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Neurosci Lett. 2000 Apr 28;284(3):135-8.

Temporal profile of release of interleukin-1beta in neurotrauma.

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Department of Neurology, University Clinic Mannheim, University of Heidelberg, Theodor-Kutzer-Ufer 1-3, D-68135, Mannheim, Germany.


Timing and extent of trauma-induced release of interleukin-1beta (IL-1beta) in extracellular fluid of the CNS were analyzed. In brain tissue perfusates obtained by in vivo microdialysis a marked release of IL-1beta was unexpectedly detected within less than 60 min. At such an early stage of neurotrauma, mRNA expression of IL-1beta was detected whereas immunoreactivity for the IL-1beta protein was negative. Concentrations of extracellularly secreted IL-1beta protein gradually increased, peaked at day 2 and decreased thereafter. Drugs acting on mononuclear phagocytes significantly modulated IL-1beta secretion. This so far unrecognized acuity of IL-1beta release demonstrated here, may represent a precondition for the orchestrating role of this mediator in the cascade of inflammatory host response.

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