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Cell Meter™ Cell Viability Assay Kit *NIR Fluorescence Optimized for Fluorescence Microplate Reader*

CHO-K1 cell number response was measured with Cell Meter™ Cell Viability Assay Kit. CHO-K1 cells at 0 to 50,000 cells/well/100 µL were seeded overnight in a Costar black wall/clear bottom 96-well plate. The cells were incubated with 100 µL/well of CytoCalcein™ NIR dye-working solution for 1 hour at room temperature. The fluorescence intensity was measured at Ex/Em = 635/670 nm (Cutoff = 665 nm) with FlexStation™ microplate reader (Molecular Devices).
CHO-K1 cell number response was measured with Cell Meter™ Cell Viability Assay Kit. CHO-K1 cells at 0 to 50,000 cells/well/100 µL were seeded overnight in a Costar black wall/clear bottom 96-well plate. The cells were incubated with 100 µL/well of CytoCalcein™ NIR dye-working solution for 1 hour at room temperature. The fluorescence intensity was measured at Ex/Em = 635/670 nm (Cutoff = 665 nm) with FlexStation™ microplate reader (Molecular Devices).
CHO-K1 cell number response was measured with Cell Meter™ Cell Viability Assay Kit. CHO-K1 cells at 0 to 50,000 cells/well/100 µL were seeded overnight in a Costar black wall/clear bottom 96-well plate. The cells were incubated with 100 µL/well of CytoCalcein™ NIR dye-working solution for 1 hour at room temperature. The fluorescence intensity was measured at Ex/Em = 635/670 nm (Cutoff = 665 nm) with FlexStation™ microplate reader (Molecular Devices).
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H-phraseH303, H313, H333
Hazard symbolXN
Intended useResearch Use Only (RUO)
R-phraseR20, R21, R22
UNSPSC12352200
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OverviewpdfSDSpdfProtocol


Our Cell Meter™ assay kits are a set of tools for monitoring cell viability. There are a variety of parameters that can be used for monitoring cell viability. This kit uses a proprietary dye that gets enhanced fluorescence upon entering into live cells. The dye is a hydrophobic compound that easily permeates intact live cells. The hydrolysis of the weakly fluorescent substrate by intracellular esterases generates a strongly fluorescent hydrophilic product that is well-retained in the cell cytoplasm. The esterase activity is proportional to the number of viable cells, and thus directly related to the fluorescence intensity of the product generated from the esterase-catalyzed hydrolysis of the fluorogenic substrate. Cells grown in black-walled plates can be stained and quantified in less than two hours. The assay is more robust than the tetrazolium salt or Alarmar Blue™-based assays. It can be readily adapted for high-throughput assays in a wide variety of fluorescence platforms such as microplate assays, immunocytochemistry and flow cytometry. It is useful for a variety of studies, including cell adhesion, chemotaxis, multidrug resistance, cell viability, apoptosis and cytotoxicity. The kit provides all the essential components with an optimized cell-labeling protocol. It is suitable for proliferating and non-proliferating cells, and can be used for both suspension and adherent cells. Using 100 uL of reagents per well in a 96-well format, this kit provides sufficient reagents to perform 200 assays. Using 25 uL of reagents per well in a 384-well format, this kit provides sufficient reagents to perform 800 assays.

Platform


Fluorescence microplate reader

Excitation635 nm
Emission670 nm
Cutoff665 nm
Recommended plateBlack wall/clear bottom
Instrument specification(s)Bottom read mode

Components


Example protocol


AT A GLANCE

Protocol summary

  1. Prepare cells with test compounds
  2. Remove the medium
  3. Add CytoCalcein™ NIR working solution (100 µL/well/96-well plate or 25 µL/well/384-well plate)
  4. Incubate at room temperature or 37°C for 1 hr
  5. Read fluorescence intensity (bottom read mode) at Ex/Em = 635/670 nm (Cutoff = 665 nm) 

Important notes
Thaw one of each kit component at room temperature before starting the experiment.

PREPARATION OF STOCK SOLUTION

Unless otherwise noted, all unused stock solutions should be divided into single-use aliquots and stored at -20 °C after preparation. Avoid repeated freeze-thaw cycles.

1. CytoCalcein™ NIR stock solution:
Add 20 µL of DMSO (Component B) into the vial of CytoCalcein™ NIR (Component A) and mix them well to make CytoCalcein™ NIR stock solution. Note: 20 µL of CytoCalcein™ NIR stock solution is enough for one plate. Protect from light. For storage, seal tubes tightly.

PREPARATION OF WORKING SOLUTION

Add 20 µL of CytoCalcein™ NIR stock solution into the bottle of Assay Buffer (10 mL, Component C) and mix well to make CytoCalcein™ NIR working solution. Note: This CytoCalcein™ NIR working solution is for one cell plate and stable for at least 2 hours at room temperature.

SAMPLE EXPERIMENTAL PROTOCOL

Cells Preparation:

Plate 100 to 100,000×10 cells per well in a tissue culture microplate with black wall and clear bottom. Add test compounds into the cells and incubate for a desired period of time (such as 24, 48 or 96 hours) in a 37 °C, 5% CO2 incubator.

For blank wells (medium without the cells), add the same amount of compound buffer. The suggested total volume is 100 µL/well/96-well plate, and 25 µL/well/384-well plate. Note: Each cell line should be evaluated on the individual basis to determine the optimal cell density for proliferation or cytotoxicity induction. For proliferation assays, use fewer cells; for cytotoxicity assays, use more cells to start with.

Sample Protocol:

  1. Treat cells with test compounds as desired. Note: It is not necessary to wash cells before adding compound. However, if tested compounds are serum sensitive, growth medium and serum factors can be aspirated away before adding compounds. Add 100 µL/well (96-well plate) and 25 µL/well (384-well plate) of 1X Hank’s salt solution and 20 mM Hepes buffer (HHBS) or the buffer of your choice after aspiration. Alternatively, cells can be grown in serum-free media.

  2. Remove the medium from the cells. Note: Medium must be removed before loading CytoCalcein™ NIR working solution.

  3. Add 100 µL/well (96-well plate) or 25 µL/well (384-well plate) of CytoCalcein™ NIR working solution.

  4. Incubate plate at room temperature or 37°C for 1 hour, protected from light. Note: The appropriate incubation time depends on the individual cell type and cell concentration used. Optimize the incubation time for each experiment. For non-adherent cells, it is recommended to centrifuge cell plates at 800 rpm for 2 minutes with brake off after incubation.

  5. Monitor the fluorescence intensity with a fluorescence plate reader (bottom read mode) at Ex/Em = 635/670 nm (Cutoff = 665 nm).

Product Family


Images


Citations


View all 17 citations: Citation Explorer
Functional imaging of neuronal activity of auditory cortex by using Cal-520 in anesthetized and awake mice
Authors: Li, Jingcheng and Zhang, Jianxiong and Wang, Meng and Pan, Junxia and Chen, Xiaowei and Liao, Xiang
Journal: Biomedical Optics Express (2017): 2599--2610
NINJ2--A novel regulator of endothelial inflammation and activation
Authors: Wang, Jingjing and Fa, Jingjing and Wang, Pengyun and Jia, Xinzhen and Peng, Huixin and Chen, Jing and Wang, Yifan and Wang, Chenhui and Chen, Qiuyun and Tu, Xin and others, undefined
Journal: Cellular Signalling (2017)
Influence of hypothermia and subsequent rewarming upon leukocyte-endothelial interactions and expression of Junctional-Adhesion-Molecules A and B
Authors: Bogert, Nicolai V and Werner, Isabella and Kornberger, Angela and Meybohm, Patrick and Moritz, Anton and Keller, Till and Stock, Ulrich A and Beiras-Fern, undefined and ez, Andres
Journal: Scientific reports (2016)
Inhibition of ABC transport proteins by oil sands process affected water
Authors: Alharbi, Hattan A and Saunders, David MV and Al-Mousa, Ahmed and Alcorn, Jane and Pereira, Alberto S and Martin, Jonathan W and Giesy, John P and Wiseman, Steve B
Journal: Aquatic Toxicology (2016): 81--88
Rapid generation of collagen-based microtissues to study cell--matrix interactions
Authors: Brett, Marie-Elena and Crampton, Alex and ra L , undefined and Wood, David K
Journal: Technology (2016): 1--8
Toxicokinetics and toxicodynamics of chlorpyrifos is altered in embryos of Japanese medaka exposed to oil sands process-affected water: evidence for inhibition of P-glycoprotein
Authors: Alharbi, Hattan A and Alcorn, Jane and Al-Mousa, Ahmed and Giesy, John P and Wiseman, Steve B
Journal: Journal of Applied Toxicology (2016)
Flexible Endoscopic Spray Application of Respiratory Epithelial Cells as Platform Technology to Apply Cells in Tubular Organs
Authors: Thiebes, Anja Lena and Reddemann, Manuel Armin and Palmer, Johannes and Kneer, Reinhold and Jockenhoevel, Stefan and Cornelissen, Christian Gabriel
Journal: Tissue Engineering Part C: Methods (2016): 322--331
Erythropoietin Stimulates Endothelial Progenitor Cells to Induce Endothelialization in an Aneurysm Neck After Coil Embolization by Modulating Vascular Endothelial Growth Factor
Authors: Liu, Peixi and Zhou, Yingjie and An, Qingzhu and Song, Yaying and Chen, Xi and Yang, Guo-Yuan and Zhu, Wei
Journal: MEDICINE (2016): 1--8
Spraying respiratory epithelial cells to coat tissue-engineered constructs
Authors: Thiebes, Anja Lena and Albers, Stefanie and Klopsch, Christian and Jockenhoevel, Stefan and Cornelissen, Christian G
Journal: BioResearch open access (2015): 278--287
Visualization of adherent cell monolayers by cryo-electron microscopy: A snapshot of endothelial adherens junctions
Authors: Le Bihan, Olivier and Decossas, Marion and Gontier, Etienne and Gerbod-Giannone, Marie-Christine and Lambert, Olivier
Journal: Journal of structural biology (2015): 470--477

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