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Chailapakul P, Maloney O, Hirakawa H, Fujimori A, Kitamura H, Kato TA. The contribution of high-LET track to DNA damage formation and cell death for Monoenergy and SOBP carbon ion irradiation. Biochem Biophys Res Commun 2024; 696:149500. [PMID: 38219488 DOI: 10.1016/j.bbrc.2024.149500] [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: 12/27/2023] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
Carbon ion radiotherapy (CIRT) is a heavy ion charge particle therapy with 29 years of prominent use. Despite advantages like high relative biological effectiveness (RBE), improved quality of life, and reduced treatment time, challenges persist, especially regarding heavy nuclear fragments. Our research addresses these challenges in horizontal irradiation, aiming to comprehend Monoenergetic and Spread-Out Bragg peak (SOBP) carbon ion beam trajectories using cell survival analysis and visualizing biological effects through DNA damage (γ-H2AX). This reveals repair-related protein foci near the Bragg peak. CR-39, a plastic nuclear track detector, was explored to understand high-linear energy transfer (LET) tracks and radiation quality near the Bragg peak. Findings unveil high-LET DNA damage signatures through aligned γ-H2AX foci, correlating with LET values in SOBP. CR-39 visualized high-LET particle exposure, indicating comet-type etch-pits at the Bragg peak and suggesting carbon ion fragmentation. Unexpectedly, dot-type etch-pits in irradiated and post-Bragg peak regions indicated high-LET neutron production. This investigation highlights the intricate interplay of carbon ion beams, stressing the importance of understanding LET variations, DNA damage patterns, and undesired secondary exposure.
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Affiliation(s)
- Piyawan Chailapakul
- Department of Environmental & Radiological Health Sciences, Colorado State University, USA
| | - Olivia Maloney
- Department of Environmental & Radiological Health Sciences, Colorado State University, USA
| | - Hirokazu Hirakawa
- Institute for Quantum Science, National Institutes for Quantum Science and Technology, Japan
| | - Akira Fujimori
- Institute for Quantum Science, National Institutes for Quantum Science and Technology, Japan
| | - Hisashi Kitamura
- Institute for Radiological Science, National Institutes for Quantum Science and Technology, Japan
| | - Takamitsu A Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, USA.
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Maeda J, Jepson B, Sadahiro K, Murakami M, Sakai H, Heishima K, Akao Y, Kato TA. PARP deficiency causes hypersensitivity to Taxol through oxidative stress induced DNA damage. Mutat Res 2023; 827:111826. [PMID: 37300987 DOI: 10.1016/j.mrfmmm.2023.111826] [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: 03/03/2023] [Revised: 05/19/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Taxol is an antitumor drug derived from the bark of the Pacific Yew tree that inhibits microtubule disassembly, resulting in cell cycle arrest in late G2 and M phases. Additionally, Taxol increases cellular oxidative stress by generating reactive oxygen species. We hypothesized that the inhibition of specific DNA repair machinery/mechanisms would increase cellular sensitivity to the oxidative stress capacity of Taxol. Initial screening using Chinese hamster ovary (CHO) cell lines demonstrated that base excision repair deficiency, especially PARP deficiency, caused cellular Taxol hypersensitivity. Taxane diterpenes-containing Taxus yunnanensis extract also showed hypertoxicity in PARP deficient cells, which was consistent with other microtubule inhibitors like colcemid, vinblastine, and vincristine. Acute exposure of 50 nM Taxol treatment induced both significant cytotoxicity and M-phase arrest in PARP deficient cells, but caused neither significant cytotoxicity nor late G2-M cell cycle arrest in wild type cells. Acute exposure of 50 nM Taxol treatment induced oxidative stress and DNA damage. The antioxidant Ascorbic acid 2 glucoside partially reduced the cytotoxicity of Taxol in PARP deficient cell lines. Finally, the PARP inhibitor Olaparib increased cytotoxicity of Taxol in wild type CHO cells and two human cancer cell lines. Our study clearly demonstrates that cytotoxicity of Taxol would be enhanced by inhibiting PARP function as an enzyme implicated in DNA repair for oxidative stress.
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Affiliation(s)
- Junko Maeda
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Ben Jepson
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Kohei Sadahiro
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA
| | - Mami Murakami
- Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Hiroki Sakai
- Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Kazuki Heishima
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Yukihiro Akao
- The United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Takamitsu A Kato
- Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, USA.
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Attia AA, Hamad HA, Fawzy MA, Saleh SR. The Prophylactic Effect of Vitamin C and Vitamin B12 against Ultraviolet-C-Induced Hepatotoxicity in Male Rats. Molecules 2023; 28:molecules28114302. [PMID: 37298780 DOI: 10.3390/molecules28114302] [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: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/19/2023] [Indexed: 06/12/2023] Open
Abstract
Ultraviolet C (UVC) devices are an effective means of disinfecting surfaces and protecting medical tools against various microbes, including coronavirus. Overexposure to UVC can induce oxidative stress, damage the genetic material, and harm biological systems. This study investigated the prophylactic efficacy of vitamin C and B12 against hepatotoxicity in UVC-intoxicated rats. Rats were irradiated with UVC (725.76, 967.68, and 1048.36 J/cm2) for 2 weeks. The rats were pretreated with the aforementioned antioxidants for two months before UVC irradiation. The prophylactic effect of vitamins against UVC hepatotoxicity was evaluated by monitoring the alteration of liver enzyme activities, antioxidant status, apoptotic and inflammatory markers, DNA fragmentation, and histological and ultrastructural alterations. Rats exposed to UVC showed a significant increase in liver enzymes, oxidant-antioxidant balance disruption, and increased hepatic inflammatory markers (TNF-α, IL-1β, iNOS, and IDO-1). Additionally, obvious over-expression of activated caspase-3 protein and DNA fragmentation were detected. Histological and ultrastructural examinations verified the biochemical findings. Co-treatment with vitamins ameliorated the deviated parameters to variable degrees. In conclusion, vitamin C could alleviate UVC-induced hepatotoxicity more than vitamin B12 by diminishing oxidative stress, inflammation, and DNA damage. This study could provide a reference for the clinical practice of vitamin C and B12 as radioprotective for workers in UVC disinfectant areas.
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Affiliation(s)
- Azza A Attia
- Zoology Department, Faculty of Science, Alexandria University, Alexandria 21515, Egypt
| | - Huda A Hamad
- Zoology Department, Faculty of Science, Alexandria University, Alexandria 21515, Egypt
- Zoology Department, Faculty of Science, Omar Al-Mukhtar University, Al Bayda 00218, Libya
| | - M Adel Fawzy
- Physics Department, Faculty of Science, Alexandria University, Alexandria 21515, Egypt
| | - Samar R Saleh
- Biochemistry Department, Faculty of Science, Alexandria University, Alexandria 21515, Egypt
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Sukhonthasilakun S, Mahakunakorn P, Naladta A, Nuankaew K, Nualkaew S, Yenjai C, Nualkaew N. Anti-inflammatory effects of Derris scandens extract on narrowband-ultraviolet B exposed HaCaT human keratinocytes. J Ayurveda Integr Med 2023; 14:100693. [PMID: 36868047 PMCID: PMC9996209 DOI: 10.1016/j.jaim.2023.100693] [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: 02/06/2022] [Revised: 05/21/2022] [Accepted: 02/01/2023] [Indexed: 03/05/2023] Open
Abstract
Narrowband-ultraviolet B (NB-UVB) has been used to treat skin diseases such as psoriasis. Chronic use of NB-UVB might cause skin inflammation and lead to skin cancer. In Thailand, Derris Scandens (Roxb.) Benth. is used as an alternative medicine to nonsteroidal anti-inflammatory drugs (NSAIDs) for low back pain and osteoarthritis. Therefore, this study aimed to evaluate the potential anti-inflammatory effect of Derris scandens extract (DSE) on pre- and post exposed NB-UVB human keratinocytes (HaCaT). The results indicated that DSE could not protect HaCaT from cell morphology changes or DNA fragmentation and could not recover cell proliferation ability from the NB-UVB effects. DSE treatment reduced the expression of genes related to inflammation, collagen degradation, and carcinogenesis, such as IL-1α, IL-1β, IL-6, iNOS, COX-2, MMP-1, MMP-9, and Bax. These results indicated the potential use of DSE as a topical preparation against NB-UVB-induced inflammation, anti-aging, and prevention of skin cancer from phototherapy.
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Affiliation(s)
- Sumrit Sukhonthasilakun
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Pramote Mahakunakorn
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Alisa Naladta
- Department of Biochemistry, Faculty of Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Katesaraporn Nuankaew
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Somsak Nualkaew
- Pharmaceutical Chemistry and Natural Product Research Unit, Faculty of Pharmacy, Mahasarakham University, Mahasarakham, 44150, Thailand
| | - Chavi Yenjai
- Natural Products Research Unit, Center of Excellence for Innovation in Chemistry, Department of Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Natsajee Nualkaew
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand.
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Masłowska KH, Villafañez F, Laureti L, Iwai S, Pagès V. OUP accepted manuscript. Nucleic Acids Res 2022; 50:2074-2080. [PMID: 35104879 PMCID: PMC8887424 DOI: 10.1093/nar/gkac044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 01/11/2022] [Accepted: 01/14/2022] [Indexed: 12/04/2022] Open
Abstract
The DNA damage response (DDR) preserves the genetic integrity of the cell by sensing and repairing damages after a genotoxic stress. Translesion Synthesis (TLS), an error-prone DNA damage tolerance pathway, is controlled by PCNA ubiquitination. In this work, we raise the question whether TLS is controlled locally or globally. Using a recently developed method that allows to follow the bypass of a single lesion inserted into the yeast genome, we show that (i) TLS is controlled locally at each individual lesion by PCNA ubiquitination, (ii) a single lesion is enough to induce PCNA ubiquitination and (iii) PCNA ubiquitination is imperative for TLS to occur. More importantly, we show that the activation of the DDR that follows a genotoxic stress does not increase TLS at individual lesions. We conclude that unlike the SOS response in bacteria, the eukaryotic DDR does not promote TLS and mutagenesis.
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Affiliation(s)
- Katarzyna H Masłowska
- Cancer Research Center of Marseille: Team DNA Damage and Genome Instability | CNRS, Aix Marseille Univ, Inserm, Institut Paoli-Calmettes, Marseille 13009, France
| | - Florencia Villafañez
- Cancer Research Center of Marseille: Team DNA Damage and Genome Instability | CNRS, Aix Marseille Univ, Inserm, Institut Paoli-Calmettes, Marseille 13009, France
| | - Luisa Laureti
- Cancer Research Center of Marseille: Team DNA Damage and Genome Instability | CNRS, Aix Marseille Univ, Inserm, Institut Paoli-Calmettes, Marseille 13009, France
| | - Shigenori Iwai
- Graduate School of Engineering Science, Osaka University, Osaka 560-8531, Japan
| | - Vincent Pagès
- To whom correspondence should be addressed. Tel: +33 4 86 977 384;
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Walsh KD, Burkhart EM, Nagai A, Aizawa Y, Kato TA. Cytotoxicity and genotoxicity of blue LED light and protective effects of AA2G in mammalian cells and associated DNA repair deficient cell lines. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2021; 872:503416. [PMID: 34798940 DOI: 10.1016/j.mrgentox.2021.503416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 09/29/2021] [Accepted: 10/03/2021] [Indexed: 10/20/2022]
Abstract
Light emitting diode (LED) devices emit narrow bands of the blue, green, and red light spectrum rather than the continuous spectrum emitted from sunlight and fluorescent light bulbs. LED devices have become considerably common in society, and the fluence of blue light from LED devices is more intense than other light sources. Previous studies presented that the blue light spectrum may harness potentially inimical genotoxicity. Therefore, the aim of this study was to investigate this potential cytotoxicity and genotoxicity, as well as identify the mechanism of the cellular effects induced by blue LED light exposure in mammalian cell lines with their DNA repair deficient mutants. Our results demonstrated that blue LED light induced both oxidative stress to cells and cytotoxic and genotoxic effects including reduction of clonogenicity, cell cycle arrest, induction of sister chromatid exchanges, endoreduplicated chromosomes, and increased frequency of HPRT locus mutations. In DNA repair deficient cells, particularly those involving double strand break repair deficiency, cells presented hypersensitivity to blue LED light exposure. Blue LED light also induced chromosome aberrations more in DNA repair deficient cells than wild type cells. The cytotoxicity of blue LED light was reduced by an effective antioxidant, ascorbic acid 2-glucoside, which can suppress blue LED light induced oxidative stress. These results indicated that prolonged, high intensity exposure to blue LED light induces genotoxic stress to cells, and oxidative stress induced by blue LED light is targeting DNA to induce these biological effects.
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Affiliation(s)
- Kade D Walsh
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Erica M Burkhart
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Atsushi Nagai
- Research & Development Department, Carlit Holdings Co., Ltd., Gunma, 377-0004, Japan
| | - Yasushi Aizawa
- Research & Development Department, Carlit Holdings Co., Ltd., Gunma, 377-0004, Japan
| | - Takamitsu A Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA.
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Bian Y, Yu H, Jin M, Gao X. Repigmentation by combined narrow‑band ultraviolet B/adipose‑derived stem cell transplantation in the mouse model: Role of Nrf2/HO‑1‑mediated Ca 2+ homeostasis. Mol Med Rep 2021; 25:6. [PMID: 34751412 PMCID: PMC8600419 DOI: 10.3892/mmr.2021.12522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 07/16/2021] [Indexed: 11/06/2022] Open
Abstract
Vitiligo is a depigmentation disease commonly seen in clinical practice, mainly involving loss of functional epidermal pigment cells and hair follicle melanocytes. Narrow‑band ultraviolet B (NB‑UVB) has emerged as the first choice of treatment for vitiligo, but long‑term exposure may have serious consequences. Recently, it was reported that adipose‑derived stem cells (ADSCs) improve melanocyte growth and the efficacy of melanocyte transplantation. The present study aimed to examine the efficacy of NB‑UVB/ADSC‑transplantation combined therapy on a mouse vitiligo model and explore the underlying mechanisms by focusing on endoplasmic reticulum stress and cellular calcium (Ca2+) homeostasis. Vitiligo mice models were established by applying 40% monobenzone (MBZ) cream twice daily and treated with NB‑UVB/ADSC combination therapy. Some treated mice were also given ML385, a nuclear factor erythroid 2 like 2 (Nr2) inhibitor. Histopathological changes were evaluated using a depigmentation evaluation score and observed with hematoxylin and eosin staining on skin tissues. ELISA was used to measure diagnostic markers in plasma. Flow cytometric assay was performed to quantify CD3+, CD4+ and CD8+ levels. Expression levels of associated proteins were detected with western blot and immunofluorescence. Treatment of mice with MBZ‑induced depigmentation patches on the skin was accompanied with loss of redox balance and disruption of cellular Ca2+ homeostasis. Oxidative stress and Ca2+ unbalancing were improved after the mice were treated by NB‑UVB/ADSCs transplantation combination therapy. ML385, strongly negated the protective effect of NB‑UVB/ADSC transplantation combination therapy, indicating the critical role of Nr2 signaling. The findings improved the understanding of the pathogenesis of vitiligo and will guide future development of therapeutic strategies against it.
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Affiliation(s)
- Yuanyuan Bian
- Department of Dermatovenereal Disease, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Hao Yu
- Department of Endocrinology, General Hospital of Northern Theater Command, Shenyang, Liaoning 110016, P.R. China
| | - Mingzhu Jin
- Department of Dermatovenereal Disease, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Xinghua Gao
- Department of Dermatovenereal Disease, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
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Haskins JS, Su C, Maeda J, Walsh KD, Haskins AH, Allum AJ, Froning CE, Kato TA. Evaluating the Genotoxic and Cytotoxic Effects of Thymidine Analogs, 5-Ethynyl-2'-Deoxyuridine and 5-Bromo-2'-Deoxyurdine to Mammalian Cells. Int J Mol Sci 2020; 21:E6631. [PMID: 32927807 PMCID: PMC7555307 DOI: 10.3390/ijms21186631] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 09/02/2020] [Accepted: 09/08/2020] [Indexed: 12/23/2022] Open
Abstract
BrdU (bromodeoxyuridine) and EdU (ethynyldeoxyuridine) have been largely utilized as the means of monitoring DNA replication and cellular division. Although BrdU induces gene and chromosomal mutations and induces sensitization to photons, EdU's effects have not been extensively studied yet. Therefore, we investigated EdU's potential cytotoxic and mutagenic effects and its related underlying mechanisms when administered to Chinese hamster ovary (CHO) wild type and DNA repair-deficient cells. EdU treatment displayed a higher cytotoxicity and genotoxicity than BrdU treatment. Cells with defective homologous recombination repair displayed a greater growth delay and severe inhibition of clonogenicity with EdU compared to wild type and other DNA repair-deficient cells. Inductions of sister chromatid exchange and hypoxanthine phosphorybosyl transferase (HPRT) mutation were observed in EdU-incorporated cells as well. Interestingly, on the other hand, EdU did not induce sensitization to photons to the same degree as BrdU. Our results demonstrate that elevated concentrations (similar to manufacturers suggested concentration; >5-10 μM) of EdU treatment were toxic to the cell cultures, particularly in cells with a defect in homologous recombination repair. Therefore, EdU should be administered with additional precautions.
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Affiliation(s)
| | | | | | | | | | | | | | - Takamitsu A. Kato
- Department of Environmental & Radiological Health Sciences, Colorado State University, Fort Collins, CO 80526, USA; (J.S.H.); (C.S.); (J.M.); (K.D.W.); (A.H.H.); (A.J.A.); (C.E.F.)
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