Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-10669

Stover, J F; Morganti-Kosmann, M C; Lenzlinger, P M; Stocker, R; Kempski, O S; Kossmann, T (1999). Glutamate and taurine are increased in ventricular cerebrospinal fluid of severely brain-injured patients. Journal of Neurotrauma, 16(2):135-142.

[img] PDF - Registered users only
2MB

Abstract

Glutamate contributes to secondary brain damage, resulting in cell swelling and brain edema. Under in vitro conditions, increased extracellular levels of the amino acid taurine reflect glutamate-induced osmotic cell swelling. In vivo, increases in cerebrospinal fluid (CSF) taurine could, therefore, unmask glutamate-mediated cytotoxic edema formation and possibly differentiate it from vasogenic edema. To test this hypothesis, ventricular CSF glutamate and taurine levels were measured in 28 severely brain-injured patients on days 1, 5, and 14 after trauma. Posttraumatic changes in CSF amino acids were investigated in regard to extent of tissue damage and alterations in brain edema as estimated by computerized tomography. On day 1, CSF glutamate and taurine levels were significantly increased in patients with subdural or epidural hematomas (8+/-0.8/71+/-12 microM), contusions (21+/-4.1/122+/-18 microM), and generalized brain edema (13+/-3.2/80+/-15 microM) compared to lumbar control CSF (1.3+/-0.1/12+/-1 microM; p < 0.001). CSF amino acids, however, did not reflect edema formation and resolution as estimated by computerized tomography. CSF taurine correlated positively with glutamate, eventually depicting glutamate-induced cell swelling. However, parallel neuronal release of taurine with its inhibitory function cannot be excluded. Thus, the sensitivity of taurine in unmasking cytotoxic edema formation is weakened by the inability in defining its origin and function under the conditions chosen in the present study. Overall, persisting pathologic ventricular CSF glutamate and taurine levels are highly suggestive of ongoing glial and neuronal impairment in humans following severe traumatic brain injury.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Division of Surgical Intensive Care Medicine
DDC:610 Medicine & health
Language:English
Date:1999
Deposited On:13 Mar 2009 13:41
Last Modified:27 Nov 2013 21:15
Publisher:Mary Ann Liebert
ISSN:0897-7151
Publisher DOI:10.1089/neu.1999.16.135
PubMed ID:10098958
Citations:Web of Science®. Times Cited: 30
Google Scholar™
Scopus®. Citation Count: 33

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page