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Hardin LT, Abid N, Vang D, Han X, Thor D, Ojcius DM, Xiao N. miRNAs mediate the impact of smoking on dental pulp stem cells via the p53 pathway. Toxicol Sci 2024; 200:47-56. [PMID: 38636493 DOI: 10.1093/toxsci/kfae042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024] Open
Abstract
Cigarette smoke changes the genomic and epigenomic imprint of cells. In this study, we investigated the biological consequences of extended cigarette smoke exposure on dental pulp stem cells (DPSCs) and the potential roles of miRNAs. DPSCs were treated with various doses of cigarette smoke condensate (CSC) for up to 6 weeks. Cell proliferation, survival, migration, and differentiation were evaluated. Cytokine and miRNA expression were profiled. The results showed that extended exposure to CSC significantly impaired the regenerative capacity of the DPSCs. Bioinformatic analysis showed that the cell cycle pathway, cancer pathways (small cell lung cancer, pancreatic, colorectal, and prostate cancer), and pathways for TNF, TGF-β, p53, PI3K-Akt, mTOR, and ErbB signal transduction, were associated with altered miRNA profiles. In particular, 3 miRNAs has-miR-26a-5p, has-miR-26b-5p, and has-miR-29b-3p fine-tune the p53 and cell cycle signaling pathways to regulate DPSC cellular activities. The work indicated that miRNAs are promising targets to modulate stem cell regeneration and understanding miRNA-targeted genes and their associated pathways in smoking individuals have significant implications for disease control and prevention.
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Affiliation(s)
- Leyla Tahrani Hardin
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
| | - Nabil Abid
- Department of Molecular and Cellular Biology, High Institute of Biotechnology of Monastir, University of Monastir, Monastir, 5000, Tunisia
- Laboratory of Transmissible Diseases and Biological Active Substances LR99ES27, Faculty of Pharmacy of Monastir, University of Monastir, Monastir, 5000, Tunisia
| | - David Vang
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
| | - Xiaoyuan Han
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
| | - Der Thor
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
| | - David M Ojcius
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
| | - Nan Xiao
- Department of Biomedical Sciences, Arthur A. Dugoni School of Dentistry, University of the Pacific, San Francisco, California 94103, USA
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Prime SS, Darski P, Hunter KD, Cirillo N, Parkinson EK. A Review of the Repair of DNA Double Strand Breaks in the Development of Oral Cancer. Int J Mol Sci 2024; 25:4092. [PMID: 38612901 PMCID: PMC11012950 DOI: 10.3390/ijms25074092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/29/2024] [Accepted: 04/01/2024] [Indexed: 04/14/2024] Open
Abstract
We explore the possibility that defects in genes associated with the response and repair of DNA double strand breaks predispose oral potentially malignant disorders (OPMD) to undergo malignant transformation to oral squamous cell carcinoma (OSCC). Defects in the homologous recombination/Fanconi anemia (HR/FA), but not in the non-homologous end joining, causes the DNA repair pathway to appear to be consistent with features of familial conditions that are predisposed to OSCC (FA, Bloom's syndrome, Ataxia Telangiectasia); this is true for OSCC that occurs in young patients, sometimes with little/no exposure to classical risk factors. Even in Dyskeratosis Congenita, a disorder of the telomerase complex that is also predisposed to OSCC, attempts at maintaining telomere length involve a pathway with shared HR genes. Defects in the HR/FA pathway therefore appear to be pivotal in conditions that are predisposed to OSCC. There is also some evidence that abnormalities in the HR/FA pathway are associated with malignant transformation of sporadic cases OPMD and OSCC. We provide data showing overexpression of HR/FA genes in a cell-cycle-dependent manner in a series of OPMD-derived immortal keratinocyte cell lines compared to their mortal counterparts. The observations in this study argue strongly for an important role of the HA/FA DNA repair pathway in the development of OSCC.
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Affiliation(s)
- Stephen S. Prime
- Centre for Immunology and Regenerative Medicine, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK;
| | - Piotr Darski
- Liverpool Head and Neck Centre, Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool L69 3BX, UK; (P.D.); (K.D.H.)
| | - Keith D. Hunter
- Liverpool Head and Neck Centre, Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool L69 3BX, UK; (P.D.); (K.D.H.)
| | - Nicola Cirillo
- Melbourne Dental School, University of Melbourne, 720 Swanson Street, Carlton, Melbourne, VIC 3053, Australia;
- School of Dentistry, University of Jordan, Amman 11942, Jordan
| | - E. Kenneth Parkinson
- Centre for Immunology and Regenerative Medicine, Institute of Dentistry, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK;
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Eguchi H, Yu Y, Matsunaga T, Yoshino Y, Ikari A. Acrolein suppresses anticancer drug-induced toxicity mediated by activating claudin-1 and Nrf2 axis in a spheroid model of human lung squamous cell carcinoma cells. Toxicol Lett 2024; 392:46-55. [PMID: 38142011 DOI: 10.1016/j.toxlet.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/07/2023] [Accepted: 12/20/2023] [Indexed: 12/25/2023]
Abstract
Tobacco smoke contains various carcinogenic ingredients such as nicotine, acrolein, and benzopyrene; however, their effects on cancer treatment are not fully understood. Claudin-1 (CLDN1), a component of tight junctions, is involved in the increased resistance to anticancer drugs. In this study, we found that acrolein increases the mRNA and protein levels of CLDN1 in RERF-LC-AI cells derived from human lung squamous cell carcinoma (SCC). Acrolein increased the p-extracellular signal-regulated kinase (ERK) 1/2 levels without affecting the p-Akt level. The acrolein-induced elevation of CLDN1 expression was attenuated by U0126, a mitogen-activated protein kinase kinas (MEK) inhibitor. These results indicate that the activation of MEK/ERK pathway is involved in the acrolein-induced elevation of CLDN1 expression. In a spheroid model, acrolein suppressed the accumulation and toxicity of doxorubicin (DXR), which were rescued by CLDN1 silencing. The acrolein-induced effects were also observed in lung SCC-derived EBC-1 and LK-2 cells. Acrolein also increased the expression level of nuclear factor erythroid 2-related factor 2 (Nrf2), a transcription factor that regulates antioxidant and detoxifying genes, which were inhibited by CLDN1 silencing. In spheroid cells, the levels of reactive oxygen species were enhanced by acrolein, which was inhibited by CLDN1 silencing. Taken together, acrolein may reduce the anticancer drug-induced toxicity in human lung SCC cells mediated by high CLDN1 expression followed by the upregulation of Nrf2 signaling pathway.
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Affiliation(s)
- Hiroaki Eguchi
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Yaqing Yu
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Toshiyuki Matsunaga
- Laboratory of Bioinformatics, Gifu Pharmaceutical University, Gifu 502-8585, Japan
| | - Yuta Yoshino
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan
| | - Akira Ikari
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan.
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4
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The Prognostic and Therapeutic Potential of DNA Damage Repair Pathway Alterations and Homologous Recombination Deficiency in Lung Cancer. Cancers (Basel) 2022; 14:cancers14215305. [DOI: 10.3390/cancers14215305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 10/19/2022] [Accepted: 10/26/2022] [Indexed: 12/24/2022] Open
Abstract
Lung cancer remains the second most commonly diagnosed cancer worldwide and the leading cause of cancer-related mortality. The mapping of genomic alterations and their role in lung-cancer progression has been followed by the development of new therapeutic options. Several novel drugs, such as targeted therapy and immunotherapy, have significantly improved outcomes. However, many patients with lung cancer do not benefit from existing therapies or develop progressive disease, leading to increased morbidity and mortality despite initial responses to treatment. Alterations in DNA-damage repair (DDR) genes represent a cancer hallmark that impairs a cell’s ability to prevent deleterious mutation accumulation and repair. These alterations have recently emerged as a therapeutic target in breast, ovarian, prostate, and pancreatic cancers. The role of DDR alterations remains largely unknown in lung cancer. Nevertheless, recent research efforts have highlighted a potential role of some DDR alterations as predictive biomarkers of response to treatment. Despite the failure of PARP inhibitors (main class of DDR targeting agents) to improve outcomes in lung cancer patients, there is some evidence suggesting a role of PARP inhibitors and other DDR targeting agents in benefiting a distinct subset of lung cancer patients. In this review, we will discuss the existing literature on DDR alterations and homologous recombination deficiency (HRD) state as predictive biomarkers and therapeutic targets in both non-small cell lung and small cell lung cancer.
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A Dietary Antioxidant Formulation Ameliorates DNA Damage Caused by γ-Irradiation in Normal Human Bronchial Epithelial Cells In Vitro. Antioxidants (Basel) 2022; 11:antiox11071407. [PMID: 35883898 PMCID: PMC9311589 DOI: 10.3390/antiox11071407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 12/10/2022] Open
Abstract
Antioxidants can be used as radioprotectants to reduce DNA damage due to exposure to radiation that could result in malignancies, including lung cancer. Mortality rates are consistently higher in lung cancer, which is usually diagnosed at later stages of cancer development and progression. In this preliminary study, we examined the potential of an antioxidant formulation (AOX2) to reduce DNA damage using a cell model of human normal bronchial epithelial cells (BEAS-2B). Cells were exposed to γ-irradiation or smoke-related hydrocarbon 4[(acetoxymethyl)nitrosamino]-1 (3-pyridyl) 1-butanone (NNKOAc) to induce DNA damage. We monitored intracellular reactive oxygen species (ROS) levels and evidence of genotoxic damage including DNA fragmentation ELISA, γ-H2AX immunofluorescence, and comet assays. Pre-incubation of the cells with AOX2 before exposure to γ-irradiation and NNKOAc significantly reduced DNA damage. The dietary antioxidant preparation AOX2 significantly reduced the induction of the tumor suppressor protein p53 and DNA damage-associated γ-H2AX phosphorylation by radiation and the NNKOAc treatment. Thus, AOX2 has the potential to act as a chemoprotectant by lowering ROS levels and DNA damage caused by exposure to radiation or chemical carcinogens.
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Li Y, Zou Z, Gao Z, Wang Y, Xiao M, Xu C, Jiang G, Wang H, Jin L, Wang J, Wang HZ, Guo S, Wu J. Prediction of lung cancer risk in Chinese population with genetic-environment factor using extreme gradient boosting. Cancer Med 2022; 11:4469-4478. [PMID: 35499292 PMCID: PMC9741969 DOI: 10.1002/cam4.4800] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 04/22/2022] [Accepted: 04/24/2022] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Detecting early-stage lung cancer is critical to reduce the lung cancer mortality rate; however, existing models based on germline variants perform poorly, and new models are needed. This study aimed to use extreme gradient boosting to develop a predictive model for the early diagnosis of lung cancer in a multicenter case-control study. MATERIALS AND METHODS A total of 974 cases and 1005 controls in Shanghai and Taizhou were recruited, and 61 single nucleotide polymorphisms (SNPs) were genotyped. Multivariate logistic regression was used to calculate the association between signal SNPs and lung cancer risk. Logistic regression (LR) and extreme gradient boosting (XGBoost) algorithms, a large-scale machine learning algorithm, were adopted to build the lung cancer risk model. In both models, 10-fold cross-validation was performed, and model predictive performance was evaluated by the area under the curve (AUC). RESULTS After FDR adjustment, TYMS rs3819102 and BAG6 rs1077393 were significantly associated with lung cancer risk (p < 0.05). For lung cancer risk prediction, the model predicted only with epidemiology attained an AUC of 0.703 for LR and 0.744 for XGBoost. Compared with the LR model predicted only with epidemiology, further adding SNPs and applying XGBoost increased the AUC to 0.759 (p < 0.001) in the XGBoost model. BAG6 rs1077393 was the most important predictor among all SNPs in the lung cancer prediction XGBoost model, followed by TERT rs2735845 and CAMKK1 rs7214723. Further stratification in lung adenocarcinoma (ADC) showed a significantly elevated performance from 0.639 to 0.699 (p = 0.009) when applying XGBoost and adding SNPs to the model, while the best model for lung squamous cell carcinoma (SCC) prediction was the LR model predicted with epidemiology and SNPs (AUC = 0.833), compared with the XGBoost model (AUC = 0.816). CONCLUSION Our lung cancer risk prediction models in the Chinese population have a strong predictive ability, especially for SCC. Adding SNPs and applying the XGBoost algorithm to the epidemiologic-based logistic regression risk prediction model significantly improves model performance.
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Affiliation(s)
- Yutao Li
- School of Life SciencesFudan UniversityShanghaiChina
| | - Zixiu Zou
- School of Life SciencesFudan UniversityShanghaiChina
| | - Zhunyi Gao
- Company 6 of Basic Medical SchoolNavy Military Medical UniversityShanghaiChina
| | - Yi Wang
- School of Life SciencesFudan UniversityShanghaiChina
| | - Man Xiao
- Department of Biochemistry and Molecular BiologyHainan Medical UniversityHaikouChina
| | - Chang Xu
- Clinical College of Xiangnan UniversityChenzhouChina
| | - Gengxi Jiang
- Department of Thoracic Surgerythe First Affiliated Hospital of Naval Medical University (Second Military Medical University)ShanghaiChina
| | - Haijian Wang
- School of Life SciencesFudan UniversityShanghaiChina
| | - Li Jin
- School of Life SciencesFudan UniversityShanghaiChina
| | - Jiucun Wang
- School of Life SciencesFudan UniversityShanghaiChina
| | - Huai Zhou Wang
- Department of Laboratory Diagnosisthe First Affiliated Hospital of Naval Medical University (Second Military Medical University)ShanghaiChina
| | - Shicheng Guo
- School of Life SciencesFudan UniversityShanghaiChina
| | - Junjie Wu
- School of Life SciencesFudan UniversityShanghaiChina,Department of Pulmonary and Critical Care Medicine, Zhongshan HospitalFudan UniversityShanghaiChina,Department of Pulmonary and Critical Care MedicineShanghai Geriatric Medical CenterShanghaiChina
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7
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Liu Y, Hua Q, Li M, Li X, Chen W, Zeng H, Diao Q, Shi C, Ling Y, Jiang Y. Circular RNA circNIPBL promotes NNK-induced DNA damage in bronchial epithelial cells via the base excision repair pathway. Arch Toxicol 2022; 96:2049-2065. [PMID: 35435490 DOI: 10.1007/s00204-022-03297-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 03/31/2022] [Indexed: 01/18/2023]
Abstract
Environmental chemical exposure often causes DNA damage, which leads to cellular dysfunction and the development of diseases. 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific carcinogen that is known to cause DNA damage, while remains unknown about the underlying mechanism. In this study, simulated doses of NNK exposure in smokers, ranging from 50 to 300 μM, were used to detect the DNA damage effects of NNK in two human bronchial epithelial cells, 16HBE and BEAS-2B. The comet assay revealed increased DNA damage in response to NNK treatment, as measured by increased Olive tail moment (OTM). NNK treatment also led to elevated foci formation and protein expression of γ-H2AX, a DNA damage sensor. Dysregulation of proliferation, cell cycle arrest and apoptosis, was also observed in NNK-treated cells. Furthermore, the most effective dose of NNK (300 μM) was used in subsequent mechanistic studies. A circular RNA circNIPBL was identified to be significantly up-regulated in NNK-treated cells, circNIPBL knockdown successfully alleviated NNK-induced DNA damage and reversed the cellular dysregulation, while circNIPBL overexpression had the opposite effect. Mechanistically, we identified an interaction between circNIPBL and PARP1, a critical enzyme of the base excision repair (BER) pathway. CircNIPBL silencing successfully alleviated the NNK-induced inhibition of BER pathway proteins, including PARP1, XRCC1, PCNA and FEN1, while overexpression of circNIPBL had the opposite effect. In summary, our study shows for the first time that circNIPBL promotes NNK-induced DNA damage and cellular dysfunction through the BER pathway. In addition, our findings reveal the crucial role of epigenetic regulation in carcinogen-induced genetic lesions and further our understanding of environmental carcinogenesis.
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Affiliation(s)
- Yufei Liu
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Qiuhan Hua
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Meizhen Li
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Xueqi Li
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Wei Chen
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Huixian Zeng
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Qinqin Diao
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Changhong Shi
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Yihui Ling
- Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China
| | - Yiguo Jiang
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China. .,Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao Town, Panyu District, Guangzhou, 511436, China.
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8
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van Os S, Syversen A, Whitaker KL, Quaife SL, Janes SM, Jallow M, Black G. Lung cancer symptom appraisal, help-seeking and diagnosis - rapid systematic review of differences between patients with and without a smoking history. Psychooncology 2022; 31:562-576. [PMID: 34766413 DOI: 10.1002/pon.5846] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/09/2021] [Accepted: 10/24/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Lung cancer is the leading cause of cancer death in the world. A significant minority of lung cancer patients have never smoked (14% in the UK, and ranging from 10% to 25% worldwide). Current evidence suggests that never-smokers encounter delays during the diagnostic pathway, yet it is unclear how their experiences and reasons for delayed diagnoses differ from those of current and former smokers. This rapid review assessed literature about patient experiences in relation to symptom awareness and appraisal, help-seeking, and the lung cancer diagnostic pathway, comparing patients with and without a smoking history. METHODS MEDLINE, PsychINFO and Google Scholar were searched for studies (2010-2020) that investigated experiences of the pathway to diagnosis for patients with and without a smoking history. Findings are presented using a narrative synthesis. RESULTS Analysis of seven quantitative and three qualitative studies revealed that some delays during symptom appraisal and diagnosis are unique to never-smokers. Due to the strong link between smoking and lung cancer, and low awareness of non-smoking related lung cancer risk factors and symptoms, never-smokers do not perceive themselves to be at risk. Never-smokers are also likely to evaluate their experiences in comparison with other non-smoking related cancers, where prognosis is likely better, potentially leading to lower satisfaction with healthcare. CONCLUSION Never-smokers appear to have different experiences in relation to symptom appraisal and diagnosis. However, evidence in relation to help-seeking, and what is driving diagnostic delays for never-smoker patients specifically is lacking.
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Affiliation(s)
- Sandra van Os
- Department of Applied Health Research, University College London, London, UK
| | - Aron Syversen
- Institute of Epidemiology and Healthcare, University College London, London, UK
| | | | - Samantha L Quaife
- Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Sam M Janes
- Lungs for Living Research Centre, UCL Respiratory, Division of Medicine, University College London, London, UK
| | - Mbasan Jallow
- Research Department of Behavioural Science and Health, University College London, London, UK
| | - Georgia Black
- Department of Applied Health Research, University College London, London, UK
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Sustained Functioning Impairments and Oxidative Stress with Neurobehavioral Dysfunction Associated with Oral Nicotine Exposure in the Brain of a Murine Model of Ehrlich Ascites Carcinoma: Modifying the Antioxidant Role of Chlorella vulgaris. BIOLOGY 2022; 11:biology11020279. [PMID: 35205143 PMCID: PMC8869302 DOI: 10.3390/biology11020279] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/28/2022] [Accepted: 02/04/2022] [Indexed: 12/20/2022]
Abstract
Simple Summary Nicotine is the major psychoactive component considered to underlie tobacco’s addictive nature, and its dependence has been linked to several drawbacks on behavior and brain health. The purpose of this study was to investigate the mechanisms triggered by oral nicotine that cause brain tissue damage, as well as the supportive role of Chlorella vulgaris microalgae supplementation in Ehrlich ascites carcinoma in mice. The results revealed pronounced neurobehavioral alterations, increased mortality rate, oxidative stress, DNA damage, and augmented inflammatory response in the brain tissue alongside the microstructural alteration caused by nicotine. Chlorella vulgaris was quite successful in reducing the negative effects of nicotine. It acts as an antioxidant anti-inflammatory and restores nearly normal tissue architectures. As a result, we believe it should be supplemented to cancer patients consuming regular nicotine doses. Abstract Background: This study provides a model for studying the mechanism(s) responsible for the nervous tissue damage and misfunctioning that occurred due to oral nicotine exposure, considered a stress factor, during the presence of Ehrlich ascites carcinoma bearing in the mouse model (EAC). The mitigating role of Chlorella vulgaris (CV) against nicotine-induced brain damage was evaluated. Methods: Eighty Swiss female mice were classified into four groups, these were the control, the CV group, the nicotine group(100 µg/kg), and the combination group. Oxidant/antioxidant status, proinflammatory cytokines levels, DNA damage, quantitative microscopical lesions, and Caspase 3, Bcl-2 proteins were assessed in the current study. Levels of dopamine (DA) and gamma-aminobutyric acid (GABA) were also evaluated. Results: Nicotine was found to cause pronounced neurobehavioral alterations, increase the mortalities oxidative stress DNA damage, and augment the inflammatory response in brain tissue alongside the microstructural alteration. The administration of CV with nicotine in EAC-bearing mice rescued the detrimental effects of nicotine. Conclusions: CV aids in reducing the harmful effects of nicotine and returns the conditions caused by nicotine to near-control levels. Thus, we are in favor of giving it to cancer patients who are taking daily dosages of nicotine even by smoking cigarettes or being exposed to second-hand smoke.
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10
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Yuwono NL, Warton K, Ford CE. The influence of biological and lifestyle factors on circulating cell-free DNA in blood plasma. eLife 2021; 10:e69679. [PMID: 34752217 PMCID: PMC8577835 DOI: 10.7554/elife.69679] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 10/23/2021] [Indexed: 01/02/2023] Open
Abstract
Research and clinical use of circulating cell-free DNA (cirDNA) is expanding rapidly; however, there remain large gaps in our understanding of the influence of lifestyle and biological factors on the amount of cirDNA present in blood. Here, we review 66 individual studies of cirDNA levels and lifestyle and biological factors, including exercise (acute and chronic), alcohol consumption, occupational hazard exposure, smoking, body mass index, menstruation, hypertension, circadian rhythm, stress, biological sex and age. Despite technical and methodological inconsistences across studies, we identify acute exercise as a significant influence on cirDNA levels. Given the large increase in cirDNA induced by acute exercise, we recommend that controlling for physical activity prior to blood collection is routinely incorporated into study design when total cirDNA levels are of interest. We also highlight appropriate selection and complete reporting of laboratory protocols as important for improving the reproducibility cirDNA studies and ability to critically evaluate the results.
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Affiliation(s)
- Nicole Laurencia Yuwono
- Gynaecological Cancer Research Group, Adult Cancer Program, Lowy Cancer Research Centre, Department of Obstetrics & Gynaecology, School of Women's and Children's Health, Faculty of Medicine & Health, University of New South WalesSydneyAustralia
| | - Kristina Warton
- Gynaecological Cancer Research Group, Adult Cancer Program, Lowy Cancer Research Centre, Department of Obstetrics & Gynaecology, School of Women's and Children's Health, Faculty of Medicine & Health, University of New South WalesSydneyAustralia
| | - Caroline Elizabeth Ford
- Gynaecological Cancer Research Group, Adult Cancer Program, Lowy Cancer Research Centre, Department of Obstetrics & Gynaecology, School of Women's and Children's Health, Faculty of Medicine & Health, University of New South WalesSydneyAustralia
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11
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Yang JL, Yang MD, Chen JC, Lu KW, Huang YP, Peng SF, Chueh FS, Liu KC, Lin TS, Chen PY, Chen WJ. Ouabain Induces DNA Damage in Human Osteosarcoma U-2 OS Cells and Alters the Expression of DNA Damage and DNA Repair-associated Proteins. In Vivo 2021; 35:2687-2696. [PMID: 34410957 DOI: 10.21873/invivo.12552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/14/2021] [Accepted: 07/15/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Ouabain, isolated from natural plants, exhibits anticancer activities; however, no report has presented its mechanism of DNA damage induction in human osteosarcoma cancer cells in vitro. The aim of this study was to investigate whether ouabain induces DNA damage and repair, accompanied with molecular pathways in human osteosarcoma cancer U-2 OS cells in vitro. MATERIALS AND METHODS The percentage of viable cell number was measured by flow cytometric assay; DNA damage was assayed by DAPI staining, comet assay, and agarose gel electrophoresis. DNA damage and repair associated protein expressions were assayed by western blotting assays. RESULTS Ouabain reduced total cell viability, induced chromatin condensation, DNA fragmentation, and DNA damage in U-2 OS cells. Ouabain increased p-ATMSer1981, p-ATRSer428, and p53 at 2.5-10 μM, increased p-p53Ser15 at 10 μM; however, it decreased p-MDM2Ser166 at 2.5-10 μM. Ouabain increased p-H2A.XSer139, MDC-1, and PARP at 2.5-10 μM and BRCA1 at 5-10 μM; however, it decreased DNA-PK and MGMT at 2.5-10 μM in U-2 OS cells at 48 h treatment. Ouabain promoted expression and nuclear translocation of p-H2A.XSer139 in U-2 OS cells and this was confirmed by confocal laser microscopy. CONCLUSION Ouabain reduced total viable cell number through triggering DNA damage and altering the protein expression of DNA damage and repair system in U-2 OS cells in vitro.
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Affiliation(s)
- Jiun-Long Yang
- Department of Nursing, Saint Mary's Junior College of Medicine, Nursing and Management, Yilan, Taiwan, R.O.C
| | - Mei-Due Yang
- Department of Surgery, China Medical University Hospital, Taichung, Taiwan, R.O.C
| | - Jaw-Chyun Chen
- Department of Medicinal Botany and Health Applications, Da-Yeh University, Changhua, Taiwan, R.O.C
| | - Kung-Wen Lu
- College of Chinese Medicine, School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Yi-Ping Huang
- Department of Physiology, School of Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Shu-Fen Peng
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, R.O.C.,Department of Medical Research, China Medical University Hospital, Taichung, Taiwan, R.O.C
| | - Fu-Shin Chueh
- Department of Food Nutrition and Health Biotechnology, Asia University, Taichung, Taiwan, R.O.C
| | - Kuo-Ching Liu
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan, R.O.C
| | - Tzu-Shun Lin
- Department of Nursing, Saint Mary's Junior College of Medicine, Nursing and Management, Yilan, Taiwan, R.O.C.,Department of Pharmacy, Saint Mary's Hospital Luodong, Yilan, Taiwan, R.O.C
| | - Po-Yuan Chen
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan, R.O.C.;
| | - Wei-Jen Chen
- Department of Orthopedics, Chang Bing Show-Chwan Memorial Hospital, Changhua, Taiwan, R.O.C.; .,Department of Orthopedics, Show-Chwan Memorial Hospital, Changhua, Taiwan, R.O.C
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12
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Single-Cell and Population Transcriptomics Reveal Pan-epithelial Remodeling in Type 2-High Asthma. Cell Rep 2021; 32:107872. [PMID: 32640237 PMCID: PMC8046336 DOI: 10.1016/j.celrep.2020.107872] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 05/14/2020] [Accepted: 06/15/2020] [Indexed: 12/15/2022] Open
Abstract
The type 2 cytokine-high asthma endotype (T2H) is characterized by IL-13-driven mucus obstruction of the airways. To further investigate this incompletely understood pathobiology, we characterize IL-13 effects on human airway epithelial cell cultures using single-cell RNA sequencing, finding that IL-13 generates a distinctive transcriptional state for each cell type. Specifically, we discover a mucus secretory program induced by IL-13 in all cell types which converts both mucus and defense secretory cells into a metaplastic state with emergent mucin production and secretion, while leading to ER stress and cell death in ciliated cells. The IL-13-remodeled epithelium secretes a pathologic, mucin-imbalanced, and innate immunity-depleted proteome that arrests mucociliary motion. Signatures of IL-13-induced cellular remodeling are mirrored by transcriptional signatures characteristic of the nasal airway epithelium within T2H versus T2-low asthmatic children. Our results reveal the epithelium-wide scope of T2H asthma and present candidate therapeutic targets for restoring normal epithelial function. Using airway epithelial cell cultures, Jackson et al. show that IL-13, a driver of type 2-high asthma, induces emergent mucus secretory expression states for each cell type. This program universally diminishes innate airway defense, produces a pathologic mucus secretome that arrests mucociliary movement, and is recapitulated in type 2 inflamed children.
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13
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Wang H, Chen H, Huang L, Li X, Wang L, Li S, Liu M, Zhang M, Han S, Jiang X, Fu Y, Tian Y, Hou H, Hu Q. In vitro toxicological evaluation of a tobacco heating product THP COO and 3R4F research reference cigarette on human lung cancer cells. Toxicol In Vitro 2021; 74:105173. [PMID: 33848590 DOI: 10.1016/j.tiv.2021.105173] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/28/2021] [Accepted: 04/09/2021] [Indexed: 12/01/2022]
Abstract
Cigarette smoking increases health risks, such as respiratory diseases and heart diseases. Despite the decline in smoking rates in some countries, millions of adults still choose to smoke cigarettes. The use of next-generation nicotine delivery devices, such as tobacco heating products (THPs), may become a potentially safer alternative to smoking. Here, we report on the development of an electrically heated THP, coded as THP COO, with three different flavored tobacco sticks. The purpose of the study was to measure the levels of a list of harmful and potentially harmful constituents (HPHCs) in the total particulate matter (TPM) generated and to conduct a set of toxicological assessments of THP COO as compared with 3R4F reference cigarette. For all 55 HPHCs identified, the levels generated by the THP tobacco sticks were significantly lower in comparison to those in 3R4F TPM. The rate of reduction of HPHCs was between 68.6% and 99.9% under Health Canada Intense (HCI) smoking regimen. Human lung cancer cells (NCI-H292) exposed to 3R4F TPM showed dose-dependent responses for most of the 15 in vitro toxicity endpoints, whereas those exposed to comparable doses of THP COO TPMs did not. Therefore, exclusive use of the THP COO products may reduce the exposure of those tested HPHCs and thus potentially reduce health risk of smoking.
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Affiliation(s)
- Hongjuan Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Huan Chen
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Long Huang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Xiangyu Li
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Lulu Wang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Shigang Li
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Min Liu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Manying Zhang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Shulei Han
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Xingyi Jiang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Yaning Fu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Yushan Tian
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China
| | - Hongwei Hou
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China.
| | - Qingyuan Hu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou, China.
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14
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Podralska M, Dzikiewicz-Krawczyk A, Mosor M, Żurawek M, Iżykowska K, Słomski R, Rydzanicz M, Gabryel P, Dyszkiewicz W, Ziółkowska-Suchanek I. The most frequent Polish ATM mutations are not susceptibility factors for tobacco-related cancers. Arch Med Sci 2021; 17:1158-1163. [PMID: 34522244 PMCID: PMC8425226 DOI: 10.5114/aoms.2020.94155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 10/10/2018] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION The inactivation of both alleles of the ATM gene leads to ataxia-telangiectasia syndrome, whereas carriers of monoallelic mutations in the ATM gene are associated with increased risk of different types of cancer. Three substitutions in the ATM gene (c.6095G>A, c.7630-2A>C, c.5932G>T) are the most common mutations causing ataxia-telangiectasia among Polish patients. The aim of this study was to determine whether these ATM mutations are associated with increased risk of tobacco-related cancers. MATERIAL AND METHODS 783 Polish patients with tobacco-related cancers were included in the study (468 with lung cancer, 153 with a single laryngeal cancer, 86 with multiple primary tumors localized in the larynx and 76 multiple primary tumors localized in the head or neck). The control group consisted of 464 healthy subjects from the Polish population. Three ATM mutations - c.5932G>T, c.6095G>A, c.7630-2A>C - were tested among selected patients. Molecular analyses were performed using high resolution melting analysis and restriction fragment length polymorphism. RESULTS In the present study, we detected only one mutation, c.7630-2A>C, and no carriers of c.5932G>T, c.6095G>A mutations in the ATM gene among Polish patients with tobacco-related cancers. A patient with c.7630-2A>C mutation was diagnosed with lung adenocarcinoma, the most common type of lung cancer. One carrier of c.6095G>A mutation was found in the control group. CONCLUSIONS The results indicate that the studied ATM variants do not seem to be associated with tobacco-related cancers in Poland.
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Affiliation(s)
- Marta Podralska
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | - Maria Mosor
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | - Magdalena Żurawek
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | - Ryszard Słomski
- Institute of Human Genetics, Polish Academy of Sciences, Poznan, Poland
| | | | - Piotr Gabryel
- Department of Thoracic Surgery, Poznan University of Medical Sciences, Poznan, Poland
| | - Wojciech Dyszkiewicz
- Department of Thoracic Surgery, Poznan University of Medical Sciences, Poznan, Poland
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15
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Amararathna M, Hoskin DW, Rupasinghe HPV. Anthocyanin-rich haskap (Lonicera caerulea L.) berry extracts reduce nitrosamine-induced DNA damage in human normal lung epithelial cells in vitro. Food Chem Toxicol 2020; 141:111404. [PMID: 32413456 DOI: 10.1016/j.fct.2020.111404] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/29/2020] [Accepted: 05/01/2020] [Indexed: 12/14/2022]
Abstract
Diets rich in polyphenols are known to reduce cancer among high-risk populations. Haskap (Lonicera caerulea L.) berry has abundant phenolic acids and flavonoids, especially anthocyanins. Tobacco-specific nitrosamine, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) present in cigarette smoke, is a major lung carcinogenic factor. We analyzed the efficacy of anthocyanin-rich haskap berry extracts in preventing DNA damage induced by 4-[(acetoxymethyl) nitrosamino]-1-(3-pyridyl)-1-butanone (NNKOAc), a precursor of NKK, in human lung epithelial BEAS-2B cells in vitro. A cocktail of monomeric polyphenols from haskap berries was extracted separately in ethanol and water and profiled. Sub-lethal concentrations of NNKOAc were used to induce DNA damage in BEAS-2B cells, and a cell viability assay was performed to confirm that the tested concentrations of haskap extracts were not cytotoxic to BEAS-2B cells. Cells were pre-treated with the haskap extracts prior to NNKOAc exposure. Dose-dependent DNA damage was observed with carcinogenic NNKOAc, but did not occur in the presence of the haskap extracts. Pre-treatment of the cells with the haskap extracts significantly reduced NNKOAc-induced DNA damage, DNA fragmentation, and intracellular reactive oxygen species and upregulated the ATM-dependent DNA damage repair cascade compared to non-treated BEAS-2B cells. The protective effect of haskap extracts could be related to their polyphenol content and high antioxidant capacity.
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Affiliation(s)
- M Amararathna
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada
| | - D W Hoskin
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - H P Vasantha Rupasinghe
- Department of Plant, Food, and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS, Canada; Department of Pathology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada.
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16
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Khalil C, Chahine JB, Chahla B, Hobeika T, Khnayzer RS. Characterization and cytotoxicity assessment of nargile smoke using dynamic exposure. Inhal Toxicol 2019; 31:343-356. [DOI: 10.1080/08958378.2019.1683104] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Christian Khalil
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
- Institute of Environmental Studies, University of New South Wales (UNSW), Sydney, Australia
| | - Joe Braham Chahine
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
| | - Brenda Chahla
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
| | - Tamara Hobeika
- Department of Natural Sciences, School of Arts and Sciences, Lebanese American University, Byblos, Lebanon
| | - Rony S. Khnayzer
- Department of Natural Sciences, Lebanese American University, Chouran, Beirut, Lebanon
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17
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Loss of CHEK2 Predicts Progression in Stage pT1 Non-Muscle-Invasive Bladder Cancer (NMIBC). Pathol Oncol Res 2019; 26:1625-1632. [PMID: 31506803 DOI: 10.1007/s12253-019-00745-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 09/03/2019] [Indexed: 01/19/2023]
Abstract
Downregulation of checkpoint protein kinase 2 (CHEK2), which is involved in DNA repair, is associated with poorer outcome in various tumors. Little is known about the role of CHEK2 in urothelial carcinoma of the bladder (UCB). In the present study, we investigated the prognostic impact of CHEK2 protein expression in stage pT1 UCB. This retrospective, single-center analysis was carried out in a cohort of patients initially diagnosed with a pT1 UCB between 2007 and 2015. Immunohistochemical (IHC) staining of CHEK2 was performed. CHEK2 expression was correlated with recurrence-free survival (RFS), progression-free survival (PFS), and cancer-specific survival (CSS) using Kaplan-Meier analysis and multivariable Cox regression analysis. The analysis included 126 patients (86% male, median age 71 years). Loss of immunohistochemical protein expression of CHEK2 (<10%) was associated with significantly worse PFS (p = 0.041). Likewise, CHEK2 loss identified a subgroup of patients with worse PFS in the high-risk groups with concomitant CIS (p = 0.044), multifocal tumors (p < 0.001) and tumor grading G3 according to WHO1973 (p = 0.009). Multivariable Cox regression analysis revealed both loss of CHEK2 expression (HR: 4.18, 95%-CI: 1.35-12.93; p = 0.013) and multifocal tumors (HR: 4.53, 95%-CI:1.29-15.92; p = 0.018) as the only predictive factors for progression. Loss of IHC expression of CHEK2 in pT1 UCB is an independent predictor for progression to muscle-invasive disease and is also associated with worse PFS. This could help to identify high-risk patients who would benefit from early cystectomy.
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18
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Teneng I, Picchi MA, Leng S, Dagucon CP, Ramalingam S, Tellez CS, Belinsky SA. DNA-PKc deficiency drives pre-malignant transformation by reducing DNA repair capacity in concert with reprogramming the epigenome in human bronchial epithelial cells. DNA Repair (Amst) 2019; 79:1-9. [PMID: 31055244 PMCID: PMC6551272 DOI: 10.1016/j.dnarep.2019.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/11/2019] [Accepted: 04/13/2019] [Indexed: 12/14/2022]
Abstract
The expression of DNA-dependent protein kinase catalytic subunit (DNA-PKc) is highly variable in smokers and reduced enzyme activity has been associated with risk for lung cancer. An in vitro model of lung pre-malignancy was used to evaluate the role of double-strand break DNA repair capacity in transformation of hTERT/CDK4 immortalized human bronchial epithelial cells (HBECs) and reprograming of the epigenome. Here we show that knockdown of DNA-PKc to levels simulating haploinsufficiency dramatically reduced DNA repair capacity following challenge with bleomycin and significantly increased transformation efficiency of HBEC lines exposed weekly for 12 weeks to this radiomimetic. Transformed HBEC lines with wild type or knockdown of DNA-PKc showed altered expression of more than 1,000 genes linked to major cell regulatory pathways involved in lung cancer. While lung cancer driver mutations were not detected in transformed clones, more than 300 genes that showed reduced expression associated with promoter methylation in transformed clones or predictive for methylation in malignant tumors were identified. These studies support reduced DNA repair capacity as a key factor in the initiation and clonal expansion of pre-neoplastic cells and double-strand break DNA damage as causal for epigenetic mediated silencing of many lung cancer-associated genes. The fact that DNA damage, repair, and epigenetic silencing of genes are causal for many other cancers that include colon and prostate extends the generalizability and impact of these findings.
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Affiliation(s)
- Ivo Teneng
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | - Maria A Picchi
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | - Shuguang Leng
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | | | - Suresh Ramalingam
- Department of Hematology and Oncology, Emory University School of Medicine, Winship Cancer Institute, Atlanta, GA, USA
| | - Carmen S Tellez
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | - Steven A Belinsky
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA.
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19
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Rabbani S, Sajid S, Mani V, Khan O, Salman MAA. Inhibitory effect of Salvadora persica (Miswak) against cigarette smoke-induced mutagenicity and sperm abnormalities in rats. Pharmacognosy Res 2019. [DOI: 10.4103/pr.pr_65_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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20
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Weng MW, Lee HW, Park SH, Hu Y, Wang HT, Chen LC, Rom WN, Huang WC, Lepor H, Wu XR, Yang CS, Tang MS. Aldehydes are the predominant forces inducing DNA damage and inhibiting DNA repair in tobacco smoke carcinogenesis. Proc Natl Acad Sci U S A 2018; 115:E6152-E6161. [PMID: 29915082 PMCID: PMC6142211 DOI: 10.1073/pnas.1804869115] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Tobacco smoke (TS) contains numerous cancer-causing agents, with polycyclic aromatic hydrocarbons (PAHs) and nitrosamines being most frequently cited as the major TS human cancer agents. Many lines of evidence seriously question this conclusion. To resolve this issue, we determined DNA adducts induced by the three major TS carcinogens: benzo(a)pyrene (BP), 4-(methylnitrosamine)-1-(3-pyridyl)-1-butanoe (NNK), and aldehydes in humans and mice. In mice, TS induces abundant aldehyde-induced γ-hydroxy-propano-deoxyguanosine (γ-OH-PdG) and α-methyl-γ-OH-PdG adducts in the lung and bladder, but not in the heart and liver. TS does not induce the BP- and NNK-DNA adducts in lung, heart, liver, and bladder. TS also reduces DNA repair activity and the abundance of repair proteins, XPC and OGG1/2, in lung tissues. These TS effects were greatly reduced by diet with polyphenols. We found that γ-OH-PdG and α-methyl-γ-OH-PdG are the major adducts formed in tobacco smokers' buccal cells as well as the normal lung tissues of tobacco-smoking lung cancer patients, but not in lung tissues of nonsmokers. However, the levels of BP- and NNK-DNA adducts are the same in lung tissues of smokers and nonsmokers. We found that while BP and NNK can induce BPDE-dG and O6-methyl-dG adducts in human lung and bladder epithelial cells, these inductions can be inhibited by acrolein. Acrolein also can reduce DNA repair activity and repair proteins. We propose a TS carcinogenesis paradigm. Aldehydes are major TS carcinogens exerting dominant effect: Aldehydes induce mutagenic PdG adducts, impair DNA repair functions, and inhibit many procarcinogens in TS from becoming DNA-damaging agents.
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Affiliation(s)
- Mao-Wen Weng
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - Hyun-Wook Lee
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - Sung-Hyun Park
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - Yu Hu
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - Hsing-Tsui Wang
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - Lung-Chi Chen
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987
| | - William N Rom
- Department of Medicine, New York University School of Medicine, New York, NY 10016
| | - William C Huang
- Department of Urology, New York University School of Medicine, New York, NY 10016
| | - Herbert Lepor
- Department of Urology, New York University School of Medicine, New York, NY 10016
| | - Xue-Ru Wu
- Department of Urology, New York University School of Medicine, New York, NY 10016
| | - Chung S Yang
- Department of Chemical Biology, Ernest Mario School of Pharmacy, Rutgers University, Piscataway, NJ 08854-0789
| | - Moon-Shong Tang
- Department of Environmental Medicine, New York University School of Medicine, Tuxedo Park, NY 10987;
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21
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Siddiqui MS, Francois M, Hecker J, Faunt J, Fenech MF, Leifert WR. γH2AX is increased in peripheral blood lymphocytes of Alzheimer's disease patients in the South Australian Neurodegeneration, Nutrition and DNA Damage (SAND) study of aging. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2018; 829-830:6-18. [PMID: 29704994 DOI: 10.1016/j.mrgentox.2018.03.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 03/06/2018] [Accepted: 03/07/2018] [Indexed: 12/27/2022]
Abstract
An early cellular response to DNA double-strand breaks is the phosphorylation of histone H2AX to form γH2AX. Although increased levels of γH2AX have been reported in neuronal nuclei of Alzheimer's disease (AD) patients, γH2AX responses in the lymphocytes of individuals with mild cognitive impairment (MCI) and AD remain unexplored. In this study, the endogenous γH2AX level was measured, using laser scanning cytometry (LSC) and visual scoring, in lymphocyte nuclei from MCI (n = 18), or AD (n = 20) patients and healthy controls (n = 40). Levels were significantly elevated in nuclei of the AD group compared to the MCI and control groups, and there was a concomitant increase, with a significant trend, from the control group through MCI to the AD group. A significant negative correlation was seen between γH2AX and the mini mental state examination (MMSE) score, when the analysis included all subjects. Receiver Operation Characteristic curves were carried out for different γH2AX parameters; visually scored percent cells containing overlapping γH2AX foci displayed the best area under the curve value of 0.9081 with 85% sensitivity and 92% specificity for the identification of AD patients versus control. Plasma homocysteine, creatinine, and chitinase-3-like protein 1 (CHI3L1) were positively correlated with lymphocyte γH2AX signals, while glomerular filtration rate (GFR) was negatively correlated. Finally, there was a diminished γH2AX response to X-rays in lymphocytes of the MCI and AD groups compared to the control group. Our results indicate that lymphocyte γH2AX levels are a potential marker for identifying individuals at increased risk of developing AD. Prospective studies with normal healthy individuals are needed to test whether there is indeed a link between γH2AX levels and AD risk.
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Affiliation(s)
- Mohammad Sabbir Siddiqui
- CSIRO Food and Nutrition, Personalised Nutrition and DNA Damage, Adelaide, South Australia, 5000, Australia; University of Adelaide, School of Agriculture, Food & Wine, Urrbrae, South Australia, 5064, Australia
| | - Maxime Francois
- CSIRO Food and Nutrition, Personalised Nutrition and DNA Damage, Adelaide, South Australia, 5000, Australia
| | - Jane Hecker
- Department of Internal Medicine, Royal Adelaide Hospital, Adelaide, South Australia, 5000, Australia
| | - Jeffrey Faunt
- Department of General Medicine, Royal Adelaide Hospital, Adelaide, South Australia, 5000, Australia
| | - Michael F Fenech
- CSIRO Food and Nutrition, Personalised Nutrition and DNA Damage, Adelaide, South Australia, 5000, Australia
| | - Wayne R Leifert
- CSIRO Food and Nutrition, Personalised Nutrition and DNA Damage, Adelaide, South Australia, 5000, Australia.
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22
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Solanki HS, Raja R, Zhavoronkov A, Ozerov IV, Artemov AV, Advani J, Radhakrishnan A, Babu N, Puttamallesh VN, Syed N, Nanjappa V, Subbannayya T, Sahasrabuddhe NA, Patil AH, Prasad TSK, Gaykalova D, Chang X, Sathyendran R, Mathur PP, Rangarajan A, Sidransky D, Pandey A, Izumchenko E, Gowda H, Chatterjee A. Targeting focal adhesion kinase overcomes erlotinib resistance in smoke induced lung cancer by altering phosphorylation of epidermal growth factor receptor. Oncoscience 2018; 5:21-38. [PMID: 29556515 PMCID: PMC5854290 DOI: 10.18632/oncoscience.395] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 12/15/2017] [Indexed: 12/25/2022] Open
Abstract
EGFR-based targeted therapies have shown limited success in smokers. Identification of alternate signaling mechanism(s) leading to TKI resistance in smokers is critically important. We observed increased resistance to erlotinib in H358 NSCLC (non-small cell lung carcinoma) cells chronically exposed to cigarette smoke (H358-S) compared to parental cells. SILAC-based mass-spectrometry approach was used to study altered signaling in H358-S cell line. Importantly, among the top phosphosites in H358-S cells we observed hyperphosphorylation of EGFR (Y1197) and non-receptor tyrosine kinase FAK (Y576/577). Supporting these observations, a transcriptomic-based pathway activation analysis of TCGA NSCLC datasets revealed that FAK and EGFR internalization pathways were significantly upregulated in smoking patients, compared to the never-smokers and were associated with elevated PI3K signaling and lower level of caspase cascade and E-cadherin pathways activation. We show that inhibition of FAK led to decreased cellular proliferation and invasive ability of the smoke-exposed cells, and restored their dependency on EGFR signaling. Our data suggests that activation of focal adhesion pathway significantly contributes to erlotinib resistance, and that FAK is a potential therapeutic target for management of erlotinib resistance in smoke-induced NSCLC.
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Affiliation(s)
- Hitendra S Solanki
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, India
| | - Remya Raja
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India
| | - Alex Zhavoronkov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA
| | - Ivan V Ozerov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA
| | - Artem V Artemov
- Insilico Medicine, Inc., Emerging Technology Centers, Johns Hopkins University at Eastern, Baltimore, MD 21218, USA
| | - Jayshree Advani
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | | | - Niraj Babu
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,Manipal Academy of Higher Education, Manipal, Karnataka 576104, India
| | - Vinuth N Puttamallesh
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,School of Biotechnology, Amrita University, Kollam 690525, India
| | - Nazia Syed
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India
| | | | | | | | - Arun H Patil
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, India.,Center for Systems Biology and Molecular Medicine, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - T S Keshava Prasad
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,Center for Systems Biology and Molecular Medicine, Yenepoya (Deemed to be University), Mangalore 575018, India.,NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore 560029, India
| | - Daria Gaykalova
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Xiaofei Chang
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Rachana Sathyendran
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, 560012, India
| | - Premendu Prakash Mathur
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, India
| | - Annapoorni Rangarajan
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore, 560012, India
| | - David Sidransky
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.,Department of Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.,Department of Oncology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.,Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Evgeny Izumchenko
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Harsha Gowda
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,Center for Systems Biology and Molecular Medicine, Yenepoya (Deemed to be University), Mangalore 575018, India
| | - Aditi Chatterjee
- Institute of Bioinformatics, International Tech Park, Bangalore 560066, India.,Center for Systems Biology and Molecular Medicine, Yenepoya (Deemed to be University), Mangalore 575018, India
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Solanki HS, Babu N, Jain AP, Bhat MY, Puttamallesh VN, Advani J, Raja R, Mangalaparthi KK, Kumar MM, Prasad TSK, Mathur PP, Sidransky D, Gowda H, Chatterjee A. Cigarette smoke induces mitochondrial metabolic reprogramming in lung cells. Mitochondrion 2017; 40:58-70. [PMID: 29042306 DOI: 10.1016/j.mito.2017.10.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 09/18/2017] [Accepted: 10/06/2017] [Indexed: 01/01/2023]
Abstract
Cellular transformation owing to cigarette smoking is due to chronic exposure and not acute. However, systematic studies to understand the molecular alterations in lung cells due to cigarette smoke are lacking. To understand these molecular alterations induced by chronic cigarette smoke exposure, we carried out tandem mass tag (TMT) based temporal proteomic profiling of lung cells exposed to cigarette smoke for upto 12months. We identified 2620 proteins in total, of which 671 proteins were differentially expressed (1.5-fold) after 12months of exposure. Prolonged exposure of lung cells to smoke for 12months revealed dysregulation of oxidative phosphorylation and overexpression of enzymes involved in TCA cycle. In addition, we also observed overexpression of enzymes involved in glutamine metabolism, fatty acid degradation and lactate synthesis. This could possibly explain the availability of alternative source of carbon to TCA cycle apart from glycolytic pyruvate. Our data indicates that chronic exposure to cigarette smoke induces mitochondrial metabolic reprogramming in cells to support growth and survival.
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Affiliation(s)
- Hitendra S Solanki
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Niraj Babu
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Manipal University, Madhav Nagar, Manipal 576104, India
| | - Ankit P Jain
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; School of Biotechnology, KIIT University, Bhubaneswar, Odisha 751024, India
| | - Mohd Younis Bhat
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Vinuth N Puttamallesh
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Jayshree Advani
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Manipal University, Madhav Nagar, Manipal 576104, India
| | - Remya Raja
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India
| | - Kiran K Mangalaparthi
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; Amrita School of Biotechnology, Amrita University, Kollam 690 525, India
| | - Mahesh M Kumar
- Department of Neuro-Virology, National Institute of Mental Health and Neurosciences, Bangalore 560029, India
| | - T S Keshava Prasad
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India; NIMHANS-IOB Proteomics and Bioinformatics Laboratory, Neurobiology Research Centre, National Institute of Mental Health and Neurosciences, Bangalore 560029, India; YU-IOB Center for Systems Biology and Molecular Medicine, Yenepoya University, Mangalore 575018, India
| | | | - David Sidransky
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Harsha Gowda
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India.
| | - Aditi Chatterjee
- Institute of Bioinformatics, International Tech Park, Bangalore 560 066, India.
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24
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Gonzalez-Suarez I, Martin F, Marescotti D, Guedj E, Acali S, Johne S, Dulize R, Baumer K, Peric D, Goedertier D, Frentzel S, Ivanov NV, Mathis C, Hoeng J, Peitsch MC. In Vitro Systems Toxicology Assessment of a Candidate Modified Risk Tobacco Product Shows Reduced Toxicity Compared to That of a Conventional Cigarette. Chem Res Toxicol 2015; 29:3-18. [DOI: 10.1021/acs.chemrestox.5b00321] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ignacio Gonzalez-Suarez
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Florian Martin
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Diego Marescotti
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Emmanuel Guedj
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Stefano Acali
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Stephanie Johne
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Remi Dulize
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Karine Baumer
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Dariusz Peric
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Didier Goedertier
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Stefan Frentzel
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Nikolai V. Ivanov
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Carole Mathis
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Julia Hoeng
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
| | - Manuel C. Peitsch
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland
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25
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Kogel U, Gonzalez Suarez I, Xiang Y, Dossin E, Guy PA, Mathis C, Marescotti D, Goedertier D, Martin F, Peitsch MC, Hoeng J. Biological impact of cigarette smoke compared to an aerosol produced from a prototypic modified risk tobacco product on normal human bronchial epithelial cells. Toxicol In Vitro 2015; 29:2102-15. [PMID: 26277032 DOI: 10.1016/j.tiv.2015.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 07/10/2015] [Accepted: 08/10/2015] [Indexed: 01/09/2023]
Abstract
Cigarette smoking causes serious and fatal diseases. The best way for smokers to avoid health risks is to quit smoking. Using modified risk tobacco products (MRTPs) may be an alternative to reduce the harm caused for those who are unwilling to quit smoking, but little is known about the toxic effects of MRTPs, nor were the molecular mechanisms of toxicity investigated in detail. The toxicity of an MRTP and the potential molecular mechanisms involved were investigated in high-content screening tests and whole genome transcriptomics analyses using human bronchial epithelial cells. The prototypic (p)MRTP that was tested had less impact than reference cigarette 3R4F on the cellular oxidative stress response and cell death pathways. Higher pMRTP aerosol extract concentrations had impact on pathways associated with the detoxification of xenobiotics and the reduction of oxidative damage. A pMRTP aerosol concentration up to 18 times higher than the 3R4F caused similar perturbation effects in biological networks and led to the perturbation of networks related to cell stress, and proliferation biology. These results may further facilitate the development of a systems toxicology-based impact assessment for use in future risk assessments in line with the 21st century toxicology paradigm, as shown here for an MRTP.
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Affiliation(s)
- U Kogel
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - I Gonzalez Suarez
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - Y Xiang
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - E Dossin
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - P A Guy
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - C Mathis
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - D Marescotti
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - D Goedertier
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - F Martin
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - M C Peitsch
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
| | - J Hoeng
- Philip Morris International R&D, Philip Morris Products S.A., Quai Jeanrenaud 5, 2000 Neuchâtel, Switzerland.
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26
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Siddiqui MS, François M, Fenech MF, Leifert WR. Persistent γH2AX: A promising molecular marker of DNA damage and aging. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2015; 766:1-19. [PMID: 26596544 DOI: 10.1016/j.mrrev.2015.07.001] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Revised: 07/13/2015] [Accepted: 07/14/2015] [Indexed: 12/12/2022]
Abstract
One of the earliest cellular responses to DNA double strand breaks (DSBs) is the phosphorylation of the core histone protein H2AX (termed γH2AX). Persistent γH2AX is the level of γH2AX above baseline, measured at a given time-point beyond which DNA DSBs are normally expected to be repaired (usually persist for days to months). This review summarizes the concept of persistent γH2AX in the context of exogenous source induced DNA DSBs (e.g. ionizing radiation (IR), chemotherapeutic drugs, genotoxic agents), and endogenous γH2AX levels in normal aging and accelerated aging disorders. Summary of the current literature demonstrates the following (i) γH2AX persistence is a common phenomenon that occurs in humans and animals; (ii) nuclei retain persistent γH2AX foci for up to several months after IR exposure, allowing for retrospective biodosimetry; (iii) the combination of various radiosensitizing drugs with ionizing radiation exposure leads to persistent γH2AX response, thus enabling the potential for monitoring cancer patients' response to chemotherapy and radiotherapy as well as tailoring cancer treatments; (iv) persistent γH2AX accumulates in telomeric DNA and in cells undergoing cellular senescence; and (v) increased endogenous γH2AX levels may be associated with diseases of accelerated aging. In summary, measurement of persistent γH2AX could potentially be used as a marker of radiation biodosimetry, evaluating sensitivity to therapeutic genotoxins and radiotherapy, and exploring the association of unrepaired DNA DSBs on telomeres with diseases of accelerated aging.
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Affiliation(s)
- Mohammad Sabbir Siddiqui
- CSIRO Food and Nutrition Flagship, Genome Health and Healthy Aging, Adelaide, South Australia 5000, Australia; University of Adelaide, School of Agriculture, Food & Wine, Urrbrae, South Australia 5064, Australia
| | - Maxime François
- CSIRO Food and Nutrition Flagship, Genome Health and Healthy Aging, Adelaide, South Australia 5000, Australia
| | - Michael F Fenech
- CSIRO Food and Nutrition Flagship, Genome Health and Healthy Aging, Adelaide, South Australia 5000, Australia
| | - Wayne R Leifert
- CSIRO Food and Nutrition Flagship, Genome Health and Healthy Aging, Adelaide, South Australia 5000, Australia.
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27
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Siddiqui MS, François M, Fenech MF, Leifert WR. γH2AX responses in human buccal cells exposed to ionizing radiation. Cytometry A 2014; 87:296-308. [DOI: 10.1002/cyto.a.22607] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/15/2014] [Accepted: 11/27/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Mohammad Sabbir Siddiqui
- CSIRO Food & Nutrition Flagship; Nutrigenomics & DNA Damage; Adelaide South Australia 5000 Australia
- University of Adelaide, School of Agriculture, Food & Wine; Urrbrae South Australia 5064 Australia
| | - Maxime François
- CSIRO Food & Nutrition Flagship; Nutrigenomics & DNA Damage; Adelaide South Australia 5000 Australia
| | - Michael F. Fenech
- CSIRO Food & Nutrition Flagship; Nutrigenomics & DNA Damage; Adelaide South Australia 5000 Australia
| | - Wayne R. Leifert
- CSIRO Food & Nutrition Flagship; Nutrigenomics & DNA Damage; Adelaide South Australia 5000 Australia
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28
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Garcia-Canton C, Errington G, Anadon A, Meredith C. Characterisation of an aerosol exposure system to evaluate the genotoxicity of whole mainstream cigarette smoke using the in vitro γH2AX assay by high content screening. BMC Pharmacol Toxicol 2014; 15:41. [PMID: 25056295 PMCID: PMC4122049 DOI: 10.1186/2050-6511-15-41] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 07/16/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The genotoxic effect of cigarette smoke is routinely measured by treating cells with cigarette Particulate Matter (PM) at different dose levels in submerged cell cultures. However, PM exposure cannot be considered as a complete exposure as it does not contain the gas phase component of the cigarette smoke. The in vitro γH2AX assay by High Content Screening (HCS) has been suggested as a complementary tool to the standard battery of genotoxicity assays as it detects DNA double strand breaks in a high-throughput fashion. The aim of this study was to further optimise the in vitro γH2AX assay by HCS to enable aerosol exposure of human bronchial epithelial BEAS-2B cells at the air-liquid interface (ALI). METHODS Whole mainstream cigarette smoke (WMCS) from two reference cigarettes (3R4F and M4A) were assessed for their genotoxic potential. During the study, a further characterisation of the Borgwaldt RM20S® aerosol exposure system to include single dilution assessment with a reference gas was also carried out. RESULTS The results of the optimisation showed that both reference cigarettes produced a positive genotoxic response at all dilutions tested. However, the correlation between dose and response was low for both 3R4F and M4A (Pearson coefficient, r = -0.53 and -0.44 respectively). During the additional characterisation of the exposure system, it was observed that several pre-programmed dilutions did not perform as expected. CONCLUSIONS Overall, the in vitro γH2AX assay by HCS could be used to evaluate WMCS in cell cultures at the ALI. Additionally, the extended characterisation of the exposure system indicates that assessing the performance of the dilutions could improve the existing routine QC checks.
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Affiliation(s)
- Carolina Garcia-Canton
- British American Tobacco, Group Research and Development, Regents Park Road, Southampton, Hampshire SO15 8TL, UK
- Department of Toxicology and Pharmacology, Universidad Complutense de Madrid, Madrid, Spain
| | - Graham Errington
- British American Tobacco, Group Research and Development, Regents Park Road, Southampton, Hampshire SO15 8TL, UK
| | - Arturo Anadon
- Department of Toxicology and Pharmacology, Universidad Complutense de Madrid, Madrid, Spain
| | - Clive Meredith
- British American Tobacco, Group Research and Development, Regents Park Road, Southampton, Hampshire SO15 8TL, UK
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29
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Nyunoya T, Mebratu Y, Contreras A, Delgado M, Chand HS, Tesfaigzi Y. Molecular processes that drive cigarette smoke-induced epithelial cell fate of the lung. Am J Respir Cell Mol Biol 2014; 50:471-82. [PMID: 24111585 DOI: 10.1165/rcmb.2013-0348tr] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Cigarette smoke contains numerous chemical compounds, including abundant reactive oxygen/nitrogen species and aldehydes, and many other carcinogens. Long-term cigarette smoking significantly increases the risk of various lung diseases, including chronic obstructive pulmonary disease and lung cancer, and contributes to premature death. Many in vitro and in vivo studies have elucidated mechanisms involved in cigarette smoke-induced inflammation, DNA damage, and autophagy, and the subsequent cell fates, including cell death, cellular senescence, and transformation. In this Translational Review, we summarize the known pathways underlying these processes in airway epithelial cells to help reveal future challenges and describe possible directions of research that could lead to better management and treatment of these diseases.
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Affiliation(s)
- Toru Nyunoya
- 1 Chronic Obstructive Pulmonary Disease Program, Lovelace Respiratory Research Institute, and
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30
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Fenech MF. Nutriomes and personalised nutrition for DNA damage prevention, telomere integrity maintenance and cancer growth control. Cancer Treat Res 2014; 159:427-441. [PMID: 24114494 DOI: 10.1007/978-3-642-38007-5_24] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
DNA damage at the base sequence and chromosome level is a fundamental cause of developmental and degenerative diseases. Multiple micronutrients and their interactions with the inherited and/or acquired genome determine DNA damage and genomic instability rates. The challenge is to identify for each individual the combination of micronutrients and their doses (i.e. the nutriome) that optimises genome stability, including telomere integrity and functionality and DNA repair. Using nutrient array systems with high-content analysis diagnostics of DNA damage, cell death and cell growth, it is possible to define, on an individual basis, the optimal nutriome for DNA damage prevention and cancer growth control. This knowledge can also be used to improve culture systems for cells used in therapeutics such as stem cells to ensure that they are not genetically aberrant when returned to the body. Furthermore, this information could be used to design dietary patterns that deliver the micronutrient combinations and concentrations required for preventing DNA damage by micronutrient deficiency or excess. Using this approach, new knowledge could be obtained to identify the dietary restrictions and/or supplementations required to control specific cancers, which is particularly important given that reliable validated advice is not yet available for those diagnosed with cancer.
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Affiliation(s)
- Michael F Fenech
- CSIRO Food and Nutritional Sciences, 10041, Adelaide BC, SA, 5000, Australia,
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31
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Matthaios D, Hountis P, Karakitsos P, Bouros D, Kakolyris S. H2AX a Promising Biomarker for Lung Cancer: A Review. Cancer Invest 2013; 31:582-99. [DOI: 10.3109/07357907.2013.849721] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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32
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Siddiqui MS, Filomeni E, Francois M, Collins SR, Cooper T, Glatz RV, Taylor PW, Fenech M, Leifert WR. Exposure of insect cells to ionising radiation in vivo induces persistent phosphorylation of a H2AX homologue (H2AvB). Mutagenesis 2013; 28:531-41. [DOI: 10.1093/mutage/get030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
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33
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Gebel S, Lichtner RB, Frushour B, Schlage WK, Hoang V, Talikka M, Hengstermann A, Mathis C, Veljkovic E, Peck M, Peitsch MC, Deehan R, Hoeng J, Westra JW. Construction of a computable network model for DNA damage, autophagy, cell death, and senescence. Bioinform Biol Insights 2013; 7:97-117. [PMID: 23515068 PMCID: PMC3596057 DOI: 10.4137/bbi.s11154] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Towards the development of a systems biology-based risk assessment approach for environmental toxicants, including tobacco products in a systems toxicology setting such as the “21st Century Toxicology”, we are building a series of computable biological network models specific to non-diseased pulmonary and cardiovascular cells/tissues which capture the molecular events that can be activated following exposure to environmental toxicants. Here we extend on previous work and report on the construction and evaluation of a mechanistic network model focused on DNA damage response and the four main cellular fates induced by stress: autophagy, apoptosis, necroptosis, and senescence. In total, the network consists of 34 sub-models containing 1052 unique nodes and 1538 unique edges which are supported by 1231 PubMed-referenced literature citations. Causal node-edge relationships are described using the Biological Expression Language (BEL), which allows for the semantic representation of life science relationships in a computable format. The Network is provided in .XGMML format and can be viewed using freely available network visualization software, such as Cytoscape.
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Affiliation(s)
- Stephan Gebel
- Philip Morris International R&D, Philip Morris Research Laboratories GmbH, Koeln, Germany
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34
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Darzynkiewicz Z, Zhao H, Halicka HD, Rybak P, Dobrucki J, Wlodkowic D. DNA damage signaling assessed in individual cells in relation to the cell cycle phase and induction of apoptosis. Crit Rev Clin Lab Sci 2012; 49:199-217. [PMID: 23137030 DOI: 10.3109/10408363.2012.738808] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Reviewed are the phosphorylation events reporting activation of protein kinases and the key substrates critical for the DNA damage signaling (DDS). These DDS events are detected immunocytochemically using phospho-specific Abs; flow cytometry or image-assisted cytometry provide the means to quantitatively assess them on a cell by cell basis. The multiparameter analysis of the data is used to correlate these events with each other and relate to the cell cycle phase, DNA replication and induction of apoptosis. Expression of γH2AX as a possible marker of induction of DNA double strand breaks is the most widely studied event of DDS. Reviewed are applications of this multiparameter approach to investigate constitutive DDS reporting DNA damage by endogenous oxidants byproducts of oxidative phosphorylation. Also reviewed are its applications to detect and explore mechanisms of DDS induced by variety of exogenous agents targeting DNA such as exogenous oxidants, ionizing radiation, radiomimetic drugs, UV light, DNA topoisomerase I and II inhibitors, DNA crosslinking drugs and variety of environmental genotoxins. Analysis of DDS induced by these agents provides often a wealth of information about mechanism of induction and the type of DNA damage (lesion) and is reviewed in the context of cell cycle phase specificity, DNA replication, and induction of apoptosis or cell senescence. Critically assessed is interpretation of the data as to whether the observed DDS events report induction of a particular type of DNA lesion.
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Affiliation(s)
- Zbigniew Darzynkiewicz
- Brander Cancer Research Institute and Department of Pathology, New York Medical College, Valhalla, NY 10595, USA.
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35
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Marcon F, Carotti D, Andreoli C, Siniscalchi E, Leopardi P, Caiola S, Biffoni M, Zijno A, Medda E, Nisticò L, Rossi S, Crebelli R. DNA damage response in monozygotic twins discordant for smoking habits. Mutagenesis 2012; 28:135-44. [PMID: 23132286 DOI: 10.1093/mutage/ges062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Previous studies in twins indicate that non-shared environment, beyond genetic factors, contributes substantially to individual variation in mutagen sensitivity; however, the role of specific causative factors (e.g. tobacco smoke, diet) was not elucidated. In this investigation, a population of 22 couples of monozygotic twins with discordant smoking habits was selected with the aim of evaluating the influence of tobacco smoke on individual response to DNA damage. The study design virtually eliminated the contribution of genetic heterogeneity to the intra-pair variation in DNA damage response, and thus any difference in the end-points investigated could directly be attributed to the non-shared environment experienced by co-twins, which included as main factor cigarette smoke exposure. Peripheral lymphocytes of study subjects were challenged ex vivo with γ-rays, and the induction, processing, fixation of DNA damage evaluated through multiple approaches. Folate status of study subjects was considered significant covariate since it is affected by smoking habits and can influence radiosensitivity. Similar responses were elicited by γ-rays in co-twins for all the end-points analysed, despite their discordant smoking habits. Folate status did not modify DNA damage response, even though a combined effect of smoking habits, low-plasma folic acid level, and ionising radiation was observed on apoptosis. A possible modulation of DNA damage response by duration and intensity of tobacco smoke exposure was suggested by Comet assay and micronucleus data, but the effect was quantitatively limited. Overall, the results obtained indicate that differences in smoking habits do not contribute to a large extent to inter-individual variability in the response to radiation-induced DNA damage observed in healthy human populations.
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Affiliation(s)
- Francesca Marcon
- Department of Environment and Primary Prevention, Istituto Superiore diSanità, V.le Regina Elena 299, 00161 Rome, Italy.
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36
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Choi CM, Yang SC, Jo HJ, Song SY, Jeon YJ, Jang TW, Kim DJ, Jang SH, Yang SH, Kim YD, Lee KH, Jang SJ, Kim YT, Kim DK, Chung DH, Kim L, Nam HS, Cho JH, Kim HJ, Ryu JS. Proteins involved in DNA damage response pathways and survival of stage I non-small-cell lung cancer patients. Ann Oncol 2012; 23:2088-2093. [PMID: 22317771 DOI: 10.1093/annonc/mdr606] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Biological complexity leads to significant variation in the survival of patients with stage I non-small-cell lung cancer (NSCLC). DNA damage response (DDR) pathways play a critical role in maintaining genomic stability and in the progression of NSCLC. Therefore, the development of a prognostic biomarker focusing on DDR pathways is an intriguing issue. PATIENTS AND METHODS Expression of several proteins (ATM, ATMpS1981, γH2AX, 53BP1, 53BP1pS25, Chk2, Chk2pT68, MDC1, MDC1pS964, BRCA1pS1423, and ERCC1) and overall survival were investigated in 889 pathological stage I NSCLC patients. RESULTS Low expression of BRCA1pS1423 or ERCC1 was significantly associated with worse survival in the whole cohort of patients. Analysis performed based on histology revealed that low expression of γH2AX, Chk2pT68, or ERCC1 was a poor prognostic factor in squamous cell carcinoma patients [adjusted hazard ratio (aHR), Cox P: 1.544, 0.012 for γH2AX; 1.624, 0.010 for Chk2pT68; 1.569, 0.011 for ERCC1]. The analysis of the interaction between two proteins showed that this effect was more pronounced in squamous cell carcinoma patients. However, these effects were not detected in adenocarcinoma patients. CONCLUSIONS The proteins involved in DDR pathways exhibited differential expression between squamous cell carcinoma and adenocarcinoma and were important determinants of survival in stage I squamous cell carcinoma patients.
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Affiliation(s)
- C M Choi
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, College of Medicine, University of Ulsan, Seoul
| | - S C Yang
- Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Seoul National University College of Medicine, Seoul
| | - H J Jo
- Department of Pathology, College of Medicine, Wonkwang University, Iksan
| | - S Y Song
- Department of Thoracic and Cardiovascular Surgery, Chonnam National University Hwasun Hospital, Hwasun-gun
| | - Y J Jeon
- Department of Internal Medicine, School of Medicine, Keimyung University, Daegu
| | - T W Jang
- Department of Internal Medicine, College of Medicine, Kosin University, Busan
| | - D J Kim
- Division of Respiratory and Allergy Medicine, Soonchunhyang University Hospital, College of Medicine, Bucheon
| | - S H Jang
- Division of Pulmonary, Allergy & Critical Care Medicine, Hallym University Sacred Heart Hospital, College of Medicine, Hallym University, Anyang
| | - S H Yang
- Department of Internal Medicine, Wonkwang University Hospital, Iksan
| | - Y D Kim
- Department of Thoracic Surgery, School of Medicine, Pusan National University, Busan
| | - K H Lee
- Department of Internal Medicine, Yeungnam University School of Medicine, Daegu
| | - S J Jang
- Department of Pathology, Asan Medical Center, College of Medicine, University of Ulsan, Seoul
| | - Y T Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University College of Medicine, Seoul
| | - D K Kim
- Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, College of Medicine, University of Ulsan, Seoul
| | - D H Chung
- Department of Pathology, Seoul National University College of Medicine, Seoul
| | | | - H S Nam
- Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon, Korea
| | - J H Cho
- Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon, Korea
| | - H J Kim
- Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon, Korea
| | - J S Ryu
- Pulmonary Division, Department of Internal Medicine, Inha University Hospital, Incheon, Korea.
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Garcia-Canton C, Anadón A, Meredith C. γH2AX as a novel endpoint to detect DNA damage: applications for the assessment of the in vitro genotoxicity of cigarette smoke. Toxicol In Vitro 2012; 26:1075-86. [PMID: 22735693 DOI: 10.1016/j.tiv.2012.06.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Revised: 05/17/2012] [Accepted: 06/14/2012] [Indexed: 01/02/2023]
Abstract
Histone H2AX is rapidly phosphorylated to become γH2AX after exposure to DNA-damaging agents that cause double-strand DNA breaks (DSBs). γH2AX can be detected and quantified by numerous methods, giving a direct correlation with the number of DSBs. This relationship has made γH2AX an increasingly utilised endpoint in multiple scientific fields since its discovery in 1998. Applications include its use in pre-clinical drug assessment, as a biomarker of DNA damage and in in vitro mechanistic studies. Here, we review current in vitro regulatory and non-regulatory genotoxicity assays proposing the γH2AX assay as a potential complement to the current test battery. Additionally, we evaluate the use of the γH2AX assay to measure DSBs in vitro in tobacco product testing.
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Affiliation(s)
- Carolina Garcia-Canton
- British American Tobacco, Group Research and Development, Regents Park Road, Southampton, Hampshire SO15 8TL, UK.
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Xu Y, Shi QL, Ma H, Zhou H, Lu Z, Yu B, Zhou X, Eriksson S, He E, Skog S. High thymidine kinase 1 (TK1) expression is a predictor of poor survival in patients with pT1 of lung adenocarcinoma. Tumour Biol 2011; 33:475-83. [PMID: 22143937 DOI: 10.1007/s13277-011-0276-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Accepted: 11/11/2011] [Indexed: 11/28/2022] Open
Abstract
In this study, we explore the association of thymidine kinase 1 (TK1) expression in tumour tissues with clinical pathological parameters and prognosis in patients with pathological T1 (pT1) lung adenocarcinoma. The expression of TK1 was studied by immunohistochemistry techniques in 80 patients with surgically resected pT1 lung adenocarcinoma, retrospectively and at >10-year follow-up. Compared to patients with low TK1 expression [labelling index (LI) <25.0%], patients with high TK1 expression (LI ≥ 25.0%) showed significantly increased lymphatic/vascular permeation and lymph node involvement and higher stromal invasion grade and pathological stage, and a greater number of patients had a tumour size of 2.1 to 3.0 cm. The 5-year survival and the mortality during follow-up for patients with high TK1 expression were significantly worse than that of patients with low TK1 expression. The prognoses of the cases with grade 0, grade 1 and grade 2 stromal invasions were similar and were better than those of cases with grade 3. In patients with stromal invasion grade 3, the 5-year survival and the mortality during follow-up were significantly worse for patients with high TK1 compared to patients with low TK1 expression. Univariate analyses showed that stromal invasion and TK1 expression were significant prognostic factors, while in the multivariate analysis, TK1 expression and tumour stage were found to be independent prognostic factors, but not stromal invasion. This is the first study showing that TK1 expression in combination with stromal invasion is a more reliable prognostic factor than stromal invasion classification itself in patients with pT1 lung adenocarcinoma. TK1 expression enables a further classification of the patients and opens opportunities for improved treatment outcome.
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Affiliation(s)
- Yan Xu
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University Medical School, 305 Zhongshangdong Road, Nanjing, 210002, Jiangsu Province, China
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Smart DJ, Ahmedi KP, Harvey JS, Lynch AM. Genotoxicity screening via the γH2AX by flow assay. Mutat Res 2011; 715:25-31. [PMID: 21824484 DOI: 10.1016/j.mrfmmm.2011.07.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 06/10/2011] [Accepted: 07/08/2011] [Indexed: 05/31/2023]
Abstract
The measurement of serine139-phosphorylated histone H2AX (γH2AX) provides a biomarker of DNA double-strand breaks (DSBs) and may identify potential genotoxic activity. In order to evaluate a flow cytometry assay for γH2AX detection (hereafter termed the γH2AX by flow assay), 6 prototypical (3 pro- and 3 proximate) genotoxins, i.e. dimethylbenz[a]anthracene (DMBA), 2-acetylaminofluorene (2-AAF), benzo[a]pyrene (B[a]P), methyl methane sulphonate (MMS), methyl nitrosourea (MNU) and 4-nitroquinoline oxide (4NQO), were selected to define assay evaluation criteria. In addition, 3 non-genotoxic cytotoxins (phthalic anhydride, n-butyl chloride and hexachloroethane) were included to investigate the influence of cytotoxicity on assay performance. At similar cytotoxicity levels (relative cell counts; RCC 75-40%) all prototypical genotoxins induced marked concentration-dependent increases in γH2AX compared with the non-genotoxins. As a result, assay evaluation criteria for a positive effect were defined as >1.5-fold γH2AX @ RCC >25%. Twenty five additional chemicals with diverse structures and genotoxic activity were selected to evaluate the γH2AX by flow assay. Results were compared with Ames bacterial and in vitro mammalian genotoxicity tests (mouse lymphoma assay and/or chromosome aberration assay). γH2AX by flow assay results were highly predictive of Ames (sensitivity 100%; specificity 67%; concordance 82%) and in vitro mammalian genotoxicity tests (sensitivity 91%; specificity 89%; concordance 91%) and provide additional evidence that γH2AX is a biomarker of potential genotoxic activity, underpinned mechanistically by the cellular response to DSBs. Discordant findings were predominately attributed to differences in specificity for some mammalian cell genotoxins that are Ames non-mutagens or for "biologically-irrelevant" positives in the mammalian tests. Simple anilines were classified as genotoxic following rat liver S9-mediated bioactivation, however, effects on γH2AX were atypical and limited to a small sub-population of S-phase nuclei. Nevertheless, the γH2AX by flow assay represents a novel genotoxicity assay with the potential to flag both pro- and proximate genotoxins.
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Affiliation(s)
- D J Smart
- Safety Assessment, GlaxoSmithKline R&D, Park Road, Ware, Hertfordshire SG12 0DP, UK.
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Karagiannis TC, Li X, Tang MM, Orlowski C, El-Osta A, Tang MLK, Royce SG. Molecular model of naphthalene-induced DNA damage in the murine lung. Hum Exp Toxicol 2011; 31:42-50. [PMID: 21508073 DOI: 10.1177/0960327111407228] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Airway epithelial damage and repair represents a novel therapeutic target in asthma and chronic obstructive pulmonary disease. An established mouse model of airway epithelial damage involves the Clara cell cytotoxicity of parenterally administered naphthalene, an important environmental toxicant with genotoxic and carcinogenic potential. The objective of the current study was to investigate naphthalene-induced toxicity and to identify and quantify DNA double-strand breaks in a murine naphthalene model of airway epithelial damage. Male C57/BL6 mice were injected with 200 mg/kg naphthalene and culled at 12-, 24-, 48- and 72-h time points. Lung function and bronchoalveolar lavage was performed and the lungs were dissected for histological analysis and for quantitation of DNA double-strand breaks using γH2AX as a molecular marker. Mice injected with naphthalene had increased epithelial denudation, bronchoalveolar lavage fluid cellularity and reactivity to nebulized methacholine chloride as compared to corn oil vehicle controls. Histological changes were most pronounced at the 12- and 24-h time points. DNA double-strand breaks, quantitated as the number of γH2AX foci per cell, were highest at the 24- and 48-h time points. All parameters had decreased at the 72-h time point, consistent with airway re-epithelization and cellular repair. Our findings indicate a time-dependent accumulation of γH2AX foci in mouse airway epithelial cells following administration of naphthalene. Naphthalene airway epithelial injury constitutes a model of DNA double-strand breaks in mice, which can be adapted as a suitable model for further investigation of genotoxic damage for evaluating the efficacy of potential therapeutics.
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Affiliation(s)
- Tom C Karagiannis
- Epigenomic Medicine, Baker IDI Heart and Diabetes Institute, Melbourne, VIC, Australia
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Ziech D, Franco R, Pappa A, Panayiotidis MI. Reactive oxygen species (ROS)--induced genetic and epigenetic alterations in human carcinogenesis. Mutat Res 2011; 711:167-73. [PMID: 21419141 DOI: 10.1016/j.mrfmmm.2011.02.015] [Citation(s) in RCA: 370] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 02/26/2011] [Accepted: 02/28/2011] [Indexed: 12/12/2022]
Abstract
Cancer is a multistage and complex process characterized by molecular alterations that underlie all three phases of its development: (i) initiation, (ii) promotion and (iii) progression. Some of these molecular events include alterations in gene expression that are regulated by both genetic and epigenetic mechanisms. On the other hand, "oxidative stress" implies a cellular state where ROS production exceeds the cell's ability to metabolize them resulting in excessive accumulation of ROS that overwhelms cellular defenses. Such state has been shown to regulate both genetic and epigenetic cascades underlying altered gene expression in human disease including cancer. Throughout this manuscript, we review the current state of knowledge on the role of ROS-induced oxidative stress in altering the genetic and epigenetic involvement during human carcinogenesis.
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Affiliation(s)
- Dominique Ziech
- Department of Student Success Services, University of Nevada, Reno, NV 89557, USA
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Zhao H, Halicka HD, Traganos F, Jorgensen E, Darzynkiewicz Z. New biomarkers probing depth of cell senescence assessed by laser scanning cytometry. Cytometry A 2011; 77:999-1007. [PMID: 20939035 PMCID: PMC2977923 DOI: 10.1002/cyto.a.20983] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The imaging analytical capabilities of laser scanning cytometer (LSC) have been used to assess morphological features considered to be typical of the senescent phenotype. The characteristic “flattening” of senescent cells was reflected by the decline in the density of staining (intensity of maximal pixel) of DNA-associated fluorescence [4,6-diamidino-2-phenylindole (DAPI)] paralleled by an increase in nuclear size (area). The decrease in ratio of maximal pixel to nuclear area was even more sensitive senescence biomarker than the change in maximal pixel or nuclear area, each alone. The saturation cell density at plateau phase of growth recorded by LSC was found to be dramatically decreased in cultures of senescent cells, thereby also serving as an additional marker. The induction of cyclin dependent kinase inhibitors p21WAF1 and p27KIP1 and γH2AX and activation of ATM markers of DNA damage response were measured in parallel with DNA/DAPI maximal pixel and nuclear area. These biomarker indices were expressed in quantitative terms by reporting them as a fraction of the respective controls. The effect of treatment of A549 and WI-38 cells with different concentrations of mitoxantrone (Mxt) and trichostatin A for various time periods was studied to assess the degree (depth) of cell senescence. Also assessed was the effect of 2-deoxy-d-glucose, the agent attenuating metabolic cell activity, on the depth of senescence induced by Mxt. A relationship between the ability of cells to synthesize RNA (incorporate 5-ethynyluridine) that leads to growth imbalance and induction of cell senescence was also studied. The data show that morphometric analysis of cellular attributes by LSC offers an attractive tool to detect cell senescence and measure its degree particularly in assessing effects of the factors that enhance or attenuate this process. This methodology is of importance in light of the evidence that cellular senescence is not only a biological process that is fundamental for organismal aging but also impedes formation of induced-pluripotent stem cells providing the barrier for neoplastic transformation and is the major mechanism of induction of reproductive cell death during treatment of solid tumors. © 2010 International Society for Advancement of Cytometry.
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Affiliation(s)
- Hong Zhao
- Department of Pathology, Brander Cancer Research Institute, New York Medical College, Valhalla, New York 10595, USA
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Darzynkiewicz Z, Traganos F, Zhao H, Halicka HD, Skommer J, Wlodkowic D. Analysis of individual molecular events of DNA damage response by flow- and image-assisted cytometry. Methods Cell Biol 2011; 103:115-47. [PMID: 21722802 DOI: 10.1016/b978-0-12-385493-3.00006-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This chapter describes molecular mechanisms of DNA damage response (DDR) and presents flow- and image-assisted cytometric approaches to assess these mechanisms and measure the extent of DDR in individual cells. DNA damage was induced by cell treatment with oxidizing agents, UV light, DNA topoisomerase I or II inhibitors, cisplatin, tobacco smoke, and by exogenous and endogenous oxidants. Chromatin relaxation (decondensation) is an early event of DDR chromatin that involves modification of high mobility group proteins (HMGs) and histone H1 and was detected by cytometry by analysis of the susceptibility of DNA in situ to denaturation using the metachromatic fluorochrome acridine orange. Translocation of the MRN complex consisting of Meiotic Recombination 11 Homolog A (Mre11), Rad50 homolog, and Nijmegen Breakage Syndrome 1 (NMR1) into DNA damage sites was assessed by laser scanning cytometry as the increase in the intensity of maximal pixel as well as integral value of Mre11 immunofluorescence. Examples of cytometric detection of activation of Ataxia telangiectasia mutated (ATM), and Check 2 (Chk2) protein kinases using phospho-specific Abs targeting Ser1981 and Thr68 of these proteins, respectively are also presented. We also discuss approaches to correlate activation of ATM and Chk2 with phosphorylation of p53 on Ser15 and histone H2AX on Ser139 as well as with cell cycle position and DNA replication. The capability of laser scanning cytometry to quantify individual foci of phosphorylated H2AX and/or ATM that provides more dependable assessment of the presence of DNA double-strand breaks is outlined. The new microfluidic Lab-on-a-Chip platforms for interrogation of individual cells offer a novel approach for DDR cytometric analysis.
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Affiliation(s)
- Zbigniew Darzynkiewicz
- Brander Cancer Research Institute and Department of Pathology, New York Medical College, Valhalla, NY, USA
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45
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Fenech MF. Nutriomes and nutrient arrays - the key to personalised nutrition for DNA damage prevention and cancer growth control. Genome Integr 2010; 1:11. [PMID: 20704708 PMCID: PMC2927499 DOI: 10.1186/2041-9414-1-11] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Accepted: 08/12/2010] [Indexed: 11/26/2022] Open
Abstract
DNA damage at the base-sequence, epigenome and chromosome level is a fundamental cause of developmental and degenerative diseases. Multiple micronutrients and their interactions with the inherited and/or acquired genome determine DNA damage and genomic instability rates. The challenge is to identify for each individual the combination of micronutrients and their doses (i.e. the nutriome) that optimises genome stability and DNA repair. In this paper I describe and propose the use of high-throughput nutrient array systems with high content analysis diagnostics of DNA damage, cell death and cell growth for defining, on an individual basis, the optimal nutriome for DNA damage prevention and cancer growth control.
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Affiliation(s)
- Michael F Fenech
- CSIRO Food and Nutritional Sciences, PO Box 10041 Adelaide BC, SA, 5000, Australia.
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Zhao H, Traganos F, Darzynkiewicz Z. Kinetics of the UV-induced DNA damage response in relation to cell cycle phase. Correlation with DNA replication. Cytometry A 2010; 77:285-93. [PMID: 20014310 DOI: 10.1002/cyto.a.20839] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
It has been reported that exposure to UV light triggers DNA damage response (DDR) seen as induction of gammaH2AX not only in S- but also in G(1)-phase cells. In the present study, in addition to gammaH2AX, we assessed other markers of DDR, namely phosphorylation of ATM on Ser1981, of ATM/ATR substrate on Ser/Thr at SQ/TQ cluster domains and of the tumor suppressor p53 on Ser15, in human pulmonary carcinoma A549 cells irradiated with 50 J/m(2) of UV-B. Phosphorylation of these proteins detected with phospho-specific Abs and measured by laser scanning cytometry in relation the cell cycle phase was found to be selective to S-phase cells. The kinetics of phosphorylation of ATM was strikingly similar to that of ATM/ATR substrate, peaking at 30 min after UV irradiation and followed by rapid dephosphorylation. The peak of H2AX phosphorylation was seen at 2 h and the peak of p53 phosphorylation at 4 h after exposure to UV light. Local high spatial density of these phospho-proteins reported by intensity of maximal pixel of immunofluorescence in the DDR nuclear foci was distinctly more pronounced in the early compared to late portion of S-phase. Exposure of cells to UV following 1 h pulse-labeling of their DNA with 5-ethynyl-2'deoxyuridine (EdU) made it possible to correlate the extent of DNA replication during the pulse with the extent of the UV-induced H2AX phosphorylation within the same cells. This correlation was very strong (R(2) = 0.98) and the cells that did not incorporate EdU showed no evidence of H2AX phosphorylation. The data are consistent with the mechanism in which stalling of DNA replication forks upon collision with the primary UV-induced DNA lesions and likely formation of double-strand DNA breaks triggers DDR. The prior reports (including our own) on induction of gammaH2AX in G(1) cells by UV may have erroneously identified cells initiating DNA replication following UV exposure as G(1) cells due to the fact that their DNA content did not significantly differ from that of G(1) cells that had not initiated DNA replication.
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Affiliation(s)
- Hong Zhao
- Department of Pathology, Brander Cancer Research Institute, New York Medical College, Valhalla, New York 10595, USA
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Jorgensen ED, Zhao H, Traganos F, Albino AP, Darzynkiewicz Z. DNA damage response induced by exposure of human lung adenocarcinoma cells to smoke from tobacco- and nicotine-free cigarettes. Cell Cycle 2010; 9:2170-6. [PMID: 20404482 PMCID: PMC3032023 DOI: 10.4161/cc.9.11.11842] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cigarette smoke (CS) is the major cause of lung cancer and contributes to the development of other malignancies. Attempts have been made to construct reduced toxicity cigarettes, presumed to have diminished genotoxic potential. One such product on the market is the tobacco and nicotine free (T&N-free) cigarette type made from lettuce and herbal extracts. We have recently developed a sensitive assay of the genotoxicity of CS based on cytometric analysis of induction of the DNA damage response (DDR) in normal human pulmonary endothelial or A549 pulmonary adenocarcinoma cells. In the present study, we observed that exposure of A549 cells to CS from T/N-free cigarettes induced a smoke-dose dependent DDR as evidenced by phosphorylation (activation) of the Ataxia telangiectasia mutated (ATM) protein kinase and of the histone H2AX (γH2AX). The extent of DDR induced by T&N-free smoke was distinctly greater than that induced by comparable doses of CS from reference cigarettes (2R4F) containing tobacco and nicotine. The pattern of DDR induced by T&N-free smoke was similar to that of 2R4F cigarettes in terms of the cell cycle phase specificity and involvement of reactive oxygen species (ROS). The data also imply that similar to 2R4F exposure of cells to T/N-free smoke leads to formation of double-strand DNA breaks (DSBs) resulting from collapse of replication forks upon collision with the primary ssDNA lesions induced by smoke. Since DSBs are potentially carcinogenic our data indicate that smoking tobacco and nicotine-free cigarettes is at least as hazardous as smoking cigarettes containing tobacco and nicotine.
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Affiliation(s)
- Ellen D. Jorgensen
- Brander Cancer Research Institute and Department of Pathology; New York Medical College; Valhalla, NY USA
- Vector Research LLC; New York, NY USA
| | - Hong Zhao
- Brander Cancer Research Institute and Department of Pathology; New York Medical College; Valhalla, NY USA
| | - Frank Traganos
- Brander Cancer Research Institute and Department of Pathology; New York Medical College; Valhalla, NY USA
| | | | - Zbigniew Darzynkiewicz
- Brander Cancer Research Institute and Department of Pathology; New York Medical College; Valhalla, NY USA
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Das A, Chakrabarty S, Choudhury D, Chakrabarti G. 1,4-Benzoquinone (PBQ) Induced Toxicity in Lung Epithelial Cells Is Mediated by the Disruption of the Microtubule Network and Activation of Caspase-3. Chem Res Toxicol 2010; 23:1054-66. [DOI: 10.1021/tx1000442] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amlan Das
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB, India 700019
| | - Subhendu Chakrabarty
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB, India 700019
| | - Diptiman Choudhury
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB, India 700019
| | - Gopal Chakrabarti
- Department of Biotechnology and Dr. B. C. Guha Centre for Genetic Engineering and Biotechnology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, WB, India 700019
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50
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Tárnok A. Cytometric rulers with nanometer scaling. Cytometry A 2009; 75:811-2. [PMID: 19764078 DOI: 10.1002/cyto.a.20798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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