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射线类型主要分为高传能线密度(linear energy transfer, LET)和低LET。高LET主要包括太空射线和高能重离子流,低LET主要包括X、γ射线。由于高、低LET导致辐射损伤机制的不同,所产生的染色体畸变类型也存在差异。多色荧光原位杂交(multicolor fluorescence in situ hybridization, M-FISH)是辐射损伤中染色体畸变检测的前沿技术,与传统染色体显带技术和单色荧光原位杂交相比有明显的优越性。M-FISH的显色方法也称多色荧光原位杂交显带(multicolor-banding fluorescence in situ hybridisation, M-banding FISH),简称mBAND。mBAND技术应用于高、低LET辐射损伤染色体畸变的检测也已成为研究的热点[1]。
多色荧光原位杂交显带技术在高、低传能线密度辐射损伤中的应用
Multicolour-banding fluorescence in situ hybridisation analysis of radiation damage induced by high- and low-linear energy transfer rays
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摘要: 淋巴细胞染色体畸变率与电离辐射密切相关,并且已经广泛应用于辐射损伤的生物剂量评估。多色荧光原位杂交显带技术(mBAND)是染色体畸变检测的重要新兴技术,并且逐步应用于不同传能线密度(LET)射线所引起的染色体畸变检测。该文对mBAND技术在X、γ射线所属的低LET射线和太空射线及高能重离子流所属的高LET射线中的应用,二者引起不同染色体畸变类型以及产生的不同辐射生物剂量效能作综合阐述。
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关键词:
- 染色体畸变 /
- 辐射损伤 /
- 传能线密度 /
- 荧光原位杂交显带,多色
Abstract: Lymphocyte chromosome aberrations rate is closely related with ionizing radiation, and it has been widely used in biological dose evaluating. Multicolour-banding fluorescence in situ hybridisation(mBAND) is a newly-emerging technology in chromosome aberrations checking. It has been used in chromosome aberrations checking of different linear energy transfer(LET) rays. This article briefly reviewed mBAND using in different chromosome aberrations checking and different radiation biological evaluation by both low LET(such as X and γ rays) and high LET(such as space lines and energetic heavy ions). -
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