The MTT assays of bovine retinal pericytes and human microvascular endothelial cells on DLC and Si-DLC-coated TCPS

Journal of Biomedical Materials Research. Part a
T I T OkpalugoN M D Brown

Abstract

MTT (Tetrazolium)-assay suggests that diamond-like carbon (DLC) and silicon-doped DLC (Si-DLC) films obtained under appropriate deposition parameters are not toxic to bovine retinal pericytes, and human microvascular endothelial cells (HMEC). The observed frequency distributions of the optical density (OD) values indicative of cell viability are near Gaussian-normal distribution. One-way ANOVA indicates that at 0.05 levels the population means are not significantly different for the coated and control samples. The observed OD values depend on the cell line (cell growth/metabolic rate), possibly cell cycle stage, the deposition parameters-bias voltage, ion energy, pressure, argon precleaning, and the dopant. For colored thin films like DLC with room temperature photoconductivity and photoelectric effects, it is important to account for the OD contribution from the coating itself. MTT assay, not surprisingly, seems not to be highly sensitive to interfacial cellular interaction resulting from the change in the film's nanostructure, because the tetrazolium metabolism is mainly intracellular and not interfacial. The thin films were synthesized by 13.56 MHz RF-PECVD using argon and acetylene as source gases, with tetramethylsilane (T...Continue Reading

Citations

Mar 25, 2008·Biomaterials·Stephen KellyFrederik Claeyssens
Sep 20, 2007·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·A A OgwuJ A D McLaughlin
Apr 5, 2021·Materials Science & Engineering. C, Materials for Biological Applications·A S GrenadyorovI A Khlusov
May 23, 2008·Acta Biomaterialia·Feng ChaiHartmut F Hildebrand

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