1
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Yang Z, Liu S, Pan X. Research progress on mitochondrial damage and repairing in oocytes: A review. Mitochondrion 2024; 75:101845. [PMID: 38237648 DOI: 10.1016/j.mito.2024.101845] [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: 06/19/2023] [Revised: 01/04/2024] [Accepted: 01/14/2024] [Indexed: 01/26/2024]
Abstract
Oocytes are the female germ cells, which are susceptible to stress stimuli. The development of oocytes in the ovary is affected by many environmental and metabolic factors, food toxins, aging, and pathological factors. Mitochondria are the main target organelles of these factors, and the damage to mitochondrial structure and function can affect the production of ATP, the regulation of redox reactions, and apoptosis in oocytes. Mitochondrial damage is closely related to the decrease in oocyte quality and is the main factor leading to female infertility. Antioxidant foods or drugs have been used to prevent mitochondrial damage from some stressors or to repair damaged mitochondria, thereby improving oocyte development and female reproductive outcomes. In this paper, the damage of mitochondria during oocyte development by the above factors has been reviewed, and the relevant measures to alleviate the damage of mitochondria in oocytes have been discussed. Our findings may provide a theoretical basis and experimental basis for improving female fertility.
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Affiliation(s)
- Zheqing Yang
- Center for Reproductive Medicine, Jilin Medical University, Jilin 132013, Jilin, China
| | - Sitong Liu
- Department of Anatomy, Jilin Medical University, Jilin 132013, Jilin, China
| | - Xiaoyan Pan
- Center for Reproductive Medicine, Jilin Medical University, Jilin 132013, Jilin, China.
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2
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Sex Differences in X-ray-Induced Endothelial Damage: Effect of Taurine and N-Acetylcysteine. Antioxidants (Basel) 2022; 12:antiox12010077. [PMID: 36670939 PMCID: PMC9854489 DOI: 10.3390/antiox12010077] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 01/01/2023] Open
Abstract
Ionizing radiation (IR) can induce some associated pathological conditions due to numerous cell damages. The influence of sex is scarcely known, and even less known is whether the effect of antioxidants is sex-dependent. Given the increased use of IR, we investigated whether male human umbilical vein endothelial cells (MHUVECs) and female human umbilical vein endothelial cells (FHUVECs) respond differently to IR exposure and whether the antioxidants 10 mM taurine (TAU) and 5 mM N-acetylcysteine (NAC) can prevent IR-induced damage in a sex-dependent way. In untreated cells, sex differences were observed only during autophagy, which was higher in FHUVECs. In non-irradiated cells, preincubation with TAU and NAC did not modify viability, lactate dehydrogenase (LDH) release, migration, or autophagy, whereas only NAC increased malondialdehyde (MDA) levels in FHUVECs. X-ray irradiation increased LDH release and reduced viability and migration in a sex-independent manner. TAU and NAC did not affect viability while reduced LDH release in irradiated cells: they have the same protective effect in FHUVECs, while, TAU was more protective than NAC in male cells.. Moreover, TAU and NAC significantly promoted the closure of wounds in both sexes in irradiated cells, but NAC was more effective at doing this in FHUVECs. In irradiated cells, TAU did not change autophagy, while NAC attenuated the differences between the sexes. Finally, NAC significantly decreased MDA in MHUVECs and increased MDA in FHUVECs. In conclusion, FHUVECs appear to be more susceptible to IR damage, and the effects of the two antioxidants present some sex differences, suggesting the need to study the influence of sex in radiation mitigators.
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3
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Extraterrestrial Gynecology: Could Spaceflight Increase the Risk of Developing Cancer in Female Astronauts? An Updated Review. Int J Mol Sci 2022; 23:ijms23137465. [PMID: 35806469 PMCID: PMC9267413 DOI: 10.3390/ijms23137465] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 02/04/2023] Open
Abstract
Outer space is an extremely hostile environment for human life, with ionizing radiation from galactic cosmic rays and microgravity posing the most significant hazards to the health of astronauts. Spaceflight has also been shown to have an impact on established cancer hallmarks, possibly increasing carcinogenic risk. Terrestrially, women have a higher incidence of radiation-induced cancers, largely driven by lung, thyroid, breast, and ovarian cancers, and therefore, historically, they have been permitted to spend significantly less time in space than men. In the present review, we focus on the effects of microgravity and radiation on the female reproductive system, particularly gynecological cancer. The aim is to provide a summary of the research that has been carried out related to the risk of gynecological cancer, highlighting what further studies are needed to pave the way for safer exploration class missions, as well as postflight screening and management of women astronauts following long-duration spaceflight.
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4
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Mfarej MG, Skibbens RV. Genetically induced redox stress occurs in a yeast model for Roberts syndrome. G3 (BETHESDA, MD.) 2022; 12:6460337. [PMID: 34897432 PMCID: PMC9210317 DOI: 10.1093/g3journal/jkab426] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 11/01/2021] [Indexed: 12/31/2022]
Abstract
Roberts syndrome (RBS) is a multispectrum developmental disorder characterized by severe limb, craniofacial, and organ abnormalities and often intellectual disabilities. The genetic basis of RBS is rooted in loss-of-function mutations in the essential N-acetyltransferase ESCO2 which is conserved from yeast (Eco1/Ctf7) to humans. ESCO2/Eco1 regulate many cellular processes that impact chromatin structure, chromosome transmission, gene expression, and repair of the genome. The etiology of RBS remains contentious with current models that include transcriptional dysregulation or mitotic failure. Here, we report evidence that supports an emerging model rooted in defective DNA damage responses. First, the results reveal that redox stress is elevated in both eco1 and cohesion factor Saccharomyces cerevisiae mutant cells. Second, we provide evidence that Eco1 and cohesion factors are required for the repair of oxidative DNA damage such that ECO1 and cohesin gene mutations result in reduced cell viability and hyperactivation of DNA damage checkpoints that occur in response to oxidative stress. Moreover, we show that mutation of ECO1 is solely sufficient to induce endogenous redox stress and sensitizes mutant cells to exogenous genotoxic challenges. Remarkably, antioxidant treatment desensitizes eco1 mutant cells to a range of DNA damaging agents, raising the possibility that modulating the cellular redox state may represent an important avenue of treatment for RBS and tumors that bear ESCO2 mutations.
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Affiliation(s)
- Michael G Mfarej
- Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA
| | - Robert V Skibbens
- Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA
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5
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Barreiro-Lage D, Nicolafrancesco C, Kočišek J, Luna A, Kopyra J, Alcamí M, Huber BA, Martín F, Domaracka A, Rousseau P, Díaz-Tendero S. Controlling the diversity of ion-induced fragmentation pathways by N-methylation of amino acids. Phys Chem Chem Phys 2022; 24:941-954. [PMID: 34913940 DOI: 10.1039/d1cp04097a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of singly and doubly N-methylated glycine (sarcosine and N,N-dimethyl glycine, respectively) induced by low-energy (keV) O6+ ions. Multicoincidence mass spectrometry techniques and quantum chemistry simulations (ab initio molecular dynamics and density functional theory) allow us to characterise different fragmentation pathways as well as the associated mechanisms. We focus on the fragmentation of doubly ionised species, for which coincidence measurements provide unambiguous information on the origin of the various charged fragments. We have found that single N-methylation leads to a larger variety of fragmentation channels than in no methylation of glycine, while double N-methylation effectively closes many of these fragmentation channels, including some of those appearing in pristine glycine. Importantly, the closure of fragmentation channels in the latter case does not imply a protective effect by the methyl group.
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Affiliation(s)
- Darío Barreiro-Lage
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain.
| | - Chiara Nicolafrancesco
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France. .,Synchrotron SOLEIL, LOrme des Merisiers, St Aubin, BP 48, Gif sur Yvette Cedex 91192, France
| | - Jaroslav Kočišek
- J. Heyrovsky Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejskova 3, Prague 18223, Czech Republic
| | - Alberto Luna
- Centro de Computación Científica, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, Siedlce 08-110, Poland
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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6
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Grosfeld EV, Bidiuk VA, Mitkevich OV, Ghazy ESMO, Kushnirov VV, Alexandrov AI. A Systematic Survey of Characteristic Features of Yeast Cell Death Triggered by External Factors. J Fungi (Basel) 2021; 7:886. [PMID: 34829175 PMCID: PMC8626022 DOI: 10.3390/jof7110886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/15/2021] [Accepted: 10/17/2021] [Indexed: 12/20/2022] Open
Abstract
Cell death in response to distinct stimuli can manifest different morphological traits. It also depends on various cell death signaling pathways, extensively characterized in higher eukaryotes but less so in microorganisms. The study of cell death in yeast, and specifically Saccharomyces cerevisiae, can potentially be productive for understanding cell death, since numerous killing stimuli have been characterized for this organism. Here, we systematized the literature on external treatments that kill yeast, and which contains at least minimal data on cell death mechanisms. Data from 707 papers from the 7000 obtained using keyword searches were used to create a reference table for filtering types of cell death according to commonly assayed parameters. This table provides a resource for orientation within the literature; however, it also highlights that the common view of similarity between non-necrotic death in yeast and apoptosis in mammals has not provided sufficient progress to create a clear classification of cell death types. Differences in experimental setups also prevent direct comparison between different stimuli. Thus, side-by-side comparisons of various cell death-inducing stimuli under comparable conditions using existing and novel markers that can differentiate between types of cell death seem like a promising direction for future studies.
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Affiliation(s)
- Erika V. Grosfeld
- Moscow Institute of Physics and Technology, 9 Institutskiy per, Dolgoprudny, 141700 Moscow, Russia;
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
| | - Victoria A. Bidiuk
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
| | - Olga V. Mitkevich
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
| | - Eslam S. M. O. Ghazy
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
- Institute of Biochemical Technology and Nanotechnology, Peoples’ Friendship University of Russia (RUDN), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
- Department of Microbiology, Faculty of Pharmacy, Tanta University, Tanta 31111, Egypt
| | - Vitaliy V. Kushnirov
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
| | - Alexander I. Alexandrov
- Federal Research Center of Biotechnology of the RAS, Bach Institute of Biochemistry, 119071 Moscow, Russia; (V.A.B.); (O.V.M.); (E.S.M.O.G.); (V.V.K.)
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7
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Bhardwaj JK, Saraf P. N-acetyl-l-cysteine mediated regulation of DNA fragmentation, an apoptotic event, against methoxychlor toxicity in the granulosa cells of ovarian antral follicles. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2020; 858-860:503222. [DOI: 10.1016/j.mrgentox.2020.503222] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 10/23/2022]
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8
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Bicheru NS, Haidoiu C, Călborean O, Popa A, Porosnicu I, Hertzog R. Effect of Different Antioxidants on X-ray Induced DNA Double-strand Breaks Using γ-H2AX in Human Blood Lymphocytes. HEALTH PHYSICS 2020; 119:101-108. [PMID: 32483045 DOI: 10.1097/hp.0000000000001267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Ionizing radiation exposure produces direct or indirect biological effects on genomic DNA. The latter are ionizing radiation mediated by induction of free radicals and oxygen species (ROS). The study was conducted to evaluate the dose-effect/time-effect of antioxidant treatments in reducing the induction of double-strand breaks in human blood lymphocytes. Human peripheral blood samples of 2 mL each from healthy donors were irradiated with 10 mGy after pre-incubation with different antioxidants (β-carotene, vitamin E, vitamin C, N-acetyl L-cysteine). In order to assess their efficiency as prophylactic therapy for irradiation, various concentrations and combinations of antioxidants, as well as different incubation times, have been evaluated. To assess double-strand breaks induced by ionizing radiation, the phosphorylated histone γ-H2AX has been used. A significant reduction (p < 0.001) in double-strand breaks studied with a γ-H2AX assay was observed with N-acetyl L-cysteine with a 1-h incubation time, followed by vitamin C, vitamin E, and β-carotene. The use of antioxidants, especially N-acetyl L-cysteine before irradiation, significantly decreased the occurrence of double-strand breaks, demonstrating the potential radiological protection for exposure to ionizing radiation.
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Affiliation(s)
| | | | | | - Adrian Popa
- Military Medical Research Center, Bucharest, Romania
| | - Ioana Porosnicu
- National Institute for Laser Plasma and Radiation Physics, Bucharest, Romania
| | - Radu Hertzog
- Military Medical Research Center, Bucharest, Romania
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9
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Wang Y, Li L, Fan LH, Jing Y, Li J, Ouyang YC, Wang ZB, Hou Y, Sun QY. N-acetyl-L-cysteine (NAC) delays post-ovulatory oocyte aging in mouse. Aging (Albany NY) 2020; 11:2020-2030. [PMID: 30978175 PMCID: PMC6503888 DOI: 10.18632/aging.101898] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 03/31/2019] [Indexed: 01/17/2023]
Abstract
The quality of post-ovulatory oocytes decreases with aging. In this study, we aimed to investigate the effects of N-acetyl-L-cysteine (NAC), a broadly used antioxidant, on oocyte quality in mouse post-ovulatory oocyte aging in vitro. NAC at 0.6mM concentration was added to culture medium (M2), and the quality of oocytes was analyzed at 6h, 12h, 18h and 24h of culture. We found that the frequency of spindle defects decreased in NAC-treated oocytes compared to those without NAC treatment. NAC treatment significantly decreased abnormal distribution of cortical granules (CGs) in oocytes during aging for 18h and 24h. Decreased intracellular reactive oxygen species (ROS) was also observed. Increased intracellular ATP levels and decreased abnormal distribution of mitochondria could be observed with NAC supplementation during post-ovulatory oocyte aging in vitro. These results indicate that NAC will maintain the quality of oocytes, and delay post-ovulatory oocyte aging as studied in the mouse.
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Affiliation(s)
- Yue Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Li Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Li-Hua Fan
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Ying Jing
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Jian Li
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,Department of Reproductive Medicine, Peking University Shenzhen Hospital, Shenzhen Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Ying-Chun Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Zhen-Bo Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yi Hou
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Qing-Yuan Sun
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
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10
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Mercantepe F, Topcu A, Rakici S, Tumkaya L, Yilmaz A. The effects of N-acetylcysteine on radiotherapy-induced small intestinal damage in rats. Exp Biol Med (Maywood) 2019; 244:372-379. [PMID: 30786762 PMCID: PMC6488866 DOI: 10.1177/1535370219831225] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 01/22/2019] [Indexed: 01/01/2023] Open
Abstract
IMPACT STATEMENT Some six million cancer patients currently receive radiotherapy. Radiotherapy eliminates cancer cells by accelerating their death. However, radiotherapy is not selective, and it therefore harms healthy tissues around cancerous tissue. The latest studies have shown that the irradiation of biological materials causes a rapid increase in reactive oxygen species (ROS) in the tissue as a result of exposure of the target molecule to direct and indirect ionization. N-acetylcysteine (NAC) is an antioxidant that permits the elimination of free oxygen radicals and that contributes to glutathione synthesis. Our study, therefore, examined the effects of radiation resulting from radiotherapy on the small intestine at the molecular level, and prospectively considered the potential protective characteristics of NAC against gastrointestinal syndrome resulting from radiotherapy.
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Affiliation(s)
- Filiz Mercantepe
- Department of Internal Medicine, Recep Tayyip Erdogan
University, Rize 53010, Turkey
| | - Atilla Topcu
- Department of Pharmacology, Recep Tayyip Erdogan University,
Rize 53010, Turkey
| | - Sema Rakici
- Department of Radiation Oncology, Recep Tayyip Erdogan
University, Rize 53010, Turkey
| | - Levent Tumkaya
- Department of Histology and Embryology, Recep Tayyip Erdogan
University, Rize 53010, Turkey
| | - Adnan Yilmaz
- Department of Biochemistry, Faculty of Medicine, Recep Tayyip
Erdogan University, Rize 53010, Turkey
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11
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Moniruzzaman R, Rehman MU, Zhao QL, Jawaid P, Mitsuhashi Y, Imaue S, Fujiwara K, Ogawa R, Tomihara K, Saitoh JI, Noguchi K, Kondo T, Noguchi M. Roles of intracellular and extracellular ROS formation in apoptosis induced by cold atmospheric helium plasma and X-irradiation in the presence of sulfasalazine. Free Radic Biol Med 2018; 129:537-547. [PMID: 30355525 DOI: 10.1016/j.freeradbiomed.2018.10.434] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/11/2018] [Accepted: 10/19/2018] [Indexed: 12/11/2022]
Abstract
Sulfasalazine (SSZ) is a well-known anti-inflammatory drug and also an inhibitor of the cystine-glutamate antiporter that is known to reduce intracellular glutathione (GSH) level and increase cellular oxidative stress, indicating its anti-tumor potential. However, the combination of SSZ with other physical modalities remains unexplored. Here, the effects of SSZ on cold atmospheric helium plasma (He-CAP), which produces approximately 24 x higher concentration of hydroxyl radicals (. OH) compared to X-irradiation (IR) in aqueous solution, and on IR-induced apoptosis in human leukemia Molt-4 cells were studied to elucidate the mechanism of apoptosis enhancement. Both the Annexin V-FITC/PI and DNA fragmentation assay revealed that pre-treatment of cells with SSZ significantly enhanced He-CAP and IR-induced apoptosis. Similar enhancement was observed during the loss of mitochondrial membrane potential, intracellular Ca2+ ions, and mitochondria- and endoplasmic reticulum-related proteins. The concentration of intracellular reactive oxygen species (ROS) was much higher in He-CAP treated cells than in X-irradiated cells. On the other hand, strong enhancement of Fas expression and caspase-8 and -3 activities were only observed in X-irradiated cells. It might be possible that the higher concentration of intracellular and extracellular ROS suppressed caspase activities and Fas expression in He-CAP-treated cells. Notably, pretreating the cells with an antioxidant N-acetyl-L-cysteine (NAC) dramatically decreased apoptosis in cells treated by He-CAP, but not by IR. These results suggest that IR-induced apoptosis is due to specific and effective ROS distribution since intracellular ROS formation is marginal and the high production of ROS inside and outside of cells plays unique roles in He-CAP induced apoptosis. We conclude that our data provides efficacy and mechanistic insights for SSZ, which might be helpful for establishing SSZ as a future sensitizer in He-CAP or IR therapy for cancer.
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Affiliation(s)
- Rohan Moniruzzaman
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan; Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Mati Ur Rehman
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Qing-Li Zhao
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Paras Jawaid
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yohei Mitsuhashi
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Shuichi Imaue
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kumiko Fujiwara
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Ryohei Ogawa
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kei Tomihara
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Jun-Ichi Saitoh
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kyo Noguchi
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Takashi Kondo
- Department of Radiology, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
| | - Makoto Noguchi
- Department of Oral & Maxillofacial Surgery, Graduate School of Medicine & Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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12
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An investigation of the effects of N-acetylcysteine on radiotherapy-induced testicular injury in rats. Naunyn Schmiedebergs Arch Pharmacol 2018; 392:147-157. [DOI: 10.1007/s00210-018-1581-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/07/2018] [Indexed: 12/14/2022]
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13
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Zhang M, Cao G, Guo X, Gao Y, Li W, Lu D. A Comet Assay for DNA Damage and Repair After Exposure to Carbon-Ion Beams or X-rays in Saccharomyces Cerevisiae. Dose Response 2018; 16:1559325818792467. [PMID: 30116170 PMCID: PMC6088507 DOI: 10.1177/1559325818792467] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 07/09/2018] [Accepted: 07/10/2018] [Indexed: 11/17/2022] Open
Abstract
Ionizing radiation (IR) can result in serious genomic instability and genotoxicity by causing DNA damage. Carbon ion (CI) beams and X-rays are typical IRs and possess high-linear energy transfer (LET) and low-LET, respectively. In this article, a comet assay that was optimized by decreasing the electrophoresis time (8 minutes) and voltage (0.5 V/cm) was performed to elucidate and quantify the DNA damage induced by CI or X-rays radiation. Two quantitative methods for the comet assay, namely, comet score and olive tail moment, were compared, and the appropriate means and parameter values were selected for the present assay. The dose-effect relationship for CI or X-rays radiation and the DNA repair process were studied in yeast cells. These results showed that the quadratic function fitted the dose-effect relationship after CI or X-rays exposure, and the trend for the models fitted the dose-effect curves for various repair times was precisely described by the cubic function. A kinetics model was also creatively used to describe the process of DNA repair, and equations were calculated within repairable ranges that could be used to roughly evaluate the process and time necessary for DNA repair.
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Affiliation(s)
- Miaomiao Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China.,Key Laboratory of Microbial Resources Exploitation and Application, Lanzhou, China
| | - Guozhen Cao
- Department of Pharmacology, School of Preclinical Medicine of Xinjiang Medical University, Urumqi, China
| | - Xiaopeng Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Yue Gao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Wenjian Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Microbial Resources Exploitation and Application, Lanzhou, China
| | - Dong Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,Key Laboratory of Microbial Resources Exploitation and Application, Lanzhou, China
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14
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Wang H, Bouzakoura S, de Mey S, Jiang H, Law K, Dufait I, Corbet C, Verovski V, Gevaert T, Feron O, Van den Berge D, Storme G, De Ridder M. Auranofin radiosensitizes tumor cells through targeting thioredoxin reductase and resulting overproduction of reactive oxygen species. Oncotarget 2018; 8:35728-35742. [PMID: 28415723 PMCID: PMC5482612 DOI: 10.18632/oncotarget.16113] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 03/01/2017] [Indexed: 12/28/2022] Open
Abstract
Auranofin (AF) is an anti-arthritic drug considered for combined chemotherapy due to its ability to impair the redox homeostasis in tumor cells. In this study, we asked whether AF may in addition radiosensitize tumor cells by targeting thioredoxin reductase (TrxR), a critical enzyme in the antioxidant defense system operating through the reductive protein thioredoxin. Our principal findings in murine 4T1 and EMT6 tumor cells are that AF at 3-10 μM is a potent radiosensitizer in vitro, and that at least two mechanisms are involved in TrxR-mediated radiosensitization. The first one is linked to an oxidative stress, as scavenging of reactive oxygen species (ROS) by N-acetyl cysteine counteracted radiosensitization. We also observed a decrease in mitochondrial oxygen consumption with spared oxygen acting as a radiosensitizer under hypoxic conditions. Overall, radiosensitization was accompanied by ROS overproduction, mitochondrial dysfunction, DNA damage and apoptosis, a common mechanism underlying both cytotoxic and antitumor effects of AF. In tumor-bearing mice, a simultaneous disruption of the thioredoxin and glutathione systems by the combination of AF and buthionine sulfoximine was shown to significantly improve tumor radioresponse. In conclusion, our findings illuminate TrxR in cancer cells as an exploitable radiobiological target and warrant further validation of AF in combination with radiotherapy.
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Affiliation(s)
- Hui Wang
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Soumaya Bouzakoura
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Sven de Mey
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Heng Jiang
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Kalun Law
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Inès Dufait
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium.,Laboratory of Molecular and Cellular Therapy, Vrije Universiteit Brussel, Brussels, Belgium
| | - Cyril Corbet
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Valeri Verovski
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Thierry Gevaert
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Olivier Feron
- Pole of Pharmacology and Therapeutics (FATH), Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, Brussels, Belgium
| | - Dirk Van den Berge
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Guy Storme
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
| | - Mark De Ridder
- Department of Radiotherapy, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium
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15
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Griffin F, Marignol L. Therapeutic potential of melatonin for breast cancer radiation therapy patients. Int J Radiat Biol 2018. [PMID: 29521142 DOI: 10.1080/09553002.2018.1446227] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Melatonin is an endogenous hormone primarily known for its action on the circadian rhythms. But pre-clinical studies are reporting both its radioprotective and radiosensitizing properties, possibly mediated through an interaction between melatonin and the regulation of estrogens. Melatonin pre-treatment prior to ionizing radiation was associated with a decrease in cell proliferation and an increase in p53 mRNA expression, leading to an increase in the radiosensitivity of breast cancer cells. At the same time, a decrease in radiation-induced side effects was described in breast cancer patients and in rodent models. This review examines the potential for melatonin to improve the therapeutic outcomes of breast radiation therapy, specifically estrogen receptor positive patients. Evidence suggests that melatonin may offer a novel, non-toxic and cheap adjuvant therapy to improve the existing treatment modalities. But further research is required in the clinical setting before a clear understanding of its therapeutic benefits is determined.
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Affiliation(s)
- Fiona Griffin
- a Applied Radiation Therapy Trinity, Discipline of Radiation therapy , Trinity College Dublin , Dublin , Ireland
| | - Laure Marignol
- a Applied Radiation Therapy Trinity, Discipline of Radiation therapy , Trinity College Dublin , Dublin , Ireland
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16
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Fernandes AMM, Vilela PGF, Valera MC, Bolay C, Hiller KA, Schweikl H, Schmalz G. Effect of bleaching agent extracts on murine macrophages. Clin Oral Investig 2017; 22:1771-1781. [PMID: 29196947 DOI: 10.1007/s00784-017-2273-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 11/07/2017] [Indexed: 01/14/2023]
Abstract
OBJECTIVES The aim of this study was to evaluate the cytotoxicity and the influence of bleaching agents on immunologically cell surface antigens of murine macrophages in vitro. MATERIALS AND METHODS RAW 264.7 cells were exposed to bleaching gel extracts (40% hydrogen peroxide or 20% carbamide peroxide) and different H2O2 concentrations after 1 and 24-h exposure periods and 1-h exposure and 23-h recovery. Tests were performed with and without N-acetyl cysteine (NAC) and buthionine sulfoximine (BSO). Cell viability was determined by MTT assay. The expression of surface markers CD14, CD40, and CD54 with and without LPS stimulation was detected by flow cytometry, while the production of TNF-α was measured by ELISA. Statistical analysis was performed using the Mann-Whitney U test (α = 0.05). RESULTS Extracts of bleaching agents were cytotoxic for cells after a 1-h exposure; cells could not recover after 24 h. This effect can be mitigated by the antioxidant NAC and increased by BSO, an inhibitor of glutathione (GSH) synthesis. LPS stimulated expression of all surface markers and TNF-α production. Exposure to bleaching agent extracts and H2O2 leads to a reduction of TNF-α, CD14, and CD40 expression, while the expression of CD54 was upregulated at non-cytotoxic concentrations. Whereas NAC reduced this effect, it was increased in the presence of BSO. CONCLUSIONS Extracts of bleaching agents were irreversibly cytotoxic to macrophages after a 1-h exposure. Only the expression of CD54 was upregulated. The reactions are mediated by the non-enzymatic antioxidant GSH. CLINICAL RELEVANCE The addition of an antioxidant can downregulate unfavorable effects of dental bleaching.
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Affiliation(s)
- Aletéia M M Fernandes
- Department of Health Sciences, Endodontics Division, Nove de Julho University (UNINOVE), São Paulo, Brazil.,Department of Health Sciences, Anatomy and Pathology Division, Anhanguera University, Vergueiro, 235/249-Liberdade, São Paulo, SP, 01504-000, Brazil
| | - Polyana G F Vilela
- Department of Bioscience and Oral Diagnosis, Microbiology Division, São José dos Campos Dental School, State University of São Paulo, UNESP, Av. Eng. Francisco José Longo, 777-Jardim Sao Dimas, São José dos Campos, SP, 12245-000, Brazil
| | - Marcia C Valera
- Department of Restorative Dentistry, Endodontic Division, São José dos Campos Dental School, State University of São Paulo UNESP, Av. Eng. Francisco José Longo, 777-Jardim Sao Dimas, São José dos Campos, SP, 12245-000, Brazil
| | - Carola Bolay
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Karl Anton Hiller
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Helmut Schweikl
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany
| | - Gottfried Schmalz
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, University of Regensburg, Franz-Josef-Strauß-Allee 11, 93053, Regensburg, Germany. .,Department of Periodontology, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland.
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17
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Smith TA, Kirkpatrick DR, Smith S, Smith TK, Pearson T, Kailasam A, Herrmann KZ, Schubert J, Agrawal DK. Radioprotective agents to prevent cellular damage due to ionizing radiation. J Transl Med 2017; 15:232. [PMID: 29121966 PMCID: PMC5680756 DOI: 10.1186/s12967-017-1338-x] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/04/2017] [Indexed: 11/26/2022] Open
Abstract
Medical imaging has become a central component of patient care to ensure early and accurate diagnosis. Unfortunately, many imaging modalities use ionizing radiation to generate images. Ionizing radiation even in low doses can cause direct DNA damage and generate reactive oxygen species and free radicals, leading to DNA, protein, and lipid membrane damage. This cell damage can lead to apoptosis, necrosis, teratogenesis, or carcinogenesis. As many as 2% of cancers (and an associated 15,000 deaths annually) can be linked to computed tomography exposure alone. Radioprotective agents have been investigated using various models including cells, animals, and recently humans. The data suggest that radioprotective agents working through a variety of mechanisms have the potential to decrease free radical damage produced by ionizing radiation. Radioprotective agents may be useful as an adjunct to medical imaging to reduced patient morbidity and mortality due to ionizing radiation exposure. Some radioprotective agents can be found in high quantities in antioxidant rich foods, suggesting that a specific diet recommendation could be beneficial in radioprotection.
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Affiliation(s)
- Tyler A. Smith
- Department of Radiology, University of Utah, 30 North 1900 East #1A071, Salt Lake City, UT 84132 USA
| | - Daniel R. Kirkpatrick
- Department of Clinical & Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178 USA
| | - Sean Smith
- Department of Clinical & Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178 USA
| | - Trevor K. Smith
- Western University of the Pacific School of Medicine, CA Campus, 309 E. Second St, Pomona, CA 91766 USA
| | | | - Aparna Kailasam
- Department of Clinical & Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178 USA
| | | | - Johanna Schubert
- Department of Clinical & Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178 USA
| | - Devendra K. Agrawal
- Department of Clinical & Translational Science, Creighton University School of Medicine, CRISS II Room 510, 2500 California Plaza, Omaha, NE 68178 USA
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18
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Styllou P, Styllou M, Hickel R, Högg C, Reichl FX, Scherthan H. NAC ameliorates dental composite-induced DNA double-strand breaks and chromatin condensation. Dent Mater J 2017; 36:638-646. [PMID: 28747595 DOI: 10.4012/dmj.2016-316] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Released (co)monomers from dental composite components can induce DNA damage of which DNA double-strand breaks (DSBs) threaten genome integrity. Here, we tested whether the administration of the antioxidant N-acetylcysteine (NAC) is able to reduce the dental composite-induced DSBs in primary human gingiva fibroblasts. The dental composites Bis-GMA (bisphenol-A-glycerolate dimethacrylate), GMA (glycidyl methacrylate), HEMA (2-hydroxyethyl methacrylate) and TEGDMA (triethyleneglycol dimethacrylate) were found to induce co-localizing microscopic nuclear foci numbers of the DSB markers γ-H2AX and 53BP1 per cell in the order: GMA>Bis-GMA>TEGDMA>HEMA. Supplementation of (co)monomer-containing culture medium with NAC led to a significant reduction of resin-induced DSBs as well as to an amelioration of dental monomer-induced nuclear chromatin condensation in gingival fibroblasts. Thus, antioxidant treatment can reduce radical-induced chromatin and DNA damage and open avenues to mitigate genotoxic effects of dental composite compounds.
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Affiliation(s)
- Panorea Styllou
- Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich.,Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University of Munich
| | - Marianthi Styllou
- Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich.,Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University of Munich
| | - Reinhard Hickel
- Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich
| | - Christof Högg
- Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich.,Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University of Munich
| | - Franz Xaver Reichl
- Department of Operative/Restorative Dentistry, Periodontology and Pedodontics, Ludwig-Maximilians-University of Munich.,Walther-Straub-Institute of Pharmacology and Toxicology, Ludwig-Maximilians-University of Munich
| | - Harry Scherthan
- Bundeswehr Institute of Radiobiology affil. to the University of Ulm
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19
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Kurashige T, Shimamura M, Nagayama Y. Differences in quantification of DNA double-strand breaks assessed by 53BP1/γH2AX focus formation assays and the comet assay in mammalian cells treated with irradiation and N-acetyl-L-cysteine. JOURNAL OF RADIATION RESEARCH 2016; 57:312-7. [PMID: 26951077 PMCID: PMC4915540 DOI: 10.1093/jrr/rrw001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 12/21/2015] [Accepted: 12/26/2015] [Indexed: 05/21/2023]
Abstract
The biological effect of ionizing radiation (IR) on genomic DNA is thought to be either direct or indirect; the latter is mediated by IR induction of free radicals and reactive oxygen species (ROS). This study was designed to evaluate the effect of N-acetyl-L-cysteine (NAC), a well-known ROS-scavenging antioxidant, on IR induction of genotoxicity, cytotoxicity and ROS production in mammalian cells, and aimed to clarify the conflicting data in previous publications. Although we clearly demonstrate the beneficial effect of NAC on IR-induced genotoxicity and cytotoxicity (determined using the micronucleus assay and cell viability/clonogenic assays), the data on NAC's effect on DNA double-strand break (DSB) formation were inconsistent in different assays. Specifically, mitigation of IR-induced DSBs by NAC was readily detected by the neutral comet assay, but not by the γH2AX or 53BP1 focus assays. NAC is a glutathione precursor and exerts its effect after conversion to glutathione, and presumably it has its own biological activity. Assuming that the focus assay reflects the biological responses to DSBs (detection and repair), while the comet assay reflects the physical status of genomic DNA, our results indicate that the comet assay could readily detect the antioxidant effect of NAC on DSB formation. However, NAC's biological effect might affect the detection of DSB repair by the focus assays. Our data illustrate that multiple parameters should be carefully used to analyze DNA damage when studying potential candidates for radioprotective compounds.
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Affiliation(s)
- Tomomi Kurashige
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Mika Shimamura
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Yuji Nagayama
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
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20
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Shukla PK, Gangwar R, Manda B, Meena AS, Yadav N, Szabo E, Balogh A, Lee SC, Tigyi G, Rao R. Rapid disruption of intestinal epithelial tight junction and barrier dysfunction by ionizing radiation in mouse colon in vivo: protection by N-acetyl-l-cysteine. Am J Physiol Gastrointest Liver Physiol 2016; 310:G705-15. [PMID: 26822914 PMCID: PMC4867328 DOI: 10.1152/ajpgi.00314.2015] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 01/12/2016] [Indexed: 01/31/2023]
Abstract
The goals of this study were to evaluate the effects of ionizing radiation on apical junctions in colonic epithelium and mucosal barrier function in mice in vivo. Adult mice were subjected to total body irradiation (4 Gy) with or without N-acetyl-l-cysteine (NAC) feeding for 5 days before irradiation. At 2-24 h postirradiation, the integrity of colonic epithelial tight junctions (TJ), adherens junctions (AJ), and the actin cytoskeleton was assessed by immunofluorescence microscopy and immunoblot analysis of detergent-insoluble fractions for TJ and AJ proteins. The barrier function was evaluated by measuring vascular-to-luminal flux of fluorescein isothiocyanate (FITC)-inulin in vivo and luminal-to-mucosal flux in vitro. Oxidative stress was evaluated by measuring protein thiol oxidation. Confocal microscopy showed that radiation caused redistribution of occludin, zona occludens-1, claudin-3, E-cadherin, and β-catenin, as well as the actin cytoskeleton as early as 2 h postirradiation, and this effect was sustained for at least 24 h. Feeding NAC before irradiation blocked radiation-induced disruption of TJ, AJ, and the actin cytoskeleton. Radiation increased mucosal permeability to inulin in colon, which was blocked by NAC feeding. The level of reduced-protein thiols in colon was depleted by radiation with a concomitant increase in the level of oxidized-protein thiol. NAC feeding blocked the radiation-induced protein thiol oxidation. These data demonstrate that radiation rapidly disrupts TJ, AJ, and the actin cytoskeleton by an oxidative stress-dependent mechanism that can be prevented by NAC feeding.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - RadhaKrishna Rao
- Department of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
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21
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Faruk EM, Abd Elsalam Morsy S. Comparative study on the effect of N-acetyl-cysteine versus sulpiride on experimentally induced stress in ovary of albino rats. THE EGYPTIAN JOURNAL OF HISTOLOGY 2015; 38:756-765. [DOI: 10.1097/01.ehx.0000475203.36934.2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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22
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Overexpression of yeast thioredoxin TRX2 reduces p53-mediated cell death in yeast. Appl Microbiol Biotechnol 2015; 99:8619-28. [DOI: 10.1007/s00253-015-6886-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 07/22/2015] [Accepted: 07/25/2015] [Indexed: 01/08/2023]
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23
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Santos CL, Bobermin LD, Souza DG, Bellaver B, Bellaver G, Arús BA, Souza DO, Gonçalves CA, Quincozes-Santos A. Lipoic acid and N-acetylcysteine prevent ammonia-induced inflammatory response in C6 astroglial cells: The putative role of ERK and HO1 signaling pathways. Toxicol In Vitro 2015; 29:1350-7. [PMID: 26043815 DOI: 10.1016/j.tiv.2015.05.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 05/03/2015] [Accepted: 05/30/2015] [Indexed: 02/05/2023]
Abstract
Hyperammonemia induces significant changes in the central nervous system (CNS) in direct association with astroglial functions, such as oxidative damage, glutamatergic excitotoxicity, and impaired glutamine synthetase (GS) activity and pro-inflammatory cytokine release. Classically, lipoic acid (LA) and N-acetylcysteine (NAC) exhibit antioxidant and anti-inflammatory activities by increasing glutathione (GSH) biosynthesis and decreasing pro-inflammatory mediator levels in glial cells. Thus, we evaluated the protective effects of LA and NAC against ammonia cytotoxicity in C6 astroglial cells. Ammonia decreased GSH levels and increased cytokine release and NFκB transcriptional activation. LA and NAC prevented these effects by the modulation of ERK and HO1 pathways. Taken together, these observations show that LA and NAC prevent the ammonia-induced inflammatory response.
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Affiliation(s)
- Camila Leite Santos
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Débora Guerini Souza
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bruna Bellaver
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gabriela Bellaver
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bernardo Assein Arús
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Diogo Onofre Souza
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Carlos-Alberto Gonçalves
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - André Quincozes-Santos
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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24
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Maier I, Schiestl RH. Evidence from Animal Models: Is a Restricted or Conventional Intestinal Microbiota Composition Predisposing to Risk for High-LET Radiation Injury? Radiat Res 2015; 183:589-93. [PMID: 26010710 DOI: 10.1667/rr13837.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Intestinal microbiota affect cell responses to ionizing radiation at the molecular level and can be linked to the development of the immune system, controlled cell death or apoptosis. We have developed a microbiota mouse model and report here that high-linear energy transfer (LET) radiation induced the repair of chromosomal DNA lesions more efficiently in conventional than in restricted intestinal microbiota mice. Based on different phylotype densities after whole-body irradiation, bacterial indicator phylotypes were found to be more abundant in restricted in microbiota than in conventional microbiota. Genotoxic phenotypes of irradiated restricted and conventional microbiota mice were compared with ataxia telangiectasia-deficient restricted and conventional microbiota mice, respectively. Those indicator phylotypes, including Bacteroides (Gram-negative bacterium cTPY-13), Barnesiella intestinihominis and others, which were identified in nonirradiated restricted microbiota mice, increase in radiation-exposed conventional microbiota along with a reduction of persistent DNA double-strand breaks in blood lymphocytes. The dynamic change of phylotype abundances elucidated a feedback mechanism and effect of intestinal microbiota composition on the adaptive response to high-LET radiation. Several other bacterial phylotypes ( Helicobacter hepaticus , Helicobacter spp and others) were found to be more abundant in conventional than restricted microbiota. In this commentary, mouse models used in cancer research and radiotherapy for the study on the effects of intestinal microbiota composition on normal tissue radiation response are characterized and discussed. Highlights of this commentary: 1. Restricted microbiota phylotypes were correlated with persistent DNA double-strand breaks (DSBs) and were found to orchestrate onco-protective controlled cell death after radiation; 2. Restricted microbiota composition reduced proinflammatory extracellular-stimulated immune responses, but specifically increased anti-neoplastic cytolytic memory CD8(+) T cells by low taxonomic diversity and 3. DNA damage repair efficiency induced by a model of conventional microbiota most likely initiates an adaptive response to radiation through microbiota-induced intestinal sub-symptomatic inflammation.
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Affiliation(s)
- Irene Maier
- a Department of Environmental Health Sciences, Fielding School of Public Health, and
| | - Robert H Schiestl
- a Department of Environmental Health Sciences, Fielding School of Public Health, and.,b Department of Pathology, Geffen School of Medicine, University of California, Los Angeles, California
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25
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Brand M, Sommer M, Ellmann S, Wuest W, May MS, Eller A, Vogt S, Lell MM, Kuefner MA, Uder M. Influence of Different Antioxidants on X-Ray Induced DNA Double-Strand Breaks (DSBs) Using γ-H2AX Immunofluorescence Microscopy in a Preliminary Study. PLoS One 2015; 10:e0127142. [PMID: 25996998 PMCID: PMC4440758 DOI: 10.1371/journal.pone.0127142] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/13/2015] [Indexed: 11/19/2022] Open
Abstract
Background Radiation exposure occurs in X-ray guided interventional procedures or computed tomography (CT) and γ-H2AX-foci are recognized to represent DNA double-strand breaks (DSBs) as a biomarker for radiation induced damage. Antioxidants may reduce the induction of γ-H2AX-foci by binding free radicals. The aim of this study was to establish a dose-effect relationship and a time-effect relationship for the individual antioxidants on DSBs in human blood lymphocytes. Materials and Methods Blood samples from volunteers were irradiated with 10 mGy before and after pre-incubation with different antioxidants (zinc, trolox, lipoic acid, ß-carotene, selenium, vitamin E, vitamin C, N-acetyl-L-cysteine (NAC) and Q 10). Thereby, different pre-incubation times, concentrations and combinations of drugs were evaluated. For assessment of DSBs, lymphocytes were stained against the phosphorylated histone variant γ-H2AX. Results For zinc, trolox and lipoic acid regardless of concentration or pre-incubation time, no significant decrease of γ-H2AX-foci was found. However, ß-carotene (15%), selenium (14%), vitamin E (12%), vitamin C (25%), NAC (43%) and Q 10 (18%) led to a significant reduction of γ-H2AX-foci at a pre-incubation time of 1 hour. The combination of different antioxidants did not have an additive effect. Conclusion Antioxidants administered prior to irradiation demonstrated the potential to reduce γ-H2AX-foci in blood lymphocytes.
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Affiliation(s)
- Michael Brand
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
- * E-mail:
| | - Matthias Sommer
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Stephan Ellmann
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Wolfgang Wuest
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Matthias S. May
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Achim Eller
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Sabine Vogt
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Michael M. Lell
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Michael A. Kuefner
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
| | - Michael Uder
- Department of Radiology, University Hospital Erlangen-Nuremberg, Erlangen, Germany
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Marchetti DP, Donida B, da Rosa HT, Manini PR, Moura DJ, Saffi J, Deon M, Mescka CP, Coelho DM, Jardim LB, Vargas CR. Protective effect of antioxidants on DNA damage in leukocytes from X-linked adrenoleukodystrophy patients. Int J Dev Neurosci 2015; 43:8-15. [PMID: 25765338 DOI: 10.1016/j.ijdevneu.2015.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2015] [Revised: 03/06/2015] [Accepted: 03/06/2015] [Indexed: 10/23/2022] Open
Abstract
Toxic metabolites accumulation and oxidative stress have been associated to the pathophysiology of X-linked adrenoleukodystrophy (X-ALD), an inborn error of peroxisome metabolism. Parameters of oxidative damage to proteins and lipids in X-ALD patients were already described in literature; however, DNA injuries were not studied yet. Considering that, the aims were to investigate DNA damage by comet assay in heterozygotes and symptomatic X-ALD patients, to look for associations between DNA damage and lipid peroxidation as measured by urinary 15-F2t-isoprostane; and to evaluate the in vitro effect of N-acetyl-l-cysteine (NAC), trolox (TRO) and rosuvastatin (RSV) on DNA damage in leukocytes from symptomatic patients. Symptomatic patients presented higher DNA damage levels than those found in heterozygotes and controls; heterozygotes and controls showed similar results. In order to investigate the in vitro antioxidant effect on DNA damage, whole blood cells from symptomatic patients were incubated with NAC (1 and 2.5mM), TRO (25 and 75 μM) and RSV (0.5, 2 and 5 μM) before DNA damage analysis. NAC, TRO and RSV, at all tested concentrations, were all capable to reduce DNA damage in symptomatic X-ALD patients until control levels. Finally, DNA damage correlated with urinary isoprostanes and plasmatic levels of TBA-RS and DCFH-DA, allowing to hypothesize that DNA damage might be induced by lipid peroxidation in symptomatic patients. The present work yields experimental evidence that NAC, TRO and RSV reduce the in vitro DNA injury in symptomatic X-ALD patients, what may suggest that the administration of these antioxidants might be considered as an adjuvant therapy for X-ALD.
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Affiliation(s)
- Desirèe P Marchetti
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica, UFRGS, Rua Ramiro Barcelos, 2600, CEP 90035-003 Porto Alegre, RS, Brazil.
| | - Bruna Donida
- Programa de Pós-Graduação em Ciências Farmacêuticas, UFRGS, Av. Ipiranga, 2752, CEP 90610-000 Porto Alegre, RS, Brazil.
| | - Helen T da Rosa
- Universidade Federal de Ciências de Saúde de Porto Alegre, UFSPA, Rua Sarmento Leite, 245, CEP 90050170 Porto Alegre, RS, Brazil.
| | - Paula R Manini
- Universidade Federal de Ciências de Saúde de Porto Alegre, UFSPA, Rua Sarmento Leite, 245, CEP 90050170 Porto Alegre, RS, Brazil.
| | - Dinara J Moura
- Universidade Federal de Ciências de Saúde de Porto Alegre, UFSPA, Rua Sarmento Leite, 245, CEP 90050170 Porto Alegre, RS, Brazil.
| | - Jenifer Saffi
- Universidade Federal de Ciências de Saúde de Porto Alegre, UFSPA, Rua Sarmento Leite, 245, CEP 90050170 Porto Alegre, RS, Brazil.
| | - Marion Deon
- Programa de Pós-Graduação em Ciências Farmacêuticas, UFRGS, Av. Ipiranga, 2752, CEP 90610-000 Porto Alegre, RS, Brazil; Serviço de Genética Médica, HCPA, Rua Ramiro Barcelos, 2350, CEP 90035-003 Porto Alegre, RS, Brazil.
| | - Caroline P Mescka
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica, UFRGS, Rua Ramiro Barcelos, 2600, CEP 90035-003 Porto Alegre, RS, Brazil.
| | - Daniella M Coelho
- Serviço de Genética Médica, HCPA, Rua Ramiro Barcelos, 2350, CEP 90035-003 Porto Alegre, RS, Brazil.
| | - Laura B Jardim
- Serviço de Genética Médica, HCPA, Rua Ramiro Barcelos, 2350, CEP 90035-003 Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências Médicas, UFRGS, Rua Ramiro Barcelos, 2400, CEP 90035-003 Porto Alegre, RS, Brazil.
| | - Carmen R Vargas
- Programa de Pós-Graduação em Ciências Biológicas, Bioquímica, UFRGS, Rua Ramiro Barcelos, 2600, CEP 90035-003 Porto Alegre, RS, Brazil; Programa de Pós-Graduação em Ciências Farmacêuticas, UFRGS, Av. Ipiranga, 2752, CEP 90610-000 Porto Alegre, RS, Brazil; Serviço de Genética Médica, HCPA, Rua Ramiro Barcelos, 2350, CEP 90035-003 Porto Alegre, RS, Brazil.
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Weyemi U, Redon CE, Aziz T, Choudhuri R, Maeda D, Parekh PR, Bonner MY, Arbiser JL, Bonner WM. Inactivation of NADPH oxidases NOX4 and NOX5 protects human primary fibroblasts from ionizing radiation-induced DNA damage. Radiat Res 2015; 183:262-70. [PMID: 25706776 DOI: 10.1667/rr13799.1] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Human exposure to ionizing radiation from medical procedures has increased sharply in the last three decades. Recent epidemiological studies suggest a direct relationship between exposure to ionizing radiation and health problems, including cancer incidence. Therefore, minimizing the impact of radiation exposure in patients has become a priority in the development of future clinical practices. Crucial players in radiation-induced DNA damage include reactive oxygen species (ROS), but the sources of these have remained elusive. To the best of our knowledge, we show here for the first time that two members of the ROS-generating NADPH oxidase family (NOXs), NOX4 and NOX5, are involved in radiation-induced DNA damage. Depleting these two NOXs in human primary fibroblasts resulted in reduced levels of DNA damage as measured by levels of radiation-induced foci, a marker of DNA double-strand breaks (DSBs) and the comet assay coupled with increased cell survival. NOX involvement was substantiated with fulvene-5, a NOXs-specific inhibitor. Moreover, fulvene-5 mitigated radiation-induced DNA damage in human peripheral blood mononuclear cells ex vivo. Our results provide evidence that the inactivation of NOXs protects cells from radiation-induced DNA damage and cell death. These findings suggest that NOXs inhibition may be considered as a future pharmacological target to help minimize the negative effects of radiation exposure for millions of patients each year.
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Affiliation(s)
- Urbain Weyemi
- a Laboratory of Molecular Pharmacology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
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Kuefner MA, Brand M, Andreassi MG, Braga L, Uder M. Chemoprevention of Radiation-Induced DNA Double-Strand Breaks with Antioxidants. CURRENT RADIOLOGY REPORTS 2015. [DOI: 10.1007/s40134-014-0081-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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29
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Antioxidants Prevent DNA Double-Strand Breaks From X-Ray–Based Cardiac Examinations. J Am Coll Cardiol 2014; 64:117-8. [DOI: 10.1016/j.jacc.2014.04.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 03/25/2014] [Accepted: 04/05/2014] [Indexed: 11/23/2022]
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30
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Kovvuru P, Mancilla PE, Shirode AB, Murray TM, Begley TJ, Reliene R. Oral ingestion of silver nanoparticles induces genomic instability and DNA damage in multiple tissues. Nanotoxicology 2014; 9:162-71. [DOI: 10.3109/17435390.2014.902520] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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31
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Martin NT, Nakamura K, Paila U, Woo J, Brown C, Wright JA, Teraoka SN, Haghayegh S, McCurdy D, Schneider M, Hu H, Quinlan AR, Gatti RA, Concannon P. Homozygous mutation of MTPAP causes cellular radiosensitivity and persistent DNA double-strand breaks. Cell Death Dis 2014; 5:e1130. [PMID: 24651433 PMCID: PMC3973239 DOI: 10.1038/cddis.2014.99] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/29/2014] [Accepted: 02/03/2014] [Indexed: 02/03/2023]
Abstract
The study of rare human syndromes characterized by radiosensitivity has been instrumental in identifying novel proteins and pathways involved in DNA damage responses to ionizing radiation. In the present study, a mutation in mitochondrial poly-A-polymerase (MTPAP), not previously recognized for its role in the DNA damage response, was identified by exome sequencing and subsequently associated with cellular radiosensitivity. Cell lines derived from two patients with the homozygous MTPAP missense mutation were radiosensitive, and this radiosensitivity could be abrogated by transfection of wild-type mtPAP cDNA into mtPAP-deficient cell lines. Further analysis of the cellular phenotype revealed delayed DNA repair, increased levels of DNA double-strand breaks, increased reactive oxygen species (ROS), and increased cell death after irradiation (IR). Pre-IR treatment of cells with the potent anti-oxidants, α-lipoic acid and n-acetylcysteine, was sufficient to abrogate the DNA repair and clonogenic survival defects. Our results firmly establish that mutation of the MTPAP gene results in a cellular phenotype of increased DNA damage, reduced repair kinetics, increased cell death by apoptosis, and reduced clonogenic survival after exposure to ionizing radiation, suggesting a pathogenesis that involves the disruption of ROS homeostasis.
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Affiliation(s)
- N T Martin
- 1] UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA [2] UCLA Biomedical Physics Interdepartmental Graduate Program, Los Angeles, CA, USA
| | - K Nakamura
- UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA
| | - U Paila
- Department of Public Health Sciences, Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
| | - J Woo
- UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA
| | - C Brown
- UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA
| | - J A Wright
- Genetics Institute, University of Florida, Gainesville, FL, USA
| | - S N Teraoka
- Genetics Institute, University of Florida, Gainesville, FL, USA
| | - S Haghayegh
- UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA
| | - D McCurdy
- UCLA Department of Pediatrics, Los Angeles, CA, USA
| | | | - H Hu
- UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA
| | - A R Quinlan
- Department of Public Health Sciences, Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
| | - R A Gatti
- 1] UCLA Department of Pathology and Laboratory Medicine, MacDonald Research Laboratories, Los Angeles, CA, USA [2] UCLA Biomedical Physics Interdepartmental Graduate Program, Los Angeles, CA, USA [3] UCLA Department of Human Genetics, Los Angeles, CA, USA
| | - P Concannon
- 1] Genetics Institute, University of Florida, Gainesville, FL, USA [2] Department of Pathology, Immunology and Laboratory Medicine, University of Florida, Gainesville, FL, USA
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Kim JK, Park J, Ryu TH, Nili M. Effect of N-acetyl-l-cysteine on Saccharomyces cerevisiae irradiated with gamma-rays. CHEMOSPHERE 2013; 92:512-516. [PMID: 23623538 DOI: 10.1016/j.chemosphere.2013.02.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 02/05/2013] [Accepted: 02/17/2013] [Indexed: 06/02/2023]
Abstract
Ionizing radiation (IR) induces DNA strand breaks (DSBs), base damage, inhibition of protein activity, apoptosis by reactive oxygen species (ROS). Detoxification or removal of generated ROS can reduce oxidative damage. Antioxidant enzymes such as superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase are immediately triggered for ROS scavenging. N-acetyl-l-cysteine (NAC) having a thiol, a precursor for reduced glutathione (GSH), is known as one of the antioxidants. In this study, the effect of NAC as an antioxidant and a radioprotector was investigated on survival rate, transcriptional level of antioxidant enzymes gene, and protein level including SOD activity and intracellular GSH in yeast Saccharomyces cerevisiae W303-1A strain mutated YBP1 gene irradiated with gamma-rays. NAC did not protect the gamma-ray-induced cell death. The gene expression of antioxidant enzymes including SOD1, SOD2, GPX1, and GPX2 was induced by gamma-rays. In contrast, the pretreatment of NAC reduced the expression of these genes. NAC reduced SOD activity and intracellular GSH level in yeast. These data suggest that NAC is able to reduce radiation-induced ROS levels in vivo but does not protect yeast cells against radiation-induced death.
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Affiliation(s)
- Jin Kyu Kim
- Korea Atomic Energy Research Institute, Advanced Radiation Technology Institute, Jeongeup 580-185, South Korea.
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Effect of N-acetyl cysteine on enterocyte apoptosis and intracellular signalling pathways' response to oxidative stress in weaned piglets. Br J Nutr 2013; 110:1938-47. [DOI: 10.1017/s0007114513001608] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
N-acetyl cysteine (NAC) has been widely used for preventing reactive oxygen species-induced damage. However, little is known as to whether dietary NAC supplementation would alleviate intestinal injury in weaned piglets. The present study evaluated the effect of NAC on enterocyte apoptosis and intracellular signalling pathways' response to weaning stress. The control piglets were normally suckling, and piglets in the weaning and NAC groups were fed the basal diet and basal+NAC diet from 14 to 25 d of age, respectively. Compared with the control piglets, weaning increased cortisol concentrations (P< 0·05), decreased superoxide dismutase and glutathione peroxidase activities (P< 0·05), increased malondialdehyde content (P< 0·05) in serum and enhanced enterocyte apoptosis index (AI) and concentrations of caspase-3, caspase-8 and caspase-9 (P< 0·05). Gene expression analyses indicated that weaning induced apoptosis via Fas signalling and mitochondrial pathways in weaned piglets. Dietary NAC supplementation decreased (P< 0·05) cortisol concentrations and the AI, increased (P< 0·05) antioxidant status in serum and alleviated histopathological changes in the intestine. It also inhibited Fas, caspase-3, caspase-8 and integrin αvβ6 (αvβ6) gene expressions in the NAC-treated piglets. However, no significant decrease (P>0·10) in caspase-3, caspase-8 and caspase-9 concentrations was observed in the NAC group compared with the weaning group. In conclusion, weaning may induce enterocyte apoptosis via the activation of Fas-dependent and mitochondria-dependent apoptosis. Although NAC had no effect on caspase concentrations, it was clearly beneficial for preserving morphological integrity in weaned piglets via the regulation of cell apoptosis and the inhibition of Fas-dependent apoptosis and αvβ6 expression.
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Samuni Y, Goldstein S, Dean OM, Berk M. The chemistry and biological activities of N-acetylcysteine. Biochim Biophys Acta Gen Subj 2013; 1830:4117-29. [PMID: 23618697 DOI: 10.1016/j.bbagen.2013.04.016] [Citation(s) in RCA: 544] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2013] [Revised: 04/11/2013] [Accepted: 04/15/2013] [Indexed: 12/15/2022]
Abstract
BACKGROUND N-acetylcysteine (NAC) has been in clinical practice for several decades. It has been used as a mucolytic agent and for the treatment of numerous disorders including paracetamol intoxication, doxorubicin cardiotoxicity, ischemia-reperfusion cardiac injury, acute respiratory distress syndrome, bronchitis, chemotherapy-induced toxicity, HIV/AIDS, heavy metal toxicity and psychiatric disorders. SCOPE OF REVIEW The mechanisms underlying the therapeutic and clinical applications of NAC are complex and still unclear. The present review is focused on the chemistry of NAC and its interactions and functions at the organ, tissue and cellular levels in an attempt to bridge the gap between its recognized biological activities and chemistry. MAJOR CONCLUSIONS The antioxidative activity of NAC as of other thiols can be attributed to its fast reactions with OH, NO2, CO3(-) and thiyl radicals as well as to restitution of impaired targets in vital cellular components. NAC reacts relatively slowly with superoxide, hydrogen-peroxide and peroxynitrite, which cast some doubt on the importance of these reactions under physiological conditions. The uniqueness of NAC is most probably due to efficient reduction of disulfide bonds in proteins thus altering their structures and disrupting their ligand bonding, competition with larger reducing molecules in sterically less accessible spaces, and serving as a precursor of cysteine for GSH synthesis. GENERAL SIGNIFICANCE The outlined reactions only partially explain the diverse biological effects of NAC, and further studies are required for determining its ability to cross the cell membrane and the blood-brain barrier as well as elucidating its reactions with components of cell signaling pathways.
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Aldbass AM, Bhat RS, El-Ansary A. Protective and therapeutic potency of N-acetyl-cysteine on propionic acid-induced biochemical autistic features in rats. J Neuroinflammation 2013; 10:42. [PMID: 23537042 PMCID: PMC3680076 DOI: 10.1186/1742-2094-10-42] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 03/12/2013] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND The investigation of the environmental contribution for developmental neurotoxicity is very critical. Many environmental chemical exposures are now thought to contribute to the development of neurological disorders, especially in children. Results from animal studies may guide investigations of human populations towards identifying either environmental toxicants that cause or drugs that protect from neurotoxicity and may help in treatment of neurodevelopmental disorders. OBJECTIVE To study both the protective and therapeutic effects of N-acetyl cysteine on brain intoxication induced by propionic acid (PPA) in rats. METHODS Twenty-eight young male Western Albino rats were enrolled in the present study. They were grouped into four equal groups, each of 7 animals. Group 1: control group, orally received only phosphate buffered saline; Group 2: PPA-treated group, received a neurotoxic dose of of PPA of 250 mg/kg body weight/day for 3 days; Group 3: protective group, received a dose of 50 mg/kg body weight/day N-acetyl-cysteine for one week followed by a similar dose of PPA for 3 days; and Group 4: therapeutic group, treated with the same dose of N-acetyl cysteine after being treated with the toxic dose of PPA. Serotonin, interferon gamma (IFN-γ), and glutathione-s-transferase activity, together with Comet DNA were assayed in the brain tissue of rats in all different groups. RESULTS The obtained data showed that PPA caused multiple signs of brain toxicity as measured by depletion of serotonin (5HT), increase in IFN-γ and inhibition of glutathione-s-transferase activity as three biomarkers of brain dysfunction. Additionally Comet DNA assay showed remarkably higher tail length, tail DNA % damage and tail moment. N-acetyl-cysteine was effective in counteracting the neurotoxic effects of PPA. CONCLUSIONS The low dose and the short duration of N-acetyl-cysteine treatment tested in the present study showed much more protective rather than therapeutic effects on PPA-induced neurotoxicity in rats, as there was a remarkable amelioration in the impaired biochemical parameters representing neurochemical, inflammatory, detoxification and DNA damage processes.
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Crystal structures of complexes of the branched-chain aminotransferase from Deinococcus radiodurans with α-ketoisocaproate and L-glutamate suggest the radiation resistance of this enzyme for catalysis. J Bacteriol 2012; 194:6206-16. [PMID: 22984263 DOI: 10.1128/jb.01659-12] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Branched-chain aminotransferases (BCAT), which utilize pyridoxal 5'-phosphate (PLP) as a cofactor, reversibly catalyze the transfer of the α-amino groups of three of the most hydrophobic branched-chain amino acids (BCAA), leucine, isoleucine, and valine, to α-ketoglutarate to form the respective branched-chain α-keto acids and glutamate. The BCAT from Deinococcus radiodurans (DrBCAT), an extremophile, was cloned and expressed in Escherichia coli for structure and functional studies. The crystal structures of the native DrBCAT with PLP and its complexes with L-glutamate and α-ketoisocaproate (KIC), respectively, have been determined. The DrBCAT monomer, comprising 358 amino acids, contains large and small domains connected with an interdomain loop. The cofactor PLP is located at the bottom of the active site pocket between two domains and near the dimer interface. The substrate (L-glutamate or KIC) is bound with key residues through interactions of the hydrogen bond and the salt bridge near PLP inside the active site pocket. Mutations of some interaction residues, such as Tyr71, Arg145, and Lys202, result in loss of the specific activity of the enzymes. In the interdomain loop, a dynamic loop (Gly173 to Gly179) clearly exhibits open and close conformations in structures of DrBCAT without and with substrates, respectively. DrBCAT shows the highest specific activity both in nature and under ionizing radiation, but with lower thermal stability above 60 °C, than either BCAT from Escherichia coli (eBCAT) or from Thermus thermophilus (HB8BCAT). The dimeric molecular packing and the distribution of cysteine residues at the active site and the molecular surface might explain the resistance to radiation but small thermal stability of DrBCAT.
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Kuefner MA, Brand M, Ehrlich J, Braga L, Uder M, Semelka RC. Effect of antioxidants on X-ray-induced γ-H2AX foci in human blood lymphocytes: preliminary observations. Radiology 2012; 264:59-67. [PMID: 22509049 DOI: 10.1148/radiol.12111730] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To investigate the effect of a radioprotective oral agent containing a formulation of antioxidants and glutathione-elevating compounds on the extent of x-ray-induced γ-H2AX foci formation. MATERIALS AND METHODS The study was approved by local ethics committee and informed consent was obtained from each subject. In vitro experiments with blood lymphocytes of 25 healthy volunteers were performed without antioxidants and with antioxidants added either before or immediately after irradiation (10 mGy). For in vivo/in vitro tests, blood samples were obtained before, 15, 30, and 60 minutes (n=17) after, and 2, 3, and 5 hours (n=11) after oral ingestion of antioxidant pills and were irradiated (10 mGy). DNA double-strand breaks (DSBs) were quantified in isolated lymphocytes 5 minutes (in vitro and in vivo/in vitro) and 15 minutes (in vitro) after irradiation by enumerating γ-H2AX foci. To validate the data, additional in vitro experiments with use of 53BP1 as another independent marker for DSBs were performed. Nonirradiated samples served as controls. Statistical analyses were performed by using Wilcoxon rank-sum tests (in vitro), repeated-measures test, and Dunnett test (in vivo/in vitro). RESULTS In the in vitro experiments, 15-minute preincubation with antioxidants significantly reduced mean γ-H2AX foci levels by 23% (P<.0001), whereas addition of antioxidants immediately after irradiation did not lead to a reduction of x-ray-induced foci (P=.6905). Mean 53BP1 foci were also reduced by preincubation with the radioprotectant. In the in vivo/in vitro tests, oral pretreatment with antioxidants also led to a significant reduction of γ-H2AX foci formation; administration 60 minutes before irradiation resulted in a mean foci reduction of 58% (P<.0001). CONCLUSION The tested formulation of antioxidants significantly reduced formation of γ-H2AX and 53BP1 foci after irradiation at a radiologic radiation dose typical for computed tomographic imaging; administration 60 minutes prior to irradiation seems to be appropriate and leads to a significant reduction in foci.
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Affiliation(s)
- Michael A Kuefner
- Department of Radiology, University of Erlangen-Nürnberg, Maximiliansplatz 1, D-91054 Erlangen, Germany.
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Liu J, Liu M, Ye X, Liu K, Huang J, Wang L, Ji G, Liu N, Tang X, Baltz JM, Keefe DL, Liu L. Delay in oocyte aging in mice by the antioxidant N-acetyl-L-cysteine (NAC). Hum Reprod 2012; 27:1411-20. [PMID: 22357770 DOI: 10.1093/humrep/des019] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Ovarian aging is associated with declining numbers and quality of oocytes and follicles. Oxidative stress by reactive oxygen species (ROS) contributes to somatic aging in general, and also has been implicated in reproductive aging. Telomere shortening is also involved in aging, and telomeres are particularly susceptible to ROS-induced damage. Previously, we have shown that antioxidant N-acetyl-L-cysteine (NAC) effectively rescues oocytes and embryos from ROS-induced telomere shortening and apoptosis in vitro. Using mice as models, we tested the hypothesis that reducing oxidative stress by NAC might prevent or delay ovarian aging in vivo. METHODS Initially, young females were treated with NAC in drinking water for 2 months and the quality of fertilized oocytes and early embryo development were evaluated. Next, young mice 1-1½ months old were treated for 1 year with NAC added in drinking water, and their fertility was analyzed starting at 6 months, as indicated by litter size, oocyte number and quality. The ovaries were also examined for telomere activity and length and the expression of selected genes related to aging and DNA damage. RESULTS Short-term treatment of mice for 2 months with NAC demonstrated that NAC improved the quality of fertilized oocytes and early embryo development. Mice treated with a long-term low concentration (0.1 mM) of NAC had increased litter sizes at the ages of 7-10 months compared with age-matched controls without NAC treatment. NAC also increased the quality of the oocytes from these older mice. Moreover, the expression of sirtuins was increased, telomerase activity was higher and telomere length was longer in the ovaries of mice treated with NAC compared with those of the control group. CONCLUSIONS These data suggest that appropriate treatment with the antioxidant NAC postpones the process of oocyte aging in mice.
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Affiliation(s)
- Jinmiao Liu
- Department of Cell Biology and Genetics, College of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, Nankai University, Tianjin 300071, China
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Andreassi MG, Cioppa A, Manfredi S, Neri MG, Foffa I, Picano E. N-acetyl cysteine reduces chromosomal DNA damage in circulating lymphocytes during cardiac catheterization procedures: a pilot study. Int J Cardiol 2011; 161:93-6. [PMID: 21605919 DOI: 10.1016/j.ijcard.2011.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 11/29/2010] [Accepted: 05/02/2011] [Indexed: 11/17/2022]
Abstract
BACKGROUND N-acetylcysteine (NAC) is considered a promising radio-protector for its antioxidant and anticarcinogenic properties. We examined the ability of NAC to confer protection against radiation-induced chromosomal DNA damage during cardiac catheterization procedures. METHODS Sixty-five patients (52 males, age 64.4 ± 11.9 years) undergoing invasive cardiovascular procedures (peripheral transluminal angioplasty, n=45; cardiac resynchronization therapy, n=15 and ablation therapy n=5) were enrolled: 35 patients (26 males, age 63.4 ± 11.1 years) received the standard hydration protocol consisting of intravenous isotonic saline for 12h after catheterization (Group I), and 30 patients (26 males, age 65.5 ± 12.9 years) received a clinically driven double intravenous dose of NAC (6 mg/kg/h diluted in 250 mL of NaCl 0.9%) for 1h before and a standard dose (6 mg/kg/h diluted in 500 mL of NaCl 0.9%) for 12h following catheterization (Group II). Micronucleus assay (MN) was performed as biomarker of chromosomal DNA damage before, 2 and 24h after the radiation exposure. Dose-area product (DAP; Gy cm(2)) was assessed as physical measure of radiation load. RESULTS DAP was higher in NAC-treated patients (I=54.7 ± 23.6 vs II=126.2 ± 79.2 Gy cm(2), p=0.0001). MN frequency was 13.7 ± 4.7 ‰ at baseline and showed a significant rise at 2h (18.0 ± 6.8 p=0.01) and 24h (17.6 ± 5.9, p=0.03) in the Group I. There was no significant increase of MN in the Group II (13.7 ± 7.0, 15.5 ± 6.0 and 14.9 ± 6.3 for baseline, 2h and 24h respectively, p=0.4). CONCLUSION NAC treatment given to prevent contrast-induced nephropathy may also reduce DNA damage induced by ionizing radiation exposure during cardiac catheterization procedures.
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Current awareness on yeast. Yeast 2009. [DOI: 10.1002/yea.1627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Trouiller B, Reliene R, Westbrook A, Solaimani P, Schiestl RH. Titanium dioxide nanoparticles induce DNA damage and genetic instability in vivo in mice. Cancer Res 2009; 69:8784-9. [PMID: 19887611 DOI: 10.1158/0008-5472.can-09-2496] [Citation(s) in RCA: 474] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Titanium dioxide (TiO(2)) nanoparticles are manufactured worldwide in large quantities for use in a wide range of applications including pigment and cosmetic manufacturing. Although TiO(2) is chemically inert, TiO(2) nanoparticles can cause negative health effects, such as respiratory tract cancer in rats. However, the mechanisms involved in TiO(2)-induced genotoxicity and carcinogenicity have not been clearly defined and are poorly studied in vivo. The present study investigates TiO(2) nanoparticles-induced genotoxicity, oxidative DNA damage, and inflammation in a mice model. We treated wild-type mice with TiO(2) nanoparticles in drinking water and determined the extent of DNA damage using the comet assay, the micronuclei assay, and the gamma-H2AX immunostaining assay and by measuring 8-hydroxy-2'-deoxyguanosine levels and, as a genetic instability endpoint, DNA deletions. We also determined mRNA levels of inflammatory cytokines in the peripheral blood. Our results show that TiO(2) nanoparticles induced 8-hydroxy-2'-deoxyguanosine, gamma-H2AX foci, micronuclei, and DNA deletions. The formation of gamma-H2AX foci, indicative of DNA double-strand breaks, was the most sensitive parameter. Inflammation was also present as characterized by a moderate inflammatory response. Together, these results describe the first comprehensive study of TiO(2) nanoparticles-induced genotoxicity in vivo in mice possibly caused by a secondary genotoxic mechanism associated with inflammation and/or oxidative stress. Given the growing use of TiO(2) nanoparticles, these findings raise concern about potential health hazards associated with TiO(2) nanoparticles exposure.
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Affiliation(s)
- Benedicte Trouiller
- Department of Pathology and Laboratory Medicine, Center for Human Nutrition, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, California 90095, USA
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