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Prion propagation in mice lacking central nervous system NF-kappaB signalling


Julius, C; Heikenwalder, M; Schwarz, P; Marcel, A; Karin, M; Prinz, M; Pasparakis, M; Aguzzi, A (2008). Prion propagation in mice lacking central nervous system NF-kappaB signalling. Journal of General Virology, 89(6):1545-1550.

Abstract

Prions induce highly typical histopathological changes including cell death, spongiosis and activation of glia, yet the molecular pathways leading to neurodegeneration remain elusive. Following prion infection, enhanced nuclear factor-kappaB (NF-kappaB) activity in the brain parallels the first pathological changes. The NF-kappaB pathway is essential for proliferation, regulation of apoptosis and immune responses involving induction of inflammation. The IkappaB kinase (IKK) signalosome is crucial for NF-kappaB signalling, consisting of the catalytic IKKalpha/IKKbeta subunits and the regulatory IKKgamma subunit. This study investigated the impact of NF-kappaB signalling on prion disease in mouse models with a central nervous system (CNS)-restricted elimination of IKKbeta or IKKgamma in nearly all neuroectodermal cells, including neurons, astrocytes and oligodendrocytes, and in mice containing a non-phosphorylatable IKKalpha subunit (IKKalpha AA/AA). In contrast to previously published data, the observed results showed no evidence supporting the hypothesis that impaired NF-kappaB signalling in the CNS impacts on prion pathogenesis.

Prions induce highly typical histopathological changes including cell death, spongiosis and activation of glia, yet the molecular pathways leading to neurodegeneration remain elusive. Following prion infection, enhanced nuclear factor-kappaB (NF-kappaB) activity in the brain parallels the first pathological changes. The NF-kappaB pathway is essential for proliferation, regulation of apoptosis and immune responses involving induction of inflammation. The IkappaB kinase (IKK) signalosome is crucial for NF-kappaB signalling, consisting of the catalytic IKKalpha/IKKbeta subunits and the regulatory IKKgamma subunit. This study investigated the impact of NF-kappaB signalling on prion disease in mouse models with a central nervous system (CNS)-restricted elimination of IKKbeta or IKKgamma in nearly all neuroectodermal cells, including neurons, astrocytes and oligodendrocytes, and in mice containing a non-phosphorylatable IKKalpha subunit (IKKalpha AA/AA). In contrast to previously published data, the observed results showed no evidence supporting the hypothesis that impaired NF-kappaB signalling in the CNS impacts on prion pathogenesis.

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14 citations in Web of Science®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Neuropathology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:2008
Deposited On:09 Jul 2008 08:51
Last Modified:05 Apr 2016 12:24
Publisher:Society for General Microbiology
ISSN:0022-1317
Publisher DOI:10.1099/vir.0.83622-0
PubMed ID:18474572
Permanent URL: http://doi.org/10.5167/uzh-2711

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