formazans and Leukemia--T-Cell

formazans has been researched along with Leukemia--T-Cell* in 2 studies

Other Studies

2 other study(ies) available for formazans and Leukemia--T-Cell

Article	Year
Enhanced MTT-reducing activity under growth inhibition by resveratrol in CEM-C7H2 lymphocytic leukemia cells. Cancer letters, 2003, Jun-10, Volume: 195, Issue:2 Inhibition of proliferation by resveratrol of CEM-C7H2 lymphocytic leukemia cells was paradoxically associated with an enhanced cellular 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT)-reducing activity. This phenomenon was most pronounced at the sub-apoptotic concentration range of 5-20 microM resveratrol. The results of our study show that the MTT-reducing activity can be increased by the polyphenolic antioxidant resveratrol without a corresponding increase in the number of living cells and that this occurs at a concentration range of the antioxidant which is not sufficient to induce apoptosis but suffices to slow down cell growth. This phenomenon appears to be restricted to proliferation inhibitors with antioxidant properties and is cell type-specific. Thus, in determining the effects of flavonoids and polyphenols on proliferation, in certain cell types this might represent a pitfall in the MTT proliferation assay. Topics: Antioxidants; Apoptosis; Artifacts; Cell Division; Colorimetry; Dose-Response Relationship, Drug; Electron Transport; Formazans; Growth Inhibitors; Histocytochemistry; Humans; Indicators and Reagents; Leukemia, T-Cell; Mitochondria; NAD; NADP; Organ Specificity; Oxidation-Reduction; Resveratrol; Stilbenes; Subcellular Fractions; T-Lymphocytes; Tetrazolium Salts; Thiazoles; Tumor Cells, Cultured	2003
Determination of IL-2 and cytotoxicity of killer cells in MTT colorimetry. Journal of Tongji Medical University = Tong ji yi ke da xue xue bao, 1993, Volume: 13, Issue:3 The activity of interleukin 2 (IL-2) in culture supernatants of lymphokine-activated killer (LAK) cells and tumor infiltrating lymphocytes (TIL) as well as cytotoxicity of LAK cells on cultured leukemic cells were determined by MTT colorimetry. The results showed that higher activity of IL-2 in culture supernatant of LAK and TIL cells was found; it could be used to support the culture of IL-2 dependent cell lines. The significant cytotoxicity of LAK cells on leukemic cell lines could be found in vitro, and it was consistent with the ratio of effector cells to target cells. The number of living leukemic cells is consistently related with the concentration of formazan metabolite of MTT. It suggested that the numbers of living cells and cytotoxicity of LAK cells could be estimated by determination of formazan metabolite OD value. Topics: Colorimetry; Cytotoxicity, Immunologic; Formazans; Humans; Interleukin-2; Killer Cells, Lymphokine-Activated; Leukemia, B-Cell; Leukemia, T-Cell; Lymphocytes, Tumor-Infiltrating; Tetrazolium Salts; Thiazoles; Tumor Cells, Cultured	1993

Article

Year

Enhanced MTT-reducing activity under growth inhibition by resveratrol in CEM-C7H2 lymphocytic leukemia cells.

Cancer letters, 2003, Jun-10, Volume: 195, Issue:2

Inhibition of proliferation by resveratrol of CEM-C7H2 lymphocytic leukemia cells was paradoxically associated with an enhanced cellular 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT)-reducing activity. This phenomenon was most pronounced at the sub-apoptotic concentration range of 5-20 microM resveratrol. The results of our study show that the MTT-reducing activity can be increased by the polyphenolic antioxidant resveratrol without a corresponding increase in the number of living cells and that this occurs at a concentration range of the antioxidant which is not sufficient to induce apoptosis but suffices to slow down cell growth. This phenomenon appears to be restricted to proliferation inhibitors with antioxidant properties and is cell type-specific. Thus, in determining the effects of flavonoids and polyphenols on proliferation, in certain cell types this might represent a pitfall in the MTT proliferation assay.

Topics: Antioxidants; Apoptosis; Artifacts; Cell Division; Colorimetry; Dose-Response Relationship, Drug; Electron Transport; Formazans; Growth Inhibitors; Histocytochemistry; Humans; Indicators and Reagents; Leukemia, T-Cell; Mitochondria; NAD; NADP; Organ Specificity; Oxidation-Reduction; Resveratrol; Stilbenes; Subcellular Fractions; T-Lymphocytes; Tetrazolium Salts; Thiazoles; Tumor Cells, Cultured

2003

Determination of IL-2 and cytotoxicity of killer cells in MTT colorimetry.

Journal of Tongji Medical University = Tong ji yi ke da xue xue bao, 1993, Volume: 13, Issue:3

The activity of interleukin 2 (IL-2) in culture supernatants of lymphokine-activated killer (LAK) cells and tumor infiltrating lymphocytes (TIL) as well as cytotoxicity of LAK cells on cultured leukemic cells were determined by MTT colorimetry. The results showed that higher activity of IL-2 in culture supernatant of LAK and TIL cells was found; it could be used to support the culture of IL-2 dependent cell lines. The significant cytotoxicity of LAK cells on leukemic cell lines could be found in vitro, and it was consistent with the ratio of effector cells to target cells. The number of living leukemic cells is consistently related with the concentration of formazan metabolite of MTT. It suggested that the numbers of living cells and cytotoxicity of LAK cells could be estimated by determination of formazan metabolite OD value.

Topics: Colorimetry; Cytotoxicity, Immunologic; Formazans; Humans; Interleukin-2; Killer Cells, Lymphokine-Activated; Leukemia, B-Cell; Leukemia, T-Cell; Lymphocytes, Tumor-Infiltrating; Tetrazolium Salts; Thiazoles; Tumor Cells, Cultured

1993