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The incidence of stroke in children is 2.4 per 100,000 person-years and results in long-term motor and cognitive disability. In ischemic stroke, white matter (WM) is frequently injured, but is relatively understudied compared to grey matter injury. Previous research suggests that the cellular response to WM ischemic injury is different at different ages. Little is known about whether WM repair mechanisms differ in children and adults. We utilized a model of focal ischemic WM injury to determine the oligodendrocyte (OL) response to focal WM ischemic injury in juvenile and adult mice. Methods: Juvenile (21-25 days of age) versus adult (2-3 months of age) mice underwent stereotaxic injection of the potent vasoconstrictor N5-(1-iminoethyhl)-L-ornithine (L-NIO) into the lateral corpus callosum (CC). Animals were sacrificed on postoperative day 3 (acute) or 21 (chronic). Cell birth-dating was performed acutely after WM stroke with 5-ethynyl-2-deoxyuridine (EdU) injected intraperitoneally. Immunohistochemistry was performed, as well as stereology, to measure injury volume. The acute oligodendrocyte progenitor cell (OPC) proliferation and the chronic OL cell fate were determined with immunohistochemistry. Compound action potentials were measured in the CC at acute and chronic time points. Results: Acutely WM injury volume was smaller in juveniles. There was significantly greater OPC proliferation in juvenile animals (acute) compared to adults, but newly born OLs did not survive and mature into myelinating cells at chronic time points. In addition, juveniles did not have improved histological or functional recovery when compared to adults. Protecting newly born OPCs is a potential therapeutic target in children with ischemic stroke.
Pubmed ID: 30861520 RIS Download
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View all literature mentionsA company of professionally trained stereologists, bioscientists, computer engineers, educators, and support personnel that provides comprehensive neurostereology products and services to the global bioscience community. These products and services include: stereology and image analysis software, digital imaging technology, turnkey stereologer solutions, comprehensive stereology and image analysis/image processing software, professional contract services, neurostereology workshops, basic stereology courses, and online stereology webinars. The Center also offers tissue processing (sectioning, staining, slide preparation) and stereology data collection services. Researchers may use equipment and facilities to complete projects with full confidentiality and according to Good Laboratory Practices guidelines.
View all literature mentionsSoftware package as distribution of ImageJ and ImageJ2 together with Java, Java3D and plugins organized into coherent menu structure. Used to assist research in life sciences.
View all literature mentionsThis monoclonal targets GFAP (2E1)
View all literature mentionsA microscopic image capturing software that is meant to be used in conjunction with Q-imaging cameras. Image workflow is managed using a multiple document interface (MDI). There is also a publish image feature to capture high quality images of what is on the screen, including the overlay, the region of interest, and capture of single frames in time lapses or movies.
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