formazans and Leukemia--Basophilic--Acute

formazans has been researched along with Leukemia--Basophilic--Acute* in 1 studies

Other Studies

1 other study(ies) available for formazans and Leukemia--Basophilic--Acute

Article	Year
Inhibitory effect of fulvic acid extracted from Canadian sphagnum peat on chemical mediator release by RBL-2H3 and KU812 cells. Bioscience, biotechnology, and biochemistry, 2007, Volume: 71, Issue:5 Fulvic acid (FA) was extracted and purified from Canadian Sphagnum peat (CP-FA) and characterized by using an element analysis meter, Fourier transform infrared (FT-IR) spectroscopy, electron spin resonance (ESR) spectroscopy, and (13)C-nuclear magnetic resonance ((13)C-NMR) spectroscopy. To investigate the antiallergic effect of CP-FA, we incubated rat basophilic leukemia (RBL-2H3) cells with 0.001-10.0 microg/ml of CP-FA and determined the beta-hexosaminidase release inhibition at different response stages. The intracellular calcium [Ca(2+)](i) level was also determined by using Fluo 3-AM, a calcium-specific fluorescent probe, and the cytotoxicity of CP-FA was determined by the 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay. The results revealed that RBL-2H3 cells incubated for 48 h with 0.001-10.0 microg/ml of CP-FA did not show any decreased viability. CP-FA inhibited the beta-hexosaminidase release by IgE-sensitized, antigen-stimulated RBL-2H3 cells at the antigen-antibody binding stage and the antibody-receptor binding stage. CP-FA also inhibited histamine release from A23187 plus PMA- or compound 48/80-stimulated KU812 cells. Furthermore, there was a decrease in the intracellular [Ca(2+)](i) level in IgE-sensitized cells incubated with CP-FA and stimulated with antigen. Our results show that CP-FA may be useful for the treatment or prevention of allergic diseases. Topics: Animals; Anti-Allergic Agents; Antigen-Antibody Complex; Antigens; Basophils; Benzopyrans; beta-N-Acetylhexosaminidases; Calcimycin; Calcium; Cell Line, Tumor; Dose-Response Relationship, Drug; Fluorescent Dyes; Formazans; Histamine Release; Humans; Immunoglobulin E; Ionophores; Leukemia, Basophilic, Acute; Leukemia, Experimental; Leukemia, Myelogenous, Chronic, BCR-ABL Positive; Nuclear Magnetic Resonance, Biomolecular; p-Methoxy-N-methylphenethylamine; Plant Extracts; Rats; Spectroscopy, Fourier Transform Infrared; Sphagnopsida; Tetradecanoylphorbol Acetate; Tetrazolium Salts	2007

Article

Year

Inhibitory effect of fulvic acid extracted from Canadian sphagnum peat on chemical mediator release by RBL-2H3 and KU812 cells.

Bioscience, biotechnology, and biochemistry, 2007, Volume: 71, Issue:5

Fulvic acid (FA) was extracted and purified from Canadian Sphagnum peat (CP-FA) and characterized by using an element analysis meter, Fourier transform infrared (FT-IR) spectroscopy, electron spin resonance (ESR) spectroscopy, and (13)C-nuclear magnetic resonance ((13)C-NMR) spectroscopy. To investigate the antiallergic effect of CP-FA, we incubated rat basophilic leukemia (RBL-2H3) cells with 0.001-10.0 microg/ml of CP-FA and determined the beta-hexosaminidase release inhibition at different response stages. The intracellular calcium [Ca(2+)](i) level was also determined by using Fluo 3-AM, a calcium-specific fluorescent probe, and the cytotoxicity of CP-FA was determined by the 3-(4,5-dimethythiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay. The results revealed that RBL-2H3 cells incubated for 48 h with 0.001-10.0 microg/ml of CP-FA did not show any decreased viability. CP-FA inhibited the beta-hexosaminidase release by IgE-sensitized, antigen-stimulated RBL-2H3 cells at the antigen-antibody binding stage and the antibody-receptor binding stage. CP-FA also inhibited histamine release from A23187 plus PMA- or compound 48/80-stimulated KU812 cells. Furthermore, there was a decrease in the intracellular [Ca(2+)](i) level in IgE-sensitized cells incubated with CP-FA and stimulated with antigen. Our results show that CP-FA may be useful for the treatment or prevention of allergic diseases.

Topics: Animals; Anti-Allergic Agents; Antigen-Antibody Complex; Antigens; Basophils; Benzopyrans; beta-N-Acetylhexosaminidases; Calcimycin; Calcium; Cell Line, Tumor; Dose-Response Relationship, Drug; Fluorescent Dyes; Formazans; Histamine Release; Humans; Immunoglobulin E; Ionophores; Leukemia, Basophilic, Acute; Leukemia, Experimental; Leukemia, Myelogenous, Chronic, BCR-ABL Positive; Nuclear Magnetic Resonance, Biomolecular; p-Methoxy-N-methylphenethylamine; Plant Extracts; Rats; Spectroscopy, Fourier Transform Infrared; Sphagnopsida; Tetradecanoylphorbol Acetate; Tetrazolium Salts

2007