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Radiation exposure

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https://www.readbyqxmd.com/read/28641207/ros-and-calcium-signaling-mediated-pathways-involved-in-stress-responses-of-the-marine-microalgae-dunaliella-salina-to-enhanced-uv-b-radiation
#1
Xinxin Zhang, Xuexi Tang, Ming Wang, Wei Zhang, Bin Zhou, You Wang
UV-B ray has been addressed to trigger common metabolic responses on marine microalgae, however, the upstream events responsible for these changes in marine microalgae are poorly understood. In the present study, a species of marine green microalgae Dunaliella salina was exposed to a series of enhanced UV-B radiation ranging from 0.25 to 1.00 KJ·m(-2) per day. The role of ROS and calcium signaling in the D. salina responses to UV-B was discussed. Results showed that enhanced UV-B radiation markedly decreased the cell density in a dose-dependent manner, but the contents of protein and glycerol that were essential for cell growth increased...
May 28, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28636807/targeting-protein-for-xenopus-kinesin-like-protein-2-knockdown-enhances-radiation-sensitivity-of-human-lung-squamous-carcinoma-cell
#2
Jie Yang, Feng Gao, Xinjian Xu, Yuxiang Wang, Shuchai Zhu
Targeting protein for Xenopus kinesin-like protein 2 (TPX2) has been demonstrated to be associated with the tumorigenesis of many cancers. In the present study, we investigated the role and preliminary mechanism of TPX2 in the resistance of lung squamous carcinoma to radiation therapy. The results showed that SK-MES-1R and NCI-H226R cells were more resistant to X-ray irradiation than the parental cells (SK-MES-1 and NCI-H226). Moreover, TPX2 was upregulated in the radioresistant cells compared with the parental cells...
June 21, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28636511/feasibility-of-low-dose-coronary-computed-tomographic-angiography-used-in-atrial-fibrillation-patients
#3
Chenglin Zhao, Mengxi Jiang, Jianxin Liu, Li Gao, Xiaoying Wang
OBJECTIVE: The diagnosis of coronary artery disease (CAD) in atrial fibrillation (AF) patients using coronary computed tomography angiography (CCTA) requires a large exposure dosage or repeated examinations. This study evaluates the feasibility of using low-dose CCTA in the double prospectively ECG-triggered high-pitch spiral acquisition mode (Double Flash Spiral mode). METHODS: Twenty-eight AF patients with suspected CAD were recruited. Double Flash Spiral mode (tube voltage 100 kVp) and iterative reconstruction was used for CCTA examination...
March 21, 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28635084/primary-tumor-sites-in-relation-to-ultraviolet-radiation-exposure-and-skin-visibility-correlate-with-survival-in-cutaneous-melanoma
#4
Daniela Gordon, Johan Hansson, Sandra Eloranta, Max Gordon, Peter Gillgren, Karin E Smedby
The prognostic value of detailed anatomic site and ultraviolet radiation (UVR) exposure patterns has not been fully determined in cutaneous melanoma. Thus, we reviewed medical records for detailed site in a population-based retrospective Swedish patient cohort diagnosed with primary invasive melanoma 1976 - 2003 (n=5,973). We followed the patients from date of diagnosis until death, emigration or December 31(st) 2013, and evaluated melanoma-specific survival by subsite in a multivariable regression model adjusting for established prognostic factors...
June 20, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28634669/yttrium-90-y-90-resin-microsphere-therapy-for-patients-with-unresectable-hepatocellular-carcinoma-a-single-center-experience
#5
Semra İnce, Bülent Karaman, Engin Alagoz, Nuri Karadurmuş, Hüseyin Şan, Cemal Nuri Erçin, Nuri Arslan
BACKGROUND/AIM: Selective intraarterial radionuclide therapy (SIRT) with yttrium-90 (Y-90) resin microspheres presently has successful results in primary or metastatic inoperable liver tumors. This procedure, which is also known as radioembolisation, delivers high doses of radiation selectively to hepatic tumors while minimum healthy liver exposure. The aim of this study was to present our clinical experience of radiomicrosphere therapy for the treatment of patients with unresectable hepatocellular carcinoma (HCC)...
June 20, 2017: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/28633754/total-body-skin-examination-adherence-among-young-adults-with-an-increased-risk-for-skin-cancer
#6
Julie Williams Merten, Jessica L King, Erin Largo-Wight
Although ultraviolent radiation exposure and skin cancer rates are rising in the US, there is not a consistent national message calling for routine total body skin examinations (TBSE) by a healthcare provider. This pilot study examined TBSE rates among adults at an increased risk for skin cancer (history of sunburn, indoor tanning use, excessive UV exposure, poor sunscreen use). Overall skin cancer prevention behaviors were insufficient among respondents (n=953) and only a quarter of respondents considered at an increased risk for skin cancer reported a TBSE...
June 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28633184/peritoneal-dialysis-catheter-position-evaluated-by-ultrasound-can-it-replace-abdomen-x-ray-in-patients-presenting-catheter-misplacement
#7
Matthias Zeiler, Luca Zanoli, Rosalia Viviana Scarfia, Stefano Santarelli, Antonio Granata
Background Malfunction of the peritoneal dialysis catheter is frequently caused by dislocation. The diagnostic approach is classically based on abdomen X-ray together with detailed case history and physical examination. Despite being rarely applied in clinical practice to evaluate catheter misplacement, ultrasound is a noninvasive, radiation-free technique that is potentially useful also to explore reasons for catheter malfunction. Consequently, we aimed to evaluate the diagnostic accuracy of ultrasound to identify peritoneal catheter misplacement...
June 20, 2017: Ultraschall in der Medizin
https://www.readbyqxmd.com/read/28632797/approach-to-management-of-giant-basal-cell-carcinomas
#8
Sarah E Mott, William J Hunter, Edibaldo Silva, Christopher J Huerter
Basal cell carcinoma (BCC) is a common nonmelanoma skin cancer with increasing incidence in the United States and worldwide. It is strongly linked to UV radiation exposure and typically is slow growing. Malignancy in BCCs is due to local growth and invasion rather than metastasis, and the prognosis is generally favorable. We report the case of a 60-year-old man with a large, locally destructive giant BCC on the right side of the upper back that was successfully treated via complete surgical excision (SE) and did not recur in the subsequent 36 months...
May 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28632729/radiation-associated-breast-cancer-and-gonadal-hormone-exposure-a-report-from-the-childhood-cancer-survivor-study
#9
Chaya S Moskowitz, Joanne F Chou, Charles A Sklar, Dana Barnea, Cécile M Ronckers, Danielle Novetsky Friedman, Joseph P Neglia, Lucie Turcotte, Rebecca M Howell, Tara O Henderson, Gregory T Armstrong, Wendy M Leisenring, Leslie L Robison, Flora E van Leeuwen, Malcolm C Pike, Kevin C Oeffinger
BACKGROUND: The relationship between hormone exposure and breast cancer risk in women treated with chest radiotherapy for childhood cancer is uncertain. METHODS: Participants included 1108 females from the Childhood Cancer Survivor Study who were diagnosed with childhood cancer 1970-1986, treated with chest radiotherapy, and survived to ages ⩾20 years. Hazard ratios (HRs) and 95% confidence intervals (CIs) from Cox models adjusted for chest radiation field, delivered dose, anthracycline exposure, and age at childhood cancer estimated risk...
June 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28632654/an-overview-of-cardiac-computed-tomography-in-adults-with-congenital-heart-disease
#10
Pal Suranyi, Akos Varga-Szemes, Anthony M Hlavacek
Familiarity with congenital heart disease (CHD) and its manifestations in adults is becoming increasingly important for the practicing cardiothoracic imager. The use of computed tomographic angiography is becoming commonplace not only in adults with a history and subsequent interventions for CHD as a child but also in de novo detection of-typically-milder, survivable forms of CHD, which are clinically suspected because of declining cardiac performance, cardiac events, or murmurs. Occasionally, adult CHD (ACHD) is found incidentally on scans performed for other indications (eg, trauma or neoplasm staging) because of improvements in computed tomographic technology and advanced visualization...
July 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28632552/comparative-study-of-c-arms-for-intraoperative-3-dimensional-imaging-and-navigation-in-minimally-invasive-spine-surgery-part-ii-radiation-exposure
#11
Jan-Helge Klingler, Ronen Sircar, Christian Scheiwe, Evangelos Kogias, Marie T Krüger, Christoph Scholz, Ulrich Hubbe
STUDY DESIGN: A radiation exposure study in vitro. OBJECTIVE: This study aimed to compare the radiation exposure of 2 different 3-dimensional (3D) C-arm devices on an anthropomorphic phantom. SUMMARY OF BACKGROUND DATA: Minimally invasive pedicle screw placement requires intraoperative imaging techniques for visualization of the unexposed spine. Mobile 3D C-arms compose a 3D image data set out of multiple successive fluoroscopic images. METHODS: We compared the 3D C-arm devices Siremobil Iso-C 3D (Siemens Sector Healthcare, Erlangen, Germany) and Vision FD Vario 3D (Ziehm Imaging, Nuremberg, Germany) regarding their radiation exposure...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28632432/serum-micrornas-as-early-indicators-for-estimation-of-exposure-degree-in-response-to-ionizing-irradiation
#12
Wenjun Wei, Jinpeng He, Jufang Wang, Nan Ding, Bing Wang, Sulan Lin, Xurui Zhang, Junrui Hua, He Li, Burong Hu
Exposure to ionizing radiation from nuclear devices, spaceflights or terrorist attacks represents a major threat to human health and public security. After a radiological incident, noninvasive biomarkers that can facilitate rapid assessment of exposure risk in the early stages are urgently needed for optimal medical treatment. Serum microRNAs (miRNAs) are ideal biomarkers because they are stable in response to environmental changes, they are common among different species and are easily collected. Here, we performed miRNA PCR arrays to analyze miRNA expression profiles at 24 h postirradiation...
June 20, 2017: Radiation Research
https://www.readbyqxmd.com/read/28632195/towards-a-long-term-strategy-for-voluntary-based-internal-radiation-contamination-monitoring-representativeness-of-the-monitoring-results-in-fukushima-japan
#13
Shuhei Nomura, Masaharu Tsubokura, Michio Murakami, Kyoko Ono, Yoshitaka Nishikawa, Tomoyoshi Oikawa
Following Japan's 2011 Fukushima nuclear incident, voluntary participation, rather than mandatory, was adopted as the default scenario for individual radiation monitoring. We evaluated the representativeness of the internal monitoring results from voluntary participants in Minamisoma City, which is located 10-40 km from the Fukushima nuclear plant. Of approximately 70,000 individuals who were residing in Minamisoma City before the incident, a total of 19,263 residents (aged ≥21 years) participated in the monitoring from 1 October 2011 to 31 March 2015...
June 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28632030/ultraviolet-b-radiation-stimulates-the-interaction-between-nuclear-factor-of-activated-t-cells-5-nfat5-and-nuclear-factor-kappa-b-nf-%C3%AE%C2%BAb-in-human-lens-epithelial-cells
#14
Inyoung Chung, Young-Sool Hah, SunMi Ju, Ji-Hye Kim, Woong-Sun Yoo, Hee-Young Cho, Ji-Myong Yoo, Seong-Wook Seo, Wan-Sung Choi, Seong-Jae Kim
PURPOSE: Nuclear factor-kappa B (NF-κB) has been proposed as a therapeutic target for the treatment of cataracts. The authors investigated the relationship between nuclear factor of activated T cells 5 (NFAT5) and NF-κB in ultraviolet B (UVB)-irradiated human lens epithelial (HLE) cells. METHODS: Human lens epithelial B-3 (HLE-B3) cells were exposed to UVB light at a dose of 10 mJ/cm(2) and then incubated for 24 h. Cell viability was assessed by using the Cell Counting Kit-8 (CCK-8) assay...
February 26, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28631848/impact-of-solar-ultraviolet-radiation-on-atopic-dermatitis-symptoms-in-young-children-a-longitudinal-study
#15
Young-Min Kim, Jihyun Kim, Ji Young Lee, Minji Kim, Hyunmi Kim, Kwon Jung, Soomi Eo, Mijin Ahn, Kangmo Ahn
BACKGROUND: There are controversial data about the effects of sun exposure on atopic dermatitis (AD). We evaluated the association between solar ultraviolet radiation (UVR) exposure and AD symptoms in children. METHODS: Eighty two children under 6 years (48 boys and 34 girls) with AD living in Seoul, Korea were enrolled and followed for 12 months between September 2013 and August 2014. Daily symptoms were recorded to describe the degree of itching, sleep disturbance, erythema, dryness, oozing and edema...
June 20, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28630876/a-dosimetric-comparison-of-dose-escalation-with-simultaneous-integrated-boost-for-locally-advanced-non-small-cell-lung-cancer
#16
Wenjuan Yang, Biao Zeng, Yanfang Qiu, Jianfeng Tan, Shilei Xu, Yilong Cai, Yujuan Zhou, Zhigang Liu, Junming Luo, Hui Wang
BACKGROUND: Many studies have demonstrated that a higher radiotherapy dose is associated with improved outcomes in non-small-cell lung cancer (NSCLC). We performed a dosimetric planning study to assess the dosimetric feasibility of intensity-modulated radiation therapy (IMRT) with a simultaneous integrated boost (SIB) in locally advanced NSCLC. METHODS: We enrolled twenty patients. Five different dose plans were generated for each patient. All plans were prescribed a dose of 60 Gy to the planning tumor volume (PTV)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28628668/dose-dependent-effects-of-gamma-radiation-on-the-early-zebrafish-development-and-gene-expression
#17
Selma Hurem, Leonardo Martín Martín, Dag Anders Brede, Eystein Skjerve, Rasoul Nourizadeh-Lillabadi, Ole Christian Lind, Terje Christensen, Vidar Berg, Hans-Christian Teien, Brit Salbu, Deborah Helen Oughton, Peter Aleström, Jan Ludvig Lyche
Ionizing radiation from natural sources or anthropogenic activity has the potential to cause oxidative stress or genetic damage in living organisms, through the ionization and excitation of molecules and the subsequent production of free radicals and reactive oxygen species (ROS). The present work focuses on radiation-induced biological effects using the zebrafish (Danio rerio) vertebrate model. Changes in developmental traits and gene expression in zebrafish were assessed after continuous external gamma irradiation (0...
2017: PloS One
https://www.readbyqxmd.com/read/28628487/do-toddler-s-fractures-of-the-tibia-require-evaluation-and-management-by-an-orthopaedic-surgeon-routinely
#18
John S Adamich, Mark W Camp
OBJECTIVE: The majority of uncomplicated toddler fractures of the tibia (toddler's fractures) do not need an orthopaedic surgeon's intervention or follow-up. However, inexperienced emergency room physicians, general practitioners and orthopaedic trainees and surgeons understandably defer to a cautious approach of referral and subsequent frequent clinical and radiographic follow-up. An evidence-based pathway can help prevent this overtreatment, reduce unnecessary radiation exposure and decrease the financial burden on families and the healthcare system...
June 16, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28627265/atm-radiation-and-the-risk-of-second-primary-breast-cancer
#19
Jonine L Bernstein, Patrick Concannon
PURPOSE: It was first suggested more than 40 years ago that heterozygous carriers for the human autosomal recessive disorder Ataxia-Telangiectasia (A-T) might also be at increased risk for cancer. Subsequent studies have identified the responsible gene, Ataxia-Telangiectasia Mutated (ATM), characterized genetic variation at this locus in A-T and a variety of different cancers, and described the functions of the ATM protein with respect to cellular DNA damage responses. However, an overall model of how ATM contributes to cancer risk, and in particular, the role of DNA damage in this process, remains lacking...
June 19, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28625692/implementation-of-clinical-effectiveness-guidelines-for-solid-organ-injury-after-trauma-10-year-experience-at-a-level-1-pediatric-trauma-center
#20
Christine M Leeper, Isam Nasr, Abigail Koff, Christine McKenna, Barbara A Gaines
BACKGROUND: Diagnostic imaging of pediatric blunt abdominal trauma is evolving in light of increased attention to radiation exposure. We hypothesize that the implementation of imaging guidelines has reduced total CT scans without missing clinically significant injury. METHODS: We retrospectively reviewed blunt trauma patients age 0-17 with solid organ injury who underwent CT scan at our academic level 1 pediatric trauma center between 2005 and 2014. Variables including total annual trauma admissions and CT scans, demographics, injury characteristics, and procedures were recorded...
June 6, 2017: Journal of Pediatric Surgery
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