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Pisces: A cross-modal contrastive learning approach to synergistic drug combination prediction

Jiacheng Lin, Hanwen Xu, Addie Woicik, Jianzhu Ma, Sheng Wang
doi: https://doi.org/10.1101/2022.11.21.517439
Jiacheng Lin
1Department of Automation, Tsinghua University, Beijing, China
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Hanwen Xu
2Paul G. Allen School of Computer Science and Engineering, University of Washington, WA
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Addie Woicik
2Paul G. Allen School of Computer Science and Engineering, University of Washington, WA
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Jianzhu Ma
3Institute for Artificial Intelligence, Peking University, Beijing, China
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Sheng Wang
2Paul G. Allen School of Computer Science and Engineering, University of Washington, WA
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  • For correspondence: swang@cs.washington.edu
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Abstract

Drug combination therapy is a promising solution to many complicated diseases. Since experimental measurements cannot be scaled to millions of candidate combinations, many computational approaches have been developed to identify synergistic drug combinations. While most of the existing approaches either use SMILES-based features or molecular-graph-based features to represent drugs, we found that neither of these two feature modalities can comprehensively characterize a pair of drugs, necessitating the integration of these two types of features. Here, we propose Pisces, a cross-modal contrastive learning approach for synergistic drug combination prediction. The key idea of our approach is to model the combination of SMILES and molecular graphs as four views of a pair of drugs, and then apply contrastive learning to embed these four views closely to obtain high-quality drug pair embeddings. We evaluated Pisces on a recently released GDSC-Combo dataset, including 102,893 drug combinations and 125 cell lines. Pisces outperformed five existing drug combination prediction approaches under three settings, including vanilla cross validation, stratified cross validation for drug combinations, and stratified cross validation for cell lines. Our case study and ablation studies further confirmed the effectiveness of our novel contrastive learning framework and the importance of integrating the SMILES-based features and the molecular-graph-based features. Pisces has obtained the state-of-the-art results on drug synergy prediction and can be potentially used to model other pairs of drugs applications, such as drug-drug interaction.

Availability Implementation of Pisces and comparison approaches can be accessed at https://github.com/linjc16/Pisces.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted November 22, 2022.
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Pisces: A cross-modal contrastive learning approach to synergistic drug combination prediction
Jiacheng Lin, Hanwen Xu, Addie Woicik, Jianzhu Ma, Sheng Wang
bioRxiv 2022.11.21.517439; doi: https://doi.org/10.1101/2022.11.21.517439
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Pisces: A cross-modal contrastive learning approach to synergistic drug combination prediction
Jiacheng Lin, Hanwen Xu, Addie Woicik, Jianzhu Ma, Sheng Wang
bioRxiv 2022.11.21.517439; doi: https://doi.org/10.1101/2022.11.21.517439

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