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Google scholar 搜 fluorescent whitening agent
看到这篇文章
Effect of fluorescent whitening agent on the transcription of cell damage-related genes in zebrafish embryos
Effect of fluorescent whitening agent on the transcription of cell damage-related genes in zebrafish embryos我不是做这方面研究的。直接把abstract贴在下面
ABSTRACT
7-Diethylamino-4-methylcoumarin (DEMC) is a fluorescent whitening agent (FWAs). There have been some studies on DEMC's protective effects against biological activity but there are few papers about the in vivo toxicity of DEMC. In this study, we used wild-type zebrafish embryos 3 days post fertilization (dpf). Test solutions with DEMC concentrations were negative control (without vehicle), 0 (with vehicle, 0.01% v/v ethanol), 0.25, 0.5, 0.75, 1.0, 1.25, 1.5 and 2 ppm. Embryos and larvae were counted for survival rate and hatching rate. Heart rates were also counted at 2.5 and 3.0 dpf. At 3.0 dpf, quantitative RT-PCR was performed with some samples (0, 0.25, 0.75 and 1.25 ppm) to determine the toxic effect to DEMC by detecting the expression levels of toxic-responsive genes. We used 11 genes, which included oxidative stress-related genes [sod(Mn), sod(Cu,Zn) and hsp70], mitochondrial metabolism-related genes (coxI, pyc, cyt and cyclinG1) and apoptosis-related genes (c-jun, bcl2, bax and p53). High-concentration DEMC-treated groups showed significant different survival rate, hatching rate and heart rate compared with low-concentration DEMC-treated groups. The LC50 of this chemical, 0.959 ppm, was calculated. We also confirmed that some genes in the DEMC exposure groups showed significantly up-regulations in expression levels compared with control groups. We concluded that the fluorescence agent, DEMC, has possible developmental toxicities and alteration effect of gene expression, which are related to oxidative stress, mitochondrial metabolism and apoptosis in zebrafish embryos. Copyright © 2011 John Wiley & Sons, Ltd.
简单概括,DEMC这种荧光剂是可能有毒性的。
我不理解果壳上的文章怎么那么敢确定荧光剂完全无害呢?
蓝月亮与增白剂:躺着也中枪
里面引用的两篇英文文献是1974,1975年的。它们没有发现有害的情况。
我引的文献是2011年的,是发现有可能有害的。
另外,荧光剂有很多种,在没有全面检验每一种荧光剂对生物,对环境的影响前,我们是该假设,它是完全安全的,还是假设,它是可能有危险的?
这个回答也发在其它荧光剂相关的问题下。 |
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