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Dominant phenotypes produced by the HD mutation in STHdhQ111 striatal cells

Open access
Trettel, F.·2000·Human Molecular Genetics

Abstract

Lengthening a glutamine tract in huntingtin confers a dominant attribute that initiates degeneration of striatal neurons in Huntington's disease (HD). To identify pathways that are candidates for the mutant protein's abnormal function, we compared striatal cell lines established from wild-type and Hdh(Q111) knock-in embryos. Alternate versions of full-length huntingtin, distinguished by epitope accessibility, were localized to different sets of nuclear and perinuclear organelles involved in RNA biogenesis and membrane trafficking. However, mutant STHdh(Q111) cells also exhibited additional forms of the full-length mutant protein and displayed dominant phenotypes that did not mirror phenotypes caused by either huntingtin deficiency or excess. These phenotypes indicate a disruption of striatal cell homeostasis by the mutant protein, via a mechanism that is separate from its normal activity. They also support specific stress pathways, including elevated p53, endoplasmic reticulum stress response and hypoxia, as potential players in HD.

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Metadata

Authors
Trettel, F.
Venue
Human Molecular Genetics
Published
2000-11-01
Volume
9
Issue
19
Pages
2799-2809
ISSN
  • 0964-6906 (ISSN-L)
  • 1460-2083
OpenAlex
W2135783352
Cited by
610
References
3
FWCI
3.31
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Dominant phenotypes produced by the HD mutation in STHdhQ111 striatal cells. https://app.cochat.ai/papers/10.1093/hmg/9.19.2799
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Trettel, F. (2000). Dominant phenotypes produced by the HD mutation in STHdhQ111 striatal cells. Human Molecular Genetics. https://doi.org/10.1093/hmg/9.19.2799

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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