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https://www.readbyqxmd.com/read/29330745/-treatment-of-rotational-malalignment-of-the-lower-leg
#1
REVIEW
P Keppler
BACKGROUND: Rotational malalignment after intramedullary nailing of tibial shaft fractures is not uncommon. In-toeing and out-toeing conditions in children are often the reason for orthopedic and traumatological medical consultation. OBJECTIVE: Evaluation of diagnostic modalities and therapeutic options for rotational malalignment in relationship to the patient's age. Surgical indications and efficacy of specific surgical techniques. MATERIAL AND METHODS: Systematic literature search in the German Institute for Medical Documentation and Information (DIMDI) and MEDLINE and evaluation of the currently published articles...
January 12, 2018: Der Unfallchirurg
https://www.readbyqxmd.com/read/29328718/charge-catastrophe-and-dielectric-breakdown-during-exposure-of-organic-thin-films-to-low-energy-electron-radiation
#2
A Thete, D Geelen, S J van der Molen, R M Tromp
The effects of exposure to ionizing radiation are central in many areas of science and technology, including medicine and biology. Absorption of UV and soft-x-ray photons releases photoelectrons, followed by a cascade of lower energy secondary electrons with energies down to 0 eV. While these low energy electrons give rise to most chemical and physical changes, their interactions with soft materials are not well studied or understood. Here, we use a low energy electron microscope to expose thin organic resist films to electrons in the range 0-50 eV, and to analyze the energy distribution of electrons returned to the vacuum...
December 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29321089/silencing-of-e3-ubiquitin-ligase-rnf8-enhances-ionizing-radiation-sensitivity-of-5-medulloblastoma-cells-by-promoting-the-deubiquitination-of-pcna
#3
Fei Li, Bin Liu, Xiaolan Zhou, Quan Xu
DNA damage response induced by ionizing radiation (IR) is an important event that involved in the sensitivity and efficiency of radiotherapy in human medulloblastoma. RNF8 is a E3 ubiquitin ligase and has key roles in the process of DNA damage and repair. Our study aimed to evaluate the effect of RNF8 in the DNA damage repair induced by IR exposure in medulloblastoma cells. We found that the levels of RNF8 were significantly up-regulated by γ-ray irradiation in a dose-dependent manner in medulloblastoma cells, and colocalized with γ-H2AX, a sensitive marker of DNA double strand break induced by γ-ray radiation...
January 10, 2018: Oncology Research
https://www.readbyqxmd.com/read/29320574/acceleration-of-small-bowel-motility-after-oral-administration-of-dai-kenchu-to-tj-100-assessed-by-cine-magnetic-resonance-imaging
#4
Akitoshi Inoue, Akira Furukawa, Hiroshi Yamamoto, Shinichi Ohta, Nguyen Dai Hung Linh, Tulyeubai Syerikjan, Sachiko Kaida, Tsuyoshi Yamaguchi, Satoshi Murata, Toru Obata, Masaji Tani, Kiyoshi Murata
Dai-kenchu-to (TJ-100) is an herbal medicine used to shorten the duration of intestinal transit by accelerating intestinal movement. However, intestinal movement in itself has not been evaluated in healthy volunteers using radiography, fluoroscopy, and radioisotopes because of exposure to ionizing radiation. The purpose of this study was to evaluate the effect of TJ-100 on intestinal motility using cinematic magnetic resonance imaging (cine MRI) with a steady-state free precession sequence. Ten healthy male volunteers received 5 g of either TJ-100 or lactose without disclosure of the identity of the substance...
2018: PloS One
https://www.readbyqxmd.com/read/29319336/operator-safety-during-the-acquisition-of-intraoral-images-with-a-handheld-and-portable-x-ray-device
#5
Dennis Rottke, Lisa Gohlke, Robert Schrödel, Stefan Hassfeld, Dirk Schulze
OBJECTIVES: The present study aims at investigating different radiation protection issues and dose values while acquiring intraoral images with a handheld X-ray device. METHODS: An Aribex NOMAD Pro 2TM, a RANDO® male head phantom, a consistency testing body (CTB), a PTW NOMEX® Multimeter, and a PTW Farmer® Ionization Chamber Type 30010 were used to investigate: (1) dose area products (DAP); (2) the expansion of the control area (CA); (3) the scattering pattern; and (4) the potential risk for operators of the X-ray device...
January 10, 2018: Dento Maxillo Facial Radiology
https://www.readbyqxmd.com/read/29318449/reduction-oxidation-redox-system-in-radiation-induced-normal-tissue-injury-molecular-mechanisms-and-implications-in-radiation-therapeutics
#6
REVIEW
R Yahyapour, E Motevaseli, A Rezaeyan, H Abdollahi, B Farhood, M Cheki, S Rezapoor, D Shabeeb, A E Musa, M Najafi, V Villa
Every year, millions of cancer patients undergo radiation therapy for treating and destroying abnormal cell growths within normal cell environmental conditions. Thus, ionizing radiation can have positive therapeutic effects on cancer cells as well as post-detrimental effects on surrounding normal tissues. Previous studies in the past years have proposed that the reduction and oxidation metabolism in cells changes in response to ionizing radiation and has a key role in radiation toxicity to normal tissue. Free radicals generated from ionizing radiation result in upregulation of cyclooxygenases (COXs), nitric oxide synthase (NOSs), lipoxygenases (LOXs) as well as nicotinamide adenine dinucleotide phosphate oxidase (NADPH oxidase), and their effected changes in mitochondrial functions are markedly noticeable...
January 9, 2018: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/29313167/prenatal-exposure-to-chernobyl-fallout-in-norway-neurological-and-developmental-outcomes-in-a-25-year-follow-up
#7
Rolv Terje Lie, Dag Moster, Per Strand, Allen James Wilcox
Ionizing radiation at high doses early in life may cause neurodevelopmental problems. Possible effects of lower doses are, however, controversial. We use carefully collected exposure data for Norway following the Chernobyl accident in April 1986 combined with population-based registries to assess long-term effects of fetal exposure on neurodevelopmental outcomes. Radiation doses were estimated for each Norwegian municipality for each calendar month from May 1986 to April 1989. We established a cohort of all Norwegian pregnancies during the three-year period of radiation measurement and compared them with appropriate unexposed groups...
January 8, 2018: European Journal of Epidemiology
https://www.readbyqxmd.com/read/29307045/a-comparison-of-cell-survival-and-heat-shock-protein-expression-after-radiation-in-normal-dermal-fibroblasts-microvascular-endothelial-cells-and-different-head-and-neck-squamous-carcinoma-cell-lines
#8
Dominique Muschter, Fabian Geyer, Richard Bauer, Tobias Ettl, Stephan Schreml, Frank Haubner
OBJECTIVES: Head and neck squamous cell carcinoma (HNSCC) shows increased radioresistance due to the manipulation of homeostatic mechanisms like the heat shock response. This study intended to comparatively analyze effects of ionizing radiation on different HNSCC cell lines (PCI) and normal human dermal fibroblasts (NHFs) and human dermal microvascular endothelial cells (HDMECs) to uncover differences in radiation coping strategies. MATERIALS AND METHODS: Proliferation (BrdU assay), apoptosis (caspase 3/7) and intracellular protein expression of heat shock protein (HSP)-70, and phosphorylated and total HSP27, determined by enzyme-linked immunosorbent assay (ELISA), were analyzed after exposure to increasing doses of ionizing radiation (2, 6, and 12 Gray, Gy)...
January 6, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29306237/pediatric-emergency-care-applied-research-network-head-injuryprediction-rules-on-the-basis-of-cost-and-effectiveness
#9
Fatma Dilek Gökharman, Sonay Aydın, Erdem Fatihoğlu, Pınar Nercis Koşar
Background/aim: Head injuries are commonly seen in the pediatric population. Noncontrast enhanced cranial CT is the method of choice to detect possible traumatic brain injury (TBI). Concerns about ionizing radiation exposure make the evaluation more challenging. The aim of this study was to evaluate the effectiveness of the Pediatric Emergency Care Applied Research Network (PECARN) rules in predicting clinically important TBI and to determine the amount of medical resource waste and unnecessary radiation exposure...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29304043/the-spectrosome-of-occupational-health-problems
#10
Delphine Bosson-Rieutort, Régis de Gaudemaris, Dominique J Bicout
Given the increased prevalence of cancer, respiratory diseases, and reproductive disorders, for which multifactorial origins are strongly suspected, the impact of the environment on the population represents a substantial public health challenge. Surveillance systems have become an essential public health decision-making tool. Networks have been constructed to facilitate the development of analyses of the multifactorial aspects of the relationships between occupational contexts and health. The aim of this study is to develop and present an approach for the optimal exploitation of observational databases to describe and improve the understanding of the (occupational) environment-health relationships, taking into account key multifactorial aspects...
2018: PloS One
https://www.readbyqxmd.com/read/29301929/reply-dna-repair-following-exposure-to-ionizing-radiation-is-not-error-free-but-this-does-not-increase-cancer-incidence-or-mortality
#11
Jeffry A Siegel, Bill Sacks, Charles W Pennington, James S Welsh
No abstract text is available yet for this article.
January 4, 2018: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29300360/the-effect-of-protracted-exposure-to-radiation-on-liver-injury-a-cohort-study-of-industrial-radiographers-in-xinjiang-china
#12
Qing Sun, Weiming Mao, Haiyue Jiang, Xiaoyue Zhang, Jing Xiao, Yulong Lian
BACKGROUND: At present, a large number of studies indicate that high dose ionizing radiation exposure is an important risk factor for liver damage. Whether protracted exposure to low external doses of ionizing radiation could induce liver injury is unclear. The aim of this study was to assess the risk of liver injury following protracted exposure to occupational radiation compared to a group of unexposed workers. METHODS: A three-year cohort study was initiated in Xinjiang, China in 2010 and included 508 industrial radiographers and 2156 unexposed workers...
January 4, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29298516/rhodiola-crenulata-attenuates-%C3%AE-ray-induced-cellular-injury-via-modulation-of-oxidative-stress-in-human-skin-cells
#13
Kuen-Tze Lin, Tsu-Chung Chang, Feng-Yi Lai, Chun-Shu Lin, Hsing-Lung Chao, Shih-Yu Lee
Skin injury is a major complication during radiation therapy and is associated with oxidative damage to skin cells. An effective and safe radioprotectant to prevent this skin damage is still unavailable. The Rhodiola crenulata root extract (RCE) has been reported to be a free radical scavenger and a potent anti-oxidant in both in vitro and in vivo models. In the current study, we investigated the effects of RCE on ionizing radiation-induced skin injury and its underlying mechanisms. HaCaT cells - a non-cancerous skin cell line together with HepG2, Caco2, A549, and OECM cancer cell lines - were pre-treated with RCE for 24[Formula: see text]h followed by exposure to 15 Gy using Caesium-137 as a γ-ray source...
January 3, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29297816/effects-of-a-light-emitting-diode-on-the-production-of-cholecalciferol-and-associated-blood-parameters-in-the-bearded-dragon-pogona-vitticeps
#14
Lara Cusack, Sam Rivera, Brad Lock, Daniel Benboe, David Brothers, Stephen Divers
The importance of vitamin D3 has been documented in multiple reptile species, with deficiencies resulting in alterations in calcium homeostasis, including nutritional secondary hyperparathyroidism. Though vitamin D3 can be obtained directly from dietary sources or from photobiosynthetic production, species variability in diet and behavior makes exposure to ultraviolet B (UVB) radiation an essential requirement for some diurnal species. The effect of different bulbs to promote synthesis of cholecalciferol (vitamin D3) in the bearded dragon ( Pogona vitticeps) was evaluated...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29296039/modulation-of-radiation-induced-base-excision-repair-pathway-gene-expression-by-melatonin
#15
Saeed Rezapoor, Alireza Shirazi, Sakineh Abbasi, Javad Tavakkoly Bazzaz, Pantea Izadi, Hamed Rezaeejam, Majid Valizadeh, Farid Soleimani-Mohammadi, Masoud Najafi
Objective: Approximately 70% of all cancer patients receive radiotherapy. Although radiotherapy is effective in killing cancer cells, it has adverse effects on normal cells as well. Melatonin (MLT) as a potent antioxidant and anti-inflammatory agent has been proposed to stimulate DNA repair capacity. We investigated the capability of MLT in the modification of radiation-induced DNA damage in rat peripheral blood cells. Materials and Methods: In this experimental study, male rats (n = 162) were divided into 27 groups (n = 6 in each group) including: irradiation only, vehicle only, vehicle with irradiation, 100 mg/kg MLT alone, 100 mg/kg MLT plus irradiation in 3 different time points, and control...
October 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/29288791/chromatin-modifications-of-htert-gene-in-htert-immortalized-human-mesenchymal-stem-cells-upon-exposure-to-radiation
#16
Nedime Serakinci, Pınar Mega Tiber, Oya Orun
Regulation of telomerase activity is thought to participate in the cellular response to ionizing radiation. Epigenetic mechanisms play a role in this regulation, as well as other mechanisms such as transcription, phosphorylation, etc. Here, we investigated chromatin modifications in telomerase promoter upon exposure to ionizing radiation in human mesenchymal stem cells (hMSC) and telomerase-immortalized hMSCs (hMSC-telo1) together with a hMSC-telo1 cell line in which TRF2 expression was partially repressed (siTRF2 hMSC-telo1)...
December 27, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29288597/fractionation-enhances-acute-oligodendrocyte-progenitor-cell-radiation-sensitivity-and-leads-to-long-term-depletion
#17
Sage Begolly, John A Olschowka, Tanzy Love, Jacqueline P Williams, M Kerry O'Banion
Ionizing radiation (IR) is commonly used to treat central nervous system (CNS) cancers and metastases. While IR promotes remission, frequent side effects including impaired cognition and white matter loss occur following treatment. Fractionation is used to minimize these CNS late side effects, as it reduces IR effects in differentiated normal tissue, but not rapidly proliferating normal or tumor tissue. However, side effects occur even with the use of fractionated paradigms. Oligodendrocyte progenitor cells (OPCs) are a proliferative population within the CNS affected by radiation...
December 30, 2017: Glia
https://www.readbyqxmd.com/read/29286526/reserch-of-the-gene-polymorphism-tox3-loc643714-and-the-risk-of-breast-cancer-development-in-persons-exposed-to-ionizing-radiation-after-chornobyl-disaster
#18
S I Polinyk, L A Rybchenko, B T Klimyk
OBJECTIVE: The objective of this work was to identify and compare the polymorphism of the rs3803662 polymorphism of the TOX3/LOC643714 gene in breast cancer patients who have undergone ionizing radiation due to the Chornobyl accident and in patients without ionizing radiation (IR) in the history. MATERIALS AND METHODS: The determination of the rs3803662 polymorphism of the TOX3/LOC643714 gene was per formed by polymerase chain reaction (PCR) in 83 patients with breast cancer: 42 subjects who were exposed to ion izing radiation due to the Chornobyl accident, 41 people without ionizing radiation in history and 17 controls in Ukraine without cancer pathology...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29286522/pilot-study-of-parathyroid-glands-in-adult-and-pediatric-subjects-exposed-to-ionizing-radiation-after-the-chnpp-accident-methodology-of-parathyroid-diagnostic-ultrasound
#19
O V Kaminskyi, O V Kopylova, D Ye Afanasyev, O V Mazurenko, S Ya Berezovskyi
OBJECTIVE: Estimation of the parathyroid hyperplasia prevalence after the ChNPP accident in adults exposed to ion izing radiation and their descendants using the diagnostic ultrasound and its methodology elaboration. MATERIALS AND METHODS: The pilot prospective study of the prevalence of parathyroid hyperplasia among the Chornobyl Nuclear Power Plant (ChNPP) accident adult survivors (n=686) and their descendants (54 children) was performed using diagnostic ultrasound examination of thyroid and parathyroids...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
https://www.readbyqxmd.com/read/29286521/impact-of-chronic-blood-viral-infection-on-lymphocyte-telomere-length-in-chornobyl-clean-up-workers-in-a-remote-period-after-radiation-exposure
#20
I M Ilienko, O V Lyaskivska, O A Belayev, O Y Pleskach, V I Shinkarenko, D A Bazyka
OBJECTIVE: To assess whether telomere length in lymphocytes of Chornobyl clean up workers at a late period 30 years after the exposure to ionizing radiation is influenced by a chronic blood viral infection and to determine role of viral carriage in cellular senescence. PATIENTS AND METHODS: Study group included 70 Chornobyl cleanup male workers 30 years after exposure {doses of external exposure (602.67 ± 114.19) mSv (M ± m); age (59.75 ± 0.82) yrs}. Relative telomere length (RTL) was analysed by fluorescence in situ hybridization and flow cytometry, immune cell subsets by standard combinations of monoclonal antibodies (CD45/14, CD3/19, CD4/8, CD3/HLADR, CD3/16/56, TCRγδ) and flow cytometry; antiviral immunity was performed determining the chronic phase antibodies to viruses: Hepatitis C (HCV), Cytomegalovirus (CMV), Toxoplasma gondii (TOX), Herpes simplex (HSV) and Epstein Barr virus (EBV VCA IgG and EBV NA IgG)...
December 2017: Problemy Radiat︠s︡iĭnoï Medyt︠s︡yny Ta Radiobiolohiï
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