Cell density and solvent are critical parameters affecting formazan evaluation in MTT assay



Document title: Cell density and solvent are critical parameters affecting formazan evaluation in MTT assay
Journal: Brazilian archives of biology and technology
Database: PERIÓDICA
System number: 000373464
ISSN: 1516-8913
Authors: 1
1
1
1
Institutions: 1Universidade de Sao Paulo, Faculdade de Odontologia de Bauru, Bauru, Sao Paulo. Brasil
Year:
Season: May-Jun
Volumen: 57
Number: 3
Pages: 381-385
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Analítico, descriptivo
English abstract The aim of this study was to establish the more accurate protocol for fibroblast cell viability using MTT assay. NIH/3T3 fibroblasts were seeded at the following cell densities: 3.125x103; 1.156x104; 3.125x104; 1.156x105 and 3.125x105 cells/cm2. Following 24h of seeding, MTT was added to the wells. After 4h of the MTT addition, different solvents were added to solubilize the formazan crystals: 1) HCl/SDS group- 20% SDS and 0.01 M HCl; 2) EtOH/ HAc group-50% ethanol and 1% acetic acid; 3) DMSO group- 99.5% dimethyl sulfoxide; and 4) PropOH group- 99.5% isopropanol. The absorbance values were measured using a spectrophotometer at 570 nm. The data were analyzed by 2-way ANOVA (p<0.05) and showed that the absorbance average varied according to the number of cells and solvents: HCl/SDS (0 to 0.13), EtOH/HAc (0 to 0.22), DMSO (0.76 to 1.31) and PropOH (0.66 to 1.04). The DMSO and PropOH groups presented the most appropriate protocols for NIH/3T3 fibroblasts cell viability, especially at the density of 1.156x104 cells/cm2
Disciplines: Biología
Keyword: Biología celular,
Cultivo de células,
Fibroblastos,
Viabilidad de células,
Densidad celular,
Bioensayos
Keyword: Biology,
Cell biology,
Cell culture,
Fibroblasts,
Cell viability,
Cell density,
Bioassays
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