The AT/RT cell lines CHLA-02-ATRT, CHLA-04-ATRT, and CHLA-06-ATRT have been previously described [37 (link)]. CHLA-02-ATRT and CHLA-04-ATRT are available from ATCC (Manassas, VA). The BT37 AT/RT cell line was derived from a serially passaged xenograft derived from a patient with AT/RT. Cells were grown as semi-adherent cultures in RPMI/10% FBS media (500 mL RPMI, 50 mL fetal bovine serum, 1% L-glutamine, 1% Penicillin/Streptomycin, Life Technologies, Grand Island, NY). Cells were split at high density after scraping and gentle titration. BT12 cells (available through the Children's Oncology Group cell repository, Lubbock, TX) were grown in RPMI/10% FBS media (500 mL RPMI, 50 mL fetal bovine serum, 1% L-glutamine, 1% Penicillin/Streptomycin. Selumetinib (AZD6244) was obtained from Selleck Chemicals (Houston, TX) and dissolved in DMSO.
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