Abstract：
:Understanding the cognitive and behavioral consequences of brain exposures to low-dose ionizing radiation has broad relevance for health risks from medical radiation diagnostic procedures, radiotherapy and environmental nuclear contamination as well as for Earth-orbit and space missions. Analyses of transcriptome profiles of mouse brain tissue after whole-body irradiation showed that low-dose exposures (10 cGy) induced genes not affected by high-dose radiation (2 Gy) and that low-dose genes were associated with unique pathways and functions. The low-dose response had two major components: pathways that are consistently seen across tissues and pathways that were specific for brain tissue. Low-dose genes clustered into a saturated network (P < 10(-53)) containing mostly down-regulated genes involving ion channels, long-term potentiation and depression, vascular damage, etc. We identified nine neural signaling pathways that showed a high degree of concordance in their transcriptional response in mouse brain tissue after low-dose irradiation, in the aging human brain (unirradiated), and in brain tissue from patients with Alzheimer's disease. Mice exposed to high-dose radiation did not show these effects and associations. Our findings indicate that the molecular response of the mouse brain within a few hours after low-dose irradiation involves the down-regulation of neural pathways associated with cognitive dysfunctions that are also down-regulated in normal human aging and Alzheimer's disease.
journal_name
Radiat Resjournal_title
Radiation researchauthors
Lowe XR,Bhattacharya S,Marchetti F,Wyrobek AJdoi
10.1667/RR1389.1subject
Has Abstractpub_date
2009-01-01 00:00:00pages
53-65issue
1eissn
0033-7587issn
1938-5404pii
RR1389journal_volume
171pub_type
杂志文章abstract：:The distribution and kinetics of proximal tubular cells with abnormally large nuclei, which were observed in irradiated mouse kidneys before any other obvious histological effects, were investigated. Six months after the administration of 13 or 15 Gy, little histopathological change was noted, in the kidneys of C3H mi...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1988-07-01 00:00:00
abstract：:The relative biological effectiveness was determined using sex-linked recessive lethals induced in Drosophila spermatozoa as the biological effect. The sex-linked recessive lethal test, a measure of mutations induced in germ cells and transmitted through successive generations, yields a linear dose-response curve in t...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1989-03-01 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
pub_type： 杂志文章
doi：
更新日期：1968-11-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/rr3085
更新日期：2003-12-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR0578.1
更新日期：2007-03-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/0033-7587(2001)155[0866:tpromj]2.0.co;2
更新日期：2001-06-01 00:00:00
abstract：:To improve radioimmunotherapy with Auger electron emitters, we assessed whether the biological efficiency of (125)I varied according to its localization. A-431 and SK-OV-3 carcinoma cells were incubated with increasing activities (0-4 MBq/ml) of (125)I-labeled vectors targeting the cell membrane, the cytoplasm or the ...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR1359.1
更新日期：2008-08-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR3544.1
更新日期：2006-05-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1995-09-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1994-05-01 00:00:00
abstract：:Single crystals of guanine hydrobromide monohydrate, in which the guanine base is protonated at N7, were X-irradiated at 8 and 65 K. Using K-band ESR, ENDOR, and field-swept-ENDOR (FSE) techniques, the crystals were studied between 8 K and room temperature. There was evidence for five different radicals, RI-RV, immedi...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1991-02-01 00:00:00
abstract：:To study the dynamics of protein recruitment to DNA lesions, ion beams can be used to generate extremely localized DNA damage within restricted regions of the nuclei. This inhomogeneous spatial distribution of lesions can be visualized indirectly and rapidly in the form of radiation-induced foci using immunocytochemic...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/rr3374
更新日期：2005-06-01 00:00:00
abstract：:Exposure of cells to heat induces thermotolerance, a transient resistance to subsequent heat challenges. It has been shown that thermotolerance is correlated in time with the enhanced synthesis of heat shock proteins. In this study, the association of induced heat shock proteins with various cellular fractions was inv...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1985-03-01 00:00:00
abstract：:Differentiation of Friend erythroleukemia cells (FELC) was induced with 1.5% dimethyl sulfoxide (DMSO) in the culture medium. Cell growth, erythroid differentiation, and radiosensitivity of the proliferative capacity of the cells were measured and compared to a noninduced control culture of identical age. Induced cell...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：:We have monitored the end points of cellular survival, micronucleus formation and neoplastic transformation frequency to assess adaptation to ionizing radiation in the C3H 10T1/2 mouse embryo cell system. Plateau-phase cells were pre-exposed to an adapting dose of 0.1 to 1.5 Gy low-dose-rate gamma radiation 3.5 h prio...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1994-04-01 00:00:00
abstract：:Ionizing radiation induces clustered DNA damage sites, whereby two or more individual DNA lesions are formed within one or two helical turns of DNA by a single radiation track. A subset of DNA clustered damage sites exist in which the lesions are located in tandem on the same DNA strand. Recent studies have establishe...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/rr3284
更新日期：2005-01-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1990-06-01 00:00:00
abstract：:The relationship of ionizing radiation to the age-related ophthalmological findings of the 1978-1980 ophthalmological examination of A-bomb survivors of Hiroshima and Nagasaki has been reanalyzed using DS86 eye organ dose estimates. The main purpose of this reevaluation was to determine whether age and radiation expos...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1992-09-01 00:00:00
abstract：:Sequential examinations were done on the pulmonary cytokinetics and pulmonary lesions in rats after inhalation exposure to (239)PuO(2) aerosols to investigate the pathogenesis of lung tumors. Total cell yields of lavaged bronchoalveolar cells as well as the estimated numbers of pulmonary alveolar macrophages were sign...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/0033-7587(2000)154[0253:ppolti]2.0.co;2
更新日期：2000-09-01 00:00:00
abstract：:Cytoglobin is a recently identified vertebrate globin whose functions include scavenging reactive oxygen and nitrosative species. In tumor cells, CYGB may function as a tumor suppressor gene. Here we show that knockdown of cytoglobin expression can sensitize human glioma cells to oxidative stress induced by chemical i...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/rr2517.1
更新日期：2011-08-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1988-12-01 00:00:00
abstract：:The high-energy neutron component of the space radiation environment in thick structures such as the International Space Station contributes to the total radiation dose received by an astronaut. Detector design constraints such as size and mass have limited the energy range of neutron spectrum measurements in orbit to...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/0033-7587(2003)159[0154:henswt]2.0.co;2
更新日期：2003-02-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR14828.1
更新日期：2017-12-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1992-04-01 00:00:00
abstract：:Many of these deaths could be prevented if there were better screening methods to uncover the disease when it is limited and most responsive to intervention. Novel biomarkers of early-stage disease are therefore needed. By applying the principle of "oncology recapitulates ontogeny", we have discovered three homeobox (...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/0033-7587(2001)155[0235:pcdtma]2.0.co;2
更新日期：2001-01-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/0033-7587(2001)156[0388:tkmfro]2.0.co;2
更新日期：2001-10-01 00:00:00
abstract：:Radiation exposure causes DNA breaks leading to structural chromosome aberrations that can be carcinogenic. Lifetime cancer risks are elevated in irradiated children compared to similarly exposed adults. To determine the extent to which age influences the frequency and types of chromosome damage in response to ionizin...
journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR13598.1
更新日期：2014-06-01 00:00:00
abstract：:Relative biological effectiveness (RBE) and oxygen enhancement ratio (OER) values of different neutron beams produced at the variable energy cyclotron "Cyclone" of Louvain-la-Neuve (Belgium) were determined. The neutrons were obtained by bombarding a beryllium target with 34-, 45-, 65-, or 75-MeV protons or with 50-Me...
journal_title：Radiation research
pub_type： 杂志文章
doi：
更新日期：1989-02-01 00:00:00
abstract：:An understanding of proton radiobiology is critical for optimization of both proton radiotherapy and assessment of carcinogenesis risk from space radiation. Although the physical aspects of proton beam radiobiology is well understood, the biological aspects, particularly the complex biological end points, have been un...
journal_title：Radiation research
pub_type： 杂志文章,评审
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更新日期：2013-03-01 00:00:00
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journal_title：Radiation research
pub_type： 杂志文章
doi：10.1667/RR3232.1
更新日期：2013-06-01 00:00:00
