Protein Expression Molecular Pattern Discovery by Nonnegative Principal Component Analysis
PRIB '08 Proceedings of the Third IAPR International Conference on Pattern Recognition in Bioinformatics
IEEE Transactions on Information Technology in Biomedicine
CAIP'07 Proceedings of the 12th international conference on Computer analysis of images and patterns
ICCSA'07 Proceedings of the 2007 international conference on Computational science and its applications - Volume Part III
Computer Methods and Programs in Biomedicine
Quantitative prediction of MHC-II binding affinity using particle swarm optimization
Artificial Intelligence in Medicine
PRIB'11 Proceedings of the 6th IAPR international conference on Pattern recognition in bioinformatics
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Motivation: Mass spectrometric profiles of peptides and proteins obtained by current technologies are characterized by complex spectra, high dimensionality and substantial noise. These characteristics generate challenges in the discovery of proteins and protein-profiles that distinguish disease states, e.g. cancer patients from healthy individuals. We present low-level methods for the processing of mass spectral data and a machine learning method that combines support vector machines, with particle swarm optimization for biomarker selection. Results: The proposed method identified mass points that achieved high prediction accuracy in distinguishing liver cancer patients from healthy individuals in SELDI-QqTOF profiles of serum. Availability: MATLAB scripts to implement the methods described in this paper are available from the HWR's lab website http://lombardi.georgetown.edu/labpage Contact: hwr@georgetown.edu