MTT分解比色法测定细胞生存和增殖

In 1983, a quantitative colorimetric assay for mammalian cell survival and cell proliferation was proposed by Mosmann.1 The assay is dependent on the reduction of the tetrazolium salt MTT (3-(4,5-dimethylthazol-2-yl)-2,5-diphenyl tetrazolium bromide) by the mitochondrial dehydrogenase of viable cells to form a blue formazan product. The assay measures cell respiration and the amount of formazan produced is proportional to the number of living cells present in culture. The assay has been shown to be a simple, rapid alternative to counting cells by dye inclusion/exclusion, monitoring the release of 51Cr from lysed cells, or the incorporation of [3H]-thymidine into cellular DNA. The MTT assay has been used with a growing number of cell types including primary cultured cells as well as established cell lines. This colorimetric microplate assay is cost effective because of the number of tests which can be performed at one time without the problem of radio-isotope and contaminated materials disposal.