Radiation research最新文献

筛选
英文 中文
Introduction for the ConRad 2023 Focus Issue. ConRad 2023 焦点问题简介。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-05-01 DOI: 10.1667/RADE-24-INTRO.1
Colonel Mc Prof Dr Matthias Port
{"title":"Introduction for the ConRad 2023 Focus Issue.","authors":"Colonel Mc Prof Dr Matthias Port","doi":"10.1667/RADE-24-INTRO.1","DOIUrl":"https://doi.org/10.1667/RADE-24-INTRO.1","url":null,"abstract":"","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140877160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Radiation Biological Toximetry Using Circulating Cell-Free DNA (cfDNA) for Rapid Radiation/Nuclear Triage. 利用循环游离细胞 DNA (cfDNA) 进行辐射/核快速分诊的辐射生物毒性测量法。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-25 DOI: 10.1667/RADE-23-00159.1
P. Okunieff, Steven G Swarts, Bruce Fenton, Stephen B Zhang, Zhenhuan Zhang, Lori Rice, Daohong Zhou, France Carrier, Lurong Zhang
{"title":"Radiation Biological Toximetry Using Circulating Cell-Free DNA (cfDNA) for Rapid Radiation/Nuclear Triage.","authors":"P. Okunieff, Steven G Swarts, Bruce Fenton, Stephen B Zhang, Zhenhuan Zhang, Lori Rice, Daohong Zhou, France Carrier, Lurong Zhang","doi":"10.1667/RADE-23-00159.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00159.1","url":null,"abstract":"Optimal triage biodosimetry would include risk stratification within minutes, and it would provide useful triage despite heterogeneous dosimetry, cytokine therapy, mixed radiation quality, race, and age. For regulatory approval, the U.S. Food and Drug Administration (FDA) Biodosimetry Guidance requires suitability for purpose and a validated species-independent mechanism. Circulating cell-free DNA (cfDNA) concentration assays may provide such triage information. To test this hypothesis, cfDNA concentrations were measured in unprocessed monkey plasma using a branched DNA (bDNA) technique with a laboratory developed test. Therefore, cfDNA concentration measurements are increasingly used in radiation oncology clinics to predict side effect risk. The cfDNA levels, along with hematopoietic parameters, were measured over a 7-day period in Rhesus macaques receiving total body radiation doses ranging from 1 to 6.5 Gy. Low-dose irradiation (0-2 Gy) was easily distinguished from high-dose whole-body exposures (5.5 and 6.5 Gy). Fold changes in cfDNA in the monkey model were comparable to those measured in a bone marrow transplant patient receiving a supralethal radiation dose, suggesting that the lethal threshold of cfDNA concentrations may be similar across species. Average cfDNA levels were 50 ± 40 ng/mL [±1 standard deviation (SD)] pre-irradiation, 120 ± 13 ng/mL at 1 Gy; 242 ± 71 ng/mL at 2 Gy; 607 ± 54 at 5.5 Gy; and 1585 ± 351 at 6.5 Gy (±1 SD). There was an exponential increase in cfDNA concentration with radiation dose. Comparison of the monkey model with the mouse model and the Guskova model, developed using Chernobyl responder data, further demonstrated correlation across species, supporting a similar mechanism of action. The test is available commercially in a Clinical Laboratory Improvement Amendments (CLIA) ready form in the U.S. and the European Union. The remaining challenges include developing methods for further simplification of specimen processing and assay evaluation, as well as more accurate calibration of the triage category with cfDNA concentration cutoffs.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140654796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Updated Analysis of Radon Exposure and Lung Cancer Mortality in the Cohort of Newfoundland Fluorspar Miners (1950-2016). 纽芬兰萤石矿工队列中氡暴露和肺癌死亡率的最新分析(1950-2016 年)。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-23 DOI: 10.1667/RADE-23-00114.1
Paul J. Villeneuve, Howard I. Morrison, R. Lane
{"title":"Updated Analysis of Radon Exposure and Lung Cancer Mortality in the Cohort of Newfoundland Fluorspar Miners (1950-2016).","authors":"Paul J. Villeneuve, Howard I. Morrison, R. Lane","doi":"10.1667/RADE-23-00114.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00114.1","url":null,"abstract":"The commercial mining of fluorspar in St. Lawrence Newfoundland began in 1933. Miners who worked underground were exposed to high levels of radon progeny, especially before ventilation was introduced into the mines in 1960. The mean cumulative radon exposure for underground miners in this cohort was 380.9 working level months (WLM). A series of studies of this cohort have characterized the increased risks of lung cancer mortality due to radon. We have extended the follow-up of this cohort an additional 15 years to provide additional insights on the risks of low levels of radon exposure, and the modifying effects of time since exposure, age at first exposure, attained age, duration of exposure, and cigarette smoking. The cohort consisted of 1,735 underground and 315 male surface miners who, combined, accrued 81,650 person-years of follow-up. The mortality experience of the cohort was determined from 1950-2016 through record linkage to Canadian national death data. Individual-level estimates of exposure to radon progeny, in WLMs, were determined for each year of employment. We compared the mortality experience of the underground miners to Newfoundland men using the standardized mortality ratio (SMR). Poisson regression models were fit to estimate excess relative risks (ERR) per 100 WLM. There were 236 lung cancer deaths identified, and of these, 221 occurred among underground workers. The SMR for lung cancer among underground miners compared to Newfoundland men was 2.67 (95% CI: 2.33, 3.04). The ERR per 100 WLM for lung cancer mortality, assuming a 5-year exposure lag, was 0.41 (95% CI: 0.23, 0.59). Attained age and time since exposure were important modifiers to the radon-lung cancer relationship. The joint relationship between smoking and radon on lung cancer risk was sub-additive, however, the smoking data were limited and available for only half of the cohort.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Partial-Body, Continuous/Pulse Irradiation at Dose Rates from Flash to Conventional Rates on The Level of Surviving Blood Lymphocytes: Modeling Approach II. Two- and Multiple-Pulse Irradiation. 从闪光到常规剂量率的局部全身连续/脉冲辐照对存活血液淋巴细胞水平的影响:建模方法 II.双脉冲和多脉冲辐照。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-16 DOI: 10.1667/RADE-23-00221.1
Francis A. Cucinotta, Olga A Smirnova
{"title":"Effects of Partial-Body, Continuous/Pulse Irradiation at Dose Rates from Flash to Conventional Rates on The Level of Surviving Blood Lymphocytes: Modeling Approach II. Two- and Multiple-Pulse Irradiation.","authors":"Francis A. Cucinotta, Olga A Smirnova","doi":"10.1667/RADE-23-00221.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00221.1","url":null,"abstract":"Mathematical models, which describe effects of partial-body, two- and multiple-pulse irradiation at high total doses D and at average dose rates N from FLASH to conventional rates on the level of surviving blood lymphocytes in humans and mice, have been developed originating in the previously proposed approach. These models predict that levels of surviving blood lymphocytes in humans and mice increase with increasing the dose rate from N = D / TR (TR is the time of the blood flowing into or out of the irradiated segment of the blood circulatory system) to FLASH rates and approach an upper limiting level equal to (1- vR), where vR is the fraction of blood volume in the irradiated segment of the blood circulatory system. Levels of surviving blood lymphocytes computed at total doses D of 10-40 Gy and at average of dose rates N, which are equal to or exceed 40 Gy/s for humans and 400 Gy/s for mice, are nearly indistinguishable from the upper limiting level. These results can be interpreted as the models reproducing the optimal blood lymphocyte sparing in these mammals after such exposures. With decreasing the dose rate from N = D/ TR to conventional rates, at multiple-pulse irradiation the levels of surviving blood lymphocytes in humans and mice decrease to lower limiting levels, whereas at two-pulse irradiation they change cyclically and do not fall below their values for the delivery time equal to TR. Additionally, effects of two- and multiple-pulse irradiation of the whole abdomen in mice on the level of surviving blood lymphocytes are simulated within the developed models. Regimens of two- and multiple-pulse irradiation are taken the same as those reported in experiments, where effects of such exposures on the level of surviving crypts in mice were studied. Juxtaposing the modeling results with the experimental data reveals that the level of surviving blood lymphocytes in mice after two- and multiple-pulse irradiation of the abdomen at average dose rates N from FLASH to conventional rates modulates the level of surviving crypts in these animals after such exposures. A hypothesis is proposed to explain this phenomenon.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140698848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Partial-Body, Continuous/Pulse Irradiation at Dose Rates from Flash to Conventional Rates on the Level of Surviving Blood Lymphocytes: Modeling Approach. I. Continuous Irradiation. 从闪光到常规剂量率的局部全身连续/脉冲辐照对存活血液淋巴细胞水平的影响:建模方法。I. 连续辐照。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-15 DOI: 10.1667/RADE-23-00222.1
Francis A. Cucinotta, Olga A Smirnova
{"title":"Effects of Partial-Body, Continuous/Pulse Irradiation at Dose Rates from Flash to Conventional Rates on the Level of Surviving Blood Lymphocytes: Modeling Approach. I. Continuous Irradiation.","authors":"Francis A. Cucinotta, Olga A Smirnova","doi":"10.1667/RADE-23-00222.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00222.1","url":null,"abstract":"A mathematical model developed by Cucinotta and Smirnova is extended to describe effects of continuous, partial-body irradiation at high doses D and at dose N rates from FLASH to conventional rates on the level of surviving blood lymphocytes in humans and small laboratory animals (mice). Specifically, whereas the applicability of the model is limited to the exposure times shorter than a single cardiac cycle T0, the extended model is capable of describing such effects for the aforementioned and longer exposure times. The extended model is implemented as the algebraic equations. It predicts that the level of surviving blood lymphocytes in humans and mice increases with increasing the dose rate from N = D / T0 to FLASH rates and approaches the upper limiting level of 1 - v R where v R is the fraction of blood volume in the irradiated part of the blood circulatory system. Levels of surviving blood lymphocytes computed at doses from 10 Gy to 40 Gy and at dose rates N, which equal or exceed 40 Gy/s for humans and 400 Gy/s for mice, are nearly indistinguishable from the upper limiting level. In turn, the level of surviving blood lymphocytes in humans and mice decreases with decreasing the dose rate from N = D / T0 to conventional rates and approaches a lower limiting level. This level strongly depends on the dose D (it is smaller at larger values of D) with a slight dependence on the dose rate N. The model with the parameters specified for mice (together with the model of the dynamics of lymphopoietic system in mice after partial-body irradiation) reproduce, on a quantitative level, the experimental data, according to which the concentration of blood lymphocytes measured in mice in one day after continuous, partial-body irradiation at a high dose and conventional dose rate is smaller at the larger value of vR. Additionally, the model predicts at the same high dose (>10 Gy) a faster restoration of the blood lymphocyte population in humans exposed to continuous, partial-body irradiation at a FLASH dose rate compared to a conventional dose rate.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140701684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Gastrointestinal Acute Radiation Syndrome: Mechanisms, Models, Markers, and Medical Countermeasures. 胃肠道急性辐射综合征:机理、模型、标记物和医疗对策。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-15 DOI: 10.1667/RADE-23-00196.1
Thomas A Winters, Libero Marzella, Olivia Molinar-Inglis, Paul W. Price, Nyun Calvin Han, Jonathan E Cohen, Sue-Jane Wang, Anthony F Fotenos, Julie M. Sullivan, John E. Esker, Paula J Lapinskas, A. DiCarlo
{"title":"Gastrointestinal Acute Radiation Syndrome: Mechanisms, Models, Markers, and Medical Countermeasures.","authors":"Thomas A Winters, Libero Marzella, Olivia Molinar-Inglis, Paul W. Price, Nyun Calvin Han, Jonathan E Cohen, Sue-Jane Wang, Anthony F Fotenos, Julie M. Sullivan, John E. Esker, Paula J Lapinskas, A. DiCarlo","doi":"10.1667/RADE-23-00196.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00196.1","url":null,"abstract":"There have been a number of reported human exposures to high dose radiation, resulting from accidents at nuclear power plants (e.g., Chernobyl), atomic bombings (Hiroshima and Nagasaki), and mishaps in industrial and medical settings. If absorbed radiation doses are high enough, evolution of acute radiation syndromes (ARS) will likely impact both the bone marrow as well as the gastrointestinal (GI) tract. Damage incurred in the latter can lead to nutrient malabsorption, dehydration, electrolyte imbalance, altered microbiome and metabolites, and impaired barrier function, which can lead to septicemia and death. To prepare for a medical response should such an incident arise, the National Institute of Allergy and Infectious Diseases (NIAID) funds basic and translational research to address radiation-induced GI-ARS, which remains a critical and prioritized unmet need. Areas of interest include identification of targets for damage and mitigation, animal model development, and testing of medical countermeasures (MCMs) to address GI complications resulting from radiation exposure. To appropriately model expected human responses, it is helpful to study analogous disease states in the clinic that resemble GI-ARS, to inform on best practices for diagnosis and treatment, and translate them back to inform nonclinical drug efficacy models. For these reasons, the NIAID partnered with two other U.S. government agencies (the Biomedical Advanced Research and Development Authority, and the Food and Drug Administration), to explore models, biomarkers, and diagnostics to improve understanding of the complexities of GI-ARS and investigate promising treatment approaches. A two-day workshop was convened in August 2022 that comprised presentations from academia, industry, healthcare, and government, and highlighted talks from 26 subject matter experts across five scientific sessions. This report provides an overview of information that was presented during the conference, and important discussions surrounding a broad range of topics that are critical for the research, development, licensure, and use of MCMs for GI-ARS.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140703238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FAILLA MEMORIAL LECTUREHow We Got Here: One Laboratory's Odyssey in the Field of Radiation-Inducible Genes. 费拉纪念讲座:我们是如何到达这里的?一个实验室在辐射诱导基因领域的奥德赛。
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-04 DOI: 10.1667/RADE-23-00205.1
Arslon Humayun, Lorreta Yun-Tien Lin, Henghong Li, A. Fornace
{"title":"FAILLA MEMORIAL LECTUREHow We Got Here: One Laboratory's Odyssey in the Field of Radiation-Inducible Genes.","authors":"Arslon Humayun, Lorreta Yun-Tien Lin, Henghong Li, A. Fornace","doi":"10.1667/RADE-23-00205.1","DOIUrl":"https://doi.org/10.1667/RADE-23-00205.1","url":null,"abstract":"This review focuses on early discoveries that contributed to our understanding and the scope of transcriptional responses after radiation damage. Before the development of modern approaches to assess overall global transcriptomic responses, the idea that mammalian cells could respond to DNA-damaging agents in a manner analogous to bacteria was not generally accepted. To investigate this possibility, the development of technology to identify differentially expressed low-abundance transcripts substantially facilitated our appreciation that DNA damaging agents like UV radiation and subsequently ionizing radiation did in fact produce robust transcriptional responses. Here we focus on our identification and characterization of radiation-inducible genes, and how even early studies on stress gene signaling highlighted the broad scope of transcriptional responses to radiation damage. Since then, the central role of transcriptional responses to radiation injury in maintaining genome integrity has been highlighted in many processes, including cell cycle checkpoint control, resistance to cancer by p53 and other key factors, cell senescence, and metabolism.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140744596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CPNE1, A Potential Therapeutic Target in Nasopharyngeal Carcinoma, Affects Cell Growth and Radiation Resistance. 鼻咽癌的潜在治疗靶点 CPNE1 影响细胞生长和抗辐射能力
IF 2.5 3区 医学
Radiation research Pub Date : 2024-04-01 DOI: 10.1667/RADE-23-00220.1
Shujuan Zhu, Rui Li, Kun Yin, Liming Wu
{"title":"CPNE1, A Potential Therapeutic Target in Nasopharyngeal Carcinoma, Affects Cell Growth and Radiation Resistance.","authors":"Shujuan Zhu, Rui Li, Kun Yin, Liming Wu","doi":"10.1667/RADE-23-00220.1","DOIUrl":"10.1667/RADE-23-00220.1","url":null,"abstract":"<p><p>The increased expression of Copine 1 (CPNE1) has been observed in various cancers, which promotes cell proliferation, apoptosis, and radio resistance. However, the potential mechanism of CPNE1 in nasopharyngeal carcinoma (NPC) remains elusive. Consequently, our objective was to investigate the role of CPNE1 in regulating proliferation and radio resistance of NPC. CPNE1 expression in NPC and normal patients were obtained from Cancer Genome Atlas (TCGA) database. An elevated CPNE1 was observed in NPC patients and cells (C666-1, SUNE-1, and HNE-1). Then, C666-1 and SUNE-1 cells were subjected to si-CPNE1 under different radiations (0-8 Gy). Cell growth and proliferation were measured by CCK8 and EDU assays, which demonstrated si-CPNE1 suppressed proliferation. Colony formation was performed to detect cell viability under different radiation therapy and survival curve of cell was plotted, which indicated that CPNE1 knockdown improved cell radiosensitivity. Additionally, flow cytometry showed silence of CPNE1 enhanced apoptosis rate in radiated cells. To further investigate the mechanisms of CPNE1 regulating NPC, the expression of activated phosphate Akt (p-Akt) was assessed through western blotting. We observed elevated p-Akt in si-CPNE1 transfected C666-1 and SUNE-1 cells. In conclusion, these results demonstrated that CPNE1 expression is elevated in nasopharyngeal carcinoma cells, and its silencing could attenuate nasopharyngeal carcinoma advancement and improve radiosensitivity to radiation therapy by controlling Akt activation.</p>","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139735885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Connexin 43 Prevents Radiation-Induced Intestinal Damage via the Ca2+-Dependent PI3K/Akt Signaling Pathway. 连接蛋白 43 通过 Ca2+ 依赖性 PI3K/Akt 信号通路防止辐射诱发的肠道损伤
IF 3.4 3区 医学
Radiation research Pub Date : 2024-04-01 DOI: 10.1667/RADE-22-00190.1
Yue Zhu, Jun Dai, Bin Song, Yuehua Zhang, Tingyi Yang, Hongwei Xu, Xiaopeng Xu, Yi Gao, Tao Yan, Weidong Shen, Wenhao Zhang, Shuyu Zhang, Pengfei Liu
{"title":"Connexin 43 Prevents Radiation-Induced Intestinal Damage via the Ca2+-Dependent PI3K/Akt Signaling Pathway.","authors":"Yue Zhu, Jun Dai, Bin Song, Yuehua Zhang, Tingyi Yang, Hongwei Xu, Xiaopeng Xu, Yi Gao, Tao Yan, Weidong Shen, Wenhao Zhang, Shuyu Zhang, Pengfei Liu","doi":"10.1667/RADE-22-00190.1","DOIUrl":"https://doi.org/10.1667/RADE-22-00190.1","url":null,"abstract":"Radiation-induced intestinal damage (RIID) is a common side effect of radiotherapy in patients with abdominopelvic malignancies. Gap junctions are special structures consisting of connexins (Cxs). This study aimed to investigate the expression and role of connexins in RIID and underlying mechanism. In this study, a calcein-AM fluorescence probe was used to detect changes in gap junctional intercellular communication in intestinal epithelial IEC-6 cells. Our results show that gap junctional intercellular communication of IEC-6 cells was reduced at 6, 12, 24, and 48 h after irradiation, with the most pronounced effect at 24 h. Western blotting and immunofluorescence results showed that the expression of Cx43, but not other connexins, was reduced in irradiated intestinal epithelial cells. Silencing of Cx43 reduced gap junctional intercellular communication between irradiated intestinal epithelial cells with increased ROS and intracellular Ca2+ levels. Furthermore, knockdown of Cx43 reduced the number of clonal clusters, decreased cell proliferation with increased cytotoxicity and apoptosis. Western blotting results showed that silencing of Cx43 resulted in changed γ-H2AX and PI3K/AKT pathway proteins in irradiated intestinal epithelial cells. Administration of the PI3K/AKT pathway inhibitor LY294002 inhibited the radioprotective effects in Cx43-overexpressing intestinal epithelial cells. Our study demonstrated that Cx43 expression is decreased by ionizing radiation, which facilitates the radioprotection of intestinal epithelial cells.","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140793518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highlighting the NIAID Radiation and Nuclear Countermeasures Program's Commitment to Training and Diversifying the Radiation Workforce. 强调美国国立卫生研究院(NIAID)辐射与核对策计划致力于培训辐射工作人员并使其多样化。
IF 2.5 3区 医学
Radiation research Pub Date : 2024-04-01 DOI: 10.1667/RADE-23-00207.1
Olivia Molinar-Inglis, LeShawndra N Price, Andrea L DiCarlo
{"title":"Highlighting the NIAID Radiation and Nuclear Countermeasures Program's Commitment to Training and Diversifying the Radiation Workforce.","authors":"Olivia Molinar-Inglis, LeShawndra N Price, Andrea L DiCarlo","doi":"10.1667/RADE-23-00207.1","DOIUrl":"10.1667/RADE-23-00207.1","url":null,"abstract":"<p><p>Developing and maintaining a robust and diverse scientific workforce is crucial to advance knowledge, drive innovation, and tackle societal issues that impact the economy and human health. The shortage of trained professionals in radiation and nuclear sciences derives from many factors, such as scarcity of specialized coursework, programming, professional development, and experiential learning at educational institutions, which significantly disrupt the training pipeline. Other challenges include small numbers of faculty and educators with specialized radiation/nuclear expertise that are continually overextended professionally and scientifically, with the burden of training falling on this subset of individuals. Even more alarming is the recent loss of radiobiologists due to increased retirements and deaths, leaving the radiobiology community with a void of mentors and knowledge. Lastly, inconsistency in acquiring stable grant funding to recruit and retain scientists is a major hurdle to training the next generation of radiation and nuclear scientists. Recommendations from the scientific community and the National Academies of Sciences, Engineering, and Medicine describe the need to bolster educational resources and provide more hands-on training experiences. Of equal importance was the suggestion that funding agencies provide more opportunities for training and tracking the radiation workforce. The Radiation and Nuclear Countermeasures Program (RNCP), and the Office of Research Training and Special Programs (ORTSP), both within the National Institute of Allergy and Infectious Diseases (NIAID) are committed to helping to develop and sustain the radiation research workforce. This commentary illustrates the importance of addressing radiation workforce development and outlines steps that the RNCP is taking to help mitigate the issue. In addition, the role for Diversity, Equity, Inclusion, and Accessibility (DEIA) in helping to increase the number of students trained in the radiation sciences is discussed, and the NIH's DEIA priorities and RNCP efforts to improve DEIA in the research community are highlighted. One of the main goals of this commentary is to provide awareness of available educational (i.e., development of a radiation biologist eBook) and funding resources. A summary of available awards targeting early- to mid-stage investigators and diversity candidates is given, and it is hoped that this list, although not exhaustive and not specific for all focus areas in radiation (e.g., cancer research), will encourage more radiation biologists to explore and apply to these under-utilized opportunities.</p>","PeriodicalId":20903,"journal":{"name":"Radiation research","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11060511/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139723859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信