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001-es BibID:	BIBFORM019984
Első szerző:	Halleskog, Carina
Cím:	WNT signaling in activated microglia is proinflammatory / Carina Halleskog, Jan Mulder, Jenny Dahlström, Ken Mackie, Tibor Hortobágyi, Heikki Tanila, Lakshman Kumar Puli, Katrin Färber, Tibor Harkany, Gunnar Schulte
Dátum:	2011
ISSN:	0894-1491
Megjegyzések:	Microglia activation is central to the neuroinflammation associated with neurological and neurodegenerative diseases, particularly because activated microglia are often a source of proinflammatory cytokines. Despite decade-long research, the molecular cascade of proinflammatory transformation of microglia in vivo remains largely elusive. Here, we report increased β-catenin expression, a central intracellular component of WNT signaling, in microglia undergoing a proinflammatory morphogenic transformation under pathogenic conditions associated with neuroinflammation such as Alzheimer's disease. We substantiate disease-associated β-catenin signaling in microglia in vivo by showing age-dependent β-catenin accumulation in mice with Alzheimer's-like pathology (APdE9). In cultured mouse microglia expressing the WNT receptors Frizzled FZD(4,5,7,8) and LDL receptor-related protein 5/6 (LRP5/6), we find that WNT-3A can stabilize β-catenin. WNT-3A dose dependently induces LRP6 phosphorylation with downstream activation of disheveled, β-catenin stabilization, and nuclear import. Gene-expression profiling reveals that WNT-3A stimulation specifically increases the expression of proinflammatory immune response genes in microglia and exacerbates the release of de novo IL-6, IL-12, and tumor necrosis factor α. In summary, our data suggest that the WNT family of lipoglycoproteins can instruct proinflammatory microglia transformation and emphasize the pathogenic significance of β-catenin-signaling networks in this cell type.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Glia. - 59 : 1 (2011), p. 119-131. -
További szerzők:	Mulder, Jan Dahlström, Jenny Mackie, Ken Hortobágyi Tibor (1965-) (patológus) Tanila, Heikki Kumar Puli, Lakshman Färber, Katrin Harkány Tibor Schulte, Gunnar
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