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Dissociation of frontotemporal dementia-related deficits and neuroinflammation in progranulin haploinsufficient mice.
Filiano, Anthony J; Martens, Lauren Herl; Young, Allen H; Warmus, Brian A; Zhou, Ping; Diaz-Ramirez, Grisell; Jiao, Jian; Zhang, Zhijun; Huang, Eric J; Gao, Fen-Biao; Farese, Robert V; Roberson, Erik D.
Afiliação
  • Filiano AJ; Center for Neurodegeneration and Experimental Therapeutics, Departments of Neurology and Neurobiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
J Neurosci ; 33(12): 5352-61, 2013 Mar 20.
Article em En | MEDLINE | ID: mdl-23516300
Frontotemporal dementia (FTD) is a neurodegenerative disease with hallmark deficits in social and emotional function. Heterozygous loss-of-function mutations in GRN, the progranulin gene, are a common genetic cause of the disorder, but the mechanisms by which progranulin haploinsufficiency causes neuronal dysfunction in FTD are unclear. Homozygous progranulin knock-out (Grn(-/-)) mice have been studied as a model of this disorder and show behavioral deficits and a neuroinflammatory phenotype with robust microglial activation. However, homozygous GRN mutations causing complete progranulin deficiency were recently shown to cause a different neurological disorder, neuronal ceroid lipofuscinosis, suggesting that the total absence of progranulin may have effects distinct from those of haploinsufficiency. Here, we studied progranulin heterozygous (Grn(+/-)) mice, which model progranulin haploinsufficiency. We found that Grn(+/-) mice developed age-dependent social and emotional deficits potentially relevant to FTD. However, unlike Grn(-/-) mice, behavioral deficits in Grn(+/-) mice occurred in the absence of gliosis or increased expression of tumor necrosis factor-α. Instead, we found neuronal abnormalities in the amygdala, an area of selective vulnerability in FTD, in Grn(+/-) mice. Our findings indicate that FTD-related deficits resulting from progranulin haploinsufficiency can develop in the absence of detectable gliosis and neuroinflammation, thereby dissociating microglial activation from functional deficits and suggesting an important effect of progranulin deficiency on neurons.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Peptídeos e Proteínas de Sinalização Intercelular / Encefalite / Demência Frontotemporal Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Peptídeos e Proteínas de Sinalização Intercelular / Encefalite / Demência Frontotemporal Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Ano de publicação: 2013 Tipo de documento: Article