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https://www.readbyqxmd.com/read/21106524/ptb-associated-splicing-factor-psf-functions-as-a-repressor-of-stat6-mediated-ig-epsilon-gene-transcription-by-recruitment-of-hdac1
#1
Lijie Dong, Xinyu Zhang, Xiao Fu, Xianzhi Zhang, Xingjie Gao, Mengyu Zhu, Xinting Wang, ZhenXia Yang, Ole Nørregaard Jensen, Juha Saarikettu, Zhi Yao, Olli Silvennoinen, Jie Yang
Regulation of transcription requires cooperation between sequence-specific transcription factors and numerous coregulatory proteins. In IL-4/IL-13 signaling several coactivators for STAT6 have been identified, but the molecular mechanisms of STAT6-mediated gene transcription are still not fully understood. Here we identified by proteomic approach that the PTB-associated splicing factor (PSF) interacts with STAT6. In intact cells the interaction was observed only after IL-4 stimulation. The IL-4-induced tyrosine phosphorylation of both STAT6 and PSF is a prerequisite for the efficient association of the two proteins...
February 4, 2011: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/17537995/npm-alk-binds-and-phosphorylates-the-rna-dna-binding-protein-psf-in-anaplastic-large-cell-lymphoma
#2
Annamaria Galietta, Rosalind H Gunby, Sara Redaelli, Paola Stano, Cristiana Carniti, Angela Bachi, Philip W Tucker, Carmen J Tartari, Ching-Jung Huang, Emanuela Colombo, Karen Pulford, Miriam Puttini, Rocco G Piazza, Holger Ruchatz, Antonello Villa, Arianna Donella-Deana, Oriano Marin, Danilo Perrotti, Carlo Gambacorti-Passerini
The oncogenic fusion tyrosine kinase nucleophosmin/anaplastic lymphoma kinase (NPM/ALK) induces cellular transformation in anaplastic large-cell lymphomas (ALCLs) carrying the t(2;5) chromosomal translocation. Protein-protein interactions involving NPM/ALK are important for the activation of downstream signaling pathways. This study was aimed at identifying novel NPM/ALK-binding proteins that might contribute to its oncogenic transformation. Using a proteomic approach, several RNA/DNA-binding proteins were found to coimmunoprecipitate with NPM/ALK, including the multifunctional polypyrimidine tract binding proteinassociated splicing factor (PSF)...
October 1, 2007: Blood
https://www.readbyqxmd.com/read/17223080/bipartite-nuclear-localization-signal-of-matrin-3-is-essential-for-vertebrate-cells
#3
Shoji Hisada-Ishii, Mizuki Ebihara, Nao Kobayashi, Yasuo Kitagawa
Matrin 3, a nuclear matrix protein has potential (1) to withhold promiscuously edited RNAs within the nucleus in cooperation with p54(nrb) and PSF, (2) to mediate NMDA-induced neuronal death, and (3) to modulate promoter activity of genes proximal to matrix/scaffold attachment region (MAR/SAR). We identified a bipartite nuclear localization signal (NLS) of chicken matrin 3 (cmatr3) at residues 583-602. By expressing green fluorescent protein (GFP) fused to the NLS mutant in chicken DT40 cells, we showed an essential role of the NLS for cell proliferation...
March 2, 2007: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/12917640/a-novel-cltc-tfe3-gene-fusion-in-pediatric-renal-adenocarcinoma-with-t-x-17-p11-2-q23
#4
Pedram Argani, Man Yee Lui, Jérôme Couturier, Raymonde Bouvier, Jean-Christophe Fournet, Marc Ladanyi
A distinctive subset of renal carcinomas is associated with Xp11. 2 translocations and resulting TFE3 gene fusions (PRCC-TFE3, PSF-TFE3, NONO-TFE3, ASPL-TFE3), encoding related aberrant transcription factors. We report the cloning of a novel clathrin heavy-chain gene (CLTC)-TFE3 gene fusion resulting from a t(X;17)(p11.2;q23) in a renal carcinoma arising in a 14-year-old boy. The fusion transcript joined the 5' exons of CLTC on chromosome band 17q23 to the 3' exons of TFE3. CLTC encodes a major subunit of clathrin, a multimeric protein on cytoplasmic organelles, and is a known recurrent fusion partner of the ALK tyrosine kinase gene in anaplastic large-cell lymphoma and inflammatory myofibroblastic tumors...
August 14, 2003: Oncogene
https://www.readbyqxmd.com/read/10958183/implications-of-respiratory-motion-for-the-quantification-of-2d-mr-spectroscopic-imaging-data-in-the-abdomen
#5
A J Schwarz, M O Leach
Magnetic resonance spectroscopic imaging (MRSI) studies in the abdomen or breast are acquired in the presence of respiratory motion. This modifies the point spread function (PSF) and hence the reconstructed spectra. We evaluated the quantitative effects of both periodic and aperiodic motion on spectra localized by MRSI. Artefactual signal changes, both the modification of native to a voxel and spurious signals arising elsewhere, depend primarily upon the motion amplitude relative to the voxel dimension. A similar dependence on motion amplitude was observed for simple harmonic motion (SHM), quasi-periodic motion and random displacements...
August 2000: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/9605521/prolactin-induces-expression-of-fgf-2-and-a-novel-fgf-responsive-nono-p54nrb-related-mrna-in-rat-lymphoma-cells
#6
C K Too, R Knee, A L Pinette, A W Li, P R Murphy
The rat Nb2-11C lymphoma cell line expresses high affinity prolactin (PRL) receptors, and requires lactogenic hormones for survival and proliferation. We have applied differential display to identify genes which are differentially induced in Nb2-11C cells following PRL stimulation, or which are constitutively expressed in the PRL-independent Nb2-Sp cells. In the present study we characterized a clone (22c.2) which was expressed in Nb2-Sp cells, and in Nb2-11C cells given PRL for 3 h but not in untreated cells...
February 1998: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/3921392/characterization-of-hemopoietic-growth-factors-from-t-cells-and-the-myelomonocytic-leukemia-wehi-3b
#7
I Clark-Lewis, W R Thomas, J W Schrader
P-cell-stimulating factor (PSF) (also termed interleukin 3) produced by the T-cell clone A3-37.4, the T-cell hybridoma 123, the T-lymphoma EL4, spleen cells, and the myelomonocytic cell line WEHI-3B had a similar apparent mol. wt. and in each case eluted from a Waters C18 silica column at a concentration of acetonitrile of 38%. Both the PSF from the T-cell clones and from WEHI-3B stimulated the in vitro growth of cloned T-dependent mast cells and of colonies from normal bone marrow cells. The T-cell sources--but not WEHI-3B--also produced an additional, distinct hemopoietic growth factor that stimulated the growth of colonies of neutrophils and macrophages but did not support the growth of P cells...
May 1985: Experimental Hematology
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