title: Identification and preliminary characterization of ubiquitin C terminal hydrolase 1 (UCHL1) as a biomarker of neuronal loss in aneurysmal subarachnoid hemorrhage.
abstract: By using two different approaches, ubiquitin C-terminal hydrolase 1 (UCHL1) was identified as a potential cerebrospinal fluid (CSF) biomarker of neuronal loss in aneurysmal subarachnoid hemorrhage (ASAH) and presumably other CNS damage and disease states. Appropriate antibodies and a sensitive ELISA were generated, and the release of UCHL1 into CSF was compared with that of pNF-H and S100beta in a cohort of 30 ASAH patients. Both UCHL1 and pNF-H showed persistent release into CSF in almost all patients in the second week postaneurysmal rupture (AR), and S100beta levels rapidly declined to baseline levels in 23 of 30 patients. Seven of thirty patients showed persistently elevated S100beta levels over the first 5 days post-AR and also had relatively higher levels of pNF-H and UCHL1 higher compared with the rest. These patients proved to have very poor outcomes, with 6 of 7 expiring. Patients who did reduce S100beta levels tended to have a better outcome if pNF-H and UCHL1 levels were also lower, and elevated UCHL1 levels in the second week post-AR were particularly predictive of poor outcome. Acute coordinated releases of large amounts of UCHL1, pNF-H, and S100beta in 16 of 30 patients were observed, suggesting sudden loss of brain tissues associated with secondary events. We conclude that measurement of the CSF levels of these proteins reveals details of ASAH progression and recovery and predicts patient outcome.
authors.affiliation: Department of Neurological Surgery, McKnight Brain Institute, University of Florida College of Medicine, Gainesville, FL 32610, USA.
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Lewis
authors.forename: Regina
authors.initials: R
authors.lastname: Wolper
authors.forename: Yueh-Yun
authors.initials: YY
authors.lastname: Chi
authors.forename: Lynn
authors.initials: L
authors.lastname: Miralia
authors.forename: Yong
authors.initials: Y
authors.lastname: Wang
authors.forename: Cui
authors.initials: C
authors.lastname: Yang
authors.forename: Gerry
authors.initials: G
authors.lastname: Shaw
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000032:analysis / Q000134:cerebrospinal fluid; D020520:Brain Infarction / Q000134:cerebrospinal fluid / Q000175:diagnosis / Q000201:enzymology; D015331:Cohort Studies; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009410:Nerve Degeneration / Q000134:cerebrospinal fluid* / Q000175:diagnosis / Q000201:enzymology*; D009414:Nerve Growth Factors / Q000032:analysis / Q000134:cerebrospinal fluid; D016900:Neurofilament Proteins / Q000032:analysis / Q000134:cerebrospinal fluid; D009474:Neurons / Q000201:enzymology* / Q000473:pathology; D011237:Predictive Value of Tests; D011379:Prognosis; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000032:analysis / Q000134:cerebrospinal fluid; D013345:Subarachnoid Hemorrhage / Q000150:complications*; D043222:Ubiquitin Thiolesterase / Q000032:analysis / Q000134:cerebrospinal fluid*; D015854:Up-Regulation / Q000502:physiology
chemical_list: D015415:Biomarkers; D009414:Nerve Growth Factors; D016900:Neurofilament Proteins; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins; C482860:UCHL1 protein, human; C051774:neurofilament protein H; D043222:Ubiquitin Thiolesterase