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Zhang K, Wu Z, Zhao Y, Qiu X, Li F, Chen Q, Cui F. LC3 Accelerated Brain-Lung Axis Abscopal Effects after Fractionated Whole-Brain Radiation by Promoting Motoneurons to Secrete Periostin. Radiat Res 2023; 200:462-473. [PMID: 37796808 DOI: 10.1667/rade-23-00075.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Accepted: 08/14/2023] [Indexed: 10/07/2023]
Abstract
The effect of autophagy on the radiation-induced bystander effect (RIBE) in vivo is unclear. Here, the whole brains of microtubule-associated protein 1A/1B-light chain 3 (LC3) and C57BL/6 (B6) mice were irradiated once (10 Gy)(IR1), given 3 fractions in three weeks (IR3), or 6 fractions in six weeks (IR6). The median survival of LC3 mice was 56.5 days, and that of B6 mice was 65 days after IR6. LC3 mice showed more congestion and fibrosis in the lung after the IR3 and IR6 irradiation protocols than B6 mice. Quantitative proteomics of serum samples and lung RNA sequencing of the LC3 group showed that the common most clustered pathway of the IR3 group was the elastic fiber formation pathway, which contained Periostin (POSTN). POSTN in the motoneurons increased with increasing number of radiation fractions in LC3 mice. A 1 μg/g POSTN neutralizing antibody reduced the lung fibrosis of LC3 mice exposed to IR3 by one-third, and significantly prolonged the survival time of LC3 mice exposed to IR6. LDN-214117 and LRRK2-in-1 were the best two of sixteen transforming growth factor-beta1 (TGF-β) receptor and autophagy mediators to decrease Postn mRNA. These data led us to conclude that LC3 accelerated motoneuron secretion of POSTN and aggravated the RIBE in the lung after brain irradiation.
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Affiliation(s)
- Ke Zhang
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Qidong People's Hospital/Affiliated Qidong Hospital of Nantong University, Qidong 226200, P R China
| | - Zhuojun Wu
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education 215123, P R China
| | - Ying Zhao
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education 215123, P R China
| | - Xinyu Qiu
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education 215123, P R China
| | - Fang Li
- School of Biology & Basic Medical Sciences, Soochow University, Suzhou 215123, P R China
| | - Qiu Chen
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education 215123, P R China
| | - Fengmei Cui
- School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou 215123, P R China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education 215123, P R China
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Vimal N, Angmo N, Sengupta M, Seth RK. Radiation Hormesis to Improve the Quality of Adult Spodoptera litura (Fabr.). INSECTS 2022; 13:933. [PMID: 36292881 PMCID: PMC9604102 DOI: 10.3390/insects13100933] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
Mass rearing of insects of high biological quality is a crucial attribute for the successful implementation of sterile insect release programs. Various ontogenetic stages of Spodoptera litura (Fabr.) were treated with a range of low doses of ionizing radiation (0.25-1.25 Gy) to assess whether these gamma doses could elicit a stimulating effect on the growth and viability of developing moths. Doses in the range of 0.75 Gy to 1.0 Gy administered to eggs positively influenced pupal weight, adult emergence, and growth index, with a faster developmental period. The enhanced longevity of adults derived from eggs treated with 0.75 Gy and 1.0 Gy, and for larvae and pupae treated with 1.0 Gy, indicated a hormetic effect on these life stages. Furthermore, the use of these hormetic doses upregulated the relative mRNA expression of genes associated with longevity (foxo, sirtuin 2 like/sirt1, atg8) and viability/antioxidative function (cat and sod), suggesting a positive hormetic effect at the transcriptional level. These results indicated the potential use of low dose irradiation (0.75-1 Gy) on preimaginal stages as hormetic doses to improve the quality of the reared moths. This might increase the efficiency of the inherited sterility technique for the management of these lepidopteran pests.
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Affiliation(s)
| | | | | | - Rakesh Kumar Seth
- Applied Entomology and Radiation Biology Lab, Department of Zoology, University of Delhi, Delhi 110007, India
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Parashar P, Das MK, Tripathi P, Kataria T, Gupta D, Sarin D, Hazari PP, Tandon V. DMA, a Small Molecule, Increases Median Survival and Reduces Radiation-Induced Xerostomia via the Activation of the ERK1/2 Pathway in Oral Squamous Cell Carcinoma. Cancers (Basel) 2022; 14:cancers14194908. [PMID: 36230831 PMCID: PMC9562201 DOI: 10.3390/cancers14194908] [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: 06/11/2022] [Revised: 06/24/2022] [Accepted: 07/09/2022] [Indexed: 11/16/2022] Open
Abstract
Survival, recurrence, and xerostomia are considerable problems in the treatment of oral squamous carcinoma patients. In this study, we investigated the role of DMA (5-(4-methylpiperazin-1-yl)-2-[2′-(3,4-dimethoxyphenyl)5″benzimidazoyl]benzimidazole) as a salivary gland cytoprotectant in a patient-derived xenograft mouse model. A significant increase in saliva secretion was observed in the DMA-treated xenograft compared to radiation alone. Repeated doses of DMA with a high dose of radiation showed a synergistic effect on mice survival and reduced tumor growth. The mean survival rate of tumor-bearing mice was significantly enhanced. The increased number of Ki-67-stained cells in the spleen, intestine, and lungs compared to the tumor suggests DMA ablates the tumor but protects other organs. The expression of aquaporin-5 was restored in tumor-bearing mice injected with DMA before irradiation. The reduced expression of αvβ3 integrin and CD44 in DMA alone and DMA with radiation-treated mice suggests a reduced migration of cells and stemness of cancer cells. DMA along with radiation treatment results in the activation of the Ras/Raf/MEK/ERK pathway in the tumor, leading to apoptosis through caspase upregulation. In conclusion, DMA has strong potential for use as an adjuvant in radiotherapy in OSCC patients.
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Affiliation(s)
- Palak Parashar
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Monoj Kumar Das
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Pragya Tripathi
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Tejinder Kataria
- Division of Radiation Oncology, Medanta―The Medicity, Gurgaon 122001, India
| | - Deepak Gupta
- Division of Radiation Oncology, Medanta―The Medicity, Gurgaon 122001, India
| | - Deepak Sarin
- Head and Neck OncoSurgery, Medanta―The Medicity, Gurgaon 122001, India
| | - Puja Panwar Hazari
- Defence Research and Development Organization, Institute of Nuclear Medicine and Allied Sciences, Delhi 110054, India
| | - Vibha Tandon
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
- Correspondence: ; Tel.: +91-11-26742181
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Ryan JL, Sherman AK, Heble DE, Friesen CA, Daniel JF, Fischer RT, Slowik V. The effect of neuropsychiatric medication on pediatric nonalcoholic fatty liver disease. Clin Transl Sci 2022; 15:2241-2250. [PMID: 35769031 PMCID: PMC9468556 DOI: 10.1111/cts.13358] [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: 11/19/2021] [Revised: 05/13/2022] [Accepted: 06/01/2022] [Indexed: 01/25/2023] Open
Abstract
Obese and overweight children are at risk of developing nonalcoholic fatty liver disease (NAFLD), which can lead to steatohepatitis, cirrhosis, and liver transplantation. Neuropsychiatric conditions affect an increasing proportion of children and often require neuropsychiatric medications (NPMs) that are associated with weight gain and/or drug-induced liver injury. We sought to evaluate the role that the extended use of NPMs play in pediatric NAFLD. Medical chart review was conducted for 260 patients with NAFLD (NPM = 77, non-NPM = 183) seen in the Liver Care Center at Children's Mercy Hospital between 2000 and 2016. Outcome measures included body mass index (BMI) percentile, BMI z-score, aspartate aminotransferase (AST), alanine aminotransferase (ALT), total bilirubin, and gamma glutamyltransferase, and were collected at diagnosis, 6-18 month follow-up, and 18-36 months. Controlling for race and metformin, there was a significant increase over time in BMI z-score (p < 0.01) and total bilirubin (p = 0.03), with only initial decreases in ALT (p < 0.01) and AST (p < 0.01). Except for higher total bilirubin in the non-NPM group, no main effect of group or interaction effect was found. Similar patterns remained when subjects were analyzed by NPM drug class. Further study is needed to confirm these findings and to evaluate the effects of NPM dose and duration of exposure, by drug class, on pediatric NAFLD outcomes.
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Affiliation(s)
- Jamie L. Ryan
- Division of Pediatric Gastroenterology, Hepatology, and NutritionChildren’s Mercy HospitalKansas CityMissouriUSA,Division of Developmental and Behavioral HealthChildren’s Mercy HospitalKansas CityMissouriUSA
| | - Ashley K. Sherman
- Division of Health Services and Outcomes ResearchChildren’s Mercy HospitalKansas CityMissouriUSA
| | - Daniel E. Heble
- Department of PharmacyChildren’s Mercy HospitalKansas CityMissouriUSA
| | - Craig A. Friesen
- Division of Pediatric Gastroenterology, Hepatology, and NutritionChildren’s Mercy HospitalKansas CityMissouriUSA,Department of PediatricsUniversity of Missouri – Kansas City School of MedicineKansas CityMissouriUSA
| | - James F. Daniel
- Division of Pediatric Gastroenterology, Hepatology, and NutritionChildren’s Mercy HospitalKansas CityMissouriUSA,Department of PediatricsUniversity of Missouri – Kansas City School of MedicineKansas CityMissouriUSA
| | - Ryan T. Fischer
- Division of Pediatric Gastroenterology, Hepatology, and NutritionChildren’s Mercy HospitalKansas CityMissouriUSA,Department of PediatricsUniversity of Missouri – Kansas City School of MedicineKansas CityMissouriUSA
| | - Voytek Slowik
- Division of Pediatric Gastroenterology, Hepatology, and NutritionChildren’s Mercy HospitalKansas CityMissouriUSA,Department of PediatricsUniversity of Missouri – Kansas City School of MedicineKansas CityMissouriUSA
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Atorvastatin Attenuates Radiotherapy-Induced Intestinal Damage through Activation of Autophagy and Antioxidant Effects. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:7957255. [PMID: 36092168 PMCID: PMC9459441 DOI: 10.1155/2022/7957255] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 07/06/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022]
Abstract
Abdominal or pelvic radiotherapy (RT) often results in small intestinal injury, such as apoptosis of epithelial cells and shortening of the villi. Atorvastatin, a 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitor, has many biological effects including cholesterol reduction, protection from cell damage, and autophagy activation. To reduce the extent of radiotherapy- (RT-) induced enteritis, we investigated the protective effects of atorvastatin against RT-induced damage of the intestinal tract. In this study, C57BL/6 mice were randomly distributed into the following groups (n = 8 per group): (1) control group: mice were fed water only, (2) atorvastatin group (Ator): mice were administered atorvastatin, (3) irradiation group (IR): mice received abdominal RT, (4) Ator+IR group: mice received abdominal RT following atorvastatin administration, and (5) Ator+IR+3-MA group: abdominal RT following atorvastatin and 3-methyladenine (an autophagy inhibitor) administration. Based on the assessment of modified Chiu's injury score and villus/crypt ratio, we found that atorvastatin administration significantly reduced intestinal mucosal damage induced by RT. Atorvastatin treatment reduced apoptosis (cleaved caspase-3 and cleaved poly (ADP-ribose) polymerase), DNA damage (γH2AX and 53BP1), oxidative stress (OS, 4-hydroxynonenal), inflammatory molecules (phospho-NF-κB p65 and TGF-β), fibrosis (collagen I and collagen III), barrier leakage (claudin-2 and fluorescein isothiocyanate-dextran), disintegrity (fatty acid-binding protein 2), and dysfunction (lipopolysaccharide) caused by RT in small intestinal tissue. In addition, atorvastatin upregulated the expression of autophagy-active molecules (LC3B), antioxidants (heme oxygenase 1 and thioredoxin 1), and tight junction proteins (occludin and zonula occludens 1). However, the biological functions of atorvastatin in decreasing RT-induced enteritis were reversed after the administration of 3-MA; the function of antioxidant molecules and activity of thioredoxin reductase were independent of autophagy activation. Our results indicate that atorvastatin can effectively relieve RT-induced enteritis through autophagy activation and associated biological functions, including maintaining integrity and function and decreasing apoptosis, DNA damage, inflammation, OS, and fibrosis. It also acts via its antioxidative capabilities.
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Liu X, Wang J, Fan Y, Xu Y, Xie M, Yuan Y, Li H, Qian X. Particulate Matter Exposure History Affects Antioxidant Defense Response of Mouse Lung to Haze Episodes. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:9789-9799. [PMID: 31328514 DOI: 10.1021/acs.est.9b01068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Few studies have focused on the association between previous particulate matter (PM) exposure and antioxidant defense response to a haze challenge. In this study, a combined exposure model was used to investigate whether and how PM exposure history affected the antioxidant defense response to haze episodes. At first, C57BL/6 male mice were randomly assigned to three groups and exposed for 5 weeks to whole ambient air, ambient air containing a low (≤75 μg/m3) PM concentration, and filtered air, which simulated different exposure history of high, relatively low, and almost zero PM concentrations. Thereafter, all mice underwent a 3-day haze exposure followed by a 7-day exposure to filtered air. The indexes involved in the primary and secondary antioxidant defense response were determined after pre-exposure and haze exposure, as well as 1 day, 3 days, and 7 days after haze exposure. Our research demonstrated repeated exposure to a high PM concentration compromised the antioxidant defense response and was accompanied by an increased susceptibility to a haze challenge. Conversely, mice with a lower PM exposure developed an oxidative stress adaption that protected them against haze challenge more efficiently and in a more timely manner than was the case in mice without PM exposure history.
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Affiliation(s)
- Xuemei Liu
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
- Huaiyin Institute of Technology , School of Chemical Engineering , Huaian 223001 , P. R. China
| | - Jinhua Wang
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
| | - Yifan Fan
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
| | - Yue Xu
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
| | - Mengxing Xie
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
| | - Yu Yuan
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
| | - Huiming Li
- School of Environment , Nanjing Normal University , Nanjing 210023 , P. R. China
| | - Xin Qian
- State Key Laboratory of Pollution Control and Resources Reuse , School of the Environment, Nanjing University , Nanjing 210023 , P. R. China
- Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET) , Nanjing University of Information Science & Technology , Nanjing 210044 , P. R. China
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Guéguen Y, Bontemps A, Ebrahimian TG. Adaptive responses to low doses of radiation or chemicals: their cellular and molecular mechanisms. Cell Mol Life Sci 2019; 76:1255-1273. [PMID: 30535789 PMCID: PMC11105647 DOI: 10.1007/s00018-018-2987-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 11/09/2018] [Accepted: 12/03/2018] [Indexed: 12/17/2022]
Abstract
This article reviews the current knowledge on the mechanisms of adaptive response to low doses of ionizing radiation or chemical exposure. A better knowledge of these mechanisms is needed to improve our understanding of health risks at low levels of environmental or occupational exposure and their involvement in cancer or non-cancer diseases. This response is orchestrated through a multifaceted cellular program involving the concerted action of diverse stress response pathways. These evolutionary highly conserved defense mechanisms determine the cellular response to chemical and physical aggression. They include DNA damage repair (p53, ATM, PARP pathways), antioxidant response (Nrf2 pathway), immune/inflammatory response (NF-κB pathway), cell survival/death pathway (apoptosis), endoplasmic response to stress (UPR response), and other cytoprotective processes including autophagy, cell cycle regulation, and the unfolded protein response. The coordinated action of these processes induced by low-dose radiation or chemicals produces biological effects that are currently estimated with the linear non-threshold model. These effects are controversial. They are difficult to detect because of their low magnitude, the scarcity of events in humans, and the difficulty of corroborating associations over the long term. Improving our understanding of these biological consequences should help humans and their environment by enabling better risk estimates, the revision of radiation protection standards, and possible therapeutic advances.
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Affiliation(s)
- Yann Guéguen
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France.
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRSI, Fontenay-aux-Roses, France.
| | - Alice Bontemps
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France
| | - Teni G Ebrahimian
- Institut de Radioprotection et de Sureté Nucléaire (IRSN), PSE-SANTE, SESANE, LRTOX, B.P. no 17, 92262, Fontenay-aux-Roses Cedex, France
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Epperly MW, Rhieu BH, Franicola D, Dixon T, Cao S, Zhang X, Shields D, Wang H, Wipf P, Greenberger JS. Induction of TGF-β by Irradiation or Chemotherapy in Fanconi Anemia (FA) Mouse Bone Marrow Is Modulated by Small Molecule Radiation Mitigators JP4-039 and MMS350. ACTA ACUST UNITED AC 2017; 31:159-168. [PMID: 28358695 DOI: 10.21873/invivo.11040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 01/26/2017] [Accepted: 01/31/2017] [Indexed: 12/28/2022]
Abstract
BACKGROUND/AIM Total-body irradiation and/or administration of chemotherapy drugs in bone marrow transplantation induce cytokines that can suppress engraftment. Fanconi Anemia (FA) patients have a hyperactive responsiveness to the inhibitory cytokine, transforming growth factor-beta (TGF-β). Small molecule radiation mitigator drugs, JP4-039 and MMS350, were evaluated for suppression of irradiation or drug-induced TGF-β. MATERIALS AND METHODS In vivo induction of TGF-β by total-body ionizing irradiation (TBI), L-phenylalanine mustard (L-PAM), busulfan or fludarabine, was quantified. In parallel, mitigator drug amelioration of TGF-β induction in FA D2-/- (FANCD2-/-) mouse bone marrow, was studied in vitro. Tissue culture medium, cell lysates, and mouse plasma were analyzed for TGF-β levels. RESULTS Induction of TGF-β levels in FANCD2-/- and FANCD2+/+ mice and in mouse bone marrow were modulated by both JP4-039 and MMS350. CONCLUSION Bone marrow transplantation in FA recipients may benefit from administration of small molecule agents that suppress TGF-β induction.
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Affiliation(s)
- Michael W Epperly
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Byung-Han Rhieu
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Darcy Franicola
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Tracy Dixon
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Shaonan Cao
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Xichen Zhang
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Donna Shields
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Hong Wang
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, U.S.A
| | - Joel S Greenberger
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, U.S.A.
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Ye H, Chen M, Cao F, Huang H, Zhan R, Zheng X. Chloroquine, an autophagy inhibitor, potentiates the radiosensitivity of glioma initiating cells by inhibiting autophagy and activating apoptosis. BMC Neurol 2016; 16:178. [PMID: 27644442 PMCID: PMC5029068 DOI: 10.1186/s12883-016-0700-6] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 09/12/2016] [Indexed: 12/20/2022] Open
Abstract
Background Glioblastoma is refractory to conventional treatment, which is combined of surgery, chemotherapy and radiotherapy. Recent studies have shown that glioma initiating cells (GICs) contribute to tumorigenesis and radioresistance. Recently, other studies showed that the GICs use the autophagy as the major pathway to survive. Chloroquine, an anti-malarial chemical, is an autophagic inhibitor which blocks autophagosome fusion with lysosome and slows down lysosomal acidification. The aim of this study was to explore the mechanisms of chloroquine on the radiosensitivity of GICs. Methods Human glioblastoma cell lines U87 were investigated. MTT and clonogenic survival assay were used to evaluate the cell viability and survival from radiation. The formation of autophagosomes were evaluated by immunofluorescence. Annexin V-FITC/PI staining and flow cytometry were used to quantify the apoptotic cells. The expression levels of proteins were analyzed by Western blot. Cell cycle status was analyzed by checking DNA content after staining with PI. A comet assay was used to assess the DNA repair in the cells. Tumorsphere assay was used for evaluating GICs’ renewal ability. Results Treatment of U87 GICs with chloroquine (10–80 nmol/L) alone inhibited the cell growth in a dose-dependent manner. A dose of chloroquine (20 nmol/L) obviously enhanced the radiation sensitivity of U87 GICs., we found more punctate patterns of microtubule-associated protein LC3 immunoreactivity in radiation-treated U87 GICs, and the level of membrane-bound LC3-II was obviously enhanced. A combination of radiation and chloroquine obviously enhanced the U87 GICs’ apoptosis, as demonstrated by the enhanced levels of caspase-3, and reduced level of Bcl-2. In additon, combination of radiation and chloroquine cause G1/G0 cell cycle arrest. what’s more, Chloroquine obviously weakened the repair of radiation-induced DNA damage as reflected by the tail length of the comet. Combination treatment of irradiation and chloroquine has synergistic effects on decreasing the GICs’ tumorsphere number and diameter. Conclusion Chloroquine enhances the radiosensitivity of GICs in vitro, suggesting the feasibility of joint treatment with chloroquine with radiation for GBM.
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Affiliation(s)
- Hongxing Ye
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China
| | - Mantao Chen
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China
| | - Fei Cao
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China
| | - Hongguang Huang
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China
| | - Renya Zhan
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China.
| | - Xiujue Zheng
- Department of Neurosurgery, First Affiliated Hospital, School of Medicine, Zhejiang University, No. 79 Qingchun Road, Hangzhou, Zhejiang, People's Republic of China.
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Koukourakis MI, Mitrakas AG, Giatromanolaki A. Therapeutic interactions of autophagy with radiation and temozolomide in glioblastoma: evidence and issues to resolve. Br J Cancer 2016; 114:485-96. [PMID: 26889975 PMCID: PMC4782209 DOI: 10.1038/bjc.2016.19] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/21/2015] [Accepted: 12/31/2015] [Indexed: 02/07/2023] Open
Abstract
Glioblastoma is a unique model of non-metastasising disease that kills the vast majority of patients through local growth, despite surgery and local irradiation. Glioblastoma cells are resistant to apoptotic stimuli, and their death occurs through autophagy. This review aims to critically present our knowledge regarding the autophagic response of glioblastoma cells to radiation and temozolomide (TMZ) and to delineate eventual research directions to follow, in the quest of improving the curability of this incurable, as yet, disease. Radiation and TMZ interfere with the autophagic machinery, but whether cell response is driven to autophagy flux acceleration or blockage is disputable and may depend on both cell individuality and radiotherapy fractionation or TMZ schedules. Potent agents that block autophagy at an early phase of initiation or at a late phase of autolysosomal fusion are available aside to agents that induce functional autophagy, or even demethylating agents that may unblock the function of autophagy-initiating genes in a subset of tumours. All these create a maze, which if properly investigated can open new insights for the application of novel radio- and chemosensitising policies, exploiting the autophagic pathways that glioblastomas use to escape death.
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Affiliation(s)
- Michael I Koukourakis
- Department of Radiotherapy/Oncology, Democritus University of Thrace, PO Box 12, Alexandroupolis 68100, Greece
| | - Achilleas G Mitrakas
- Department of Radiotherapy/Oncology, Democritus University of Thrace, PO Box 12, Alexandroupolis 68100, Greece
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Lin CW, Lo S, Perng DS, Wu DBC, Lee PH, Chang YF, Kuo PL, Yu ML, Yuan SSF, Hsieh YC. Complete activation of autophagic process attenuates liver injury and improves survival in septic mice. Shock 2014; 41:241-249. [PMID: 24365881 DOI: 10.1097/shk.0000000000000111] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The accumulation of autophagosomes in the terminal step of the autophagic process has recently emerged as a potentially maladaptive process in the septic heart and lung. However, the role of autophagy in the septic liver has not been ascertained. This study was investigated by first examining the entire sequence of the autophagic process in the liver of septic mice. Second, a novel pharmacotherapeutic approach was utilized to treat sepsis with autophagy enhancer/inhibitor. Sepsis was induced by cecal ligation and puncture (CLP). C57BL/6 mice received autophagy enhancer carbamazepine (CBZ), autophagy inhibitor 3-methyladenine (inhibition of autophagosomal formation), or chloroquine (impairment of autophagosomal clearance). We found that the whole autophagic process was activated at 4 h after CLP; however, it did not proceed to completion during the 4- to 24-h time period, as indicated by accumulated autophagosomes and decreased autophagic flux. Carbamazepine, which induced complete activation of the autophagic process, improved CLP survival. This protective effect was also associated with decreased cell death, inflammatory responses, and hepatic injury. However, disruption of autophagosomal clearance with chloroquine abolished the above protective effects in CBZ-treated CLP mice. 3-Methyladenine, which resulted in inhibition of the autophagosomal formation, did not show any above beneficial effects in CLP mice. Impaired autophagosome-lysome fusion resulting in incomplete activation of autophagy may contribute to sepsis-induced liver injury. Treatment with CBZ may serve a protective role in the septic liver, possibly through the effect of complete activation of autophagic process.
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Affiliation(s)
- Chih-Wen Lin
- *Division of Gastroenterology and Hepatology, Department of Medicine, E-Da Hospital, I-Shou University; †Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University; ‡Department of Plastic and Reconstructive Surgery, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan; §Canniesburn Plastic Surgery Unit, Royal Infirmary, Glasgow, UK; ∥Jeffrey Cheah School of Medicine and Health Sciences, Monash University Sunway Campus, Malaysia; ¶Division of General Surgery, Department of Surgery, and **Department of Medical Research, E-Da Hospital, I-Shou University; ††School of Medicine, College of Medicine, Kaohsiung Medical University; ‡‡Hepatobiliary Division, Department of Internal Medicine, §§Translational Research Center and Cancer Center, and ∥∥Department of Obstetrics & Gynecology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
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12
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Anzai K, Ueno M, Matsumoto KI, Ikota N, Takata J. Gamma-tocopherol-N,N-dimethylglycine ester as a potent post-irradiation mitigator against whole body X-irradiation-induced bone marrow death in mice. JOURNAL OF RADIATION RESEARCH 2014; 55:67-74. [PMID: 23908555 PMCID: PMC3885127 DOI: 10.1093/jrr/rrt094] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 06/05/2013] [Accepted: 06/24/2013] [Indexed: 06/02/2023]
Abstract
We examined the radioprotective and mitigative effects of gamma-tocopherol-N,N-dimethylglycine ester (GTDMG), a novel water-soluble gamma-tocopherol derivative, against X-irradiation-induced bone marrow death in mice. Mice (C3H, 10 weeks, male) were injected intraperitoneally with GTDMG suspended in a 0.5% methyl cellulose solution before or after receiving of 7.5-Gy whole body X-irradiation. GTDMG significantly enhanced the 30-day survival rate when given 30 min before or immediately after the irradiation. Its mitigative activity (administered after exposure) was examined further in detail. The optimal concentration of GTDMG given immediately after irradiation was around 100 mg/kg body weight (bw) and the 30-day survival rate was 97.6 ± 2.4%. When GTDMG was administered 1, 10 and 24 h post-irradiation, the survival rate was 85.7 ± 7.6, 75.0 ± 9.7 and 36.7 ± 8.8%, respectively, showing significant mitigation even at 24 h after irradiation (P < 0.05). The value of the dose reduction factor (100 mg/kg bw, given intraperitoneally (i.p.) immediately after irradiation) was 1.25. GTDMG enhanced the recovery of red blood cell-, white blood cell-, and platelet-counts after irradiation and significantly increased the number of endogenous spleen colonies (P < 0.05). Subcutaneous (s.c.) administration also had mitigative effects. In conclusion, GTDMG is a potent radiation mitigator.
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Affiliation(s)
- Kazunori Anzai
- Nihon Pharmaceutical University
- National Institute of Radiological Sciences
| | | | | | | | - Jiro Takata
- Faculty of Pharmaceutical Sciences, Fukuoka University
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13
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Lazo JS, Sharlow ER, Epperly MW, Lira A, Leimgruber S, Skoda EM, Wipf P, Greenberger JS. Pharmacologic profiling of phosphoinositide 3-kinase inhibitors as mitigators of ionizing radiation-induced cell death. J Pharmacol Exp Ther 2013; 347:669-80. [PMID: 24068833 DOI: 10.1124/jpet.113.208421] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Ionizing radiation (IR) induces genotoxic stress that triggers adaptive cellular responses, such as activation of the phosphoinositide 3-kinase (PI3K)/Akt signaling cascade. Pluripotent cells are the most important population affected by IR because they are required for cellular replenishment. Despite the clear danger to large population centers, we still lack safe and effective therapies to abrogate the life-threatening effects of any accidental or intentional IR exposure. Therefore, we computationally analyzed the chemical structural similarity of previously published small molecules that, when given after IR, mitigate cell death and found a chemical cluster that was populated with PI3K inhibitors. Subsequently, we evaluated structurally diverse PI3K inhibitors. It is remarkable that 9 of 14 PI3K inhibitors mitigated γIR-induced death in pluripotent NCCIT cells as measured by caspase 3/7 activation. A single intraperitoneal dose of LY294002 [2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one], administered to mice at 4 or 24 hours, or PX-867 [(4S,4aR,5R,6aS,9aR,Z)-11-hydroxy-4-(methoxymethyl)-4a,6a-dimethyl-2,7,10-trioxo-1-(pyrrolidin-1-ylmethylene)-1,2,4,4a,5,6,6a,7,8,9,9a,10-dodecahydroindeno[4,5-H]isochromen-5-yl acetate (CID24798773)], administered 4 hours after a lethal dose of γIR, statistically significantly (P < 0.02) enhanced in vivo survival. Because cell cycle checkpoints are important regulators of cell survival after IR, we examined cell cycle distribution in NCCIT cells after γIR and PI3K inhibitor treatment. LY294002 and PX-867 treatment of nonirradiated cells produced a marked decrease in S phase cells with a concomitant increase in the G1 population. In irradiated cells, LY294002 and PX-867 treatment also decreased S phase and increased the G1 and G2 populations. Treatment with LY294002 or PX-867 decreased γIR-induced DNA damage as measured by γH2AX, suggesting reduced DNA damage. These results indicate pharmacologic inhibition of PI3K after IR abrogated cell death.
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Affiliation(s)
- John S Lazo
- Department of Pharmacology, University of Virginia, Charlottesville, Virginia (J.S.L., E.R.S., A.L., S.L.); Departments of Radiation Oncology (M.W.E., J.S.G.), Chemistry (E.M.S., P.W.), and Pharmaceutical Sciences (P.W.), University of Pittsburgh, Pittsburgh, Pennsylvania
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14
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Goff JP, Shields DS, Wang H, Skoda EM, Sprachman MM, Wipf P, Garapati VK, Atkinson J, London B, Lazo JS, Kagan V, Epperly MW, Greenberger JS. Evaluation of potential ionizing irradiation protectors and mitigators using clonogenic survival of human umbilical cord blood hematopoietic progenitor cells. Exp Hematol 2013; 41:957-66. [PMID: 23933481 DOI: 10.1016/j.exphem.2013.08.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 12/17/2012] [Accepted: 08/01/2013] [Indexed: 01/08/2023]
Abstract
We evaluated the use of colony formation (colony-forming unit-granulocyte macrophage [CFU-GM], burst-forming unit erythroid [BFU-E], and colony-forming unit-granulocyte-erythroid-megakaryocyte-monocytes [CFU-GEMM]) by human umbilical cord blood (CB) hematopoietic progenitor cells for testing novel small molecule ionizing irradiation protectors and mitigators. The following compounds were added before (protection) or after (mitigation) ionizing irradiation: GS-nitroxides (JP4-039 and XJB-5-131), the bifunctional sulfoxide MMS-350, the phosphoinositol-3-kinase inhibitor LY29400, triphenylphosphonium-imidazole fatty acid, the nitric oxide synthase inhibitor (MCF-201-89), the p53/mdm2/mdm4 inhibitor (BEB55), methoxamine, isoproterenol, propranolol, and the adenosine triphosphate-sensitive potassium channel blocker (glyburide). The drugs XJB-5-131, JP4-039, and MMS-350 were radiation protectors for CFU-GM. JP4-039 was also a radiation protector for CFU-GEMM. The drugs XJB-5-131, JP4-039, and MMS-350 were radiation mitigators for BFU-E, MMS-350 and JP4-039 were mitigators for CFU-GM, and MMS350 was a mitigator for CFU-GEMM. In contrast, other drugs were effective in murine assays; TTP-IOA, LY294002, MCF201-89, BEB55, propranolol, isoproterenol, methoxamine, and glyburide but showed no significant protection or mitigation in human CB assays. These data support the testing of new candidate clinical radiation protectors and mitigators using human CB clonogenic assays early in the drug discovery process, thus reducing the need for animal experiments.
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Affiliation(s)
- Julie P Goff
- Department of Radiation Oncology, University of Pittsburgh, Pittsburgh, PA, USA
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15
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Wang B, Tanaka K, Morita A, Ninomiya Y, Maruyama K, Fujita K, Hosoi Y, Nenoi M. Sodium orthovanadate (vanadate), a potent mitigator of radiation-induced damage to the hematopoietic system in mice. JOURNAL OF RADIATION RESEARCH 2013; 54:620-9. [PMID: 23349341 PMCID: PMC3709668 DOI: 10.1093/jrr/rrs140] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 12/07/2012] [Accepted: 12/24/2012] [Indexed: 05/31/2023]
Abstract
Previous in vitro and in vivo studies have shown that sodium orthovanadate (vanadate), an inorganic vanadium compound, could effectively suppress radiation-induced p53-mediated apoptosis via both transcription-dependent and transcription-independent pathways. As a potent radiation protector administered at a dose of 20 mg/kg body weight (20 mg/kg) prior to total body irradiation (TBI) by intra-peritoneal (ip) injection, it completely protected mice from hematopoietic syndrome and partially from gastrointestinal syndrome. In the present study, radiation mitigation effects from vanadate were investigated by ip injection of vanadate after TBI in mice. Results showed that a single administration of vanadate at a dose of 20 mg/kg markedly improved the 30-day survival rate and the peripheral blood hemogram, relieved bone marrow aplasia and decreased occurrence of the bone marrow micronucleated erythrocytes in the surviving animals. The dose reduction factor was 1.2 when a single dose of 20 mg/kg was administered 15 min after TBI in mice using the 30-day survival test as the endpoint. Results also showed that either doubling the vanadate dose (40 mg/kg) in a single administration or continuing the vanadate treatment (after a single administration at 20 mg/kg) from the following day at a dose of 5 mg/kg per day for 4 consecutive days further significantly improved the efficacy for rescuing bone marrow failure in the 30-day survival test. Taken together, these findings indicate that vanadate would be a potent mitigator suppressing the acute lethality (hematopoietic syndrome) and minimizing the detrimental effects (anhematopoiesis and delayed genotoxic effects) induced by TBI in mice.
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Affiliation(s)
- Bing Wang
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Kaoru Tanaka
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Akinori Morita
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8553, Japan
| | - Yasuharu Ninomiya
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Kouichi Maruyama
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
| | - Kazuko Fujita
- School of Medicine, Faculty of Medicine, Toho University, Omorinishi 5-21-16, Ota-ku, Tokyo 143-8540, Japan
| | - Yoshio Hosoi
- Research Institute for Radiation Biology and Medicine, Hiroshima University, Kasumi 1-2-3, Minami-ku, Hiroshima 734-8553, Japan
| | - Mitsuru Nenoi
- Radiation Risk Reduction Research Program, Research Center for Radiation Protection, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage-ku, Chiba 263-8555, Japan
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Yang YP, Hu LF, Zheng HF, Mao CJ, Hu WD, Xiong KP, Wang F, Liu CF. Application and interpretation of current autophagy inhibitors and activators. Acta Pharmacol Sin 2013; 34:625-35. [PMID: 23524572 DOI: 10.1038/aps.2013.5] [Citation(s) in RCA: 278] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Autophagy is the major intracellular degradation system, by which cytoplasmic materials are delivered to and degraded in the lysosome. As a quality control mechanism for cytoplasmic proteins and organelles, autophagy plays important roles in a variety of human diseases, including neurodegenerative diseases, cancer, cardiovascular disease, diabetes and infectious and inflammatory diseases. The discovery of ATG genes and the dissection of the signaling pathways involved in regulating autophagy have greatly enriched our knowledge on the occurrence and development of this lysosomal degradation pathway. In addition to its role in degradation, autophagy may also promote a type of programmed cell death that is different from apoptosis, termed type II programmed cell death. Owing to the dual roles of autophagy in cell death and the specificity of diseases, the exact mechanisms of autophagy in various diseases require more investigation. The application of autophagy inhibitors and activators will help us understand the regulation of autophagy in human diseases, and provide insight into the use of autophagy-targeted drugs. In this review, we summarize the latest research on autophagy inhibitors and activators and discuss the possibility of their application in human disease therapy.
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Zhavoronkov A, Smit-McBride Z, Guinan KJ, Litovchenko M, Moskalev A. Potential therapeutic approaches for modulating expression and accumulation of defective lamin A in laminopathies and age-related diseases. J Mol Med (Berl) 2012; 90:1361-89. [PMID: 23090008 PMCID: PMC3506837 DOI: 10.1007/s00109-012-0962-4] [Citation(s) in RCA: 16] [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: 05/06/2012] [Revised: 09/08/2012] [Accepted: 09/25/2012] [Indexed: 01/28/2023]
Abstract
Scientific understanding of the genetic components of aging has increased in recent years, with several genes being identified as playing roles in the aging process and, potentially, longevity. In particular, genes encoding components of the nuclear lamina in eukaryotes have been increasingly well characterized, owing in part to their clinical significance in age-related diseases. This review focuses on one such gene, which encodes lamin A, a key component of the nuclear lamina. Genetic variation in this gene can give rise to lethal, early-onset diseases known as laminopathies. Here, we analyze the literature and conduct computational analyses of lamin A signaling and intracellular interactions in order to examine potential mechanisms for altering or slowing down aberrant Lamin A expression and/or for restoring the ratio of normal to aberrant lamin A. The ultimate goal of such studies is to ameliorate or combat laminopathies and related diseases of aging, and we provide a discussion of current approaches in this review.
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Affiliation(s)
- Alex Zhavoronkov
- Bioinformatics and Medical Information Technology Laboratory, Center for Pediatric Hematology, Oncology and Immunology, Moscow, 119296 Russia
- The Biogerontology Research Foundation, Reading, UK
| | - Zeljka Smit-McBride
- Department of Ophthalmology and Vision Science, School of Medicine, University of California at Davis, Davis, CA 95616 USA
| | - Kieran J. Guinan
- The Biogerontology Research Foundation, Reading, UK
- BioAtlantis Ltd., Kerry Technology Park, Tralee, County Kerry Ireland
| | - Maria Litovchenko
- Bioinformatics and Medical Information Technology Laboratory, Center for Pediatric Hematology, Oncology and Immunology, Moscow, 119296 Russia
| | - Alexey Moskalev
- The Biogerontology Research Foundation, Reading, UK
- Laboratory of Molecular Radiobiology and Gerontology, Institute of Biology, Komi Science Center of Russian Academy of Sciences, Syktyvkar, 167982 Russia
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Soto-Pantoja DR, Miller TW, Pendrak ML, DeGraff WG, Sullivan C, Ridnour LA, Abu-Asab M, Wink DA, Tsokos M, Roberts DD. CD47 deficiency confers cell and tissue radioprotection by activation of autophagy. Autophagy 2012; 8:1628-42. [PMID: 22874555 PMCID: PMC3494592 DOI: 10.4161/auto.21562] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Accidental or therapeutic exposure to ionizing radiation has severe physiological consequences and can result in cell death. We previously demonstrated that deficiency or blockade of the ubiquitously expressed receptor CD47 results in remarkable cell and tissue protection against ischemic and radiation stress. Antagonists of CD47 or its ligand THBS1/thrombospondin 1 enhance cell survival and preserve their proliferative capacity. However the signaling pathways that mediate this cell-autonomous radioprotection are unclear. We now report a marked increase in autophagy in irradiated T-cells and endothelial cells lacking CD47. Irradiated T cells lacking CD47 exhibit significant increases in formation of autophagosomes comprising double-membrane vesicles visualized by electron microscopy and numbers of MAP1LC3A/B(+) puncta. Moreover, we observed significant increases in BECN1, ATG5, ATG7 and a reduction in SQSTM1/p62 expression relative to irradiated wild-type T cells. We observed similar increases in autophagy gene expression in mice resulting from blockade of CD47 in combination with total body radiation. Pharmacological or siRNA-mediated inhibition of autophagy selectively sensitized CD47-deficient cells to radiation, indicating that enhanced autophagy is necessary for the prosurvival response to CD47 blockade. Moreover, re-expression of CD47 in CD47-deficient T cells sensitized these cells to death by ionizing radiation and reversed the increase in autophagic flux associated with survival. This study indicates that CD47 deficiency confers cell survival through the activation of autophagic flux and identifies CD47 blockade as a pharmacological route to modulate autophagy for protecting tissue from radiation injury.
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Affiliation(s)
- David R. Soto-Pantoja
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Thomas W. Miller
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Michael L. Pendrak
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - William G. DeGraff
- Radiation Biology Branch; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Camille Sullivan
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Lisa A. Ridnour
- Radiation Biology Branch; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Mones Abu-Asab
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
- Section of Immunopathology; Laboratory of Immunology; National Eye Institute; National Institutes of Health; Bethesda, MD USA
| | - David A. Wink
- Radiation Biology Branch; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - Maria Tsokos
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
| | - David D. Roberts
- Laboratory of Pathology; Center for Cancer Research; National Cancer Institute; Bethesda, MD USA
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Golden EB, Pellicciotta I, Demaria S, Barcellos-Hoff MH, Formenti SC. The convergence of radiation and immunogenic cell death signaling pathways. Front Oncol 2012; 2:88. [PMID: 22891162 PMCID: PMC3413017 DOI: 10.3389/fonc.2012.00088] [Citation(s) in RCA: 198] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 07/18/2012] [Indexed: 11/13/2022] Open
Abstract
Ionizing radiation (IR) triggers programmed cell death in tumor cells through a variety of highly regulated processes. Radiation-induced tumor cell death has been studied extensively in vitro and is widely attributed to multiple distinct mechanisms, including apoptosis, necrosis, mitotic catastrophe (MC), autophagy, and senescence, which may occur concurrently. When considering tumor cell death in the context of an organism, an emerging body of evidence suggests there is a reciprocal relationship in which radiation stimulates the immune system, which in turn contributes to tumor cell kill. As a result, traditional measurements of radiation-induced tumor cell death, in vitro, fail to represent the extent of clinically observed responses, including reductions in loco-regional failure rates and improvements in metastases free and overall survival. Hence, understanding the immunological responses to the type of radiation-induced cell death is critical. In this review, the mechanisms of radiation-induced tumor cell death are described, with particular focus on immunogenic cell death (ICD). Strategies combining radiotherapy with specific chemotherapies or immunotherapies capable of inducing a repertoire of cancer specific immunogens might potentiate tumor control not only by enhancing cell kill but also through the induction of a successful anti-tumor vaccination that improves patient survival.
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Affiliation(s)
- Encouse B Golden
- Department of Radiation Oncology, New York University New York, NY, USA
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20
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Zellefrow CD, Sharlow ER, Epperly MW, Reese CE, Shun T, Lira A, Greenberger JS, Lazo JS. Identification of druggable targets for radiation mitigation using a small interfering RNA screening assay. Radiat Res 2012; 178:150-9. [PMID: 22747550 DOI: 10.1667/rr2810.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Currently, there is a serious absence of pharmaceutically attractive small molecules that mitigate the lethal effects of an accidental or intentional public exposure to toxic doses of ionizing radiation. Moreover, cellular systems that emulate the radiobiologically relevant cell populations and that are suitable for high-throughput screening have not been established. Therefore, we examined two human pluripotent embryonal carcinoma cell lines for use in an unbiased phenotypic small interfering RNA (siRNA) assay to identify proteins with the potential of being drug targets for the protection of human cell populations against clinically relevant ionizing radiation doses that cause acute radiation syndrome. Of the two human cell lines tested, NCCIT cells had optimal growth characteristics in a 384 well format, exhibited radiation sensitivity (D(0) = 1.3 ± 0.1 Gy and ñ = 2.0 ± 0.6) comparable to the radiosensitivity of stem cell populations associated with human death within 30 days after total-body irradiation. Moreover, they internalized siRNA after 4 Gy irradiation enabling siRNA library screening. Therefore, we used the human NCCIT cell line for the radiation mitigation study with a siRNA library that silenced 5,520 genes known or hypothesized to be potential therapeutic targets. Exploiting computational methodologies, we identified 113 siRNAs with potential radiomitigative properties, which were further refined to 29 siRNAs with phosphoinositide-3-kinase regulatory subunit 1 (p85α) being among the highest confidence candidate gene products. Colony formation assays revealed radiation mitigation when the phosphoinositide-3-kinase inhibitor LY294002 was given after irradiation of 32D cl 3 cells (D(0) = 1.3 ± 0.1 Gy and ñ = 2.3 ± 0.3 for the vehicle control treated cells compared to D(0) = 1.2 ± 0.1 Gy and ñ = 6.0 ± 0.8 for the LY294002 treated cells, P = 0.0004). LY294002 and two other PI3K inhibitors, PI 828 and GSK 1059615, also mitigated radiation-induced apoptosis in NCCIT cells. Treatment of mice with a single intraperitoneal LY294002 dose of 30 mg/kg at 10 min, 4, or 24 h after LD(50/30) whole-body dose of irradiation (9.25 Gy) enhanced survival. This study documents that an unbiased siRNA assay can identify new genes, signaling pathways, and chemotypes as radiation mitigators and implicate the PI3K pathway in the human radiation response.
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Medhora M, Gao F, Fish BL, Jacobs ER, Moulder JE, Szabo A. Dose-modifying factor for captopril for mitigation of radiation injury to normal lung. JOURNAL OF RADIATION RESEARCH 2012; 53:633-40. [PMID: 22843631 PMCID: PMC3393339 DOI: 10.1093/jrr/rrs004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 02/28/2012] [Indexed: 05/20/2023]
Abstract
Our goal is to develop countermeasures for pulmonary injury following unpredictable events such as radiological terrorism or nuclear accidents. We have previously demonstrated that captopril, an angiotensin converting enzyme (ACE) inhibitor, is more effective than losartan, an angiotensin type-1 receptor blocker, in mitigating radiation-pneumopathy in a relevant rodent model. In the current study we determined the dose modifying factors (DMFs) of captopril for mitigation of parameters of radiation pneumonitis. We used a whole animal model, irradiating 9-10-week-old female rats derived from a Wistar strain (WAG/RijCmcr) with a single dose of irradiation to the thorax of 11, 12, 13, 14 or 15 Gy. Our study develops methodology to measure DMFs for morbidity (survival) as well as physiological endpoints such as lung function, taking into account attrition due to lethal radiation-induced pneumonitis. Captopril delivered in drinking water (140-180 mg/m(2)/day, comparable with that given clinically) and started one week after irradiation has a DMF of 1.07-1.17 for morbidity up to 80 days (survival) and 1.21-1.35 for tachypnea at 42 days (at the peak of pneumonitis) after a single dose of ionizing radiation (X-rays). These encouraging results advance our goals, since DMF measurements are essential for drug labeling and comparison with other mitigators.
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Affiliation(s)
- Meetha Medhora
- Department of Radiation Oncology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.
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22
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Flickinger JC, Kim H, Kano H, Greenberger JS, Arai Y, Niranjan A, Lunsford LD, Kondziolka D, Flickinger JC. Do Carbamazepine, Gabapentin, or Other Anticonvulsants Exert Sufficient Radioprotective Effects to Alter Responses From Trigeminal Neuralgia Radiosurgery? Int J Radiat Oncol Biol Phys 2012; 83:e501-6. [DOI: 10.1016/j.ijrobp.2012.01.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2011] [Revised: 01/03/2012] [Accepted: 01/05/2012] [Indexed: 11/24/2022]
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Abstract
PURPOSE To review the cellular mechanisms of hormetic effects induced by low dose and low dose rate ionising radiation in model systems, and to call attention to the possible role of autophagy in some hormetic effects. RESULTS AND CONCLUSIONS Very low radiation doses stimulate cell proliferation by changing the equilibrium between the phosphorylated and dephosphorylated forms of growth factor receptors. Radioadaptation is induced by various weak stress stimuli and depends on signalling events that ultimately decrease the molecular damage expression at the cellular level upon subsequent exposure to a moderate radiation dose. Ageing and cancer result from oxidative damage under oxidative stress conditions; nevertheless, ROS are also prominent inducers of autophagy, a cellular process that has been shown to be related both to ageing retardation and cancer prevention. A balance between the signalling functions and damaging effects of ROS seems to be the most important factor that decides the fate of the mammalian cell when under oxidative stress conditions, after exposure to ionising radiation. Not enough is yet known on the pre-requirements for maintaining such a balance. Given the present stage of investigation into radiation hormesis, the application of the conclusions from experiments on model systems to the radiation protection regulations would not be justified.
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Affiliation(s)
- Irena Szumiel
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Warsaw, Poland.
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Satyamitra M, Ney P, Graves J, Mullaney C, Srinivasan V. Mechanism of radioprotection by δ-tocotrienol: pharmacokinetics, pharmacodynamics and modulation of signalling pathways. Br J Radiol 2012; 85:e1093-103. [PMID: 22674714 DOI: 10.1259/bjr/63355844] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVE The objective of this study was to investigate the correlation between in vivo δ-tocotrienol (DT3) pharmacokinetics, pharmacodynamics and radiation protection, and to evaluate the effect of DT3 pre-treatment on radiation-induced alterations in apoptotic and autophagic pathways. METHODS We evaluated pharmacokinetics (plasma, 0.5 to 12 h) and pharmacodynamics (peripheral blood indices; day 3, 7, 10 and 14) after a single subcutaneous injection of 300 mg kg(-1) DT3 in unirradiated CD2F1 mice. Next, we monitored 30-day post-irradiation survival (9.25 Gy) and haematopoietic recovery of DT3-treated mice (7 Gy) exposed to cobalt-60 γ-irradiation. The effects of DT3 on irradiated bone marrow apoptosis and autophagy were determined by analyses of key caspases (3, 7, 9 and 8), beclin-1 and light chain 3 conversion. RESULTS Plasma concentration of DT3 reached ∼195 µM (Cmax) 1 h after injection (Tmax), and DT3 was eliminated from plasma 12 h later. In unirradiated mice, DT3 significantly increased white blood cells (WBCs), neutrophils, lymphocytes (day 3 post DT3 injection) and platelets (day 7) by 1.5- to 2-fold, over vehicle-treated control. DT3 pre-treatment improved 30-day survival to 100% (∼15% in control) and accelerated recovery of reticulocytes, platelets, WBCs, neutrophils, lymphocytes and monocytes in peripheral blood. DT3 reduced activation of caspase-8, caspase-3 and caspase-7, inherent to apoptosis, while increasing autophagy-related beclin-1 expression in irradiated bone marrow. CONCLUSION These data indicate that DT3 stimulates multilineage haematopoiesis, protects against radiation-induced apoptosis downstream of the mitochondria and stimulates cytoprotective autophagy. Apart from a potent antioxidant activity, DT3 may elicit survival advantage following irradiation by enhancing haematopoiesis and modulating signalling pathways.
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Affiliation(s)
- M Satyamitra
- Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA.
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Kim H, Bernard ME, Farkas A, Goff J, Kalash R, Houghton F, Shields D, Franicola D, Dixon T, Zhang X, Epperly M, Wang H, Cobanoglu MC, Greenberger JS. Ionizing irradiation protection and mitigation of murine cells by carbamazepine is p53 and autophagy independent. In Vivo 2012; 26:341-354. [PMID: 22523285 PMCID: PMC3335174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Carbamazepine, a sodium channel blocker and pro-autophagy agent used in the treatment of epilepsy and trigeminal neuralgia, is also an ionizing radiation mitigator and protector. MATERIALS AND METHODS We measured the effect of carbamazepine, compared to other pro-autophagy drugs (i.e. lithium and valproic acid), on irradiation of autophagy incompetent (Atg5(-/-)) and competent (Atg5(+/+)) mouse embryonic fibroblasts, p53(-/-) and p53(+/+) bone marrow stromal cells, and human IB3, KM101, HeLa, and umbilical cord blood cell and in total body-irradiated or orthotopic tumor-bearing mice. RESULTS Carbamazepine, but not other pro-autophagy drugs, was a radiation protector and mitigator for mouse cell lines, independent of apoptosis, autophagy, p53, antioxidant store depletion, and class I phosphatidylinositol 3-kinase, but was ineffective with human cells. Carbamazepine was effective when delivered 24 hours before or 12 hours after total body irradiation of C57BL/6HNsd mice and did not protect orthotopic Lewis lung tumors. CONCLUSION Carbamazepine is a murine radiation protector and mitigator.
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Affiliation(s)
- Hyun Kim
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Mark E. Bernard
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Amy Farkas
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Julie Goff
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Ronny Kalash
- School of Medicine, Lake Erie College of Osteopathic Medicine, Erie, PA, USA
| | - Frank Houghton
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Donna Shields
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Darcy Franicola
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Tracy Dixon
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Xichen Zhang
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Michael Epperly
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Hong Wang
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
| | - Murat Can Cobanoglu
- Department of Computational and Systems Biology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Joel S. Greenberger
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA
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Greenberger JS, Clump D, Kagan V, Bayir H, Lazo JS, Wipf P, Li S, Gao X, Epperly MW. Strategies for discovery of small molecule radiation protectors and radiation mitigators. Front Oncol 2012; 1:59. [PMID: 22655254 PMCID: PMC3356036 DOI: 10.3389/fonc.2011.00059] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 12/20/2011] [Indexed: 01/01/2023] Open
Abstract
Mitochondrial targeted radiation damage protectors (delivered prior to irradiation) and mitigators (delivered after irradiation, but before the appearance of symptoms associated with radiation syndrome) have been a recent focus in drug discovery for (1) normal tissue radiation protection during fractionated radiotherapy, and (2) radiation terrorism counter measures. Several categories of such molecules have been discovered: nitroxide-linked hybrid molecules, including GS-nitroxide, GS-nitric oxide synthase inhibitors, p53/mdm2/mdm4 inhibitors, and pharmaceutical agents including inhibitors of the phosphoinositide-3-kinase pathway and the anti-seizure medicine, carbamazepine. Evaluation of potential new radiation dose modifying molecules to protect normal tissue includes: clonogenic radiation survival curves, assays for apoptosis and DNA repair, and irradiation-induced depletion of antioxidant stores. Studies of organ specific radioprotection and in total body irradiation-induced hematopoietic syndrome in the mouse model for protection/mitigation facilitate rational means by which to move candidate small molecule drugs along the drug discovery pipeline into clinical development.
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Affiliation(s)
- Joel S. Greenberger
- Radiation Oncology Department, University of Pittsburgh Cancer InstitutePittsburgh, PA, USA
| | - David Clump
- Radiation Oncology Department, University of Pittsburgh Cancer InstitutePittsburgh, PA, USA
| | - Valerian Kagan
- Environmental and Occupational Health Department, University of PittsburghPittsburgh, PA, USA
| | - Hülya Bayir
- Critical Care Medicine Department, University of Pittsburgh Medical CenterPittsburgh, PA, USA
| | - John S. Lazo
- Pharmacology Department, University of VirginiaCharlottesville, VA, USA
| | - Peter Wipf
- Department of Chemistry, Accelerated Chemical Discovery Center, University of PittsburghPittsburgh, PA, USA
| | - Song Li
- Pharmaceutical Science Department, University of PittsburghPittsburgh, PA, USA
| | - Xiang Gao
- Pharmaceutical Science Department, University of PittsburghPittsburgh, PA, USA
| | - Michael W. Epperly
- Radiation Oncology Department, University of Pittsburgh Cancer InstitutePittsburgh, PA, USA
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