International journal of radiation biology最新文献

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γ-Radiations induced phytoconstituents variability in the grains of cultivated buckwheat species of Himalayan region. 喜马拉雅地区栽培荞麦品种谷粒中的γ射线诱导植物成分变异。
International journal of radiation biology Pub Date : 2024-11-19 DOI: 10.1080/09553002.2024.2430246
Nidhi Joshi, Kuldip Chandra Verma, Sanjay Kumar Verma, Pawanesh Tamta
{"title":"γ-Radiations induced phytoconstituents variability in the grains of cultivated buckwheat species of Himalayan region.","authors":"Nidhi Joshi, Kuldip Chandra Verma, Sanjay Kumar Verma, Pawanesh Tamta","doi":"10.1080/09553002.2024.2430246","DOIUrl":"https://doi.org/10.1080/09553002.2024.2430246","url":null,"abstract":"<p><strong>Purpose: </strong>Buckwheat is a major traditional crop of hilly regions, capable of growing in adverse climatic conditions. During the survey, it was reported that prolonged consumption of buckwheat leads to digestive problems and numbness. The present study was conducted to study the effect of γ-irradiations on buckwheat to make them suitable for daily consumption.</p><p><strong>Materials and methods: </strong>Buckwheat seeds were irradiated by 100, 200, 300, 400, 500, 600, 700, and 800 Gy doses of γ-radiations, to access the phytoconstituent variability using standard methods.</p><p><strong>Results: </strong>Significant (<i>p</i> < 0.05) increase in total phenol, total flavonoid, total antioxidant activity, rutin, β-carotene, iron, calcium up to 6.23, 16.48, 18.62, 19.06, 8.08, 47.66, 32.74% in common buckwheat and 9.58, 16.66, 39.16, 9.19, 9.00, 53.99, 36.75% in tartary buckwheat was found by increasing doses of γ-radiations up to 800 Gy. Significant decrease was found in phytate, tannin, and oxalate content up to 18.92, 17.95, 15.32% in common buckwheat and 24.73, 19.72, 24.07% in tartary buckwheat.</p><p><strong>Conclusions: </strong>It can be concluded that 800 Gy dose of γ-radiation, maximally increased the nutritional value by significant (<i>p</i> < 0.05) increase in nutrients and their bioavailability. This makes buckwheat more amenable for daily consumption to fulfill RDA, by Himalayan population depending on traditional foods without any digestive problem. Furthermore, significant increase in rutin by γ-radiations will be useful to fulfill the demand of cosmetic and pharmaceutical industries. But minimization of reduction loss for some nutrients by γ-radiations is the thrust area for future research.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IEPA, a novel radiation countermeasure, alleviates acute radiation syndrome in rodents. 新型辐射防护措施 IEPA 可减轻啮齿动物的急性辐射综合征。
International journal of radiation biology Pub Date : 2024-11-12 DOI: 10.1080/09553002.2024.2425312
Radoslaw Wesolowski, Brian L Fish, Michael Eibl, Stella Bähr, Srishti Munjal Mehta, Maciej T Czajkowski, Tracy Gasperetti, Christie M Orschell, Corinna Asang, Nikita Singh, Heather A Himburg, Dirk Pleimes
{"title":"IEPA, a novel radiation countermeasure, alleviates acute radiation syndrome in rodents.","authors":"Radoslaw Wesolowski, Brian L Fish, Michael Eibl, Stella Bähr, Srishti Munjal Mehta, Maciej T Czajkowski, Tracy Gasperetti, Christie M Orschell, Corinna Asang, Nikita Singh, Heather A Himburg, Dirk Pleimes","doi":"10.1080/09553002.2024.2425312","DOIUrl":"https://doi.org/10.1080/09553002.2024.2425312","url":null,"abstract":"<p><p>Repurposing therapeutic agents with existing clinical data is a common strategy for developing radiation countermeasures. IEPA (imidazolyl ethanamide pentandioic acid) is an orally bioavailable small molecule pseudopeptide with myeloprotective properties, a good clinical safety profile, and stable chemical characteristics facilitating stockpiling. Here, we evaluated IEPA's radiomitigative efficacy in the hematopoietic subsyndrome of acute radiation syndrome (H-ARS) using total-body irradiation (TBI) models in C57BL/6J mice and WAG/RijCmcr rats, applying various posology schemes and introducing syringe feeding of the IEPA formulation in the pudding. Additionally, we assessed IEPA in the delayed effects of acute radiation exposure (DEARE) model after partial-body irradiation (PBI) in WAG/RijCmcr rats. Endpoints included survival, body weight, hematology, and pulmonary parameters, depending on the model. Results from mouse and rat TBI models demonstrated survival improvements with repeated IEPA dosing at 10 mg/kg, with the largest benefits observed in the bi-daily (BID) treatment over the 30-day ARS phase in female rats. Survival across PBI-DEARE subsyndromes was comparable between IEPA and vehicle groups, though IEPA improved pulmonary parameters in female rats during the lung-DEARE phase. Sex-related differences in response to irradiation and IEPA were noted, with females showing a survival advantage. IEPA treatment is compatible with Neulasta® (Pegfilgrastim; PEG-G-CSF); adequately powered studies are needed to confirm the trend toward improved survival over standard care alone. IEPA is a promising development candidate as a medical countermeasure against the effects of acute radiation syndrome. Further confirmatory studies in small and large animal models should validate the robustness and translatability of preliminary rodent data on IEPA's radiomitigative efficacy.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Isolation and characterization of gamma rays induced mutants for improved agro-morphological performance and harder grain texture in wheat (Triticum aestivum L.). 分离和鉴定伽马射线诱导的突变体,以改善小麦(Triticum aestivum L.)的农业形态学性能和硬粒质地。
International journal of radiation biology Pub Date : 2024-11-11 DOI: 10.1080/09553002.2024.2425305
Amit Rana, Vijay Rana, Suman Bakshi, Vinod Kumar Sood
{"title":"Isolation and characterization of gamma rays induced mutants for improved agro-morphological performance and harder grain texture in wheat (<i>Triticum aestivum</i> L.).","authors":"Amit Rana, Vijay Rana, Suman Bakshi, Vinod Kumar Sood","doi":"10.1080/09553002.2024.2425305","DOIUrl":"https://doi.org/10.1080/09553002.2024.2425305","url":null,"abstract":"<p><strong>Purpose: </strong>Kernel texture plays a principal role in determining technological flour properties and end-use quality of wheat products. Hence, a multi-year mutation induction programme was conducted to isolate advanced wheat mutant lines with agro-morphologically superior performance, higher disease resistance and harder grain texture.</p><p><strong>Materials and methods: </strong>Radiation mutagenesis was employed in soft textured wheat variety HPW 89 using gamma rays dose of 250, 300 and 350 Gy (Co<sup>60</sup>: BARC, Mumbai) and evaluated across M<sub>1-5</sub> generations. Promising superior mutants selected were evaluated during M<sub>4</sub> and M<sub>5</sub> generation for induced variability and trait association for agro-morphological and quality traits. The screened mutants were also determined for induced changes at genetic level using gene specific markers for puroindoline genes.</p><p><strong>Results: </strong>A total of 293 agro-morphologically superior mutants isolated showed significant genetic variation in the M<sub>4</sub> generation. Single kernel characterization system categorized 267 mutants (8.79-50.06) with higher grain hardness than the HPW 89 variety (7.39). Among these, 108 mutants were selected for agro-morphological and molecular characterization. Significant variations were found in these mutants in either <i>pina</i> and <i>pinb</i> or both puroindoline genes. Clustering among these mutants led to the formation of five clusters and a total of eleven mutants were found with better set of agro-morphological, disease resistance and quality traits.</p><p><strong>Conclusion: </strong>These mutants can serve as important genetic resource for developing harder texture bread wheat varieties in the future grain quality improvement programmes. These mutants will also bridge the need of bakers and millers' requirement of varieties with specific texture and quality.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142635014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advantages of single high-dose radiation therapy compared with conventional fractionated radiation therapy in overcoming radioresistance. 与传统的分次放射治疗相比,单次大剂量放射治疗在克服放射抗性方面的优势。
International journal of radiation biology Pub Date : 2024-10-24 DOI: 10.1080/09553002.2024.2418493
Yun-Suk Kwon, Phuong Anh Nguyen, Hai Yen Dao, Hyunsoo Jang, Soyoung Kim
{"title":"Advantages of single high-dose radiation therapy compared with conventional fractionated radiation therapy in overcoming radioresistance.","authors":"Yun-Suk Kwon, Phuong Anh Nguyen, Hai Yen Dao, Hyunsoo Jang, Soyoung Kim","doi":"10.1080/09553002.2024.2418493","DOIUrl":"https://doi.org/10.1080/09553002.2024.2418493","url":null,"abstract":"<p><strong>Background: </strong>Radioresistance is a major clinical challenge in cancer treatment, as it reduces the effectiveness of radiation therapy (RT). While advances in radiation delivery have enabled the clinical use of high-dose hypofractionated RT, its impact on radioresistant tumors remains unclear. This study aimed to compare the effects of single high-dose RT with conventional fractionated RT on radioresistant breast cancer cells and explore the underlying mechanisms.</p><p><strong>Methods: </strong>Radioresistant cell lines were previously established by exposing SK-BR-3 and MCF-7 cells to 48 Gy and 70 Gy of radiation, respectively, in multiple fractions. We compared the effects of 2 Gy × 5 and 7 Gy × 1 fractions on these cells using clonogenic survival assays and western blot analysis. In vivo antitumor effects were assessed in SR tumor-bearing <i>BALB/c</i> mice irradiated with either 2 Gy × 5 or 7 Gy × 1 fractions.</p><p><strong>Results: </strong>7 Gy x1 was more efficient at killing radioresistant breast cancer cells than 2 Gy x5. Furthermore, the 7 Gy x1 fraction produced higher levels of reactive oxygen species (ROS) and decreased the expression of radioresistance factors such as p-STAT3, ACSL4, FOXM1, RAD51, Bcl-xL, and survivin. Consistent with the in vitro studies, the 7 Gy × 1 fraction also showed superior antitumor effects in SR tumor-bearing <i>BALB/c</i> mice.</p><p><strong>Conclusions: </strong>Single high-dose RT offers superior advantages over conventional fractionated RT in regard to overcoming radioresistance, supporting its potential as a promising treatment for recurrent tumors.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515317","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Technetium-99m radiolabeling of graphene quantum dots (GQDs) as a new probe for glioblastoma tumor imaging. 石墨烯量子点(GQDs)的锝-99m放射性标记作为胶质母细胞瘤肿瘤成像的新探针。
International journal of radiation biology Pub Date : 2024-09-26 DOI: 10.1080/09553002.2024.2404460
Maryam Mazaheri Tehrani, Mostafa Erfani, Mojtaba Amiri, Mostafa Goudarzi
{"title":"Technetium-99m radiolabeling of graphene quantum dots (GQDs) as a new probe for glioblastoma tumor imaging.","authors":"Maryam Mazaheri Tehrani, Mostafa Erfani, Mojtaba Amiri, Mostafa Goudarzi","doi":"10.1080/09553002.2024.2404460","DOIUrl":"https://doi.org/10.1080/09553002.2024.2404460","url":null,"abstract":"<p><strong>Purpose: </strong>Cancer diagnosis involves a multi-step process. Accurate identification of the tumor, staging and development of cancer cells is crucial for selecting optimal treatments to minimize disease recurrence. Quantum dots (QDs) represent an exciting class of fluorescent nanoprobes in molecular detection and targeted tumor imaging.</p><p><strong>Materials and methods: </strong>In this study, graphene quantum dots (GQDs) were synthesized by pyrolysis of citric acid (CA) as a carbon precursor under high temperatures. The morphology of the obtained GQDs was first characterized using physical (TEM and DLS) and spectroscopic (fluorescence, FTIR and UV-Vis) methods. In the following,<sup>99m</sup>Tc-labeled GQDs were prepared in the presence of SnCl<sub>2</sub>.2H<sub>2</sub>O as a reducing agent between 95 and 100 °C. The biodistribution and tumor targeting efficiency of radiolabeled GQDs as a novel agent for C6 glioma tumor scintigraphy in an animal model were evaluated. Furthermore, organ uptake, human serum albumin binding and tumor accumulation were measured.</p><p><strong>Results: </strong>The TEM image of the prepared GQDs showed a relatively uniform size distribution in the range of diameter 6-9 nm and spherical shape. Radiolabeled GQDs showed a radiochemical yield of >97% (<i>n</i> = 3). Through incubation in human serum, almost 15% of <sup>99m</sup>Tc-labeled GQDs degraded after 6 h. The amount of uptake in xenograft models of glioma C6 rats was 1.10 ± 0.36% of injection dose per gram after 1 h. The kidneys, intestinal and glioma tumor sites were observed via scintigraphy imaging.</p><p><strong>Conclusion: </strong>Our data suggest that <sup>99m</sup>Tc-labeled GQDs, as a new radiotracer, efficiently accumulate in the tumor site and could be included as a radiotracer for detecting glioma tumors.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Melatonin as a radioprotective agent against flattening filter and flattening filter-free beam in radiotherapy-induced lung tissue damage. 褪黑素是一种放射保护剂,可防止放疗引起的肺组织损伤中的扁平化滤光片和无扁平化滤光片光束。
International journal of radiation biology Pub Date : 2024-07-29 DOI: 10.1080/09553002.2024.2381492
Zuhal Özer Simsek, Serhat Aras, Makbule Cikrikcioglu, Kursad Nuri Baydili, Mustafa Cortuk
{"title":"Melatonin as a radioprotective agent against flattening filter and flattening filter-free beam in radiotherapy-induced lung tissue damage.","authors":"Zuhal Özer Simsek, Serhat Aras, Makbule Cikrikcioglu, Kursad Nuri Baydili, Mustafa Cortuk","doi":"10.1080/09553002.2024.2381492","DOIUrl":"https://doi.org/10.1080/09553002.2024.2381492","url":null,"abstract":"<p><strong>Background: </strong>Radiotherapy is a widely used treatment method in oncology, applied by delivering high-energy particles or waves to the tumor tissue. Although tumor cells are targeted with radiotherapy, it can cause acute or long-term damage to healthy tissues. Therefore, the preservation of healthy tissues has been an important subject of various scientific researches. Melatonin has been shown to have a radioprotective effect on many tissues and organs such as liver, parotid gland, brain, and testicles. This study aimed to evaluate the protective effect of melatonin against the radiation at various doses and rates administered to the lung tissue of healthy mice.</p><p><strong>Methods: </strong>This study was a randomized case-control study conducted with 80 rats comprising 10 groups with eight animals per group. Of the 10 groups, first is the control group, which is not given any melatonin, and second is the group that does not receive RT, which is given only melatonin, and the other eight groups are RT groups, four with melatonin and four without melatonin.</p><p><strong>Results: </strong>There was no statistical difference in terms of histopathological findings in the lung tissue between the second group, which did not receive radiotherapy and received only melatonin, and the control group. Lung damage due to radiotherapy was statistically significantly higher in the groups that did not receive melatonin compared to the groups that received melatonin.</p><p><strong>Conclusions: </strong>This study revealed that melatonin has a protective effect against the cytotoxic damage of RT in rats receiving RT.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141794415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gamma irradiation in modulating arsenic bioremediation potential of Pseudomonas sp. AK1 and AK9. 伽马辐照在调节 AK1 和 AK9 假单胞菌砷生物修复潜力方面的作用。
International journal of radiation biology Pub Date : 2024-04-24 DOI: 10.1080/09553002.2024.2345137
G. K. Satyapal, Rizwanul Haque, Nitish Kumar
{"title":"Gamma irradiation in modulating arsenic bioremediation potential of Pseudomonas sp. AK1 and AK9.","authors":"G. K. Satyapal, Rizwanul Haque, Nitish Kumar","doi":"10.1080/09553002.2024.2345137","DOIUrl":"https://doi.org/10.1080/09553002.2024.2345137","url":null,"abstract":"PURPOSE\u0000Present study deals with the role of gamma irradiation in modulating arsenic bioremediation of Pseudomonas sp. AK1 and AK9 strains.\u0000\u0000\u0000MATERIALS AND METHODS\u0000The bacterial strains AK1 and AK9 of Pseudomonas sp. were irradiated at different doses (5 Gy, 10 Gy, 15 Gy and 20 Gy) of gamma irradiation. The effect of γ-irradiation on the growth and arsenic modulating ability of AK1 and AK9 strains was determined in the presence and absence of arsenic along with non-irradiated strains. Further, a comparative study of non-irradiated and irradiated strains by protein profiling in absence and presence of arsenic was carried out to confirm of the increased expression ofarsenite oxidase.\u0000\u0000\u0000RESULTS\u0000Both strains were able to transform AsIII to AsV. Both strains AK1 and AK9 decrease the arsenic concentration by 626.68 ppb (13.36%) and 686.40 ppb (14.71%) after an incubation period of 96 h in presence of arsenic. Gamma irradiated AK9 strains showed doubled growth in presence of arsenic as compared to non-irradiated strains at 10 Gy treatment whereas no changes in growth was observed in irradiated AK1 strains. Gamma irradiated AK9 strain decrease 378.65 ppb (7.27%) more arsenic concentration from natural water sample supplemented with AsIII than non-irradiated AK9 strain. Further, in the protein profile, increased expression of arsenite oxidase (∼85 kDa) was observed in irradiated AK9 strains in presence of arsenic.\u0000\u0000\u0000CONCLUSIONS\u0000Overall, the results suggested that the gamma irradiated AK9 strain having potential for arsenic accumulation and increased arsenite tolerance may play a great role in the bioremediation of the arsenite at arsenic contaminated sites.","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":"93 3","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140659394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Correction. 更正。
International journal of radiation biology Pub Date : 2024-04-24 DOI: 10.1080/09553002.2024.2347189
{"title":"Correction.","authors":"","doi":"10.1080/09553002.2024.2347189","DOIUrl":"https://doi.org/10.1080/09553002.2024.2347189","url":null,"abstract":"","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":"59 12","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140665619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diffusion tensor imaging parameters for the early diagnosis of radiation-induced brain injury in patients with nasopharyngeal carcinoma: a meta-analysis. 扩散张量成像参数对鼻咽癌患者放射性脑损伤的早期诊断:一项荟萃分析。
International journal of radiation biology Pub Date : 2024-01-01 Epub Date: 2024-01-16 DOI: 10.1080/09553002.2023.2280010
Yu Shao, Zhenbo Wang, Juping Chen, Junchen Li
{"title":"Diffusion tensor imaging parameters for the early diagnosis of radiation-induced brain injury in patients with nasopharyngeal carcinoma: a meta-analysis.","authors":"Yu Shao, Zhenbo Wang, Juping Chen, Junchen Li","doi":"10.1080/09553002.2023.2280010","DOIUrl":"10.1080/09553002.2023.2280010","url":null,"abstract":"<p><strong>Purpose: </strong>To estimate diffusion tensor imaging (DTI) parameters for early diagnosis during the stage of radiation-induced brain injury (RBI) in nasopharyngeal carcinoma (NPC) patients.PubMed, Embase, Web of Science and Cochrane Library were searched up to March 2019. Eligible studies comparing early brain injuries with controls of temporal lobe in NPC patients before and after radiotherapy which collected the DTI parameters such as apparent diffusion coefficient (ADC), fractional anisotropy (FA), axial diffusibility (λa), radial diffusibility (λr), mean diffusion (MD) were included.</p><p><strong>Conclusion: </strong>Seven studies (N = 21) were selected from the studies in the databases. Overall, FA, λa, λr values were significant difference between early RBI and healthy control (HC) in NPC patients after radiotherapy (MD= -0.03, 95% CI= -0.05∼-0.01; <i>p</i> = .008 in FA, MD= -0.07, 95% CI= -0.11∼-0.02; <i>p</i> = .002 in λa and MD = 0.02, 95% CI = 0.00 ∼ 0.04; <i>p</i> = .04 in λr). The meta regression analysis about dose dependence with FA value was: -0.057 ∼ 0.0003 in 95% CI, <i>I</i><sup>2</sup>=74.70%, <i>P</i> = 0.052 (adjust <i>p</i> = .029). The overall heterogeneity is <i>p</i> < .001, <i>I</i><sup>2</sup>=91% in FA, <i>P</i> = 0.08, <i>I</i><sup>2</sup>=61% in λa and <i>p</i> = .04, <i>I</i><sup>2</sup>=69% in λr. DTI parameters such as the reduced FA value, the decreased λa value, and the increased λr value were significant in the early period of RBI in NPC patients after radiotherapy, which becoming a more sensitive method in diagnosing the early stage of RBI.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"335-342"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71490474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recommendations on statistical approaches to account for dose uncertainties in radiation epidemiologic risk models. 关于在辐射流行病学风险模型中考虑剂量不确定性的统计方法的建议。
International journal of radiation biology Pub Date : 2024-01-01 Epub Date: 2024-07-26 DOI: 10.1080/09553002.2024.2381482
Michael B Bellamy, Jonine L Bernstein, Harry M Cullings, Benjamin French, Helen A Grogan, Kathryn D Held, Mark P Little, Carmen D Tekwe
{"title":"Recommendations on statistical approaches to account for dose uncertainties in radiation epidemiologic risk models.","authors":"Michael B Bellamy, Jonine L Bernstein, Harry M Cullings, Benjamin French, Helen A Grogan, Kathryn D Held, Mark P Little, Carmen D Tekwe","doi":"10.1080/09553002.2024.2381482","DOIUrl":"10.1080/09553002.2024.2381482","url":null,"abstract":"<p><strong>Purpose: </strong>Epidemiological studies of stochastic radiation health effects such as cancer, meant to estimate risks of the adverse effects as a function of radiation dose, depend largely on estimates of the radiation doses received by the exposed group under study. Those estimates are based on dosimetry that always has uncertainty, which often can be quite substantial. Studies that do not incorporate statistical methods to correct for dosimetric uncertainty may produce biased estimates of risk and incorrect confidence bounds on those estimates. This paper reviews commonly used statistical methods to correct radiation risk regressions for dosimetric uncertainty, with emphasis on some newer methods. We begin by describing the types of dose uncertainty that may occur, including those in which an uncertain value is shared by part or all of a cohort, and then demonstrate how these sources of uncertainty arise in radiation dosimetry. We briefly describe the effects of different types of dosimetric uncertainty on risk estimates, followed by a description of each method of adjusting for the uncertainty.</p><p><strong>Conclusions: </strong>Each of the method has strengths and weaknesses, and some methods have limited applicability. We describe the types of uncertainty to which each method can be applied and its pros and cons. Finally, we provide summary recommendations and touch briefly on suggestions for further research.</p>","PeriodicalId":94057,"journal":{"name":"International journal of radiation biology","volume":" ","pages":"1393-1404"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11421978/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141763564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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