نتایج جستجو برای: a23187

تعداد نتایج: 2164  

Journal: :Bioscience reports 1990
S Altiok E Bermek

The treatment of human tonsillar T-lymphocytes with 4-phorbol 12-myristate 13-acetate (PMA), resulted in about two fold increase in glucocorticoid receptor (GR) number, without any significant change in the receptor affinity. This increase disappeared in the presence of cycloheximide. Alone, PMA and calcium ionophore A23187 did not affect, but together stimulated, like phytohaemagglutinin (PHA)...

Journal: :The Journal of antibiotics 1976
M O Chaney N D Jones M Debono

The crystal and molecular structures of the calcium complex of A23187 has been determined by X-ray diffraction studies.

Journal: :The Journal of Cell Biology 1982
M Edidin T Wei L Gotlib

In mouse-human heterokaryons, the lateral diffusion of major histocompatibility (MHC) antigens in the plasma membrane is enhanced by treatment of parent cells with ouabain. Ouabain treatment is ineffective if the medium lacks calcium ion, or if Verapamil, a blocker of calcium channels, is present. The divalent ionophore A23187 also enhances lateral diffusion of MHC antigens, to the same extent ...

Journal: :Mediators of Inflammation 1994
A. J. M. Van Oosterhout A. Van Der Poel L. Koenderman D. Roos F. P. Nijkamp

Interleukin-5 (IL-5) has been shown to be a selective eosinophil growth and differentiation factor. In the present study, the effect of recombinant human IL-5 on human eosinophil sulfidopeptide leukotriene production was investigated. IL-5 did not affect leukotriene synthesis in unstimulated eosinophils. However, IL-5 potentiated leukotriene synthesis by eosinophils stimulated with serum treate...

Journal: :Clinical immunology and immunopathology 1991
D Atluru T M Jackson S Atluru

In this study, genistein, a selective protein tyrosine kinase (PTK) inhibitor, inhibited peripheral blood mononuclear cell (PBMC) proliferation and interleukin-2 production from cultures that were stimulated with phytohemagglutinin (PHA), phorbol 12-myristate 13-acetate (PMA) plus A23187, or PHA plus PMA, and genistein effectively blocked the PHA plus IL-2-induced PBMC proliferation. Further, w...

Journal: :The Biochemical journal 1985
M D Brand

Rat heart mitochondria respiring on succinate in the presence of Ruthenium Red (to inhibit uptake on the Ca2+ uniporter) released Ca2+ on the calcium/sodium antiporter until a steady state was reached. Addition of the ionophore A23187 (which catalyses Ca2+/2H+ exchange) did not perturb this steady state. Thermodynamic analysis showed that if a Ca2+/nNa+ exchange with any value of n other than 2...

Journal: :The Biochemical journal 1992
E R Roldan R A Harrison

When ram spermatozoa were treated with Ca2+ and the ionophore A23187 to induce acrosomal exocytosis, a rise in diacylglycerol (DAG) mass was observed, concomitant with a rapid breakdown of [32P]P1-labelled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate and a rise in [32P]Pi-labelled phosphatidate. Inclusion of the DAG lipase inhibitor RHC 80267 resulted in further bu...

Journal: :The European respiratory journal 1991
P Lassalle Y Delneste P Gosset B Wallaert A B Tonnel J P Dessaint A Capron

The purpose of this study was to investigate a possible relationship between human umbilical vein endothelial cells (EC) triggered by ionophore A23187 at different doses (0.5-2.5 microM) and polymorphonuclear neutrophils (PMN). EC supernatants were shown to contain neutrophil chemoattractant activity (NCA) and in parallel a factor inducing an inhibition of PMN chemiluminescence (PMN CL). Supern...

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