Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/14917
Title: Explaining Graph Neural Network Predictions for Drug Repurposing
Authors: Loesch, J.
Yang, Y.
Ekmekci, P.
Dumontier, M.
Celebi, R.
Keywords: Alzheimer’S Disease
Drug Repurposing
Explainable Ai (Xai)
Graph Neural Networks (Gnns)
Knowledge Graphs (Kgs)
Saliency Maps
Publisher: CEUR-WS
Abstract: Graph Neural Networks (GNNs) are powerful tools for graph-related tasks, excelling in progressing graph-structured data while maintaining permutation invariance. However, their challenge lies in the obscurity of new node representations, hindering interpretability. This paper introduces a framework addressing this limitation by explaining GNN predictions. The proposed method takes any GNN prediction, for which it returns a concise subgraph as explanation. Utilizing Saliency Maps, an attribution gradient-based technique, we enhance interpretability by assigning importance scores to entities withing the knowledge graph via backpropagation. Evaluated on the Drug Repurposing Knowledge Graph, Graph Attention Network achieved a Hits@5 score of 0.451 and a Hits@10 score of 0.672. GraphSAGE demonstrated notable results with the highest recall rate of 0.992. Our framework underscores GNN efficacy and interpretability, which is crucial in complex scenarios like drug repurposing. Illustrated through an Alzheimer’s disease case study, our approach provides meaningful and comprehensible explanations for GNN predictions. This work contributes to advancing the transparency and utility of GNNs in real-world applications. © 2024 Copyright for this paper by its authors.
ISSN: 1613-0073
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

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