Can radiation increase the risk of cardiovascular diseases? Evaluation by animal model studies.

2015 Fiscal Year Final Research Report

• Project/Area Number: 24510080
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: Radiation Effects Research Foundation
• Principal Investigator: TAKAHASHI Norio 公益財団法人放射線影響研究所, 顧問 (40333546)
• Co-Investigator(Kenkyū-buntansha): OHISHI Waka 放射線影響研究所, 臨床研究部(広島), 部長 (20393423) ; NIWA Yasuharu 放射線影響研究所, 分子生物科学部, 副主任研究員 (40284286)
• Co-Investigator(Renkei-kenkyūsha): NABIKA Tohru 島根大学, 医学部・病態病理学, 教授 (50180534) ; INABA Toshiya 広島大学, 原爆放射線医科学研究所・がん分子病態研究分野, 教授 (60281292)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 循環器疾患 / 動物実験 / 放射線影響 / リスク推定 / 作用機序

Outline of Final Research Achievements

Data from epidemiological studies for the atomic-bomb survivors indicate that risk for circulatory diseases (CDs) were associated with radiation exposure. In this study, we intend to assess the relationship between CDs and radiation exposure by animal model studies and to obtain information about biological mechanisms.
In the studies using stroke prone spontaneous hypertensive rat (SHRSP), the life span of irradiated rats was significantly shorter than unirradiated rats, and the damage, such as cerebral hemorrhage, in irradiated rats was more advanced than that observed in the organs of unirradiated rats. On the other hand, in the studies using spontaneous hypertensive rat (SHR), the systolic blood pressure level of irradiated rats increased with increasing of dose. Moreover, the amount of various blood biomarkers increased/decreased according to the radiation doses. The results revealed that our studies can play important roles to hypothesize on the mechanisms.

Free Research Field

放射線と循環器疾患リスクの相関。動物実験。生体分子の測定。