title: Colorimetric evaluation of cultured osteoblast-like cells (ROS 17/2.8).
abstract: We have developed a colorimetric method for evaluating the number of osteoblastic cells in culture without destroying the cells. This assay is based on the staining of basophilic cellular compounds with methylene blue. The dye bound by the cells is released at low pH and measured in a spectrophotometer at 662 nm. Linear correlations exist between the absorbance measured by the methylene blue assay and the number of cells seeded, the total cellular protein content, and thymidine labeling. This colorimetric method has the advantage of preserving cell integrity. After destaining, scanning electron microscopy can be performed on well preserved cell morphology.
authors.affiliation: Osseous Tissue Laboratory-Group for the Interest of Public Exercise, University of Medicine, Saint Etienne, France.
authors.forename: C
authors.initials: C
authors.lastname: Genty
authors.forename: S
authors.initials: S
authors.lastname: Palle
authors.forename: L
authors.initials: L
authors.lastname: Vanelle
authors.forename: S
authors.initials: S
authors.lastname: Bourrin
authors.forename: C
authors.initials: C
authors.lastname: Alexandre
mesh_terms: D000818:Animals; D002452:Cell Count; D003124:Colorimetry / Q000379:methods; D004273:DNA, Neoplasm / Q000096:biosynthesis; D005069:Evaluation Studies as Topic; D008751:Methylene Blue; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological; D009363:Neoplasm Proteins / Q000096:biosynthesis; D055095:Optics and Photonics; D010006:Osteoblasts / Q000166:cytology* / Q000378:metabolism / Q000648:ultrastructure; D012516:Osteosarcoma; D013053:Spectrophotometry; D013936:Thymidine / Q000378:metabolism; D014316:Tritium; D014407:Tumor Cells, Cultured
chemical_list: D004273:DNA, Neoplasm; D009363:Neoplasm Proteins; D014316:Tritium; D008751:Methylene Blue; D013936:Thymidine