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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liu, Z. Y. Kishimoto, T. Raynal, M. C. Mayer, L. Chen-kiang, S. Hirano, T. |
| Description | Author Affiliation: Raynal MC ( Brookdale Center for Molecular Biology, New York, NY 10029.); |
| Abstract | The molecular mechanism by which interleukin 6 (IL-6) induces terminal differentiation of B cells was investigated in a subpopulation of the clonal human B-lymphoblastoid cell line CESS selected for high density of cell surface IgG1. Induction of CESS cells with IL-6 resulted in a 15-fold preferential accumulation of secreted-specific gamma 1 (gamma 1s) mRNA but not of the alternatively processed membrane-specific gamma 1 (gamma 1m) mRNA. Similarly, microseconds mRNA but not the microns mRNA of the nonproductively rearranged mu heavy-chain allele was also increased. Accompanying the differential accumulation of gamma 1s mRNA was a 4.5-fold increase in lambda light-chain mRNA, leading to secretion of IgG1. Analyses of transcription in isolated nuclei demonstrated that transcriptional activation was the primary mechanism for quantitative increase of immunoglobulin mRNAs (5.5-fold for gamma 1 and mu and at least 2-fold for lambda). Since polymerase loading is diminished by 75% before reaching the downstream gamma 1m polyadenylylation site in CESS cells, irrespective of IL-6 induction, transcriptional pausing/termination appears intrinsic and contributes to the selection of gamma 1s and gamma 1m polyadenylylation sites in activated B cells. Furthermore, differential mRNA stabilization is likely to contribute to the alteration of the gamma 1s/gamma 1m mRNA ratio at IL-6 induction. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 20 |
| Volume Number | 86 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1989-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Gene Expression Regulation Genes, Immunoglobulin Drug Effects Immunoglobulin G Biosynthesis Interleukin-6 Pharmacology RNA, Messenger Transcription, Genetic B-Lymphocytes Immunology Blotting, Northern Cell Line Genetics Molecular Sequence Data Oligonucleotide Probes Chemical Synthesis Plasmids Recombinant Proteins Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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