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Howe O, Lyng FM, Mothersill C. Women's contributions to radiobiology in Ireland; from small beginnings…. Int J Radiat Biol 2021; 98:331-340. [PMID: 34010091 DOI: 10.1080/09553002.2021.1931529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To describe the contribution of women radiobiologists in Ireland to the development of the discipline internationally and at home and to discuss the history of radiobiology in Ireland to date. This parallels the history of the evolution of a small radiobiology group in Kevin Street, Dublin Institute of Technology (DIT) which was formerly part of the City of Dublin Vocational Education Committee. There followed years of development first as a radiobiological research center which evolved in the FOCAS Research Institute now embedded within Technological University Dublin (TU Dublin). CONCLUSIONS Over the last 45 years, the women of the Radiation and Environmental Science Centre (RESC) contributed to the major paradigm shift in low dose radiobiology contributing exciting new research concerning non-targeted effects, including discovery of lethal mutations, medium transfer bystander mechanisms, and signaling pathways. They also developed translational research using human explant culture systems with unique immunocytochemical methods and more recently evolved to molecular and spectroscopic analysis of clinical samples. The RESC also developed unique in vitro research methods into effects of radiation on non-human species of concern in ecosystems.
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Affiliation(s)
- Orla Howe
- School of Biological and Health Sciences, Technological University Dublin, Dublin, Ireland.,Radiation and Environmental Science Centre, FOCAS Research Institute, Dublin, Ireland
| | - Fiona M Lyng
- Radiation and Environmental Science Centre, FOCAS Research Institute, Dublin, Ireland.,School of Physics & Clinical & Optometric Sciences, Technological University Dublin, Dublin, Ireland
| | - Carmel Mothersill
- Radiation and Environmental Science Centre, FOCAS Research Institute, Dublin, Ireland.,Department of Biology, Life Sciences building, McMaster University, Hamilton, Canada
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Hanu C, Wong R, Sur RK, Hayward JE, Seymour C, Mothersill C. Low-dose non-targeted radiation effects in human esophageal adenocarcinoma cell lines. Int J Radiat Biol 2016; 93:165-173. [PMID: 27653785 DOI: 10.1080/09553002.2017.1237057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
PURPOSE To investigate non-targeted radiation effects in esophageal adenocarcinoma cell lines (OE19 and OE33) using human keratinocyte and colorectal cancer cell reporters following γ-ray exposure. MATERIALS AND METHODS Both clonogenic assays and ratiometric calcium endpoints were used to check for the occurrence of bystander signals in reporter cells. RESULTS We report data suggesting that γ-irradiation increases cell killing over the expected linear quadratic (LQ) model levels in the OE19 cell line exposed to doses below 1 Gy, i.e. which may be suggestive to be a low hyper-radiosensitive (HRS) response to direct irradiation. Both EAC cell lines (OE19 and OE33) have the ability to produce bystander signals when irradiated cell conditioned medium (ICCM) is placed onto human keratinocyte reporters, but do not seem to be capable of responding to bystander signals when placed on their autologous reporters. Further work with human keratinocyte reporter models showed statistically significant intracellular calcium fluxes following exposure of the reporters to ICCM harvested from both EAC cell lines exposed to 0.5 Gy. CONCLUSION These experiments suggest that the OE19 and OE33 cell lines produce bystander signals in human keratinocyte reporter cells. However, the radiosensitivity of the EAC cell lines used in this study cannot be enhanced by the bystander response since both cell lines could not respond to bystander signals.
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Affiliation(s)
- Christine Hanu
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
| | - Raimond Wong
- b Department of Oncology and McMaster University , Hamilton , ON , Canada
| | - Ranjan K Sur
- b Department of Oncology and McMaster University , Hamilton , ON , Canada
| | - Joseph E Hayward
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada.,c Department of Radiology , McMaster University , Hamilton , ON , Canada
| | - Colin Seymour
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
| | - Carmel Mothersill
- a Medical Physics & Applied Radiation Sciences , McMaster University , Hamilton , ON , Canada
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Desai S, Srambikkal N, Yadav HD, Shetake N, Balla MMS, Kumar A, Ray P, Ghosh A, Pandey BN. Molecular Understanding of Growth Inhibitory Effect from Irradiated to Bystander Tumor Cells in Mouse Fibrosarcoma Tumor Model. PLoS One 2016; 11:e0161662. [PMID: 27561007 PMCID: PMC4999205 DOI: 10.1371/journal.pone.0161662] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 08/09/2016] [Indexed: 12/21/2022] Open
Abstract
Even though bystander effects pertaining to radiation risk assessment has been extensively studied, the molecular players of radiation induced bystander effect (RIBE) in the context of cancer radiotherapy are poorly known. In this regard, the present study is aimed to investigate the effect of irradiated tumor cells on the bystander counterparts in mouse fibrosarcoma (WEHI 164 cells) tumor model. Mice co-implanted with WEHI 164 cells γ-irradiated with a lethal dose of 15 Gy and unirradiated (bystander) WEHI 164 cells showed inhibited tumor growth, which was measured in terms of tumor volume and Luc+WEHI 164 cells based bioluminescence in vivo imaging. Histopathological analysis and other assays revealed decreased mitotic index, increased apoptosis and senescence in these tumor tissues. In addition, poor angiogenesis was observed in these tumor tissues, which was further confirmed by fluorescence imaging of tumor vascularisation and CD31 expression by immuno-histochemistry. Interestingly, the growth inhibitory bystander effect was exerted more prominently by soluble factors obtained from the irradiated tumor cells than the cellular fraction. Cytokine profiling of the supernatants obtained from the irradiated tumor cells showed increased levels of VEGF, Rantes, PDGF, GMCSF and IL-2 and decreased levels of IL-6 and SCF. Comparative proteomic analysis of the supernatants from the irradiated tumor cells showed differential expression of total 24 protein spots (21 up- and 3 down-regulated) when compared with the supernatant from the unirradiated control cells. The proteins which showed substantially higher level in the supernatant from the irradiated cells included diphosphate kinase B, heat shock cognate, annexin A1, angiopoietin-2, actin (cytoplasmic 1/2) and stress induced phosphoprotein 1. However, the levels of proteins like annexin A2, protein S100 A4 and cofilin was found to be lower in this supernatant. In conclusion, our results provided deeper insight about the damaging RIBE in an in vivo tumor model, which may have significant implication in improvement of cancer radiotherapy.
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Affiliation(s)
- Sejal Desai
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
- Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Nishad Srambikkal
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Hansa D. Yadav
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Neena Shetake
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Murali M. S. Balla
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
| | - Amit Kumar
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
- Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Pritha Ray
- Advanced Centre for Training, Research and Education of Cancer, Tata Memorial Centre, Kharghar, Navi Mumbai, Maharashtra, India
- Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - Anu Ghosh
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
- Homi Bhabha National Institute, Mumbai, Maharashtra, India
| | - B. N. Pandey
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai, Maharashtra, India
- Homi Bhabha National Institute, Mumbai, Maharashtra, India
- * E-mail: ;
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Hanu C, Timotin E, Wong R, Sur RK, Hayward JE, Seymour CB, Mothersill CE. The influence of smoking on radiation-induced bystander signal production in esophageal cancer patients. ENVIRONMENTAL RESEARCH 2016; 147:565-571. [PMID: 26750714 DOI: 10.1016/j.envres.2015.12.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 12/21/2015] [Accepted: 12/24/2015] [Indexed: 06/05/2023]
Abstract
The relevance of radiation-induced bystander effects in humans is unclear. Much of the existing data relate to cell lines but the effect of bystander signals in complex human tissues is unclear. A phase II clinical study was untaken, where blood sera from 60 patients along with 15 cancer-free volunteers were used to detect whether measurable bystander factor(s) could be found in the blood following high dose rate (HDR) brachytherapy. Overall, there was no significant change in bystander signal production (measured in a human keratinocyte reporter system) before and after one treatment fraction of HDR brachytherapy (p>0.05). Further assessment of patient characteristics and environmental modifiable factors including smoking were also analyzed. Similar to previously published data, samples taken from smokers produced weaker signals compared to non-smokers (p<0.05). Although the number of non-smoking subjects was low, there was a clear decrease in cloning efficiency observed in keratinocyte cultures for these patients that requires further study. This study found that samples taken from smokers do not produce bystander signals, whereas samples taken from non-smokers can produce such signals following HDR brachytherapy. These findings highlight the importance of studying the interactions of multiple stressors including environmental modifiers with radiation, since some factors such as smoking may elicit protection in tumor cells which could counteract the effectiveness of radiation therapy.
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Affiliation(s)
- C Hanu
- Medical Physics & Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada.
| | - E Timotin
- Medical Physics & Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada
| | - R Wong
- Department of Oncology, McMaster University, Hamilton, ON, Canada
| | - R K Sur
- Department of Oncology, McMaster University, Hamilton, ON, Canada
| | - J E Hayward
- Medical Physics & Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada; Department of Radiology, McMaster University, Hamilton, ON, Canada
| | - C B Seymour
- Medical Physics & Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada
| | - C E Mothersill
- Medical Physics & Applied Radiation Sciences, McMaster University, Hamilton, ON, Canada
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