demecolcine/leukæmi

The stimulation of the rat basophilic leukemia cells (RBL-2H3) mediated either through the IgE receptor or by the Ca2+ ionophore A23187 results in 45Ca2+ influx, phospholipase activation, and histamine release. This study compared in parallel the effects of pharmacological agents on 45Ca2+ influx,

Cytoplasmic elongation and rupture in megakaryoblastic leukemia cells via activation of adhesion and motility by staurosporine on fibronectin-bound substratum.

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Human megakaryoblastic leukemia Meg-01 cells were attached to fibronectin (FN)-coated substratum, on which remarkable spreading and cytoplasmic elongation was induced by treatment with a protein kinase inhibitor, staurosporine (stp). This effect was inhibited by RGDS and was also not seen on

Effect of deuterium oxide (D2O) on the IgE-mediated Ca2+ influx, arachidonic acid and histamine release in rat basophilic leukemia cells.

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Deuterium oxide (D2O), which is known to stimulate microtubule aggregation, enhanced the IgE-mediated 45Ca2+ influx, (14C)-arachidonic acid and histamine release in rat basophilic leukemia cells (RBL-2H3) in the same dose-dependent manner (up to 90% (v/v]. We compared the interaction between D2O and

Biological effects of modified colchicines. Improved preparation of 2-demethylcolchicine, 3-demethylcolchicine, and (+)-colchicine and reassignment of the position of the double bond in dehydro-7-deacetamidocolchicines.

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A variety of colchicine, demecolcine, and isocolchicine derivatives were examined for their potency in the lymphocytic leukemia P388 screen in mice, for their toxicity in mice, and for their binding to microtubule protein. A qualitatively direct correlation was found between in vivo potency and

The growth-regulatory role of B-cell-specific activator protein in NZB malignant B-1 cells.

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The transcription factor B-cell-specific activator protein (BSAP) plays an important role in B-cell development. We explored the involvement of BSAP in the growth regulation of malignant B-1 cells derived from the NZB murine model of human chronic lymphocytic leukemia. BSAP protein was found in

Proteins IEF (isoelectric focusing) 31 and IEF 46 are keratin-type components of the intermediate-sized filaments: keratins of various human cultured epithelial cells.

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Mouse polyclonal antibodies have been raised against two human proteins (IEF [isoelectric focusing] 31, Mr = 50,000; IEF 46, Mr = 43,500) that have previously been shown to be present in HeLa cytoskeletons enriched in intermediate-sized filaments. Immunoprecipitation studies show that both proteins

Adhesion of U-937 monocytes induces cytotoxic damage and subsequent proliferation of cultured human mesangial cells.

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In an in vitro model of monocyte adhesion to glomerular cells, U-937 myelomonocytic leukemia cells irreversibly bind to human mesangial cell monolayers. Adhesion is enhanced in mesangial cells proliferating in response to fetal bovine serum, and in the presence of several cytokines and vasoactive

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