0000000001251560

AUTHOR

Colin Watts

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The NG2 Proteoglycan Protects Oligodendrocyte Precursor Cells against Oxidative Stress via Interaction with OMI/HtrA2.

2015

The NG2 proteoglycan is characteristically expressed by oligodendrocyte progenitor cells (OPC) and also by aggressive brain tumours highly resistant to chemo- and radiation therapy. Oligodendrocyte-lineage cells are particularly sensitive to stress resulting in cell death in white matter after hypoxic or ischemic insults of premature infants and destruction of OPC in some types of Multiple Sclerosis lesions. Here we show that the NG2 proteoglycan binds OMI/HtrA2, a mitochondrial serine protease which is released from damaged mitochondria into the cytosol in response to stress. In the cytosol, OMI/HtrA2 initiates apoptosis by proteolytic degradation of anti-apoptotic factors. OPC in which NG…

lcsh:MedicineApoptosisdrug effects [Cytosol]HTRA2 protein humangenetics [RNA Small Interfering]genetics [Serine Endopeptidases]genetics [Glioblastoma]570 Life sciencespathology [Glioblastoma]MiceCytosolCerebellumpathology [Cerebellum]RNA Small Interferinglcsh:Sciencemetabolism [Antigens]Mice Knockoutchondroitin sulfate proteoglycan 4metabolism [Proteoglycans]Brain NeoplasmsSerine Endopeptidasesdrug effects [Mitochondria]metabolism [Cerebellum]High-Temperature Requirement A Serine Peptidase 2Mitochondriametabolism [Brain Neoplasms]Gene Expression Regulation Neoplasticpharmacology [Antibodies Neutralizing]genetics [Mitochondrial Proteins]Proteoglycans570 BiowissenschaftenResearch ArticleProtein BindingSignal Transductionpathology [Brain Neoplasms]Primary Cell Culturedrug effects [Cerebellum]drug effects [Apoptosis]metabolism [Mitochondrial Proteins]Mitochondrial Proteinsantagonists & inhibitors [Proteoglycans]pharmacology [Hydrogen Peroxide]genetics [Antigens]Cell Line Tumormetabolism [Serine Endopeptidases]AnimalsHumansddc:610metabolism [RNA Small Interfering]Antigenslcsh:RHtra2 protein mouseHydrogen Peroxidemetabolism [Mitochondria]Antibodies Neutralizinggenetics [Proteoglycans]genetics [Brain Neoplasms]Mice Inbred C57BLOxidative Stressnervous systemlcsh:Qmetabolism [Cytosol]Glioblastomametabolism [Glioblastoma]
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