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  • 1
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    Regulation of lymphokine messenger RNA stability by a surface-mediated T cell activation pathway (1989)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1989-04-21
    Description: Quiescent T cells can be induced to express many genes by mitogen or antigen stimulation. The messenger RNAs of some of these genes undergo relatively rapid degradation compared to messenger RNAs from constitutively expressed genes. A T cell activation pathway that specifically regulates the stability of messenger RNAs for the lymphokines interleukin-2, interferon-gamma, tumor necrosis factor-alpha, and granulocyte-macrophage colony-stimulating factor is induced by stimulation of the CD28 surface molecule. This pathway does not directly affect the steady-state messenger RNA level, transcription, or messenger RNA half-life of other T cell activation genes, including c-myc, c-fos, IL-2 receptor, and the 4F2HC surface antigen. These data show that stimuli received at the cell surface can alter gene expression by inducing specific changes in messenger RNA degradation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lindstein, T -- June, C H -- Ledbetter, J A -- Stella, G -- Thompson, C B -- New York, N.Y. -- Science. 1989 Apr 21;244(4902):339-43.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute, University of Michigan, Ann Arbor 48109.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2540528" target="_blank"〉PubMed〈/a〉
    Keywords: Antigens, CD28 ; Antigens, CD3 ; Antigens, Differentiation, T-Lymphocyte/immunology ; Colony-Stimulating Factors/genetics ; Drug Stability ; Gene Expression Regulation ; Granulocyte-Macrophage Colony-Stimulating Factor ; Growth Substances/genetics ; Interferon-gamma/genetics ; Interleukin-2/genetics ; *Lymphocyte Activation ; Lymphokines/*genetics ; RNA, Messenger/genetics/*metabolism ; Receptors, Antigen, T-Cell/immunology ; T-Lymphocytes/*immunology ; Transcription, Genetic ; Tumor Necrosis Factor-alpha/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Differential expression of c-myb mRNA in murine B lymphomas by a block to transcription elongation (1987)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1987-09-18
    Description: Expression of c-myb proto-oncogene messenger RNA (mRNA) and protein has been detected principally in tumors and in normal tissue of hematopoietic origin. In each hematopoietic lineage examined, expression of the c-myb gene is markedly downregulated during hematopoietic maturation. However, the mechanism by which differential expression of the c-myb gene is regulated is not known. In murine B-lymphoid tumor cell lines, the amount of steady-state c-myb mRNA is 10 to more than 100 times greater in pre-B cell lymphomas than in B cell lymphomas and plasmacytomas. The downregulation of c-myb mRNA correlates with events at the pre-B cell-B cell junction. Differential expression of c-myb mRNA levels detected between a pre-B cell lymphoma and a mature B cell lymphoma is now shown to be mediated by a block to transcription elongation in the first intron of the c-myb locus. In addition, this developmentally regulated difference in transcriptional activity is correlated with alterations in higher order chromatin structure as reflected by changes in the patterns of hypersensitivity to deoxyribonuclease I at the 5' end of the c-myb transcription unit. Regulation of transcription elongation may provide a more sensitive mechanism for rapidly increasing and decreasing mRNA levels in response to external stimuli than regulation of the initiation of transcription.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bender, T P -- Thompson, C B -- Kuehl, W M -- New York, N.Y. -- Science. 1987 Sep 18;237(4821):1473-6.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3498214" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; B-Lymphocytes ; Chromosome Mapping ; *Gene Expression Regulation ; Introns ; Lymphoma/*genetics ; Mice ; Nucleic Acid Hybridization ; *Peptide Chain Elongation, Translational ; *Proto-Oncogenes ; RNA, Messenger/*metabolism ; *Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
    Location Call Number Expected Availability
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