The University of Southampton
University of Southampton Institutional Repository

Time-lapse analysis of aggregate formation in an inducible PC12 cell model of huntington's disease reveals time-dependent aggregate formation that transiently delays cell death

Gong, B., Lim, M. C. Y., Wyttenbach, A. and Morton, A. J. (2008) Time-lapse analysis of aggregate formation in an inducible PC12 cell model of huntington's disease reveals time-dependent aggregate formation that transiently delays cell death Brain Research Bulletin, 75, (1), pp. 146-157. (doi:10.1016/j.brainresbull.2007.08.005).

Record type: Article


Huntington's disease (HD) is a progressive neurodegenerative disease caused by a CAG repeat expansion in the coding region of the HD gene. The translated polyglutamine expansion causes the formation of insoluble aggregates in the brains of HD patients and transgenic mouse models. However, the relationship between aggregate formation and neuropathology remains unknown.

We used fluorescent protein tagging and live-cell time-lapse microscopy to study visible aggregate formation and its relationship to cell death in transgenic PC12 cells. We used cell lines expressing a fragment of huntingtin exon 1 with either 23 (wild type) or 74 (mutant) glutamines fused to enhanced green fluorescent protein under the control of an inducible promoter. Live cells were observed in real time after transgene induction for up to 96 h. We found that aggregate formation was time-dependent and predominantly nuclear in these cells. We followed inclusion formation in individual cells, examining the cells every 10 min for up to 48 h. This revealed new details of inclusion formation. Initial aggregate formation was rapid (often <1 h), but many (18–>48) h were needed to establish a final aggregate phenotype. Aggregates formed in a dynamic manner and were in constant motion within cell nuclei throughout their maturation.

The formation of large aggregates occurred more frequently in cells that survived longer. However, aggregate size was not a good predictor of cell death, since cells could die with either large (>2 ?m), small (<0.5 ?m) or no visible aggregates. Cells that formed large aggregates survived longer than cells that formed small aggregates or no aggregates at all. However, the time taken for a cell to die decreased as a function of increasing size of final aggregate formed.

Further, cells that formed aggregates earlier tended to die earlier. Together our data are compatible with a toxic role for aggregates/aggregation and support the ‘toxic precursor’ hypothesis. However, they also suggest that at some stages, the process of aggregate formation is cytoprotective.

Full text not available from this repository.

More information

Published date: 31 January 2008
Keywords: inclusions, aggregates, huntingtin, PC12 cell, time-lapse microscopy


Local EPrints ID: 145299
ISSN: 0361-9230
PURE UUID: 95639464-0458-45d8-858c-a2b1a6b08e46

Catalogue record

Date deposited: 19 Apr 2010 10:00
Last modified: 18 Jul 2017 23:06

Export record



Author: B. Gong
Author: M. C. Y. Lim
Author: A. Wyttenbach
Author: A. J. Morton

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.