计算溶液所需的质量、体积或浓度。
BioReagent,无菌,用于细胞培养 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
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在色谱分析、有机合成和交叉偶联反应领域已被 1083 篇同行评审文献引用。
MTT比色法是一种检测细胞存活和生长的方法。MTT检测原理在于活细胞线粒体中的琥珀酸脱氢酶能使外源性MTT还原为水不溶性的蓝紫色甲瓒并沉积在细胞中,而死细胞无此功能。在特定溶剂DMSO存在的情况下,甲瓒可以被完全溶解。然后通过酶标仪可以测定波长 (490 nm或570 nm)附近的吸光度。细胞增殖越多越快,则吸光度越高;细胞毒性越大,则吸光度越低。
使用方法
1、收集培养至对数生长期的细胞,常规胰蛋白酶消化液消化细胞 (悬浮细胞无需消化)。
2、低速离心,收集细胞沉淀。用培养液重悬细胞沉淀,制备成单细胞悬液,并计数。
3、细胞接种于96孔培养板,每孔体积200 μL,一般接种密度为3000-10000/孔。96孔板边缘用无菌PBS或水填充,同时设置调零孔 (培养基、MTT、DMSO),对照孔 (细胞、相同浓度的药物溶解介质、培养液、MTT、DMSO)。
4、5%CO2,37℃培养细胞至处理结束后,每孔加入5 mg/mL MTT溶液20 μL,继续培养4h (若培养液中含能与MTT反应的成分,则需要去除培养液并用无菌PBS洗涤2-3次后再加入MTT溶液)。
5、终止培养,小心吸去孔内培养液,对于悬浮细胞需要离心后再吸弃培养上清。
6、每孔加入150μL 二甲基亚砜 (DMSO),置摇床上低速震荡10 min,使结晶充分融解。
7、选择490 nm波长,在酶联免疫检测仪上测定各孔的吸光值,并记录结果。
注意事项
1、MTT 溶液 (5 mg/mL)尽量减少反复冻融,以免失效,当颜色变为灰绿色时,请勿使用。
2、使用96孔板进行检测时,如果细胞培养时间较长,应注意蒸发问题。
3、MTT溶液在低温情况下会凝固,使用前请置于室温或20-25℃水浴至全部融解后使用。
4、观察甲瓒是否完全溶解,亦可以借助光学显微镜观察。
5、培养细胞时尽量避免细菌污染。
6、为了您的安全和健康,请穿实验服并戴一次性手套操作。
7、本产品仅用于科研实验,禁止他用。
Product Introduction
The MTT colorimetric method is a technique for detecting cell viability and proliferation. The principle of the MTT assay is that succinate dehydrogenase in the mitochondria of viable cells can reduce exogenous MTT to water-insoluble blue-purple formazan, which then deposits inside the cells; this reaction does not occur in dead cells. In the presence of dimethyl sulfoxide (DMSO), a specific solvent, formazan can be completely dissolved. Subsequently, the absorbance can be measured at wavelengths around 490 nm or 570 nm using a microplate reader. The higher the cell proliferation rate and quantity, the higher the absorbance value; conversely, the stronger the cytotoxicity, the lower the absorbance value.
Usage Instructions
1. Collect cells cultured to the logarithmic growth phase, and digest the cells with a routine trypsin solution (digestion is not required for suspension cells).
2. Perform low-speed centrifugation to collect the cell pellet. Resuspend the cell pellet in the culture medium to prepare a single-cell suspension, and then count the cells.
3. Seed the cells into a 96-well culture plate with a volume of 200 μL per well; the recommended seeding density is generally 3,000-10,000 cells per well. Fill the edge wells of the 96-well plate with sterile PBS or water. Meanwhile, set up zero-adjustment wells (containing culture medium, MTT, and DMSO) and control wells (containing cells, drug dissolution medium of the same concentration, culture medium, MTT, and DMSO).
4. Incubate the cells at 37 °C in a 5% CO₂ atmosphere until the end of the treatment. Add 20 μL of 5 mg/mL MTT solution to each well and continue incubation for 4 hours. (If the culture medium contains components that can react with MTT, remove the culture medium and wash the cells 2-3 times with sterile PBS before adding the MTT solution.)
5. Terminate the culture and carefully aspirate the culture medium from each well. For suspension cells, perform centrifugation before aspirating the culture supernatant.
6. Add 150 μL of dimethyl sulfoxide (DMSO) to each well, and shake the plate at low speed on a shaker for 10 minutes to ensure complete dissolution of the formazan crystals.
7. Select a wavelength of 490 nm, measure the absorbance value of each well using an enzyme-linked immunosorbent assay (ELISA) reader, and record the results.
Precautions
1. Minimize repeated freeze-thaw cycles of the 5 mg/mL MTT solution to prevent inactivation. Do not use the solution if it turns grayish-green.
2. When conducting the assay using a 96-well plate, pay attention to the issue of evaporation if the cell culture period is prolonged.
3. MTT solution may solidify at low temperatures. Before use, place it at room temperature or in a 20-25 °C water bath until it is completely dissolved.
4. An optical microscope can be used to check whether the formazan has been completely dissolved.
5. Avoid bacterial contamination as much as possible during cell culture.
6. For your safety and health, wear a lab coat and disposable gloves during operation.
7. This product is for research use only and is prohibited for any other purposes.
H315: 引起皮肤刺激
H319: 引起严重眼睛刺激
H335: 可能引起呼吸道刺激
H341: 怀疑引起遗传缺陷
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾
P305+P351+P338: 如进入眼睛:用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出,取出隐形眼镜。继续冲洗。
P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。
P302+P352: 如皮肤沾染:用水充分清洗。
P321: 特殊处理(请参阅此标签上的...)。
P405: 密闭存放
P501: 将内容物/容器处理到。。。
P264: 处理后要彻底洗手。
P281: 根据需要使用个人防护设备。
P271: 仅在室外或通风良好的地方使用。
P304+P340: 如误吸入:将人转移到空气新鲜处,保持呼吸舒适体位。
P403+P233: 存放在通风良好的地方。保持容器密闭。
P362+P364: 脱掉沾污的衣服,清洗后方可重新使用。
P203: 使用前,获取、阅读并遵守所有安全说明。
P264+P265: 处理后彻底洗手[和…]。不要触摸眼睛。
P318: 如果暴露或担心,请就医。
P337+P317: 如果眼睛刺激持续:寻求医疗帮助。
P332+P317: 如果出现皮肤刺激:请寻求医疗帮助。
P319: 如果你感到不适,请寻求医疗帮助。
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| 批号(Lot Number) | 证书类型 | 货号 |
|---|---|---|
| 分析证书 | M1509558 | |
| 分析证书 | M1509558 | |
| 分析证书 | M1509558 | |
| 分析证书 | M1509558 |
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