Strengthening Clinical Proteomics Capabilities
The Swedish Research Council has approved approximately SEK 13,6 million for investments in advanced mass spectrometry and in automatization robots at Proteomics Core Facility. Proteome analysis, is a key technology for taking precision medicine to the next level.
DIA is a method for peptide sequencing, in which all ions within a selected mass range are fragmented and analyzed in parallell As comparison, in a data-dependent acquisition (DDA) only a fixed number of precursor ions are selected and analyzed, one at a time DIA will be combined with ion mobility as a second separation parameter combined with the regular liquid chromatography separation of peptides.
DIA is applied on non-fractionated samples and is based on label-free quantification. This increases the throughput and decreases the consumable demands, while also reduces costs and efforts of sample handling. DIA requires more instrument time, due to individual sample analyzed without labels.
Moreover, the DIA method has been shown to generate an overlapping proteome analysis across different samples, which might reduce the problem of missing values in the analysis. In the context of DIA data, a digital record is generated and queried against an existing spectral library used to extract mixed peptide peak signals.
“The usage of proteome analysis is now catalyzed by ion mobility separation and data-independent acquisition (DIA-MS) together by Parallel Reaction Monitoring (PRM) analysis. There are new technical developments in the proteomics field, and this is what we are now investing in.”
Carina Sihlbom, unit manager at Proteomics Core Facility