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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yi, H. Gutekunst, C. A. Rees, H. D. Levey, A. I. Hersch, S. M. Whaley, W. L. Nash, N. R. Heilman, C. J. Madden, J. J. |
| Description | Author Affiliation: Gutekunst CA ( Department of Neurology, Emory University School of Medicine, Atlanta, GA 30322, USA.); |
| Abstract | The Huntington disease (HD) phenotype is associated with expansion of a trinucleotide repeat in the IT15 gene, which is predicted to encode a 348-kDa protein named huntington. We used polyclonal and monoclonal anti-fusion protein antibodies to identify native huntingtin in rat, monkey, and human. Western blots revealed a protein with the expected molecular weight which is present in the soluble fraction of rat and monkey brain tissues and lymphoblastoid cells from control cases. In lymphoblastoid cell lines from juvenile-onset heterozygote HD cases, both normal and mutant huntingtin are expressed, and increasing repeat expansion leads to lower levels of the mutant protein. Immunocytochemistry indicates that huntingtin is located in neurons throughout the brain, with the highest levels evident in larger neurons. In the human striatum, huntingtin is enriched in a patch-like distribution, potentially corresponding to the first areas affected in HD. Subcellular localization of huntingtin is consistent with a cytosolic protein primarily found in somatodendritic regions. Huntingtin appears to particularly associate with microtubules, although some is also associated with synaptic vesicles. On the basis of the localization of huntingtin in association with microtubules, we speculate that the mutation impairs the cytoskeletal anchoring or transport of mitochondria, vesicles, or other organelles or molecules. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 19 |
| Volume Number | 92 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1995-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Brain Chemistry Hematopoietic Stem Cells Chemistry Huntington Disease Lymphocytes Nerve Tissue Proteins Isolation & Purification Nuclear Proteins Animals Brain Cytology Cell Compartmentation Cell Line Cytosol Haplorhini Immunohistochemistry Microscopy, Immunoelectron Immunology Neurons Recombinant Fusion Proteins Tissue Distribution Comparative Study 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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