CXC Chemokine Receptor 4 Is Essential for Maintenance of Renal Cell Carcinoma-Initiating Cells and Predicts Metastasis Researchers found that CXC chemokine receptor 4 identifies a subpopulation of tumor-initiating cells in renal cell carcinoma cell lines and plays a role in their maintenance. [Stem Cells] Abstract Wnt/β-Catenin Pathway Represses let-7 MicroRNAs Expression via Transactivation of Lin28 to Augment Breast Cancer Stem Cell Expansion Researchers identified Lin28, a negative let-7 biogenesis regulator, as a novel direct downstream target of Wnt/β-catenin pathway. Loss of function of Lin28 impairs the Wnt/β-catenin pathway-mediated let-7 inhibition and breast cancer stem cell expansion; enforced expression of let-7 blocks the Wnt/β-catenin pathway-stimulated breast cancer stem cell phenotype. [J Cell Sci] Abstract | Full Article Parity Induces Differentiation and Reduces Wnt/Notch Signaling Ratio and Proliferation Potential of Basal Stem/Progenitor Cells Isolated from Mouse Mammary Epithelium Early pregnancy has a strong protective effect against breast cancer in humans and rodents, but the underlying mechanism is unknown. Because breast cancers are thought to arise from specific cell subpopulations of mammary epithelia, researchers studied the effect of parity on the transcriptome and the differentiation/proliferation potential of specific luminal and basal mammary cells in mice. [Breast Cancer Res] Abstract | Full Article | Press Release Melatonin-Induced Methylation of the ABCG2/BCRP Promoter as a Novel Mechanism to Overcome Multidrug Resistance in Brain Tumor Stem Cells Eradication of the brain tumor stem cell compartment is essential to achieve a stable and long-lasting remission. Results point out a possible relationship between the downregulation of ABCG2/BCRP function and the synergistic toxic effect of melatonin and chemotherapeutic drugs. [Br J Cancer] Abstract De-Regulated MicroRNAs in Pediatric Cancer Stem Cells Target Pathways Involved in Cell Proliferation, Cell Cycle and Development Investigators hypothesized that a common signature of deregulated microRNAs in the cancer stem cells (CSCs) fraction may explain the disrupted signaling pathways in CSCs. [PLoS One] Full Article Oncolytic Bovine Herpesvirus Type 1 Infects and Kills Breast Tumor Cells and Breast Cancer-Initiating Cells Irrespective of Tumor Subtype Results suggest that oncolytic bovine herpesvirus type 1 targets bulk breast cancer cells and cancer-initiating cells from luminal and basal subtypes by a novel mechanism that is not contingent upon cellular receptor expression status. [Cancer Gene Ther] Abstract Identification of a Subpopulation of Nasopharyngeal Carcinoma Cells with Cancer Stem-Like Cell Properties by High Aldehyde Dehydrogenase Activity Cancer stem cells have been reported as a new therapeutic target in many cancers, but their existence in nasopharyngeal carcinoma (NPC) is largely unknown. This study was conducted to determine cancer stem-like cells in a NPC cell line. [Laryngoscope] Abstract A Physical Sciences Network Characterization of Non-Tumorigenic and Metastatic Cells To investigate the transition from non-cancerous to metastatic from a physical sciences perspective, the Physical Sciences-Oncology Centers Network performed molecular and biophysical comparative studies of the non-tumorigenic MCF-10A and metastatic MDA-MB-231 breast epithelial cell lines, commonly used as models of cancer metastasis. [Sci Rep] Full Article | Press Release  |