Radioprotection by DMSO in nitrogen-saturated mammalian cells exposed to helium ion beams

Hirayama, Ryoichi*; Matsumoto, Yoshitaka*; Kase, Yuki*; Noguchi, Miho; Ando, Koichi*; Ito, Atsushi*; Okayasu, Ryuichi*; Furusawa, Yoshiya*

The contribution of OH radical-mediated indirect action by particle beams under hypoxic irradiation condition was investigated by using a radical scavenger. V79 cells were irradiated with 150 MeV/nucleon helium ions at an LET of 2.2 keV/mm in the presence or absence of DMSO, and their colony survivals were determined. The contribution of indirect action to cell killing under hypoxic condition was estimated to be 52 %. We conclude that OH radical mediated indirect action still has a half in total contribution on cell killing under hypoxic condition.

Language	:	English
Journal	:	Radiation Physics and Chemistry
Volume	:	78
Number	:	12
Pages	:	p.1175 - 1178
Publication Year/Month	:	2009/12
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Paper URL	:	https://doi.org/10.1016/j.radphyschem.2009.07.006
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Keywords	:	no keyword
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Registration No. : AA20110246
JAEA Abstracts No. :
Paper Submission No. : 9405

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