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de Sousa Pinto M, Fontoura LGO, da Rosa Borges I, Vieira de Melo Bisneto A, Rosa de Oliveira G, Carneiro LC, Chen Chen L, Vieira de Moraes Filho A. Evaluation of infliximab-induced genotoxicity and possible action on BCL-2 and P53 genes. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2024; 87:752-761. [PMID: 38922576 DOI: 10.1080/15287394.2024.2368619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
Although the last pandemic created an urgency for development of vaccines, there was a continuous and concerted effort to search for therapeutic medications among existing drugs with different indications. One of the medications of interest that underwent this change was infliximab (IFM). This drug is used as an anti-inflammatory, predominantly in patients with Crohn 's disease, colitis ulcerative, and rheumatoid arthritis. In addition to these patients, individuals infected with Coronavirus Disease (COVID-19) were administered this chimeric monoclonal antibody (IMF) to act as an immunomodulator for patients in the absence of comprehensive research. Consequently, the present study aimed to examine the genotoxic effects attributed to IFM treatment employing different assays in vivo using mouse Mus musculus. Therefore, IFM was found to induce genotoxic effects as evidenced by the comet assay but did not demonstrate genotoxic potential utilizing mouse bone marrow MN test. The results of evaluating the expression of the P53 and BCL-2 genes using RT-qPCR showed stimulation of expression of these genes at 24 hr followed by a decline at 48 hr. Although the comet assay provided positive results, it is noteworthy that based upon negative findings in the micronucleus test, the data did not demonstrate significant changes in the genetic material that might affect the therapeutic use of IFM. The stimulation of expression of P53 and BCL-2 genes at 24 hr followed by a decline at 48 hr suggest a transient, if any, effect on genetic material. However, there is still a need for more research to more comprehensively understand the genotoxic profile of this medication.
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Affiliation(s)
- Murillo de Sousa Pinto
- Faculty of Pharmacy, Graduate Program in Health Assistance and Evaluation, Federal University of Goiás, Goiânia, Brazil
- Institute of Health Sciences, Alfredo Nasser University Center, Goiânia, Goiás, Brazil
| | | | | | - Abel Vieira de Melo Bisneto
- Institute of Biological Sciences, Department of Genetics, Laboratory of Radiobiology and Mutagenesis, Federal University of Goiás, Goiânia, Brazil
| | | | - Lílian Carla Carneiro
- Department of Biotechnology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Lee Chen Chen
- Institute of Biological Sciences, Department of Genetics, Laboratory of Radiobiology and Mutagenesis, Federal University of Goiás, Goiânia, Brazil
| | - Aroldo Vieira de Moraes Filho
- Faculty of Pharmacy, Graduate Program in Health Assistance and Evaluation, Federal University of Goiás, Goiânia, Brazil
- Institute of Health Sciences, Alfredo Nasser University Center, Goiânia, Goiás, Brazil
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2
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Malatesta P, Kyriakidis K, Hada M, Ikeda H, Takahashi A, Saganti PB, Georgakilas AG, Michalopoulos I. Differential Gene Expression in Human Fibroblasts Simultaneously Exposed to Ionizing Radiation and Simulated Microgravity. Biomolecules 2024; 14:88. [PMID: 38254688 PMCID: PMC10812944 DOI: 10.3390/biom14010088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 12/23/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
During future space missions, astronauts will be exposed to cosmic radiation and microgravity (μG), which are known to be health risk factors. To examine the differentially expressed genes (DEG) and their prevalent biological processes and pathways as a response to these two risk factors simultaneously, 1BR-hTERT human fibroblast cells were cultured under 1 gravity (1G) or simulated μG for 48 h in total and collected at 0 (sham irradiated), 3 or 24 h after 1 Gy of X-ray or Carbon-ion (C-ion) irradiation. A three-dimensional clinostat was used for the simulation of μG and the simultaneous radiation exposure of the samples. The RNA-seq method was used to produce lists of differentially expressed genes between different environmental conditions. Over-representation analyses were performed and the enriched biological pathways and targeting transcription factors were identified. Comparing sham-irradiated cells under simulated μG and 1G conditions, terms related to response to oxygen levels and muscle contraction were identified. After irradiation with X-rays or C-ions under 1G, identified DEGs were found to be involved in DNA damage repair, signal transduction by p53 class mediator, cell cycle arrest and apoptosis pathways. The same enriched pathways emerged when cells were irradiated under simulated μG condition. Nevertheless, the combined effect attenuated the transcriptional response to irradiation which may pose a subtle risk in space flights.
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Affiliation(s)
- Polina Malatesta
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece; (P.M.); (K.K.)
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 15780 Athens, Greece
| | - Konstantinos Kyriakidis
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece; (P.M.); (K.K.)
- Laboratory of Pharmacology, School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
- UC Santa Cruz Genomics Institute, Santa Cruz, CA 95060, USA
| | - Megumi Hada
- Radiation Institute for Science & Engineering, Prairie View A&M University, Prairie View, TX 77446, USA; (M.H.); (P.B.S.)
| | - Hiroko Ikeda
- Department of Life Science, Faculty of Science and Engineering, Kindai University, Higashiosaka 577-8502, Japan;
| | - Akihisa Takahashi
- Gunma University Heavy Ion Medical Center, Maebashi 371-8511, Japan;
| | - Premkumar B. Saganti
- Radiation Institute for Science & Engineering, Prairie View A&M University, Prairie View, TX 77446, USA; (M.H.); (P.B.S.)
| | - Alexandros G. Georgakilas
- DNA Damage Laboratory, Physics Department, School of Applied Mathematical and Physical Sciences, National Technical University of Athens, 15780 Athens, Greece
| | - Ioannis Michalopoulos
- Center of Systems Biology, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece; (P.M.); (K.K.)
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Liu H, Fu H, Yu C, Zhang N, Huang C, Lv L, Hu C, Chen F, Xiao Z, Zhang Z, Lu H, Yuan K. Transcriptional pausing induced by ionizing radiation enables the acquisition of radioresistance in nasopharyngeal carcinoma. J Mol Cell Biol 2024; 15:mjad044. [PMID: 37407287 PMCID: PMC10960568 DOI: 10.1093/jmcb/mjad044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 03/24/2023] [Accepted: 07/04/2023] [Indexed: 07/07/2023] Open
Abstract
Lesions on the DNA template can impact transcription via distinct regulatory pathways. Ionizing radiation (IR) as the mainstay modality for many malignancies elicits most of the cytotoxicity by inducing a variety of DNA damages in the genome. How the IR treatment alters the transcription cycle and whether it contributes to the development of radioresistance remain poorly understood. Here, we report an increase in the paused RNA polymerase II (RNAPII), as indicated by the phosphorylation at serine 5 residue of its C-terminal domain, in recurrent nasopharyngeal carcinoma (NPC) patient samples after IR treatment and cultured NPC cells developing IR resistance. Reducing the pool of paused RNAPII by either inhibiting TFIIH-associated CDK7 or stimulating the positive transcription elongation factor b, a CDK9-CycT1 heterodimer, attenuates IR resistance of NPC cells. Interestingly, the poly(ADP-ribosyl)ation of CycT1, which disrupts its phase separation, is elevated in the IR-resistant cells. Mutation of the major poly(ADP-ribosyl)ation sites of CycT1 decreases RNAPII pausing and restores IR sensitivity. Genome-wide chromatin immunoprecipitation followed by sequencing analyses reveal that several genes involved in radiation response and cell cycle control are subject to the regulation imposed by the paused RNAPII. Particularly, we identify the NIMA-related kinase NEK7 under such regulation as a new radioresistance factor, whose downregulation results in the increased chromosome instability, enabling the development of IR resistance. Overall, our results highlight a novel link between the alteration in the transcription cycle and the acquisition of IR resistance, opening up new opportunities to increase the efficacy of radiotherapy and thwart radioresistance in NPC.
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Affiliation(s)
- Honglu Liu
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Huanyi Fu
- Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Chunhong Yu
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Na Zhang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Canhua Huang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Lu Lv
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Chunhong Hu
- Department of Oncology, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Fang Chen
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
| | - Zhiqiang Xiao
- Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Zhuohua Zhang
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
| | - Huasong Lu
- Zhejiang Provincial Key Laboratory for Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou 310058, China
| | - Kai Yuan
- Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha 410008, China
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha 410008, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha 410008, China
- The Biobank of Xiangya Hospital, Central South University, Changsha 410008, China
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4
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Fornieles G, Núñez MI, Expósito J. Matrix Metalloproteinases and Their Inhibitors as Potential Prognostic Biomarkers in Head and Neck Cancer after Radiotherapy. Int J Mol Sci 2023; 25:527. [PMID: 38203696 PMCID: PMC10778974 DOI: 10.3390/ijms25010527] [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: 11/17/2023] [Revised: 12/18/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Head and neck cancer (HNC) is among the ten most frequent tumours, with 5-year survival rates varying from 30% to 70% depending on the stage and location of the tumour. HNC is traditionally known as head and neck squamous cell carcinoma (HNSCC), since 90% arises from epithelial cells. Metastasis remains a major cause of mortality in patients with HNSCC. HNSCC patients with metastatic disease have an extremely poor prognosis with a survival rate of less than a year. Matrix metalloproteinases (MMPs) have been described as biomarkers that promote cell migration and invasion. Radiotherapy is widely used to treat HNSCC, being a determining factor in the alteration of the tumour's biology and microenvironment. This review focuses on analysing the current state of the scientific literature on this topic. Although few studies have focused on the role of these proteinases in HNC, some authors have concluded that radiotherapy alters the behaviour of MMPs and tissue inhibitors of metalloproteinases (TIMPs). Therefore, more research is needed to understand the roles played by MMPs and their inhibitors (TIMPs) as prognostic biomarkers in patients with HNC and their involvement in the response to radiotherapy.
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Affiliation(s)
- Gabriel Fornieles
- Doctoral Programme in Clinical Medicine and Public Health, University of Granada, 18012 Granada, Spain;
| | - María Isabel Núñez
- Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016 Granada, Spain;
- Biopathology and Regenerative Medicine Institute (IBIMER), Centre for Biomedical Research, University of Granada, 18016 Granada, Spain
- Biosanitary Institute of Granada (ibs.GRANADA), 18012 Granada, Spain
| | - José Expósito
- Department of Radiology and Physical Medicine, School of Medicine, University of Granada, 18016 Granada, Spain;
- Biosanitary Institute of Granada (ibs.GRANADA), 18012 Granada, Spain
- Radiation Oncology Department, Virgen de las Nieves University Hospital, 18014 Granada, Spain
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5
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Wang L, Rivas R, Wilson A, Park YM, Walls S, Yu T, Miller AC. Dose-Dependent Effects of Radiation on Mitochondrial Morphology and Clonogenic Cell Survival in Human Microvascular Endothelial Cells. Cells 2023; 13:39. [PMID: 38201243 PMCID: PMC10778067 DOI: 10.3390/cells13010039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024] Open
Abstract
To better understand radiation-induced organ dysfunction at both high and low doses, it is critical to understand how endothelial cells (ECs) respond to radiation. The impact of irradiation (IR) on ECs varies depending on the dose administered. High doses can directly damage ECs, leading to EC impairment. In contrast, the effects of low doses on ECs are subtle but more complex. Low doses in this study refer to radiation exposure levels that are below those that cause immediate and necrotic damage. Mitochondria are the primary cellular components affected by IR, and this study explored their role in determining the effect of radiation on microvascular endothelial cells. Human dermal microvascular ECs (HMEC-1) were exposed to varying IR doses ranging from 0.1 Gy to 8 Gy (~0.4 Gy/min) in the AFRRI 60-Cobalt facility. Results indicated that high doses led to a dose-dependent reduction in cell survival, which can be attributed to factors such as DNA damage, oxidative stress, cell senescence, and mitochondrial dysfunction. However, low doses induced a small but significant increase in cell survival, and this was achieved without detectable DNA damage, oxidative stress, cell senescence, or mitochondrial dysfunction in HMEC-1. Moreover, the mitochondrial morphology was assessed, revealing that all doses increased the percentage of elongated mitochondria, with low doses (0.25 Gy and 0.5 Gy) having a greater effect than high doses. However, only high doses caused an increase in mitochondrial fragmentation/swelling. The study further revealed that low doses induced mitochondrial elongation, likely via an increase in mitochondrial fusion protein 1 (Mfn1), while high doses caused mitochondrial fragmentation via a decrease in optic atrophy protein 1 (Opa1). In conclusion, the study suggests, for the first time, that changes in mitochondrial morphology are likely involved in the mechanism for the radiation dose-dependent effect on the survival of microvascular endothelial cells. This research, by delineating the specific mechanisms through which radiation affects endothelial cells, offers invaluable insights into the potential impact of radiation exposure on cardiovascular health.
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Affiliation(s)
- Li Wang
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA; (L.W.); (R.R.); (A.W.); (S.W.)
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA; (Y.M.P.); (T.Y.)
| | - Rafael Rivas
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA; (L.W.); (R.R.); (A.W.); (S.W.)
| | - Angelo Wilson
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA; (L.W.); (R.R.); (A.W.); (S.W.)
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA; (Y.M.P.); (T.Y.)
| | - Yu Min Park
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA; (Y.M.P.); (T.Y.)
- Consortium for Health and Military Performance, Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Shannon Walls
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA; (L.W.); (R.R.); (A.W.); (S.W.)
| | - Tianzheng Yu
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA; (Y.M.P.); (T.Y.)
- Consortium for Health and Military Performance, Department of Military and Emergency Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Alexandra C. Miller
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA; (L.W.); (R.R.); (A.W.); (S.W.)
- Department of Radiation Science and Radiology, Uniformed Services University Health Sciences, Bethesda, MD 20889, USA
- Columbia University Irving Medical Center, Columbia University, New York, NY 10032, USA
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6
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Abishev Z, Ruslanova B, Apbassova S, Shabdarbayeva D, Chaizhunussova N, Dyusupov A, Azhimkhanov A, Zhumadilov K, Stepanenko V, Ivanov S, Shegay P, Kaprin A, Hoshi M, Fujimoto N. Effects of Radioactive 56MnO 2 Particle Inhalation on Mouse Lungs: A Comparison between C57BL and BALB/c. Int J Mol Sci 2023; 24:17605. [PMID: 38139433 PMCID: PMC10743477 DOI: 10.3390/ijms242417605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/15/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023] Open
Abstract
The effects of residual radiation from atomic bombs have been considered to be minimal because of its low levels of external radioactivity. However, studies involving atomic bomb survivors exposed to only residual radiation in Hiroshima and Nagasaki have indicated possible adverse health effects. Thus, we investigated the biological effects of radioactive dust of manganese dioxide 56 (56MnO2), a major radioisotope formed in soil by neutron beams from a bomb. Previously, we investigated C57BL mice exposed to 56MnO2 and found pulmonary gene expression changes despite low radiation doses. In this study, we examined the effects in a radiation-sensitive strain of mice, BALB/c, and compared them with those in C57BL mice. The animals were exposed to 56MnO2 particles at two radioactivity levels and examined 3 and 65 days after exposure. The mRNA expression of pulmonary pathophysiology markers, including Aqp1, Aqp5, and Smad7, and radiation-sensitive genes, including Bax, Phlda3, and Faim3, was determined in the lungs. The radiation doses absorbed in the lungs ranged from 110 to 380 mGy; no significant difference was observed between the two strains. No exposure-related pathological changes were observed in the lungs of any group. However, the mRNA expression of Aqp1 was significantly elevated in C57BL mice but not in BALB/c mice 65 days after exposure, whereas no changes were observed in external γ-rays (2 Gy) in either strain. In contrast, Faim3, a radiation-dependently downregulated gene, was reduced by 56MnO2 exposure in BALB/c mice but not in C57BL mice. These data demonstrate that inhalation exposure to 56MnO2 affected the expression of pulmonary genes at doses <380 mGy, which is comparable to 2 Gy of external γ-irradiation, whereas the responses differed between the two mouse strains.
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Affiliation(s)
- Zhaslan Abishev
- Department of Pathological Anatomy and Forensic Medicine, Semey Medical University, Semey 071400, Kazakhstan; (Z.A.); (B.R.); (S.A.); (D.S.)
| | - Bakhyt Ruslanova
- Department of Pathological Anatomy and Forensic Medicine, Semey Medical University, Semey 071400, Kazakhstan; (Z.A.); (B.R.); (S.A.); (D.S.)
| | - Saulesh Apbassova
- Department of Pathological Anatomy and Forensic Medicine, Semey Medical University, Semey 071400, Kazakhstan; (Z.A.); (B.R.); (S.A.); (D.S.)
| | - Dariya Shabdarbayeva
- Department of Pathological Anatomy and Forensic Medicine, Semey Medical University, Semey 071400, Kazakhstan; (Z.A.); (B.R.); (S.A.); (D.S.)
| | | | - Altai Dyusupov
- Rector’s Office, Semey Medical University, Semey 071400, Kazakhstan;
| | - Almas Azhimkhanov
- National Nuclear Center of the Republic of Kazakhstan, Kurchatov 071100, Kazakhstan;
| | - Kassym Zhumadilov
- Department of Nuclear Physics, L.N. Gumilyov Eurasian National University, Astana 010000, Kazakhstan;
| | - Valeriy Stepanenko
- A. Tsyb Medical Radiological Research Centre—Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 249031 Obninsk, Russia; (V.S.); (S.I.)
| | - Sergey Ivanov
- A. Tsyb Medical Radiological Research Centre—Branch of the National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 249031 Obninsk, Russia; (V.S.); (S.I.)
| | - Peter Shegay
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 249036 Obninsk, Russia; (P.S.); (A.K.)
| | - Andrey Kaprin
- National Medical Research Radiological Centre of the Ministry of Health of the Russian Federation, 249036 Obninsk, Russia; (P.S.); (A.K.)
| | - Masaharu Hoshi
- The Center for Peace, Hiroshima University, Hiroshima 730-0053, Japan;
| | - Nariaki Fujimoto
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-0037, Japan
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Kohzaki M, Suzuki K, Ootsuyama A, Okazaki R. Spontaneous p53 activation in middle-aged C57BL/6 mice mitigates the lifespan-extending adaptive response induced by low-dose ionizing radiation. NPJ AGING 2023; 9:26. [PMID: 37935713 PMCID: PMC10630390 DOI: 10.1038/s41514-023-00123-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 09/22/2023] [Indexed: 11/09/2023]
Abstract
Understanding the biological effects of low-dose (<100 mGy) ionizing radiation (LDR) is technically challenging. We investigated age-dependent LDR effects using adaptive response experiments in young (7-to 12-week-old) and middle-aged (40-to 62-week-old) C57BL/6 mice. Compared with 3 Gy irradiation, 0.02 Gy preirradiation followed by 3 Gy irradiation prolonged life in young mice but not middle-aged mice. Preirradiation also suppressed irradiation-induced 53BP1 repair foci in the small intestines, splenic apoptosis, and p53 activity in young mice but not middle-aged mice. Young p53+/- C57BL/6 mice did not show these adaptive responses, indicating that insufficient p53 function in young mice mitigated the adaptive responses. Interestingly, p53 activation in middle-aged mice spontaneously became approximately 4.5-fold greater than that in young mice, possibly masking LDR stresses. Furthermore, adaptive responses in young mice, but not in middle-aged mice, suppressed some senescence-associated secretory phenotype (SASP) factors (IL-6, CCL2, CCL5, CXCL1). Thus, LDR-induced adaptive responses associated with specific SASP factors may be attenuated by a combination of reduced DNA damage sensor/transducer function and chronic p53 activation in middle-aged mice.
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Affiliation(s)
- Masaoki Kohzaki
- Department of Radiobiology and Hygiene Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan.
| | - Keiji Suzuki
- Department of Radiation Medical Sciences, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Akira Ootsuyama
- Department of Radiation Biology and Health, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ryuji Okazaki
- Department of Radiobiology and Hygiene Management, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Kitakyushu, Japan
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8
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Rabah N, Ait Mohand FE, Kravchenko-Balasha N. Understanding Glioblastoma Signaling, Heterogeneity, Invasiveness, and Drug Delivery Barriers. Int J Mol Sci 2023; 24:14256. [PMID: 37762559 PMCID: PMC10532387 DOI: 10.3390/ijms241814256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The most prevalent and aggressive type of brain cancer, namely, glioblastoma (GBM), is characterized by intra- and inter-tumor heterogeneity and strong spreading capacity, which makes treatment ineffective. A true therapeutic answer is still in its infancy despite various studies that have made significant progress toward understanding the mechanisms behind GBM recurrence and its resistance. The primary causes of GBM recurrence are attributed to the heterogeneity and diffusive nature; therefore, monitoring the tumor's heterogeneity and spreading may offer a set of therapeutic targets that could improve the clinical management of GBM and prevent tumor relapse. Additionally, the blood-brain barrier (BBB)-related poor drug delivery that prevents effective drug concentrations within the tumor is discussed. With a primary emphasis on signaling heterogeneity, tumor infiltration, and computational modeling of GBM, this review covers typical therapeutic difficulties and factors contributing to drug resistance development and discusses potential therapeutic approaches.
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Affiliation(s)
| | | | - Nataly Kravchenko-Balasha
- The Institute of Biomedical and Oral Research, Hebrew University of Jerusalem, Jerusalem 91120, Israel; (N.R.); (F.-E.A.M.)
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