Effects of Radiation on Blood Pressure and Body Weight in the Spontaneously Hypertensive Rat Model. Are Radiation Effects on Blood Pressure Affected by Genetic Background?

Norio Takahashi, Munechika Misumi, Yasuharu Niwa, Hideko Murakami, Waka Ohishi, Toshiya Inaba, Akiko Nagamachi, Satoshi Tanaka, Ignacia Braga Tanaka, Gen Suzuki

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this work, we utilized spontaneously hypertensive rats (SHR) and Wister Kyoto rats (WKY), from which the SHR was established, to evaluate the effects of whole-body acute radiation on the cardiovascular system at doses from 0 to 4 Gy. In the irradiated SHR, the systolic blood pressure (SBP) increased with increasing dose, while body weight gain decreased with increasing radiation dose. Furthermore, pathological observations of SHR demonstrated that the number of rats with cystic degeneration in the liver increased with increasing dose. The effects observed among SHR, such as increased SBP and retardation of body weight gain, appear very similar to those observed in Japanese atomic bomb survivors. In contrast, the SBP among WKY did not change relative to dose; the body weight, however, did change, as in the SHR. Therefore, the association between radiation exposure and SBP, but not between radiation exposure and retardation of body weight gain, may be affected by genetic background, as evident from strain difference. These results suggest that the SHR and WKY animal models may be useful for studying radiation effects on non-cancer diseases including circulatory diseases, chronic liver disease and developmental retardation.

Original languageEnglish
Pages (from-to)552-559
Number of pages8
JournalRadiation Research
Volume193
Issue number6
DOIs
Publication statusPublished - 01-06-2020
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Radiation
  • Biophysics
  • Radiology Nuclear Medicine and imaging

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