Chapter

Machine Learning for Health Informatics

Volume 9605 of the series Lecture Notes in Computer Science pp 319-336

Date:

Network-Guided Biomarker Discovery

  • Chloé-Agathe AzencottAffiliated withCBIO-Centre for Computational Biology, MINES ParisTech, PSL-Research UniversityInstitut CurieINSERM, U900 Email author 

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Abstract

Identifying measurable genetic indicators (or biomarkers) of a specific condition of a biological system is a key element of precision medicine. Indeed it allows to tailor diagnostic, prognostic and treatment choice to individual characteristics of a patient. In machine learning terms, biomarker discovery can be framed as a feature selection problem on whole-genome data sets. However, classical feature selection methods are usually underpowered to process these data sets, which contain orders of magnitude more features than samples. This can be addressed by making the assumption that genetic features that are linked on a biological network are more likely to work jointly towards explaining the phenotype of interest. We review here three families of methods for feature selection that integrate prior knowledge in the form of networks.

Keywords

Biological networks Structured sparsity Feature selection Biomarker discovery