Proteomics in pathology, research and practice

Pathology, Research and Practice
Christoph RöckenAlbert Roessner

Abstract

Using more reliable and sophisticated protein biochemical techniques, it is possible to perform large scale, partly high-throughput characterization of the human proteome. Two-dimensional electrophoresis (2-DE) and mass spectrometry largely contribute to the identification of proteins and peptides. 2-DE has been used to study differential expression of peptides and proteins in various disease entities, searching for new diagnostic and therapeutic targets. However, 2-DE usually requires large amounts of starting material, is time-consuming, and reveals only a fraction of the proteins present in a given sample. More recently, the ProteinChip technology coupled with bioinformatics has gained considerable attention. This technique uses surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI TOF/MS) to screen any protein source for putative disease biomarkers in a spectrum from 2 to 20 kDa. Between 15,500 (low resolution SELDI TOF) and > 400,000 peptides and proteins (high-resolution SELDI-TOF) can be resolved from a small sample volume (microl-range). Several studies have provided evidence that ProteinChip technology is capable of detecting early stage cancer by its unique cancer-specific proteomic fing...Continue Reading

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