Serine/Threonine Kinase MLK4 Determines Mesenchymal Identity in Glioma Stem Cells in an NF-κB-Dependent Manner Scientists report that mixed lineage kinase 4 (MLK4) is overexpressed in mesenchymal (MES) but not proneural glioma stem cells (GSCs). Silencing MLK4 suppresses self-renewal, motility, tumorigenesis, and radioresistance of MES GSCs via a loss of the MES signature. [Cancer Cell] Abstract miR-126 Regulates Distinct Self-Renewal Outcomes in Normal and Malignant Hematopoietic Stem Cells To investigate miRNA function in human acute myeloid leukemia (AML) stem cells (LSC), scientists generated a prognostic LSC-associated miRNA signature derived from functionally validated subpopulations of AML samples. [Cancer Cell] Full Article | Graphical Abstract Self-Renewal of CD133hi Cells by IL6/Notch3 Signaling Regulates Endocrine Resistance in Metastatic Breast Cancer Researchers developed experimental models of metastatic luminal breast cancer and demonstrated that hormonal therapy (HT) can promote the generation of HT-resistant, self-renewing CD133hi/ERlo/IL6hi cancer stem cells. [Nat Commun] Full Article PAF-Wnt Signaling-Induced Cell Plasticity Is Required for Maintenance of Breast Cancer Cell Stemness Scientists identified PCNA-associated factor (PAF) as a key molecule that controls cancer cell stemness. PAF was highly expressed in breast cancer cells but not in mammary epithelial cells. [Nat Commun] Full Article KCTD12 Regulates Colorectal Cancer Cell Stemness through the ERK Pathway The authors demonstrated that KCTD12, potassium channel tetramerization domain containing 12, is down-regulated in the cancer stem cells-like cells of colorectal cancer. [Sci Rep] Full Article miR-203 Inhibits Proliferation and Self-Renewal of Leukemia Stem Cells by Targeting Survivin and Bmi-1 Researchers identified a novel miR-203/survivin/Bmi-1 axis involved in the regulation of biological properties of leukemia stem cells. [Sci Rep] Full Article Fusion with Stem Cell Makes the Hepatocellular Carcinoma Cells Similar to Liver Tumor-Initiating Cells Research on the fusion of stem cells and cancer cells demonstrated that the fused cells can exhibit stemness and cancer cell-like characteristics. Thus, tumor-initiating cell-like cells were generated. [BMC Cancer] Full Article The Metastatic Potential and Chemoresistance of Human Pancreatic Cancer Stem Cells Cancer stem cells for human pancreatic ductal carcinoma (PDAC) have been identified, but neither the metastatic potential nor the chemoresistance of these cells has been adequately evaluated. The authors have addressed these issues by examining side-population cells isolated from the Panc-1 and BxPC3 lines of human PDAC cells, the oncogenotypes of which differ. [PLoS One] Full Article Differential Roles for DUSP Family Members in Epithelial-to-Mesenchymal Transition and Cancer Stem Cell Regulation in Breast Cancer Investigators showed that the key chromatin-associated kinase PKC-θ directly regulates a subset of DUSP family members. DUSP1, DUSP4, and DUSP6 globally but differentially co-exist with enhancer and permissive active histone post-translational modifications, suggesting that they play distinct roles in gene regulation in epithelial-to-mesenchymal transition/cancer stem cells. [PLoS One] Full Article A miR-34a-Numb Feedforward Loop Triggered by Inflammation Regulates Asymmetric Stem Cell Division in Intestine and Colon Cancer Researchers showed that miR-34a directly suppresses Numb in early-stage colon cancer stem cells, forming an incoherent feedforward loop targeting Notch to separate stem and non-stem cell fates robustly. [Cell Stem Cell ] Abstract | Graphical Abstract |