On the question of RBE reversal at high doses.

abstract：:To study the acquired radioresistance of tumor cells, a model system of two cell lines, Djungarian hamster fibroblasts (DH-TK-) and their radioresistant progeny, was established. The progeny of irradiated cells were isolated by treating the parental cell monolayer with a single dose of 20 Gy (PIC-20). The genetic and ...

journal_title：Radiation research

authors： Tyrsina EG,Slanina SV,Kakpakova ES,Kalendo GS,Kan NG,Tyrsin OY,Ryskov AP

更新日期：2005-12-01 00:00:00

abstract：:We present measurements of low-energy (<18 eV) electron-stimulated desorption of anions from acetamide (CH(3)CONH(2)) and dimethyl disulfide [DMDS: (CH(3)S)(2)] films. Electron irradiation of physisorbed CH(3)CONH(2) produces H(-), CH(3)(-) and O(-) anions, whereas the H(-), CH(2)(-), CH(3)(-), S(-), SH(-) and SCH(3)(...

journal_title：Radiation research

authors： Abdoul-Carime H,Cecchini S,Sanche L

更新日期：2002-07-01 00:00:00

abstract：:Total-body irradiation (TBI) induces an increase in levels of granulocytes and cortisol in blood. To explore the underlying mechanisms, we studied 26 patients who had TBI prior to bone marrow transplantation. Our findings suggest that only a high dose of TBI (10 Gy) was capable of activating the hypothalamo-pituitary ...

journal_title：Radiation research

authors： Girinsky TA,Pallardy M,Comoy E,Benassi T,Roger R,Ganem G,Cosset JM,Socié G,Magdelenat H

更新日期：1994-09-01 00:00:00

abstract：:The exposure of peripheral blood mononuclear cells (PBMCs) was performed in a 10-T static magnetic field. Without lymphocyte stimulation, there were no significant differences in the viability of the exposed and unexposed CD4(+) T cells, CD8(+) T cells, B cells, and natural killer (NK) cells. The expression of Th1 typ...

journal_title：Radiation research

authors： Onodera H,Jin Z,Chida S,Suzuki Y,Tago H,Itoyama Y

更新日期：2003-06-01 00:00:00

abstract：:In boron neutron capture therapy, the absorbed dose from the (10)B(n,alpha)(7)Li reaction depends on the (10)B concentration and (10)B distribution in the irradiated volume. Thus compounds used in BNCT should have tumor-specific uptake and low accumulation in normal tissues. This study compares in a mouse model the (1...

journal_title：Radiation research

authors： Wittig A,Huiskamp R,Moss RL,Bet P,Kriegeskotte C,Scherag A,Hilken G,Sauerwein WA

更新日期：2009-10-01 00:00:00

abstract：:The molecular structure of mutants induced in human lymphoblast cells by 500 cGy X rays in the presence of the radioprotector cysteamine (25 mM) has been compared with that induced by an equally mutagenic treatment of 150 cGy X rays alone. Sets of mutants at the hypoxanthine-guanine phosphoribosyl transferase locus we...

journal_title：Radiation research

authors： Liber HL,Benforado K,Little JB

更新日期：1989-05-01 00:00:00

abstract：:There is evidence indicating that low-level exposures to low- LET radiation may inhibit the development of tumors, but the mechanism of this effect is virtually unknown. In the present study, BALB/c mice were irradiated with single doses of 0.1 or 0.2 Gy X rays and injected intravenously 2 h later with syngeneic L1 sa...

journal_title：Radiation research

authors： Cheda A,Wrembel-Wargocka J,Lisiak E,Nowosielska EM,Marciniak M,Janiak MK

更新日期：2004-03-01 00:00:00

abstract：:The natural survival, relative to properly chosen controls, of 26 beagle dogs injected once intravenously with an average of 0.58 +/- 0.04 kBq 239Pu/kg, 23 dogs injected with 2.31 +/- 0.43 kBq 226Ra/kg, 13 dogs injected with 1.84 +/- 0.26 kBq 228Ra/kg, 12 dogs injected with 0.56 +/- 0.030 kBq 228Th/kg, and 12 dogs inj...

journal_title：Radiation research

authors： Bruenger FW,Miller SC,Lloyd RD

更新日期：1991-06-01 00:00:00

abstract：:The recent demonstration of nanoscale scintillators has led to interest in the combination of radiation and photodynamic therapy. In this model, scintillating nanoparticles conjugated to photosensitizers and molecular targeting agents would enhance the targeting and improve the efficacy of radiotherapy and extend the ...

journal_title：Radiation research

authors： Morgan NY,Kramer-Marek G,Smith PD,Camphausen K,Capala J

更新日期：2009-02-01 00:00:00

abstract：:We have tested an 836.55 MHz field with North American Digital Cellular (NADC) modulation in a 2-year animal bioassay that included fetal exposure. In offspring of pregnant Fischer 344 rats, we tested both spontaneous tumorigenicity and the incidence of induced central nervous system (CNS) tumors after a single dose o...

journal_title：Radiation research

authors： Adey WR,Byus CV,Cain CD,Higgins RJ,Jones RA,Kean CJ,Kuster N,MacMurray A,Stagg RB,Zimmerman G,Phillips JL,Haggren W

更新日期：1999-09-01 00:00:00

abstract：:Ionizing radiations induce mutations which can be detected both in coding sequences (Hprt locus) by measuring the frequency of 6-thioguanine-resistant cells and in minisatellite sequences by DNA fingerprint analysis. We analyzed the effects of irradiation with low-energy protons (31 keV/pm) and, for comparison, with u...

journal_title：Radiation research

authors： Ogheri S,Bruna V,Cera F,Favaretto S,Cherubini R,Celotti L

更新日期：1997-09-01 00:00:00

abstract：:Changes in the free-cell population of the lungs of two strains of mice (SAS/4 and CBA/H) were studied up to 4 months after inhalation exposure to a sized fraction of 239PuO2 particles (1.5 micron AMAD) to give initial alveolar depositions (IADs) ranging from 17 to 810 Bq. A sample of the free-cell population of the l...

journal_title：Radiation research

authors： Moores SR,Talbot RJ,Evans N,Lambert BE

更新日期：1986-03-01 00:00:00

abstract：:In pathogen-free mice, but not standard conventionally housed laboratory rodents, two distinctly different modes of early radiation lethality can be identified by modifying the irradiation technique (total-body versus abdominal irradiation) or by therapeutic intervention such as rescue of total-body-irradiated mice wi...

journal_title：Radiation research

authors： Mason KA,Withers HR,McBride WH,Davis CA,Smathers JB

更新日期：1989-03-01 00:00:00

abstract：:This paper evaluates the global vitamin D effective UV (UV(vitd)) irradiances under cloudy conditions at a subtropical, southern hemisphere site. The UV(vitd) irradiances were analyzed on a horizontal plane and sampled at 5-min intervals over 18 months so that a wide range of parameters including cloud conditions, sol...

journal_title：Radiation research

authors： Turnbull DJ,Parisi AV,Schouten PW

更新日期：2010-05-01 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 cellular sites for damage in mammalian cells caused by 193-nm radiation from an argon fluoride excimer laser were investigated. The ability of Chinese hamster ovary cells to reduce a tetrazolium dye (MTT) was decreased to 37% of unirradiated control by 2.5 x 10(3) J/m2 of 193-nm radiation when measured either 4 or...

journal_title：Radiation research

authors： Kochevar IE,Walsh AA,Held KD,Gallo RL,Mirro J

更新日期：1990-05-01 00:00:00

abstract：:Using an electron storage ring as a source of radiation, the wavelength dependence of inactivation and membrane damage in yeast cells (Saccharomyces cerevisiae) was investigated in the range from 145 to 254 nm, with special reference to the effects of vacuum-uv radiation. The cells were irradiated on a Millipore filte...

journal_title：Radiation research

authors： Ito T,Ito A,Hieda K,Kobayashi K

更新日期：1983-12-01 00:00:00

abstract：:Eisenia fetida were exposed continuously to (60)Co gamma radiation during two generations (F(0) and F(1)). Adult F(0) reproduction capacity (i.e., number of cocoons produced, hatchability and number of F(1) hatchlings) in controls and at five dose rates (0.18, 1.7, 4, 11 and 43 mGy/h) was measured over a 13-week expos...

journal_title：Radiation research

authors： Hertel-Aas T,Oughton DH,Jaworska A,Bjerke H,Salbu B,Brunborg G

更新日期：2007-11-01 00:00:00

abstract：:Chemical and structural modifications in multilayer liposomes of synthetic phosphatidylcholine induced by gamma irradiation are investigated with different techniques. Fluorescence anisotropy of the DPH probe and differential scanning calorimetry reveal a broadening of the main lipid transition and the disappearance o...

journal_title：Radiation research

authors： Ianzini F,Guidoni L,Indovina PL,Viti V,Erriu G,Onnis S,Randaccio P

更新日期：1984-04-01 00:00:00

abstract：:Female rhesus monkeys received whole-body doses of ionizing radiation in the form of single-energy protons, mixed-energy protons, X rays, and electrons. Endometriosis developed in 53% of the monkeys during a 17-year period after exposure. Incidence rates for endometriosis related to radiation type were: single-energy ...

journal_title：Radiation research

authors： Fanton JW,Golden JG

更新日期：1991-05-01 00:00:00

abstract：:Cytokines function in many roles that are highly relevant to radiation research. This review focuses on how cytokines are structurally organized, how they are induced by radiation, and how they orchestrate mesenchymal, epithelial and immune cell interactions in irradiated tissues. Pro-inflammatory cytokines are the ...

journal_title：Radiation research

authors： Schaue D,Kachikwu EL,McBride WH

更新日期：2012-12-01 00:00:00

abstract：:The intrinsic radiosensitivity of tumor cells is most frequently reported for asynchronous populations, although cell cycle variation in radiosensitivity is known to be significant. Linear-quadratic analyses of survival data for asynchronous human tumor cells show wide variations in the alpha coefficient with smaller ...

journal_title：Radiation research

authors： Biade S,Stobbe CC,Chapman JD

更新日期：1997-04-01 00:00:00

abstract：:Our goal was to determine whether esophageal progenitor cells could be isolated from adult mouse esophagus or bone marrow and shown to home to and proliferate in the irradiated esophagus of recipient mice. Esophageal progenitor cells were isolated from adult male C3H/HeNsd or C57BL/6J green fluorescent protein (GFP(+)...

journal_title：Radiation research

authors： Epperly MW,Guo H,Shen H,Niu Y,Zhang X,Jefferson M,Sikora CA,Greenberger JS

更新日期：2004-09-01 00:00:00

abstract：:We demonstrate by western analysis that the expression levels of TP53 (formerly known as p53), CDKN1A (formerly known as p21Waf1), CDC2 (formerly known as p34cdc2), CCNB1 (cyclin B1) and RAD51 are significantly modulated in confluent, density-inhibited human diploid cell populations exposed to doses where only a small...

journal_title：Radiation research

authors： Azzam EI,de Toledo SM,Gooding T,Little JB

更新日期：1998-11-01 00:00:00

abstract：:A total of 1170 rats comprised of 65 male and 65 female Han Wistar rats per group were exposed for 2 h/day, 5 days/ week for up to 104 weeks to GSM or DCS wireless communication signals at three nominal SARs of 0.44, 1.33 and 4.0 W/kg. A preliminary study confirmed that the highest exposure level was below that which ...

journal_title：Radiation research

authors： Smith P,Kuster N,Ebert S,Chevalier HJ

更新日期：2007-10-01 00:00:00

abstract：:We investigated delayed reproductive death and chromosome bridge formation in mitotic cells in colonies of normal human embryonic cells which survived exposure to 6 Gy of X rays. Eighteen primary clones each derived from control and irradiated cultures were isolated and secondary colonies were grown up. Six of the pri...

journal_title：Radiation research

authors： Suzuki K,Takahara R,Kodama S,Watanabe M

更新日期：1998-10-01 00:00:00

abstract：:The killing effects of ionizing radiation on MOLT-4 cells were studied using colony formation assays, dye exclusion tests, and cell growth analysis. When MOLT-4 cells were exposed to X rays, the fraction of cells stained with erythrosin B increased markedly during the incubation after irradiation at 37 degrees C and r...

journal_title：Radiation research

authors： Shinohara K,Nakano H

更新日期：1993-08-01 00:00:00

abstract：:The effects of 60Co gamma rays on calcitonin gene-related peptide (CGRP)-immunoreactive nerve fibers and neuropeptide Y (NPY)-immunoreactive nerve fibers were examined in mesenteric blood vessels of rats. Using a free-floating immunostaining streptavidin-biotin peroxidase complex method combined with a nickel-enhancem...

journal_title：Radiation research

authors： Zhang CG,Cai WQ,Li Y,Huang WQ,Su HC

更新日期：1998-01-01 00:00:00

abstract：:The German Thorotrast study comprises 2,326 patients and 1,890 controls. Forty-eight Thorotrast patients and 239 controls are still alive and are invited for a follow-up examination every 2 years. In the deceased patients, the following neoplastic diseases with excess rates were registered (Thorotrast/controls): liver...

journal_title：Radiation research

authors： van Kaick G,Dalheimer A,Hornik S,Kaul A,Liebermann D,Lührs H,Spiethoff A,Wegener K,Wesch H

更新日期：1999-12-01 00:00:00

abstract：:Ionization generates a large number of secondary low-energy electrons (LEEs) with a most probable energy of approximately 10 eV, which can break DNA bonds by dissociative electron attachment (DEA) and lead to DNA damage. In this study, we investigated radiation damage to dry DNA induced by X rays (1.5 keV) alone on a ...

journal_title：Radiation research

authors： Choofong S,Cloutier P,Sanche L,Wagner JR

更新日期：2016-11-01 00:00:00