Adaptive response in zebrafish embryos induced using microbeam protons as priming dose and X-ray photons as challenging dose

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

28 Scopus Citations
View graph of relations

Author(s)

  • Viann Wing Yan Choi
  • Teruaki Konishi
  • Masakazu Oikawa
  • Hiroyuki Iso

Detail(s)

Original languageEnglish
Pages (from-to)657-664
Journal / PublicationJournal of Radiation Research
Volume51
Issue number6
Publication statusPublished - Nov 2010

Abstract

In the studies reported here, a high-linear-energy-transfer (high-LET)-radiation dose was used to induce adaptive response in zebrafish embryos in vivo. Microbeam protons were used to provide the priming dose and X-ray photons were employed to provide the challenging dose. The microbeam irradiation system (Single-Particle Irradiation System to Cell, acronym as SPICE) at the National Institute of Radiological Sciences (NIRS), Japan, was employed to control and accurately quantify the number of protons at very low doses, viz., about 100 μGy. The embryos were dechorionated at 4 h post fertilization (hpf) and irradiated at 5 hpf by microbeam protons. For each embryo, ten irradiation points were arbitrarily chosen without overlapping with one another. To each irradiation point, 5, 10 or 20 protons each with an energy of 3.4 MeV were delivered. The embryos were returned back to the incubator until 10 hpf to further receive the challenging exposure, which was achieved using 2 Gy of X-ray irradiation, and then again returned to the incubator until 24 hpf for analyses. The levels of apoptosis in zebrafish embryos at 25 hpf were quantified through terminal dUTP transferase-mediated nick end-labeling (TUNEL) assay, with the apoptotic signals captured by a confocal microscope. The results revealed that 5 to 20 protons delivered at 10 points each on the embryos, or equivalently 110 to 430 μGy, could induce radioadaptive response in the zebrafish embryos in vivo.

Research Area(s)

  • Adaptive response, Danio rerio, Microbeam, Protons, Zebrafish embryos

Citation Format(s)

Adaptive response in zebrafish embryos induced using microbeam protons as priming dose and X-ray photons as challenging dose. / Choi, Viann Wing Yan; Konishi, Teruaki; Oikawa, Masakazu; Iso, Hiroyuki; Cheng, Shuk Han; Yu, Kwan Ngok.

In: Journal of Radiation Research, Vol. 51, No. 6, 11.2010, p. 657-664.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review