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Cardiac Surgery is Associated with Biomarker Evidence of Neuronal Damage.

Journal article
Authors Marek Alifier
B Olsson
Ulf Andreasson
Nicholas C Cullen
Jolanta Czyżewska
Piotr Jakubów
Andrzej Sieśkiewicz
Anna Stasiak-Barmuta
Tomasz Hirnle
Johannes Kornhuber
Henrik Zetterberg
Piotr Lewczuk
Kaj Blennow
Published in Journal of Alzheimer's disease : JAD
Volume 74
Issue 4
Pages 1211-1220
ISSN 1875-8908
Publication year 2020
Published at Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry
Pages 1211-1220
Language en
Links dx.doi.org/10.3233/JAD-191165
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Neurochemistry

Abstract

Anesthesia and surgery is commonly associated with central nervous system sequelae and cognitive symptoms, which may be caused by neuronal injury. Neuronal injury can be monitored by plasma concentrations of the neuronal biomarkers tau and neurofilament light protein (NFL). Currently, there are no studies examining whether neuronal injury varies between surgical procedures.Our aim was to investigate if neuronal damage is more frequent after cardiac than after otolaryngeal surgery, as estimated by tau and NFL concentrations in plasma.Blood samples were drawn before, during, and after surgery and concentrations of tau, NFL, Aβ40, and Aβ42 were measured in 25 patients undergoing cardiac surgery (9 off-pump and 16 on-pump) and 26 patients undergoing otolaryngeal surgery.Tau increased during surgery (1752%, p = 0.0001) and NFL rose seven days post-surgery (1090%, p < 0.0001) in patients undergoing cardiac surgery; even more in patients on-pump than off-pump. No changes were observed in patients undergoing otolaryngeal surgery and only minor fluctuations were observed for Aβ40 and Aβ42.Cardiac surgery is associated with neuronal injury, which is aggravated by extracorporeal circulation. Analyses of NFL and tau in blood may guide development of surgical procedures to minimize neuronal damage, and may also be used in longitudinal clinical studies to assess the relationship of surgery with future neurocognitive impairment or dementia.

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