Cognitive impairment without altered levels of cerebrospinal fluid biomarkers in patients with encephalitis caused by varicella-zoster virus: a pilot study
Artikel i vetenskaplig tidskrift, 2020

Varicella-zoster virus (VZV) is one of the most common agents causing viral infections of the central nervous system (CNS). VZV encephalitis is associated with severe neurological sequelae, despite antiviral treatment. Cognitive impairment has been reported and VZV has been associated with dementia. Our aim was to investigate the cognitive impairment and cerebrospinal fluid biomarkers in a follow-up study of patients with VZV encephalitis. Thirteen patients with VZV encephalitis, diagnosed by detection of VZV DNA in cerebrospinal fluid (CSF) by PCR and concomitant symptoms of encephalitis, were included. Neuropsychological assessment in parallel with a lumbar puncture to obtain CSF was performed 1.5–7 years after acute disease. The CSF biomarkers neurofilament light chain (NFL), S100B, glial fibrillary acidic protein (GFAP), amyloid-β (Aβ) 40 and Aβ42, total tau (t-tau) and phosphorylated tau (p-tau) were analysed and compared to controls (n = 24). Cognitive impairment was shown in the domains of executive functions and speed/attention and to a minor degree in the domains of learning/memory and language, indicated by a significantly poorer performance on seven neuropsychological test variables. No convincing evidence of alterations in concentrations of biomarkers in the CSF were shown. Our results indicate that patients with VZV encephalitis suffer from cognitive impairment long time after acute disease. Importantly, these impairments do not seem to be accompanied by biomarker evidence of ongoing neuronal or astrocytic injury/activation or induction of dementia-related brain pathologies by the infection.

Författare

Marie Eckerström

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Staffan Nilsson

Göteborgs universitet

Chalmers, Matematiska vetenskaper, Tillämpad matematik och statistik

Henrik Zetterberg

Göteborgs universitet

University College London (UCL)

UK Dementia Research Institute

Sahlgrenska universitetssjukhuset

Kaj Blennow

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Anna Grahn

Göteborgs universitet

Sahlgrenska universitetssjukhuset

Scientific Reports

2045-2322 (ISSN)

Vol. 10 1 22400

Ämneskategorier

Neurovetenskaper

Infektionsmedicin

Neurologi

DOI

10.1038/s41598-020-79800-2

PubMed

33372192

Mer information

Senast uppdaterat

2021-01-08