Systems biology-based drug repositioning identifies digoxin as a potential therapy for groups 3 and 4 medulloblastoma

Lei Huang, Sarah Garrett Injac, Kemi Cui, Frank Braun, Qi Lin, Yuchen Du, Huiyuan Zhang, Mari Kogiso, Holly Lindsay, Sibo Zhao, Patricia Baxter, Adesina Adekunle, Tsz Kwong Man, Hong Zhao, Xiao Nan Li, Ching C. Lau, Stephen T. Wong

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


Medulloblastoma (MB) is the most common malignant brain tumor of childhood. Although outcomes have improved in recent decades, new treatments are still needed to improve survival and reduce treatment-related complications. The MB subtypes groups 3 and 4 represent a particular challenge due to their intragroup heterogeneity, which limits the options for “rational” targeted therapies. Here, we report a systems biology approach to drug repositioning that integrates a nonparametric, bootstrapping-based simulated annealing algorithm and a 3D drug functional network to characterize dysregulated driver signaling networks, thereby identifying potential drug candidates. From more than 1300 drug candidates studied, we identified five members of the cardiac glycoside family as potentially inhibiting the growth of groups 3 and 4 MB and subsequently confirmed this in vitro. Systemic in vivo treatment of orthotopic patient-derived xenograft (PDX) models of groups 3 and 4 MB with digoxin, a member of the cardiac glycoside family approved for the treatment of heart failure, prolonged animal survival at plasma concentrations known to be tolerated in humans. These results demonstrate the power of a systematic drug repositioning method in identifying a potential treatment for MB. Our strategy could potentially be used to accelerate the repositioning of treatments for other human cancers that lack clearly defined rational targets.

Original languageEnglish (US)
Article numbereaat0150
JournalScience translational medicine
Issue number464
StatePublished - Oct 24 2018

ASJC Scopus subject areas

  • Medicine(all)


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