標題: DNA double-strand breaks induced along the trajectory of particles
作者: Cho, I. C.
Niu, H.
Chen, C. H.
Yu, Y. C.
Hsu, C. H.
奈米科技中心
友訊交大聯合研發中心
Center for Nanoscience and Technology
D Link NCTU Joint Res Ctr
關鍵字: Accelerator;DNA damage;Biological effect of radiation
公開日期: 15-Dec-2011
摘要: It is well-known that the DNA damage caused by charged particles considerably differs from damage due to electromagnetic radiation. In the case of irradiation by charged particles the DNA lesions are more complex and clustered. Such clustered damage is presumed difficult to be repaired, and is potentially lethal. In this study, we utilize a 90 degrees-scattering system and related imaging techniques to investigate the accumulation of gamma-H2AX along the trajectory of charged particles. By immunostaining the gamma-H2AX protein, optical images of corresponding double strand breaks were observed using a high resolution confocal microscope. We demonstrate the difference in the accumulation of gamma-H2AX from irradiation by 1 MeV protons and that of 150 key X-rays. The acquired images were arranged and reconstructed into a 3D image using ImageJ software. We discovered that the gamma-H2AX foci, following irradiation by protons, have a tendency to extend in the beam direction, while those from X-ray irradiation tend to be smaller and more randomly distributed. These results can be explained by the physical model of energy deposition. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.nimb.2011.04.099
http://hdl.handle.net/11536/14978
ISSN: 0168-583X
DOI: 10.1016/j.nimb.2011.04.099
期刊: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume: 269
Issue: 24
起始頁: 3129
結束頁: 3136
Appears in Collections:Conferences Paper


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