Cell cytotoxicity / Proliferation assay cell type - oral squamous cell carcinoma

Cell cytotoxicity assays measure the ability of certain compounds or chemical mediators to reduce the viability of the cells. The term cell cytotoxicity assay can sometimes be used interchangeably with cell proliferation assay. Healthy living cells can be identified by the use of formazan dyes, protease biomarkers or by measuring ATP content. The formazan dyes are chromogenic products formed by the reduction of tetrazolium salts by dehydrogenases, such as lactate dehydrogenase (LDH) and reductases that are released during cell death. Common tetrazolium salts include INT, MTT, MTS and XTT. Cell cytotoxicity can also be measured by using the SRB and WST-1 assays. These assays can usually be used in a high-throughput fashion and can be quantitated by measuring absorbance, colorimetry or luminescence. All these assays require similar numbers of cell plating at the initiation, a time course of treatment with the cytotoxic agent and at least triplicates for each condition at every point of analysis. Cell shrinkage, plasma membrane blebbing, cell detachment, externalization of phosphatidylserine, nuclear condensation and ultimately DNA fragmentation are well-described features of apoptosis. The assays that rely on cell membrane integrity for their function, may not be able to quantify early apoptosis. Therefore, in order to distinguish early apoptotic vs. late apoptotic or necrotic cells, additional flow cytometry techniques can be used. A combination of Annexin V and PI (propidium iodide) can be used to distinguish early (Annexin V+/PI-) and late apoptotic (Annexin V+/PI+) cells. Sometimes, caspase assays are used in order to differentiate the stages of apoptosis.

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Found 2 matching solutions for this experiment

PCNA Antibody (F-2)

Santa Cruz Biotechnology

Protocol tips
Our specimens had been fixed with formalin from 24 to 48 h at room temperature and treated with routine processing as in a previous study (12). Ten 4-mm serial sections were prepared for staining and were incubated with primary antibodies for 2 h. Immunohistochemistry was performed using a Discovery Auto-Stainer with automated protocols (Ventana Medical Systems, Inc.; Roche) as previously described (13). The average number of PCNA-positive cells from case 1 to case 23 were counted in 10 random microscopic fields at 400 magnification.
Upstream tips
- 3000 cells/well were seeded on a 96 well plate.

These cells were pretreated /transfected with miR-143 mimic, or control mimic for 48 h
Protocol tips
- Cellls were treated with MTT at 50 mg per well
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