Fractionated irradiation can induce functionally relevant multidrug resistance gene and protein expression in human tumor cell lines.

abstract：:Proton exposure induces mutations and cancer, which are presumably linked. Because protons are abundant in the space environment and significant uncertainties exist for the effects of space travel on human health, the purpose of this study was to identify the types of mutations induced by exposure of mammalian cells t...

journal_title：Radiation research

authors： Turker MS,Grygoryev D,Dan C,Eckelmann B,Lasarev M,Gauny S,Kwoh E,Kronenberg A

更新日期：2013-05-01 00:00:00

abstract：:The mechanisms underlying hepatocellular damage after irradiation are obscure. We identified genes induced by radiation in isolated rat hepatocytes in vitro by cDNA array gene expression analysis and then screened in vivo experiments with those same genes using real-time PCR and Western blotting. Hepatocytes were irra...

journal_title：Radiation research

authors： Christiansen H,Batusic D,Saile B,Hermann RM,Dudas J,Rave-Frank M,Hess CF,Schmidberger H,Ramadori G

更新日期：2006-03-01 00:00:00

abstract：:Fractionated whole-brain irradiation (fWBI) is a mainstay of treatment for patients with intracranial neoplasia; however late-delayed radiation-induced normal tissue injury remains a major adverse consequence of treatment, with deleterious effects on quality of life for affected patients. We hypothesize that cerebrova...

journal_title：Radiation research

authors： Andrews RN,Metheny-Barlow LJ,Peiffer AM,Hanbury DB,Tooze JA,Bourland JD,Hampson RE,Deadwyler SA,Cline JM

更新日期：2017-05-01 00:00:00

abstract：:Numerous experimental and clinical studies have been completed regarding the effects of carbogen and nicotinamide on tumor oxygenation and radiosensitivity. The current study incorporates three physiological measurement techniques to further define spatial variations in oxygen availability and development of hypoxia a...

journal_title：Radiation research

authors： Fenton BM,Lord EM,Paoni SF

更新日期：2000-01-01 00:00:00

abstract：:While nontargeted and low-dose effects such as the bystander effect are now accepted, the mechanisms underlying the response have yet to be elucidated. It has been shown that the transfer of irradiated cell conditioned medium (ICCM) can kill cells that are not directly irradiated; however, to date the effect of ICCM c...

journal_title：Radiation research

authors： Ryan LA,Smith RW,Seymour CB,Mothersill CE

更新日期：2008-02-01 00:00:00

abstract：:The non-random distribution of DNA breakage in PFGE (pulsed-field gel electrophoresis) experiments poses a problem of proper subtraction of the background DNA damage to obtain a fragment-size distribution due to radiation only. A naive bin-to-bin subtraction of the background signal will not result in the right DNA ma...

journal_title：Radiation research

authors： Ponomarev AL,Belli M,Hahnfeldt PJ,Hlatky L,Sachs RK,Cucinotta FA

更新日期：2006-12-01 00:00:00

abstract：:We describe a rapid assay to predict intrinsic radiosensitivity of normal tissues based on the radiation-induced cytotoxic response of a number of types of white blood cells. Twenty-four hours after irradiation, leukocytes were prepared for analysis by flow cytometry. Radiation-induced cytotoxicity was characterized b...

journal_title：Radiation research

authors： Crompton NE,Ozsahin M

更新日期：1997-01-01 00:00:00

abstract：:Radiation-induced apoptosis in lymphocyte-derived cell lines is characterized by endonucleolytic cleavage of cellular DNA within hours after radiation exposure. We have studied this phenomenon qualitatively (DNA gel electrophoresis) and quantitatively (diphenylamine reagent assay) in murine EL4 T-lymphoma cells expose...

journal_title：Radiation research

authors： Palayoor ST,Macklis RM,Bump EA,Coleman CN

更新日期：1995-03-01 00:00:00

abstract：:Cellular and molecular repair was studied at 23 degrees C using split-dose recovery and alkaline elution techniques, respectively, as a function of cellular oxygen and nutrient conditions. Hypoxic cells (0.001% O2) in full medium showed a partial reduction in the level of sublethal damage (SLD) repair relative to aera...

journal_title：Radiation research

authors： Spiro IJ,Kennedy KA,Stickler R,Ling CC

更新日期：1985-01-01 00:00:00

abstract：:We show here that the arrests of cells in G2 phase of the cell cycle induced by either staurosporine or ionizing radiation are closely related phenomena governed by a common kinase signaling pathway. The protein kinase inhibitor staurosporine induces a complete G2-phase arrest in exponentially growing TK6 human lympho...

journal_title：Radiation research

authors： Crompton NE,Hain J,Jaussi R,Burkart W

更新日期：1993-09-01 00:00:00

abstract：:Human blood cultures were exposed to a 1.9 GHz continuous-wave (CW) radiofrequency (RF) field for 2 h using a series of six circularly polarized, cylindrical waveguides. Mean specific absorption rates (SARs) of 0.0, 0.1, 0.26, 0.92, 2.4 and 10 W/kg were achieved, and the temperature within the cultures during a 2-h ex...

journal_title：Radiation research

authors： McNamee JP,Bellier PV,Gajda GB,Miller SM,Lemay EP,Lavallée BF,Marro L,Thansandote A

更新日期：2002-10-01 00:00:00

abstract：:Three somatic mutation assays were evaluated in men exposed to low-dose, whole-body, ionizing radiation. Blood samples were obtained between 1992 and 1999 from 625 Russian Chernobyl cleanup workers and 182 Russian controls. The assays were chromosome translocations in lymphocytes detected by FISH, hypoxanthine phospho...

journal_title：Radiation research

authors： Jones IM,Galick H,Kato P,Langlois RG,Mendelsohn ML,Murphy GA,Pleshanov P,Ramsey MJ,Thomas CB,Tucker JD,Tureva L,Vorobtsova I,Nelson DO

更新日期：2002-10-01 00:00:00

abstract：:A method was used to detect chromosome inversions as apparent or false sister chromatid exchanges (SCEs) in the first mitosis after gamma irradiation of human G0 cells. Dose-response relationships for small inversions have not been measured and reported previously, but it has been assumed that these are induced with a...

journal_title：Radiation research

authors： Mühlmann-Díaz MC,Bedford JS

更新日期：1995-08-01 00:00:00

abstract：:Human immortalized keratinocytes were exposed to a range of single or fractionated doses of gamma rays from (60)Co, to medium harvested from donor cells exposed to these protocols, or to a combination of radiation and irradiated cell conditioned medium (ICCM). The surviving fractions after direct irradiation or exposu...

journal_title：Radiation research

authors： Mothersill C,Seymour CB

更新日期：2002-11-01 00:00:00

abstract：:Radiation exposure from a number of terrestrial sources is associated with an increased risk for atherosclerosis. Recently, concern over whether exposure to cosmic radiation might pose a similar risk for astronauts has increased. To address this question, we examined the effect of 2 to 5 Gy iron ions ((56)Fe), a parti...

journal_title：Radiation research

authors： Yu T,Parks BW,Yu S,Srivastava R,Gupta K,Wu X,Khaled S,Chang PY,Kabarowski JH,Kucik DF

更新日期：2011-06-01 00:00:00

abstract：:New Zealand rabbits, fasted for 12 hours, were subjected to 500 rads of whole-body irradiation. K+-palmitate-1-14C oxidation was assayed with the 600 X g supernatant of thymus and liver homogenates, in the presence of ATP, at various time intervals from irradiation. For a period of 24 hours following irradiation, oxid...

journal_title：Radiation research

authors： Miras CJ,Mantzos JD,Legakis NJ,Levis GM

更新日期：1968-11-01 00:00:00

abstract：:The study design and obtained results represent an intercomparison of various laboratories performing dose assessment using the dicentric chromosome analysis (DCA) as a diagnostic triage tool for individual radiation dose assessment. Homogenously X-irradiated (240 kVp, 1 Gy/min) blood samples for establishing calibrat...

journal_title：Radiation research

authors： Beinke C,Barnard S,Boulay-Greene H,De Amicis A,De Sanctis S,Herodin F,Jones A,Kulka U,Lista F,Lloyd D,Martigne P,Moquet J,Oestreicher U,Romm H,Rothkamm K,Valente M,Meineke V,Braselmann H,Abend M

更新日期：2013-08-01 00:00:00

abstract：:A biophysical model has been developed that is based on the assumptions that an interphase chromosome occupies a spherical territory and that chromosome exchanges are formed by the misrejoining of two DNA double-strand breaks induced within a defined interaction distance. The model is used to explain the relative freq...

journal_title：Radiation research

authors： Wu H

更新日期：2001-11-01 00:00:00

abstract：:The purpose of this study was to develop a rat orthotopic lung tumor model with a solitary intrapulmonary nodule to study the effects of high-dose radiation. A549-Luc non-small cell lung cancer (NSCLC) cells were implanted into nude rats in the intercostal space between ribs 5 and 6 of the right lung. Bioluminescence ...

journal_title：Radiation research

authors： Saha D,Watkins L,Yin Y,Thorpe P,Story MD,Song K,Raghavan P,Timmerman R,Chen B,Minna JD,Solberg TD

更新日期：2010-07-01 00:00:00

abstract：:Although conclusive evidence has been obtained for the presence of radiation-induced bystander effects, the mechanisms that trigger and regulate these processes are still largely unknown. The bystander effect may play a critical role in determining the biological effectiveness of low-dose exposures, but questions on h...

journal_title：Radiation research

authors： Schettino G,Folkard M,Michael BD,Prise KM

更新日期：2005-03-01 00:00:00

abstract：:The risk of a radiological or nuclear public health emergency is a major growing concern of the U.S. government. To address a potential incident and ensure that the government is prepared to respond to any subsequent civilian or military casualties, the U.S. Department of Health and Human Services and the Department o...

journal_title：Radiation research

authors： DiCarlo AL,Cassatt DR,Dowling WE,Esker JL,Hewitt JA,Selivanova O,Williams MS,Price PW

更新日期：2018-12-01 00:00:00

abstract：:Previous work showed that treatment of plateau-phase Chinese hamster ovary cells with the radiomimetic double-strand cleaving agent bleomycin induced very small deletions as well as interchromosomal reciprocal translocations, both of which could be ascribed to errors in end joining of DNA double-strand breaks. In an a...

journal_title：Radiation research

authors： Yu Y,Inamdar KV,Turner K,Jackson-Cook CK,Povirk LF

更新日期：2002-09-01 00:00:00

abstract：:As part of a long-term study of the effects of irradiation during development, prenatal and early neonatal mortality were evaluated for beagles exposed in utero at 8 days postcoitus (dpc), 28 dpc, 55 dpc, or 2 days postpartum. Mean doses used were 0,0.16, or 0.83 Gy. A decrease in whelping rates was observed for femal...

journal_title：Radiation research

authors： Angleton GM,Benjamin SA,Lee AC

更新日期：1988-07-01 00:00:00

abstract：:Breast tissue is very susceptible to radiation-induced carcinogenesis, and mammary stem/progenitor cells are potentially important targets of this. The mammary epithelium is maintained as two mostly independent lineages of luminal and basal cells. To elucidate their immediate radiation responses, we analyzed the mamma...

journal_title：Radiation research

authors： Kudo KI,Takabatake M,Nagata K,Nishimura Y,Daino K,Iizuka D,Nishimura M,Suzuki K,Kakinuma S,Imaoka T

更新日期：2020-07-08 00:00:00

abstract：:The present paper describes experiments conducted over the last several years which have focused primarily on the development of mammary tumors in BALB/c mice after neutron and gamma irradiation. Time-dose relationships for induction of mammary and lung tumors following irradiation with fission-spectrum neutrons and 1...

journal_title：Radiation research

authors： Ullrich RL

更新日期：1991-10-01 00:00:00

abstract：:The concept of curvature in dose-response relationships figures prominently in radiation biology, encompassing a wide range of interests including radiation protection, radiotherapy and fundamental models of radiation action. In this context, the ability to detect even small amounts of curvature becomes important. Sta...

journal_title：Radiation research

authors： Shuryak I,Loucas BD,Cornforth MN

更新日期：2017-01-01 00:00:00

abstract：:The threat of exposure to ionizing radiation from a nuclear reactor accident or deliberate terrorist actions is a significant public health concern. The lung is particularly susceptible to radiation-induced injury from external sources or inhalation of radioactive particles from radioactive fallout. Radiation-induced ...

journal_title：Radiation research

authors： Christofidou-Solomidou M,Pietrofesa RA,Arguiri E,Koumenis C,Segal R

更新日期：2017-11-01 00:00:00

abstract：:We studied the effects of extremely low-frequency (50 Hz) electromagnetic fields (EMFs) on peripheral human blood lymphocytes and DBY747 Saccharomyces cerevisiae. Graded exposure to 50 Hz magnetic flux density was obtained with a Helmholtz coil system set at 1, 10 or 100 microT for 18 h. The effects of EMFs on DNA dam...

journal_title：Radiation research

authors： Luceri C,De Filippo C,Giovannelli L,Blangiardo M,Cavalieri D,Aglietti F,Pampaloni M,Andreuccetti D,Pieri L,Bambi F,Biggeri A,Dolara P

更新日期：2005-09-01 00:00:00

abstract：:This review was initiated in response to concerns that ionizing radiation could be a cause of melanoma. Studies presenting the relative risks for melanoma after external ionizing radiation exposure were in seven categories: (1) The Canadian Radiation Dose Registry, (2) nuclear industry workers, (3) subjects near nucle...

journal_title：Radiation research

authors： Fink CA,Bates MN

更新日期：2005-11-01 00:00:00

abstract：:In this study, we sought to determine how diffusion-weighted imaging (DWI) and proton magnetic resonance spectroscopy (1H-MRS) features are associated with histopathological results, and explored the cellular mechanisms of DWI and 1H-MRS in early radiosensitivity of transplanted liver tumors. VX2 tumors were implanted...

journal_title：Radiation research

authors： Li Y,Lin D,Weng Y,Weng S,Yan C,Xu X,Chen J,Ye R,Hong J

更新日期：2019-01-01 00:00:00