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DTSTART:19960101T000000 END:STANDARD BEGIN:STANDARD TZNAME:GMT TZOFFSETFROM:+0100 TZOFFSETTO:+0000 DTSTART:19961027T020000 RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20260610T220300Z DTSTART;VALUE=DATE-TIME:20181212T130000 DTEND;VALUE=DATE-TIME:20181212T140000 SUMMARY:BMS Seminar: Successful repair of the spinal cord by Professor Ca therina Becker\, University of Edinburgh TZID:Europe/London UID:20181212-8a1785d8675a41e1016783b6ff1c74a9@warwick.ac.uk CREATED:20181206T153931Z DESCRIPTION:Abstract: Spinal cord injury leads to a massive response of i nnate immune cells (microglia\, macrophages\, neutrophils) both in non-r egenerating mammals and in successfully regenerating zebrafish\, but the role of these immune cells in functional spinal cord regeneration in ze brafish is unclear. We have recently established a spinal cord lesion pa radigm in 3-day-old larval zebrafish. These show axonal and neuronal rep air within 48 hours\, with axons actively navigating a complex extracell ular matrix. We use this highly accessible system to determine interacti ons of innate immune cells and signals in successful spinal cord repair. Inhibiting inflammation reduces and promoting it accelerates axonal reg eneration in larval zebrafish. Similarly\, regeneration of motor neurons is promoted by signals from the innate immune systems. Mutant analyses show that peripheral macrophages\, but not neutrophils or microglia\, ar e necessary for axon regeneration. Macrophage-less irf8 mutants show pro longed inflammation with elevated levels of Il-1β and Tnf-α. Decreasing Il-1β levels or number of Il-1β+ neutrophils rescues functional regenera tion in irf8 mutants. However\, during early regeneration\, interference with Il-1β function impairs regeneration in irf8 and wildtype animals. Inhibiting Tnf-α does not rescue axonal growth in irf8 mutants\, but imp airs it in wildtype animals\, indicating a pro-regenerative role of Tnf- α Hence\, inflammation is tightly and dynamically controlled by macropha ges to promote functional spinal cord regeneration in zebrafish. LOCATION:GLT3\, ÌÇÐÄTV Medical School CATEGORIES:BiomedicalSciences,DivisionalSeminars LAST-MODIFIED:20181206T153931Z ORGANIZER;CN=Jas Bains: END:VEVENT END:VCALENDAR