Ciliogenesis is regulated by a huntingtin-HAP1-PCM1 pathway and is altered in Huntington disease

Guy Keryer, Jose R. Pineda, Géraldine Liot, Jinho Kim, Paula Dietrich, Caroline Benstaali, Karen Smith, Fabrice P. Cordelières, Nathalie Spassky, Robert J. Ferrante, Ioannis Dragatsis, Frédéric Saudou

Research output: Contribution to journalArticle

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Abstract

Huntington disease (HD) is a devastating autosomal-dominant neurodegenerative disorder. It is caused by expansion of a CAG repeat in the first exon of the huntingtin (HTT) gene that encodes a mutant HTT protein with a polyglutamine (polyQ) expansion at the amino terminus. Here, we demonstrate that WT HTT regulates ciliogenesis by interacting through huntingtin-associated protein 1 (HAP1) with pericentriolar material 1 protein (PCM1). Loss of Htt in mouse cells impaired the retrograde trafficking of PCM1 and thereby reduced primary cilia formation. In mice, deletion of Htt in ependymal cells led to PCM1 mislocalization, alteration of the cilia layer, and hydrocephalus. Pathogenic polyQ expansion led to centrosomal accumulation of PCM1 and abnormally long primary cilia in mouse striatal cells. PCM1 accumulation in ependymal cells was associated with longer cilia and disorganized cilia layers in a mouse model of HD and in HD patients. Longer cilia resulted in alteration of the cerebrospinal fluid flow. Thus, our data indicate that WT HTT is essential for protein trafficking to the centrosome and normal ciliogenesis. In HD, hypermorphic ciliogenesis may affect signaling and neuroblast migration so as to dysregulate brain homeostasis and exacerbate disease progression.

Original languageEnglish (US)
Pages (from-to)4372-4382
Number of pages11
JournalJournal of Clinical Investigation
Volume121
Issue number11
DOIs
StatePublished - Nov 1 2011

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Cilia
Huntington Disease
Proteins
Corpus Striatum
Centrosome
Protein Transport
Mutant Proteins
Hydrocephalus
Neurodegenerative Diseases
Cerebrospinal Fluid
Disease Progression
Huntingtin Protein
Exons
Homeostasis
Brain
Genes
polyglutamine

All Science Journal Classification (ASJC) codes

  • Medicine(all)

Cite this

Ciliogenesis is regulated by a huntingtin-HAP1-PCM1 pathway and is altered in Huntington disease. / Keryer, Guy; Pineda, Jose R.; Liot, Géraldine; Kim, Jinho; Dietrich, Paula; Benstaali, Caroline; Smith, Karen; Cordelières, Fabrice P.; Spassky, Nathalie; Ferrante, Robert J.; Dragatsis, Ioannis; Saudou, Frédéric.

In: Journal of Clinical Investigation, Vol. 121, No. 11, 01.11.2011, p. 4372-4382.

Research output: Contribution to journalArticle

Keryer, G, Pineda, JR, Liot, G, Kim, J, Dietrich, P, Benstaali, C, Smith, K, Cordelières, FP, Spassky, N, Ferrante, RJ, Dragatsis, I & Saudou, F 2011, 'Ciliogenesis is regulated by a huntingtin-HAP1-PCM1 pathway and is altered in Huntington disease', Journal of Clinical Investigation, vol. 121, no. 11, pp. 4372-4382. https://doi.org/10.1172/JCI57552
Keryer, Guy ; Pineda, Jose R. ; Liot, Géraldine ; Kim, Jinho ; Dietrich, Paula ; Benstaali, Caroline ; Smith, Karen ; Cordelières, Fabrice P. ; Spassky, Nathalie ; Ferrante, Robert J. ; Dragatsis, Ioannis ; Saudou, Frédéric. / Ciliogenesis is regulated by a huntingtin-HAP1-PCM1 pathway and is altered in Huntington disease. In: Journal of Clinical Investigation. 2011 ; Vol. 121, No. 11. pp. 4372-4382.
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