Title of project or programme

The prion protein in health and disease (PRIONS)

Principal Investigators of project/programme grant
Title Forname Surname Institution Country
Professor Adriano Aguzzi Institute of Neuropathology University Hospital of Zurich Switzerland
Address of institution of lead PI
Institution Institute of Neuropathology University Hospital of Zurich
Street Address Schmelzbergstrasse 12
City Zurich
Postcode 8091
Country

Switzerland

Source of funding information

European Research Council

Total sum awarded (Euro)

2500000

Start date of award

01-05-2010

Total duration of award in months

60

The project/programme is most relevant to
  • Prion disease
  • Neurodegenerative disease in general
Keywords
Research abstract in English

Oligomers are toxic in an array of protein misfolding and aggregation (PMA) disorders. However, the chain of events from protein aggregation to dysfunction is poorly understood. Prion diseases are marked by accumulation of PrPSc, a misfolded variant of wild-type PrPC. PrPC mediates PrPSc neurotoxicity and counteracts toxic PrPC mutants, indicating that a subversion of normal PrPC function may underlie neurodegeneration, and this may not be limited to prion disease. Here, we propose to explore these newly discovered physiological functions of PrPC in three paradigms. We show that PrPC assembles into a multiprotein complex containing a protease; neurotoxic PrPC mutants generate a smaller complex that is uncleaved.

We show that neuronal expression of PrPC is required in trans for long-term myelin maintenance in peripheral nerves. We will therefore investigate the hypothesis that a fragment of PrPC transmits signals crucial for axomyelinic integrity. We show that PrPC physically interacts with both amyloid b and islet amyloid polypeptide and attenuates functional impairment mediated by these peptides. We therefore propose to test whether subversion of normal PrPC function is involved in diverse PMA disorders. We developed an ex vivo model that accurately reproduces major features of prion infections, most notably neurodegeneration. We have identified several unexpected PrPSc-induced cellular stress pathways which may be common to other PMA disorders.

Using this model system, we will clarify the role of PrPC in cell survival pathways and determine the requirement for PrPC in the pathology of other PMA disorders. This proposal capitalizes on provocative recent results and, if successful, will provide valuable insights into PMA toxicity that will go far beyond prion diseases.

Lay Summary

Types: Investments > €500k
Member States: Switzerland
Diseases: Neurodegenerative disease in general, Prion disease
Years: 2011
Database Categories: N/A
Database Tags: N/A

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