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Clinical Chemistry and Laboratory Medicine (CCLM)

Published in Association with the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM)

Editor-in-Chief: Plebani, Mario

Ed. by Gillery, Philippe / Lackner, Karl J. / Lippi, Giuseppe / Melichar, Bohuslav / Schlattmann, Peter / Tate, Jillian R. / Tsongalis, Gregory J.

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Protein S-100B: A Serum Marker for Ischemic and Infectious Injury of Cerebral Tissue

Thomas Bertsch / Wendy Casarin / Marianne Kretschmar / Wilma Zimmer / Silke Walter / Clemens Sommer / Frank Muehlhauser / Andreas Ragoschke / Sandra Kuehl / Roland Schmidt / Bernd Pohlmann-Eden / Claudius Nassabi / Thomas Nichterlein / Klaus Faßbender

Citation Information: Clinical Chemistry and Laboratory Medicine. Volume 39, Issue 4, Pages 319–323, ISSN (Print) 1434-6621, DOI: 10.1515/CCLM.2001.050, June 2005

Publication History

Published Online:


The S-100B protein is released by injured astrocytes. After passage through a disintegrated blood-brain barrier (BBB) the molecule can be detected in the peripheral circulation. We investigated the association between the extent of brain injury and S-100B concentration in serum in cerebral injury caused by cerebral ischemia and cerebral fungal infection.

Study I: The S-100B serum concentration was serially determined in 24 patients with ischemic stroke at 4, 8, 10, 24, 72 hours after the onset of symptoms. We observed that patients with brain lesions larger than 5 cm3 exhibited significantly increased serum levels of S-100B at 10, 24 and 72 hours compared to those with lesion volumes below 5 cm3. Furthermore, an association between S-100B serum concentration and neurological outcome was observed.

Study II: In a mouse model of systemic fungal infection with Candida albicans we observed that serum levels of S-100B increased at day 1 after intravenous infection. At this time we could histologically demonstrate brain tissue injury by invading hyphae which had crossed the BBB. Furthermore, reactive astrogliosis was demonstrated by immunohistochemistry. On day 7 we found a significant decrease of S-100B serum level compared to day 1 and 4. This was associated with a demarcation of the fungi with leukocytes in brain tissue at this late phase of infection. No further invasion through the BBB was seen on day 7.

In conclusion, serum levels of S-100B reflect the time course of tissue injury in cerebral ischemia and cerebral infection to a similar extent. Thus, S-100B may be a useful marker to assess cerebral tissue injury.

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