Marieke A. de Graaff, Shruti Malu, Irma Guardiola, Alwine B

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High-Throughput Screening of Myxoid Liposarcoma Cell Lines: Survivin Is Essential for Tumor Growth  Marieke A. de Graaff, Shruti Malu, Irma Guardiola, Alwine B. Kruisselbrink, Yvonne de Jong, Willem E. Corver, H. Gelderblom, Patrick Hwu, Torsten O. Nielsen, Alexander J. Lazar, Neeta Somaiah, Judith V.M.G. Bovée  Translational Oncology  Volume 10, Issue 4, Pages 546-554 (August 2017) DOI: 10.1016/j.tranon.2017.05.007 Copyright © 2017 The Authors Terms and Conditions

Figure 1 Hits of high throughput in vitro drug screen of three MLS cell lines. List of 27 drugs with a reduction in cell viability of >50% in two or all three cell lines at a drug concentration of 100 nM. Strong inhibitory effect of the survivin inhibitor YM155 is observed in two out of three MLS cell lines. Also, a good response is observed to several conventional chemotherapeutics, like doxorubicin, gemcitabine, and paclitaxel. Per drug, four concentrations (1, 10, 100, and 1000 nM) are tested; green boxes correspond to a high cell viability (~100%) and red boxes to a loss of cell viability (~0%). For comparison, at the bottom, five compounds are randomly shown that did not meet the criteria. Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Figure 2 Role of survivin in MLS cell lines. Dose-response curves for YM155 (72 hours) in MLS cell lines. Error bars represents three experiments performed in triplicates (A). Normalized RNA expression of three survivin isoforms in cell lines showing relative abundance of the Δex3 isoform (B). Survivin immunohistochemistry of FFPE cell pellets revealed a strong nuclear survivin expression in the cell lines 402-91 (C), 1765-92 (D), and DL-221 (E) (20× magnification). Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Figure 3 High nuclear expression of survivin in MLS. Immunohistochemical analysis of nuclear survivin expression in 32 MLS patients showing high expression in tumor components with myxoid, intermediate, and round cell morphology (A). High nuclear survivin expression in tumor with myxoid morphology (B). High nuclear survivin expression in tumor with round cell morphology (C) (20× magnification). Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Figure 4 Effect of YM155 on apoptosis and cell cycle. YM155 does not cause PARP-dependent apoptosis but increases S-phase in two of the MLS cell lines. Western blot analysis for PARP and cleaved PARP expression in MLS cell lines (A). FACS cell cycle analysis of MLS cell lines treated with YM155 for 48 hours, measured in two independent experiments. Two cell lines, 402-91 and 1765-92, show a decrease in G1 and an increase in S-phase after treatment. DL-221 does not show a difference in cell cycle distribution (B). Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Supplementary Figure 1 Dose-response curves of MLS cell lines after monotherapy with everolimus (A) and panobinostat (B) after 72 hours of treatment. Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Supplementary Figure 2 Knockdown BIRC5. BIRC5 siRNA resulted in a partial decrease of cell viability (402-91, 69%; 1765-92, 55%; and DL-221, 69%). The transfection was successful as all three MLS cell lines and the control siRNA GAPDH showed a minor reduction of cell viability, whereas transfection with the positive control siPLK1 resulted in all three cell lines with a pronounced decrease in cell viability. The transfection reagent alone hardly affected cell viability (A). A reduction in GAPDH and survivin protein expression was found after transfection with, respectively, siGAPDH and siBIRC5 in all three cell lines, although knockdown efficiency was variable (B). Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions

Supplementary Figure 3 Combination treatment of cell line 402-91 and DL-221 with panobinostat and trabectedin (A and B) showed no synergism or antagonism. Combination therapy of three MLS cell lines with trabectedin and YM155 also demonstrated no synergism or antagonism (C-E). Translational Oncology 2017 10, 546-554DOI: (10.1016/j.tranon.2017.05.007) Copyright © 2017 The Authors Terms and Conditions