1
|
Indo HP, Tomiyoshi T, Suenaga S, Tomita K, Suzuki H, Masuda D, Terada M, Ishioka N, Gusev O, Cornette R, Okuda T, Mukai C, Majima HJ. MnSOD downregulation induced by extremely low 0.1 mGy single and fractionated X-rays and microgravity treatment in human neuroblastoma cell line, NB-1. J Clin Biochem Nutr 2015; 57:98-104. [PMID: 26388666 PMCID: PMC4566025 DOI: 10.3164/jcbn.15-20] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 02/16/2015] [Indexed: 11/22/2022] Open
Abstract
A human neuroblastoma cell line, NB-1, was treated with 24 h of microgravity simulation by clinostat, or irradiated with extremely small X-ray doses of 0.1 or 1.0 mGy using single and 10 times fractionation regimes with 1 and 2 h time-intervals. A quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) examination was performed for apoptosis related factors (BAX, CYTC, APAF1, VDAC1–3, CASP3, CASP8, CASP9 P53, AIF, ANT1 and 2, BCL2, MnSOD, autophagy related BECN and necrosis related CYP-40. The qRT-PCR results revealed that microgravity did not result in significant changes except for a upregulation of proapoptotic VDAC2, and downregulations of proapoptotic CASP9 and antiapoptotic MnSOD. After 0.1 mGy fractionation irradiation, there was increased expression of proapoptotic APAF1 and downregulation of proapoptotic CYTC, VDAC2, VDAC3, CASP8, AIF, ANT1, and ANT2, as well as an increase in expression of antiapoptotic BCL2. There was also a decrease in MnSOD expression with 0.1 mGy fractionation irradiation. These results suggest that microgravity and low-dose radiation may decrease apoptosis but may potentially increase oxidative stress.
Collapse
Affiliation(s)
- Hiroko P Indo
- Department of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan
| | - Tsukasa Tomiyoshi
- Department of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan
| | - Shigeaki Suenaga
- Department of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan
| | - Kazuo Tomita
- Department of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan
| | - Hiromi Suzuki
- Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan ; Life Science Research Group, Department of Science and Applications, Japan Space Forum, 3-2-1 Surugadai, Chiyoda, Tokyo 100-0004, Japan
| | - Daisuke Masuda
- Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan ; Utilization & Engineering Department, Japan Manned Space Systems Corporation, 2-1-6 Tsukuba, Ibaraki 305-0047, Japan
| | - Masahiro Terada
- Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan ; Space Biosciences Division, NASA Ames Research Center, Moffett Field, California 94035, USA
| | - Noriaki Ishioka
- Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan ; Department of Space Biology and Microgravity Sciences, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan
| | - Oleg Gusev
- Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan ; Department of Space Biology and Microgravity Sciences, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan ; Department of Invertebrates Zoology and Functional Morphology, Institute of Fundamental Medicine and Biology, Kazan Federal University 420008, Kremevskaya str., 17 Kazan 420-008, Russia ; Anhydrobiosis Research Unit, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Richard Cornette
- Anhydrobiosis Research Unit, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Takashi Okuda
- Anhydrobiosis Research Unit, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Chiaki Mukai
- Center for Applied Space Medicine and Human Research, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki 305-8505, Japan
| | - Hideyuki J Majima
- Department of Oncology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan ; Department of Space Environmental Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| |
Collapse
|
2
|
Chaudhary MW, Al-Baradie RS. Ataxia-telangiectasia: future prospects. APPLICATION OF CLINICAL GENETICS 2014; 7:159-67. [PMID: 25258552 PMCID: PMC4173637 DOI: 10.2147/tacg.s35759] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Ataxia-telangiectasia (A-T) is an autosomal recessive multi-system disorder caused by mutation in the ataxia-telangiectasia mutated gene (ATM). ATM is a large serine/threonine protein kinase, a member of the phosphoinositide 3-kinase-related protein kinase (PIKK) family whose best-studied function is as master controller of signal transduction for the DNA damage response (DDR) in the event of double strand breaks (DSBs). The DDR rapidly recognizes DNA lesions and initiates the appropriate cellular programs to maintain genome integrity. This includes the coordination of cell-cycle checkpoints, transcription, translation, DNA repair, metabolism, and cell fate decisions, such as apoptosis or senescence. DSBs can be generated by exposure to ionizing radiation (IR) or various chemical compounds, such as topoisomerase inhibitors, or can be part of programmed generation and repair of DSBs via cellular enzymes needed for the generation of the antibody repertoire as well as the maturation of germ cells. AT patients have immunodeficiency, and are sterile with gonadal dysgenesis as a result of defect in meiotic recombination. In the cells of nervous system ATM has additional role in vesicle dynamics as well as in the maintenance of the epigenetic code of histone modifications. Moderate levels of ATM are associated with prolonged lifespan through resistance to oxidative stress. ATM inhibitors are being viewed as potential radiosensitizers as part of cancer radiotherapy. Though there is no cure for the disease at present, glucocorticoids have been shown to induce alternate splicing site in the gene for ATM partly restoring its activity, but their most effective timing in the disease natural history is not yet known. Gene therapy is promising but large size of the gene makes it technically difficult to be delivered across the blood-brain barrier at present. As of now, apart from glucocorticoids, use of histone deacetylase inhibitors/EZH2 to minimize effect of the absence of ATM, looks more promising.
Collapse
Affiliation(s)
- Mohammed Wajid Chaudhary
- Pediatric Neurology, Neurosciences Centre, King Fahad Specialist Hospital, Dammam, Kingdom of Saudi Arabia
| | - Raidah Saleem Al-Baradie
- Pediatric Neurology, Neurosciences Centre, King Fahad Specialist Hospital, Dammam, Kingdom of Saudi Arabia
| |
Collapse
|
3
|
Pereira S, Malard V, Ravanat JL, Davin AH, Armengaud J, Foray N, Adam-Guillermin C. Low doses of gamma-irradiation induce an early bystander effect in zebrafish cells which is sufficient to radioprotect cells. PLoS One 2014; 9:e92974. [PMID: 24667817 PMCID: PMC3965492 DOI: 10.1371/journal.pone.0092974] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Accepted: 02/27/2014] [Indexed: 11/18/2022] Open
Abstract
The term “bystander effect” is used to describe an effect in which cells that have not been exposed to radiation are affected by irradiated cells though various intracellular signaling mechanisms. In this study we analyzed the kinetics and mechanisms of bystander effect and radioadaptation in embryonic zebrafish cells (ZF4) exposed to chronic low dose of gamma rays. ZF4 cells were irradiated for 4 hours with total doses of gamma irradiation ranging from 0.01–0.1 Gy. In two experimental conditions, the transfer of irradiated cells or culture medium from irradiated cells results in the occurrence of DNA double strand breaks in non-irradiated cells (assessed by the number of γ-H2AX foci) that are repaired at 24 hours post-irradiation whatever the dose. At low total irradiation doses the bystander effect observed does not affect DNA repair mechanisms in targeted and bystander cells. An increase in global methylation of ZF4 cells was observed in irradiated cells and bystander cells compared to control cells. We observed that pre-irradiated cells which are then irradiated for a second time with the same doses contained significantly less γ-H2AX foci than in 24 h gamma-irradiated control cells. We also showed that bystander cells that have been in contact with the pre-irradiated cells and then irradiated alone present less γ-H2AX foci compared to the control cells. This radioadaptation effect is significantly more pronounced at the highest doses. To determine the factors involved in the early events of the bystander effect, we performed an extensive comparative proteomic study of the ZF4 secretomes upon irradiation. In the experimental conditions assayed here, we showed that the early events of bystander effect are probably not due to the secretion of specific proteins neither the oxidation of these secreted proteins. These results suggest that early bystander effect may be due probably to a combination of multiple factors.
Collapse
Affiliation(s)
- Sandrine Pereira
- Institut de Radioprotection et de Sûreté Nucléaire, PRP-Environnement/SERIS, Laboratoire d’Ecotoxicologie des Radionucléides, Cadarache, St Paul Lez Durance, France
- CRCL - UMR INSERM 1052 - CNRS 5286, Equipe de Radiobiologie, Cheney A- 1éme étage, Lyon, France
- * E-mail:
| | - Véronique Malard
- CEA, DSV, IBEB, Lab Biochim System Perturb, Bagnols-sur-Cèze, France
| | - Jean-Luc Ravanat
- Laboratoire des Lésions des Acides Nucléiques, INAC/Scib UMR E3 CEA-UJF, CEA Grenoble, Grenoble, France
| | - Anne-Hélène Davin
- CEA, DSV, IBEB, Lab Biochim System Perturb, Bagnols-sur-Cèze, France
| | - Jean Armengaud
- CEA, DSV, IBEB, Lab Biochim System Perturb, Bagnols-sur-Cèze, France
| | - Nicolas Foray
- CRCL - UMR INSERM 1052 - CNRS 5286, Equipe de Radiobiologie, Cheney A- 1éme étage, Lyon, France
| | - Christelle Adam-Guillermin
- Institut de Radioprotection et de Sûreté Nucléaire, PRP-Environnement/SERIS, Laboratoire d’Ecotoxicologie des Radionucléides, Cadarache, St Paul Lez Durance, France
| |
Collapse
|
4
|
Greenbaum MP, Iwamori T, Buchold GM, Matzuk MM. Germ cell intercellular bridges. Cold Spring Harb Perspect Biol 2011; 3:a005850. [PMID: 21669984 DOI: 10.1101/cshperspect.a005850] [Citation(s) in RCA: 156] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Stable intercellular bridges are a conserved feature of gametogenesis in multicellular animals observed more than 100 years ago, but their function was unknown. Many of the components necessary for this structure have been identified through the study of cytokinesis in Drosophila; however, mammalian intercellular bridges have distinct properties from those of insects. Mammalian germ cell intercellular bridges are composed of general cytokinesis components with additional germ cell-specific factors including TEX14. TEX14 is an inactive kinase essential for the maintenance of stable intercellular bridges in gametes of both sexes but whose loss specifically impairs male meiosis. TEX14 acts to impede the terminal steps of abscission by competing for essential component CEP55, blocking its interaction in nongerm cells with ALIX and TSG101. Additionally, TEX14-interacting protein RBM44, whose localization in stabile intercellular bridges is limited to pachytene and secondary spermatocytes, may participate in processes such as RNA transport but is nonessential to the maintenance of intercellular bridge stability.
Collapse
Affiliation(s)
- Michael P Greenbaum
- Department of Radiation Oncology, Baylor College of Medicine, Houston, Texas 77030, USA
| | | | | | | |
Collapse
|