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Iron (Fe) is known to be necessary for cellular proliferation. Previous studies have suggested that neuroblastoma cells appear to be relatively sensitive to growth inhibition by a specific Fe chelator, deferrioxamine (DFO), in vitro. Also, DFO has been recently used for the treatment of neuroblastoma patients. In this paper we demonstrate that neuroblastoma(More)
A number of N-linked membrane glycoproteins are induced during chick oviduct differentiation. We have purified a major estrogen-inducible glycoprotein (Mr = 91,000) to homogeneity by preparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Comparison of partial NH2-terminal sequence data with membrane glycoproteins having similar Mr showed a(More)
To elucidate the roles of cyclin-dependent kinase 6 (cdk6) in T cells, we examined its intracellular localization, kinase activity, and associated proteins in the Jurkat T lymphoblastoid cell line. Jurkat cells had a high level of cdk6, which was associated with cyclin D3, but not cyclin D2, the member of the cyclin D family. When stimulated by a(More)
A previously described transferrin binding protein from chicken oviduct has been identified as a heat shock protein, HSP108, by microsequencing of RP-HPLC purified tryptic peptides. The protein purified from oviduct by SDS-PAGE or from liver by ovotransferrin-affinity chromatography reacts with a monoclonal antibody raised against HSP108. The cDNA sequence(More)
Many defects in cancer cells are in molecules regulating G(1)-phase cyclin-dependent kinases (cdks), which are responsible for modulating the activities of Rb family growth-suppressing proteins. Models for understanding how such defects affect proliferation assume that cdks are responsible for sequentially phosphorylating, and hence inactivating, the(More)
Regulation of dolichyl phosphate-linked oligosaccharide assembly has been studied during the course of diethylstilbestrol-induced chick oviduct differentiation. Oviduct membranes from treated chicks form 4.6 times as much GlcNAc-P-P-Dol and GlcNAc2-P-P-Dol upon incubation with UDP-[14C]GlcNAc and MgCl2 than do membranes from untreated chicks. Assembly of(More)
BACKGROUND An important aspect of the innate immune response to pathogens is the production of anti-microbial peptides such as cathelicidin-related antimicrobial peptide (CRAMP), the murine homologue of human cathelicidin LL-37. In this study, mechanisms regulating LPS-induction of CRAMP gene expression in mast cells were investigated. NF-kappaB and MAPK(More)
RATIONALE Spleen tyrosine kinase (Syk) is important for Fc and B-cell receptor-mediated signaling. OBJECTIVE To determine the activity of a specific Syk inhibitor (R406) on mast cell activation in vitro and on the development of allergen-induced airway hyperresponsiveness (AHR) and inflammation in vivo. METHODS AHR and inflammation were induced after 10(More)
The effects of rapamycin (RAP) on cell cycle progression of human T cells stimulated with PHA were examined. Cell cycle analysis showed that the RNA content of cells stimulated with PHA in the presence of RAP was similar to that of control T cells stimulated with PHA for 12-24 hr in the absence of the drug. This level was substantially higher than that seen(More)
Allergic asthma is a heterogeneous inflammatory disorder of the airways characterized by chronic airway inflammation and airway hyperresponsiveness. Numbers of CD8(+)IL-13(+) T cells are increased in asthmatics and during the development of experimental asthma in mice. In an atopic environment rich in IL-4, these CD8(+) T cells mediate asthmatic responses,(More)