BH3 profiling reveals BCL-2 dependence in ETP-ALL in a separate cohort of DFCI patient samples. BH3 profiling reveals BCL-2 dependence in ETP-ALL in a.

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BH3 profiling reveals BCL-2 dependence in ETP-ALL in a separate cohort of DFCI patient samples. BH3 profiling reveals BCL-2 dependence in ETP-ALL in a separate cohort of DFCI patient samples. A, BH3 profiling of pediatric and adult DFCI T-ALL primary samples before initiating treatment. A dot plot of BAD peptide versus HRK peptide is graphed; ETP-ALL are marked in red, and green indicates that ETP status was not determined. Yellow indicates putative BCL-2 dependence, whereas blue indicates putative BCL-XL dependence. The BAD peptide response (B) and the HRK peptide response (C) are plotted for ETP-ALL versus typical T-ALL samples. Statistical significance was calculated using the nonparametric Mann–Whitney test. The primary DFCI T-ALL samples were treated with a six-point dose range from 1 nmol/L to 10 μmol/L of ABT-263 and ABT-199 for 6 hours, and apoptosis was measured by Annexin V and PI staining. The IC50 of ABT-263 and ABT-199 are graphed (D). The ABT-263 (E) and ABT-199 (F) response was compared between the typical T-ALL and ETP-ALL samples. The IC50 for ABT-199 is correlated with the BAD minus the HRK peptide percentage mitochondrial depolarization (G). Correlation was calculated using the nonparametric Spearman r test. Red marks the ETP-ALL cases, green marks cases with undetermined ETP status, and black marks typical T-ALL. Triona Ni Chonghaile et al. Cancer Discovery 2014;4:1074-1087 ©2014 by American Association for Cancer Research