AT1 receptor antagonism does not influence early radiation-induced changes in microglial activation or neurogenesis in the normal rat brain.

Abstract:

:Blockers of the renin-angiotensin-aldosterone system (RAAS) ameliorate cognitive deficits and some aspects of brain injury after whole-brain irradiation. We investigated whether treatment with the angiotensin II type 1 receptor antagonist L-158,809 at a dose that protects cognitive function after fractionated whole-brain irradiation reduced radiation-induced neuroinflammation and changes in hippocampal neurogenesis, well-characterized effects that are associated with radiation-induced brain injury. Male F344 rats received L-158,809 before, during and after a single 10-Gy dose of radiation. Expression of cytokines, angiotensin II receptors and angiotensin-converting enzyme 2 was evaluated by real-time PCR 24 h, 1 week and 12 weeks after irradiation. At the latter times, microglial density and proliferating and activated microglia were analyzed in the dentate gyrus of the hippocampus. Cell proliferation and neurogenesis were also quantified in the dentate subgranular zone. L-158,809 treatment modestly increased mRNA expression for Ang II receptors and TNF-α but had no effect on radiation-induced effects on hippocampal microglia or neurogenesis. Thus, although L-158,809 ameliorates cognitive deficits after whole-brain irradiation, the drug did not mitigate the neuroinflammatory microglial response or rescue neurogenesis. Additional studies are required to elucidate other mechanisms of normal tissue injury that may be modulated by RAAS blockers.

journal_name

Radiat Res

journal_title

Radiation research

authors

Conner KR,Forbes ME,Lee WH,Lee YW,Riddle DR

doi

10.1667/rr2560.1

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

71-83

issue

1

eissn

0033-7587

issn

1938-5404

pii

10.1667/RR2560.1

journal_volume

176

pub_type

杂志文章
  • The relative biological effectiveness in V79 Chinese hamster cells of the neutron capture reactions in boron and nitrogen.

    abstract::V79 Chinese hamster cells were irradiated in the presence of different amounts of boric acid with thermal neutrons at the Medical Research Reactor at Brookhaven National Laboratory. From the linear dose-survival curves observed, a D0 value of 66 rad for the 10B(n, alpha) 7Li neutron capture reaction was obtained. No d...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Gabel D,Fairchild RG,Larsson B,Börner HG

    更新日期:1984-05-01 00:00:00

  • The Estonian study of Chernobyl cleanup workers: I. Design and questionnaire data.

    abstract::Nearly 2% of the male population of Estonia aged 20-39 years were sent to Chernobyl to assist in the cleanup activities after the reactor accident. A cohort of 4,833 cleanup workers was assembled based on multiple and independent sources of information. Information obtained from 3,704 responses to a detailed questionn...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Tekkel M,Rahu M,Veidebaum T,Hakulinen T,Auvinen A,Rytömaa T,Inskip PD,Boice JD Jr

    更新日期:1997-05-01 00:00:00

  • Acute effects of whole-body proton irradiation on the immune system of the mouse.

    abstract::The acute effects of proton whole-body irradiation on the distribution and function of leukocyte populations in the spleen and blood were examined and compared to the effects of photons derived from a (60)Co gamma-ray source. Adult female C57BL/6 mice were exposed to a single dose (3 Gy at 0.4 Gy/min) of protons at sp...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/0033-7587(2000)153[0587:aeowbp]2.0.co;2

    authors: Kajioka EH,Andres ML,Li J,Mao XW,Moyers MF,Nelson GA,Slater JM,Gridley DS

    更新日期:2000-05-01 00:00:00

  • Radiation-induced alterations in mitochondria of the rat heart.

    abstract::Radiation therapy for the treatment of thoracic cancers may be associated with radiation-induced heart disease (RIHD), especially in long-term cancer survivors. Mechanisms by which radiation causes heart disease are largely unknown. To identify potential long-term contributions of mitochondria in the development of ra...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR13452.1

    authors: Sridharan V,Aykin-Burns N,Tripathi P,Krager KJ,Sharma SK,Moros EG,Corry PM,Nowak G,Hauer-Jensen M,Boerma M

    更新日期:2014-03-01 00:00:00

  • Introduction to the special issue on molecular imaging in radiation biology.

    abstract::Molecular imaging is an evolving science that is concerned with the development of novel imaging probes and biomarkers that can be used to non-invasively image molecular and cellular processes. This special issue approaches molecular imaging in the context of radiation research, focusing on biomarkers and imaging meth...

    journal_title:Radiation research

    pub_type:

    doi:10.1667/rr2959.1

    authors: Humm JL,Dewhirst MW,Bhujwalla ZM

    更新日期:2012-04-01 00:00:00

  • MRI Study on the Changes of Bone Marrow Microvascular Permeability and Fat Content after Total-Body X-Ray Irradiation.

    abstract::In this study, we investigated microvascular perfusion status, changes to fat content and fatty acid composition in the bone marrow of rat femurs after total-body irradiation by quantitative permeability parameters of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and ex vivo high-resolution magic angl...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR14865.1

    authors: Wang K,Zha Y,Lei H,Xu X

    更新日期:2018-02-01 00:00:00

  • Eosinophil-Associated Gene Pathways but not Eosinophil Numbers are Differentially Regulated between Synchrotron Microbeam Radiation Treatment and Synchrotron Broad-Beam Treatment by 48 Hours Postirradiation.

    abstract::Synchrotron microbeam radiation treatment (MRT) is a preclinical radiotherapy technique with considerable clinical promise, although some of the underlying radiobiology of MRT is still not well understood. In recently reported studies, it has been suggested that MRT elicits a different tumor immune profile compared to...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR14115.1

    authors: Ibahim MJ,Yang Y,Crosbie JC,Stevenson A,Cann L,Paiva P,Rogers PA

    更新日期:2016-01-01 00:00:00

  • Radiation therapy among atomic bomb survivors, Hiroshima and Nagasaki.

    abstract::As a follow-up to the two previous surveys of radiation therapy among the atomic bomb survivors, a large-scale survey was performed to document (1) the number of radiation therapy treatments received by the atomic bomb survivors and (2) the types of radiation treatments conducted in Hiroshima and Nagasaki. The previou...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Kato K,Antoku S,Russell WJ,Fujita S,Pinkston JA,Hayabuchi N,Hoshi M,Kodama K

    更新日期:1998-06-01 00:00:00

  • A manganese superoxide dismutase (SOD2)-mediated adaptive response.

    abstract::Very low doses of ionizing radiation, 5 to 100 mGy, can induce adaptive responses characterized by elevation in cell survival and reduction in micronuclei formation. Utilizing these end points, RKO human colon carcinoma and transformed mouse embryo fibroblasts (MEF), wild-type or knockout cells missing TNF receptors 1...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR3126.2

    authors: Grdina DJ,Murley JS,Miller RC,Mauceri HJ,Sutton HG,Thirman MJ,Li JJ,Woloschak GE,Weichselbaum RR

    更新日期:2013-02-01 00:00:00

  • Prevalence of anti-hepatitis C virus antibody and chronic liver disease among atomic bomb survivors.

    abstract::To investigate whether exposure to atomic bomb radiation altered the prevalence of hepatitis C virus (HCV) infection or accelerated the progress toward chronic hepatitis after HCV infection, the seropositivity of antibody to hepatitis C virus (anti-HCV) was determined for 6,121 participants in the Adult Health Study o...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/0033-7587(2000)154[0012:poahcv]2.0.co;2

    authors: Fujiwara S,Kusumi S,Cologne J,Akahoshi M,Kodama K,Yoshizawa H

    更新日期:2000-07-01 00:00:00

  • Nicaraven, a Potential Radioprotective Agent, has Very Limited Effects on the Survival of Cancer Cells and the Growth of Established Tumors.

    abstract::Radiotherapy is one of the major treatment modalities for the management of various cancers, however, it is limited by the severe side effects and complications experienced by some patients. Nicaraven, a chemically synthesized hydroxyl radical-specific scavenger, has been shown to protect normal tissues from radiation...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR14614.1

    authors: Yan C,Luo L,Urata Y,Goto S,Guo CY,Li TS

    更新日期:2017-02-22 00:00:00

  • Nuclear protein following heat shock: protein removal kinetics and cell cycle rearrangements.

    abstract::Nuclear protein and DNA content of HeLa cells was determined as a function of time following hyperthermia by staining isolated nuclei with two fluorescent dyes: fluorescein isothiocyanate (FITC) for protein content and propidium iodide (PI) for DNA content. Bivariate FITC and PI histograms were obtained by flow cytome...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Roti Roti JL,Uygur N,Higashikubo R

    更新日期:1986-08-01 00:00:00

  • Basal cell skin cancer after total-body irradiation and hematopoietic cell transplantation.

    abstract::Previous studies identified radiation therapy as a key modifier of basal cell carcinoma (BCC) risk in survivors of hematopoietic cell transplantation (HCT). In the present analysis, risk of BCC was analyzed in relation to age at transplant, attained age, race, total-body irradiation (TBI), and radiation fractionation ...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR1469.1

    authors: Schwartz JL,Kopecky KJ,Mathes RW,Leisenring WM,Friedman DL,Deeg HJ

    更新日期:2009-02-01 00:00:00

  • Characterization of abnormal nuclei in renal proximal tubules after irradiation.

    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:

    authors: Otsuka M,Meistrich ML,Brock WA

    更新日期:1988-07-01 00:00:00

  • Identification of nitroxide radioprotectors.

    abstract::The nitroxide Tempol, a stable free radical, has recently been shown to protect mammalian cells against several forms of oxidative stress including radiation-induced cytotoxicity. To extend this observation, six additional water-soluble nitroxides with different structural features were evaluated for potential radiopr...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Hahn SM,Wilson L,Krishna CM,Liebmann J,DeGraff W,Gamson J,Samuni A,Venzon D,Mitchell JB

    更新日期:1992-10-01 00:00:00

  • A versatile and rapid assay of radiosensitivity of peripheral blood leukocytes based on DNA and surface-marker assessment of cytotoxicity.

    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

    pub_type: 杂志文章

    doi:

    authors: Crompton NE,Ozsahin M

    更新日期:1997-01-01 00:00:00

  • Different oxygen enhancement ratios for induced and unrejoined DNA double-strand breaks in eukaryotic cells.

    abstract::DNA double-strand breaks (DSBs) are 2.9 times more frequently induced in yeast cells exposed to sparsely ionizing 30-MeV electrons under oxic compared to anoxic conditions. The rejoining of DSBs induced under anoxic conditions was investigated under conditions allowing repair of potentially lethal damage and compared ...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Frankenberg-Schwager M,Frankenberg D,Harbich R

    更新日期:1991-12-01 00:00:00

  • Knockdown of cytoglobin expression sensitizes human glioma cells to radiation and oxidative stress.

    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

    authors: Fang J,Ma I,Allalunis-Turner J

    更新日期:2011-08-01 00:00:00

  • A microdosimetric-kinetic model for cell killing by protracted continuous irradiation II: brachytherapy and biologic effective dose.

    abstract::Relationships based on the microdosimetric-kinetic model are presented that calculate the average number of lethal lesions, and the associated cell survival, produced in mammalian cells by exposure to protracted continuous irradiation by temporary and permanent implantation of radioactive sources. The influence of cel...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR13558.1

    authors: Hawkins RB,Inaniwa T

    更新日期:2014-07-01 00:00:00

  • Sex-Specific Effects of a Wartime-Like Radiation Exposure on Cognitive Function.

    abstract::Evaluating the risk for central nervous system (CNS) effects after whole-body or partial-body irradiation presents challenges due in part to the varied exposure scenarios in the context of occupational, accidental or wartime releases. Risk estimations are further complicated by the fact that robust changes in brain fu...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR15413.1

    authors: Baddour AAD,Apodaca LA,Alikhani L,Lu C,Minasyan H,Batra RS,Acharya MM,Baulch JE

    更新日期:2020-01-01 00:00:00

  • Radioprotection of mice with interleukin-1: relationship to the number of erythroid and granulocyte-macrophage colony-forming cells.

    abstract::This report presents the results of an investigation of changes in the number of erythroid and granulocyte-macrophage colony-forming cells (GM-CFC) that had occurred in tissues of normal B6D2F1 mice 20 h after administration of a radioprotective dose (150 ng) of human recombinant interleukin-1 (rIL-1). Neutrophilia in...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Schwartz GN,Patchen ML,Neta R,MacVittie TJ

    更新日期:1990-02-01 00:00:00

  • Relative contribution of bystander and targeted cell killing to the low-dose region of the radiation dose-response curve.

    abstract::Human keratinocytes show a bystander effect when exposed to low doses of low-LET radiation. In this paper, data are presented showing a method of correcting the overall survival curve to enable analysis of the relative contributions of the bystander effect and the effect attributable to direct interaction of the radia...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/0033-7587(2000)153[0508:rcobat]2.0.co;2

    authors: Seymour CB,Mothersill C

    更新日期:2000-05-01 00:00:00

  • Identification of druggable targets for radiation mitigation using a small interfering RNA screening assay.

    abstract::Currently, there is a serious absence of pharmaceutically attractive small molecules that mitigate the lethal effects of an accidental or intentional public exposure to toxic doses of ionizing radiation. Moreover, cellular systems that emulate the radiobiologically relevant cell populations and that are suitable for h...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/rr2810.1

    authors: Zellefrow CD,Sharlow ER,Epperly MW,Reese CE,Shun T,Lira A,Greenberger JS,Lazo JS

    更新日期:2012-09-01 00:00:00

  • Different Sequences of Fractionated Low-Dose Proton and Single Iron-Radiation-Induced Divergent Biological Responses in the Heart.

    abstract::Deep-space travel presents risks of exposure to ionizing radiation composed of a spectrum of low-fluence protons (1H) and high-charge and energy (HZE) iron nuclei (e.g., 56Fe). When exposed to galactic cosmic rays, each cell in the body may be traversed by 1H every 3-4 days and HZE nuclei every 3-4 months. The effects...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR14667.1

    authors: Sasi SP,Yan X,Zuriaga-Herrero M,Gee H,Lee J,Mehrzad R,Song J,Onufrak J,Morgan J,Enderling H,Walsh K,Kishore R,Goukassian DA

    更新日期:2017-08-01 00:00:00

  • Effect of heat shock on the intracellular distribution of proteins.

    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:

    authors: Murnane JP,Li GC

    更新日期:1985-03-01 00:00:00

  • Inflammatory and anti-inflammatory cytokines regulate the recovery from sublethal X irradiation in rat thymus.

    abstract::We investigated the regeneration of rat thymus after sublethal X irradiation (6 Gy). The number of thymocytes was much lower on day 3 after irradiation, and many apoptotic cells were observed. However, by day 5, there had been a rapid proliferation of thymocytes. Since cytokines are considered to be important regulato...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/0033-7587(2002)157[0281:iaaicr]2.0.co;2

    authors: Mizutani N,Fujikura Y,Wang YH,Tamechika M,Tokuda N,Sawada T,Fukumoto T

    更新日期:2002-03-01 00:00:00

  • Radiosensitizing and cytocidal effects of misonidazole: evidence for separate modes of action.

    abstract::Hypoxic BP-8 murine sarcoma cells were exposed to misonidazole and/or radiation and the kinetics and extent of cell death were evaluated with the [125I]iododeoxyuridine-prelabeling assay. Cell death after treatment with lethal doses of misonidazole was rapid and essentially complete within 2 or 3 days after drug expos...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Hofer KG,Friedland JL,Dynlacht J,Hofer MG

    更新日期:1987-07-01 00:00:00

  • A confirmation study of Russian and Ukrainian data on effects of 2450 MHz microwave exposure on immunological processes and teratology in rats.

    abstract::In a series of Russian and Ukrainian papers published from 1974-1986, it was reported that 30-day whole-body exposures to continuous-wave (CW) radiofrequency (RF) radiation at 2375 MHz and 5 W/m(2) disrupted the antigenic structure of rat brain tissue. The authors suggested that this action caused an autoimmune respon...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR1541.1

    authors: de Gannes FP,Taxile M,Duleu S,Hurtier A,Haro E,Geffard M,Ruffié G,Billaudel B,Lévêque P,Dufour P,Lagroye I,Veyret B

    更新日期:2009-11-01 00:00:00

  • Mechanisms and Characterization of the Pulsed Electron-Induced Grafting of Styrene onto Poly(tetrafluoroethylene-co-hexafluoropropylene) to Prepare a Polymer Electrolyte Membrane.

    abstract::During the pulsed-electron beam direct grafting of neat styrene onto poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP) substrate, the radiolytically-produced styryl and carbon-centered FEP radicals undergo various desired and undesired competing reactions. In this study, a high-dose rate is used to impede the und...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:10.1667/RR15006.1

    authors: Kim B,Weaver A,Chumakov M,Pazos IM,Poster DL,Gaskell K,Han DH,Scherer G,Yandrasits MA,Lee BC,Al-Sheikhly M

    更新日期:2018-09-01 00:00:00

  • G2/M-phase arrest and release in ataxia telangiectasia and normal cells after exposure to ionizing radiation.

    abstract::Cells from patients with ataxia telangiectasia (AT) are abnormal in their response to irradiation as judged by clonogenic survival and accumulation in G2 phase. The relationship of the results of these two assays, however, is still a matter of controversy. Flow cytometry was used to measure the distribution of cells i...

    journal_title:Radiation research

    pub_type: 杂志文章

    doi:

    authors: Hong JH,Gatti RA,Huo YK,Chiang CS,McBride WH

    更新日期:1994-10-01 00:00:00