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gary286

木虫 (正式写手)

[求助] 审稿人问细胞毒性。why the sample has less viability at 4h than 8h,24h?

审稿人问细胞毒性。why the sample has less viability at 4h than 8h,24h?

无机材料用MTT法做细胞毒性,4小时的cell viability 明显小于8小时和24小时的。审稿人问原因,审稿人很可能也不是搞生物的。我能简单回答是误差吗(experiment error)?本人对细胞毒性检测不太了解,见笑了,希望大家帮忙看下,给点解释。。

PS, 无机材料为生物相容性材料修饰的Fe3O4。
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gary286

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★ ★ ★
taozhikai(金币+3): 谢谢 2011-06-13 09:30:25
引用回帖:
Originally posted by tyl681108 at 2011-06-13 08:58:06:
把你的方法和结果贴上来看看

多谢,叙述如下:
The cytotoxicity study was measured using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay in MCF-7 cells. MCF-7 cells were maintained in DMEM media supplemented with 10% fetal bovine serum (FBS) (Gibco, Grand Island, NY., USA), 2 mM L-glutamine, 100 mg/ml streptomycin, and 100 U/ml penicillin. The cell lines were cultured in 35 mm cover glass-bottom dish (SPL Life Sciences, Seoul, South Korea) at 37 oC in a humidified atmosphere containing 5% CO2. The magnetite particles at concentrations of 0, 0.03, 0.3 mg/mL in DMEM medium were mixed with the cells, and the cells were incubated for 4 h, 8 h, 24 h, 48 h, and 96 h. Optical density of each sample was measured in a Dynatech MR7000 ELISA reader at 570 nm. The optical density of the media was proportional to the number of viable cells. Inhibition of proliferation was evaluated as a percentage of control growth. The results were expressed as an average over three nominally identical measurements.


0.03    4~96h           97.33263;  96.01693;96.71721;97.61354;95.56296
0.3      4~96h         89.94877; 93.27308;94.00933;94.81344;91.00256
5楼2011-06-13 09:08:04
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pepperp

至尊木虫 (文坛精英)

【答案】应助回帖


gary286(金币+8): 多谢应助。。我也认为没有说服力,时间越长的确应该毒性越大啊。。请提示下如何回答完备呢? 2011-06-13 08:56:47
lixiangde(金币+1): 感谢回帖交流 2011-06-14 15:27:56
你的回答好弱!一般时间越长毒性越大
2楼2011-06-13 08:37:07
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tyl681108

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【答案】应助回帖


gary286(金币+5): 多谢应助,方法和结果如下 2011-06-13 09:09:10
lixiangde(金币+1): 感谢回帖交流 2011-06-14 15:28:03
把你的方法和结果贴上来看看
3楼2011-06-13 08:58:06
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gary286

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补充下,4 h -8h -24h -48h -96h,, cell viability分别为 。。90%, 93%, 94%, 95%,91%,4h 反而是最低的。。 8-96小时还有起伏。。
4楼2011-06-13 09:00:40
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