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Herpes simplex virus type 1 infection in neurons leads to production and nuclear localization of APP intracellular domain (AICD): implications for Alzheimers disease pathogenesis

Civitelli, Livia (författare)
Linköpings universitet,Avdelningen för neuro- och inflammationsvetenskap,Medicinska fakulteten,University of Roma La Sapienza, Italy
Marcocci, Maria Elena (författare)
University of Roma La Sapienza, Italy
Celestino, Ignacio (författare)
University of Roma La Sapienza, Italy
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Piacentini, Roberto (författare)
University of Cattolica Sacro Cuore, Italy
Garaci, Enrico (författare)
Telemat University, Italy
Grassi, Claudio (författare)
University of Cattolica Sacro Cuore, Italy
De Chiara, Giovanna (författare)
CNR, Italy
Palamara, Anna Teresa (författare)
University of Roma La Sapienza, Italy
visa färre...
 (creator_code:org_t)
SPRINGER, 2015
2015
Engelska.
Ingår i: Journal of Neurovirology. - : SPRINGER. - 1355-0284 .- 1538-2443. ; 21:5, s. 480-490
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Several data indicate that neuronal infection with herpes simplex virus type 1 (HSV-1) causes biochemical alterations reminiscent of Alzheimers disease (AD) phenotype. They include accumulation of amyloid-beta (A beta), which originates from the cleavage of amyloid precursor protein (APP), and hyperphosphorylation of tau protein, which leads to neurofibrillary tangle deposition. HSV-1 infection triggers APP processing and drives the production of several fragments including APP intracellular domain (AICD) that exerts transactivating properties. Herein, we analyzed the production and intracellular localization of AICD following HSV-1 infection in neurons. We also checked whether AICD induced the transcription of two target genes, neprilysin (nep) and glycogen synthase kinase 3 beta (gsk3 beta), whose products play a role in A beta clearance and tau phosphorylation, respectively. Our data indicate that HSV-1 led to the accumulation and nuclear translocation of AICD in neurons. Moreover, results from chromatin immunoprecipitation assay showed that AICD binds the promoter region of both nep and gsk3 beta. Time course analysis of NEP and GSK3 beta expression at both mRNA and protein levels demonstrated that they are differently modulated during infection. NEP expression and enzymatic activity were initially stimulated but, with the progression of infection, they were down-regulated. In contrast, GSK3 beta expression remained nearly unchanged, but the analysis of its phosphorylation suggests that it was inactivated only at later stages of HSV-1 infection. Thus, our data demonstrate that HSV-1 infection induces early upstream events in the cell that may eventually lead to A beta deposition and tau hyperphosphorylation and further suggest HSV-1 as a possible risk factor for AD.

Ämnesord

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine (hsv//eng)
MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper (hsv//swe)

Nyckelord

Alzheimers disease; Herpes simplex virus (HSV-1); APP; Neurodegeneration; AICD; Neprilysin; GSK3 beta

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