Sussman Raquel
Marine Biological Laboratory, Woods Hole, MA 02543, USA.
Proc Natl Acad Sci U S A. 2007 Aug 14;104(33):13379-83. doi: 10.1073/pnas.0706157104. Epub 2007 Aug 8.
Damage to the genome is unavoidable in living creatures, because of sunlight exposure as well as environmental chemicals present in food and drinking water. There is a need to monitor and purify the drinking water; therefore, several methods of detection have been developed. A very promising model system for this purpose is the zebrafish (Danio rerio), which is endowed with special qualities for detecting external as well as internal abnormalities. Grossman and Wei's assay [Grossman L, Wei Q (1995) Clin Chem 12:1854-1863], which measures the expression level of a nonreplicating recombinant plasmid DNA containing a UV-damaged luciferase reporter gene, shows that zebrafish can repair chromosomal lesions to a much greater extent than the human population. This vertebrate model is still very promising after possible down-regulation of the DNA repair enzymes.
由于暴露在阳光下以及食物和饮用水中存在的环境化学物质,生物体内的基因组损伤是不可避免的。因此有必要对饮用水进行监测和净化,为此已经开发了几种检测方法。用于此目的的一个非常有前景的模型系统是斑马鱼(Danio rerio),它具有检测外部和内部异常的特殊能力。格罗斯曼和魏的检测方法[格罗斯曼L,魏Q(1995年)《临床化学》12:1854 - 1863],该方法测量含有紫外线损伤的荧光素酶报告基因的非复制重组质粒DNA的表达水平,结果表明斑马鱼修复染色体损伤的程度比人类大得多。在DNA修复酶可能下调后,这个脊椎动物模型仍然非常有前景。