title: Peptide screening of cerebrospinal fluid in patients with glioblastoma multiforme.
abstract: OBJECTIVE
  To apply modern mass spectrometry based technology to identify possible CSF peptide markers of glioblastoma multiforme (GBM).
  
  
  METHODS
  Mass spectrometry based peptidomics technology enables a systematic and comprehensive screening of cerebrospinal fluid (CSF) with regard to its peptide composition. Differential Peptide Display (DPD) allows the identification of single marker peptides for a target disease. Using both, we analyzed CSF samples of 11 patients harbouring a glioblastoma multiforme in comparison to 13 normal controls.
  
  
  RESULTS
  Four CSF peptides which significantly distinguished GBM from controls in all applied statistic tests could be identified out of more than 2,000 detected CSF peptides. They were specific C-terminal fragments of alpha-1-antichymotrypsin, osteopontin, and transthyretin as well as a N-terminal residue of albumin. All molecules are constituents of normal CSF, but none has previously been reported to be significantly elevated in CSF of GBM patients.
  
  
  CONCLUSIONS
  The study showed that peptidomics technology is able to identify possible biomarkers of neoplastic CNS disease. It remains to be determined if the identified elevated CSF peptides are specific for GBM. With regard to GBM, however, the more important role of CSF peptide biomarkers than aiding initial diagnosis might be early recognition of disease recurrence or monitoring of efficacy of adjuvant therapy protocols.
authors.affiliation: Klinik für Neurochirurgie, Medizinische Hochschule Hannover, Germany. martin.schuhmann@med.uni-tuebingen.de
authors.forename: M U
authors.initials: MU
authors.lastname: Schuhmann
authors.forename: H D
authors.initials: HD
authors.lastname: Zucht
authors.forename: R
authors.initials: R
authors.lastname: Nassimi
authors.forename: G
authors.initials: G
authors.lastname: Heine
authors.forename: C G
authors.initials: CG
authors.lastname: Schneekloth
authors.forename: H J
authors.initials: HJ
authors.lastname: Stuerenburg
authors.forename: H
authors.initials: H
authors.lastname: Selle
mesh_terms: D000328:Adult; D000368:Aged; D000418:Albumins / Q000134:cerebrospinal fluid; D014408:Biomarkers, Tumor / Q000134:cerebrospinal fluid*; D002851:Chromatography, High Pressure Liquid; D005260:Female; D005909:Glioblastoma / Q000134:cerebrospinal fluid*; D006801:Humans; D008297:Male; D008875:Middle Aged; D053495:Osteopontin / Q000134:cerebrospinal fluid; D010446:Peptide Fragments; D010455:Peptides / Q000134:cerebrospinal fluid*; D011228:Prealbumin / Q000134:cerebrospinal fluid; D040901:Proteomics / Q000379:methods; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015173:Supratentorial Neoplasms / Q000134:cerebrospinal fluid*; D000514:alpha 1-Antichymotrypsin / Q000134:cerebrospinal fluid
chemical_list: D000418:Albumins; D014408:Biomarkers, Tumor; D010446:Peptide Fragments; D010455:Peptides; D011228:Prealbumin; D000514:alpha 1-Antichymotrypsin; D053495:Osteopontin