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Capillary electrophoresis coupled to mass spectrometer for automated and robust polypeptide determination in body fluids for clinical use.
Kaiser, Thorsten; Wittke, Stefan; Just, Ingo; Krebs, Ronald; Bartel, Sebastian; Fliser, Danilo; Mischak, Harald; Weissinger, Eva M.
Afiliação
  • Kaiser T; Mosaiques Diagnostics & Therapeutics AG.
  • Wittke S; Mosaiques Diagnostics & Therapeutics AG.
  • Just I; Hannover Medical School, Department of Toxicology, Hannover, Germany.
  • Krebs R; Mosaiques Diagnostics & Therapeutics AG.
  • Bartel S; Mosaiques Diagnostics & Therapeutics AG.
  • Fliser D; Hannover Medical School, Department of Nephrology.
  • Mischak H; Mosaiques Diagnostics & Therapeutics AG.
  • Weissinger EM; Hannover Medical School, Department of Nephrology.
Electrophoresis ; 25(13): 2044-2055, 2004 Jul.
Article em En | MEDLINE | ID: mdl-15237405
We describe the application of capillary electrophoresis (CE) coupled on-line to an electrospray ionization-time of flight-mass spectrometer (ESI-TOF-MS) to the analysis of human urine and serum for the identification of biomarkers for clinical diagnostics. CE-MS led to display > 1000 polypeptides present in complex biological samples within 45-60 min in a single analysis run. To extract the information of the CE-MS spectra in a timely fashion, a software was designed to automatically deconvolute and normalize the spectra. Both urine and serum contain several hundred polypeptides in samples from healthy individuals. Hence, it is possible to establish typical "normal urine" or "normal serum" polypeptide patterns. Samples from patients with different diseases display polypeptide patterns that differ significantly from those obtained from healthy individuals. Examining series of patients with the same disease allowed the establishment of polypeptide patterns typical for specific diseases. This permits the search for marker peptides specific for diseases. The data indicate that a single polypeptide present in all patients with the same disease, but absent in all healthy control individuals does not exist. The combination of several polypeptides found in either urine or serum or both are forming a specific pattern, which is indicative not only for the particular disease, but also for the stage of disease. CE-MS detects many polypeptides in single samples and the application of the software to the search of identical polypeptides excreted in urine allows the unbiased diagnosis based on a pattern and does not rely on single disease markers.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peptídeos / Espectrometria de Massas / Líquidos Corporais / Eletroforese Capilar Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Revista: Electrophoresis Ano de publicação: 2004 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peptídeos / Espectrometria de Massas / Líquidos Corporais / Eletroforese Capilar Tipo de estudo: Prognostic_studies Limite: Humans Idioma: En Revista: Electrophoresis Ano de publicação: 2004 Tipo de documento: Article