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Kang F, Wu J, Hong L, Zhang P, Song J. Iodine-125 seed inhibits proliferation and promotes apoptosis of cholangiocarcinoma cells by inducing the ROS/p53 axis. Funct Integr Genomics 2024; 24:114. [PMID: 38862667 PMCID: PMC11166828 DOI: 10.1007/s10142-024-01392-1] [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: 03/09/2024] [Revised: 05/31/2024] [Accepted: 06/05/2024] [Indexed: 06/13/2024]
Abstract
With advances in radioactive particle implantation in clinical practice, Iodine-125 (125I) seed brachytherapy has emerged as a promising treatment for cholangiocarcinoma (CCA), showing good prognosis; however, the underlying molecular mechanism of the therapeutic effect of 125I seed is unclear. To study the effects of 125I seed on the proliferation and apoptosis of CCA cells. CCA cell lines, RBE and HCCC-9810, were treated with reactive oxygen species (ROS) scavenger acetylcysteine (NAC) or the p53 functional inhibitor, pifithrin-α hydrobromide (PFTα). Cell counting kit-8 (CCK-8) assay, 5-bromo-2-deoxy-uridine (BrdU) staining, and terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end labeling (TUNEL) assay and flow cytometry assay were performed to test the radiation-sensitivity of 125I seed toward CCA cells at different radiation doses (0.4 mCi and 0.8 mCi). 2,7-dichlorofluorescein diacetate (DCF-DA) assay, real-time quantitative polymerase chain reaction (RT-qPCR), and western blot analysis were performed to assess the effect of 125I seed on the ROS/p53 axis. A dose-dependent inhibitory effect of 125I seeds on the proliferation of CCA cells was observed. The 125I seed promoted apoptosis of CCA cells and induced the activation of the ROS/p53 pathway in a dose-dependent manner. NAC or PFTα treatment effectively reversed the stimulatory effect of 125I seed on the proliferation of CCA cells. NAC or PFTα suppressed apoptosis and p53 protein expression induced by the 125I seed. 125I seed can inhibit cell growth mainly through the apoptotic pathway. The mechanism may involve the activation of p53 and its downstream apoptotic pathway by up-regulating the level of ROS in cells.
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Affiliation(s)
- Fuping Kang
- Department of Hepatobiliary Surgery, General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan City, Ningxia Hui Autonomous Region, 750004, China
| | - Jing Wu
- Medical Experiment Center, General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan City, Ningxia Hui Autonomous Region, 750004, China
| | - Li Hong
- Department of Pediatrics, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan City, Ningxia Hui Autonomous Region, China
| | - Peng Zhang
- Department of Hepatobiliary Surgery, General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan City, Ningxia Hui Autonomous Region, 750004, China
| | - Jianjun Song
- Department of Hepatobiliary Surgery, General Hospital of Ningxia Medical University, 804 Shengli South Street, Yinchuan City, Ningxia Hui Autonomous Region, 750004, China.
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2
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Zimmer J, Mueller L, Frank-Herrmann P, Rehnitz J, Dietrich JE, Bettendorf M, Strowitzki T, Krivega M. Low androgen signaling rescues genome integrity with innate immune response by reducing fertility in humans. Cell Death Dis 2024; 15:30. [PMID: 38212646 PMCID: PMC10784536 DOI: 10.1038/s41419-023-06397-5] [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: 08/18/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 01/13/2024]
Abstract
Development of the gonads under complex androgen regulation is critical for germ cells specification. In this work we addressed the relationship between androgens and genomic integrity determining human fertility. We used different study groups: individuals with Differences of Sex Development (DSD), including Complete Androgen Insensitivity Syndrome (CAIS) due to mutated androgen receptor (AR), and men with idiopathic nonobstructive azoospermia. Both showed genome integrity status influenced by androgen signaling via innate immune response activation in blood and gonads. Whole proteome analysis connected low AR to interleukin-specific gene expression, while compromised genome stability and tumorigenesis were also supported by interferons. AR expression was associated with predominant DNA damage phenotype, that eliminated AR-positive Sertoli cells as the degeneration of gonads increased. Low AR contributed to resistance from the inhibition of DNA repair in primary leukocytes. Downregulation of androgen promoted apoptosis and specific innate immune response with higher susceptibility in cells carrying genomic instability.
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Affiliation(s)
- J Zimmer
- Research Group of Gonadal Differentiation and Embryonic Development, Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - L Mueller
- Research Group of Gonadal Differentiation and Embryonic Development, Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - P Frank-Herrmann
- Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - J Rehnitz
- Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - J E Dietrich
- Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - M Bettendorf
- Division of Pediatric Endocrinology, Children's Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - T Strowitzki
- Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany
| | - M Krivega
- Research Group of Gonadal Differentiation and Embryonic Development, Department of Gynecological Endocrinology & Fertility Disorders, Women Hospital, University of Heidelberg, 69120, Heidelberg, Germany.
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3
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Zhao P, Zeng Q. Progress in the Enantioselective Synthesis of Sulfur (VI) Compounds. Chemistry 2023; 29:e202302059. [PMID: 37394960 DOI: 10.1002/chem.202302059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/04/2023]
Abstract
In recent years, there has been a notable surge in the prominence of enantioenriched sulfur(VI) compounds within the chemical science, particularly in the realm of bioactive molecules. However, the synthesis of these enantioenriched sulfur(VI) compounds has posed significant challenges, necessitating the exploration of diverse synthetic methods. Accordingly, this review aims to provide an in-depth analysis of the latest advancements in the synthesis of sulfoximines, sulfonimidate esters, sulfonimidamides, and sulfonimidoyl halides, with a focus on developments since 1971.
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Affiliation(s)
- Ping Zhao
- College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
| | - Qingle Zeng
- College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, China
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4
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Jain V, Saini D, Soren DC, Kumar VA, Vivek Kumar PR, Koya PKM, Jaikrishan G, Das B. Non-linear dose response of DNA double strand breaks in response to chronic low dose radiation in individuals from high level natural radiation areas of Kerala coast. Genes Environ 2023; 45:16. [PMID: 37127760 PMCID: PMC10150514 DOI: 10.1186/s41021-023-00273-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 04/06/2023] [Indexed: 05/03/2023] Open
Abstract
BACKGROUND The human population living in high level natural radiation areas (HLNRAs) of Kerala coast provide unique opportunities to study the biological effects of low dose and low dose rate ionizing radiation below 100 mGy. The level of radiation in this area varies from < 1.0 to 45 mGy/year. The areas with ≤ 1.50 mGy/year are considered as normal level natural radiation areas (NLNRA) and > 1.50 mGy/year, as high level natural radiation areas (HLNRA). The present study evaluated dose response relationship between DNA double strand breaks (DSBs) and background radiation dose in individuals residing in Kerala coast. Venous blood samples were collected from 200 individuals belonging to NLNRA (n = 50) and four dose groups of HLNRA; 1.51-5.0 mGy/year (n = 50), 5.01-10.0 mGy/year (n = 30), 10.01-15.0 mGy/year (n = 33), > 15.0 mGy/year (n = 37) with written informed consent. The mean dose of NLNRA and four HLNRA dose groups studied are 1.21 ± 0.21 (range: 0.57-1.49), 3.02 ± 0.95 (range: 1.57-4.93), 7.43 ± 1.48 (range: 5.01-9.75), 12.22 ± 1.47 (range: 10.21-14.99), 21.64 ± 6.28 (range: 15.26-39.88) mGy/year, respectively. DNA DSBs were quantified using γH2AX as a marker, where foci were counted per cell using fluorescence microscopy. RESULTS Our results revealed that the frequency of γH2AX foci per cell was 0.090 ± 0.051 and 0.096 ± 0.051, respectively in NLNRA and HLNRA individuals, which were not significantly different (t198 = 0.33; P = 0.739). The frequency of γH2AX foci was observed to be 0.090 ± 0.051, 0.096 ± 0.051, 0.076 ± 0.036, 0.087 ± 0.042, 0.108 ± 0.046 per cell, respectively in different dose groups of ≤ 1.50, 1.51-5.0, 5.01-10.0, 10.01-15.0, > 15.0mGy/year (ANOVA, F4,195 = 2.18, P = 0.072) and suggested non-linearity in dose response. The frequency of γH2AX foci was observed to be 0.098 ± 0.042, 0.078 ± 0.037, 0.084 ± 0.042, 0.099 ± 0.058, 0.097 ± 0.06 and 0.114 ± 0.033 per cell in the age groups of ≤ 29, 30-34, 35-39, 40-44, 45-49 and ≥ 50 years, respectively (ANOVA, F5,194 = 2.17, P = 0.059), which suggested marginal influence of age on the baseline of DSBs. Personal habits such as smoking (No v/s Yes: 0.092 ± 0.047 v/s 0.093 ± 0.048, t198 = 0.13; P = 0.895) and drinking alcohol (No v/s Yes: 0.096 ± 0.052 v/s 0.091 ± 0.045, t198 = 0.62; P = 0.538) did not show any influence on DSBs in the population. CONCLUSION The present study did not show any increase in DSBs in different dose groups of HLNRA compared to NLNRA, however, it suggested a non-linear dose response between DNA DSBs and chronic low dose radiation.
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Affiliation(s)
- Vinay Jain
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India
| | - Divyalakshmi Saini
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - D C Soren
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - V Anil Kumar
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India
| | - P R Vivek Kumar
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India
| | - P K M Koya
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
| | - G Jaikrishan
- Low Level Radiation Research Laboratory, LLRRS, RB&HSD, BSG, BARC, IRE Campus, Beach Road, Kollam, Kerala, 691 001, India
| | - Birajalaxmi Das
- Low Level Radiation Research Section (LLRRS), Radiation Biology & Health Sciences Division (RB&HSD), Bio-Sciences Group (BSG), Bhabha Atomic Research Centre (BARC), Trombay, Mumbai, 400 085, India.
- Homi Bhabha National Institute (HBNI), Anushakti Nagar, Trombay, Mumbai, 400 094, India.
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Junghans M, John F, Cihankaya H, Schliebs D, Winklhofer KF, Bader V, Matschke J, Theiss C, Matschke V. ROS scavengers decrease γH2ax spots in motor neuronal nuclei of ALS model mice in vitro. Front Cell Neurosci 2022; 16:963169. [PMID: 36119129 PMCID: PMC9470831 DOI: 10.3389/fncel.2022.963169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/08/2022] [Indexed: 12/05/2022] Open
Abstract
Background: Amyotrophic lateral sclerosis (ALS) is an incurable neurodegenerative disease characterized by the loss of motor neurons in cerebral cortex, brainstem and spinal cord. Numerous studies have demonstrated signs of oxidative stress in postmortem neuronal tissue, cerebrospinal fluid, plasma and urine of ALS patients, without focusing on the specific processes within motor neurons. Thus, we aimed to investigate the relevance of reactive oxygen species (ROS) detoxification mechanisms and its consequences on the formation of toxic/lethal DNA double strand breaks (DSBs) in the ALS model of the Wobbler mouse. Methods: Live cell imaging in dissociated motor neuronal cultures was used to investigate the production of ROS using Dihydroethidium (DHE). The expression levels of ROS detoxifying molecules were investigated by qPCR as well as Western blots. Furthermore, the expression levels of DNA damage response proteins p53bp1 and H2ax were investigated using qPCR and immunofluorescence staining. Proof-of-principle experiments using ROS scavengers were performed in vitro to decipher the influence of ROS on the formation of DNA double strand breaks quantifying the γH2ax spots formation. Results: Here, we verified an elevated ROS-level in spinal motor neurons of symptomatic Wobbler mice in vitro. As a result, an increased number of DNA damage response proteins p53bp1 and γH2ax in dissociated motor neurons of the spinal cord of Wobbler mice was observed. Furthermore, we found a significantly altered expression of several antioxidant molecules in the spinal cord of Wobbler mice, suggesting a deficit in ROS detoxification mechanisms. This hypothesis could be verified by using ROS scavenger molecules in vitro to reduce the number of γH2ax foci in dissociated motor neurons and thus counteract the harmful effects of ROS. Conclusion: Our data indicate that maintenance of redox homeostasis may play a key role in the therapy of the neurodegenerative disease ALS. Our results underline a necessity for multimodal treatment approaches to prolong the average lifespan of motor neurons and thus slow down the progression of the disease, since a focused intervention in one pathomechanism seems to be insufficient in ALS therapy.
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Affiliation(s)
- Maya Junghans
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
| | - Felix John
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
| | - Hilal Cihankaya
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
| | - Daniel Schliebs
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
| | - Konstanze F. Winklhofer
- Department of Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
- Cluster of Excellence RESOLV, Bochum, Germany
| | - Verian Bader
- Department of Molecular Cell Biology, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
- Department of Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany
| | - Johann Matschke
- Institute of Cell Biology (Cancer Research), University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Carsten Theiss
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
| | - Veronika Matschke
- Department of Cytology, Institute of Anatomy, Ruhr University Bochum, Bochum, Germany
- *Correspondence: Veronika Matschke
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6
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Qian R, Wang K, Guo Y, Li H, Zhu Z, Huang X, Gong C, Gao Y, Guo R, Yang B, Wang C, Jiang D, Lan X, An R, Gao Z. Minimizing adverse effects of Cerenkov radiation induced photodynamic therapy with transformable photosensitizer-loaded nanovesicles. J Nanobiotechnology 2022; 20:203. [PMID: 35477389 PMCID: PMC9044600 DOI: 10.1186/s12951-022-01401-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/28/2022] [Indexed: 01/12/2023] Open
Abstract
Background Photodynamic therapy (PDT) is a promising antitumor strategy with fewer adverse effects and higher selectivity than conventional therapies. Recently, a series of reports have suggested that PDT induced by Cerenkov radiation (CR) (CR-PDT) has deeper tissue penetration than traditional PDT; however, the strategy of coupling radionuclides with photosensitizers may cause severe side effects. Methods We designed tumor-targeting nanoparticles (131I-EM@ALA) by loading 5-aminolevulinic acid (ALA) into an 131I-labeled exosome mimetic (EM) to achieve combined antitumor therapy. In addition to playing a radiotherapeutic role, 131I served as an internal light source for the Cerenkov radiation (CR). Results The drug-loaded nanoparticles effectively targeted tumors as confirmed by confocal imaging, flow cytometry, and small animal fluorescence imaging. In vitro and in vivo experiments demonstrated that 131I-EM@ALA produced a promising antitumor effect through the synergy of radiotherapy and CR-PDT. The nanoparticles killed tumor cells by inducing DNA damage and activating the lysosome-mitochondrial pathways. No obvious abnormalities in the hematology analyses, blood biochemistry, or histological examinations were observed during the treatment. Conclusions We successfully engineered a nanocarrier coloaded with the radionuclide 131I and a photosensitizer precursor for combined radiotherapy and PDT for the treatment of breast cancer. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-022-01401-0.
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Affiliation(s)
- Ruijie Qian
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Kun Wang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Yawen Guo
- Department of Oncology, Tongji Medical College, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Hongyan Li
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Ziyang Zhu
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Xiaojuan Huang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Department of Nuclear Medicine, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310000, China
| | - Chengpeng Gong
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Yu Gao
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Rong Guo
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Biao Yang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Chenyang Wang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Dawei Jiang
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Xiaoli Lan
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China.,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China
| | - Rui An
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China. .,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China.
| | - Zairong Gao
- Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Ave, Wuhan, 430022, China. .,Hubei Key Laboratory of Molecular Imaging, Wuhan, 430022, China.
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7
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Lai L, Wang Y, Peng S, Guo W, Li F, Xu S. P53 and taurine upregulated gene 1 promotes the repair of the DeoxyriboNucleic Acid damage induced by bupivacaine in murine primary sensory neurons. Bioengineered 2022; 13:7439-7456. [PMID: 35271399 PMCID: PMC9208530 DOI: 10.1080/21655979.2022.2048985] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The research aimed to explore the biological role of p53 protein and long non-coding RNA (lncRNA) taurine upregulated gene 1 (TUG1) in bupivacaine (bup)-induced neurotoxicity. Our work treated dorsal root ganglion (DRG) cells with bup, detected cell viability through CCK-8, apoptosis through TUNEL assays, DeoxyriboNucleic Acid (DNA) damage through γ-H2AX protein and comet assay, including p53 mRNA, protein and TUG1 expression through q-PCR and western blot, furthermore, cell viability and DNA damage were determined after the silencing of p53 and TUG1, biological information and TUG1 FISH combined with p53 protein immunofluorescence (IF) was performed to determine the cellular localization of these molecule. In vivo experiments, we explored the impact of intrathecal injection of bup on p53 mRNA and protein, TUG1, γ-H2AX protein expression. The results showed that bup was available to signally decreased cell viability, promoted apoptosis rate and DNA damage, additionally, bup increased p53 mRNA and protein and TUG1 expression. P53 siRNA and TUG1 siRNA significantly increased DNA damage. Furthermore, bioinformatics analysis and colocalization experiments revealed that the p53 protein is a transcription factor of TUG1, in vivo experiment, intrathecal injection of bup increased the p53 mRNA, p53 protein, TUG1 and γ-H2AX protein in the murine DRG. In this study, it was found p53 and TUG1 promote the repair of the DNA damage induced by bup in murine dorsal root ganglion cells, suggesting a new strategy for the amelioration of bup-induced neurotoxicity.
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Affiliation(s)
- Luying Lai
- Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Yongwei Wang
- Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Shenghui Peng
- Department of Rehabilitation, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Wenjing Guo
- Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Fengxian Li
- Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
| | - Shiyuan Xu
- Department of Anesthesiology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong Province, China
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8
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Zhang T, Mo Z, Duan G, Tang R, Zhang F, Lu M. 125I Seed Promotes Apoptosis in Non-small Lung Cancer Cells via the p38 MAPK-MDM2-p53 Signaling Pathway. Front Oncol 2021; 11:582511. [PMID: 33968713 PMCID: PMC8096899 DOI: 10.3389/fonc.2021.582511] [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: 07/12/2020] [Accepted: 02/19/2021] [Indexed: 12/27/2022] Open
Abstract
Purpose: 125I seeds were effective in the treatment of non-small cell lung cancer in previous research. However, the exact signaling pathway-mediated apoptosis mechanism is still unclear. The present study analyzed the effects and potential mechanisms of 125I seed on the growth and migration of A549 cells. Methods: Lung cancer A549 cells were irradiated with 125I seed for various times. MTT, invasion assay, and flow cytometry were used to detect the proliferation, invasion, and apoptosis of treated cells, respectively. A Nimblegen genome-wide expression profile chip was used to evaluate gene expression changes in 125I seed-treated A549 cells. Validation studies were performed using phosphorylated protein chip technology, Western blot, nude mouse tumor xenograft assay, and immunohistochemical experiments. All statistical analyses were performed using unpaired Student's t tests and Kruskal-Wallis test. Results: Irradiation with 125I seed inhibited A549 cell proliferation and invasion and induced apoptosis (primarily early apoptosis). Irradiation with 125I seed also caused the downregulation of p38MAPK, degradation of mouse double-minute 2 homolog (MDM2), and higher expression of p53, which eventually resulted in non-small cell lung cancer cell apoptosis. Conclusion: 125I seed irradiation activated the p38MAPK/MDM2/p53 signaling pathway and promoted non-small cell lung cancer cell apoptosis. Future clinical studies targeting this signal may provide a new potential therapeutic approach for non-small cell lung cancer.
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Affiliation(s)
- Tao Zhang
- Department of Radiology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
| | - ZhiQiang Mo
- Department of Interventional Radiology, Guangdong Provinical People's Hospital, Guangzhou, China
| | - Guangfeng Duan
- Department of Radiology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
| | - Rijie Tang
- Department of Radiology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
| | - Fujun Zhang
- Department of Medical Imaging & Interventional Radiology, Cancer Center and State Key Laboratory of Oncology in South China, Sun Yat-sen University, Guangzhou, China
| | - Mingjian Lu
- Department of Radiology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
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9
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Tripathy D, Upadhyay R, Singh CS, Boruah N, Mandal N, Chatterjee A. Mitigation of X-ray induced DNA damages and expression of DNA-repair genes by antioxidative Potentilla fulgens root extract and its ethyl-acetate fraction in mammalian cells. Mutagenesis 2021; 36:165-175. [PMID: 33693790 DOI: 10.1093/mutage/geab009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Accepted: 03/04/2021] [Indexed: 11/13/2022] Open
Abstract
Potentilla fulgens is a medicinal plant in North-East India whose root is reported to have anti-diabetic, anticarcinogenic and antioxidant properties. The potential of hydro-alcoholic extract of P. fulgens root (PRE) for providing protection to mammalian cells exposed to ionising radiation was investigated in this study. The methanolic extract of PRE shows an enhanced radical scavenging ability in a concentration dependent manner. PRE-pre-treatment to stimulated human blood lymphocytes (HBLs) reduced the frequency of deletion and exchange aberrations induced by X-irradiation. Similar protection of chromosome aberrations was also observed in mouse bone marrow cells (BMCs) where mice were given PRE extract (1 mg extract/day/mice) ad libitum in the drinking water for 45 days before whole-body X-irradiation. Of the various extracts prepared by partitioning of the methanol extract, the ethyl-acetate (EA) fraction was found to possess better antioxidant, radical scavenging and DNA-damage reduction activities. PRE-pre-treatment also reduced the radiation-induced cell-cycle delay effectively in HBL. In HEK-293 cells, PRE reduced radiation-induced G2-block in cell kinetics. Interestingly, PRE-treatment alone increased the concentration of endogenous glutathione (GSH) in mouse BMC and in stimulated HBL along with the elevated expression of γ-glutamyl-cysteine synthetase heavy/catalytic subunit, a key determinant of GSH synthesis. Studies on expression of two DNA-repair genes revealed that there was a marked increase in the expression of GADD45 and H2AX genes after X-irradiation in stimulated HBL, and such expression was reduced significantly if PRE-treatment was given prior to radiation. The present findings show the ability of PRE to reduce radiation-induced DNA damages probably by free radical scavenging whereas modulation of expression of DNA-repair genes' and endogenous GSH-increment emerge as effective strategies. The present study is the first report on the selected medicinal plant species that suggests it to be a potential natural radioprotector when used as root extract or its EA fraction for mitigating radiation toxicity.
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Affiliation(s)
- Debabrata Tripathy
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, India
| | - Ravi Upadhyay
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, India
| | - Chongtham Sovachandra Singh
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, India
| | - Nabamita Boruah
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, India
| | - Nripendranath Mandal
- Division of Molecular Medicine, Bose Institute, CIT Scheme VII M, Kolkata, India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, India
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10
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Cohen E, Pena S, Mei C, Bracho O, Marples B, Elsayyad N, Goncalves S, Ivan M, Monje PV, Liu XZ, Fernandez-Valle C, Telischi F, Dinh CT. Merlin-Deficient Schwann Cells Are More Susceptible to Radiation Injury than Normal Schwann Cells In Vitro. Skull Base Surg 2021; 83:228-236. [DOI: 10.1055/s-0040-1722283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 10/29/2020] [Indexed: 10/22/2022]
Abstract
Abstract
Objectives Vestibular schwannomas (VS) are intracranial tumors, which are caused by NF2 gene mutations that lead to loss of merlin protein. A treatment for VS is stereotactic radiosurgery, a form of radiation. To better understand the radiobiology of VS and radiation toxicity to adjacent structures, our main objectives were (1) investigate effects of single fraction (SF) radiation on viability, cytotoxicity, and apoptosis in normal Schwann cells (SCs) and merlin-deficient Schwann cells (MD-SCs) in vitro, and (2) analyze expression of double strand DNA breaks (γ-H2AX) and DNA repair protein Rad51 following irradiation.
Study Design This is a basic science study.
Setting This study is conducted in a research laboratory.
Participants Patients did not participate in this study.
Main Outcome Measures In irradiated normal SCs and MD-SCs (0–18 Gy), we measured (1) viability, cytotoxicity, and apoptosis using cell-based assays, and (2) percentage of cells with γ-H2AX and Rad51 on immunofluorescence.
Results A high percentage of irradiated MD-SCs expressed γ-H2AX, which may explain the dose-dependent losses in viability in rodent and human cell lines. In comparison, the viabilities of normal SCs were only compromised at higher doses of radiation (>12 Gy, human SCs), which may be related to less Rad51 repair. There were no further reductions in viability in human MD-SCs beyond 9 Gy, suggesting that <9 Gy may be insufficient to initiate maximal tumor control.
Conclusion The MD-SCs are more susceptible to radiation than normal SCs, in part through differential expression of γ-H2AX and Rad51. Understanding the radiobiology of MD-SCs and normal SCs is important for optimizing radiation protocols to maximize tumor control while limiting radiation toxicity in VS patients.
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Affiliation(s)
- Erin Cohen
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Stefanie Pena
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Christine Mei
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Olena Bracho
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Brian Marples
- Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Nagy Elsayyad
- Department of Radiation Oncology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Stefania Goncalves
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Michael Ivan
- Department of Neurological Surgery, Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Paula V. Monje
- Department of Neurological Surgery, Indiana University School of Medicine, Indianapolis, Indiana, United States
- Stark Neuroscience Research Institute, Indiana University School of Medicine, Indianapolis, Indiana, United States
| | - Xue-Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Cristina Fernandez-Valle
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine, Miami, Florida, United States
| | - Fred Telischi
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
| | - Christine T. Dinh
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, Florida, United States
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11
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Shin E, Lee S, Kang H, Kim J, Kim K, Youn H, Jin YW, Seo S, Youn B. Organ-Specific Effects of Low Dose Radiation Exposure: A Comprehensive Review. Front Genet 2020; 11:566244. [PMID: 33133150 PMCID: PMC7565684 DOI: 10.3389/fgene.2020.566244] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 09/07/2020] [Indexed: 12/16/2022] Open
Abstract
Ionizing radiation (IR) is a high-energy radiation whose biological effects depend on the irradiation doses. Low-dose radiation (LDR) is delivered during medical diagnoses or by an exposure to radioactive elements and has been linked to the occurrence of chronic diseases, such as leukemia and cardiovascular diseases. Though epidemiological research is indispensable for predicting and dealing with LDR-induced abnormalities in individuals exposed to LDR, little is known about epidemiological markers of LDR exposure. Moreover, difference in the LDR-induced molecular events in each organ has been an obstacle to a thorough investigation of the LDR effects and a validation of the experimental results in in vivo models. In this review, we summarized the recent reports on LDR-induced risk of organ-specifically arranged the alterations for a comprehensive understanding of the biological effects of LDR. We suggested that LDR basically caused the accumulation of DNA damages, controlled systemic immune systems, induced oxidative damages on peripheral organs, and even benefited the viability in some organs. Furthermore, we concluded that understanding of organ-specific responses and the biological markers involved in the responses is needed to investigate the precise biological effects of LDR.
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Affiliation(s)
- Eunguk Shin
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Sungmin Lee
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Hyunkoo Kang
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Jeongha Kim
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Kyeongmin Kim
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - HyeSook Youn
- Department of Integrative Bioscience and Biotechnology, Sejong University, Seoul, South Korea
| | - Young Woo Jin
- Laboratory of Low Dose Risk Assessment, National Radiation Emergency Medical Center, Korea Institute of Radiological & Medical Sciences, Seoul, South Korea
| | - Songwon Seo
- Laboratory of Low Dose Risk Assessment, National Radiation Emergency Medical Center, Korea Institute of Radiological & Medical Sciences, Seoul, South Korea
| | - BuHyun Youn
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea.,Department of Biological Sciences, Pusan National University, Busan, South Korea
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12
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Mitigative efficacy of the clinical dosage administration of granulocyte colony-stimulating factor and romiplostim in mice with severe acute radiation syndrome. Stem Cell Res Ther 2020; 11:339. [PMID: 32746943 PMCID: PMC7398212 DOI: 10.1186/s13287-020-01861-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/12/2020] [Accepted: 07/28/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND It has been reported that the high-dosage administration of domestically approved pharmaceutical drugs, especially granulocyte colony-stimulating factor (G-CSF) and romiplostim (RP), is a rapid and appropriate medical treatment for preventing severe acute radiation syndrome (ARS) of victims exposed to lethal total-body irradiation (TBI). However, it remains unclear whether or not the clinical dosage administration of these drugs can ameliorate TBI-induced ARS and related high mortality in order to find various drug treatment options and less toxic optimum protocol depending on the situation surrounding the radiological accidents. METHODS We assessed the clinical dosage administration in combination with G-CSF and RP as intraperitoneal injection in C57BL/6 J mice exposed to more than 7-Gy lethal dose of X-ray TBI for the survival study evaluated by the log-rank test. Bone marrow and splenic cells were collected on the 21st day, when 1 week has passed from last administration, to detect the level of cell apoptosis, intracellular reactive oxygen species (ROS), and nuclear factor erythroid 2-related factor 2 (Nrf2)-related anti-oxidative gene expressions, and enzyme-linked immune sorbent assay using sera was performed for cell senescence and inflammation status analyzed with one-way ANOVA and Tukey-Kramer or Bonferroni/Dunn multiple comparison tests. RESULTS The combined once-daily administration of 10 μg/kg G-CSF for 4 times and 10 μg/kg RP once a week for 3 times improve the 30-day survival rate of lethal TBI mice compared with untreated TBI mice, accompanied by a gradual increase in the body weight and hematopoietic cell numbers. The radio-mitigative effect is probably attributed to the scavenging of ROS and the reduction in cell apoptosis. These changes were associated with the upregulation of Nrf2 and its downstream anti-oxidative targets in TBI mice. Furthermore, this combination modulated TBI-induced cell senescence an d inflammation markers. CONCLUSIONS This study suggested that the clinical dosage administration in combination with G-CSF and RP may also have radio-mitigative effects on mice exposed to lethal TBI and may be a potent therapeutic agent for mitigating radiation-induced severe ARS.
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13
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Wang F, Guo S, Li P. Two novel mutations in the MCM8 gene shared by two Chinese siblings with primary ovarian insufficiency and short stature. Mol Genet Genomic Med 2020; 8:e1396. [PMID: 32652893 PMCID: PMC7507566 DOI: 10.1002/mgg3.1396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 06/02/2020] [Accepted: 06/08/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Minichromosome maintenance complex component 8 (MCM8) is responsible for homologous recombination and DNA double-strand breaks (DSBs) repair and is the cause of primary ovarian insufficiency (POI), which is seldom diagnosed in adolescents and children. METHODS Whole-exome sequencing was performed in a 13-year-old girl, and Sanger sequencing was used to identify potentially pathogenic variants in her sister (aged 6 years and 7 months) and parents. To identify potential pathogenic mutations, DSBs were induced by mitomycin C (MMC), and the DNA repair capacity was evaluated by the histone H2AX phosphorylation level. RESULTS Two novel mutations of MCM8, i.e., c.724T>C (p.C242R) and c.1334C>A (p.S445*), were identified in a 13-year-old girl with POI who exhibited disappeared bilateral ovaries and short stature (height standard difference score [HtSDS] = -3.05), and her sister (aged 6 years and 7 months) with progressive POI whose ovary size decreased from normal to unclear and height growth gradually slowed. In the functional experiments, compared with the wild-type, HeLa cells overexpressing mutant p.C242R and p.S445* showed a higher sensitivity to MMC. Furthermore, the mutant p.S445* has a more deleterious effect on DNA damage repair. CONCLUSION Our results reveal that affected children with the novel pathogenetic mutations p.C242R and p.S445* in the MCM8 gene are characterized by POI, short stature, cancer susceptibility, and genomic instability.
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Affiliation(s)
- Fei Wang
- Department of Endocrinology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Sheng Guo
- Department of Endocrinology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Pin Li
- Department of Endocrinology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai, China
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14
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Isobaric tags for relative and absolute quantitation-based quantitative proteomic analysis of X-linked inhibitor of apoptosis and H2AX in etoposide-induced renal cell carcinoma apoptosis. Chin Med J (Engl) 2020; 132:2941-2949. [PMID: 31855962 PMCID: PMC6964936 DOI: 10.1097/cm9.0000000000000553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background: X-linked inhibitor of apoptosis (XIAP) is a vital factor in the anti-apoptosis mechanism of tumors and is highly expressed in renal cell carcinoma (RCC). However, the mechanism through which XIAP regulates DNA damage repair is unknown. This study investigated the regulatory mechanism of XIAP in etoposide-induced apoptosis in two Caki-1 cell lines with high or low XIAP expression. Methods: The two cell lines were established using RNA interference technology. The differentially expressed proteins in the two cell lines were globally analyzed through an isobaric tags for relative and absolute quantitation-based quantitative proteomics approach. Proteomic analysis revealed 255, 375, 362, and 5 differentially expressed proteins after 0, 0.5, 3, and 12 h of drug stimulation, respectively, between the two cell lines. The identified differentially expressed proteins were involved in numerous biological processes. In addition, the expression of histone proteins (H1.4, H2AX, H3.1, H3.2, and H3.3) was drastically altered, and the effects of XIAP silencing were accompanied by the marked downregulation of H2AX. Protein-protein interactions were assessed and confirmed through immunofluorescence and Western blot analyses. Results: The results suggested that XIAP may act as a vital cell signal regulator that regulates the expression of DNA repair-related proteins, such as H2AX, and influences the DNA repair process. Conclusions: Given these functions, XIAP may be the decisive factor in determining the sensitivity of RCC cell apoptosis induction in response to chemotherapeutic agents.
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15
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J J B, S M J M. Poor Understanding of Radiation Profiles in Deep Space Causes Inaccurate Findings and Misleading Conclusions. J Biomed Phys Eng 2019; 9:587-588. [PMID: 31750273 PMCID: PMC6820022 DOI: 10.31661/jbpe.v0i0.1021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 10/20/2018] [Indexed: 11/16/2022]
Abstract
The radiation environment in deep space, where astronauts are behind the shelter provided by the Earth's magnetosphere, is a major health concern. Galactic cosmic rays (GCR) and solar particle events (SPE) are two basic sources of space radiation in the solar system. The health risks of exposure to high levels of space radiation can be observed either as acute and delayed effects. Zhang et al. in their recently published paper entitled "γ-H2AX responds to DNA damage induced by long-term exposure to combined low-dose-rate neutron and γ-ray radiation" have addressed the effects of different cumulative radiation doses on peripheral blood cell, subsets of T cells of peripheral blood lymphocytes and DNA damage repair. These researchers exposed animals to low dose rate 60Co-rays at 0.0167 Gy h-1for 2 h/d and 252Cf neutrons at 0.028 mGy h-1for 20 h/d for 15, 30, or 60 consecutive days. They reported that the mRNA of H2AX increased significantly, and showed a positive correlation with dose. Despite strengths, this paper has several shortcomings such as poor definition of low dose radiation as well as space and reactor radiation environments. Another shortcoming of this paper comes from this point that blood cell studies do not represent the biological effects of ionizing radiation on the total body. Moreover, the effects of the human immune system and DNA repair mechanisms are not included in the study. The role of pre-exposures and induction of adaptive response phenomena in decreasing the risk of radiation in deep space missions are also ignored.
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Affiliation(s)
- Bevelacqua J J
- PhD,Bevelacqua Resources, 343 Adair Drive, Richland, WA 99352, USA
| | - Mortazavi S M J
- PhD,Medical Physics Department, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
- PhD, Diagnostic Imaging Department, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111, USA
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16
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The Impact of Dose Rate on DNA Double-Strand Break Formation and Repair in Human Lymphocytes Exposed to Fast Neutron Irradiation. Int J Mol Sci 2019; 20:ijms20215350. [PMID: 31661782 PMCID: PMC6862539 DOI: 10.3390/ijms20215350] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 10/16/2019] [Accepted: 10/19/2019] [Indexed: 12/12/2022] Open
Abstract
The lack of information on how biological systems respond to low-dose and low dose-rate exposures makes it difficult to accurately assess the carcinogenic risks. This is of critical importance to space radiation, which remains a serious concern for long-term manned space exploration. In this study, the γ-H2AX foci assay was used to follow DNA double-strand break (DSB) induction and repair following exposure to neutron irradiation, which is produced as secondary radiation in the space environment. Human lymphocytes were exposed to high dose-rate (HDR: 0.400 Gy/min) and low dose-rate (LDR: 0.015 Gy/min) p(66)/Be(40) neutrons. DNA DSB induction was investigated 30 min post exposure to neutron doses ranging from 0.125 to 2 Gy. Repair kinetics was studied at different time points after a 1 Gy neutron dose. Our results indicated that γ-H2AX foci formation was 40% higher at HDR exposure compared to LDR exposure. The maximum γ-H2AX foci levels decreased gradually to 1.65 ± 0.64 foci/cell (LDR) and 1.29 ± 0.45 (HDR) at 24 h postirradiation, remaining significantly higher than background levels. This illustrates a significant effect of dose rate on neutron-induced DNA damage. While no significant difference was observed in residual DNA damage after 24 h, the DSB repair half-life of LDR exposure was slower than that of HDR exposure. The results give a first indication that the dose rate should be taken into account for cancer risk estimations related to neutrons.
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17
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Zare T, Fardid R, Naderi S. Synergetic Effect of Silver Nanoparticles and UVC Irradiation on H2AX Gene Expression in TK6 Cells. CELL JOURNAL 2019; 21:204-209. [PMID: 30825294 PMCID: PMC6397600 DOI: 10.22074/cellj.2019.5898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/24/2018] [Indexed: 11/04/2022]
Abstract
OBJECTIVE The use of nanoscale particles, for instance silver nanoparticles (Ag NPs) has considerably increased recently. Since Ag NPs can be transmuted into silver ions; the toxicity and genotoxicity of these NPs along with other external factors such as ultraviolet type C (UVC) irradiation must be evaluated. In the present study, the aim was to investigate the genotoxic effects Ag NPs and UVC co-exposure on human lymphoblastoid TK6 cells. MATERIALS AND METHODS In this experimental study, Ag NPs (~20 nm) were purchased from US Research Nanomaterials Inc. and H2AX gene expression was evaluated using quantitative real time polymerase chain reaction (qRT-PCR), 1 and 24 hours post Ag NPs and UVC treatment. RESULTS Results showed that treatment of TK6 cells with different Ag NP concentrations without exposure to UVC can reduce H2AX gene expression, but treatment of these cells with Ag NPs in combination UVC irradiation can reduce viability that leads to a synergistic increase in the amount of H2AX gene expression. CONCLUSION According to our findings, Ag NPs can act to sensitize cells to UVC radiation when used for cancer treatment. So, combination of Ag NPs and UVC irradiation could be used in radiotherapy.
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Affiliation(s)
- Tahereh Zare
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Fardid
- Department of Radiology, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. electronic address:
- Ionizing and Non-Ionizing Radiation Protection Research Center (INIRPRC), Shiraz University of Medical Sciences, Shiraz, Iran
| | - Samaneh Naderi
- Diagnostic Laboratory Sciences and Technology Research Center, School of Paramedical Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
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18
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Yamaguchi M, Hirouchi T, Yoshioka H, Watanabe J, Kashiwakura I. Diverse functions of the thrombopoietin receptor agonist romiplostim rescue individuals exposed to lethal radiation. Free Radic Biol Med 2019; 136:60-75. [PMID: 30926566 DOI: 10.1016/j.freeradbiomed.2019.03.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 03/22/2019] [Accepted: 03/22/2019] [Indexed: 01/03/2023]
Abstract
In cases of radiological accidents, especially victims exposed to high-dose ionizing radiation, the administration of appropriate approved pharmaceutical drugs is the most rapid medical treatment. However, currently, there are no suitable candidates. The thrombopoietin receptor (TPOR) agonist romiplostim (RP) is a therapeutic agent for immune thrombocytopenia and has potential to respond to such victims. Here, we show that RP administration in mice exposed to lethal-dose radiation leads not only to the promotion of haematopoiesis in multiple organs, including the lungs but also a reduction in damage to organs and cells. RP also causes a rapid increase in the number of mesenchymal stem cells in the spleen. In addition, RP suppresses the expression of several miRNAs involved in radiation-induced leukemogenesis, suggesting the presence of targets other than TPOR. Among the currently approved pharmaceutical drugs, RP is the most suitable candidate for victims exposed to high-dose ionizing radiation.
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Affiliation(s)
- Masaru Yamaguchi
- Department of Radiation Science, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - Tokuhisa Hirouchi
- Department of Radiobiology, Institute for Environmental Sciences, 2-121 Hacchazawa, Takahoko, Rokkasho-vil. Kamikita-gun, Aomori, 039-3213, Japan
| | - Haruhiko Yoshioka
- Department of Bioscience and Laboratory Medicine, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - Jun Watanabe
- Department of Bioscience and Laboratory Medicine, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan
| | - Ikuo Kashiwakura
- Department of Radiation Science, Hirosaki University Graduate School of Health Sciences, 66-1 Hon-cho, Hirosaki, Aomori, 036-8564, Japan.
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19
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Zong Z, Hua L, Wang Z, Xu H, Ye C, Pan B, Zhao Z, Zhang L, Lu J, Mei LH, Rutong Y. Self-assembled angiopep-2 modified lipid-poly (hypoxic radiosensitized polyprodrug) nanoparticles delivery TMZ for glioma synergistic TMZ and RT therapy. Drug Deliv 2019; 26:34-44. [PMID: 30744436 PMCID: PMC6394306 DOI: 10.1080/10717544.2018.1534897] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The addition of temozolomide (TMZ) to radiotherapy (RT) improves survival of patients with glioblastoma (GBM). However, TMZ + RT causes excess toxicity in patients. In this study, we prepared angiopep-2 (A2) modified lipid-poly (hypoxic radiosensitized polyprodrug) nanoparticles for TMZ delivery (A2-P(MIs)25/TMZ) to achieve synergistic effects against glioma. This A2-P(MIs)25/TMZ display highly promising advantages: (1) a hydrophobic P-(MIs)25 core where poorly water-soluble TMZ can be encapsulated; (2) nitro groups of the hydrophobic P-(MIs)25 core that are converted into hydrophilic amino groups (P(NH2s)25) under low oxygen conditions to mimic the oxygen-increased sensitization to RT; (3) a lipid monolayer at the interface of the core and the shell to modify the A2 (a specific ligand for low-density lipoprotein receptor-related protein-1 (LRP-1), which are expressed in the blood-brain barrier (BBB) and human glioma cells), thereby enhancing the drug encapsulation efficiency in glioma. These nanoparticles appear as a promising and robust nanoplatforms for TMZ and hypoxic cell radiosensitization delivery.
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Affiliation(s)
- Zhenkun Zong
- a Nanjing Medical University , Nanjing , China.,b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China.,c Department of Neurosurgery , Affiliated Hospital of Xuzhou Medical University , Xuzhou , China
| | - Lei Hua
- a Nanjing Medical University , Nanjing , China.,b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China.,c Department of Neurosurgery , Affiliated Hospital of Xuzhou Medical University , Xuzhou , China
| | - Zhen Wang
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China
| | - Haoyue Xu
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China
| | - Chengkun Ye
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China
| | - Bomin Pan
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China
| | - Zongren Zhao
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China
| | - Longzhen Zhang
- d Department of Radiation Oncology , Affiliated Hospital of Xuzhou Medical University , Xuzhou , China
| | - Jun Lu
- e Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province School of Life Science , Jiangsu Normal University , Xuzhou , China
| | - Liu Hong Mei
- b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China.,c Department of Neurosurgery , Affiliated Hospital of Xuzhou Medical University , Xuzhou , China.,f Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy , Cancer Institute, Xuzhou Medical University , Xuzhou , China
| | - Yu Rutong
- a Nanjing Medical University , Nanjing , China.,b Institute of Nervous System Diseases , Xuzhou Medical University , Xuzhou , China.,c Department of Neurosurgery , Affiliated Hospital of Xuzhou Medical University , Xuzhou , China.,f Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy , Cancer Institute, Xuzhou Medical University , Xuzhou , China
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20
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Xu X, Zhang Y, Zhao S, Bian Y, Ning Y, Qin Y. Mutational analysis of theFAM175A gene in patients with premature ovarian insufficiency. Reprod Biomed Online 2019; 38:943-950. [PMID: 31000350 DOI: 10.1016/j.rbmo.2019.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 12/30/2018] [Accepted: 02/01/2019] [Indexed: 01/15/2023]
Abstract
RESEARCH QUESTION The family with sequence similarity 175 member A gene (FAM175A; also known as ABRAXAS1, CCDC98 and ABRA1), a member of the DNA repair family, contributes to the BRCA1 (BRCA1 DNA repair associated)-dependent DNA damage response and is associated with age at natural menopause. However, it remains poorly understood whether sequence variants in FAM175A are causative for premature ovarian insufficiency (POI). The aim of this study was to investigate whether mutations in the gene FAM175A were present in patients with POI. DESIGN A total of 400 women with idiopathic POI and 498 control women with regular menstruation (306 age-matched women and 192 women over 40 years old) were recruited. After Sanger sequencing of FAM175A, functional experiments were carried out to explore the deleterious effects of the identified variation. DNA damage was subsequently induced by mitomycin C (MMC), and DNA repair capacity and G2-M checkpoint activation were evaluated by examining the phosphorylation level of H2AX (H2A histone family, member X) and the percentage of mitotic cells, respectively. RESULTS One rare single-nucleotide polymorphism, rs755187051 in gene FAM175A, c.C727G (p.L243V), was identified in two patients but absent in the 498 controls. The functional experiments demonstrated that overexpression of variant p.L243V in HeLa cells resulted in a similar sensitivity to MMC-induced damage compared with cells transfected with wild-type FAM175A. Moreover, after treatment with MMC, there were no differences in DNA repair capacity and G2-M checkpoint activation between the mutant and wild-type genes. CONCLUSION Our results suggest that the p.L243V variant of FAM175A may not be causative for POI. The contribution of FAM175A to POI needs further exploration.
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Affiliation(s)
- Xiaofei Xu
- Centre for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China; Key Laboratory of Assisted Reproduction, Ministry of Education, Center of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
| | - Yingxin Zhang
- Department of Obstetrics and Gynecology, The Chinese University of Hong Kong, Hong Kong, China
| | - Shidou Zhao
- Centre for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Yuehong Bian
- Centre for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Yunna Ning
- Centre for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Yingying Qin
- Centre for Reproductive Medicine, Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China.
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Tharmalingam S, Sreetharan S, Brooks AL, Boreham DR. Re-evaluation of the linear no-threshold (LNT) model using new paradigms and modern molecular studies. Chem Biol Interact 2019; 301:54-67. [PMID: 30763548 DOI: 10.1016/j.cbi.2018.11.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/13/2018] [Accepted: 11/22/2018] [Indexed: 02/06/2023]
Abstract
The linear no-threshold (LNT) model is currently used to estimate low dose radiation (LDR) induced health risks. This model lacks safety thresholds and postulates that health risks caused by ionizing radiation is directly proportional to dose. Therefore even the smallest radiation dose has the potential to cause an increase in cancer risk. Advances in LDR biology and cell molecular techniques demonstrate that the LNT model does not appropriately reflect the biology or the health effects at the low dose range. The main pitfall of the LNT model is due to the extrapolation of mutation and DNA damage studies that were conducted at high radiation doses delivered at a high dose-rate. These studies formed the basis of several outdated paradigms that are either incorrect or do not hold for LDR doses. Thus, the goal of this review is to summarize the modern cellular and molecular literature in LDR biology and provide new paradigms that better represent the biological effects in the low dose range. We demonstrate that LDR activates a variety of cellular defense mechanisms including DNA repair systems, programmed cell death (apoptosis), cell cycle arrest, senescence, adaptive memory, bystander effects, epigenetics, immune stimulation, and tumor suppression. The evidence presented in this review reveals that there are minimal health risks (cancer) with LDR exposure, and that a dose higher than some threshold value is necessary to achieve the harmful effects classically observed with high doses of radiation. Knowledge gained from this review can help the radiation protection community in making informed decisions regarding radiation policy and limits.
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Affiliation(s)
- Sujeenthar Tharmalingam
- Northern Ontario School of Medicine, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON, P3E 2C6, Canada.
| | - Shayenthiran Sreetharan
- Department of Medical Physics and Applied Radiation Sciences, McMaster University, 1280 Main Street W, Hamilton ON, L8S 4K1, Canada
| | - Antone L Brooks
- Environmental Science, Washington State University, Richland, WA, USA
| | - Douglas R Boreham
- Northern Ontario School of Medicine, Laurentian University, 935 Ramsey Lake Rd, Sudbury, ON, P3E 2C6, Canada; Bruce Power, Tiverton, ON(3), UK.
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22
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Trajkova K, Dilevska I, Petkovska R, Trajkov D, Kroneis T, Schwinger W, Sorantin E. The influence of the iodinate contrast medium during CT: Single center experience - Development of two competitive in-house methods for automated quantification of DDSB. MAKEDONSKO FARMACEVTSKI BILTEN 2019. [DOI: 10.33320/maced.pharm.bull.2019.65.01.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
DNA damage induced by ionizing radiation may ultimately lead to cell death or initiate cancer cells development. Today it is difficult to estimate what the actual damage to the human body will be, given the fact that today in the world the number of diagnostic procedures using radiation and iodine contrast media is increasing, and the existence of a number of factors that can affect the radiation dose in vivo. At the same time, development of new methods is required, which can determine in a much shorter time what will be the effect of diagnostic radiation on the DNA molecule. For these purposes we develop two competitive inhouse methods for automated quantification of DNA double strand brakes (DDSB) in peripheral blood lymphocytes: immunofluorescence determining of γH2AX with stained microscopic slides and determining the occurrence of DDSB with the flow cytometry. Our initial results shown that computed tomography (CT) can cause damage in the DNA molecule in the form of DDSB, the existence of linear dependence with the increase in low and high range of CTDI and the number of γH2AX, and that iodine contrast media can increase the occurrence of DNA double strand brakes.
Keywords: CT examinations, ICM, immunofluorescence, flow cytometry, DDSB
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Affiliation(s)
- Klimentina Trajkova
- Division of Pediatric Radiology, Department of Radiology, Medical University Graz, Auenbruggerplatz 34 A – 8036, 8010 Graz, Austria
| | - Ivana Dilevska
- Division of Pediatric Radiology, Department of Radiology, Medical University Graz, Auenbruggerplatz 34 A – 8036, 8010 Graz, Austria
| | - Rumenka Petkovska
- Institute of Applied Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy, Ss. Cyril and Methodius University, Majka Tereza 47, 1000 Skopje, Republic of North Macedonia
| | - Dejan Trajkov
- Division of Pediatric Radiology, Department of Radiology, Medical University Graz, Auenbruggerplatz 34 A – 8036, 8010 Graz, Austria
| | - Thomas Kroneis
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
| | - Wolfgang Schwinger
- Division of pediatric hematology/oncology, Department of Paediatrics and Adolescent Medicine, Medical University Graz, Auenbruggerplatz 34/2 – 8036, 8010 Graz, Austria
| | - Erich Sorantin
- Division of Pediatric Radiology, Department of Radiology, Medical University Graz, Auenbruggerplatz 34 A – 8036, 8010 Graz, Austria
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Hua L, Wang Z, Zhao L, Mao H, Wang G, Zhang K, Liu X, Wu D, Zheng Y, Lu J, Yu R, Liu H. Hypoxia-responsive lipid-poly-(hypoxic radiosensitized polyprodrug) nanoparticles for glioma chemo- and radiotherapy. Theranostics 2018; 8:5088-5105. [PMID: 30429888 PMCID: PMC6217062 DOI: 10.7150/thno.26225] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 09/19/2018] [Indexed: 02/06/2023] Open
Abstract
Treatment of malignant glioma is a challenge facing cancer therapy. In addition to surgery, and chemotherapy, radiotherapy (RT) is one of the most effective modalities of glioma treatment. However, there are two crucial challenges for RT facing malignant glioma therapy: first, gliomas are known to be resistant to radiation due to their intratumoral hypoxia; second, radiosensitizers may exhibit a lack of target specificity, which may cause a lower concentration of radiosensitizers in tumors and toxic side effects in normal tissues. Thus, novel angiopep-2-lipid-poly-(metronidazoles)n (ALP-(MIs)n) hypoxic radiosensitizer-polyprodrug nanoparticles (NPs) were designed to enhance the radiosensitizing effect on gliomas. Methods: In this study, different degrees and biodegradabilites of hypoxic radiosensitizer MIs-based polyprodrug (P-(MIs)n) were synthesized as a hydrophobic core. P-(MIs)n were mixed with DSPE-PEG2000, angiopep-2-DSPE-PEG2000 and lecithin to self-assemble ALP-(MIs)n through a single-step nanoprecipitation method. The ALP-(MIs)n encapsulate doxorubicin (DOX) (ALP-(MIs)n/DOX) and provoke the release of DOX under hypoxic conditions for glioma chemo- and radiotherapy. In vivo glioma targeting was tested in an orthotopic glioma using live animal fluorescence/bioluminescence imaging. The effect on sensitization to RT of ALP-(MIs)n and the combination of chemotherapy and RT of ALP-(MIs)n/DOX for glioma treatment were also investigated both in vitro and in vivo. Results: ALP-(MIs)n/DOX effectively accumulated in gliomas and could reach the hypoxic glioma site after systemic in vivo administration. These ALP-(MIs)n showed a significant radiosensitizing effect on gliomas and realized combination chemotherapy and RT for glioma treatment both in vitro and in vivo. Conclusions: In summary, we constructed a lipid-poly-(hypoxic radiosensitized polyprodrug) nanoparticles for enhancing the RT sensitivity of gliomas and achieving the combination of radiation and chemotherapy for gliomas.
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Khan K, Tewari S, Awasthi NP, Mishra SP, Agarwal GR, Rastogi M, Husain N. Flow cytometric detection of gamma-H2AX to evaluate DNA damage by low dose diagnostic irradiation. Med Hypotheses 2018; 115:22-28. [DOI: 10.1016/j.mehy.2018.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/14/2018] [Accepted: 03/25/2018] [Indexed: 01/25/2023]
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Liu H, Cai Y, Zhang Y, Xie Y, Qiu H, Hua L, Liu X, Li Y, Lu J, Zhang L, Yu R. Development of a Hypoxic Radiosensitizer-Prodrug Liposome Delivery DNA Repair Inhibitor Dbait Combination with Radiotherapy for Glioma Therapy. Adv Healthc Mater 2017; 6. [PMID: 28371526 DOI: 10.1002/adhm.201601377] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/19/2017] [Indexed: 12/21/2022]
Abstract
Gliomas are highly radioresistant tumors, mainly due to hypoxia in the core region of the gliomas and efficient DNA double-strand break repair. However, the design of a radiosensitizer incorporating the two above mechanisms is difficult and has rarely been reported. Thus, this study develops a hypoxic radiosensitizer-prodrug liposome (MLP) to deliver the DNA repair inhibitor Dbait (MLP/Dbait) to achieve the simultaneous entry of radiosensitizers with two different mechanisms into the glioma. MLP/Dbait effectively sensitizes glioma cells to X-ray radiotherapy (RT). Histological and microscopic examinations of dissected brain tissue confirm that MLP effectively delivers Dbait into the glioma. Furthermore, the combination of MLP/Dbait with RT significantly inhibits growth of the glioma, as assessed by in vivo bioluminescence imaging. These findings suggest that MLP is a promising candidate as a Dbait delivery system to enhance the effect of RT on glioma, owing to the synergistic effects of the two different radiosensitizers.
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Affiliation(s)
- Hongmei Liu
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Yifan Cai
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Yafei Zhang
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Yandong Xie
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Hui Qiu
- Department of Radiation OncologyAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Cancer Institute of Xuzhou Medical University Xuzhou 221002 P. R. China
| | - Lei Hua
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Xuejiao Liu
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
| | - Yuling Li
- School of Chemistry and Chemical EngineeringJiangsu Normal University Xuzhou 221116 P. R. China
| | - Jun Lu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu ProvinceSchool of Life ScienceJiangsu Normal University Xuzhou 221116 Jiangsu Province P. R. China
| | - Longzhen Zhang
- Department of Radiation OncologyAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Cancer Institute of Xuzhou Medical University Xuzhou 221002 P. R. China
| | - Rutong Yu
- Brain HospitalAffiliated Hospital of Xuzhou Medical University Xuzhou 221000 China
- Institute of Nervous System DiseasesXuzhou Medical University Xuzhou Jiangsu 221002 P. R. China
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Xue XL, Han XD, Li Y, Chu XF, Miao WM, Zhang JL, Fan SJ. Astaxanthin attenuates total body irradiation-induced hematopoietic system injury in mice via inhibition of oxidative stress and apoptosis. Stem Cell Res Ther 2017; 8:7. [PMID: 28115023 PMCID: PMC5260077 DOI: 10.1186/s13287-016-0464-3] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Revised: 12/05/2016] [Accepted: 12/20/2016] [Indexed: 01/24/2023] Open
Abstract
Background The hematopoietic system is especially sensitive to total body irradiation (TBI), and myelosuppression is one of the major effects of TBI. Astaxanthin (ATX) is a powerful natural anti-oxidant with low toxicity. In this study, the effect of ATX on hematopoietic system injury after TBI was investigated. Methods Flow cytometry was used to detect the proportion of hematopoietic progenitor cells (HPCs) and hematopoietic stem cells (HSCs), the level of intracellular reactive oxygen species (ROS), expression of cytochrome C, cell apoptosis, and NRF2-related proteins. Immunofluorescence staining was used to detect Nrf2 translocation. Western blot analysis was used to evaluate the expression of apoptotic-related proteins. Enzymatic activities assay kits were used to analyze SOD2, CAT, and GPX1 activities. Results Compared with the TBI group, ATX can improve radiation-induced skewed differentiation of peripheral blood cells and accelerate hematopoietic self-renewal and regeneration. The radio-protective effect of ATX is probably attributable to the scavenging of ROS and the reduction of cell apoptosis. These changes were associated with increased activation of Nrf2 and downstream anti-oxidative proteins, and regulation of apoptotic-related proteins. Conclusions This study suggests that ATX could be used as a potent therapeutic agent to protect the hematopoietic system against TBI-induced bone marrow suppression.
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Affiliation(s)
- Xiao-Lei Xue
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China
| | - Xiao-Dan Han
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China
| | - Yuan Li
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China
| | - Xiao-Fei Chu
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China
| | - Wei-Min Miao
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300020, China
| | - Jun-Ling Zhang
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China.
| | - Sai-Jun Fan
- Tianjin Key Lab of Radiation Medicine and Molecular Nuclear Medicine, Institute of Radiation Medicine, Peking Union Medical College and Chinese Academy of Medical Sciences, Tianjin, 300192, China.
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Minichromosome maintenance complex component 8 mutations cause primary ovarian insufficiency. Fertil Steril 2016; 106:1485-1489.e2. [PMID: 27573988 DOI: 10.1016/j.fertnstert.2016.08.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/05/2016] [Accepted: 08/05/2016] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To investigate whether mutations in the minichromosome maintenance complex component 8 (MCM8) gene were present in 192 patients with sporadic primary ovarian insufficiency (POI). DESIGN Retrospective case-control cohort study. SETTING University-based reproductive medicine center. PATIENT(S) A total of 192 patients with sporadic POI and 312 control women with regular menstruation (192 age-matched women and 120 women >45 years old). INTERVENTION(S) Sanger sequencing was performed in patients with sporadic POI, and potentially pathogenic variants were confirmed in matched controls. DNA damage was induced by mitomycinC (MMC) treatment, and DNA repair capacity was evaluated by histone H2AX phosphorylation level. MAIN OUTCOME MEASURE(S) Sanger sequencing for MCM8 was performed in 192 patients with sporadic POI, and functional experiments were performed to explore the deleterious effects of mutations identified. RESULT(S) Two novel missense variants in MCM8, c. A950T (p. H317L), and c. A1802G (p. H601R), were identified in two patients with POI but absent in 312 controls (the upper 90% confidence limit for the proportion 2/192 is 2.24%). The HeLa cells overexpressing mutant p. H317L and p. H601R showed higher sensitivity to MMC compared with wild type. Furthermore, mutant p. H317L showed decreased repair capacity after MMC treatment with much more histone H2AX phosphorylation remaining after 2 hours of recovery. CONCLUSION(S) Our result suggests novel mutations p. H317L and p. H601R in the MCM8 gene are potentially causative for POI by dysfunctional DNA repair.
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