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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Thompson, L. M. Spasic-boskovic, O. Housman, D. E. Zhu, Y. Z. Steffan, J. S. Gohler, H. Wanker, E. E. Greenwald, M. Bates, G. P. Kazantsev, A. |
| Description | Author Affiliation: Steffan JS ( Department of Biological Chemistry, D240 Medical Sciences I, University of California, Irvine, CA 92697-1700, USA.); |
| Abstract | Huntington's Disease (HD) is caused by an expansion of a polyglutamine tract within the huntingtin (htt) protein. Pathogenesis in HD appears to include the cytoplasmic cleavage of htt and release of an amino-terminal fragment capable of nuclear localization. We have investigated potential consequences to nuclear function of a pathogenic amino-terminal region of htt (httex1p) including aggregation, protein-protein interactions, and transcription. httex1p was found to coaggregate with p53 in inclusions generated in cell culture and to interact with p53 in vitro and in cell culture. Expanded httex1p represses transcription of the p53-regulated promoters, p21(WAF1/CIP1) and MDR-1. httex1p was also found to interact in vitro with CREB-binding protein (CBP) and mSin3a, and CBP to localize to neuronal intranuclear inclusions in a transgenic mouse model of HD. These results raise the possibility that expanded repeat htt causes aberrant transcriptional regulation through its interaction with cellular transcription factors which may result in neuronal dysfunction and cell death in HD. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 12 |
| Volume Number | 97 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2000-07-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cyclic AMP Response Element-Binding Protein Physiology Huntington Disease Genetics Nerve Tissue Proteins Nuclear Proteins Repressor Proteins Tumor Suppressor Protein P53 Animals Cells, Cultured Mice Mice, Inbred C57BL Mice, Inbred CBA Mice, Transgenic Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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