title: YKL-40 levels in the cerebrospinal fluid and serum of patients with aneurysmal subarachnoid hemorrhage: preliminary results.
abstract: YKL-40 is a newly discovered matrix protein thought to be secreted during the acute stages of inflammation. Clinical studies have revealed that YKL-40 has growth factor and potent migration factor activity for cells involved in inflammation and tissue remodeling processes. It has recently been speculated that YKL-40 may serve as a specific serologic marker of neutrophil function at the site of acute tissue inflammation. We aimed to quantify the levels of YKL-40 in both cerebrospinal fluid and serum of ten consecutive patients with aneurysmal subarachnoid hemorrhage and to speculate on the origin of this glycoprotein. The levels were also compared with ten control patients with hydrocephalus. We found that patients with aneurysmal subarachnoid hemorrhage had significantly higher YKL-40 levels in both cerebrospinal fluid and serum than controls. The authors believe that YKL-40 is expressed in cerebrospinal fluid due to stress on neural structures while a damaged blood-brain barrier allows entry of neutrophils and macrophages from the systemic circulation.
authors.affiliation: Department of Neurosurgery; Istanbul University, Cerrahpasa Medical Faculty, Istanbul, Turkey.
authors.forename: Mehmet Yasar
authors.initials: MY
authors.lastname: Kaynar
authors.forename: Taner
authors.initials: T
authors.lastname: Tanriverdi
authors.forename: Ali Metin
authors.initials: AM
authors.lastname: Kafadar
authors.forename: Tibet
authors.initials: T
authors.lastname: Kacira
authors.forename: Fatma
authors.initials: F
authors.lastname: Yurdakul
authors.forename: Hafize
authors.initials: H
authors.lastname: Uzun
authors.forename: Koray
authors.initials: K
authors.lastname: Gumustas
mesh_terms: D054392:Adipokines; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D000071451:Chitinase-3-Like Protein 1; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D005260:Female; D006023:Glycoproteins / Q000097:blood* / Q000134:cerebrospinal fluid*; D006801:Humans; D037102:Lectins; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D013345:Subarachnoid Hemorrhage / Q000097:blood* / Q000134:cerebrospinal fluid*; D013997:Time Factors
chemical_list: D054392:Adipokines; C084533:CHI3L1 protein, human; D000071451:Chitinase-3-Like Protein 1; D006023:Glycoproteins; D037102:Lectins