Cancer Cell Article Pemetrexed and Gemcitabine as Combination Therapy for the Treatment of Group3 Medulloblastoma Marie Morfouace,1 Anang Shelat,2 Megan Jacus,3 Burgess B. Freeman III,4 David Turner,3 Sarah Robinson,1 Frederique Zindy,1 Yong-Dong Wang,5 David Finkelstein,5 Olivier Ayrault,6 Laure Bihannic,6 Stephanie Puget,7 Xiao-Nan Li,8 James M. Olson,9 Giles W. Robinson,10 R. Kiplin Guy,2 Clinton F. Stewart,3 Amar Gajjar,10 and Martine F. Roussel1,* 1Department of Tumor Cell Biology 2Department of Chemical Biology and Therapeutics 3Department of Pharmaceutical Sciences 4Department of Preclinical Pharmacokinetics 5Department of Computational Biology St. Jude Children’s Research Hospital, Memphis, TN 38105, USA 6Institut Curie/CNRS UMR 3306/INSERM U1005 Building 110, Centre Universitaire, 91405 Orsay, Cedex, France 7AP-HP, Department of Neurosurgery, Necker-Enfants Malades Hospital, Universite´ Rene Descartes, 75015 Paris, France 8Department of Pediatrics, Section of Hematology-Oncology, Baylor College of Medicine, Houston, TX 77030, USA 9Department of Pediatric Hematology-Oncology, Fred Hutchinson Cancer Research Center, Seattle, WA 98109, USA 10Department of NeuroOncology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA *Correspondence:
[email protected] http://dx.doi.org/10.1016/j.ccr.2014.02.009 SUMMARY We devised a high-throughput, cell-based assay to identify compounds to treat Group3 medulloblastoma (G3 MB). Mouse G3 MBs neurospheres were screened against a library of approximately 7,000 compounds including US Food and Drug Administration-approved drugs. We found that pemetrexed and gemcitabine preferentially inhibited G3 MB proliferation in vitro compared to control neurospheres and substantially in- hibited G3 MB proliferation in vivo.