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Published in: Journal of Neuro-Oncology 3/2018

01-09-2018 | Laboratory Investigation

Pre- and early postoperative GFAP serum levels in glioma and brain metastases

Authors: Peter Baumgarten, Johanna Quick-Weller, Florian Gessler, Marlies Wagner, Julia Tichy, Marie-Therese Forster, Christian Foerch, Volker Seifert, Michel Mittelbronn, Christian Senft

Published in: Journal of Neuro-Oncology | Issue 3/2018

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Abstract

Subject

To date there is no established tumor marker for the clinical follow-up of glioblastoma, WHO grade IV, (GBM) which constitutes the most frequent and malignant primary brain tumor. However, since there is promising data that the serum glial fibrillary acidic protein (sGFAP) may serve as a biomarker for glial brain tumors, this prospective study aimed at evaluating the diagnostic relevance of perioperative changes in sGFAP levels for the assessment of residual glial tumor tissue in patients undergoing surgery of intracerebral tumors.

Methods

Serum GFAP was measured using an electrochemiluminometric immunoassay (ElecsysR GFAP prototype test, Roche Diagnostics, Penzberg/Germany) in 32 prospectively recruited patients between September 2009 and August 2010. Twenty-five were diagnosed with glioma and seven with brain metastases (BM). We assessed sGFAP levels prior to and at different time points during the early postoperative phase until patient discharge.

Results

There were only significant differences in the pre-operative sGFAP levels of patients with gliomas compared to BM (0.18 vs. 0.08 µg/l; p = 0.0198, Welch’s t-Test). Even though there was an increase of sGFAP after surgery, there were no significant differences between glioma and BM patients at any other time point. Peak sGFAP levels where reached on postoperative day 1 followed by a slight decrease, but not reaching pre-operative levels until postop day 7. There was no significant correlation between postoperative glioma tumor volume and sGFAP levels in univariate analyses.

Conclusion

According to our data sGFAP does not appear to be suitable to detect residual glioma tissue in the acute postoperative phase.
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Metadata
Title
Pre- and early postoperative GFAP serum levels in glioma and brain metastases
Authors
Peter Baumgarten
Johanna Quick-Weller
Florian Gessler
Marlies Wagner
Julia Tichy
Marie-Therese Forster
Christian Foerch
Volker Seifert
Michel Mittelbronn
Christian Senft
Publication date
01-09-2018
Publisher
Springer US
Published in
Journal of Neuro-Oncology / Issue 3/2018
Print ISSN: 0167-594X
Electronic ISSN: 1573-7373
DOI
https://doi.org/10.1007/s11060-018-2898-1

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