The value of the serum neurofilament protein heavy chain as a biomarker for peri-operative brain injury after carotid endarterectomy.
This prospective study examined the value of serum neurofilament protein levels for detecting peri-operative brain damage following carotid endarterectomy. An ELISA was used for quantification of neurofilament protein heavy chain (NfH(SMI35)) levels from patients undergoing endarterectomy for symptomatic (n = 17) and asymptomatic high-grade internal carotid artery stenosis (n = 30). All patients underwent diffusion-weighted brain imaging before and after the procedure. NfH(SMI35) levels were significantly higher in patients with a symptomatic carotid artery stenosis (0.131 ng/ml) if compared to asymptomatic patients (0.055 ng/ml, P = 0.01). However, serum NfH(SMI35) levels were not related to signs of brain ischemia on routine brain imaging techniques. Our pilot data suggests that raised NfH(SMI35) serum levels in patients with symptomatic carotid artery disease may be a sensitive biomarker for diffuse ischemic damage to the CNS. We conclude that NfH(SMI35) failed to qualify as a biomarker for peri-operative brain injury in CEA and factors that may have compromised the validation of this biomarker are discussed and need to be taken into account for the design of further studies.
Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany. sellner@lrz.tum.de
Johann
J
Sellner
Axel
A
Petzold
Suwad
S
Sadikovic
Lorena
L
Esposito
Martin S
MS
Weber
Peter
P
Heider
Hans-Henning
HH
Eckstein
Bernhard
B
Hemmer
Holger
H
Poppert
D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood; D002545:Brain Ischemia / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology; D016893:Carotid Stenosis / Q000601:surgery*; D016894:Endarterectomy, Carotid / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D016900:Neurofilament Proteins / Q000097:blood*; D010865:Pilot Projects; D011183:Postoperative Complications / Q000175:diagnosis* / Q000209:etiology; D011446:Prospective Studies; D012680:Sensitivity and Specificity
D015415:Biomarkers; D016900:Neurofilament Proteins