protein-protein interaction showed that Gly875 variant in ERCC4 (rs1800124) decreases the DNA-protein interaction and that Ser273 and Thr273 variants in MBD4 (rs10342) indicate complete loss of protein-DNA interactions. Our results showed that NER inter-individual capacity can be modulated by cross-talk activity involving nsSNPs in ERCC4 and MBD4 genes, and they suggested to better investigate SNP effect on cancer risk and response to chemo- and radiotherapies.
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Corral R, Lewinger JP, Joshi AD, Levine AJ, Vandenberg DJ, Haile RW, Stern MC. Genetic variation in the base excision repair pathway, environmental risk factors, and colorectal adenoma risk. PLoS One 2013; 8:e71211. [PMID: 23951112 PMCID: PMC3741365 DOI: 10.1371/journal.pone.0071211] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 06/27/2013] [Indexed: 12/12/2022] Open
Abstract
Cigarette smoking, high alcohol intake, and low dietary folate levels are risk factors for colorectal adenomas. Oxidative damage caused by these three factors can be repaired through the base excision repair pathway (BER). We hypothesized that genetic variation in BER might modify colorectal adenoma risk. In a sigmoidoscopy-based study, we examined associations between 182 haplotype tagging SNPs in 14 BER genes, and colorectal adenoma risk, and examined their potential role as modifiers of the effect cigarette smoking, alcohol intake, and dietary folate levels. Among all individuals, no statistically significant associations between BER SNPs and adenoma risk persisted after correction for multiple comparisons. However, among Asian-Pacific Islanders we observed two SNPs in FEN1 and one in NTHL1, and among African-Americans one SNP in APEX1 that were associated with colorectal adenoma risk. Significant associations were also observed between SNPs in the NEIL2 gene and rectal adenoma risk. Three SNPS modified the effect of smoking (MUTYH interaction p = 0.002; OGG1 interaction p = 0.013); FEN1 interaction p = 0.013)), one SNP in LIG3 modified the effect of alcohol consumption (interaction p = 0.024) and two SNPs in LIG3 modified the effect of dietary folate (interaction p = 0.001 and p = 0.08) on colorectal adenoma risk. These findings support a role for genetic variants in the BER pathway as potential modifiers of colorectal adenoma risk. Our findings strengthen the role of oxidative damage induced by key lifestyle and dietary risk factors in colorectal adenoma formation.
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Affiliation(s)
- Roman Corral
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
| | - Juan Pablo Lewinger
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
| | - Amit D. Joshi
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - A. Joan Levine
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- Division of Oncology, Department of Medicine, Stanford School of Medicine, Stanford, California, United States of America
| | - David J. Vandenberg
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
| | - Robert W. Haile
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- Division of Oncology, Department of Medicine, Stanford School of Medicine, Stanford, California, United States of America
| | - Mariana C. Stern
- Department of Preventive Medicine, Keck School of Medicine of USC, Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, California, United States of America
- * E-mail:
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20
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Xue X, Yin Z, Lu Y, Zhang H, Yan Y, Zhao Y, Li X, Cui Z, Yu M, Yao L, Zhou B. The joint effect of hOGG1, APE1, and ADPRT polymorphisms and cooking oil fumes on the risk of lung adenocarcinoma in Chinese non-smoking females. PLoS One 2013; 8:e71157. [PMID: 23951099 PMCID: PMC3741325 DOI: 10.1371/journal.pone.0071157] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Accepted: 06/26/2013] [Indexed: 11/18/2022] Open
Abstract
Background The human 8-oxoguanine DNA glycosylase 1 (hOGG1), apurinic/apyrimidinic endonuclease 1 (APE1), and adenosine diphosphate ribosyl transferase (ADPRT) genes play an important role in the DNA base excision repair pathway. Single nucleotide polymorphisms (SNPs) in critical genes are suspected to be associated with the risk of lung cancer. This study aimed to identify the association between the polymorphisms of hOGG1 Ser326Cys, APE1 Asp148Glu, and ADPRT Val762Ala, and the risk of lung adenocarcinoma in the non-smoking female population, and investigated the interaction between genetic polymorphisms and environmental exposure in lung adenocarcinoma. Methods We performed a hospital-based case-control study, including 410 lung adenocarcinoma patients and 410 cancer-free hospital control subjects who were matched for age. Each case and control was interviewed to collect information by well-trained interviewers. A total of 10 ml of venous blood was collected for genotype testing. Three polymorphisms were analyzed by the polymerase chain reaction-restriction fragment length polymorphism technique. Results We found that individuals who were homozygous for the variant hOGG1 326Cys/Cys showed a significantly increased risk of lung adenocarcinoma (OR = 1.54; 95% CI: 1.01–2.36; P = 0.045). When the combined effect of variant alleles was analyzed, we found an increased OR of 1.89 (95% CI: 1.24–2.88, P = 0.003) for lung adenocarcinoma individuals with more than one homozygous variant allele. In stratified analyses, we found that the OR for the gene-environment interaction between Ser/Cys and Cys/Cys genotypes of hOGG1 codon 326 and cooking oil fumes for the risk of lung adenocarcinoma was 1.37 (95% CI: 0.77–2.44; P = 0.279) and 2.79 (95% CI: 1.50–5.18; P = 0.001), respectively. Conclusions The hOGG1 Ser326Cys polymorphism might be associated with the risk of lung adenocarcinoma in Chinese non-smoking females. Furthermore, there is a significant gene-environment association between cooking oil fumes and hOGG1 326 Cys/Cys genotype in lung adenocarcinoma among female non-smokers.
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Affiliation(s)
- Xiaoxia Xue
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, PR China
| | - Zhihua Yin
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, PR China
| | - Yao Lu
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, PR China
| | - Haibo Zhang
- Department of Radiotherapy, Shenyang Northern Hospital, Shenyang, PR China
| | - Ying Yan
- Department of Radiotherapy, Shenyang Northern Hospital, Shenyang, PR China
| | - Yuxia Zhao
- Department of Radiation Oncology, First Affiliated Hospital of China Medical University, Shenyang, PR China
| | - Xuelian Li
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, PR China
| | - Zeshi Cui
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, PR China
| | - Miao Yu
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, PR China
| | - Lu Yao
- The Third Center of Laboratory Technology and Experimental Medicine, China Medical University, Shenyang, PR China
| | - Baosen Zhou
- Department of Epidemiology, School of Public Health, China Medical University, Shenyang, PR China
- * E-mail:
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21
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Przybylowska K, Kabzinski J, Sygut A, Dziki L, Dziki A, Majsterek I. An association selected polymorphisms of XRCC1, OGG1 and MUTYH gene and the level of efficiency oxidative DNA damage repair with a risk of colorectal cancer. Mutat Res 2013; 745-746:6-15. [PMID: 23618615 DOI: 10.1016/j.mrfmmm.2013.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 03/25/2013] [Accepted: 04/09/2013] [Indexed: 06/02/2023]
Abstract
Oxidative damage has been implicated in the pathogenesis of colorectal cancer (CRC). The base excision repair (BER) pathway is the major DNA repair pathway for oxidative DNA damage and genetic variation associated with impaired BER might thus increase a risk of CRC. In this work, we evaluated associations between the repair efficiency of oxidative DNA lesions and single-nucleotide polymorphisms of BER genes: the 194Trp/Arg and the 399Arg/Gln XRCC1, the 326Ser/Cys OGG1 and the 324Gln/His MUTYH and CRC occurrence in a Polish population. These polymorphisms were genotyped in 182 CRC patients and 245 control subjects, using a PCR-RFLP approach. The level of oxidative damage and DNA repair capacity in lymphocytes and CRC tissue samples was evaluated by comet assay using FPG and Nth glycosidases. The 326Ser/Cys OGG1 and the 324Gln/His as well as the 324His/His MUTYH genotypes were found to be associated with an increased CRC risk, while no association was found for the XRCC1 gene polymorphisms. It was also demonstrated the reduced capacity of oxidative damage repair in CRC patients in comparison to healthy controls. Moreover, the decrease efficiency of DNA repair were correlated with the 399Gln/Gln XRCC1 and the 324His/His MUTYH genotypes occurrence in CRC patients. The results obtained in our study indicated an association of OGG1 and MUTYH genes polymorphisms involved in oxidative DNA lesions repair with the risk occurrence of colorectal cancer in Polish patients. It was also found that studied polymorphisms might affect DNA repair capacity suggesting their role in CRC pathogenesis. Finally, we conclude that BER pathway may be an important target for the diagnosis and treatment of colorectal patients.
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Affiliation(s)
- Karolina Przybylowska
- Department of Clinical Chemistry and Biochemistry, Medical University of Lodz, Poland
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Cao L, Li T, Zhu Y, Zhou W, Guo W, Cai Z, Xie Y, He X, Li X, Zhu D, Wang Y. Detection of mosaicism for the polymorphic variants in the 5'-UTR of hOGG1 by cloning and sequence analysis and pyrosequencing. Electrophoresis 2013; 34:1163-70. [PMID: 23400936 DOI: 10.1002/elps.201200562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 12/12/2012] [Accepted: 12/17/2012] [Indexed: 11/11/2022]
Abstract
Mosaicism refers to the presence of genetically distinct cell lines within an organism or a tissue. Somatic mosaicism exists in distinct populations of somatic cells and commonly arises as a result of somatic mutations, mainly in early embryonic development. SNPs are important markers that distinguish between different individuals in heterogeneous biological samples and contribute greatly to disease risk association studies. In this work, we investigated the relationship between the functional variants in the 5'-UTR of the hOGG1 gene and the risk of type 2 diabetes. Upon detection of the polymorphisms c.-53G>C, c.-23A>G, and c.-18G>T in the hOGG1 gene, we found that mosaicism was present in 3/28 (10.71%), 7/51 (13.73%), and 1/44 (2.27%) patients respectively, who were carriers of these single nucleotide variations, by cloning and sequence analysis and pyrosequencing. Statistical analysis showed that the frequency of the variation c.-23A>G in the hOGG1 5'-UTR in type 2 diabetic patients was significantly higher than that in healthy controls. However, sequencing of the mutant alleles in mosaic individuals showed weak peaks that may affect detection of the SNPs and impair association-based investigations.
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Affiliation(s)
- Lili Cao
- Department of Medical Genetics, Nanjing University School of Medicine, Nanjing, Jiangsu, PR China
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Chronic inflammation as a promotor of mutagenesis in essential thrombocythemia, polycythemia vera and myelofibrosis. A human inflammation model for cancer development? Leuk Res 2012; 37:214-20. [PMID: 23174192 DOI: 10.1016/j.leukres.2012.10.020] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2012] [Revised: 08/11/2012] [Accepted: 10/24/2012] [Indexed: 12/27/2022]
Abstract
The Philadelphia-negative chronic myeloproliferative neoplasms (MPNs) are acquired stem cell neoplasms, in which a stem cell lesion induces an autonomous proliferative advantage. In addition to the JAK2V617 mutation several other mutations have been described. Recently chronic inflammation has been proposed as a trigger and driver of clonal evolution in MPNs. Herein, it is hypothesized that sustained inflammation may elicit the stem cell insult by inducing a state of chronic oxidative stress with elevated levels of reactive oxygen species (ROS) in the bone marrow, thereby creating a high-risk microenvironment for induction of mutations due to the persistent inflammation-induced oxidative damage to DNA in hematopoietic cells. Alterations in the epigenome induced by the chronic inflammatory drive may likely elicit a "epigenetic switch" promoting persistent inflammation. The perspectives of chronic inflammation as the driver of mutagenesis in MPNs are discussed, including early intervention with interferon-alpha2 and potent anti-inflammatory agents (e.g. JAK1-2 inhibitors, histone deacetylase inhibitors, DNA-hypomethylators and statins) to disrupt the self-perpetuating chronic inflammation state and accordingly eliminating a potential trigger of clonal evolution and disease progression with myelofibrotic and leukemic transformation.
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