1
|
Wei X, Yi J, Zhang C, Wang M, Wang R, Xu W, Zhao M, Zhao M, Yang T, Wei W, Jin S, Gao H. Enhancement of the Tumor Suppression Effect of High-dose Radiation by Low-dose Pre-radiation Through Inhibition of DNA Damage Repair and Increased Pyroptosis. Dose Response 2024; 22:15593258241245804. [PMID: 38617388 PMCID: PMC11010768 DOI: 10.1177/15593258241245804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 03/21/2024] [Indexed: 04/16/2024] Open
Abstract
Radiation therapy has been a critical and effective treatment for cancer. However, not all cells are destroyed by radiation due to the presence of tumor cell radioresistance. In the current study, we investigated the effect of low-dose radiation (LDR) on the tumor suppressive effect of high-dose radiation (HDR) and its mechanism from the perspective of tumor cell death mode and DNA damage repair, aiming to provide a foundation for improving the efficacy of clinical tumor radiotherapy. We found that LDR pre-irradiation strengthened the HDR-inhibited A549 cell proliferation, HDR-induced apoptosis, and G2 phase cell cycle arrest under co-culture conditions. RNA-sequencing showed that differentially expressed genes after irradiation contained pyroptosis-related genes and DNA damage repair related genes. By detecting pyroptosis-related proteins, we found that LDR could enhance HDR-induced pyroptosis. Furthermore, under co-culture conditions, LDR pre-irradiation enhances the HDR-induced DNA damage and further suppresses the DNA damage-repairing process, which eventually leads to cell death. Lastly, we established a tumor-bearing mouse model and further demonstrated that LDR local pre-irradiation could enhance the cancer suppressive effect of HDR. To summarize, our study proved that LDR pre-irradiation enhances the tumor-killing function of HDR when cancer cells and immune cells were coexisting.
Collapse
Affiliation(s)
- Xinfeng Wei
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Junxuan Yi
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Citong Zhang
- Department of Oral Comprehensive Therapy, School of Stomatology, Jilin University, Changchun, China
| | - Mingwei Wang
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Rui Wang
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Weiqiang Xu
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Mingqi Zhao
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Mengdie Zhao
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Teng Yang
- Department of Orthopedics, The First Hospital of Jilin University, Changchun, China
| | - Wei Wei
- Department of Radiotherapy, Chinese PLA General Hospital, Beijing, China
| | - Shunzi Jin
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
| | - Hui Gao
- NHC Key Laboratory of Radiobiology, School of Public Health, Jilin University, Changchun, China
- Department of Orthopedics, The First Hospital of Jilin University, Changchun, China
| |
Collapse
|
2
|
Gharial J, Guilcher G, Truong T, Shah R, Desai S, Rojas-Vasquez M, Kangarloo B, Lewis V. Busulfan with 400 centigray of total body irradiation and higher dose fludarabine: An alternative regimen for hematopoietic stem cell transplantation in pediatric acute lymphoblastic leukemia. Pediatr Blood Cancer 2024; 71:e30844. [PMID: 38217082 DOI: 10.1002/pbc.30844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Revised: 12/01/2023] [Accepted: 12/21/2023] [Indexed: 01/14/2024]
Abstract
BACKGROUND Hematopoietic stem cell transplantation can be curative for children with difficult-to-treat leukemia. The conditioning regimen utilized is known to influence outcomes. We report outcomes of the conditioning regimen used at the Alberta Children's Hospital, consisting of busulfan (with pharmacokinetic target of 3750 μmol*min/L/day ±10%) for 4 days, higher dose (250 mg/m2 ) fludarabine and 400 centigray (cGy) of total body irradiation. PROCEDURE This retrospective study involved children receiving transplant for acute lymphoblastic leukemia (ALL). It compared children who fell within the target range for busulfan with those who were either not measured or were measured and fell outside this range. All other treatment factors were identical. RESULTS Twenty-nine children (17 within target) were evaluated. All subjects engrafted neutrophils with a median [interquartile range] time of 14 days [8-30 days]. The cumulative incidence of acute graft-versus-host disease was 44.8% [95% confidence interval, CI: 35.6%-54.0%], while chronic graft-versus-host disease was noted in 16.0% [95% CI: 8.7%-23.3%]. At 2 years, the overall survival was 78.1% [95% CI: 70.8%-86.4%] and event-free survival was 74.7% [95% CI: 66.4%-83.0%]. Cumulative incidence of relapse was 11.3% [95% CI: 5.1%-17.5%]. There were no statistically significant differences in between the group that received targeted busulfan compared with the untargeted group. CONCLUSION Our conditioning regiment for children with ALL resulted in outcomes comparable to standard treatment with acceptable toxicities and significant reduction in radiation dose. Targeting busulfan dose in this cohort did not result in improved outcomes.
Collapse
Affiliation(s)
- Jaspreet Gharial
- Section of Pediatric Hematology Oncology and Bone Marrow Transplantation, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Gregory Guilcher
- Section of Pediatric Hematology Oncology and Bone Marrow Transplantation, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Tony Truong
- Section of Pediatric Hematology Oncology and Bone Marrow Transplantation, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Ravi Shah
- Section of Pediatric Hematology Oncology and Bone Marrow Transplantation, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Sunil Desai
- Division of Pediatric Hematology/Oncology & Palliative Care, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Marta Rojas-Vasquez
- Division of Pediatric Hematology/Oncology & Palliative Care, Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Bill Kangarloo
- Pharmacokinetic Scientist, Alberta Blood and Marrow Transplant Program, Foothills Hospital, and Tom Baker Cancer Centre, Calgary, Alberta, Canada
| | - Victor Lewis
- Section of Pediatric Hematology Oncology and Bone Marrow Transplantation, Alberta Children's Hospital, Calgary, Alberta, Canada
| |
Collapse
|
3
|
Kim JY, Lee YR, Lee YA, Song CH, Han SH, Cho SJ, Nam SY. Preventive and therapeutic effects of low-dose whole-body irradiation on collagen-induced rheumatoid arthritis in mice. J Radiat Res 2024; 65:177-186. [PMID: 38155365 PMCID: PMC10959428 DOI: 10.1093/jrr/rrad101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 08/29/2023] [Indexed: 12/30/2023]
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by progressive joint inflammation, resulting in cartilage destruction and bone erosion. It was reported that low-dose radiation modulates immune disease. Here, we investigated whether low-dose whole-body irradiation has preventive and therapeutic effects in collagen-induced RA (CIA) mouse models. Fractionated low-dose irradiation (0.05 Gy/fraction, total doses of 0.1, 0.5 or 0.8 Gy) was administered either concurrently with CIA induction by Type II collagen immunization (preventive) or after CIA development (therapeutic). The severity of CIA was monitored using two clinical parameters, paw swelling and redness. We also measured total Immunoglobulin G (IgG) and inflammatory cytokines (interleukine (IL)-6, IL-1β and tumor necrosis factor-alpha (TNF-α)) in the serum by enzyme-linked immunosorbent assay, and we evaluated histological changes in the ankle joints by immunohistochemistry and hematoxylin and eosin staining. Low-dose irradiation reduced CIA clinical scores by up to 41% in the preventive model and by 28% in the therapeutic model, while irradiation in the preventive model reduced the typical CIA incidence rate from 82 to 56%. In addition, low-dose irradiation in the preventive model decreased total IgG by up to 23% and decreased IL-1β and TNF-α by 69 and 67%, and in the therapeutic model, decreased total IgG by up to 35% and decreased IL-1β and IL-6 by 59 and 42% with statistical significance (P < 0.01, 0.05 and 0.001). Our findings demonstrate that low-dose radiation has preventive and therapeutic anti-inflammatory effects against CIA by controlling the immune response, suggesting that low-dose radiation may represent an alternative therapy for RA, a chronic degenerative immune disease.
Collapse
Affiliation(s)
- Ji Young Kim
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - Yeong Ro Lee
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - Young Ae Lee
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - Chin-Hee Song
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - So Hyun Han
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - Seong Jun Cho
- Radiation Effects Research Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| | - Seon Young Nam
- R&D Strategy & Planning Section, Radiation Health Institute, Korea Hydro & Nuclear Power Co., Ltd., Seoul 04505, Republic of Korea
| |
Collapse
|
4
|
Waligórski MPR. Letter re: "On Geraily et al - Comments". Dose Response 2024; 22:15593258231225914. [PMID: 38204760 PMCID: PMC10775722 DOI: 10.1177/15593258231225914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 11/30/2023] [Indexed: 01/12/2024] Open
Affiliation(s)
- Michael Patrick Russell Waligórski
- Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
- National Research Institute of Oncology, Kraków Division, Kraków, Poland
| |
Collapse
|
5
|
Pita A, Thacker S, Sobue T, Gandhi V, Tadinada A. Newly Developed Low Dose 180-degree CBCT Protocol Reduces Radiation Dose Without Compromising Diagnostic Value. Int J Oral Maxillofac Implants 2023; 38:1161-1167. [PMID: 38085747 DOI: 10.11607/jomi.10364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/24/2023] Open
Abstract
PURPOSE To compare the standard 360-degree CBCT acquisition protocol to the low dose 180-degree CBCT protocol for implant planning. MATERIALS AND METHODS Two groups of patients, each consisting of 35 patients, were included in the study. The first group was imaged with the conventional 360-degree CBCT protocol, and the second group was imaged with the low dose 180-degree CBCT protocol. The primary outcome of this study was the number of scans that needed to be repeated due to poor image quality. In addition, six secondary parameters were evaluated quantitatively and qualitatively. RESULTS The results showed that there was no need to repeat any of the CBCT scans that were obtained in either group, which showed that 360-degree and 180-degree protocols had comparable image quality. As for the secondary parameters, the results showed that the evaluators were able to evaluate the six chosen parameters in a comparable manner. CONCLUSIONS The 180-degree low dose CBCT scan is a viable option for dental implant treatment planning in the posterior mandible as it provides comparable and adequate information regarding accuracy of measurements, identification of critical structures, evaluation of bone quality, and any pathology.
Collapse
|
6
|
Marshall SK, Prom-on P, Sangkue S, Thiangsook W. Assessment of Radiation Exposure in a Nuclear Medicine Department during 99mTc-MDP Bone Scintigraphy. Toxics 2023; 11:814. [PMID: 37888665 PMCID: PMC10610792 DOI: 10.3390/toxics11100814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 09/20/2023] [Accepted: 09/24/2023] [Indexed: 10/28/2023]
Abstract
This study measured 99mTc-MDP bone scintigraphy radiation risks, as low-dose radiation exposure is a growing concern. Dosimeter measurements were taken at four positions (left lateral, right lateral, anterior, and posterior) around the patients at 30, 60, 100, and 200 cm at 0, 1.5, and 3 h. The highest dose rates were recorded from 51% of the patients, who emitted ≥ 25 µSv/h up to 49.00 µSv/h at the posterior location at a distance of 30 cm. Additionally, at the anterior location at a distance of 30 cm, 42% of patients emitted ≥ 25 µSv/h up to 38.00 µSv/h. Furthermore, at 1.5 h after the tracer injection, 7% of the dose rates exceeded 25 µSv/h. There was a significant reduction in mean dose rates for all positions as distance and time increased (p-value < 0.05). As a result, radiation levels decreased with increased distance and time as a result of radiation decay, biological clearance, and distance from the source. In addition, increasing the distance from the patient for all positions reduced the radiation dose, as was substantiated via exponential regression analysis. Additionally, after completing the bone scintigraphy, the patients' dose rates on discharge were within the current guidelines, and the mean radiation doses from 99mTc-MDP were below occupational limits. Thus, medical staff received less radiation than the recommended 25 μSv/h. On discharge and release to public areas, the patients' mean dose rates were as follows: 1.13 µSv/h for the left lateral position, 1.04 µSv/h for the right lateral, 1.39 µSv/h for the anterior, and 1.46 µSv/h for the posterior. This confirms that if an individual was continuously present in an unrestricted area, the dose from external sources would not exceed 20 µSv/h. Furthermore, the patients' radiation doses were below the public exposure limit on discharge.
Collapse
Affiliation(s)
- Suphalak Khamruang Marshall
- Department of Radiology, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
- Molecular Imaging and Cyclotron Center, Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
| | - Piyatida Prom-on
- Department of Physics, Faculty of Science and Technology, Suratthani Rajabhat University, Suratthani 84100, Thailand
| | - Siriluck Sangkue
- Department of Physics, Faculty of Science and Technology, Suratthani Rajabhat University, Suratthani 84100, Thailand
| | - Wasinee Thiangsook
- Department of Radiology, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
- Molecular Imaging and Cyclotron Center, Division of Nuclear Medicine, Department of Radiology, Faculty of Medicine, Prince of Songkla University, Songkhla 90110, Thailand
| |
Collapse
|
7
|
Smoll NR, Brady Z, Scurrah KJ, Lee C, Berrington de González A, Mathews JD. Computed tomography scan radiation and brain cancer incidence. Neuro Oncol 2023; 25:1368-1376. [PMID: 36638155 PMCID: PMC10326490 DOI: 10.1093/neuonc/noad012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Computed tomography (CT) scans make substantial contributions to low-dose ionizing radiation exposures, raising concerns about excess cancers caused by diagnostic radiation. METHODS Deidentified medicare records for all Australians aged 0-19 years between 1985-2005 were linked to national death and cancer registrations to 2012. The National Cancer Institute CT program was used to estimate radiation doses to the brain from CT exposures in 1985-2005, Poisson regression was used to model the dependence of brain cancer incidence on brain radiation dose, which lagged by 2 years to minimize reverse causation bias. RESULTS Of 10 524 842 young Australians, 611 544 were CT-exposed before the age of 20 years, with a mean cumulative brain dose of 44 milligrays (mGy) at an average follow-up of 13.5 years after the 2-year lag period. 4472 were diagnosed with brain cancer, of whom only 237 had been CT-exposed. Brain cancer incidence increased with radiation dose to the brain, with an excess relative risk of 0.8 (95% CI 0.57-1.06) per 100 mGy. Approximately 6391 (95% CI 5255, 8155) persons would need to be exposed to cause 1 extra brain cancer. CONCLUSIONS For brain tumors that follow CT exposures in childhood by more than 2 years, we estimate that 40% (95% CI 29%-50%) are attributable to CT Radiation and not due to reverse causation. However, because of relatively low rates of CT exposure in Australia, only 3.7% (95% CI 2.3%-5.4%) of all brain cancers are attributable to CT scans. The population-attributable fraction will be greater in countries with higher rates of pediatric scanning.
Collapse
Affiliation(s)
- Nicolas R Smoll
- Melbourne School of Population and Global Health, University of Melbourne, 207 Bouverie Street Carlton, VIC, 3053, Australia
| | - Zoe Brady
- Melbourne School of Population and Global Health, University of Melbourne, 207 Bouverie Street Carlton, VIC, 3053, Australia
- Department of Radiology and Nuclear Medicine, Alfred Health, Melbourne, Victoria, Australia
| | - Katrina J Scurrah
- Melbourne School of Population and Global Health, University of Melbourne, 207 Bouverie Street Carlton, VIC, 3053, Australia
| | - Choonsik Lee
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Amy Berrington de González
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - John D Mathews
- Melbourne School of Population and Global Health, University of Melbourne, 207 Bouverie Street Carlton, VIC, 3053, Australia
| |
Collapse
|
8
|
Yang C, Wang W, Cui D, Zhang J, Liu L, Wang Y, Li W. Deep learning image reconstruction algorithms in low-dose radiation abdominal computed tomography: assessment of image quality and lesion diagnostic confidence. Quant Imaging Med Surg 2023; 13:3161-3173. [PMID: 37179954 PMCID: PMC10167467 DOI: 10.21037/qims-22-1227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 03/10/2023] [Indexed: 03/30/2023]
Abstract
Background The image quality of computed tomography (CT) can be adversely affected by a low radiation dose, and reconstruction algorithms of an appropriate level may be useful in reducing this impact. Methods Eight sets of CT images of a phantom were reconstructed with filtered back projection (FBP); adaptive statistical iterative reconstruction-Veo (ASiR-V) at 30% (AV-30), 50% (AV-50), 80% (AV-80), and 100% (AV-100); and deep learning image reconstruction (DLIR) at low (DL-L), medium (DL-M), and high (DL-H) levels. The noise power spectrum (NPS) and task transfer function (TTF) were measured. Thirty consecutive patients underwent low-dose radiation contrast-enhanced abdominal CT scans that were reconstructed using FBP, AV-30, AV-50, AV-80, and AV-100, and three levels of DLIR. The standard deviation (SD), signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) of the hepatic parenchyma and paraspinal muscle were evaluated. Two radiologists assessed the subjective image quality and lesion diagnostic confidence using a 5-point Likert scale. Results In the phantom study, both a higher DLIR and ASiR-V strength and a higher radiation dose led less noise. The NPS peak and average spatial frequency of the DLIR algorithms were closer to those of FBP, as the tube current increased and declined as the level of ASiR-V and DLIR strengthened. The NPS average spatial frequency of DL-L were higher than those of AISR-V. In clinical studies, AV-30 demonstrated a higher SD and lower SNR and CNR compared to DL-M and DL-H (P<0.05). For qualitative assessment, DL-M produced the highest qualitative image quality scores, with the exception of overall image noise (P<0.05). The NPS peak, average spatial frequency, and SD were the highest and the SNR, CNR, and subjective scores were the lowest with FBP. Conclusions Compared with FBP and ASiR-V, DLIR provided better image quality and noise texture both in the phantom and clinical studies, and DL-M maintained the best image quality and lesion diagnostic confidence in low-dose radiation abdominal CT.
Collapse
Affiliation(s)
- Chun Yang
- Department of Radiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
- Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Wenzhe Wang
- Department of Radiology, The Fourth People’ Hospital of Jinan, Jinan, China
| | - Dingye Cui
- Department of Radiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| | - Jinliang Zhang
- Department of Radiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
- Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Ling Liu
- CT Imaging Research Center, GE Healthcare, Shanghai, China
| | - Yuxin Wang
- Department of Radiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
- Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Wei Li
- Department of Radiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Jinan, China
| |
Collapse
|
9
|
Takano S, Shibamoto Y, Wang Z, Kondo T, Hashimoto S, Kawai T, Hiwatashi A. Optimal timing of a γH2AX analysis to predict cellular lethal damage in cultured tumor cell lines after exposure to diagnostic and therapeutic radiation doses. J Radiat Res 2023; 64:317-327. [PMID: 36634337 PMCID: PMC10036098 DOI: 10.1093/jrr/rrac096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Phosphorylated H2AX (γH2AX) is a sensitive biomarker of DNA double-strand breaks (DSBs). To assess the adverse effects of low-dose radiation (<50 mGy), γH2AX levels have typically been measured in human lymphocytes within 30 min of computed tomography (CT) examinations. However, in the presence of DSB repair, it remains unclear whether γH2AX levels within 30 min of irradiation completely reflect biological effects. Therefore, we investigated the optimal timing of a γH2AX analysis to predict the cell-surviving fraction (SF). Three tumor cell lines were irradiated at different X-ray doses (10-4000 mGy), and the relationships between SF and relative γH2AX levels were investigated 15 min and 2, 6, 12 and 24 h after irradiation. Data were analyzed for high-dose (0-4000 mGy) and low-dose (0-500 mGy) ranges. Correlations were observed between SF and the relative number of γH2AX foci/nucleus at 12 h only (R2 = 0.68, P = 0.001 after high doses; R2 = 0.37, P = 0.016 after low doses). The relative intensity of γH2AX correlated with SF 15 min to 12 h after high doses and 2 to 12 h after low doses, with the maximum R2 values being observed 2 h after high doses (R2 = 0.89, P < 0.001) and 12 h after low doses (R2 = 0.65, P < 0.001). Collectively, cellular lethal damage in tumor cells was more accurately estimated with residual DSBs 12 h after low-dose (10-500 mGy) irradiation. These results may contribute to determination of the optimal timing of biodosimetric analyses using γH2AX in future studies.
Collapse
Affiliation(s)
- Seiya Takano
- Corresponding author. Seiya Takano, MD, Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuhocho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan. Phone: (+81)52-853-8276; Fax: (+81)52-852-5244; E-mail:
| | - Yuta Shibamoto
- Narita Memorial Proton Center, 78 Shirakawa-cho, Toyohashi, Aichi, 441-8021, Japan
| | - Zhen Wang
- Gunma University Heavy Ion Medical Center, 3-39-22 Showa-machi, Maebashi, Gunma 371-8511, Japan
| | - Takuhito Kondo
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
- Department of Radiology, Nagoya Ekisaikai Hospital, 4-66 Syonen-cyo, Nakagawa-ku, Nagoya, Aichi 454-8502, Japan
| | - Shingo Hashimoto
- Department of Radiation Oncology, Aichi Cancer Center Hospital, 1-1 Kanokoden, Chikusaku, Nagoya, Aichi 464-8681, Japan
| | - Tatsuya Kawai
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| | - Akio Hiwatashi
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan
| |
Collapse
|
10
|
Testard I, Garcia-Chartier E, Issa A, Collin-Faure V, Aude-Garcia C, Candéias SM. Bystander signals from low- and high-dose irradiated human primary fibroblasts and keratinocytes modulate the inflammatory response of peripheral blood mononuclear cells. J Radiat Res 2023; 64:304-316. [PMID: 36680763 PMCID: PMC10036099 DOI: 10.1093/jrr/rrac094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 08/01/2022] [Indexed: 06/17/2023]
Abstract
Irradiated cells can propagate signals to neighboring cells. Manifestations of these so-called bystander effects (BEs) are thought to be relatively more important after exposure to low- vs high-dose radiation and can be mediated via the release of secreted molecules, including inflammatory cytokines, from irradiated cells. Thus, BEs can potentially modify the inflammatory environment of irradiated cells. To determine whether these modifications could affect the functionality of bystander immune cells and their inflammatory response, we analyzed and compared the in vitro response of primary human fibroblasts and keratinocytes to low and high doses of radiation and assessed their ability to modulate the inflammatory activation of peripheral blood mononuclear cells (PBMCs). Only high-dose exposure resulted in either up- or down-regulation of selected inflammatory genes. In conditioned culture media transfer experiments, radiation-induced bystander signals elicited from irradiated fibroblasts and keratinocytes were found to modulate the transcription of inflammatory mediator genes in resting PBMCs, and after activation of PBMCs stimulated with lipopolysaccharide (LPS), a strong inflammatory agent. Radiation-induced BEs induced from skin cells can therefore act as a modifier of the inflammatory response of bystander immune cells and affect their functionality.
Collapse
Affiliation(s)
- Isabelle Testard
- University Grenoble Alpes, CEA, CNRS, IRIG-LCBM-UMR5249, 38054, Grenoble, France
| | | | | | | | | | - Serge M Candéias
- Corresponding author. Laboratoire de Chimie et Biologie des Métaux, UMR 5259 CEA-CNRS-UGA, 17 avenue des martyrs, 38054 Grenoble Cedex 9, France. Tel: +33(0)4 38 78 92 49; Fax: +33(0)4 38 78 91 21.
| |
Collapse
|
11
|
Zhao D, Jiang X, Meng X, Liu D, Du Y, Zhao L, Jiang H. Low-Dose Radiation Reduces Doxorubicin-Induced Myocardial Injury Through Mitochondrial Pathways. Dose Response 2023; 21:15593258231155789. [PMID: 36798636 PMCID: PMC9926390 DOI: 10.1177/15593258231155789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 01/22/2023] [Indexed: 02/13/2023] Open
Abstract
The use of doxorubicin (DOX) as an anthraquinone antineoplastic agent is limited due to its cardiotoxicity. Our previous study suggested that low-dose radiation (LDR) could mitigate the cardiotoxicity induced by DOX via suppressing oxidative stress and cell apoptosis. However, the molecular targets and protective mechanism of LDR are not understood. In the present study, we sought to investigate the mechanisms underlying LDR's cardioprotection. Balb/c mice were randomly divided into four groups: Control group (no treatment), DOX group, LDR group (75 mGy), and LDR-72 h-DOX group (LDR pretreatment followed by intraperitoneal injection of DOX). Electron microscopy, PCR, and Western blot analyses indicated that LDR pretreatment mitigated changes in mitochondrial morphology caused by DOX, upregulated activity of mitochondrial complexes, and restored ATP levels in cardiomyocytes that were decreased by DOX. Whole genome microarray and PCR analyses showed that mitochondrial-related genes were altered by LDR pretreatment. Thus, our study showed that LDR can protect cardiomyocytes against DOX through improving mitochondrial function and increasing ATP production. This research could inform DOX chemotherapy strategies and provide new insight into the molecule mechanisms underlying the cardioprotective effects of LDR.
Collapse
Affiliation(s)
- Di Zhao
- Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, China
| | - Xin Jiang
- Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, China
| | - Xinxin Meng
- Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, China
| | - Dandan Liu
- Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, China
| | - Yanwei Du
- Changchun University of Chinese Medicine, Changchun, China
| | - Lijing Zhao
- The School of Basic Medicine, Jilin University, Changchun, China
| | - Hongyu Jiang
- Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, China,Hongyu Jiang, M.D., PhD. Department of Health Evaluation Center, First Hospital of Jilin University, Changchun, Jilin 130021, China.
| |
Collapse
|
12
|
Podlutskii M, Babina D, Podobed M, Bondarenko E, Bitarishvili S, Blinova Y, Shesterikova E, Prazyan A, Turchin L, Garbaruk D, Kudin M, Duarte GT, Volkova P. Arabidopsis thaliana Accessions from the Chernobyl Exclusion Zone Show Decreased Sensitivity to Additional Acute Irradiation. Plants (Basel) 2022; 11:3142. [PMID: 36432872 PMCID: PMC9697804 DOI: 10.3390/plants11223142] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 11/11/2022] [Accepted: 11/14/2022] [Indexed: 06/16/2023]
Abstract
Chronic ionising radiation exposure is a main consequence of radioactive pollution of the environment. The development of functional genomics approaches coupled with morphological and physiological studies allows new insights into plant adaptation to life under chronic irradiation. Using morphological, reproductive, physiological, and transcriptomic experiments, we evaluated the way in which Arabidopsis thaliana natural accessions from the Chernobyl exclusion zone recover from chronic low-dose and acute high-dose γ-irradiation of seeds. Plants from radioactively contaminated areas were characterized by lower germination efficiency, suppressed growth, decreased chlorophyll fluorescence, and phytohormonal changes. The transcriptomes of plants chronically exposed to low-dose radiation indicated the repression of mobile genetic elements and deregulation of genes related to abiotic stress tolerance. Furthermore, these chronically irradiated natural accessions showed higher tolerance to acute 150 Gy γ-irradiation of seeds, according to transcriptome and phytohormonal profiles. Overall, the lower sensitivity of the accessions from radioactively contaminated areas to acute high-dose irradiation may come at the cost of their growth performance under normal conditions.
Collapse
Affiliation(s)
| | - Darya Babina
- Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
| | - Marina Podobed
- Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
| | | | | | - Yana Blinova
- Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
| | | | - Alexander Prazyan
- Russian Institute of Radiology and Agroecology, 249032 Obninsk, Russia
| | - Larisa Turchin
- Polesye State Radiation-Ecological Reserve, 247618 Khoiniki, Belarus
| | - Dmitrii Garbaruk
- Polesye State Radiation-Ecological Reserve, 247618 Khoiniki, Belarus
| | - Maxim Kudin
- Polesye State Radiation-Ecological Reserve, 247618 Khoiniki, Belarus
| | - Gustavo T. Duarte
- Belgian Nuclear Research Centre (SCK CEN), Unit for Biosphere Impact Studies, 2400 Mol, Belgium
| | | |
Collapse
|
13
|
Klokov D, Applegate K, Badie C, Brede DA, Dekkers F, Karabulutoglu M, Le Y, Rutten EA, Lumniczky K, Gomolka M. International expert group collaboration for developing an adverse outcome pathway for radiation induced leukaemia. Int J Radiat Biol 2022; 98:1802-1815. [PMID: 36040845 DOI: 10.1080/09553002.2022.2117873] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE The concept of the adverse outcome pathway (AOP) has recently gained significant attention as to its potential for incorporation of mechanistic biological information into the assessment of adverse health outcomes following ionizing radiation (IR) exposure. This work is an account of the activities of an international expert group formed specifically to develop an AOP for IR-induced leukaemia. Group discussions were held during dedicated sessions at the international AOP workshop jointly organized by the MELODI (Multidisciplinary European Low Dose Initiative) and the ALLIANCE (European Radioecology Alliance) associations to consolidate knowledge into a number of biological key events causally linked by key event relationships and connecting a molecular initiating event with the adverse outcome. Further knowledge review to generate a weight of evidence support for the Key Event Relationships (KERs) was undertaken using a systematic review approach. CONCLUSIONS An AOP for IR-induced acute myeloid leukaemia was proposed and submitted for review to the OECD-curated AOP-wiki (aopwiki.org). The systematic review identified over 500 studies that link IR, as a stressor, to leukaemia, as an adverse outcome. Knowledge gap identification, although requiring a substantial effort via systematic review of literature, appears to be one of the major added values of the AOP concept. Further work, both within this leukaemia AOP working group and other similar working groups, is warranted and is anticipated to produce highly demanded products for the radiation protection research community.
Collapse
Affiliation(s)
- Dmitry Klokov
- Laboratory of Experimental Radiotoxicology and Radiobiology, Institute for Radiological Protection and Nuclear Safety, Fontenay-aux-Roses, France.,Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Canada
| | - Kimberly Applegate
- Department of Radiology, University of Kentucky College of Medicine (retired), Lexington, KY, USA
| | - Christophe Badie
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | - Dag Anders Brede
- Centre for Environmental Radioactivity (CERAD), Faculty of Environmental Sciences and Natural Resource Management (MINA), Norwegian University of Life Sciences (NMBU), Norway
| | - Fieke Dekkers
- Mathematical Institute, Utrecht University, Utrecht, The Netherlands.,Netherlands National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Melis Karabulutoglu
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | | | - Eric Andreas Rutten
- Cancer Mechanisms and Biomarkers group, Department of Radiation Effects, Radiation, Chemical and Environmental, UK Health Security Agency, Oxfordshire, United Kingdom
| | - Katalin Lumniczky
- Radiation Biology, Federal Office for Radiation Protection BfS, Oberschleißheim, Germany
| | - Maria Gomolka
- Unit of Radiation Medicine, Department of Radiobiology and Radiohygiene, National Public Health Centre, Budapest, Hungary
| |
Collapse
|
14
|
Lee SH, Jeong YJ, Park J, Kim HY, Son Y, Kim KS, Lee HJ. Low-Dose Radiation Affects Cardiovascular Disease Risk in Human Aortic Endothelial Cells by Altering Gene Expression under Normal and Diabetic Conditions. Int J Mol Sci 2022; 23:ijms23158577. [PMID: 35955709 PMCID: PMC9369411 DOI: 10.3390/ijms23158577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 02/05/2023] Open
Abstract
High doses of ionizing radiation can cause cardiovascular diseases (CVDs); however, the effects of <100 mGy radiation on CVD remain underreported. Endothelial cells (ECs) play major roles in cardiovascular health and disease, and their function is reduced by stimuli such as chronic disease, metabolic disorders, and smoking. However, whether exposure to low-dose radiation results in the disruption of similar molecular mechanisms in ECs under diabetic and non-diabetic states remains largely unknown; we aimed to address this gap in knowledge through the molecular and functional characterization of primary human aortic endothelial cells (HAECs) derived from patients with type 2 diabetes (T2D-HAECs) and normal HAECs in response to low-dose radiation. To address these limitations, we performed RNA sequencing on HAECs and T2D-HAECs following exposure to 100 mGy of ionizing radiation and examined the transcriptome changes associated with the low-dose radiation. Compared with that in the non-irradiation group, low-dose irradiation induced 243 differentially expressed genes (DEGs) (133 down-regulated and 110 up-regulated) in HAECs and 378 DEGs (195 down-regulated and 183 up-regulated) in T2D-HAECs. We also discovered a significant association between the DEGs and the interferon (IFN)-I signaling pathway, which is associated with CVD by Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis, protein−protein network analysis, and module analysis. Our findings demonstrate the potential impact of low-dose radiation on EC functions that are related to the risk of CVD.
Collapse
Affiliation(s)
- Soo-Ho Lee
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
| | - Ye Ji Jeong
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
| | - Jeongwoo Park
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
- New Drug Development Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea
| | - Hyun-Yong Kim
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
| | - Yeonghoon Son
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
| | - Kwang Seok Kim
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
- Correspondence: (K.S.K.); (H.-J.L.); Tel.: +82-2-970-1638 (H.-J.L.); Fax: +82-2-970-1985 (H.-J.L.)
| | - Hae-June Lee
- Divisions of Radiation Biomedical Research, Korea Institute of Radiological and Medical Sciences, Seoul 01812, Korea; (S.-H.L.); (Y.J.J.); (J.P.); (H.-Y.K.); (Y.S.)
- Correspondence: (K.S.K.); (H.-J.L.); Tel.: +82-2-970-1638 (H.-J.L.); Fax: +82-2-970-1985 (H.-J.L.)
| |
Collapse
|
15
|
Wang C, Hao C, Dai K, Li Y, Jiao J, Niu Z, Xu X, Deng X, He J, Yao W. Occupational Low-Dose Radiation Affects the Expression of Immune Checkpoint of Medical Radiologists. Int J Environ Res Public Health 2022; 19:ijerph19127105. [PMID: 35742351 PMCID: PMC9223099 DOI: 10.3390/ijerph19127105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/28/2022] [Accepted: 06/08/2022] [Indexed: 02/04/2023]
Abstract
The purpose of this study was to investigate the expression of immune checkpoint cytotoxic T-lymphocyte-associated protein 4 (CTLA-4) and T cell immunoglobulin and mucin domain 3 (TIM-3) in the peripheral blood T lymphocytes of medical radiologists. The study incorporated 100 male medical radiologists and 107 male healthy controls. The expressions of CTLA-4 and TIM-3 among CD4+ and CD8+ lymphocytes were detected by flow cytometry. The expression levels of CTLA-4 and TIM-3 in the CD4+T cells of radiation workers were lower than those of healthy controls (p < 0.05). Correlation analysis showed that the CD8+CTLA-4 expression level was significantly positively correlated with individual cumulative dose (rs = 0.260, p = 0.001, <0.05), while the expression level of CD8+TIM-3 was negatively correlated (rs = −0.180, p = 0.027, <0.05). Low-dose radiation exposure affects the expression of CTLA-4 and TIM-3 in human peripheral blood T lymphocytes. Future studies need to focus on exploring the mechanisms by which CTLA-4 and TIM-3 expression changes in response to low-dose radiation exposure.
Collapse
Affiliation(s)
- Chen Wang
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Changfu Hao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Kai Dai
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Yuzheng Li
- Henan Institute of Occupational Medicine, Zhengzhou 450001, China; (Y.L.); (J.J.)
| | - Jie Jiao
- Henan Institute of Occupational Medicine, Zhengzhou 450001, China; (Y.L.); (J.J.)
| | - Zhuoya Niu
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Xiao Xu
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Xuedan Deng
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Jing He
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
| | - Wu Yao
- Department of Occupational Health and Environmental Health, College of Public Health, Zhengzhou University, Zhengzhou 450001, China; (C.W.); (C.H.); (K.D.); (Z.N.); (X.X.); (X.D.); (J.H.)
- Correspondence:
| |
Collapse
|
16
|
Reiser E, Bazzano MV, Solano ME, Haybaeck J, Schatz C, Mangesius J, Ganswindt U, Toth B. Unlaid Eggs: Ovarian Damage after Low-Dose Radiation. Cells 2022; 11:1219. [PMID: 35406783 DOI: 10.3390/cells11071219] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/24/2022] [Accepted: 04/02/2022] [Indexed: 11/17/2022] Open
Abstract
The total body irradiation of lymphomas and co-irradiation in the treatment of adjacent solid tumors can lead to a reduced ovarian function, premature ovarian insufficiency, and menopause. A small number of studies has assessed the radiation-induced damage of primordial follicles in animal models and humans. Studies are emerging that evaluate radiation-induced damage to the surrounding ovarian tissue including stromal and immune cells. We reviewed basic laboratory work to assess the current state of knowledge and to establish an experimental setting for further studies in animals and humans. The experimental approaches were mostly performed using mouse models. Most studies relied on single doses as high as 1 Gy, which is considered to cause severe damage to the ovary. Changes in the ovarian reserve were related to the primordial follicle count, providing reproducible evidence that radiation with 1 Gy leads to a significant depletion. Radiation with 0.1 Gy mostly did not show an effect on the primordial follicles. Fewer data exist on the effects of radiation on the ovarian microenvironment including theca-interstitial, immune, endothelial, and smooth muscle cells. We concluded that a mouse model would provide the most reliable model to study the effects of low-dose radiation. Furthermore, both immunohistochemistry and fluorescence-activated cell sorting (FACS) analyses were valuable to analyze not only the germ cells but also the ovarian microenvironment.
Collapse
|
17
|
Lv J, Li J, Liu Y, Zhang H, Luo X, Ren M, Gao Y, Ma Y, Liang S, Yang Y, Song Z, Gao G, Gao G, Jiang Y, Li X. Artificial Intelligence-Aided Diagnosis Software to Identify Highly Suspicious Pulmonary Nodules. Front Oncol 2022; 11:749219. [PMID: 35242696 PMCID: PMC8886673 DOI: 10.3389/fonc.2021.749219] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 12/17/2021] [Indexed: 12/24/2022] Open
Abstract
Introduction To evaluate the value of artificial intelligence (AI)-assisted software in the diagnosis of lung nodules using a combination of low-dose computed tomography (LDCT) and high-resolution computed tomography (HRCT). Method A total of 113 patients with pulmonary nodules were screened using LDCT. For nodules with the largest diameters, an HRCT local-target scanning program (combined scanning scheme) and a conventional-dose CT scanning scheme were also performed. Lung nodules were subjectively assessed for image signs and compared by size and malignancy rate measured by AI-assisted software. The nodules were divided into improved visibility and identical visibility groups based on differences in the number of signs identified through the two schemes. Results The nodule volume and malignancy probability for subsolid nodules significantly differed between the improved and identical visibility groups. For the combined scanning protocol, we observed significant between-group differences in subsolid nodule malignancy rates. Conclusion Under the operation and decision of AI, the combined scanning scheme may be beneficial for screening high-risk populations.
Collapse
Affiliation(s)
- Jun Lv
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Jianhui Li
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Yanzhen Liu
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Hong Zhang
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | | | - Min Ren
- Tianjin Cardiovascular Institute, Tianjin Chest Hospital, Tianjin, China
| | - Yufan Gao
- Academy of Medical Engineering and Translational Medicine, Tianjin University, Tianjin, China
| | - Yanhe Ma
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Shuo Liang
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Yapeng Yang
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | - Zhenchun Song
- Medical Radiology Department, Tianjin Chest Hospital, Tianjin, China
| | | | - Guozheng Gao
- Pathology Department, Tianjin Chest Hospital, Tianjin, China
| | | | - Ximing Li
- Tianjin Cardiovascular Institute, Tianjin Chest Hospital, Tianjin, China
| |
Collapse
|
18
|
Wang XC, Tian LL, Fan CX, Duo CH, Xu KM. The Adaptive Responses in Non-Small Cell Lung Cancer A549 Cell Lines Induced by Low-Dose Ionizing Radiation and the Variations of miRNA Expression. Dose Response 2021; 19:15593258211039931. [PMID: 34658683 PMCID: PMC8516394 DOI: 10.1177/15593258211039931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/29/2021] [Indexed: 11/17/2022] Open
Abstract
Objective To study the effects of adaptive response in A549 cells induced by low-dose radiation and the miRNAs expression. Methods A549 cells were irradiated with 50 mGy and 200 mGy initial doses, respectively, and then irradiated with a challenge dose 20 Gy at 6 hours interval. The biological effects and miRNA expression were detected. Results The apoptosis rates of 50 mGy-20 Gy and 200 mGy-20 Gy groups were significantly lower than that of only 20 Gy irradiation group (P < .05). The percentage of G2/M phase cells of 50 mGy-20 Gy and 200 mGy-20 Gy groups was significantly decreased relative to the 20 Gy group (P < .05). One miRNA (mir-3662) was upregulated and 15 miRNAs (mir-185, mir-1908, mir-307, mir-182, mir-92a, mir-582, mi-r501, mir138-5p, mir-1260, mir-484, mir-378d, mir-193b, mir-127-3p, mir-1303, and mir-654-5p) were downregulated both in 50 mGy-20 Gy and 200 mGy-20 Gy groups than that of the 20 Gy group. Go and KEGG enrichment analysis showed that the target genes were significantly enriched in cell communication regulation, metabolic process, enzyme binding, and catalytic activity signaling pathways. Conclusion Low-dose X-ray of 50 mGy and 200 mGy radiation can induce adaptive apoptosis response prior to 20 Gy in A549 cells. Sixteen differently expressed miRNAs may play important roles in the adaptive effect of low-dose radiation.
Collapse
Affiliation(s)
- Xiao-Chun Wang
- ShiLong Hospital (Research Center for Pneumoconiosis Prevention and Treatment), National Center for Occupational Safety and Health, NHC, Beijing, China
| | - Li-Li Tian
- nstitute of Infectious and Endemic Disease Prevention, Beijing Centers for Disease Control and Prevention, Beijing, China
| | | | - Cai-Hong Duo
- ShiLong Hospital (Research Center for Pneumoconiosis Prevention and Treatment), National Center for Occupational Safety and Health, NHC, Beijing, China
| | - Ke-Ming Xu
- ShiLong Hospital (Research Center for Pneumoconiosis Prevention and Treatment), National Center for Occupational Safety and Health, NHC, Beijing, China
| |
Collapse
|
19
|
Tung FI, Chen LC, Wang YC, Chen MH, Shueng PW, Liu TY. Using a Hybrid Radioenhancer to Discover Tumor Cell-targeted Treatment for Osteosarcoma: An In Vitro Study. Curr Med Chem 2021; 28:3877-3889. [PMID: 33213306 DOI: 10.2174/0929867327666201118155216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 09/30/2020] [Accepted: 10/07/2020] [Indexed: 11/22/2022]
Abstract
Osteosarcoma is insensitive to radiation. High-dose radiation is often used as a treatment but causes side effects in patients. Hence, it is important to develop tumor cell-- targeted radiotherapy that could improve radiotherapy efficiency on tumor cells and reduce the toxic effect on normal cells during radiation treatment. In this study, we developed an innovative method for treating osteosarcoma by using a novel radiation-enhancer (i.e., carboxymethyl-hexanoyl chitosan-coated self-assembled Au@Fe3O4 nanoparticles; CSAF NPs). CSAF NPs were employed together with 5-aminolevulinic acid (5- ALA) to achieve tumor cell-targeted radiotherapy. In this study, osteosarcoma cells (MG63) and normal cells (MC3T3-E1) were used for an in vitro investigation, in which reactive oxygen species (ROS) assay, cell viability assay, clonogenic assay, and western blot were used to confirm the treatment efficiency. The ROS assay showed that the combination of CSAF NPs and 5-ALA enhanced radiation-induced ROS production in tumor cells (MG63); however, this was not observed in normal cells (MC3T3-E1). The cell viability ratio of normal cells to tumor cells after treatment with CSAF NPs and 5-ALA reached 2.79. Moreover, the clonogenic assay showed that the radiosensitivity of MG63 cells was increased by the combination use of CSAF NPs and 5-ALA. This was supported by performing a western blot that confirmed the expression of cytochrome c (a marker of cell mitochondria damage) and caspase-3 (a marker of cell apoptosis). The results provide an essential basis for developing tumor-cell targeted radiotherapy by means of low-- dose radiation.
Collapse
Affiliation(s)
- Fu-I Tung
- Department of Orthopaedic Surgery, Taipei City Hospital, Taipei, Taiwan, China
| | - Li-Chin Chen
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, China
| | - Yu-Chi Wang
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, China
| | - Ming-Hong Chen
- Department of Neurosurgery, Taipei Municipal Wanfang Hospital, Taipei, Taiwan, China
| | - Pei-Wei Shueng
- Division of Radiation Oncology, Far Eastern Memorial Hospital, New Taipei City, Taiwan, China
| | - Tse-Ying Liu
- Department of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan, China
| |
Collapse
|
20
|
Lindberg JCH. 'J'accuse.!': the continuous failure to address radiophobia and placing radiation in perspective. J Radiol Prot 2021; 41:459-469. [PMID: 34075897 DOI: 10.1088/1361-6498/abf9e2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 04/20/2021] [Indexed: 06/12/2023]
Abstract
As far as carcinogens are concerned, radiation is one of the best studied, having been researched for more than 100 years. Yet, radiation remains feared in many contexts as a result of its invisibility, its relationship with cancers and congenital disorders, aided by a variety of heuristics and reinforced by negative imagery. The strong socio-psychological response relating to nuclear energy has made radiation a classical case in the risk literature. This is reflected clearly following the nuclear accidents that have taken place, where the socio-psychological impacts of the clear dissonance between real and perceived health effects due to radiation exposure have caused considerable health detriment, outweighing the actual radiological impacts. Despite considerable efforts to normalise humankind's relationship with radiation, there has been little shift away from the perceived uniqueness of the health risks of radiation. One consistent issue is the failure to place radiation within its proper perspective and context, which has ensured that radiophobia has persisted. The radiation protection community must get better at placing its research within the appropriate perspective and context, something that is far too rarely the case in discussions on radiation matters outside of the scientific community. Each member of the radiation protection community has an ethical, professional and moral obligation to set the record straight, to challenge the misconceptions and factual errors that surround radiation, as well as putting it into the proper perspective and context. Failing to do so, the well-established harms of radiophobia will remain, and the many benefits of nuclear technology risk being withheld.
Collapse
Affiliation(s)
- John C H Lindberg
- Department of Geography, King's College London, London, United Kingdom
- Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| |
Collapse
|
21
|
Nemec-Bakk AS, Niccoli S, Davidson C, Roy D, Stoa L, Sreetharan S, Simard A, Boreham DR, Wilson JY, Tai T, Lees SJ, Khaper N. Lasting Effects of Low to Non-Lethal Radiation Exposure during Late Gestation on Offspring's Cardiac Metabolism and Oxidative Stress. Antioxidants (Basel) 2021; 10:antiox10050816. [PMID: 34065524 PMCID: PMC8160807 DOI: 10.3390/antiox10050816] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 05/12/2021] [Accepted: 05/15/2021] [Indexed: 01/24/2023] Open
Abstract
Ionizing radiation (IR) is known to cause fetal programming, but the physiological effects of low-dose IR are not fully understood. This study examined the effect of low (50 mGy) to non-lethal (300 and 1000 mGy) radiation exposure during late gestation on cardiac metabolism and oxidative stress in adult offspring. Pregnant C57BL/6J mice were exposed to 50, 300, or 1000 mGy of gamma radiation or Sham irradiation on gestational day 15. Sixteen weeks after birth, 18F-Fluorodeoxyglucose (FDG) uptake was examined in the offspring using Positron Emission Tomography imaging. Western blot was used to determine changes in oxidative stress, antioxidants, and insulin signaling related proteins. Male and female offspring from irradiated dams had lower body weights when compared to the Sham. 1000 mGy female offspring demonstrated a significant increase in 18F-FDG uptake, glycogen content, and oxidative stress. 300 and 1000 mGy female mice exhibited increased superoxide dismutase activity, decreased glutathione peroxidase activity, and decreased reduced/oxidized glutathione ratio. We conclude that non-lethal radiation during late gestation can alter glucose uptake and increase oxidative stress in female offspring. These data provide evidence that low doses of IR during the third trimester are not harmful but higher, non-lethal doses can alter cardiac metabolism later in life and sex may have a role in fetal programming.
Collapse
Affiliation(s)
- Ashley S. Nemec-Bakk
- Department of Science and Environmental Studies, Lakehead University, Thunder Bay, ON P7B 5E1, Canada;
| | - Sarah Niccoli
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
| | - Caitlund Davidson
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
| | - Danika Roy
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
| | - Lisa Stoa
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - Shayenthiran Sreetharan
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - Alain Simard
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
| | - Douglas R. Boreham
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
| | - Joanna Y. Wilson
- Department of Biology, McMaster University, Hamilton, ON L8S 4L8, Canada; (L.S.); (S.S.); (J.Y.W.)
| | - T.C. Tai
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
| | - Simon J. Lees
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
| | - Neelam Khaper
- Department of Biology, Lakehead University, Thunder Bay, ON P7B 5E1, Canada; (S.N.); (C.D.); (S.J.L.)
- Northern Ontario School of Medicine, Laurentian University, Sudbury, ON P3E 2C6, Canada; (D.R.); (A.S.); (D.R.B.); (T.C.T.)
- Northern Ontario School of Medicine, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
- Biomolecular Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada
- Correspondence:
| |
Collapse
|
22
|
Wang Q, Chen Y, Chang H, Hu T, Wang J, Xie Y, Cheng J. The Role and Mechanism of ATM-Mediated Autophagy in the Transition From Hyper-Radiosensitivity to Induced Radioresistance in Lung Cancer Under Low-Dose Radiation. Front Cell Dev Biol 2021; 9:650819. [PMID: 34055781 PMCID: PMC8149741 DOI: 10.3389/fcell.2021.650819] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 04/07/2021] [Indexed: 11/15/2022] Open
Abstract
Objective: This study aimed to investigate the effect of ataxia telangiectasia mutated (ATM)–mediated autophagy on the radiosensitivity of lung cancer cells under low-dose radiation and to further investigate the role of ATM and its specific mechanism in the transition from hyper-radiosensitivity (HRS) to induced radioresistance (IRR). Methods: The changes in the HRS/IRR phenomenon in A549 and H460 cells were verified by colony formation assay. Changes to ATM phosphorylation and cell autophagy in A549 and H460 cells under different low doses of radiation were examined by western blot, polymerase chain reaction (PCR), and electron microscopy. ATM expression was knocked down by short interfering RNA (siRNA) transfection, and ATM-regulated molecules related to autophagy pathways were screened by transcriptome sequencing analysis. The detection results were verified by PCR and western blot. The differential metabolites were screened by transcriptome sequencing and verified by colony formation assay and western blot. The nude mouse xenograft model was used to verify the results of the cell experiments. Results: (1) A549 cells with high expression of ATM showed positive HRS/IRR, whereas H460 cells with low expression of ATM showed negative HRS/IRR. After the expression of ATM decreased, the HRS phenomenon in A549 cells increased, and the radiosensitivity of H460 cells also increased. This phenomenon was associated with the increase in the autophagy-related molecules phosphorylated c-Jun N-terminal kinase (p-JNK) and autophagy/Beclin 1 regulator 1 (AMBRA1). (2) DL-Norvaline, a product of carbon metabolism in cells, inhibited autophagy in A549 cells under low-dose radiation. DL-Norvaline increased the expression levels of ATM, JNK, and AMBRA1 in A549 cells. (3) Mouse experiments confirmed the regulatory role of ATM in autophagy and metabolism and its function in HRS/IRR. Conclusion: ATM may influence autophagy through p-JNK and AMBRA1 to participate in the regulation of the HRS/IRR phenomenon. Autophagy interacts with the cellular carbon metabolite DL-Norvaline to participate in regulating the low-dose radiosensitivity of cells.
Collapse
Affiliation(s)
- Qiong Wang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yangyang Chen
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Haiyan Chang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Hu
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jue Wang
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuxiu Xie
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing Cheng
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
23
|
Ge C, Liang Y, Zhang Y, Su F, Chen L, Ma F, Ding K, Zhu J, Zheng X, Fu H. Plasma Proteins As Biodosimetric Markers of Low-Dose Radiation in Mice. Dose Response 2021; 19:15593258211016257. [PMID: 33994891 PMCID: PMC8113369 DOI: 10.1177/15593258211016257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/08/2021] [Accepted: 04/15/2021] [Indexed: 11/17/2022] Open
Abstract
Long-term exposures to low-dose radiation (LDR) may trigger several specific biological responses, including dysregulation of the immune and inflammatory systems. Here, we examined whether biodosimetry of LDR can be used to protect tissues from radiation or assess cancer risk. Mice were subjected to gamma-irradiation with repeated or single-dose LDR, and then the organ indices, peripheral hemogram, and blood biochemistry were analyzed. An antibody array was applied followed by enzyme-linked immunosorbent assay to evaluate the utility of multiple plasma proteins as biomarkers of repeated LDR in a murine model. LDR induced inapparent symptoms but slight variations in peripheral blood cell counts and alterations in blood biochemical indicator levels. Specific plasma proteins in the LDR groups were altered in response to a higher dose of irradiation at the same time points or a single-dose equivalent to the same total dose. Plasma levels of interleukin (IL)-5, IL-12p40, P-selectin, and serum amyloid A1 were associated with the LDR dose and thus may be useful as dosimetric predictors of LDR in mice. Estimating the levels of certain plasma proteins may yield promising biodosimetry parameters to accurately identify individuals exposed to LDR, facilitating risk assessment of long-term LDR exposure in individuals.
Collapse
Affiliation(s)
- Changhui Ge
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
| | - Yanjie Liang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Department of Radiation Oncology, the First Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Yaocang Zhang
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
| | - Fei Su
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Lu Chen
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Feiyue Ma
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,College of Chemistry & Environmental Science, Heibei University, Baoding, China
| | - Kexin Ding
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Jie Zhu
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Xiaofei Zheng
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,College of Chemistry & Environmental Science, Heibei University, Baoding, China
| | - Hanjiang Fu
- Department of Experimental Hematology and Biochemistry, Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Beijing, China.,Anhui Medical University, Hefei, China
| |
Collapse
|
24
|
Supawat B, Homnuan P, Kanthawong N, Semrasa N, Tima S, Kothan S, Udomtanakunchai C, Tungjai M. Different responses of normal cells (red blood cells) and cancer cells (K562 and K562/Dox cells) to low-dose 137Cs gamma-rays. Mol Clin Oncol 2021; 14:74. [PMID: 33680462 PMCID: PMC7922799 DOI: 10.3892/mco.2021.2236] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Accepted: 01/15/2021] [Indexed: 02/07/2023] Open
Abstract
High-dose radiation is deleterious to cells or tissues. However, the health risks of exposure to low-dose radiation remain unclear. The present study aimed to investigate the biological responses of low-dose gamma-ray in vitro exposure to normal red blood cells (RBCs) and erythroleukemia (K562 and K562/Dox) cancer cells. Cells were given a low dose of 0.03, 0.05 and 0.1 mGy of 137Cs gamma-rays (at a dose rate of 0.001 Gy/min) under in vitro conditions. Cells exposed to 0 Gy served as controls. Hemolysis and reactive oxygen species (ROS) were measured in exposed RBCs following exposure to low-dose gamma-rays. In addition, complete blood count (CBC) parameters were determined in irradiated whole blood. For irradiated K562 and K562/Dox cancer cells, ROS and mitochondrial activity were measured at 0, 30, 60 and 120 post-irradiation times. The results showed no change in the percentage of ROS and hemolysis in irradiated RBCs. The data indicated no perturbation in the CBC parameters in irradiated whole blood. By contrast, statistically significant dose-dependent increases in the percentage of ROS and decreases in the mitochondrial activity in the K562 and K562/Dox cancer cells were observed from 0 min up to 120 min post-irradiation. These findings concluded that there were differences in biological responses in normal cells (RBCs) and cancer cells (K562 and K562/Dox) to low-dose gamma-rays when cells were irradiated under in vitro conditions.
Collapse
Affiliation(s)
- Benjamaporn Supawat
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Radiation Research and Medical Imaging, Department of Radiologic Technology, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Panumas Homnuan
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Natthawan Kanthawong
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Niyada Semrasa
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Singkome Tima
- Division of Clinical Microscopy, Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Suchart Kothan
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Radiation Research and Medical Imaging, Department of Radiologic Technology, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chatchanok Udomtanakunchai
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Montree Tungjai
- Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Radiation Research and Medical Imaging, Department of Radiologic Technology, Chiang Mai University, Chiang Mai 50200, Thailand
- Correspondence to: Dr Montree Tungjai, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Building 2, 110 Intawaroros Road, Sripoom, Chiang Mai 50200, Thailand
| |
Collapse
|
25
|
Schirrmacher V. Less Can Be More: The Hormesis Theory of Stress Adaptation in the Global Biosphere and Its Implications. Biomedicines 2021; 9:293. [PMID: 33805626 DOI: 10.3390/biomedicines9030293] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 03/07/2021] [Accepted: 03/10/2021] [Indexed: 02/07/2023] Open
Abstract
A dose-response relationship to stressors, according to the hormesis theory, is characterized by low-dose stimulation and high-dose inhibition. It is non-linear with a low-dose optimum. Stress responses by cells lead to adapted vitality and fitness. Physical stress can be exerted through heat, radiation, or physical exercise. Chemical stressors include reactive species from oxygen (ROS), nitrogen (RNS), and carbon (RCS), carcinogens, elements, such as lithium (Li) and silicon (Si), and metals, such as silver (Ag), cadmium (Cd), and lead (Pb). Anthropogenic chemicals are agrochemicals (phytotoxins, herbicides), industrial chemicals, and pharmaceuticals. Biochemical stress can be exerted through toxins, medical drugs (e.g., cytostatics, psychopharmaceuticals, non-steroidal inhibitors of inflammation), and through fasting (dietary restriction). Key-lock interactions between enzymes and substrates, antigens and antibodies, antigen-presenting cells, and cognate T cells are the basics of biology, biochemistry, and immunology. Their rules do not obey linear dose-response relationships. The review provides examples of biologic stressors: oncolytic viruses (e.g., immuno-virotherapy of cancer) and hormones (e.g., melatonin, stress hormones). Molecular mechanisms of cellular stress adaptation involve the protein quality control system (PQS) and homeostasis of proteasome, endoplasmic reticulum, and mitochondria. Important components are transcription factors (e.g., Nrf2), micro-RNAs, heat shock proteins, ionic calcium, and enzymes (e.g., glutathion redox enzymes, DNA methyltransferases, and DNA repair enzymes). Cellular growth control, intercellular communication, and resistance to stress from microbial infections involve growth factors, cytokines, chemokines, interferons, and their respective receptors. The effects of hormesis during evolution are multifarious: cell protection and survival, evolutionary flexibility, and epigenetic memory. According to the hormesis theory, this is true for the entire biosphere, e.g., archaia, bacteria, fungi, plants, and the animal kingdoms.
Collapse
|
26
|
Wang X, Cao Q, Shi Y, Wu X, Mi Y, Liu K, Kan Q, Fan R, Liu Z, Zhang M. Identification of low-dose radiation-induced exosomal circ-METRN and miR-4709-3p/GRB14/PDGFRα pathway as a key regulatory mechanism in Glioblastoma progression and radioresistance: Functional validation and clinical theranostic significance. Int J Biol Sci 2021; 17:1061-1078. [PMID: 33867829 PMCID: PMC8040305 DOI: 10.7150/ijbs.57168] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/18/2021] [Indexed: 12/22/2022] Open
Abstract
Glioblastoma is a central nervous malignancy with a very poor prognosis. This study attempted to explore the role of exosomes induced by low-dose radiation-induced (ldrEXOs) and ldrEXOs-derived circ-METRN in glioblastoma progression and radioresistance at the molecular, cellular, animal, and clinical levels. Results in the present study revealed that low-dose radiation stimulated the secretion of ldrEXOs which delivered high levels of circ-METRN. And circ-METRN-abundant ldrEXOs increased the expression of γ-H2AX, indicating an efficient DNA damage-repair process in glioblastoma cells. The ldrEXOs-derived circ-METRN enhanced the glioblastoma progression and radioresistance via miR-4709-3p/GRB14/PDGFRα pathway. Up-regulating PDGFRα can rescue the tumor-promoting function of ldrEXOs in groups previously treated with inhibition of GRB14. Additionally, in-vivo experiments revealed that treatments with ldrEXOs promoted the growth of xenografted tumors and shortened the survival period. Furthermore, clinical researches indicated that circ-METRN may be transported into the bloodstream by exosomes in the early stages of fractionated radiotherapy. It has important clinical values to detect the serum exosomal circ-METRN in the early stage of radiotherapy, which is not only conducive to predict radioresistance and prognosis but also to assist MRI diagnosis in detecting the very early recurrence of glioblastoma. In summary, this study reveals for the first time that low-dose radiation-induced exosomal circ-METRN plays an oncogenic role in glioblastoma progression and radioresistance through miR-4709-3p/GRB14/PDGFRα pathway, providing mechanistic insights into the roles of circRNAs and a valuable marker for therapeutic targets in glioblastoma.
Collapse
Affiliation(s)
- Xinxin Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Qinchen Cao
- Department of Radiation Therapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Yonggang Shi
- Department of Radiation Therapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Xiaolong Wu
- Department of Medical Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Yin Mi
- Department of Radiation Therapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Ke Liu
- Department of Radiation Therapy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Quancheng Kan
- Department of Pharmacy and Internal Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Ruitai Fan
- Department of Radiation Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Zhangsuo Liu
- Department of Pharmacy and Internal Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - Mingzhi Zhang
- Department of Medical Oncology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, People's Republic of China
| |
Collapse
|
27
|
Kunze S, Cecil A, Prehn C, Möller G, Ohlmann A, Wildner G, Thurau S, Unger K, Rößler U, Hölter SM, Tapio S, Wagner F, Beyerlein A, Theis F, Zitzelsberger H, Kulka U, Adamski J, Graw J, Dalke C. Posterior subcapsular cataracts are a late effect after acute exposure to 0.5 Gy ionizing radiation in mice. Int J Radiat Biol 2021; 97:529-540. [PMID: 33464160 DOI: 10.1080/09553002.2021.1876951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE The long-term effect of low and moderate doses of ionizing radiation on the lens is still a matter of debate and needs to be evaluated in more detail. MATERIAL AND METHODS We conducted a detailed histological analysis of eyes from B6C3F1 mice cohorts after acute gamma irradiation (60Co source; 0.063 Gy/min) at young adult age of 10 weeks with doses of 0.063, 0.125, and 0.5 Gy. Sham irradiated (0 Gy) mice were used as controls. To test for genetic susceptibility heterozygous Ercc2 mutant mice were used and compared to wild-type mice of the same strain background. Mice of both sexes were included in all cohorts. Eyes were collected 4 h, 12, 18 and 24 months after irradiation. For a better understanding of the underlying mechanisms, metabolomics analyses were performed in lenses and plasma samples of the same mouse cohorts at 4 and 12 h as well as 12, 18 and 24 months after irradiation. For this purpose, a targeted analysis was chosen. RESULTS This analysis revealed histological changes particularly in the posterior part of the lens that rarely can be observed by using Scheimpflug imaging, as we reported previously. We detected a significant increase of posterior subcapsular cataracts (PSCs) 18 and 24 months after irradiation with 0.5 Gy (odds ratio 9.3; 95% confidence interval 2.1-41.3) independent of sex and genotype. Doses below 0.5 Gy (i.e. 0.063 and 0.125 Gy) did not significantly increase the frequency of PSCs at any time point. In lenses, we observed a clear effect of sex and aging but not of irradiation or genotype. While metabolomics analyses of plasma from the same mice showed only a sex effect. CONCLUSIONS This article demonstrates a significant radiation-induced increase in the incidence of PSCs, which could not be identified using Scheimpflug imaging as the only diagnostic tool.
Collapse
Affiliation(s)
- Sarah Kunze
- Institute of Developmental Genetics, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health, Neuherberg, Germany
| | - Alexander Cecil
- Research Unit Molecular Endocrinology and Metabolism, Genome Analysis Center, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | - Cornelia Prehn
- Research Unit Molecular Endocrinology and Metabolism, Genome Analysis Center, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | - Gabriele Möller
- Research Unit Molecular Endocrinology and Metabolism, Genome Analysis Center, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | - Andreas Ohlmann
- Department of Ophthalmology, University Hospital, Ludwig-Maximilians University, Munich, Germany
| | - Gerhild Wildner
- Department of Ophthalmology, University Hospital, Ludwig-Maximilians University, Munich, Germany
| | - Stephan Thurau
- Department of Ophthalmology, University Hospital, Ludwig-Maximilians University, Munich, Germany
| | - Kristian Unger
- Research Unit Radiation Cytogenetics, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | - Ute Rößler
- Department Radiation Protection and Health, Federal Office of Radiation Protection, Oberschleissheim, Germany
| | - Sabine M Hölter
- Institute of Developmental Genetics, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health, Neuherberg, Germany
| | - Soile Tapio
- Institute of Radiation Biology, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany.,School of Medicine, Technical University of Munich, Munich, Germany
| | - Florian Wagner
- Institute of Radiation Medicine, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | | | - Fabian Theis
- Institute of Computational Biology, Neuherberg, Germany
| | - Horst Zitzelsberger
- Research Unit Radiation Cytogenetics, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany
| | - Ulrike Kulka
- Department Radiation Protection and Health, Federal Office of Radiation Protection, Oberschleissheim, Germany
| | - Jerzy Adamski
- Research Unit Molecular Endocrinology and Metabolism, Genome Analysis Center, Helmholtz Center Munich German Research Center for Environmental Health, Neuherberg, Germany.,Lehrstuhl für Experimentelle Genetik, Technical University of Munich, Freising-Weihenstephan, Germany.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Jochen Graw
- Institute of Developmental Genetics, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health, Neuherberg, Germany
| | - Claudia Dalke
- Institute of Developmental Genetics, Helmholtz Zentrum München GmbH, German Research Center for Environmental Health, Neuherberg, Germany
| |
Collapse
|
28
|
Oakley PA, Harrison DE. Radiophobic Fear-Mongering, Misappropriation of Medical References and Dismissing Relevant Data Forms the False Stance for Advocating Against the Use of Routine and Repeat Radiography in Chiropractic and Manual Therapy. Dose Response 2021; 19:1559325820984626. [PMID: 33628151 PMCID: PMC7883173 DOI: 10.1177/1559325820984626] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 12/14/2022] Open
Abstract
There is a faction within the chiropractic profession passionately advocating against the routine use of X-rays in the diagnosis, treatment and management of patients with spinal disorders (aka subluxation). These activists reiterate common false statements such as "there is no evidence" for biomechanical spine assessment by X-ray, "there are no guidelines" supporting routine imaging, and also promulgate the reiterating narrative that "X-rays are dangerous." These arguments come in the form of recycled allopathic "red flag only" medical guidelines for spine care, opinion pieces and consensus statements. Herein, we review these common arguments and present compelling data refuting such claims. It quickly becomes evident that these statements are false. They are based on cherry-picked medical references and, most importantly, expansive evidence against this narrative continues to be ignored. Factually, there is considerable evidential support for routine use of radiological imaging in chiropractic and manual therapies for 3 main purposes: 1. To assess spinopelvic biomechanical parameters; 2. To screen for relative and absolute contraindications; 3. To reassess a patient's progress from some forms of spine altering treatments. Finally, and most importantly, we summarize why the long-held notion of carcinogenicity from X-rays is not a valid argument.
Collapse
|
29
|
Tanaka Y, Furuta M. Biological effects of low-dose γ-ray irradiation on chromosomes and DNA of Drosophila melanogaster. J Radiat Res 2021; 62:1-11. [PMID: 33290547 PMCID: PMC7779362 DOI: 10.1093/jrr/rraa108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/27/2020] [Indexed: 06/12/2023]
Abstract
While the damage to chromosomes and genes induced by high-dose radiation (HDR) has been well researched in many organisms, the effects of low-dose radiation (LDR), defined as a radiation dose of ≤100 mSv, are still being debated. Recent research has suggested that the biological effects of LDR differ from those observed in HDR. To detect the effect of LDR on genes, we selected a gene of Drosophila melanogaster, known as the multiple wing hair (mwh) gene. The hatched heterozygous larvae with genotype mwh/+ were irradiated by γ-rays of a 60Co source. After eclosion, the wing hairs of the heterozygous flies were observed. The area of only one or two mwh cells (small spot) and that of more than three mwh cells (large spot) were counted. The ratio of the two kinds of spots were compared between groups irradiated by different doses including a non-irradiated control group. For the small spot in females, the eruption frequency increased in the groups irradiated with 20-75 mGy, indicating hypersensitivity (HRS) to LDR, while in the groups irradiated with 200 and 300 mGy, the frequency decreased, indicating induced radioresistance (IRR), while in males, 50 and 100 mGy conferred HRS and 75 and 200 mGy conferred IRR. For the large spot in females, 75 mGy conferred HRS and 100-800 mGy conferred IRR. In conclusion, HRS and IRR to LDR was found in Drosophila wing cells by delimiting the dose of γ-rays finely, except in the male large spot.
Collapse
Affiliation(s)
- Yoshiharu Tanaka
- Corresponding author. Radiation Biology and Molecular Genetics, Division of Quantum Radiation, Faculty of Technology and Biology and Cultural Sciences, Faculty of Liberal Arts and Sciences, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan. Tel: 81-72-254-9750;
| | - Masakazu Furuta
- Radiation Biology and Molecular Genetics, Division of Quantum Radiation, Faculty of Technology and Department of Radiation Research Center, Osaka Prefecture University, 1-2 Gakuencho, Naka-ku, Sakai 591-8531, Japan
| |
Collapse
|
30
|
Oakley PA, Harrison DE. Are Continued Efforts to Reduce Radiation Exposures from X-Rays Warranted? Dose Response 2021; 19:1559325821995653. [PMID: 33746654 PMCID: PMC7903835 DOI: 10.1177/1559325821995653] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/23/2021] [Accepted: 01/23/2021] [Indexed: 12/12/2022] Open
Abstract
There are pressures to avoid use of radiological imaging throughout all healthcare due to the notion that all radiation is carcinogenic. This perception stems from the long-standing use of the linear no-threshold (LNT) assumption of risk associated with radiation exposures. This societal perception has led to relentless efforts to avoid and reduce radiation exposures to patients at great costs. Many radiation reduction campaigns have been launched to dissuade doctors from using radiation imaging. Lower-dose imaging techniques and practices are being advocated. Alternate imaging procedures are encouraged. Are these efforts warranted? Based on recent evidence, LNT ideology is shown to be defunct for risk assessment at low-dose exposure ranges which includes X-rays and CT scans. In fact, the best evidence that was once used to support LNT ideology, including the Life Span Study data, now indicates thresholds for cancer induction are high; therefore, low-dose X-rays cannot cause harm. Current practices are safe as exposures currently encountered are orders of magnitude below threshold levels shown to be harmful. As long as imaging is medically warranted, it is shown that efforts to reduce exposures that are within background radiation levels and that are also shown to enhance health by upregulating natural adaptive protection systems are definitively wasted resources.
Collapse
|
31
|
Rozhko TV, Nemtseva EV, Gardt MV, Raikov AV, Lisitsa AE, Badun GA, Kudryasheva NS. Enzymatic Responses to Low-Intensity Radiation of Tritium. Int J Mol Sci 2020; 21:E8464. [PMID: 33187108 PMCID: PMC7696592 DOI: 10.3390/ijms21228464] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 12/12/2022] Open
Abstract
The present study considers a possible role of enzymatic reactions in the adaptive response of cells to the beta-emitting radionuclide tritium under conditions of low-dose exposures. Effects of tritiated water (HTO) on the reactions of bacterial luciferase and NAD(P)H:FMN-oxidoreductase, as well as a coupled system of these two reactions, were studied at radioactivity concentrations ≤ 200 MBq/L. Additionally, one of the simplest enzymatic reactions, photobiochemical proton transfer in Coelenteramide-containing Fluorescent Protein (CLM-FP), was also investigated. We found that HTO increased the activity of NAD(P)H:FMN-oxidoreductase at the initial stage of its reaction (by up to 230%); however, a rise of luciferase activity was moderate (<20%). The CLM-FP samples did not show any increase in the rate of the photobiochemical proton transfer under the exposure to HTO. The responses of the enzyme systems were compared to the 'hormetic' response of luminous marine bacterial cells studied earlier. We conclude that (1) the oxidoreductase reaction contributes significantly to the activation of the coupled enzyme system and bacterial cells by tritium, and (2) an increase in the organization level of biological systems promotes the hormesis phenomenon.
Collapse
Affiliation(s)
- Tatiana V. Rozhko
- Department of Medical and Biological Physics, Krasnoyarsk State Medical Academy, 660022 Krasnoyarsk, Russia
| | - Elena V. Nemtseva
- Biophysics Department, Siberian Federal University, 660041 Krasnoyarsk, Russia; (E.V.N.); (M.V.G.); (A.V.R.); (A.E.L.); (N.S.K.)
- Institute of Biophysics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
| | - Maria V. Gardt
- Biophysics Department, Siberian Federal University, 660041 Krasnoyarsk, Russia; (E.V.N.); (M.V.G.); (A.V.R.); (A.E.L.); (N.S.K.)
| | - Alexander V. Raikov
- Biophysics Department, Siberian Federal University, 660041 Krasnoyarsk, Russia; (E.V.N.); (M.V.G.); (A.V.R.); (A.E.L.); (N.S.K.)
| | - Albert E. Lisitsa
- Biophysics Department, Siberian Federal University, 660041 Krasnoyarsk, Russia; (E.V.N.); (M.V.G.); (A.V.R.); (A.E.L.); (N.S.K.)
| | - Gennadii A. Badun
- Department of Chemistry, Moscow State University, 119991 Moscow, Russia;
| | - Nadezhda S. Kudryasheva
- Biophysics Department, Siberian Federal University, 660041 Krasnoyarsk, Russia; (E.V.N.); (M.V.G.); (A.V.R.); (A.E.L.); (N.S.K.)
- Institute of Biophysics SB RAS, FRC KSC SB RAS, 660036 Krasnoyarsk, Russia
| |
Collapse
|
32
|
Shin E, Lee S, Kang H, Kim J, Kim K, Youn H, Jin YW, Seo S, Youn B. Organ-Specific Effects of Low Dose Radiation Exposure: A Comprehensive Review. Front Genet 2020; 11:566244. [PMID: 33133150 PMCID: PMC7565684 DOI: 10.3389/fgene.2020.566244] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 09/07/2020] [Indexed: 12/16/2022] Open
Abstract
Ionizing radiation (IR) is a high-energy radiation whose biological effects depend on the irradiation doses. Low-dose radiation (LDR) is delivered during medical diagnoses or by an exposure to radioactive elements and has been linked to the occurrence of chronic diseases, such as leukemia and cardiovascular diseases. Though epidemiological research is indispensable for predicting and dealing with LDR-induced abnormalities in individuals exposed to LDR, little is known about epidemiological markers of LDR exposure. Moreover, difference in the LDR-induced molecular events in each organ has been an obstacle to a thorough investigation of the LDR effects and a validation of the experimental results in in vivo models. In this review, we summarized the recent reports on LDR-induced risk of organ-specifically arranged the alterations for a comprehensive understanding of the biological effects of LDR. We suggested that LDR basically caused the accumulation of DNA damages, controlled systemic immune systems, induced oxidative damages on peripheral organs, and even benefited the viability in some organs. Furthermore, we concluded that understanding of organ-specific responses and the biological markers involved in the responses is needed to investigate the precise biological effects of LDR.
Collapse
Affiliation(s)
- Eunguk Shin
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Sungmin Lee
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Hyunkoo Kang
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Jeongha Kim
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - Kyeongmin Kim
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea
| | - HyeSook Youn
- Department of Integrative Bioscience and Biotechnology, Sejong University, Seoul, South Korea
| | - Young Woo Jin
- Laboratory of Low Dose Risk Assessment, National Radiation Emergency Medical Center, Korea Institute of Radiological & Medical Sciences, Seoul, South Korea
| | - Songwon Seo
- Laboratory of Low Dose Risk Assessment, National Radiation Emergency Medical Center, Korea Institute of Radiological & Medical Sciences, Seoul, South Korea
| | - BuHyun Youn
- Department of Integrated Biological Science, Pusan National University, Busan, South Korea.,Department of Biological Sciences, Pusan National University, Busan, South Korea
| |
Collapse
|
33
|
Waltar A, Feinendegen L. The Double Threshold: Consequences for Identifying Low-Dose Radiation Effects. Dose Response 2020; 18:1559325820949729. [PMID: 32913426 PMCID: PMC7444125 DOI: 10.1177/1559325820949729] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 01/21/2023] Open
Abstract
Prior to observing low-dose-induced cell signaling and adaptive protection, radiogenic stochastic effects were assumed to be linearly related to absorbed dose. Now, abundant data prove the occurrence of radiogenic adaptive protection specifically at doses below ∼ 200 mGy (with some data suggesting such protection at a dose even higher than 200 mGy). Moreover, cells do not thrive properly when deprived of radiation below background dose. Two threshold doses need be considered in constructing a valid dose-response relationship. With doses beginning to rise from zero, cells increasingly escape radiation deprivation. The dose at which radiation-deprived cells begin to function homeostatically provides dose Threshold A. With further dose increase, adaptive protection becomes prominent and then largely disappears at acute doses above ∼ 200 mGy. The dose at which damage begins to override protection defines Threshold B. Thresholds A and B should be terms in modeling dose-response functions. Regarding whole-body responses, current data suggest for low-LET acute, non-chronic, irradiation a Threshold B of about 100 mGy prevails, except for leukemia and probably some other malignancies, and for chronic, low dose-rate irradiation where the Threshold B may well reach 1 Gy per year. A new Research and Development Program should determine individual Thresholds A and B for various radiogenic cell responses depending on radiation quality and target.
Collapse
Affiliation(s)
- Alan Waltar
- Retired Professor and Head, Department of Nuclear Engineering, Texas A&M University, College Station, TX
| | | |
Collapse
|
34
|
Oakley PA, Harrison DE. X-Ray Hesitancy: Patients' Radiophobic Concerns Over Medical X-rays. Dose Response 2020; 18:1559325820959542. [PMID: 32994755 PMCID: PMC7503016 DOI: 10.1177/1559325820959542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 08/20/2020] [Accepted: 08/25/2020] [Indexed: 12/14/2022] Open
Abstract
All too often the family physician, orthopedic surgeon, dentist or chiropractor is met with radiophobic concerns about X-ray imaging in the clinical setting. These concerns, however, are unwarranted fears based on common but ill-informed and perpetuated ideology versus current understanding of the effects of low-dose radiation exposures. Themes of X-ray hesitancy come in 3 forms: 1. All radiation exposures are harmful (i.e. carcinogenic); 2. Radiation exposures are cumulative; 3. Children are more susceptible to radiation. Herein we address these concerns and find that low-dose radiation activates the body's adaptive responses and leads to reduced cancers. Low-dose radiation is not cumulative as long as enough time (e.g. 24 hrs) passes prior to a repeated exposure, and any damage is repaired, removed, or eliminated. Children have more active immune systems; the literature shows children are no more affected than adults by radiation exposures. Medical X-rays present a small, insignificant addition to background radiation exposure that is not likely to cause harm. Doctors and patients alike should be better informed of the lack of risks from diagnostic radiation and the decision to image should rely on the best evidence, unique needs of the patient, and the expertise of the physician-not radiophobia.
Collapse
|
35
|
Hanekamp YN, Giordano J, Hanekamp JC, Khan MK, Limper M, Venema CS, Vergunst SD, Verhoeff JJC, Calabrese EJ. Immunomodulation Through Low-Dose Radiation for Severe COVID-19: Lessons From the Past and New Developments. Dose Response 2020; 18:1559325820956800. [PMID: 33013251 PMCID: PMC7513398 DOI: 10.1177/1559325820956800] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Low-dose radiation therapy (LD-RT) has historically been a successful treatment for pneumonia and is clinically established as an immunomodulating therapy for inflammatory diseases. The ongoing COVID-19 pandemic has elicited renewed scientific interest in LD-RT and multiple small clinical trials have recently corroborated the historical LD-RT findings and demonstrated preliminary efficacy and immunomodulation for the treatment of severe COVID-19 pneumonia. The present review explicates archival medical research data of LD-RT and attempts to translate this into modernized evidence, relevant for the COVID-19 crisis. Additionally, we explore the putative mechanisms of LD-RT immunomodulation, revealing specific downregulation of proinflammatory cytokines that are integral to the development of the COVID-19 cytokine storm induced hyperinflammatory state. Radiation exposure in LD-RT is minimal compared to radiotherapy dosing standards in oncology care and direct toxicity and long-term risk for secondary disease are expected to be low. The recent clinical trials investigating LD-RT for COVID-19 confirm initial treatment safety. Based on our findings we conclude that LD-RT could be an important treatment option for COVID-19 patients that are likely to progress to severity. We advocate the further use of LD-RT in carefully monitored experimental environments to validate its effectiveness, risks and mechanisms of LD-RT.
Collapse
Affiliation(s)
- Yannic N. Hanekamp
- University Medical Centre Groningen, University of Groningen, the
Netherlands
| | - James Giordano
- Departments of Neurology and Biochemistry, and Pellegrino Center for
Clinical Bioethics, Georgetown University Medical Center, Washington, DC, USA
| | - Jaap C. Hanekamp
- University College Roosevelt, Middelburg, the Netherlands
- Department of Environmental Health Sciences, University of
Massachusetts, Amherst, MA, USA
| | - Mohammad K. Khan
- Department of Radiation Oncology, Winship Cancer Institute, Emory
University School of Medicine, Atlanta, GA, USA
| | - Maarten Limper
- Department of Rheumatology and Clinical Immunology, University
Medical Center Utrecht, Utrecht University, Utrecht, the Netherlands
| | | | - Samuel D. Vergunst
- University Medical Centre Groningen, University of Groningen, the
Netherlands
| | - Joost J. C. Verhoeff
- Department of Radiation Oncology, University Medical Center Utrecht,
Utrecht University, Utrecht, the Netherlands
| | - Edward J. Calabrese
- Department of Environmental Health Sciences, University of
Massachusetts, Amherst, MA, USA
| |
Collapse
|
36
|
El Tawiil GA, Noaman EA, Askar MA, El Fatih NM, Mohamed HE. Anticancer and Apoptogenic Effect of Graviola and Low-Dose Radiation in Tumor Xenograft in Mice. Integr Cancer Ther 2020; 19:1534735419900930. [PMID: 32493124 PMCID: PMC7273578 DOI: 10.1177/1534735419900930] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background: Annona muricata (graviola) has been claimed for its potential against various diseases including cancer. Objective: The present study aimed to investigate the anticancer effect of graviola extract on Ehrlich solid tumor (EST) mice along with or without a low dose of γ radiation (LDR). Methods: Mice were treated with graviola 50 mg/kg body weight orally for 30 days after EST induction and exposed to γ-ray (2 Gy/week for 3 weeks). Cell cycle, CD44, TGF-β, Bcl-2, and annexin V were determined in tumor tissue. Results: The result obtained showed a significant decrease (P < .05) of tumor size in 28 graviola-treated EST-bearing mice group (EG) or graviola-treated and irradiated EST-30-bearing mice (EGR) groups versus the EST group. The large number of cells in the sub-G0/G1 population and low cell number at S and M phases signify tumor cell apoptosis and inhibition of cell division in EG or EGR groups. Additionally, significant increases in the expression of CD44 and TGF-β were recorded in EST mice as compared with EG or EGR mice. Furthermore, EST mice exhibited a decrease in the apoptotic marker annexin v and increase in antiapoptotic Bcl-2 compared with EG and EGR mice. Conclusion: It could be suggested that graviola exerts its antitumor effect throughout the regulation of the tumor cell cycle as well as inducing apoptotic signals. The combined treatment of graviola and LDR augments their effect on tumor proliferation.
Collapse
|
37
|
Liu X, Liu Z, Wang D, Han Y, Hu S, Xie Y, Liu Y, Zhu M, Guan H, Gu Y, Zhou PK. Effects of low dose radiation on immune cells subsets and cytokines in mice. Toxicol Res (Camb) 2020; 9:249-262. [PMID: 32670556 DOI: 10.1093/toxres/tfaa017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 03/07/2020] [Accepted: 03/30/2020] [Indexed: 12/23/2022] Open
Abstract
Whole-body exposure to low-dose radiation due to diagnostic imaging procedures, occupational hazards and radiation accidents is a source of concern. In this study, we analyzed the effects of single and long-term low-dose irradiation on the immune system. Male Balb/c mice received a single whole-body dose of irradiation (0.01, 0.05, 0.2, 0.5 or 1 Gy). For long-term irradiation, mice were irradiated 10 times (total dose of 0.2, 0.5 or 1 Gy) over a period of 6 weeks. Two days after single or long-term irradiation, the numbers of splenic macrophages, natural killer cells and dendritic cells were reduced, and the spleen organ coefficient was decreased. At 2 Days after long-term low-dose irradiation, the number of white blood cells in the peripheral blood of the mice decreased. Between 7 and 14 Days after long-term low-dose irradiation, the number of immune cells in the thymus and spleen began to increase and then stabilized. Th1/Th2 cytokines and reactive oxygen species-related proteins first decreased and then increased to a plateau. Our results show a significant difference in the effects of single and long-term low-dose irradiation on the immune system.
Collapse
Affiliation(s)
- Xiaochang Liu
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Zheng Liu
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Duo Wang
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Yang Han
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Sai Hu
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Ying Xie
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Yuelu District, Changsha 410013, P. R. China
| | - Yike Liu
- Institute for Chemical Carcinogenesis, State Key Laboratory of Respiratory Disease, Guangzhou Medical University, 195 Dongfeng W Rd, Yuexiu District, Guangzhou 511436, P. R. China
| | - Maoxiang Zhu
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Hua Guan
- Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Yongqing Gu
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| | - Ping-Kun Zhou
- School of Public Health, University of South China, Zhengxiang District, Hengyang, Hunan Province 421001, P. R. China.,Beijing Key Laboratory for Radiobiology, Beijing Institute of Radiation Medicine, Haidian District, Beijing 100850, P. R. China
| |
Collapse
|
38
|
O'Brien SA, James DJ, Warren-Forward HM. Health and Lifestyle Factors of Australian Medical Radiation Workers: A Pilot Study Using Nuclear Medicine Technologists. J Nucl Med Technol 2020; 48:246-253. [PMID: 32312849 DOI: 10.2967/jnmt.119.241505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Accepted: 03/16/2020] [Indexed: 11/16/2022] Open
Abstract
The health effects of chronic low-dose radiation exposure are a subject of worldwide debate. These effects are difficult to assess because all low-dose exposure mechanisms must be accounted for, including background exposure, personal medical examinations, and environmental exposure such as aviation, as well as lifestyle choices contributing to disease. The current literature recommends investigation of lifestyle factors to fill in these gaps. The aim of this study was to pilot-test a survey developed to assess health and lifestyle factors for Australian medical radiation workers. Methods: A cohort of nuclear medicine technologists (NMTs) was selected to test the survey. The survey consisted of 53 questions relating to demographics, employment, lifestyle, and health. Data from the 2017-2018 Australian National Health Survey were used to compare the lifestyle choices and health of the participants with those of the Australian general population. Results: In total, 101 participants pilot-tested the survey. Overall, Australian NMTs make better lifestyle choices (more exercise, more vegetable intake, lower rates of smoking and alcohol consumption) resulting in lower rates of obesity than the Australian general population. NMTs had a higher reported health status than the Australian population, with lower levels of psychologic distress. Given the low age of NMTs participating in the study, the cancer incidence rate may be higher than that reported for the Australian general population; however, a larger sample size is required to provide more definitive results. Conclusion: This pilot study demonstrated the feasibility of conducting a widespread survey to assess health and lifestyle factors for the Australian medical radiation worker cohort. Comparison of survey results with data for the entire Australian population have highlighted the potential to increase the number of lifestyle questions.
Collapse
Affiliation(s)
- Samantha A O'Brien
- School of Health Sciences, University of Newcastle, Newcastle, New South Wales, Australia
| | - Daphne J James
- School of Health Sciences, University of Newcastle, Newcastle, New South Wales, Australia
| | - Helen M Warren-Forward
- School of Health Sciences, University of Newcastle, Newcastle, New South Wales, Australia
| |
Collapse
|
39
|
Oakley PA, Harrison DE. Death of the ALARA Radiation Protection Principle as Used in the Medical Sector. Dose Response 2020; 18:1559325820921641. [PMID: 32425724 PMCID: PMC7218317 DOI: 10.1177/1559325820921641] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 12/17/2022] Open
Abstract
ALARA is the acronym for "As Low As Reasonably Achievable." It is a radiation protection concept borne from the linear no-threshold (LNT) hypothesis. There are no valid data today supporting the use of LNT in the low-dose range, so dose as a surrogate for risk in radiological imaging is not appropriate, and therefore, the use of the ALARA concept is obsolete. Continued use of an outdated and erroneous principle unnecessarily constrains medical professionals attempting to deliver high-quality care to patients by leading to a reluctance by doctors to order images, a resistance from patients/parents to receive images, subquality images, repeated imaging, increased radiation exposures, the stifling of low-dose radiation research and treatment, and the propagation of radiophobia and continued endorsement of ALARA by regulatory bodies. All these factors result from the fear of radiogenic cancer, many years in the future, that will not occur. It has been established that the dose threshold for leukemia is higher than previously thought. A low-dose radiation exposure from medical imaging will likely upregulate the body's adaptive protection systems leading to the prevention of future cancers. The ALARA principle, as used as a radiation protection principle throughout medicine, is scientifically defunct and should be abandoned.
Collapse
|
40
|
Shibata S, Shibamoto Y, Maehara M, Hobo A, Hotta N, Ozawa Y. Reasons for Undergoing CT During Childhood: Can CT-Exposed and CT-Naive Populations Be Compared? Dose Response 2020; 18:1559325820907011. [PMID: 32110172 PMCID: PMC7026821 DOI: 10.1177/1559325820907011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/22/2019] [Accepted: 01/16/2020] [Indexed: 12/20/2022] Open
Abstract
Several epidemiological studies suggested an increased risk of cancer and other tumors in individuals undergoing computed tomography (CT) examination during childhood; however, it was questioned whether the group undergoing CT was comparable to that not undergoing CT. To address this issue, we investigated the reasons for undergoing CT in 763 children aged 0 to 19 years in 2013. Their medical records were fully evaluated and symptoms, underlying conditions, reasons for CT, and clinical courses after CT were investigated. Among the 763 children, 66.1% underwent repeat CT after the first examination, and 19.3% underwent CT 8 times or more. Among all the examined children, 8.8% had cancer and 4.7% had cancer-prone conditions such as Down syndrome, tuberous sclerosis, and cirrhosis. Only 11.4% of the 763 children underwent CT because of trauma, and 32.2% of the children had some types of congenital anomaly. The rate of trauma decreased with an increase in the frequency of CT examinations. Since the incidence of congenital anomalies is below 2.5% in the general population, it was concluded that the population of children undergoing CT is completely different from that not undergoing CT. The 2 groups should not be compared.
Collapse
Affiliation(s)
- Shunsuke Shibata
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Yuta Shibamoto
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Megumi Maehara
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Ayano Hobo
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Naohide Hotta
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Yoshiyuki Ozawa
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| |
Collapse
|
41
|
Schröder A, Kriesen S, Hildebrandt G, Manda K. First Insights into the Effect of Low-Dose X-Ray Irradiation in Adipose-Derived Stem Cells. Int J Mol Sci 2019; 20:ijms20236075. [PMID: 31810198 PMCID: PMC6928975 DOI: 10.3390/ijms20236075] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/26/2019] [Accepted: 11/28/2019] [Indexed: 02/07/2023] Open
Abstract
(1) Background: Emerging interest of physicians to use adipose-derived stem cells (ADSCs) for regenerative therapies and the fact that low-dose irradiation (LD-IR ≤ 0.1 Gy) has been reported to enhance the proliferation of several human normal and bone-marrow stem cells, but not that of tumor cells, lead to the idea of improving stem cell therapies via low-dose radiation. Therefore, the aim of this study was to investigate unwanted side effects, as well as proliferation-stimulating mechanisms of LD-IR on ADSCs. (2) Methods: To avoid donor specific effects, ADSCs isolated from mamma reductions of 10 donors were pooled and used for the radiobiological analysis. The clonogenic survival assay was used to classify the long-term effects of low-dose radiation in ADSCs. Afterwards, cytotoxicity and genotoxicity, as well as the effect of irradiation on proliferation of ADSCs were investigated. (3) Results: LD (≤ 0.1 Gy) of ionizing radiation promoted the proliferation and survival of ADSCs. Within this dose range neither geno- nor cytotoxic effects were detectable. In contrast, greater doses within the dose range of >0.1–2.0 Gy induced residual double-strand breaks and reduced the long-term survival, as well as the proliferation rate of ADSCs. (4) Conclusions: Our data suggest that ADSCs are resistant to LD-IR. Furthermore, LD-IR could be a possible mediator to improve approaches of stem cells in the field of regenerative medicine.
Collapse
|
42
|
Aneva N, Zaharieva E, Katsarska O, Savova G, Stankova K, Djounova J, Boteva R. Inflammatory profile dysregulation in nuclear workers occupationally exposed to low-dose gamma radiation. J Radiat Res 2019; 60:768-779. [PMID: 31665386 PMCID: PMC7268544 DOI: 10.1093/jrr/rrz059] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/10/2019] [Accepted: 08/02/2019] [Indexed: 06/10/2023]
Abstract
Chronic inflammation is a common denominator linking a wide range of health conditions, including tissue response to radiation exposure. This pilot study investigates whether inflammatory cytokines-interleukins IL-6, -8, -10, monocyte chemoattractant protein-1 (MCP-1) and tumor necrosis factor α (TNFα)-can be used as early biomarkers of radiation-induced adverse health effects in occupationally exposed individuals. The study included 33 workers externally exposed to gamma radiation from the nuclear industry with cumulated doses from 0.11 to 190 mSv and 42 non-exposed controls of comparable age and socio-economic status. IL-6, IL-8, MCP-1, TNFα and IL-10 were analyzed by enzyme-linked assay (ELISA) in blood plasma samples. Total antioxidant status (TAS) of blood plasma was determined by a colorimetric assay. The radiation-exposed and control groups measured significantly different levels of MCP-1, TNFα and IL-10. Seventy-five percent of radiation workers had either high MCP-1 levels or low IL-10 levels and 30% had all three cytokines dysregulated. Approximately 50% of workers showed upregulated antioxidant status, which appeared to compensate the pro-inflammatory cytokine shift in these individuals. In contrast, only 2% of the control subjects were found to have three dysregulated cytokines, and all of them measured within the normal TAS range. The present study may represent an important step towards the establishment of a reliable set of biomarkers for health-risk estimation in population cohorts exposed to low radiation doses.
Collapse
Affiliation(s)
- Nevena Aneva
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Elena Zaharieva
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Olya Katsarska
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Gergana Savova
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Katia Stankova
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Jana Djounova
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| | - Rayna Boteva
- National Center of Radiobiology and Radiation Protection (NCRRP), 1606 Sofia, Bulgaria
| |
Collapse
|
43
|
Hanu C, Loeliger BW, Panyutin IV, Maass-Moreno R, Wakim P, Pritchard WF, Neumann RD, Panyutin IG. Effect of Ionizing Radiation from Computed Tomography on Differentiation of Human Embryonic Stem Cells into Neural Precursors. Int J Mol Sci 2019; 20:ijms20163900. [PMID: 31405104 PMCID: PMC6720494 DOI: 10.3390/ijms20163900] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 12/13/2022] Open
Abstract
We studied the effect of radiation from computed tomography (CT) scans on differentiation of human embryonic stem cells (hESCs) into neuronal lineage. hESCs were divided into three radiation exposure groups: 0-dose, low-dose, or high-dose exposure. Low dose was accomplished with a single 15 mGy CT dose index (CTDI) CT scan that approximated the dose for abdominal/pelvic CT examinations in adults while the high dose was achieved with several consecutive CT scans yielding a cumulative dose of 500 mGy CTDI. The neural induction was characterized by immunocytochemistry. Quantitative polymerase chain reaction (qPCR) and Western blots were used to measure expression of the neuronal markers PAX6 and NES and pluripotency marker OCT4. We did not find any visible morphological differences between neural precursors from irradiated and non-irradiated cells. However, quantitative analyses of neuronal markers showed that PAX6 expression was reduced following exposure to the high dose compared to 0-dose controls, while no such decrease in PAX6 expression was observed following exposure to the low dose. Similarly, a statistically significant reduction in expression of NES was observed following high-dose exposure, while after low-dose exposure, a modest but statistically significant reduction in NES expression was only observed on Day 8 of differentiation. Further studies are warranted to elucidate how lower or delayed expression of PAX6 and NES can impact human fetal brain development.
Collapse
Affiliation(s)
- Christine Hanu
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Burk W Loeliger
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Irina V Panyutin
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Roberto Maass-Moreno
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Paul Wakim
- Biostatistics and Clinical Epidemiology Service, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - William F Pritchard
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Ronald D Neumann
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA
| | - Igor G Panyutin
- Department of Radiology and Imaging Sciences, Clinical Center, NIH, 10 Center Dr., Bethesda, MD 20892, USA.
| |
Collapse
|
44
|
Dong S, Qian W, Liu T, Liu H, Du J, Zhao H, Gao F, Cai J. Repeated 0.2-Gy γ-Ray Irradiation Attenuates the Inflammatory Process and Endotoxin Damage Induced by Lipopolysaccharides. Dose Response 2019; 17:1559325819836355. [PMID: 31258453 PMCID: PMC6590103 DOI: 10.1177/1559325819836355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/22/2018] [Accepted: 10/25/2018] [Indexed: 12/31/2022] Open
Abstract
Endotoxin damage is an acute, multi-organ disease, the most typical symptoms of which are liver injury and inflammatory cytokine storm. Endotoxin tolerance is described as the pretreatment of lipopolysaccharides (LPS) before the toxin invasion, which is consistent with the adaptive response induced by low-dose radiation (LDR). In this study, we verified that LDR could resist the endotoxin damage by suppressing the increase of inflammatory cytokines, including interleukin 6, tumor necrosis factor, and NO, to improve the survival and relieve the inflammatory cell infiltration, in which low dose of LPS performed consistently with LDR.
Collapse
Affiliation(s)
- Suhe Dong
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Wen Qian
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Tingting Liu
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Hu Liu
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Jicong Du
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Hainan Zhao
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Fu Gao
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| | - Jianming Cai
- Faculty of Naval Medicine, Department of Radiation Medicine, Second Military Medical University, Shanghai, China
| |
Collapse
|
45
|
Quan Y, Lin J, Deng B. The response of human mesenchymal stem cells to internal exposure to tritium β-rays. J Radiat Res 2019; 60:476-482. [PMID: 31165153 PMCID: PMC6640910 DOI: 10.1093/jrr/rrz037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 02/04/2019] [Indexed: 05/04/2023]
Abstract
There is no doubt that estimating the exposure risk of external and internal low-dose radiation is an imperative issue in radiobiological study. Human mesenchymal stem cells (hMSCs) are multipotent and self-renewing, supporting the regeneration of damaged tissue, including tissue damaged by radiation. However, the responses of hMSCs to internal exposure to radionuclides are still insufficiently understood. In order to evaluate the adverse effects produced by internal exposure to tritiated water (HTO) at a low dose, hMSCs were exposed to 2 × 107 Bq/ml HTO, and the biological effects after the exposure were examined. Apoptosis and DNA double-strand breaks (DSBs) were assayed to analyze the cellular response to the damage induced by HTO. Slight enhancement of apoptosis was found after treatment, except at the dose of 9 mGy. The number of DSBs at 24 h post-irradiation showed that the DNA damage was able to be efficiently repaired by the hMSCs. Moreover, the increasing proportion of the cell population in S phase proved that the persistence of residual γH2AX foci at lower concentrations of HTO was attributable to the secondary production of DSBs in DNA replication. Our work adds to the available data, helping us understand the risk of stem cell transformation due to internal exposure and its correlation with low-dose radiation-induced carcinogenesis.
Collapse
Affiliation(s)
- Yi Quan
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, People’s Republic of China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, People’s Republic of China
| | - Jinxian Lin
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, People’s Republic of China
| | - Bing Deng
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, People’s Republic of China
- Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou, People’s Republic of China
| |
Collapse
|
46
|
Lu J, Zhang S, Politte DG, O’Sullivan JA. Low-dose photon counting CT reconstruction bias reduction with multi-energy alternating minimization algorithm. Proc SPIE Int Soc Opt Eng 2019; 11072:110721Q. [PMID: 32025078 PMCID: PMC7002020 DOI: 10.1117/12.2534897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Photon counting CT (PCCT) is an x-ray imaging technique that has undergone great development in the past decade. PCCT has the potential to improve dose efficiency and low-dose performance. In this paper, we propose a statistics-based iterative algorithm to perform a direct reconstruction of material-decomposed images. Compared with the conventional sinogram-based decomposition method which has degraded performance in low-dose scenarios, the multi-energy alternating minimization algorithm for photon counting CT (MEAM-PCCT) can generate accurate material-decomposed image with much smaller biases.
Collapse
Affiliation(s)
- Jingwei Lu
- Washington University in St. Louis, Department of Electrical and Systems Engineering, 1 Brookings Dr, St. Louis, MO 63130 USA
| | - Shuangyue Zhang
- Washington University in St. Louis, Department of Electrical and Systems Engineering, 1 Brookings Dr, St. Louis, MO 63130 USA
| | - David G. Politte
- Washington University School of Medicine, Electronic Radiology Laboratory, Mallinckrodt Institute of Radiology, St. Louis, MO 63110 USA
| | - Joseph A. O’Sullivan
- Washington University in St. Louis, Department of Electrical and Systems Engineering, 1 Brookings Dr, St. Louis, MO 63130 USA
| |
Collapse
|
47
|
Wang Z, Sugie C, Nakashima M, Kondo T, Iwata H, Tsuchiya T, Shibamoto Y. Changes in the Proliferation Rate, Clonogenicity, and Radiosensitivity of Cultured Cells During and After Continuous Low-Dose-Rate Irradiation. Dose Response 2019; 17:1559325819842733. [PMID: 31040760 PMCID: PMC6477768 DOI: 10.1177/1559325819842733] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/04/2019] [Accepted: 03/17/2019] [Indexed: 01/28/2023] Open
Abstract
We investigated the effects of continuous low-dose radiation on proliferation,
clonogenicity, radiosensitivity, and repair of DNA double-strand breaks (DSBs)
in human salivary gland (HSG) tumor cells. Human salivary gland cells were
cultured on acrylic boards above very-low-dose (4.3 μSv/h) or low-dose (27
μSv/h) radiation-emitting sheets or without sheets. Total cell numbers and
plating efficiencies were compared among the 3 groups every 1 or 2 weeks until 6
weeks after starting culture. At 2, 4, and 6 weeks, surviving fractions of HSG
cells after irradiation at 2 to 8 Gy cultured on the very-low-dose or low-dose
sheets were compared to those of the control. At 4 weeks, HSG cells irradiated
at 2 Gy were assessed for phosphorylated histone (γH2AX) foci formation, and
DSBs were evaluated. No significant differences were observed in total cell
number or plating efficiencies with or without low-dose-emitting sheets. The
surviving fractions after irradiation of the very-low-dose group at 2 to 6 weeks
and those of the low-dose group at 2 to 4 weeks were higher than those of the
control (P < .01). Thus, a radioadaptive response was
clearly demonstrated. From the γH2AX foci quantification, the adaptive responses
were considered to be associated with the efficient repair of DSB, especially
slow repair, in this cell line.
Collapse
Affiliation(s)
- Zhen Wang
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Chikao Sugie
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Masahiro Nakashima
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Takuhito Kondo
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Hiromitsu Iwata
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City West Medical Center, Nagoya, Japan
| | | | - Yuta Shibamoto
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| |
Collapse
|
48
|
Itagaki S, Wada T, Yokokura S, Ise Y, Sato A, Matsumoto T, Mashiko H, Niwa SI, Yabe H. Study of developmental disorders among newborns in Fukushima City after the Great East Japan Earthquake and nuclear power plant accident; an adjunct study of the Fukushima Regional Center of the Japan Environmental and Children's Study (JECS). Fukushima J Med Sci 2019; 65:1-5. [PMID: 30996215 DOI: 10.5387/fms.2018-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The present adjunct study of the Japan Environment and Children's Study (JECS) aimed to determine the occurrence of developmental disorders in Fukushima Prefecture, which was exposed to low-dose radiation. At two medical institutions in Fukushima City, we enrolled 339 pregnant women from September 2013 through May 31, 2014, who delivered 335 neonates (174 male, including one set of twins) between November 4, 2013 and November 11, 2014. The parents of four neonates declined to participate in the present study and one neonate died. Therefore, 334 families agreed to participate in additional surveys until March 2017. Child Behavior Checklists (CBCL) were mailed to all 334 families during the month of their infant's second birthday and we received 236 responses (response rate, 70%). All responses were below the 69th percentile in the CBCL, and no responses indicated significant problem behaviors. Boys tended to have higher values for items associated with developmental problems, but symptoms of autism were not evident. The mental health of the mothers indicated in the previous study might not have influenced the children. Autism spectrum disorder (ASD) is not obvious by the age of three years and thus it might become apparent as the children grow older.
Collapse
Affiliation(s)
- Shuntaro Itagaki
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Tomohiro Wada
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Shunya Yokokura
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Yoko Ise
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Akiko Sato
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Takatomo Matsumoto
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Hirobumi Mashiko
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Shin-Ichi Niwa
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| | - Hirooki Yabe
- Department of Neuropsychiatry, School of Medicine, Fukushima Medical University
| |
Collapse
|
49
|
Ji K, Wang Y, Du L, Xu C, Liu Y, He N, Wang J, Liu Q. Research Progress on the Biological Effects of Low-Dose Radiation in China. Dose Response 2019; 17:1559325819833488. [PMID: 30833876 PMCID: PMC6393828 DOI: 10.1177/1559325819833488] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/19/2018] [Accepted: 12/29/2018] [Indexed: 01/07/2023] Open
Abstract
Human are exposed to ionizing radiation from natural and artificial sources, which consequently poses a possible risk to human health. However, accumulating evidence indicates that the biological effects of low-dose radiation (LDR) are different from those of high-dose radiation (HDR). Low-dose radiation–induced hormesis has been extensively observed in different biological systems, including immunological and hematopoietic systems. Adaptive responses in response to LDR that can induce cellular resistance to genotoxic effects from subsequent exposure to HDR have also been described and researched. Bystander effects, another type of biological effect induced by LDR, have been shown to widely occur in many cell types. Furthermore, the influence of LDR-induced biological effects on certain diseases, such as cancer and diabetes, has also attracted the interest of researchers. Many studies have suggested that LDR has the potential antitumor and antidiabetic complications effects. In addition, the researches on whether LDR could induce stochastic effects were also debated. Studies on the biological effects of LDR in China started in 1970s and considerable progress has been made since. In the present article, we provide an overview of the research progress on the biological effects of LDR in China.
Collapse
Affiliation(s)
- Kaihua Ji
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Yan Wang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Liqing Du
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Chang Xu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Yang Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Ningning He
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Jinhan Wang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| | - Qiang Liu
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine, Department of Radiobiology, Institute of Radiation Medicine of Chinese Academy of Medical Science & Pecking Union Medical College, Tianjin, PR China
| |
Collapse
|
50
|
Wang S, Yu H, He R, Song X, Chen S, Yu N, Li W, Li F, Jiang Q. Exposure to Low-Dose Radiation Enhanced the Antitumor Effect of a Dendritic Cell Vaccine. Dose Response 2019; 17:1559325819832144. [PMID: 30828272 PMCID: PMC6388453 DOI: 10.1177/1559325819832144] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/25/2018] [Accepted: 01/22/2019] [Indexed: 01/07/2023] Open
Abstract
The unsatisfactory clinical efficacy of dendritic cell (DC)-based cancer vaccines prepared by conventional methods is partly due to their insufficient capacity for migration. Our previous study showed that exposure to low-dose radiation (LDR) at a dose of 0.2 Gy promoted DC migration in vitro. The present study further investigates whether exposure to LDR at a dose of 0.2 Gy during the DC vaccine preparation could increase the antitumor effect of DC vaccines derived from mouse bone marrow. Our results showed that the migratory capacities of DCs were significantly increased after exposure to LDR. Furthermore, exposure to LDR resulted in an increased ability of DCs to induce T-cell proliferation, and the cytotoxic effect of cytotoxic T lymphocytes (CTLs) primed by the DCs exposed to LDR was significantly enhanced. An in vivo study using a mouse transplanted tumor model showed that subcutaneous injections of a DC vaccine exposed to LDR led to an increased mouse survival rate, infiltration of CTLs into tumor tissue, and apoptosis of tumor cells, which were accompanied by significant upregulation of serum interferon γ and interleukin 12. These results indicate that exposing DCs to LDR during the DC vaccine preparation is an effective approach to enhance its antitumor effect.
Collapse
Affiliation(s)
- Sinian Wang
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Huijie Yu
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Rui He
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Xiujun Song
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Shu Chen
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China.,Huangsi Clinic of PLA Strategic Support Force, Beijing, China
| | - Nan Yu
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Wei Li
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Fengsheng Li
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| | - Qisheng Jiang
- Lab of Radiation Damage Research, The General Hospital of the PLA Rocket Force, Beijing, China
| |
Collapse
|