The authors showed that tumor-specific pyruvate kinase (PK) M2, but not PKM1, binds to the spindle checkpoint protein Bub3 during mitosis and phosphorylates Bub3 at Y207. This phosphorylation is required for Bub3-Bub1 complex recruitment to kinetochores, where it interacts with Blinkin and is essential for correct kinetochore-microtubule attachment, mitotic/spindle-assembly checkpoint, accurate chromosome segregation, cell survival and proliferation, and active epidermal growth factor receptor-induced brain tumorigenesis. [Mol Cell] Abstract | Press Release Therapeutic Activation of Macrophages and Microglia to Suppress Brain Tumor-Initiating Cells
Investigators found that microglia derived from non-glioma human subjects markedly mitigated the sphere-forming capacity of glioma patient-derived brain tumor-initiating cells in culture by inducing the expression of genes that control cell cycle arrest and differentiation. [Nat Neurosci] Abstract
MOZ-Mediated Repression of p16INK4a Is Critical for the Self-Renewal of Neural and Hematopoietic Stem Cells
Researchers showed that the histone acetyltransferase MOZ controls the proliferation of both hematopoietic and neural stem cells by modulating the transcriptional repression of p16INK4a. [Stem Cells] Abstract
Recruited Brain Tumor-Derived Mesenchymal Stem Cells Contribute to Brain Tumor Progression
Researchers report the infiltration of mesenchymal stem cell (MSC)-like cells into the GL261 murine glioma model. They showed that the infiltration of brain-tumor (BT) derived MSCs correlates to tumor progression; furthermore, BT-MSCs increased the proliferation rate of GL261 cells in vitro. [Stem Cells] Abstract
MGARP Regulates Mouse Neocortical Development via Mitochondrial Positioning
Neocortical development is an extremely complicated process that critically depends on the proper migration, distribution, and positioning of neural cells. Researchers identified mitochondria-localized glutamic acid-rich protein (MGARP) as a negative regulator of neocortical development. [Mol Neurobiol] Abstract
Transplantation of Neural Stem Cells that Overexpress SOD1 Enhances Amelioration of Intracerebral Hemorrhage in Mice
Researchers investigated whether genetic manipulation to overexpress copper/zinc-superoxide dismutase (SOD1) enhances survival of grafted neural stem cells and accelerates amelioration of intracerebral hemorrhage. [J Cereb Blood Flow Metab] Abstract
Glycolysis and Oxidative Phosphorylation in Neurons and Astrocytes During Network Activity in Hippocampal Slices
Using simultaneous measurements of electrophysiological and metabolic parameters during synaptic stimulation in hippocampal slices from mature mice, researchers showed that neurons and astrocytes use both glycolysis and oxidative phosphorylation to meet their energy demands. [J Cereb Blood Flow Metab] Abstract
Selective Vulnerability of Spinal and Cortical Motor Neuron Subpopulations in delta7 SMA Mice
The authors investigated, using stereological quantification methods, the spinal cord and cerebral motor cortex of delta7 spinal muscular atrophy (SMA) mice during development, to verify extent and selectivity of motor neuron loss. [PLoS One] Full Article
Effects of Heat Shock on Survival, Proliferation and Differentiation of Mouse Neural Stem Cells
Researchers examined the effects of heat shock on homogeneous proliferating neural stem cells (NSCs) derived from mouse embryonic stem cells. After heat shock at 42°C for 20 minutes, the proliferating NSCs continued to proliferate, although subtle changes were observed in gene expression and cell survival and proliferation. [Neurosci Res] Abstract
1-Methyl-4-Phenylpyridinium-Induced Cell Death via Autophagy Through a Bcl-2/Beclin 1 Complex-Dependent Pathway
The authors hypothesized that the 1-methyl-4-phenylpyridinium (MPP+) toxicity generally associated with initiating the apoptotic signaling cascade also increases an autophagic phenotype in neuronal cells. Using the SK-N-SH dopaminergic cell lines, they demonstrated that MPP+ increases the expression of microtubule-associated protein light chain 3, an autophagosome membrane marker and the mTOR signaling pathway, and Beclin 1 while decreasing the Bcl-2 levels. [Neurochem Res] Abstract