Abstract
<jats:p><p>SLFN11 expression in multiple myeloma (MM) cell lines and SLFN11 translocation to nucleoli by BTZ. <b>A,</b> Correlation between the expression of <i>SLFN11</i> and <i>SLFN13</i> in the Cancer Therapeutics Response Portal (CTRP)–Broad–MIT cell line database (<a href="https://discover.nci.nih.gov/cellminercdb/" target="_blank">https://discover.nci.nih.gov/cellminercdb/</a>). Correlation coefficient and <i>P</i> value are indicated above the figure. <b>B,</b> Representative SLFN11 immunoblots in MM.1S, KMS-34, and KMS-27 cell lines. Human osteosarcoma cell line U2OS was used as a negative control. <b>C,</b> Scheme of the nucleolus comprising the fibrillar center, the dense fibrillar component, and the granular component. <b>D,</b> Representative immunofluorescence images showing total SLFN11 (green, left, no preextraction) and chromatin-bound SLFN11 (green, right) with nucleolin (red) and DAPI (blue) in MM.1S and KMS-34 cells after 4-hour treatment with BTZ [0.5 μmol/L (MM.1S), 5 μmol/L (KMS-34)] or CPT [1 μmol/L (MM.1S), 5 μmol/L (KMS-34)]. Scale bars, 10 μm. <b>E,</b> Representative immunofluorescence images showing total chromatin-bound SLFN11 (green) with UBF (red) and DAPI (blue) in KMS-34 cells after 4-hour treatment. Scale bars, 10 μm. <b>F,</b> Representative immunofluorescence image showing BTZ-induced SLFN11 nucleolar translocation in U2OS with DOX-inducible SLFN11 expression. Cells were treated with CPT or BTZ (1 μmol/L) for 4 hours.</p></jats:p>