Hannah Voß

ZOOM Meeting

May 25th, 2022

4 pm

Chair: Sigurður Rafn Þorkelsson

We are very happy to welcome Hanna Voß (Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf) as speaker in our series. In her talk, she will introduce recent data science challenges in the field of mass spectrometry. The title of the presentation is "Data integration of in-house and publicly available proteome data across tissue types, quantification techniques and experimental setups overcomes cohort size limitations and enables valid statistical analysis for rare samples".

Abstract

Investing the proteome is crucial for the understanding of molecular changes in diseases, as the proteome represents pharmacologically addressable phenotype.Small cohorts limit the usability and validity of statistical methods especially for rare disease, while variable technical setups and high numbers of missing values make data integration from public sources challenging. Here, we show for the first time the successful integration of proteomic data across different tissue types (Fresh Frozen, Formalin Fixated Paraffin embedded (FFPE)), quantification platforms (DDA, DIA, SILAC, TMT) and technical setups, while handling missing data without the need for error prone imputation. The developed framework can remove technical batch effects trough Bayesian framework or linear regression model and is adaptable to different data probability distributions-according to the user’s needs.

Based on different datasets we show that data integration across independent proteomic cohorts can help to identify subpopulations and to disclose molecular signatures and altered pathways in biomarker discovery studies.

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