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Carswell L, Sridharan DM, Chien LC, Hirose W, Giroux V, Nakagawa H, Pluth JM. Modeling Radiation-Induced Epithelial Cell Injury in Murine Three-Dimensional Esophageal Organoids. Biomolecules 2024; 14:519. [PMID: 38785926 PMCID: PMC11118668 DOI: 10.3390/biom14050519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 04/04/2024] [Accepted: 04/23/2024] [Indexed: 05/25/2024] Open
Abstract
Esophageal squamous cell carcinoma (ESCC) is a deadly consequence of radiation exposure to the esophagus. ESCC arises from esophageal epithelial cells that undergo malignant transformation and features a perturbed squamous cell differentiation program. Understanding the dose- and radiation quality-dependence of the esophageal epithelium response to radiation may provide insights into the ability of radiation to promote ESCC. We have explored factors that may play a role in esophageal epithelial radiosensitivity and their potential relationship to ESCC risk. We have utilized a murine three-dimensional (3D) organoid model that recapitulates the morphology and functions of the stratified squamous epithelium of the esophagus to study persistent dose- and radiation quality-dependent changes. Interestingly, although high-linear energy transfer (LET) Fe ion exposure induced a more intense and persistent alteration of squamous differentiation and 53BP1 DNA damage foci levels as compared to Cs, the MAPK/SAPK stress pathway signaling showed similar altered levels for most phospho-proteins with both radiation qualities. In addition, the lower dose of high-LET exposure also revealed nearly the same degree of morphological changes, even though only ~36% of the cells were predicted to be hit at the lower 0.1 Gy dose, suggesting that a bystander effect may be induced. Although p38 and ERK/MAPK revealed the highest levels following high-LET exposure, the findings reveal that even a low dose (0.1 Gy) of both radiation qualities can elicit a persistent stress signaling response that may critically impact the differentiation gradient of the esophageal epithelium, providing novel insights into the pathogenesis of radiation-induced esophageal injury and early stage esophageal carcinogenesis.
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Affiliation(s)
| | | | - Lung-Chang Chien
- Department of Epidemiology and Biostatistics, University of Nevada, Las Vegas, NV 89154, USA;
| | - Wataru Hirose
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10032, USA; (W.H.); (H.N.)
| | - Véronique Giroux
- Department of Immunology and Cell Biology, Universite de Sherbrooke, Sherbrooke, QC J1E 4K8, Canada;
| | - Hiroshi Nakagawa
- Herbert Irving Comprehensive Cancer Center, Columbia University, New York, NY 10032, USA; (W.H.); (H.N.)
- Digestive and Liver Diseases Research Center, Organoid & Cell Culture Core, Columbia University, New York, NY 10032, USA
| | - Janice M. Pluth
- Health Physics and Diagnostic Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
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Mano SS, Uto K, Ebara M. Fluidity of Poly (ε-Caprolactone)-Based Material Induces Epithelial-to-Mesenchymal Transition. Int J Mol Sci 2020; 21:E1757. [PMID: 32143443 PMCID: PMC7084864 DOI: 10.3390/ijms21051757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/26/2020] [Accepted: 02/27/2020] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND We propose the potential studies on material fluidity to induce epithelial to mesenchymal transition (EMT) in MCF-7 cells. In this study, we examined for the first time the effect of material fluidity on EMT using poly(ε-caprolactone-co-D,L-lactide) (P(CL-co-DLLA)) with tunable elasticity and fluidity. METHODS The fluidity was altered by chemically crosslinking the polymer networks. The crosslinked P(CL-co-DLLA) substrate showed a solid-like property with a stiffness of 261 kPa, while the non-crosslinked P(CL-co-DLLA) substrate of 100 units (high fluidity) and 500 units (low fluidity) existed in a quasi-liquid state with loss modulus of 33 kPa and 30.8 kPa, respectively, and storage modulus of 10.8 kPa and 20.1 kPa, respectively. RESULTS We observed that MCF-7 cells on low fluidic substrates decreased the expression of E-cadherin, an epithelial marker, and increased expression of vimentin, a mesenchymal marker. This showed that the cells lose their epithelial phenotype and gain a mesenchymal property. On the other hand, MCF-7 cells on high fluidic substrates maintained their epithelial phenotype, suggesting that the cells did not undergo EMT. CONCLUSION Considering these results as the fundamental information for material fluidity induced EMT, our system could be used to regulate the degree of EMT by turning the fluidity of the material.
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Affiliation(s)
- Sharmy Saimon Mano
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;
| | - Koichiro Uto
- International Center for Young Scientist (ICYS), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;
| | - Mitsuhiro Ebara
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
- Graduate School of Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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Presence of Stromal Cells Enhances Epithelial-to-Mesenchymal Transition (EMT) Induction in Lung Bronchial Epithelium after Protracted Exposure to Oxidative Stress of Gamma Radiation. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4120379. [PMID: 31583039 PMCID: PMC6754954 DOI: 10.1155/2019/4120379] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/19/2019] [Accepted: 07/23/2019] [Indexed: 02/03/2023]
Abstract
The aim of the study was to investigate the role of a microenvironment in the induction of epithelial-to-mesenchymal transition (EMT) as a sign of early stages of carcinogenesis in human lung epithelial cell lines after protracted low-dose rate γ-radiation exposures. BEAS-2B and HBEC-3KT lung cell lines were irradiated with low-dose rate γ-rays (137Cs, 1.4 or 14 mGy/h) to 0.1 or 1 Gy with or without adding TGF-β. TGF-β-treated samples were applied as positive EMT controls and tested in parallel to find out if the radiation has a potentiating effect on the EMT induction. To evaluate the effect of the stromal component, the epithelial cells were irradiated in cocultures with stromal MRC-9 lung fibroblasts. On day 3 post treatment, the EMT markers: α-SMA, vimentin, fibronectin, and E-cadherin, were analyzed. The oxidative stress levels were evaluated by 8-oxo-dG analysis in both epithelial and fibroblast cells. The protracted exposure to low Linear Energy Transfer (LET) radiation at the total absorbed dose of 1 Gy was able to induce changes suggestive of EMT. The results show that the presence of the stromal component and its signaling (TGF-β) in the cocultures enhances the EMT. Radiation had a minor cumulative effect on the TGF-β-induced EMT with both doses. The oxidative stress levels were higher than the background in both epithelial and stromal cells post chronic irradiation (0.1 and 1 Gy); as for the BEAS-2B cell line, the increase was statistically significant. We suggest that the induction of EMT in bronchial epithelial cells by radiation requires more than single acute exposure and the presence of stromal component might enhance the effect through free radical production and accumulation.
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Amundson SA. Gene Expression Studies for the Development of Particle Therapy. Int J Part Ther 2018; 5:49-59. [PMID: 30555854 PMCID: PMC6292674 DOI: 10.14338/ijpt-18-00010.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 06/26/2018] [Indexed: 01/02/2023] Open
Abstract
Proton therapy for cancer is now in widespread use, and facilities for carbon ion therapy are showing great promise, but a more complete understanding of the mechanisms underlying particle radiation therapy is still needed in order to optimize treatment. Studies of gene expression, especially those using whole genome techniques, can provide insight into many of the questions still remaining, from the molecular mechanisms involved to predicting patient outcome. This review will summarize gene expression studies of response to proton and carbon ion beams, as well as high-energy protons and high-z high-energy particles with relevance to particle therapy. In general, most such studies find that, in comparison with x-ray or gamma-ray exposure, particle irradiation increases both the number of genes responding and the magnitude of the response. Patterns of gene expression have suggested impacts on specific pathways of relevance to radiation therapy, such as enhancement or suppression of tumor progression or metastasis. However, even within the relatively small number of studies done to date there is no clear consensus of response, suggesting influence by multiple parameters, such as particle type, particle energy, and tumor type. Systematic gene expression studies can help to address these issues, and promoting a culture of data sharing will expedite the process, benefiting investigators across the radiation therapy field.
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Affiliation(s)
- Sally A. Amundson
- Center for Radiological Research, Columbia University Medical Center, New York, NY, USA
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Abstract
The aim of this study was to explore the role of TGF-β1/Smad4 signalling in the DNA damage-induced ionization radiation (IR) resistance of glioma cells. T98G cells were assigned to the IR group (treated with IR) or the Blank group (with no treatment). The IR-treated cells were also treated/transfected with the TGF-β receptor inhibitor SB431542, SUMO1-overexpressing plasmids (SUMO1 group), SUMO1-interfering plasmids (si-SUMO1 group) or negative control plasmids group. The wound-healing capacity, cell proliferation and cell apoptosis were evaluated by the scratch assay, flow cytometry and the CCK-8 assay, respectively, and protein interactions were investigated by coimmunoprecipitation and colocalization assays. IR-treated T98G cells had DNA damage, but the wound-healing capacity and cell apoptosis were not significantly suppressed. DNA damage also induced TGF-β1, Smad4, SUMO1, SUMO2/3 and Ubc9 expression. In IR-treated cells cultured with SB431542, the wound-healing capacity and proliferation were promoted. SUMO1 and Smad4 colocalized in the nucleus of T98G cells, and the IR-treated cells had a significantly higher expression of the SUMO1-Smad4 protein complex. Smad4 expression in the nucleus was significantly reduced in the si-SUMO1 group, but was markedly increased in the SUMO1 group; the SUMO1 group had significantly elevated apoptotic activity, whereas the si-SUMO1 group showed significantly suppressed apoptotic activity and the si-SUMO1+SB41542 group had the lowest levels of cell apoptosis. DNA damage may activate Smad4 SUMOylation and the SUMOylation of Smad4 participates in the activation of TGF-β/Smad4 signalling; therefore, enhanced Smad4 SUMOylation is critical for the damage-induced activation of IR resistance.
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Kanamoto A, Ninomiya I, Harada S, Tsukada T, Okamoto K, Nakanuma S, Sakai S, Makino I, Kinoshita J, Hayashi H, Oyama K, Miyashita T, Tajima H, Takamura H, Fushida S, Ohta T. Valproic acid inhibits irradiation-induced epithelial-mesenchymal transition and stem cell-like characteristics in esophageal squamous cell carcinoma. Int J Oncol 2016; 49:1859-1869. [PMID: 27826618 PMCID: PMC5063503 DOI: 10.3892/ijo.2016.3712] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 08/10/2016] [Indexed: 12/14/2022] Open
Abstract
Esophageal carcinoma is one of the most aggressive malignancies, and is characterized by poor response to current therapy and a dismal survival rate. In this study we investigated whether irradiation induces epithelial-mesenchymal transition (EMT) in esophageal squamous cell carcinoma (ESCC) TE9 cells and whether the classic histone deacetylase (HDAC) inhibitor valproic acid (VPA) suppresses these changes. First, we showed that 2 Gy irradiation induced spindle cell-like morphologic changes, decreased expression of membranous E-cadherin, upregulated vimentin expression, and altered the localization of β-catenin from its usual membrane-bound location to cytoplasm in TE9 cells. Irradiation induced upregulation of transcription factors including Slug, Snail, and Twist, which regulate EMT. Stimulation by irradiation resulted in increased TGF-β1 and HIF-1α expression and induced Smad2 and Smad3 phosphorylation. Furthermore, irradiation enhanced CD44 expression, indicating acquisition of cancer stem-like cell properties. In addition, irradiation enhanced invasion and migration ability with upregulation of matrix metalloproteinases. These findings indicate that single-dose irradiation can induce EMT in ESCC cells. Second, we found that treatment with 1 mM VPA induced reversal of EMT caused by irradiation in TE9 cells, resulting in attenuated cell invasion and migration abilities. These results suggest that VPA might have clinical value to suppress irradiation-induced EMT. The reversal of EMT by HDAC inhibitors may be a new therapeutic strategy to improve the effectiveness of radiotherapy in ESCC by inhibiting the enhancement of invasion and metastasis.
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Affiliation(s)
- Ayako Kanamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Itasu Ninomiya
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Shinichi Harada
- Center for Biomedical Research and Education, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Tomoya Tsukada
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Koichi Okamoto
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Shinichi Nakanuma
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Seisho Sakai
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Isamu Makino
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Jun Kinoshita
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Hironori Hayashi
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Katsunobu Oyama
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Tomoharu Miyashita
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Hidehiro Tajima
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Hiroyuki Takamura
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Sachio Fushida
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
| | - Tetsuo Ohta
- Department of Gastroenterological Surgery, Graduate School of Medical Science, Kanazawa University, Kanazawa, Ishikawa 920-8641, Japan
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KWON YUNSUK, LEE KYUSHIK, CHUN SOYOUNG, JANG TAEJUNG, NAM KYUNGSOO. Suppressive effects of a proton beam on tumor growth and lung metastasis through the inhibition of metastatic gene expression in 4T1 orthotopic breast cancer model. Int J Oncol 2016; 49:336-42. [DOI: 10.3892/ijo.2016.3520] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 04/25/2016] [Indexed: 11/05/2022] Open
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Peterson LE, Kovyrshina T. Adjustment of lifetime risks of space radiation-induced cancer by the healthy worker effect and cancer misclassification. Heliyon 2015; 1:e00048. [PMID: 27441231 PMCID: PMC4945756 DOI: 10.1016/j.heliyon.2015.e00048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/13/2015] [Accepted: 11/10/2015] [Indexed: 01/12/2023] Open
Abstract
Background. The healthy worker effect (HWE) is a source of bias in occupational studies of mortality among workers caused by use of comparative disease rates based on public data, which include mortality of unhealthy members of the public who are screened out of the workplace. For the US astronaut corp, the HWE is assumed to be strong due to the rigorous medical selection and surveillance. This investigation focused on the effect of correcting for HWE on projected lifetime risk estimates for radiation-induced cancer mortality and incidence. Methods. We performed radiation-induced cancer risk assessment using Poisson regression of cancer mortality and incidence rates among Hiroshima and Nagasaki atomic bomb survivors. Regression coefficients were used for generating risk coefficients for the excess absolute, transfer, and excess relative models. Excess lifetime risks (ELR) for radiation exposure and baseline lifetime risks (BLR) were adjusted for the HWE using standardized mortality ratios (SMR) for aviators and nuclear workers who were occupationally exposed to ionizing radiation. We also adjusted lifetime risks by cancer mortality misclassification among atomic bomb survivors. Results. For all cancers combined (“Nonleukemia”), the effect of adjusting the all-cause hazard rate by the simulated quantiles of the all-cause SMR resulted in a mean difference (not percent difference) in ELR of 0.65% and mean difference of 4% for mortality BLR, and mean change of 6.2% in BLR for incidence. The effect of adjusting the excess (radiation-induced) cancer rate or baseline cancer hazard rate by simulated quantiles of cancer-specific SMRs resulted in a mean difference of −1.2% in the all-cancer mortality ELR and mean difference of −6.4% in the mortality BLR. Whereas for incidence, the effect of adjusting by cancer-specific SMRs resulted in a mean change of −14.4% for the all-cancer BLR. Only cancer mortality risks were adjusted by simulated quantiles for misclassification, and results indicate a mean change of 1.1% for all-cancer mortality ELR, while the mean change in the all-cancer PC was approximately 4% for males and 6% for females. Conclusions. The typical life table approach for projecting lifetime risk of radiation-induced cancer mortality and incidence for astronauts and radiation workers can be improved by adjusting for HWE while simulating the uncertainty of input rates, input excess risk coefficients, and bias correction factors during multiple Monte Carlo realizations of the life table.
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Affiliation(s)
- Leif E Peterson
- Center for Biostatistics, Houston Methodist Research Institute, 6565 Fannin Street, Suite MGJ6-031, Houston, TX 77030, United States
| | - Tatiana Kovyrshina
- Center for Biostatistics, Houston Methodist Research Institute, 6565 Fannin Street, Suite MGJ6-031, Houston, TX 77030, United States
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Euphol from Euphorbia tirucalli Negatively Modulates TGF-β Responsiveness via TGF-β Receptor Segregation inside Membrane Rafts. PLoS One 2015; 10:e0140249. [PMID: 26448474 PMCID: PMC4598150 DOI: 10.1371/journal.pone.0140249] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 09/23/2015] [Indexed: 01/07/2023] Open
Abstract
Transforming growth factor-β (TGF-β) responsiveness in cultured cells can be modulated by TGF-β partitioning between lipid raft/caveolae- and clathrin-mediated endocytosis pathways. Lipid rafts are plasma membrane microdomains with an important role in cell survival signaling, and cholesterol is necessary for the lipid rafts’ structure and function. Euphol is a euphane-type triterpene alcohol that is structurally similar to cholesterol and has a wide range of pharmacological properties, including anti-inflammatory and anti-cancer effects. In the present study, euphol suppressed TGF-β signaling by inducing TGF-β receptor movement into lipid-raft microdomains and degrading TGF-β receptors.
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Girdhani S, Sachs R, Hlatky L. Biological effects of proton radiation: an update. RADIATION PROTECTION DOSIMETRY 2015; 166:334-338. [PMID: 25897135 DOI: 10.1093/rpd/ncv178] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Proton radiation provides significant dosimetric advantages when compared with gamma radiation due to its superior energy deposition characteristics. Although the physical aspects of proton radiobiology are well understood, biological and clinical endpoints are understudied. The current practice to assume the relative biological effectiveness of low linear energy transfer (LET) protons to be a generic value of about 1.1 relative to photons likely obscures important unrecognised differentials in biological response between these radiation qualities. A deeper understanding of the biological properties induced by proton radiation would have both radiobiological and clinical impact. This article briefly points to some of the literature pertinent to the effects of protons on tissue-level processes that modify disease progression, such as angiogenesis, cell invasion and cancer metastasis. Recent findings hint that proton radiation may, in addition to offering improved radio-therapeutic targeting, be a means to provide a new dimension for increasing therapeutic benefits for patients by manipulating these tissue-level processes.
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Affiliation(s)
- S Girdhani
- Center of Cancer Systems Biology, GRI, Tufts University School of Medicine, Boston, MA, USA
| | - R Sachs
- Center of Cancer Systems Biology, GRI, Tufts University School of Medicine, Boston, MA, USA Department of Mathematics, University of California, Berkeley, CA, USA
| | - L Hlatky
- Center of Cancer Systems Biology, GRI, Tufts University School of Medicine, Boston, MA, USA
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Narang H, Kumar A, Bhat N, Pandey BN, Ghosh A. Effect of proton and gamma irradiation on human lung carcinoma cells: Gene expression, cell cycle, cell death, epithelial-mesenchymal transition and cancer-stem cell trait as biological end points. Mutat Res 2015; 780:35-46. [PMID: 26278043 DOI: 10.1016/j.mrfmmm.2015.07.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Revised: 06/12/2015] [Accepted: 07/13/2015] [Indexed: 12/25/2022]
Abstract
Proton beam therapy is a cutting edge modality over conventional gamma radiotherapy because of its physical dose deposition advantage. However, not much is known about its biological effects vis-a-vis gamma irradiation. Here we investigated the effect of proton- and gamma- irradiation on cell cycle, death, epithelial-mesenchymal transition (EMT) and "stemness" in human non-small cell lung carcinoma cells (A549). Proton beam (3MeV) was two times more cytotoxic than gamma radiation and induced higher and longer cell cycle arrest. At equivalent doses, numbers of genes responsive to proton irradiation were ten times higher than those responsive to gamma irradiation. At equitoxic doses, the proton-irradiated cells had reduced cell adhesion and migration ability as compared to the gamma-irradiated cells. It was also more effective in reducing population of Cancer Stem Cell (CSC) like cells as revealed by aldehyde dehydrogenase activity and surface phenotyping by CD44(+), a CSC marker. These results can have significant implications for proton therapy in the context of suppression of molecular and cellular processes that are fundamental to tumor expansion.
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Affiliation(s)
- Himanshi Narang
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
| | - Amit Kumar
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | - Badri N Pandey
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Anu Ghosh
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Saha J, Wilson P, Thieberger P, Lowenstein D, Wang M, Cucinotta FA. Biological characterization of low-energy ions with high-energy deposition on human cells. Radiat Res 2014; 182:282-91. [PMID: 25098728 DOI: 10.1667/rr13747.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
During space travel, astronauts are exposed to cosmic radiation that is comprised of high-energy nuclear particles. Cancer patients are also exposed to high-energy nuclear particles when treated with proton and carbon beams. Nuclear interactions from high-energy particles traversing shielding materials and tissue produce low-energy (<10 MeV/n) secondary particles of high-LET that contribute significantly to overall radiation exposures. Track structure theories suggest that high charge and energy (HZE) particles and low-energy secondary ions of similar LET will have distinct biological effects for cellular and tissue damage endpoints. We investigated the biological effects of low-energy ions of high LET utilizing the Tandem Van de Graaff accelerator at the Brookhaven National Laboratory (BNL), and compared these to experiments with HZE particles, that mimic the space environment produced at NASA Space Radiation Laboratory (NSRL) at BNL. Immunostaining for DNA damage response proteins was carried out after irradiation with 5.6 MeV/n boron (LET 205 keV/μm), 5.3 MeV/n silicon (LET 1241 keV/μm), 600 MeV/n Fe (LET 180 keV/μm) and 77 MeV/n oxygen (LET 58 keV/μm) particles. Low-energy ions caused more persistent DNA damage response (DDR) protein foci in irradiated human fibroblasts and esophageal epithelial cells compared to HZE particles. More detailed studies comparing boron ions to Fe particles, showed that boron-ion radiation resulted in a stronger G2 delay compared to Fe-particle exposure, and boron ions also showed an early recruitment of Rad51 at double-strand break (DSB) sites, which suggests a preference of homologous recombination for DSB repair in low-energy albeit high-LET particles. Our experiments suggest that the very high-energy radiation deposition by low-energy ions, representative of galactic cosmic radiation and solar particle event secondary radiation, generates massive but localized DNA damage leading to delayed DSB repair, and distinct cellular responses from HZE particles. Thus, low-energy heavy ions provide a valuable probe for studies of homologous recombination repair in radiation responses.
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Affiliation(s)
- Janapriya Saha
- a Division of Space Life Sciences, Universities Space Research Association, Houston, Texas
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13
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Tinhofer I, Saki M, Niehr F, Keilholz U, Budach V. Cancer stem cell characteristics of circulating tumor cells. Int J Radiat Biol 2014; 90:622-7. [PMID: 24460132 DOI: 10.3109/09553002.2014.886798] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE To review the results from previous studies aiming at the molecular characterization of circulating tumor cells (CTC), to specifically address the role of epithelial-mesenchymal-transition (EMT) and stemness features of CTC in their contribution to tumor progression and to summarize potential interference of CTC with the efficacy of radiotherapy. CONCLUSIONS Detection of CTC has been reported for most epithelial tumors and has been associated with an increased risk of local and regional recurrence as well as the development of distant metastases. Given a causal relationship between the presence of CTC and tumor progression at the primary or distant sites, several distinct features have to be postulated for these cells: First, a change from an epithelial to a mesenchymal cell-like phenotype which should alleviate the disconnection of individual tumor cells from tight cell-to-cell junctions within the epithelial cell layer and endow single tumor cells with the capacity to migrate into blood vessels; secondly, the presence of stem-cell properties which contribute to the re-establishment of bulk tumor tissue at the primary or metastatic site upon tumor recurrence or distant progression, respectively. Indeed, EMT and stem-cell features were frequently observed in CTC and the phenotype of CTC was established as a stronger predictor of outcome than sole enumeration of CTC in a defined volume of blood. The exploitation of CTC above their use as prognostic marker is still a subject of many ongoing investigations as are the identification of suitable therapeutic targets for this small cell subpopulation.
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Affiliation(s)
- Ingeborg Tinhofer
- Translational Radiooncology and Radiobiology Research Laboratory, Department of Radiooncology and Radiotherapy
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14
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Beheshti A, Peluso M, Lamont C, Hahnfeldt P, Hlatky L. Proton irradiation augments the suppression of tumor progression observed with advanced age. Radiat Res 2014; 181:272-83. [PMID: 24568128 DOI: 10.1667/rr13538.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Proton radiation is touted for improved tumor targeting, over standard gamma radiation, due to the physical advantages of ion beams for radiotherapy. Recent studies from our laboratory demonstrate that in addition to these targeting advantages, proton irradiation can inhibit angiogenic and immune factors critical to "hallmark" processes that impact cancer progression, thereby modulating tumor development. Outside the therapeutic utilization of protons, high-energy protons constitute a principal component of galactic cosmic rays and thus are a consideration in carcinogenesis risk for space flight. Given that proton irradiation modulates fundamental biological processes known to decrease with aging (e.g. angiogenesis and immunogenicity), we investigated how proton irradiation impacts tumor advancement as a function of host age, a question with both therapeutic and carcinogenesis implications. Tumor lag time and growth dynamics were tracked, after injection of murine Lewis lung carcinoma (LLC) cells into syngeneic adolescent (68 day) vs. old (736 day) C57BL/6 mice with or without coincident irradiation. Tumor growth was suppressed in old compared to adolescent mice. These differences were further modulated by proton irradiation (1 GeV), with increased inhibition and a significant radiation-altered molecular fingerprint evident in tumors grown in old mice. Through global transcriptome analysis, TGFβ1 and TGFβ2 were determined to be key players that contributed to the tumor dynamics observed. These findings suggest that old hosts exhibit a reduced capacity to support tumor advancement, which can be further reduced by proton irradiation.
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Affiliation(s)
- Afshin Beheshti
- Center of Cancer Systems Biology, GRI, Tufts University School of Medicine, Boston, Massachusetts 02135
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15
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Wang M, Saha J, Cucinotta FA. Smad7 foci are present in micronuclei induced by heavy particle radiation. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2013; 756:108-14. [DOI: 10.1016/j.mrgentox.2013.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 04/23/2013] [Indexed: 12/13/2022]
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16
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The hallmarks of cancer and the radiation oncologist: updating the 5Rs of radiobiology. Clin Oncol (R Coll Radiol) 2013; 25:569-77. [PMID: 23850153 DOI: 10.1016/j.clon.2013.06.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/06/2013] [Accepted: 06/14/2013] [Indexed: 12/17/2022]
Abstract
A comprehensive, mechanistic understanding of radiobiological phenomena that can be integrated within the broader context of cancer biology offers the prospect of transforming clinical practice in radiation oncology. In this review, we revisit the six established biological hallmarks of cancer and examine how they have provided insights into novel therapeutic strategies. In addition, we discuss the potential of two emerging hallmarks to continue to expand our understanding beyond the narrow confines of the traditional 5Rs of radiobiology.
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17
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Wang M, Saha J, Hada M, Anderson JA, Pluth JM, O’Neill P, Cucinotta FA. Novel Smad proteins localize to IR-induced double-strand breaks: interplay between TGFβ and ATM pathways. Nucleic Acids Res 2013; 41:933-42. [PMID: 23221633 PMCID: PMC3553971 DOI: 10.1093/nar/gks1038] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/01/2012] [Accepted: 10/06/2012] [Indexed: 01/03/2023] Open
Abstract
Cellular damage from ionizing radiation (IR) is in part due to DNA damage and reactive oxygen species, which activate DNA damage response (DDR) and cytokine signaling pathways, including the ataxia telangiectasia mutated (ATM) and transforming growth factor (TGF)β/Smad pathways. Using classic double-strand breaks (DSBs) markers, we studied the roles of Smad proteins in DDR and the crosstalk between TGFβ and ATM pathways. We observed co-localization of phospho-Smad2 (pSmad2) and Smad7 with DSB repair proteins following low and high linear energy transfer (LET) radiation in human fibroblasts and epithelial cells. The decays of both foci were similar to that of γH2AX foci. Irradiation with high LET particles induced pSmad2 and Smad7 foci tracks indicating the particle trajectory through cells. pSmad2 foci were absent in S phase cells, while Smad7 foci were present in all phases of cell cycle. pSmad2 (but not Smad7) foci were completely abolished when ATM was depleted or inactivated. In contrast, a TGFβ receptor 1 (TGFβR1) inhibitor abrogated Smad7, but not pSmad2 foci at DSBs sites. In summary, we suggest that Smad2 and Smad7 contribute to IR-induced DSB signaling in an ATM or TGFβR1-dependent manner, respectively.
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Affiliation(s)
- Minli Wang
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Janapriya Saha
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Megumi Hada
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Jennifer A. Anderson
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Janice M. Pluth
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Peter O’Neill
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
| | - Francis A. Cucinotta
- USRA Division of Life Sciences, Houston, TX 77058, USA, Gray Institute for Radiation Oncology and Biology, Oxford University, Oxford OX37DQ, UK, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA and NASA Space Radiation Program, Lyndon B. Johnson Space Center, Houston, TX 77058, USA
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