title: Endogenous tissue plasminogen activator in neonatal cerebrospinal fluid.
abstract: Tissue type plasminogen activator (tPA) plays a role in differentiation of neurones and activity-dependent structural changes in neurones. We hypothesised that tPA would also be present in CSF during fibrinolysis after intraventricular haemorrhage. We measured tPA antigen in CSF from 13 normal newborn infants and 14 infants with post-haemorrhagic ventricular dilatation (PHVD). tPA was undetectable or at the limit of detection (1 microgram/l) in normal CSF. The CSF tPA concentration ranged from 1.3 to 3.5 micrograms/l in the infants with PHVD. Serial tapping in one infant showed persistence of tPA in the CSF from 3 to 8 weeks of age. We conclude that endogenous tPA may be part of the physiological response to intraventricular haemorrhage or may be present as a result of passive diffusion into the CSF.
authors.affiliation: Paediatric Department, Aker University Hospital, Oslo, Norway.
authors.forename: A
authors.initials: A
authors.lastname: Whitelaw
authors.forename: M C
authors.initials: MC
authors.lastname: Mowinckel
authors.forename: V
authors.initials: V
authors.lastname: Fellman
authors.forename: U
authors.initials: U
authors.lastname: Abildgaard
mesh_terms: D002543:Cerebral Hemorrhage / Q000134:cerebrospinal fluid*; D006801:Humans; D007231:Infant, Newborn / Q000134:cerebrospinal fluid*; D012016:Reference Values; D010959:Tissue Plasminogen Activator / Q000134:cerebrospinal fluid*
chemical_list: D010959:Tissue Plasminogen Activator