Self-supervised representation learning on gene expression data

Area of Science:

• Bioinformatics
• Computational Biology
• Genomics

Background:

• Phenotype prediction from gene expression is vital for understanding diseases and personalizing medicine.
• Supervised learning methods require extensive labeled data, which is scarce for gene expression datasets.
• Self-supervised learning (SSL) offers a solution by leveraging unlabeled data structures.

Purpose of the Study:

• To evaluate state-of-the-art SSL methods for phenotype prediction using bulk gene expression data.
• To assess the capability of SSL to capture complex data structures and improve predictive accuracy.
• To compare SSL performance against traditional supervised models.

Main Methods:

• Investigated three distinct SSL approaches on publicly available gene expression datasets.
• Assessed the quality of representations generated by SSL for downstream predictive tasks.
• Analyzed the strengths and limitations of each SSL method.

Main Results:

• SSL methods effectively captured complex information within gene expression data.
• SSL significantly improved phenotype prediction accuracy compared to supervised models.
• Demonstrated reduced dependency on annotated data through SSL.

Conclusions:

• SSL is a powerful tool for phenotype prediction from gene expression data, offering advantages over supervised methods.
• SSL methods provide a viable alternative when labeled data is limited.
• This study provides recommendations for SSL application and suggests future research directions.