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Mancuso, M.* ; Pasquali, E.* ; Braga-Tanaka III, I.* ; Tanaka, S.* ; Pannicelli, A.* ; Giardullo, P.* ; Pazzaglia, S.* ; Tapio, S. ; Atkinson, M.J. ; Saran, A.*

Acceleration of atherogenesis in ApoE-/- mice exposed to acute or low-dose-rate ionizing radiation.

Oncotarget 6, 31263-31271 (2015)
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Open Access Gold
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There is epidemiological evidence for increased non-cancer mortality, primarily due to circulatory diseases after radiation exposure above 0.5 Sv. We evaluated the effects of chronic low-dose rate versus acute exposures in a murine model of spontaneous atherogenesis. Female ApoE-/- mice (60 days) were chronically irradiated for 300 days with gamma rays at two different dose rates (1 mGy/day; 20 mGy/day), with total accumulated doses of 0.3 or 6 Gy. For comparison, age-matched ApoE-/- females were acutely exposed to the same doses and sacrificed 300 days post-irradiation. Mice acutely exposed to 0.3 or 6 Gy showed increased atherogenesis compared to age-matched controls, and this effect was persistent. When the same doses were delivered at low dose rate over 300 days, we again observed a significant impact on global development of atherosclerosis, although at 0.3 Gy effects were limited to the descending thoracic aorta. Our data suggest that a moderate dose of 0.3 Gy can have persistent detrimental effects on the cardiovascular system, and that a high dose of 6 Gy poses high risks at both high and low dose rates. Our results were clearly nonlinear with dose, suggesting that lower doses may be more damaging than predicted by a linear dose response.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Apoe Mice ; Aorta ; Atherosclerosis ; Radiation
Language english
Publication Year 2015
HGF-reported in Year 2015
ISSN (print) / ISBN 1949-2553
e-ISSN 1949-2553
Journal OncoTarget
Quellenangaben Volume: 6, Issue: 31, Pages: 31263-31271 Article Number: , Supplement: ,
Publisher Impact Journals LLC
Reviewing status Peer reviewed
Institute(s) Institute of Radiation Biology (ISB)
POF-Topic(s) 30202 - Environmental Health
Research field(s) Radiation Sciences
PSP Element(s) G-500200-001
PubMed ID 26359350
DOI 10.18632/oncotarget.5075
WOS ID WOS:000363185200076
Erfassungsdatum 2015-09-13
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