Computational Cell Biology Faculty Candidate Research Seminar – Dr. Yang Lu

Speaker: Dr. Yang Lu – Assistant Professor, University of Waterloo, Cheriton School of Computer Science

This seminar will be presented in a hybrid format. The speaker will be delivering their talk in person at the MSL Lecture Theatre (room 102). Audience members are welcome to attend either in person or via the zoom link. Those connecting via zoom will be able to ask questions during the Q&A portion using the chat function.

Zoom link: https://ubc.zoom.us/meeting/register/u5IlduGsrTMtHdXGmqzbzaBvQA_35zO1TiP3

Talk title: Panning for gold: Interpretable and error-controlled hypothesis generation from biomedical data

Abstract: Rapid developments in high-throughput sequencing have enabled biologists to collect large volumes of multi-omics data with unprecedented resolution. However, interpretation of such an increasing amount of heterogeneous biological data becomes highly nontrivial. In my talk, I will present a data-driven research paradigm to discover testable hypotheses directly from biological data in an interpretable and error-controlled fashion. In particular, the talk will mainly focus on three recent works that span the critical components to biomedical research: data analysis, hypothesis generation, and hypothesis prioritization:  

(1) An interpretation method that generates testable biological hypotheses from deep learning models. Specifically, I developed an uncertainty-aware method to identify from single-cell RNA-seq data a combinatorial gene set signature to characterize the single-cell type. This method pioneers efforts to streamline existing single-cell analysis pipelines through a unified framework for easy interpretation. 

(2) A statistical method that subjects the hypotheses generated from deep learning models to error control, without relying on p-values. This method demonstrated to the community for the first time that the interpretation of deep learning models could achieve confidence guarantees.

(3) A critical reevaluation of problematic statistical estimation of the Basic Alignment Search Tool (BLAST), a cornerstone tool used in daily biomedical analysis over the past 30 years.We have introduced an alternative method to address this issue, ensuring that it does not yield inflated estimates of significance. Our study has the potential to influence and reshape numerous conclusions drawn by researchers.